ISO 9001:2015 Certified · 15+ Years Foundry Equipment Manufacturing

Clay Sand Reclamation Line Cut Monthly Sand Purchasing by 80–92%

Mechanical attrition process strips binders from used sand and returns it to production-ready condition — reducing fresh sand costs and waste disposal fees simultaneously.

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Clay sand reclamation line system — modular mechanical attrition units for 3-20+ tons per hour sand recovery

A clay sand reclamation line isn't optional equipment when you're processing 30+ tons of sand daily — it's the difference between buying 15 tons of fresh sand per month versus 3 tons. The system takes used sand from your shakeout station, strips off spent clay binders through mechanical attrition, removes contamination, and returns 80–92% of it to production-ready condition. The remaining 8–20% exits as waste fines (clay particles too degraded to reuse) and metal contamination.

3–5 Tons/Hour

For job shops running 50–100 molds per hour. Compact footprint, standard container shipping.

8–12 Tons/Hour

For mid-volume foundries at 100–200 molds per hour. Balanced throughput and investment.

15–20+ Tons/Hour

For continuous production lines above 200 molds per hour. Maximum reclamation throughput.

Each system includes an attrition mill (strips binders via mechanical friction), vibrating screens (separate by grain size), magnetic separator (removes metal splash), and dust collection (captures airborne particles). The components ship as modular units that fit standard 20-foot or 40-foot containers, then bolt together on your factory floor.

Reclamation Rate Determines Your Sand Budget

Reclamation rate — the percentage of input sand that returns to usable condition — determines your monthly sand purchasing budget. At 75% reclamation, a foundry processing 50 tons per day buys roughly 12.5 tons of fresh sand weekly. At 85% reclamation, that drops to 7.5 tons weekly. Over a year, the difference is 260 tons of sand cost plus the disposal fees you're not paying for the extra waste. Most buyers see payback in 18–36 months depending on local sand prices and disposal costs.

Annual Sand Savings Example (50 tons/day foundry)

Metric 75% Reclamation 85% Reclamation
Fresh sand purchased / week ~12.5 tons ~7.5 tons
Annual difference 260 tons saved + reduced disposal fees
Typical payback period 18–36 months

System Integration

The system integrates into your existing sand loop between shakeout and remixing. Used sand enters the reclamation line, exits as cleaned sand (ready for washing or direct remixing), and returns to your molding station.

1

Shakeout Station

Used sand enters reclamation

2

Reclamation Line

Attrition, screening, separation, dust collection

3

Cleaned Sand Output

Ready for washing or direct remixing

4

Molding Station

Reclaimed sand returns to production

Capacity Matching Is Critical

If your molding line produces 150 molds per hour but reclamation only processes 120 molds' worth of sand per hour, you'll build up a backlog of used sand that eventually forces you to slow down molding or dump sand as waste. We size reclamation capacity at 110–120% of molding output to maintain buffer capacity during peak production.

Cost Analysis

Sand Cost Economics — When Reclamation Pays for Itself

The purchase decision for a clay sand reclamation line comes down to one calculation: how much are you spending on fresh sand and waste disposal each month, and how fast does the equipment pay for itself through those savings?

The Monthly Cost Without Reclamation

Here's the math for a mid-volume foundry processing 50 tons of sand per day (roughly 1,250 tons per month at 25 working days). Without reclamation, you're buying fresh sand to replace what's lost in every casting cycle — call it a 20–30% loss rate depending on your alloy type and sand handling practices. That's 250–375 tons of fresh sand per month.

At $40–60 per ton delivered (typical range for bentonite-bonded molding sand in export markets), you're spending $10,000–22,500 monthly on sand purchases alone. Add waste disposal at $20–40 per ton, and you're paying another $5,000–15,000 to haul away the used sand.

Without Reclamation
Fresh sand purchasing $10,000–22,500/mo
Waste disposal costs $5,000–15,000/mo
Total monthly spend $15,000–37,500/mo

After Adding an 85% Recovery Reclamation System

Now add a reclamation system running at 85% recovery rate. Your fresh sand purchasing drops to 187.5 tons per month (15% of 1,250 tons), costing $7,500–11,250. Waste disposal drops to the same 187.5 tons, costing $3,750–7,500. Total monthly operating cost: $11,250–18,750.

Compare that to the no-reclamation scenario ($15,000–37,500 monthly), and you're saving $3,750–18,750 per month depending on your local sand and disposal costs.

With Reclamation
Fresh sand purchasing $7,500–11,250/mo
Waste disposal costs $3,750–7,500/mo
Total monthly spend $11,250–18,750/mo
Monthly savings $3,750–18,750/mo

Equipment Cost & Payback Period

A mid-volume reclamation system (8–12 tons/hour capacity) typically costs $80,000–120,000 installed. At the conservative end of the savings range ($3,750/month), payback takes 21–32 months. At the higher end ($18,750/month), payback happens in 4–6 months. Most buyers land somewhere in the middle — 12–18 month payback periods are common for foundries in regions with moderate sand costs and strict waste disposal regulations.

Break-Even Threshold

Reclamation makes economic sense when your monthly fresh sand purchasing exceeds 150–200 tons. Below that volume, the equipment cost takes too long to recover. Above that volume, every month you delay installation is money left on the table.

Buyers in high-sand-cost regions (Middle East, parts of Europe) hit payback in under 12 months because their fresh sand costs run $80–100 per ton delivered.

Three Key Payback Variables

Three variables move the payback calculation significantly — covered in the next section of this cost analysis.

Sand Cost in Your Region

If you're paying $30/ton, reclamation is a slower payback than if you're paying $70/ton. Coastal foundries often pay premium prices because local sand sources are depleted and material ships long distances.

Waste Disposal Regulations

Foundries in regions with strict environmental rules pay $40–60 per ton for waste sand disposal — it's classified as industrial waste in most jurisdictions. Foundries in less-regulated areas might pay $10–20 per ton or even dump on-site if they have land. The disposal cost delta directly affects ROI.

Your Current Reclamation Rate

If you're already running a basic reclamation process (even manual screening and reuse), you're not starting from zero. The incremental improvement from 60% manual reclamation to 85% automated reclamation is smaller than the jump from 0% to 85%. Calculate the delta, not the absolute savings.

The Factor Buyers Often Miss: Sand Quality Consistency

Manual or low-efficiency reclamation produces sand with variable clay content and contamination levels, which shows up as inconsistent mold strength and higher defect rates. Automated reclamation with proper screening and magnetic separation delivers consistent sand quality batch after batch, which reduces your scrap rate.

We can't give you a universal number for that benefit — it depends on your current defect rate and the value of your castings — but several buyers have told us the quality improvement alone justified the investment before the sand cost savings even factored in.

Get Your ROI Projection

Share your sand costs, disposal fees, and current reclamation rate — we'll model the payback for your specific operation.

System Configurations — Matching Reclamation Capacity to Your Molding Output

Clay sand reclamation systems scale across three capacity ranges, and the differences aren't just throughput — they're about process control, automation level, and how tightly you can match reclamation output to molding demand.

Small-Volume Configuration

3–5 Tons/Hour

This setup handles foundries running 50–100 molds per hour in 1–2 shift operations. The system includes a single attrition mill processing 3–4 tons of sand per hour, a two-deck vibrating screen for grain size separation, magnetic separator, and bag-type dust collector.

Footprint ~8m × 6m
Power 35–45 kW
Staffing 1 operator/shift
Recovery Rate 80–82%
Small-volume clay sand reclamation system layout showing single attrition mill, vibrating screen, magnetic separator and dust collector in an 8m by 6m footprint

Best Fit: Intermittent Molding Operations

This configuration works when your molding output is intermittent — job shops, prototype foundries, or facilities with frequent product changeovers. The single-loop design means reclamation runs in batches: you accumulate used sand from several hours of molding, run it through reclamation, then feed the cleaned sand back to remixing.

Buffer Storage Requirement

There's no continuous flow, so you need buffer storage for both used sand (before reclamation) and reclaimed sand (before remixing). Plan for 5–8 tons of storage capacity on each side.

Recovery Expectations by Alloy Type

Reclamation rate in this configuration typically hits 80–82% because the single-pass attrition process doesn't catch every grain. Sand that's heavily contaminated or thermally degraded (from high-temperature alloys) exits as waste.

Gray & Ductile Iron 80–82% Standard recovery
Aluminum & Bronze 83–85% Lower sand temps

Mid-Volume Configuration (8–12 tons/hour)

This is the most common configuration for export buyers — it matches foundries running 100–200 molds per hour in 2–3 shift operations. The system upgrades to a larger attrition mill (8–10 tons/hour capacity), three-deck vibrating screen (finer separation), dual magnetic separators (one before screening, one after), and pulse-jet dust collector with automatic filter cleaning. Footprint expands to 12m × 8m, power consumption is 70–85 kW.

Continuous Operation Advantage

The key difference: continuous operation. Used sand feeds into the system at a steady rate, and reclaimed sand exits at the same rate, so you can run molding and reclamation simultaneously without batch delays. This requires automated sand transport — typically a belt conveyor from shakeout to reclamation input, and another conveyor from reclamation output to the remixing station. TZFoundry includes the conveyors in the system package because manual sand handling at this throughput creates bottlenecks.

Mid-volume clay sand reclamation configuration with dual magnetic separators and three-deck vibrating screen — 8 to 12 tons per hour capacity

Mid-volume system layout: 12m × 8m footprint, 70–85 kW

85–88% Reclamation Rate

Three-deck screening separates reusable grains from fines more effectively, and dual magnetic separation catches metal contamination that single-pass systems miss.

Pulse-Jet Dust Collection

Critical at this capacity — bag-type collectors can't handle the dust volume, and you'll spend more time changing clogged filters than running production. Pulse-jet units feature automatic filter cleaning for uninterrupted operation.

PLC Control System

Optional at this capacity level (adds $8,000–12,000 to the base price). Monitors sand flow rates, attrition mill motor load, screen vibration frequency, and dust collector pressure drop — flags operator alerts when parameters drift out of range.

What the PLC Prevents

This isn't full automation — operators still manage the system — but it prevents the common failure modes: overloading the attrition mill, running with a blinded screen, or operating with a saturated dust filter. Each of these scenarios damages equipment or degrades output sand quality, and each is avoidable with real-time parameter monitoring.

15–20+ Tons/Hour

High-Volume Configuration

For foundries running 200+ molds per hour in continuous 24/7 operations

Core Equipment

  • Heavy-duty attrition mill rated at 15–20 tons/hour
  • Four-deck vibrating screen for multi-stage grain separation
  • Triple magnetic separation — before screening, mid-process, and final pass
  • Modular dust collection with redundant filter banks — service one bank while the other runs

Key Specs

Footprint 15m × 10m
Power Consumption 120–150 kW
Reclamation Rate 90–92%
Daily Throughput 300+ tons/day
Operators Per Shift 2
High-volume clay sand reclamation line with closed-loop system layout showing continuous sand flow from shakeout through attrition milling, screening, and remixing

Closed-Loop Sand Cycle

At this scale, reclamation becomes a fully closed-loop system. Sand never leaves the production floor — it cycles from molding to shakeout to reclamation to washing to remixing to molding in a continuous flow.

Automated Moisture Control

Adds water during reclamation to prevent dust generation throughout the process

Temperature Monitoring

Sand exits the attrition mill 15–20°C hotter than it entered due to friction heat — continuously tracked

Real-Time Grain Analysis

Inline sensors perform continuous grain size analysis to maintain output quality

Why 90–92% — and Not Higher

The four-deck screen and triple magnetic separation catch nearly everything reusable. The 8–10% waste consists of:

  • — Clay fines: Particles under 200 mesh that cannot be physically recovered
  • — Heavily oxidized grains: From metal splash zones where grain integrity is compromised

Pushing reclamation rates above 92% requires thermal regeneration — a different technology that uses heat to burn off binders. If your process demands higher recovery, we can discuss thermal regeneration options separately.

Staffing & Control Requirements

This configuration requires two operators per shift, with responsibilities split between:

1
Reclamation System Monitor

Watches attrition mill performance, screen deck separation, and magnetic separator output

2
Sand Loop Manager

Manages the integrated sand loop — washing, remixing, and moisture control

PLC control is mandatory at this scale — manual operation isn't feasible when processing 300+ tons of sand per day.

Capacity Matching Rule

Size your reclamation system to process 110–120% of your molding line's sand consumption. If your molding line uses 10 tons of sand per hour, spec an 11–12 ton/hour reclamation system. The buffer capacity handles production surges, maintenance downtime, and the reality that reclamation efficiency drops slightly when processing heavily contaminated sand.

Under-sizing by even 10% creates a bottleneck that forces you to either slow down molding or dump sand as waste — both of which defeat the purpose of installing reclamation in the first place.

110–120%

Buffer over molding capacity

10%

Under-sizing threshold that creates bottlenecks

Closed-Loop

Sand management when integrated

Integrated Sand Management

Reclamation integrates with our clay sand processing line systems to create a closed-loop sand management system that minimizes fresh sand purchasing and waste disposal costs.

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Engineering Data

Technical Specifications

Side-by-side engineering parameters across three standard capacity tiers — small-volume, mid-volume, and high-volume — so you can match the right clay sand reclamation line to your molding output and facility constraints.

Tier 1

Small-Volume (3–5 t/h)

Processing capacity 3–5 tons/hour
Reclamation rate 80–82%
Power consumption 35–45 kW
Footprint (L × W) 8 m × 6 m
Attrition mill type Single-pass, 3–4 t/h
Screening system 2-deck vibrating screen
Magnetic separation Single-pass
Dust collection Bag-type, manual cleaning
Output grain size 40–70 mesh (retained)
Residual clay content <2% (after reclamation)
Dust collection airflow 3,000–4,000 m³/h
Estimated weight 4–5 tons
Tier 2

Mid-Volume (8–12 t/h)

Processing capacity 8–12 tons/hour
Reclamation rate 85–88%
Power consumption 70–85 kW
Footprint (L × W) 12 m × 8 m
Attrition mill type Continuous, 8–10 t/h
Screening system 3-deck vibrating screen
Magnetic separation Dual-pass
Dust collection Pulse-jet, auto cleaning
Output grain size 40–70 mesh (retained)
Residual clay content <2% (after reclamation)
Dust collection airflow 6,000–8,000 m³/h
Estimated weight 8–10 tons
Tier 3

High-Volume (15–20+ t/h)

Processing capacity 15–20+ tons/hour
Reclamation rate 90–92%
Power consumption 120–150 kW
Footprint (L × W) 15 m × 10 m
Attrition mill type Heavy-duty, 15–20 t/h
Screening system 4-deck vibrating screen
Magnetic separation Triple-pass
Dust collection Modular, redundant filters
Output grain size 40–70 mesh (retained)
Residual clay content <1.5% (after reclamation)
Dust collection airflow 10,000–12,000 m³/h
Estimated weight 15–18 tons

Consistent Grain Size

All three tiers deliver 40–70 mesh retained output — the standard grain distribution for production-grade clay sand molding.

Scaling Reclamation Rates

Recovery rates increase from 80–82% at small volume to 90–92% at high volume through multi-pass magnetic separation and advanced screening.

Dust Collection Scales Proportionally

Airflow ranges from 3,000 m³/h (small) to 12,000 m³/h (high-volume), with dust collection upgrading from manual bag-type to modular redundant filters.

Specifications shown are industry-standard values for this equipment type. Actual specifications vary based on your sand type, contamination levels, and integration requirements. Contact us at sales@tzfoundry.com for detailed engineering data specific to your facility.

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Process Breakdown

How the Reclamation Process Works — From Used Sand to Production-Ready

Used sand enters the reclamation line directly from your shakeout station — it's hot (often 80–120°C depending on your casting temperature and cooling time), contaminated with metal splash and burnt clay, and the grain surfaces are coated with spent binder that needs to be stripped off before the sand can be reused.

1

Stage 1: Attrition Mill

Core Reclamation Stage

This is where the actual reclamation happens. The mill is a cylindrical chamber with rotating paddles or arms that create high-speed particle-on-particle collisions. Sand grains smash into each other at velocities high enough to fracture the clay coating and strip it from the grain surface, but not so high that the grains themselves shatter.

Attrition mill interior showing rotating paddles and sand-on-sand collision zone in a clay sand reclamation system

Operating Parameters

Mill Speed 800–1,200 RPM

Higher speeds for heavily coated sand, lower speeds for lightly used sand

Residence Time 2–4 minutes/batch

Batch mode in small-volume systems; continuous flow in mid- and high-volume configurations

Thermal Consideration

The attrition process generates heat — friction between grains raises sand temperature by 15–20°C. If your input sand is already at 100°C from casting operations, it exits the mill at 115–120°C. This matters because clay binder performance degrades above 40°C, so you'll need a cooling stage before remixing.

Most buyers use a simple belt conveyor with ambient air cooling — 3–4 minutes of transit time drops sand temperature back to 30–35°C.

2

Stage 2: Vibrating Screens

Separation & Classification

Sand exits the attrition mill as a mixture of cleaned grains (40–70 mesh, the reusable fraction), clay fines (under 200 mesh, too small to reuse), and oversized particles (lumps of burnt clay, agglomerated grains, occasional metal chunks). The vibrating screen separates these fractions by passing sand over multiple decks with progressively finer mesh sizes.

Multi-deck vibrating screen separating reclaimed sand into coarse, fine, and waste fractions

Screen Deck Configuration

T
Top Deck — 20 Mesh

Catches oversized material (lumps, metal chunks) and routes it to waste.

M
Middle Deck — 40 Mesh

Retains the coarse fraction of reusable sand.

B
Bottom Deck — 70 Mesh

Retains the fine fraction of reusable sand. Material passing through (under 70 mesh) is mostly clay fines — exits to waste.

Two-Deck vs. Three-Deck Systems

A two-deck system combines the middle and bottom functions into one deck, which is why reclamation rates are slightly lower — you lose some borderline-reusable grains that get classified as fines.

Screen Blinding — Most Common Issue

Clay fines stick to the mesh and reduce effective screen area, which drops throughput and sends reusable sand to waste.

Mid- & High-Volume

Pulse-jet cleaning system — blasts compressed air through the mesh every 30–60 seconds to dislodge stuck particles.

Small-Volume (Bag-Type)

Manual screen cleaning required every 4–8 hours depending on sand contamination levels.

3

Stage 3: Magnetic Separation

Ferrous Metal Removal

Even after screening, sand contains metal contamination from casting operations: metal splash (droplets that land on the mold surface during pouring), broken-off casting fins, and occasional chunks of scrap that made it into the sand system. Metal contamination as low as 0.5% by weight causes mold defects — the metal particles create hard spots that prevent proper compaction, leading to mold cracks and dimensional inaccuracies in the finished casting.

The magnetic separator is a rotating drum or belt with permanent magnets (or electromagnets in high-volume systems) that pulls ferrous metal particles out of the sand stream.

Separation Efficiency by Pass Configuration

Single-pass (small-volume systems) 85–90%
Dual-pass (mid-volume) 95–97%
Triple-pass (high-volume) 98–99%

Non-ferrous limitation: The remaining 1–2% is non-ferrous contamination (aluminum, bronze, brass from your casting operations) that magnetic separation can't remove. You'll need manual inspection or optical sorting if non-ferrous contamination is a problem in your process.

Magnetic drum separator removing ferrous metal particles from reclaimed clay sand stream
4

Stage 4: Dust Collection

Air Quality & Particulate Control

Every stage of reclamation generates airborne dust: the attrition mill creates clay fines, the screens vibrate particles into the air, and sand transport conveyors produce dust at transfer points. Without dust collection, your facility's air quality degrades to unsafe levels within hours.

Regulatory threshold: Silica dust exposure limits are 0.05 mg/m³ in most jurisdictions — you'll exceed that in 30 minutes of uncontrolled reclamation operation.

The dust collector pulls air from enclosed hoods over each process stage, passes it through filter media (fabric bags or cartridge filters), and returns clean air to the facility. Collected dust accumulates in a hopper below the filters and gets discharged periodically (usually into the same waste stream as the screen fines).

Airflow Requirements by System Capacity

3,000–4,000

m³/h

Small-volume

6,000–8,000

m³/h

Mid-volume

10,000–12,000

m³/h

High-volume

Industrial pulse-jet dust collection system with filter cartridges for clay sand reclamation line

Filter Maintenance — The Cost Most Buyers Underestimate

Filter maintenance is the operational cost most buyers underestimate. The choice between bag-type and pulse-jet systems has a significant impact on your total cost of ownership.

Bag-Type Filters

Replacement cycle 6–12 months
Cost per filter set $400–600
Upfront premium Baseline
Recommended for Mid+ Volume

Pulse-Jet Systems

Filter life 12–18 months
Upfront premium $8,000–12,000
ROI payback 18–24 months

Automatically cleans filters with compressed air. At mid- and high-volume throughput, pays for itself in saved filter replacement costs within 18–24 months.

Output to Washing or Remixing

Reclaimed sand exits the system with grain surfaces stripped of spent binder, metal contamination removed, and fines separated out. Residual clay content is typically 1.5–2% by weight (down from 6–8% before reclamation). The sand is now ready for either washing — to remove the residual clay and restore grain surface cleanliness — or direct remixing with fresh clay binder if your process tolerates the residual clay.

Route A: Washing Before Remixing

Most foundries route reclaimed sand to a washing system before remixing. The washing step removes residual clay fines and improves sand grain surface quality, which translates to better mold strength and permeability in production.

Reclaimed sand routed through a clay sand washing system to remove residual clay fines before remixing with fresh binder
View Clay Sand Washing Line specifications

Route B: Direct Remixing

If your process tolerates the residual 1.5–2% clay content, reclaimed sand can bypass washing and go directly to remixing with fresh clay binder before returning to the molding station. This shortens the loop but may require tighter monitoring of sand properties over multiple reclamation cycles.

Reclaimed sand returned directly to the molding station after remixing with fresh clay binder

Residual Clay Reduction

From 6–8% before reclamation down to 1.5–2% after — a 70–75% reduction in residual clay content by weight.

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Sand Quality Analysis

Reclamation Rate & Output Sand Quality

Reclamation rate is the percentage of input sand that exits the system in reusable condition. If you feed 100 tons of used sand into the reclamation line and get 85 tons of cleaned sand out (with 15 tons exiting as waste fines and contamination), your reclamation rate is 85%. This number determines your monthly sand purchasing budget and waste disposal costs, so understanding what affects it matters.

Diagram showing reclamation rate calculation — 100 tons input sand yields 85 tons reusable sand and 15 tons waste fines

Quick Rate Formula

Reclamation Rate =

(Reusable Sand Out ÷ Total Sand In) × 100%

80–92% — typical range for clay sand reclamation lines

85–90% — achievable with lower-temperature alloys (aluminum, bronze)

75–80% — common for high-carbon alloy foundries (cast iron >3.5% C)

Factors That Lower Reclamation Rate

Alloy Type

High-carbon alloys (cast iron above 3.5% carbon, some steel grades) generate more thermal degradation of sand during casting. The sand near the mold-metal interface reaches 400–600°C, which breaks down clay binders and fuses sand grains together into hard lumps.

Key issue: These lumps don't break apart in the attrition mill — they exit as oversized waste. Foundries casting high-carbon alloys typically see 75–80% reclamation rates instead of the 85–90% achievable with lower-temperature alloys like aluminum or bronze.

Sand Temperature at Input

If used sand enters reclamation above 150°C (common when shakeout happens immediately after casting with minimal cooling time), thermal degradation continues during the reclamation process. Clay binders lose binding capacity above 200°C, and sand grains start to sinter (fuse together) above 300°C.

Recommended fix: Install a cooling conveyor between shakeout and reclamation to drop sand temperature to 80–100°C before processing.

Adds 10–15 min to sand loop cycle time
Improves reclamation rate by 5–8 percentage points

Contamination Levels

Metal splash, core sand (if you're using resin-bonded cores in clay sand molds), and foreign debris — floor sweepings, packaging materials, anything that accidentally enters the sand system — all exit as waste.

Clean Operation

Good housekeeping practices keep contamination below 2–3% of sand weight.

Sloppy Operation

Can hit 8–10% contamination, which directly reduces reclamation rate.

The magnetic separator catches ferrous metal, but everything else — resin core sand, non-ferrous metal, organic debris — exits through the screens as waste.

Attrition Mill Wear

The mill's rotating paddles or arms wear down over time — 6–12 months of continuous operation depending on sand abrasiveness. Worn paddles reduce impact velocity, which means incomplete binder removal: sand grains exit with clay coating still attached, fail the screening stage, and get classified as waste.

Replacement Schedule

1

Mid-Volume Systems

Replace mill liners every 6–9 months

2

High-Volume Systems (Abrasive Sand)

Replace mill liners every 4–6 months

Output Sand Quality Specifications

Verified through sieve analysis — the benchmark for production-ready reclaimed sand.

Grain Size Distribution — Target Parameters

Reclaimed sand should match the grain size distribution of fresh molding sand. The following targets apply to production-ready output:

85–95%

Grains in 40–70 mesh range

(0.21–0.42 mm particle size)

< 5%

Oversized grains

(above 40 mesh)

< 10%

Fines

(below 70 mesh)

Sieve Analysis Verification Method

Take a 100-gram sample of reclaimed sand and pass it through a stack of sieves:

20 mesh 40 mesh 50 mesh 70 mesh 100 mesh 140 mesh 200 mesh

Weigh the retained fraction on each sieve and calculate the distribution.

Red Flag: More Than 15% Fines

If your reclaimed sand shows more than 15% fines, either your screening system isn't working properly or your input sand is too degraded to reclaim effectively. In either case, investigate before continuing production — running high-fines sand through your molding line will degrade casting surface finish and increase defect rates.

Sieve analysis equipment showing grain size distribution testing for reclaimed clay sand quality verification

Residual Clay Content

After reclamation, sand should contain less than 2% clay by weight — measured by washing a sample and weighing the clay fines that wash out. This is the clay coating that the attrition mill didn't fully remove.

Above 3% residual clay: Your attrition mill isn't running aggressively enough — increase rotor speed or residence time.

Below 1% residual clay: You're over-processing the sand (wasting energy and generating excessive fines) — dial back the mill intensity.

Moisture Content

Reclaimed sand exits the system at 0.5–1.5% moisture (absorbed water from ambient humidity and any water injection used for dust suppression during reclamation).

Important: This is too dry for molding. Clay sand molding requires 3–5% moisture for proper compaction. You'll add water during the remixing stage when you blend reclaimed sand with fresh clay binder.

Testing Procedures

Most foundries test reclaimed sand quality once per shift (every 8 hours) or once per day in low-volume operations.

Pull a 500-gram sample from the reclamation output conveyor

Run sieve analysis for grain size distribution

Measure clay content via wet sieving (wash through a 200-mesh screen, weigh retained material)

Check moisture content with a moisture analyzer or oven-dry method

If any parameter falls outside your target range, adjust the reclamation process before the off-spec sand reaches your molding station.

The Quality Control Loop

Reclaimed Sand Testing Remixing with Fresh Clay Molding Casting Shakeout Reclamation

If your castings show defects — surface roughness, dimensional inaccuracy, mold cracking — trace back to sand quality. Often the root cause is inconsistent reclaimed sand: either the reclamation rate is dropping (worn mill liners, blinded screens) or contamination is creeping up (poor housekeeping, inadequate magnetic separation).

Fix the reclamation process, and the casting defects disappear.

Integration with Your Existing Foundry Equipment

A reclamation line doesn't operate standalone — it's one component in your foundry's sand loop. Understanding the material flow and how reclamation connects to your existing equipment determines whether the system becomes a productivity asset or a bottleneck.

Material Flow Sequence

The complete sand loop runs continuously through these stages:

1

Molding Station

Sand enters the production cycle at the molding station.

2

Casting & Shakeout

Sand separates from finished castings during shakeout.

3

Used Sand Storage

Buffer before reclamation absorbs production surges.

4

Reclamation Line

Cleaning and contamination removal restores sand quality.

5

Reclaimed Sand Storage

Buffer before washing/remixing prevents line backup.

6

Washing System

Removes residual clay fines from reclaimed sand.

7

Clay Addition & Remixing

Fresh clay binder added to reclaimed sand for reuse.

8

Prepared Sand Storage

Final buffer before sand returns to molding station.

9

Back to Molding

The loop repeats continuously throughout production.

Clay sand reclamation line material flow diagram showing the complete sand loop from molding station through shakeout, reclamation, washing, remixing, and back to molding

Buffer Storage — The Key to Continuous Operation

The two buffer storage points — before reclamation and after reclamation — are critical for continuous operation.

Pre-Reclamation Buffer

If your molding line produces sand faster than reclamation can process it — even temporarily during a production surge — the pre-reclamation buffer absorbs the excess. Without adequate buffer capacity, excess used sand has nowhere to go, forcing you to slow production or dump sand as waste.

Post-Reclamation Buffer

If reclamation produces cleaned sand faster than your remixing station can consume it, the post-reclamation buffer prevents the reclamation line from backing up and shutting down. This buffer ensures continuous throughput regardless of downstream processing speed.

Buffer Sizing Rule

Size each buffer for 2–4 hours of production volume. If you're processing 10 tons of sand per hour, plan for 20–40 tons of storage capacity on each side of the reclamation line.

Capacity Matching Calculation

Your reclamation system must process at least 110% of your molding line's sand consumption rate. Here's how to calculate it:

Three-Step Calculation

1

Measure sand consumption rate

Molding line output (molds/hour) × sand weight per mold (typically 20–50 kg depending on mold size) = sand consumption rate in kg/hour.

2

Convert to tons/hour

Divide kg/hour by 1,000 to get your base rate in tons/hour.

3

Apply buffer multiplier

Multiply by 1.1–1.2 for buffer capacity. This is your minimum reclamation system capacity.

Worked Example

150 molds/hour × 30 kg/mold = 4,500 kg/hour = 4.5 tons/hour sand consumption.

Multiply by 1.15 for buffer = 5.2 tons/hour minimum reclamation capacity.

You'd spec a 5–6 ton/hour system (small-volume configuration) or step up to an 8–10 ton/hour system (mid-volume) if you're planning production expansion within the next 2–3 years.

Under-Sizing Creates a Slow-Building Crisis

Under-sizing reclamation by even 10% creates compounding problems: used sand accumulates faster than you can reclaim it, your pre-reclamation buffer fills up, and eventually you're forced to either slow down molding (losing production capacity) or dump used sand as waste (defeating the purpose of reclamation). We've seen buyers try to save money by under-sizing reclamation, then spend more money later upgrading to a larger system — plus the lost revenue from production constraints in the interim.

Space Requirements for Retrofits

If you're adding reclamation to an existing foundry rather than designing a new facility with reclamation included from the start, floor space is usually the limiting factor. A mid-volume reclamation system needs 12m × 8m of floor space for the equipment itself, plus another 4–6m of clearance on the input and output sides for sand conveyors and buffer storage.

Total footprint: roughly 16m × 8m (128 m²). If you don't have that much contiguous floor space, you can split the system into two levels — attrition mill and screens on the main floor, dust collector and magnetic separator on a mezzanine — but that adds structural steel cost and complicates maintenance access.

Ceiling Height Consideration

Ceiling height matters for dust collection — the dust collector typically stands 4–5 meters tall, and you need another 1–2 meters of clearance above it for ductwork connections. If your facility has low ceilings (under 6 meters), you'll need a horizontal dust collector configuration, which increases floor space requirements by 20–30%.

Floor plan showing retrofit space requirements for a clay sand reclamation system in an existing foundry — 16m × 8m total footprint with conveyor clearance zones

Connecting to Existing Conveyors

Most foundries already have some form of sand transport between shakeout and remixing. The reclamation line needs to tap into this flow — here's how we handle each transport type.

Belt Conveyors

We provide a diverter gate that routes used sand from the main conveyor into the reclamation input hopper. Simple integration with your existing belt conveyor infrastructure.

Bucket Elevators

We add a discharge chute at the appropriate height to redirect sand flow from your bucket elevator system into the reclamation input.

Manual / Forklift Transport

Common in small job shops — we design the reclamation input hopper for forklift or front-loader dumping, eliminating the need for conveyor infrastructure.

Output Side Integration

Output side is simpler — reclaimed sand exits via a discharge conveyor that feeds into your existing washing or remixing system. The discharge conveyor runs at a controlled rate matching your downstream capacity to prevent overloading the washing system.

Electrical Integration

Reclamation systems draw 35–150 kW depending on capacity (see the specifications table earlier). Most foundries install a dedicated circuit breaker and transformer for the reclamation line rather than tapping into existing foundry power — it simplifies troubleshooting and prevents voltage sags from affecting other equipment.

You'll need 380–415V three-phase power (standard industrial supply in most export markets). If your facility runs 440V or 480V (common in North America), we can supply motors wound for those voltages at no additional cost — specify your voltage during the quotation phase.

Control Integration

The reclamation system's PLC (if you're specifying the mid- or high-volume configuration with PLC control) can communicate with your existing foundry control system via Modbus TCP, Profibus, or Ethernet/IP protocols.

This allows your central control room to monitor reclamation status, receive alarm notifications, and log production data. If you're not running a centralized control system, the reclamation PLC operates standalone with a local HMI touchscreen for operator interface.

Dust Collection Tie-Ins

If your facility already has a central dust collection system serving multiple process areas, you can tie the reclamation line's dust pickup points into the existing ductwork — saves the cost of a dedicated dust collector for reclamation.

This works if your central system has spare capacity — add up the reclamation line's airflow requirement (3,000–12,000 m³/h depending on system size) and verify your central collector can handle the additional load without dropping below the minimum transport velocity in the ductwork (typically 18–20 m/s for sand dust).

Dust Collection Capacity Warning

If your central dust collection system is already running near capacity, install a dedicated dust collector for reclamation. Trying to force too much airflow through an undersized central system means neither system works properly.

Need an Integrated System Instead of a Retrofit?

See our complete clay sand processing line systems for integrated molding + reclamation configurations designed as unified systems rather than retrofitted components.

View Processing Lines
Total Cost of Ownership

Operational Costs — Energy, Consumables, Maintenance

The purchase price is one number. The cost to run the system for the next 10 years is another number — often larger. Here's what you're actually paying for after the equipment arrives.

Energy Consumption

The single largest ongoing cost line for most installations

A mid-volume reclamation system (8–12 tons/hour) consumes 70–85 kW during operation. The largest energy consumers break down as follows:

Attrition Mill Motor 35–40 kW
Vibrating Screen Motors 15–20 kW
Dust Collector Fan 12–15 kW
Conveyor Motors (Combined) 8–10 kW

At 80 kW average load running 16 hours per day (two shifts), that's 1,280 kWh daily. At $0.10 per kWh (typical industrial rate in many export markets), you're spending $128 per day or $3,200 per month in electricity cost (assuming 25 working days).

Control panel monitoring energy consumption on a clay sand reclamation system

Mid-Volume Benchmark

Daily Load 1,280 kWh
Monthly Cost $3,200
Rate Basis $0.10/kWh

Monthly Energy Cost by System Volume

System Class Throughput Power Draw Monthly Electricity kWh / Ton
Small-Volume 3–5 tons/hour 35–45 kW $1,400–1,800 9–11 kWh/ton
Mid-Volume 8–12 tons/hour 70–85 kW ~$3,200 —
High-Volume 15–20+ tons/hour 120–150 kW $5,000–6,000 7–9 kWh/ton

The per-ton energy cost drops as you scale up because larger equipment runs more efficiently — a high-volume system uses 7–9 kWh per ton processed versus 9–11 kWh per ton for small-volume systems.

Regional Energy Cost Impact

Energy cost matters most in regions with expensive electricity. In those markets, the energy cost can approach 20–30% of your total reclamation operating cost. In regions with cheap power, energy is a minor line item compared to consumables and labor.

High-Cost Regions

$0.20–0.25/kWh

Parts of Europe

Very High-Cost

>$0.30/kWh

Some island markets

Low-Cost Regions

$0.05–0.08/kWh

Middle East, parts of Asia

Consumables — Attrition Mill Liners

The primary wear part in any sand reclamation system

The mill's rotating paddles or chamber liners wear down from constant sand abrasion. Liner life depends on sand hardness and throughput volume.

Liner Life by Sand Type (Mid-Volume Systems)

Silica Sand (most common) 6–9 months
Chromite / Zircon (harder sands) 4–6 months
Olivine / Synthetic (softer sands) 9–12 months

Replacement Cost & Downtime

Mid-Volume Liner Set

$1,200–1,800

High-Volume Liner Set

$2,500–3,500

Installation takes 4–6 hours and requires a maintenance shutdown — you can't swap liners while the mill is running. Most buyers schedule liner replacement during planned maintenance windows or between production shifts to minimize downtime.

When to Check Mill Liners

The symptom of worn liners: reclamation rate drops gradually over weeks or months. You're feeding the same sand into the system, but output volume decreases and waste volume increases. If your reclamation rate drops from 85% to 78–80% and you haven't changed anything else in your process, check the mill liners — they're probably worn down to 40–50% of original thickness.

Attrition mill liner comparison showing new versus worn liners at 50% thickness

Quick Reference

  • Schedule liner checks at each planned maintenance window
  • Track reclamation rate weekly to spot gradual decline
  • Keep one spare liner set on-site to avoid production delays
  • Harder sands (chromite, zircon) need 1.5–2× replacement frequency

Vibrating Screen Meshes

Screen meshes wear from sand abrasion and from the mechanical stress of constant vibration. Mesh life runs 6–12 months depending on sand abrasiveness and screen loading — overloading the screen accelerates wear significantly.

Replacement Cost by System Size

Mid-volume systems (3 decks) $300–500
High-volume systems (4 decks) $600–900

Mesh replacement is faster than liner replacement — 2–3 hours per deck, and you can do one deck at a time without shutting down the entire system. Bypass that deck temporarily and accept slightly lower separation efficiency while the swap is in progress.

Practical tip: Most buyers keep one spare mesh set on-site so they can swap immediately when a mesh tears or blinds beyond cleaning.

Dust Collector Filters

Filter Type Lifespan Cost per Set
Bag-type (small-volume) 6–12 months $400–600
Pulse-jet (mid & high-volume) 12–18 months $800–1,200

Filter life depends on dust loading and how well you maintain the pulse-cleaning system. If the compressed air supply drops below 0.6 MPa or the pulse valves stick, filters clog faster and need earlier replacement.

Saturated Filter Symptoms

  • Dust collector pressure drop increases (check the gauge if your system has one)
  • Airflow decreases noticeably
  • Dust starts escaping from the system into your facility

Don't wait until you see visible dust. Check pressure drop weekly and replace filters when pressure drop exceeds 1,500–2,000 Pa (bag-type threshold) or 2,000–2,500 Pa (pulse-jet threshold).

Vibrating screen mesh sets and pulse-jet dust collector filters used in clay sand reclamation line maintenance

Daily Maintenance Tasks

These tasks take 20–30 minutes total and can be handled by your production operators as part of their routine equipment checks. No specialized skills required — just basic mechanical awareness and a checklist.

Lubrication Points — Every 8–12 Hours

Bearing housings on the attrition mill, screen motors, conveyor drive rollers need greasing every 8–12 hours of operation. Most buyers do this at shift changes — takes 10–15 minutes with a grease gun.

Belt Tension Check

Check belt tension on conveyors. Loose belts slip and reduce throughput — a quick visual and manual check catches this before it affects production.

Magnetic Separator Inspection

Metal particles accumulate on the magnet surface and need to be scraped off daily, otherwise separation efficiency drops. A simple wipe-down keeps extraction rates consistent.

Dust Collector Discharge Valve

Verify the dust collector is discharging collected dust properly. If the discharge valve sticks, the hopper fills up and dust backs up into the filters — catching this early avoids costly filter damage.

Weekly Maintenance Tasks

Weekly tasks take 2–3 hours and need a maintenance technician with basic mechanical skills. You're not disassembling anything — just inspecting and measuring to catch problems before they cause breakdowns.

Bearing Temperature Checks

Use an infrared thermometer to scan all rotating equipment. Bearings running above 70–80°C indicate inadequate lubrication or impending failure — early detection here prevents catastrophic bearing seizure.

Motor Vibration Checks

Excessive vibration indicates misalignment, worn bearings, or unbalanced rotating components. A handheld vibration meter gives you a quick baseline reading to trend over time.

Hydraulic Fluid Level

Applicable if your system uses hydraulic drives. Most configurations don't, but some high-volume setups use hydraulic motors for the attrition mill. Check fluid level and look for leaks at fittings.

Screen Mesh Inspection

Look for tears, holes, or areas where the mesh is sagging — these are early warning signs that replacement is coming soon. Catching mesh degradation early prevents oversized particles from contaminating your reclaimed sand output.

Operator Skill Level Required

Daily tasks — production operators with basic mechanical awareness and a checklist. Weekly tasks — maintenance technician with basic mechanical skills. No specialized training beyond standard foundry equipment familiarity is needed for either tier.

Maintenance technician performing daily inspection on clay sand reclamation line bearing housings and conveyor systems

Quarterly Overhaul Schedule

Quarterly overhauls cover the deeper mechanical and control-system checks that keep your reclamation line running at rated capacity between major service intervals.

Gearbox Oil Changes

Attrition mill gearbox and screen drive gearboxes — drain, flush, and refill with manufacturer-specified lubricant. Inspect for metal particulate in old oil (early warning of bearing or gear wear).

Conveyor Chain Inspection

Inspect chain links, sprockets, and tensioners across all conveyor runs. Replace chains showing elongation or worn link plates before they fail under load.

PLC Battery Backup Replacement

The PLC uses a battery to retain program memory when powered off — batteries last 2–3 years, but checking them quarterly catches failures before you lose your program. A dead battery during an unexpected power outage means reprogramming from backup.

Dust Collector Pulse Valve Testing

Verify all pulse valves are firing properly. A stuck valve means one section of filters isn't getting cleaned, which accelerates clogging and reduces dust extraction efficiency across the entire system.

Downtime Planning

Quarterly overhauls require a full production shutdown — plan for 8–12 hours of downtime. Schedule these during low-volume periods, between major production runs, or during facility-wide maintenance shutdowns. You'll need a maintenance technician plus one helper (some tasks like gearbox oil changes are two-person jobs).

Labor Requirements by System Size

Staffing needs scale with throughput — not linearly, but in discrete steps as monitoring demands shift from periodic checks to dedicated oversight.

System Volume Operators per Shift Attention Level
Small-Volume 1 operator (shared with molding line) Periodic checks — operator monitors both reclamation and molding, not stationed full-time at the reclamation system
Mid-Volume 1 operator per shift More time on reclamation monitoring — higher throughput means problems develop faster and need quicker response
High-Volume 1 dedicated operator per shift Focused on the reclamation system and integrated sand loop (washing, remixing, moisture control)

Operator Skill Level & Training

Basic Systems

Basic systems require foundry experience but no specialized training. Operators need to recognize normal operation versus abnormal conditions — unusual noises, vibration, dust leakage, throughput drops — and know when to call maintenance versus when to adjust process parameters themselves.

Commissioning Training Included

We provide 2–3 days of on-site training during commissioning covering startup procedures, normal operation, parameter adjustment, routine maintenance, and basic troubleshooting.

PLC-Controlled Systems

Mid- and high-volume PLC-controlled systems need operators who can read alarm codes and navigate touchscreen interfaces. This isn't advanced programming — it's the ability to interpret what the PLC is telling them and respond appropriately.

Additional Control System Training

If your team doesn't have PLC interface experience, plan for an extra 2–3 days of training focused on the control system — alarm interpretation, parameter navigation, and response protocols.

Operator training session on PLC touchscreen interface during TZFoundry reclamation line commissioning

On-Site Spare Parts Strategy

High-wear components — mill liners, screen meshes, dust filters — should be stocked on-site as one complete set of each. The investment is 5–8% of the original equipment price, but it eliminates the risk of a 1–2 week production shutdown waiting for parts to ship from China and clear customs.

TZFoundry stocks these items at our Qingdao facility and ships via DHL or FedEx for 5–7 day delivery to most export markets — though customs delays can add another 3–7 days depending on your country's import procedures.

Recommended On-Site Stock

  • Mill liners (1 complete set)
  • Screen meshes (1 complete set)
  • Dust filters (1 complete set)

Rapid-Response Parts for Critical Components

Longer-lead items — motors, gearboxes, PLC controllers, magnetic separator assemblies — are expensive to stock as spares, running 15–25% of equipment cost for a full spare set. Most buyers don't keep them on-site.

Instead, TZFoundry maintains a rapid-response parts program: if a critical component fails, we ship a replacement within 24–48 hours and provide remote technical support to guide your team through the installation.

Slow-Customs Regions — Extra Precaution

For buyers in regions with slow customs (some African and South American markets where industrial equipment can sit in customs for 2–4 weeks), we recommend stocking at least one spare motor and one spare gearbox — the two most likely failure points in continuous operation.

Need a detailed cost breakdown for your specific capacity? Our engineering team can model energy, consumable, and maintenance costs based on your molding line output and sand type.

Request operational cost projection
Section 8 of 10

Quality Control & Troubleshooting

Reclamation effectiveness shows up in two places: the output sand quality (grain size distribution, contamination levels, residual clay content) and the reclamation rate (percentage of input sand that exits as reusable material). Both need regular monitoring to catch problems before they affect your molding operation.

Output Sand Testing — Sieve Analysis

Per-Shift Quality Gate

Pull a 500-gram sample from the reclamation output conveyor once per shift (every 8 hours) or once per day in low-volume operations. Pass the sample through a stack of sieves (20, 40, 50, 70, 100, 140, 200 mesh) using a mechanical sieve shaker (10 minutes of shaking at standard amplitude). Weigh the retained fraction on each sieve and calculate the percentage distribution.

Target Distribution for Reclaimed Clay Sand

✓

85–95% in the 40–70 mesh range (reusable fraction)

✓

Less than 5% oversized (above 40 mesh)

✓

Less than 10% fines (below 70 mesh)

Troubleshooting: Distribution Shift

If your distribution shifts — for example, you're seeing 15–20% fines instead of 10% — either your input sand is more degraded than usual (thermal damage from high-temperature casting) or your screening system isn't working properly. Check for blinded meshes, insufficient vibration amplitude, or overloading.

Output Sand Testing — Clay Content

Wash Test Protocol

Wash a 100-gram sample through a 200-mesh screen with running water until the wash water runs clear (usually 3–5 minutes). Dry the retained material in an oven at 105–110°C for 2 hours, then weigh it. The weight loss is the clay content that washed out.

Target Residual Clay Content

<2%

Clay by weight after reclamation. This is your pass/fail threshold for production-ready reclaimed sand.

Troubleshooting: Elevated Clay Content (3–4%)

If you're seeing 3–4% residual clay, your attrition mill isn't stripping binders effectively. Corrective action: increase rotor speed or residence time in the attrition stage to improve clay separation from the grain surface.

Clay content wash test procedure showing 200-mesh screen wash, oven drying at 105-110°C, and weighing steps for reclaimed sand quality verification

Recommended Testing Schedule

Run sieve analysis and clay content tests once per shift (every 8 hours) for standard production volumes, or at minimum once per day for low-volume operations. Consistent testing catches drift before it reaches your molding line.

Output Sand Testing — Visual Inspection

Grab a handful of reclaimed sand and look at it under good lighting. Clean reclaimed sand should be uniform in color (typically tan to light brown for silica sand), free-flowing (not clumpy), and free of visible metal particles or burnt clay lumps.

Dark streaks (metal contamination):

Your magnetic separator isn't working — check for magnet strength degradation or buildup on the magnet surface.

Black or dark brown lumps (burnt clay):

Your screening system is letting oversized material through — check for torn meshes or insufficient screen amplitude.

Reclamation Rate Monitoring

Weigh your input sand (used sand entering the reclamation line) and output sand (cleaned sand exiting to washing/remixing) over a full shift or full day of operation.

Formula

Reclamation Rate = (Output Weight ÷ Input Weight) × 100%

Most systems don't have continuous weighing, so you're doing this as a periodic check (weekly or monthly) rather than real-time monitoring.

Rate Drop Alert Threshold

If your reclamation rate drops by more than 3–5 percentage points from baseline (e.g., from 85% to 80%), investigate immediately.

Worn Mill Liners

Insufficient binder removal — sand exits with clay coating still attached.

Blinded Screen Meshes

Reusable sand classified as waste — reduces output volume.

Magnetic Separator Failure

Metal contamination routed to waste stream instead of being captured.

Increased Input Sand Degradation

Thermal damage from process changes in your casting operation.

Common Issues and Fixes

Declining Reclamation Rate Over Weeks/Months

Almost always worn mill liners. The attrition mill's impact force decreases as liners wear down, so binder removal becomes less effective. Sand grains exit with clay coating still attached, fail the screening stage, and get classified as waste.

Fix

Replace mill liners.

Prevention

Track liner wear by monitoring reclamation rate — when it drops 3–5 points from baseline, schedule liner replacement before it drops further.

Sudden Drop in Throughput

Root Cause

Screen blinding. Clay fines stick to the screen mesh and reduce effective screen area, which backs up the system and reduces throughput.

Immediate Fix

Check for screen blinding first. If you have pulse-jet cleaning, verify the compressed air supply is working — check the pressure gauge, which should read 0.6–0.8 MPa. If you have bag-type screens, shut down and manually clean the meshes (takes 30–60 minutes).

Prevention

Maintain proper dust suppression — a light water spray on the screen feed reduces fines adhesion. Do not overload the system beyond rated capacity.

Dust Leakage from the System

Root Cause

Saturated dust collector filters. When filters clog, airflow drops below the minimum needed to capture dust at generation points, and dust escapes into your facility.

Immediate Fix

Replace filters immediately — do not wait for the scheduled replacement interval.

Prevention

Monitor dust collector pressure drop weekly. Replace filters when pressure drop exceeds the manufacturer's threshold — typically 1,500–2,500 Pa depending on filter type.

Metal Contamination in Output Sand

Root Cause

Magnetic separator not working. Either the magnets have lost strength (rare — permanent magnets last 10–15 years, electromagnets last indefinitely if powered properly) or metal buildup on the magnet surface is preventing new particles from being captured.

Immediate Fix

Clean the magnet surface daily — scrape off accumulated metal particles. If cleaning doesn't restore separation effectiveness, check magnet strength with a gauss meter. It should read 1,200–1,800 gauss at the surface for permanent magnets.

Prevention

Daily magnet cleaning as part of routine maintenance.

Quick Reference: Key Diagnostic Thresholds

Pulse-Jet Air Pressure

0.6–0.8 MPa

Filter Pressure Drop Limit

1,500–2,500 Pa

Magnet Surface Strength

1,200–1,800 Gauss

Inconsistent Output Sand Quality

Usually caused by inconsistent input sand. If your casting operation varies — different alloys, different pouring temperatures, different cooling times before shakeout — the used sand entering reclamation has variable contamination and degradation levels. The reclamation system processes whatever you feed it; if input quality varies, output quality varies.

Fix

Either standardize your casting process (not always possible) or adjust reclamation parameters — mill speed, residence time, screen amplitude — based on input sand condition. High-volume systems with PLC control can automate this adjustment using feedback from output sand sensors.

When to Adjust Process Parameters

If output sand testing shows you're outside target ranges (grain size distribution, clay content, contamination levels) for more than one consecutive test, adjust the reclamation process:

  • Residual clay too high — Increase attrition mill speed or residence time
  • Too many fines in output — Increase screen amplitude or reduce feed rate
  • Metal contamination above target — Increase magnetic separator strength (if using electromagnets) or clean the magnet surface more frequently

Adjustment Protocol — Avoid Overcorrecting

Don't adjust parameters based on a single out-of-spec test — sand quality varies naturally, and one outlier doesn't indicate a process problem. Wait for two or three consecutive tests showing the same trend, then adjust.

Make one change at a time and monitor results for at least 4–8 hours before making another change — multiple simultaneous adjustments make it impossible to know which change had what effect.

Manufacturer Advantage

Why Foundries Choose TZFoundry Reclamation Systems

TZFoundry manufacturing facility producing clay sand reclamation systems across 15,000 square meters of production space

Building Clay Sand Reclamation Equipment Since 2010

We started with standalone attrition mills for domestic foundries and evolved into complete integrated systems for export buyers who need equipment that works together — without coordination headaches between multiple vendors.

A European foundry ordered one of our first complete reclamation lines in 2016. They needed 10 tons/hour capacity to match their molding output, and they wanted one supplier responsible for the entire system: mill, screens, magnetic separation, dust collection, conveyors, and controls.

That line is still running in their facility — same core equipment — processing 150+ tons per day with an 87% average reclamation rate.

In-House R&D — Custom Capacity Sizing & Integration Engineering

Our in-house R&D team handles custom capacity sizing and integration engineering without outsourcing to third-party design firms. When you need a non-standard throughput — say, 7 tons/hour instead of our standard 8–10 ton/hour mid-volume configuration — we're modifying our own designs: adjusting mill chamber size, screen deck area, and dust collection airflow to match your specific requirement.

This matters most when you're retrofitting reclamation into an existing foundry with space constraints or unusual sand characteristics.

Compact Footprint Builds

We've built systems that fit 10m × 7m floor spaces where the standard spec would call for 12m × 8m — engineered for foundries with real-world space constraints.

High-Silica Sand Configurations

Systems configured for high-silica sand that's more abrasive than standard molding sand — requires upgraded mill liner materials and more frequent maintenance intervals, but achieves the same reclamation rates.

Third-Party Audited Manufacturing

ISO 9001:2015 · CE · SGS

Our manufacturing process gets audited annually by third-party inspectors who verify we're following documented procedures for material sourcing, fabrication, assembly, and testing.

The certifications don't make the equipment run better — but they create a paper trail that satisfies your own quality audits and customer requirements if you're selling castings to buyers who require supplier traceability.

Every system shipment includes: material certificates, test reports, and calibration records — the full documentation package.

Production Capacity & Lead Time Stability

8 Production Lines
15,000 Sq. Meters Facility
500K Annual Units (Full Range)
45–60 Days Deposit to Departure

That capacity determines our lead time stability — we're not a job shop that gets backlogged when a large order comes in.

A typical reclamation system order consumes 3–4 weeks of production time across multiple lines (frame fabrication, machining, electrical assembly, testing).

We can run 3–4 systems in parallel, so even with a queue of orders, your lead time stays in the 45–60 day range from deposit to factory departure.

Flexible MOQ & Customization

No minimum order quantity for complete systems. We modify standard designs for non-standard requirements without charging engineering fees unless changes require new tooling or outside components.

No-Cost Customizations

  • Different motor voltages — 380V, 415V, 440V, 480V (specify during quotation)
  • Metric-to-imperial fastener conversions for imperial-unit maintenance teams
  • PLC interface language changes (English standard; other languages available)
  • Custom paint colors

Cost-Added Customizations

  • Non-standard throughput capacities (different mill sizes/screen areas) — adds 10–15% to base price
  • Stainless steel construction for corrosive environments (instead of carbon steel) — adds 30–40%
  • Integration with third-party control systems requiring custom communication protocols — adds $3,000–5,000 for programming and testing

Professional Export Experience

We handle documentation, shipping logistics, and customs coordination as part of standard service. Shipped to 40+ countries — we know which markets require specific certifications, what customs officials need on commercial invoices, and how to pack equipment to survive ocean freight without damage.

Market-Specific Certifications

  • CE for Europe
  • GOST for Russia
  • SASO for Saudi Arabia

Every System Ships With

  • English-language operations manual
  • Electrical schematics
  • Spare parts list with part numbers and supplier contacts
  • Maintenance schedule

Need documentation in another language? We arrange translation — adds 1–2 weeks to delivery, costs $400–600 depending on language and document length.

After-Sales Support

Remote troubleshooting via phone and email — we can diagnose 60–70% of issues without a site visit by walking through symptoms and process data with your operators.

Support Details

  • Spare parts stocked at our Qingdao facility — 5–7 day DHL/FedEx shipping to most export markets
  • On-site service available if remote support doesn't resolve the problem — you cover travel costs, we cover labor

Most buyers never need an on-site visit after initial commissioning. The combination of operator training, detailed documentation, and remote troubleshooting handles the majority of issues.

When We Send a Technician

Typically for major component replacement (motor swap, gearbox rebuild, mill liner installation if your team isn't comfortable doing it themselves) or capacity upgrades — not routine troubleshooting.

Learn More About TZFoundry

Explore our manufacturing capabilities, certifications, and how we've built foundry equipment systems for overseas buyers since 2010.

About Our Factory
From Inquiry to Commissioning

Getting Started — From Inquiry to Commissioning

Everything you need to prepare before requesting a quotation — sizing guidance, site preparation, utility requirements, and the details that prevent costly installation mistakes.

Information We Need for an Accurate Quotation

Providing complete project details upfront eliminates back-and-forth and ensures the first quotation reflects your actual requirements — not a generic estimate.

Current Molding Line Output

Molds per hour or tons of sand per day — this determines the minimum reclamation throughput.

Sand Type & Characteristics

Silica, chromite, olivine, or synthetic — this affects mill liner material selection and attrition parameters.

Available Floor Space

Length × width × ceiling height — needed to confirm equipment fit and maintenance access clearances.

Electrical Supply Specifications

Voltage, phase, and available amperage ��� critical for motor and control panel configuration.

New Facility or Retrofit?

Whether you're installing in a new facility or retrofitting into an existing foundry changes layout planning. If replacing an older reclamation system, tell us what's not working with your current setup — that helps us avoid specifying the same limitations.

Engineer reviewing reclamation system specifications checklist on foundry floor

The Most Common Mistake in Reclamation Sizing

Buyers calculate based on current molding output without accounting for future expansion. If you're planning to add molding capacity within the next 2–3 years, size the reclamation system for your future throughput, not your current throughput.

Oversizing by 20–30%

Adds 10–15% to the purchase price but gives you growth headroom without replacing equipment.

Under-sizing to Save 10–15%

Costs you 100% of the equipment price when you need to upgrade — a complete system replacement.

Site Preparation Requirements

Reclamation systems generate vibration from the attrition mill and screens, so you need a reinforced concrete slab at least 200mm thick with rebar reinforcement.

If you're installing on an upper floor, check your building's load rating — a mid-volume system weighs 8–10 tons fully loaded with sand, and dynamic loads during operation can spike to 1.3–1.5× static weight.

We provide foundation drawings with anchor bolt locations and load distribution maps as part of the pre-shipment documentation package.

Foundation Spec Summary

Reinforced concrete slab: ≥ 200mm thick with rebar

Mid-volume system loaded weight: 8–10 tons

Dynamic load factor: 1.3–1.5× static weight

Pre-shipment docs include: foundation drawings, anchor bolt locations, load distribution maps

Utility Requirements

Electrical Service

Electrical service needs to deliver the system's rated power plus 20% overhead for startup surge current. Most buyers install a dedicated circuit breaker for the reclamation line rather than tapping into existing foundry power — simplifies troubleshooting and prevents voltage sags from affecting other equipment.

Small-Volume

35–45 kW

+ 20% surge overhead

Mid-Volume

70–85 kW

+ 20% surge overhead

High-Volume

120–150 kW

+ 20% surge overhead

Compressed Air

Required if specifying pulse-jet dust collection:

  • › Supply pressure: 0.6–0.8 MPa
  • › Flow rate: 0.5–1.0 m³/min

Water Supply

Required if using water spray for dust suppression:

  • › Pressure: 0.2–0.3 MPa
  • › Flow rate: 10–20 liters/min

Ventilation Planning

The dust collection system exhausts 3,000–12,000 cubic meters per hour of air depending on system capacity. How you handle this exhaust air has significant implications for facility climate control and regulatory compliance.

Return Air to Facility

Common in cold climates to avoid heating losses. Verify your facility's makeup air system can supply the equivalent volume of the exhaust — 3,000–12,000 m³/hr depending on system size.

Exhaust to Atmosphere

May require a discharge stack extending above your roof line to meet local air quality regulations. Check regional environmental requirements before finalizing ductwork routing.

Shipping & Installation Timeline

45–60d

Production — From deposit to factory departure

20–35d

Ocean Freight — Depends on destination port

  • Middle East: ~20 days
  • Europe: ~25 days
  • North/South America: 30–35 days
3–7d

Customs Clearance & Inland Transport

3–5d

On-Site Assembly

2–3d

Commissioning & Operator Training

Total: 75–110 days from order to first production run

Need faster delivery? Air freight is possible for small-volume systems only — equipment breaks down into pieces small enough for air cargo. Cuts shipping time to 5–7 days but costs 5–6× more than ocean freight.

Training & Documentation

We provide 2–3 days of on-site training during commissioning, covering:

Startup procedures
Normal operation
Parameter adjustment (mill speed, screen amplitude, dust collector settings)
Routine maintenance (lubrication, inspection, consumable replacement)
Basic troubleshooting (how to diagnose common problems and when to call for technical support)

Hands-on approach: Your operators run the equipment under our technician's supervision until they're comfortable with all normal and exception scenarios.

Documentation Package

Operations Manual

80–120 pages — system description, operating procedures, maintenance schedules, troubleshooting guides

Electrical Schematics

Single-line diagrams, control circuit diagrams, terminal connection tables

PLC Program Backup

If your system includes PLC control

Spare Parts Catalog

Part numbers and supplier contacts

Maintenance Schedule

Daily, weekly, monthly, quarterly tasks with estimated time requirements

All documents ship in English. Other languages available on request — $400–600 additional cost for translation depending on language.

TZFoundry technician conducting hands-on operator training during clay sand reclamation line commissioning

Our commissioning engineers stay on-site through the full training cycle, ensuring your team is confident with every operating and maintenance scenario before sign-off.

After-Sales Support Structure

Remote Troubleshooting

Phone and email support for reported problems — inconsistent reclamation rate, throughput drop, unusual noise or vibration. We ask for symptoms and recent operating history, then guide you through diagnostic steps to identify the root cause.

Response Times

  • During China business hours (UTC+8): 4–8 hours
  • Outside that window: 12–24 hours
  • Urgent production-affecting issues: Contact via WhatsApp at +86 13335029477 — reaches our technical team directly

Spare Parts Ordering

Email or WhatsApp with the part description or part number from your spare parts catalog. We quote price and lead time within 24 hours, usually ship within 2–3 business days via DHL or FedEx (5–7 day delivery to most export markets).

Recommendation: For high-wear items (mill liners, screen meshes, dust filters), order 2–3 sets at once to reduce per-unit shipping cost and ensure you have spares on hand.

TZFoundry technical support team providing remote troubleshooting assistance for clay sand reclamation equipment

Quick Support Contacts

WhatsApp (Urgent)

+86 13335029477

Email / Parts Orders

Email or WhatsApp with part number

Parts Shipping

DHL / FedEx — 5–7 days

On-Site Service

When remote troubleshooting doesn't resolve the issue

If remote troubleshooting doesn't resolve the problem, we send a technician to your facility. Typical on-site service visit: 3–5 days including travel time, diagnostic work, repair or component replacement, and verification testing.

Cost Split

You cover: Travel costs (airfare, visa, accommodation, local transport)

We cover: Labor and technical expertise

Most Buyers Never Need On-Site Service

60–70%

Resolved by remote support

30–40%

Handled by your maintenance team with our guidance (bearing replacement, belt changes, sensor calibration)

Ready to Reduce Your Sand Costs?

Contact us at sales@tzfoundry.com with your molding output, sand processing volume, and available floor space. Include photos of your existing foundry layout if you're retrofitting reclamation into current operations — helps us spot potential installation issues before we finalize the quotation.

We'll respond within 24 hours with preliminary system recommendations and pricing, followed by a detailed proposal within 3–5 business days after we've clarified technical requirements.

Email Your Requirements Back to Clay Sand Lines

What Your Proposal Includes

  • System configuration matched to your capacity
  • Capacity specifications & performance guarantees
  • Footprint and utility requirements
  • Itemized pricing with no hidden costs
  • Lead time & installation schedule
  • ROI projections based on your sand costs and disposal fees

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