Why Do Many Foundries Still Purchase Large Quantities of New Sand?

No-bake resin sand is widely used because it provides:

• Excellent mold strength
• High dimensional accuracy
• Superior casting surface finish
• Flexible production for medium and large castings

However, after shakeout, the sand is covered with hardened resin films and bonded into large agglomerates.

Many foundries mistakenly believe this material has reached the end of its service life.

In reality, more than 90% of the silica sand can often be reused when it passes through a properly designed secondary reclamation process.

Without secondary reclamation, foundries commonly face:

• High new silica sand purchases
• Increased resin binder consumption
• Excessive landfill and disposal costs
• Higher energy consumption
• Unstable mold quality
• Poor casting consistency

Foundry Secondary Sand Reclamation Machine transforms used no-bake resin sand into clean, reusable molding sand, reducing production costs while improving sustainability.

What Is a Foundry Secondary Sand Reclamation Machine?

Secondary Sand Reclamation Machine is the core equipment in a no-bake resin sand recycling system.

Recover More Resin Sand, Reduce Foundry Costs, and Improve Casting Quality with High-Efficiency Secondary Sand Reclamation Technology

After the primary crushing stage, the machine uses high-speed mechanical attrition to remove the thin resin film remaining on each sand grain.

Unlike conventional crushers, it does not simply reduce particle size.

Instead, it:

• Removes residual binder films
• Separates adhered particles
• Preserves silica sand integrity
• Produces high-quality reclaimed sand
• Improves downstream molding performance

This process is essential for achieving high reclaimed sand utilization in modern foundries.

Why Secondary Reclamation Is Critical

Primary crushing breaks large sand lumps, but it cannot completely remove bonded resin from the sand surface.

Residual binder can lead to:

Lower Mold Strength

Excessive residual resin reduces bonding consistency.

Increased Gas Defects

Residual organic binder may generate gases during pouring, causing:

• Blowholes
• Gas porosity
• Pinholes

Higher Binder Consumption

Dirty reclaimed sand requires additional fresh resin and catalyst.

Poor Surface Finish

Residual contaminants reduce casting appearance and dimensional consistency.

Secondary reclamation eliminates these issues and restores the sand to a reusable condition.

How the Secondary Sand Reclamation Machine Works

Step 1 – Feed Crushed Resin Sand

Material enters the attrition chamber from:

• Resin Sand Crushing Machine
• Vibratory Shakeout Machine
• Return Sand Conveyor

Step 2 – High-Speed Attrition

A high-speed rotor creates intensive friction between sand grains.

This mechanical scrubbing removes:

• Residual resin films
• Carbon deposits
• Fine contaminants

while protecting the silica particles.

Step 3 – Dust Extraction

Separated resin powder and fines are immediately collected by a pulse jet dust collector, ensuring a cleaner working environment and improving reclaimed sand purity.

Step 4 – Screening and Cooling

The reclaimed sand is transferred to:

• Fine Hexagonal Screen
• Fluidized Sand Cooling Bed
• Storage Hopper
• Sand Mixer

before being reused in mold production.

Technical Specifications

Actual performance depends on binder type, sand quality, and complete reclamation process.

Key Advantages

1. Increase Sand Recovery Rate

Efficient mechanical attrition enables reclaimed sand utilization of 90–98%, significantly reducing fresh silica sand purchases.

2. Lower Production Costs

Cleaner reclaimed sand reduces:

• New sand consumption
• Resin binder usage
• Catalyst consumption
• Waste disposal costs

This shortens the return on investment for the entire reclamation line.

3. Improve Casting Quality

High-quality reclaimed sand provides:

• Stable mold strength
• Better permeability
• Improved dimensional accuracy
• Smoother casting surfaces
• Lower defect rates

4. Protect Downstream Equipment

Uniform, cleaned sand minimizes wear on:

• Sand Mixers
• Conveyors
• Storage Silos
• Molding Machines

leading to lower maintenance costs.

5. Support Green Foundry Manufacturing

A complete no-bake sand recycling system helps foundries:

• Reduce landfill waste
• Lower CO₂ emissions
• Improve resource efficiency
• Meet environmental compliance requirements

Typical Applications

Our Secondary Sand Reclamation Machine is ideal for:

• Steel Casting Foundries
• Iron Foundries
• Heavy Machinery Manufacturers
• Valve & Pump Foundries
• Wind Power Casting Plants
• Mining Equipment Foundries
• Engineering Machinery Components
• Rail Transit Casting Production

Secondary Sand Reclaimer vs Conventional Reclaimer

Common Problems Solved

Excessive Residual Resin

Solution: High-speed mechanical attrition removes bonded resin films effectively.

High Fresh Sand Consumption

Solution: Increased reclaimed sand utilization reduces raw material costs.

Poor Mold Quality

Solution: Cleaner sand improves mold strength and stability.

Frequent Equipment Wear

Solution: Uniform reclaimed sand reduces abrasion in downstream equipment.

Why Choose Our Secondary Sand Reclamation Machine?

Advanced Attrition Technology

Optimized rotor geometry provides high cleaning efficiency with minimal sand grain damage.

Heavy-Duty Construction

Manufactured using:

• High-chromium wear-resistant liners
• Alloy steel rotors
• Heat-treated shafts

for long service life under continuous operation.

Intelligent Automation

Optional PLC control includes:

• Automatic load adjustment
• Real-time monitoring
• Fault diagnosis
• Production statistics
• Remote maintenance

Turnkey Engineering Services

We provide:

• Process evaluation
• Capacity calculation
• Equipment selection
• Plant layout
• Installation supervision
• Commissioning
• Operator training
• Lifetime technical support

Frequently Asked Questions

Which resin systems can be processed?

The machine is suitable for:

• Furan resin
• Phenolic resin
• Alkaline phenolic resin
• Other no-bake resin bonded sands

Can it be integrated into an existing reclamation line?

Yes. It integrates easily with:

• Resin Sand Crushing Machines
• Shakeout Machines
• Cooling Beds
• Fine Hexagonal Screens
• Dust Collection Systems
• Continuous Sand Mixers

Does the machine damage silica sand?

No. The attrition process removes resin films while preserving the original sand grain structure, ensuring excellent reclaimed sand quality.

What sand recovery rate can be achieved?

A complete reclamation system typically enables 90–98% reclaimed sand utilization, depending on resin type, casting process, and operating conditions.

Increase Profitability with High-Quality Sand Reclamation

Every ton of reclaimed no-bake resin sand represents direct savings in:

• Raw materials
• Resin binders
• Waste disposal
• Transportation
• Energy consumption

A Foundry Secondary Sand Reclamation Machine helps transform used sand into a valuable production resource, improving both profitability and environmental performance.

Request Your Customized Sand Reclamation Solution Today

Looking for a reliable Foundry Secondary Sand Reclamation Machine for No-Bake Resin Sand Recovery?

Our engineering specialists provide:

Free Engineering Support

✔ Resin sand analysis

✔ Capacity matching

✔ Equipment selection

✔ Process optimization

✔ Factory layout design

✔ ROI evaluation

Contact Us Today For:

✔ Detailed Technical Proposal

✔ Factory Direct Quotation

✔ Complete Resin Sand Recycling Line

✔ Turnkey Foundry Engineering Solution

✔ Installation & Commissioning Guidance

Simply send us:

• Annual casting output
• Resin binder type
• Existing reclamation process
• Required processing capacity
• Plant layout drawings

Our engineering team will prepare a customized proposal and quotation within 24 hours.