Why Secondary Sand Reclamation Matters More Than Primary Crushing

Many foundries already use:

• Resin sand crushing machines
• Shakeout systems
• Sand cooling equipment

Yet they still experience:

❌ High Loss on Ignition (LOI)

❌ Poor reclaimed sand quality

❌ Excessive new sand consumption

❌ High resin binder costs

❌ Casting defects caused by residual binder

The reason is simple.

Primary crushing only breaks hardened sand lumps.

It does not completely remove the residual resin film attached to the silica sand grains.

That is the job of the Secondary Resin Sand Reclamation Machine.

Without efficient secondary reclamation, even the best crushing system cannot produce high-quality reclaimed sand.

What Is a Secondary Resin Sand Reclamation Machine?

Secondary Resin Sand Reclamation Machine is a high-efficiency mechanical scrubbing system designed to remove cured resin films from reclaimed silica sand after the primary crushing stage.

Using controlled mechanical friction between sand particles, the machine removes residual binder while minimizing damage to the original silica grains.

The result is reclaimed sand that closely matches the quality of new sand and is ready for reuse in new molds and cores.

It is an essential piece of equipment in modern:

• Resin bonded sand recycling systems
• No-bake sand reclamation plants
• Furan sand recovery lines
• Phenolic resin sand processing systems

Why Secondary Reclamation Is Critical

The objective of secondary reclamation is not to crush sand.

Its objective is to clean every sand grain.

Residual resin left on the sand surface causes:

Higher Binder Consumption

Old resin reduces the bonding performance of new resin.

Poor Mold Strength

Residual coatings weaken bonding between fresh resin and reclaimed sand.

Increased Casting Defects

Dirty reclaimed sand contributes to:

• Gas porosity
• Blowholes
• Sand inclusions
• Rough casting surfaces

Higher Production Costs

Poor reclaimed sand forces foundries to purchase more new silica sand.

Secondary reclamation directly addresses these issues.

Working Principle of the Secondary Resin Sand Reclamation Machine

Step 1 — Uniform Material Feeding

Pre-crushed resin sand enters the reclamation chamber through a controlled feeding system.

Step 2 — Mechanical Friction Reclamation

High-speed rotating blades generate controlled friction between sand particles.

Unlike crushing, the process removes resin films without breaking silica grains.

The friction separates:

• Residual resin
• Burnt binder
• Fine impurities
• Surface contamination

Step 3 — Air Classification

The loosened resin dust and fine particles are extracted through the dust collection system.

This produces cleaner reclaimed sand with lower LOI values.

Step 4 — Particle Conditioning

Uniform, clean silica sand is discharged for:

• Screening
• Cooling
• Storage
• Sand mixing

before returning to production.

Technical Parameters

Performance depends on sand type, binder system, and operating conditions.

Key Advantages

1. Improve Reclaimed Sand Quality

Mechanical friction removes residual binder while preserving silica grain shape.

Benefits include:

✔ Lower Loss on Ignition (LOI)

✔ Cleaner sand surface

✔ Better bonding performance

2. Increase Sand Recovery Rate

High-quality reclaimed sand allows foundries to replace more new silica sand.

Many plants achieve:

85–95% reclaimed sand utilization

depending on the casting process and binder system.

3. Reduce Resin Binder Consumption

Cleaner reclaimed sand requires less fresh resin to achieve the same mold strength.

Many customers report noticeable reductions in binder usage after upgrading their reclamation system.

4. Improve Casting Quality

Clean reclaimed sand contributes to:

• Higher mold strength
• Better core quality
• Improved surface finish
• Lower scrap rates
• More stable dimensional accuracy

5. Lower Total Production Costs

Reduced consumption of:

• New silica sand
• Resin binder
• Waste disposal
• Transportation

creates significant long-term savings.

Typical Applications

Our Secondary Resin Sand Reclamation Machine is widely used in:

Steel Casting Foundries

Recovering large volumes of resin bonded sand.

Iron Foundries

Improving reclaimed sand quality for no-bake molding.

Valve & Pump Foundries

Producing high-quality cores and molds.

Wind Power Component Manufacturers

Supporting continuous resin sand recycling.

Heavy Equipment Foundries

Reducing production costs while maintaining stable casting quality.

Secondary Reclaimer vs Conventional Sand Cleaner

Common Foundry Problems Solved

High Loss on Ignition (LOI)

Solution: Mechanical friction removes cured resin films effectively.

Poor Mold Strength

Solution: Cleaner sand improves resin bonding.

High New Sand Consumption

Solution: Better reclaimed sand increases reuse rates.

Excessive Casting Defects

Solution: Cleaner molding sand reduces gas-related and surface defects.

Why Choose Us as Your Factory Direct Manufacturer?

More Than 20 Years of Foundry Equipment Experience

We specialize in complete foundry sand processing and reclamation systems.

Heavy-Duty Wear-Resistant Design

Key wear components are manufactured from:

• High-chromium alloy
• Heat-treated steel
• Replaceable liners

ensuring long service life.

Intelligent PLC Automation

Optional features include:

• Automatic load monitoring
• Speed adjustment
• Fault diagnosis
• Production statistics
• Remote maintenance support

Complete Turnkey Engineering

We provide:

• Process design
• Capacity calculation
• Plant layout
• Equipment manufacturing
• Installation supervision
• Commissioning
• Operator training

Factory Direct Supply

Working directly with the manufacturer means:

• Competitive pricing
• Faster delivery
• Technical customization
• Reliable after-sales support
• Genuine spare parts

Frequently Asked Questions

Which binder systems are supported?

Suitable for:

• Furan resin
• Phenolic resin
• Alkaline phenolic resin
• No-bake resin bonded sand

Can the machine be integrated into an existing reclamation line?

Yes.

It is commonly installed after:

• Resin sand crushing machines
• Shakeout machines

and before:

• Cooling systems
• Screening equipment
• Sand storage silos

Will the machine damage silica sand?

No.

The friction process is designed to remove resin films while maintaining the original sand grain structure.

What reclaimed sand quality can be achieved?

When integrated into a complete recycling system, reclaimed sand quality can approach that of new silica sand, depending on binder type and process conditions.

Upgrade Your Resin Sand Recycling System for Higher ROI

If your foundry is still relying only on primary crushing, you are leaving valuable sand recovery potential untapped.

A High-Efficiency Secondary Resin Sand Reclamation Machine enables you to:

• Recover more usable sand
• Reduce binder consumption
• Improve casting quality
• Lower operating costs
• Meet sustainability goals

For modern foundries, secondary reclamation is not an option—it is a key step toward efficient and profitable production.

Request Your Customized Resin Sand Recycling Solution

Looking for a reliable Secondary Resin Sand Reclamation Machine from a factory direct manufacturer?

Our engineering team provides:

Free Technical Consultation

✔ Resin sand analysis

✔ Reclamation efficiency evaluation

✔ Capacity calculation

✔ Equipment selection

✔ Plant layout optimization

✔ Energy consumption assessment

Contact Us Today For:

✔ Detailed Technical Proposal

✔ Factory Direct Quotation

✔ Complete Resin Sand Recycling Line Design

✔ Turnkey Engineering Solution

✔ Installation & Commissioning Support

Simply send us:

• Annual casting capacity
• Binder type
• Current sand reclamation process
• Required throughput
• Workshop layout

Our engineers will prepare a customized solution and competitive quotation within 24 hours.