Metal scrap processing FAQ

Metal chip processing reduces waste volume, reclaims fluids, and improves safety and compliance.

Key Benefits of PRAB Metal Chip Processing Systems:

• Reduces chip volume by up to 90%
• Recovers up to 98% of cutting fluids
• Lowers hauling and disposal costs
• Improves shop cleanliness and worker safety
• Enhances compliance with ISO 14001 and EPA guidelines

Q. Can PRAB systems manage swarf and sludge?

A: Yes. PRAB’s centrifuges and wringers effectively separate coolant and fluids from fine particles and coolant-soaked swarf and metal scrap.

PRAB systems are trusted by leaders in automotive, aerospace, energy, electronics, defense, heavy equipment, and medical device sectors.

We serve metalworking manufacturers using CNC machining, die casting, stamping, forging, finishing, and fabrication operations that manage metal scrap, cutting fluids, process water, and Industrial wastewater treatment.

Find industry-specific solutions ➜

The most effective coolant filtration methods include magnetic separation, paper bed filtration, and membrane-based systems. Each approach targets different types of contaminants to extend coolant life, improve surface finish, and reduce tool wear.

• Magnetic separators capture ferrous solids and fines.
• Paper bed filters are effective for removing larger chips and non-ferrous solids.
• Membrane systems (such as ultrafiltration) remove fine particulates and emulsified oils.

The right choice depends on the coolant type, machining process, and contaminant load. In many cases, facilities combine multiple technologies for optimal performance and compliance with discharge regulations.

PRAB Fluid Filtration and Coolant Recycling Systems are engineered for CNC machining, metal cutting, and grinding operations. With solutions that include magnetic separators, paper bed filters, vacuum filters, and ultrafiltration units, PRAB helps manufacturers lower coolant costs, reduce downtime, and meet environmental standards.

White Paper: Extending Tool Life Through Effective Fluid Management

Case Study: Aerospace Components Manufacturer Turns Waste into Revenue

• Benefits:
  • Magnetic separators remove ferrous particles before fine filtration
  • Paper bed filters handle solids and fines at lower flow rates
  • Vacuum filtration is ideal for grinding and honing operations
  • Centrifuges separate solids using high-speed rotation
  • Membrane filtration removes sub-micron particles and tramp oils

Q: Which method is best for high-precision machining?

A: Membrane and vacuum filtration systems are ideal for removing sub-micron particulates in precision processes.

Q: How often should filters be replaced?

A: This depends on the system design and contaminant load. Some systems include auto-monitoring to optimize replacement intervals.

Choose a metal scrap conveyor supplier that offers documented performance guarantees, preventive maintenance programs, and long-term parts availability.

Every PRAB conveyor is backed by the Performantee® Guarantee—verifying ROI through lab testing and throughput verification before shipment. PRAB also offers a Managed Maintenance Program, which, in one machining operation, reduced unplanned downtime by 40% over 18 months through scheduled inspections, OEM parts, and 24/7 technical support.

Resources:

• Technical Brief: The PRAB Difference
• Technical Brief: Managed Maintenance Program

Ultrafiltration systems use semi-permeable membranes to separate suspended solids, emulsified oils, and fine particulates.

This process extends the life of wash water, reduces chemical use, and creates a consistent effluent stream that can be safely reused in manufacturing processes or discharged in compliance with environmental regulations.

PRAB Highlight:
PRAB’s crossflow UF systems are engineered for minimal fouling and maintenance, achieving up to 75% detergent savings and 90% haul-away cost reductions. They integrate easily with PRAB RO or evaporation systems for maximum reuse potential.

Learn About PRAB UF Systems

• Case Study: Eaton saves $196K/year with washer cleaner
• White Paper: Getting the Most Value from Metal Scrap and Spent Fluids
• Maintenance Consideration: Setting the Groundwork for Equipment Performance & Return

Most conveyor equipment in the market is designed for shorter service cycles, often 10–15 years.

PRAB metal scrap conveyors consistently deliver double the lifespan while handling the toughest materials.

• Some of the options include Steel Belt Conveyors, Oscillating Conveyors, Pivot Belt Conveyors, Drag Chain Conveyors, Magnetic Conveyors, and Roller Bucket Conveyors.
• Designed for abrasive, hot, and coolant-heavy scrap from CNC machining, stamping, and foundry operations.
• Built with long-life wear components and engineered for uptime.
• Backed by U.S. engineering, testing, and service support.

👉 Learn more: PRAB Conveyors

Yes. PRAB provides equipment to integrate into your existing systems as well as turnkey metal chip processing and coolant recycling systems that deliver unmatched efficiency and cost savings:

• Briquetters, wringers/centrifuges, crushers, shredders, and conveyors designed to work together in closed-loop recovery.
• Up to 98% cutting fluid reclamation, reducing coolant purchases by 70%+.
• Densification that increases scrap value by up to 25%.
• ROI achieved in 12–18 months on most installations.

👉 Explore: Chip Processing Equipment

PRAB coolant recycling and fluid filtration systems extend fluid life while lowering costs and improving safety:

• Magnetic separators, paper bed filters, candle filters, and Guardian® systems remove tramp oils, solids, and fines.
• Reduce disposal costs by up to 80–90%.
• Improve worker safety, machine uptime, and regulatory compliance.
• Scalable, modular filtration solutions tailored to each facility.

👉 Learn more: Fluid Filtration Systems

PRAB offers industrial wastewater treatment systems that minimize operating costs and meet strict discharge regulations:

• Ultrafiltration (UF) for suspended solids, oils, and emulsions.
• Reverse Osmosis (RO) for high-purity water reuse.
• Vacuum evaporation/distillation for waste volume reduction.
• Automated pH adjustment systems for compliance with local limits.
• Oil-water separators, UV disinfection, and ozone polishing for complete treatment.

👉 Explore: Water & Wastewater Treatment

Yes. PRAB offers on-site assessments and material testing to tailor solutions to your facility’s needs.

• Custom-engineered systems are sized for scrap volume, coolant type, and plant layout.
• In-house automation and controls ensure seamless integration into existing production lines.
• Rely on our Performantee and material testing to ensure that PRAB solutions meet your specific needs.
• Support includes installation, training, and long-term service.

👉 Request: Free Material Testing

It’s best to select a Briquetter model based on the profile of your metal alloys and your manufacturing process.

PRAB engineers will size the system using your mass flow, chip geometry, metal alloy, inlet moisture, and target puck size—then confirm with lab data.

→ Next Step: Request a FREE Briquetting lab test