Combined Attrition & Screening Of No-Bake Sand, Green Sand & Core Butts
Carrier attrition mills, also known as lump breakers, combine the technologies of attrition and screening of No-Bake sand, green sand lumps, or core butts into a single unit.
The attrition mill reduces sand lumps to grain size and removes tramp metal. Carrier’s heavy-duty attrition mills are designed for reliable use and low maintenance requirements and utilize a unique pneumatic gate that discharges metallics without shutting down.
Features & benefits of Carrier attrition mills/lump breakers:
- Removes tramp metal from the sand system.
- The scrubbing process reduces the LOI of chemically bonded sand.
- Replaceable wear liners for low maintenance.
- Heavy duty, natural frequency attrition mill design reduces noise and energy consumption.
- Automatic attrition discharge gate prevents tramp metal overload without stopping unit.
- Isolated-base design reduces dynamic reactions transmitted to supports or foundation.
- Heated lower deck to prevent sand from sticking.
- Direct drive.
- Easy installation, low maintenance, and minimum downtime.
Lump Breaker FAQs
What applications benefit from a lump breaker?
Lump breakers reduce agglomerated or clumped bulk solids to free-flowing material, ideal before feeding, drying, or conveying.
How do lump breakers protect downstream equipment?
By preconditioning material to a consistent size, lump breakers reduce surges, blockages, and wear on conveyors, feeders, and screens.
Can lump breakers handle abrasive or moist materials?
Yes, with the correct rotor and liner configurations, they effectively handle abrasive and slightly cohesive materials.
How do I choose the right lump breaker configuration?
Carrier engineers consider material size, hardness, and moisture content to recommend rotor geometry and operating speed.
What maintenance is expected with lump breakers?
Maintenance primarily involves inspecting and replacing rotor tips and wear liners—periodic and predictable, not reactive.