Roll Crusher FAQ: Everything You Need to Know

DOUBLE ROLL CRUSHER

Q: What is a roll crusher?

A roll crusher is a compression crushing machine that uses two counter-rotating cylindrical rolls to crush material. It is primarily used for medium and fine crushing in mineral processing, producing uniform particles with minimal fines.

Q: How does a roll crusher work?

Material is fed into the gap between two counter-rotating rolls. As the rolls turn toward each other, material is drawn into the narrowing gap and broken under compressive pressure. Particles larger than the roll gap cannot pass through, naturally ensuring uniform output size.

Q: What materials can a roll crusher process?

Roll crushers handle a wide range of materials, including:

• Gold ore — quartz vein, oxidized, sulfide concentrate

• Nickel ore — laterite (high clay/moisture), sulfide

• Copper, iron, lithium, manganese, chromite, PGM ores

• Industrial minerals — limestone, quartz sand, fluorite, barite

• Coal and coke

  

  ROLL CRUSHER

Q: Can a roll crusher handle hard rocks like quartz?

Yes. Hard but brittle materials like quartz vein gold ore (Mohs 7) fracture efficiently under compression. High-chromium hardfaced roll surfaces provide excellent wear resistance for abrasive ores.

Q: Can a roll crusher handle wet, sticky, or clay-rich material?

Yes — this is one of its greatest advantages. With no enclosed crushing chamber or grate bars, sticky material is forced through between the rolls without clogging. Automatic scrapers keep roll surfaces clean. Proven performance in laterite nickel ore with 30–50% clay and up to 45% moisture.

What is the difference between smooth rolls and toothed rolls?