Q: What is the working principle of a double roll crusher?
double roll crusher
A double roll crusher uses two counter‑rotating wear‑resistant rolls to crush material by compression. Material enters the V‑shaped crushing chamber between the two rolls from above and is subjected to continuous high‑pressure compression and shearing forces. Through squeezing, shearing, and grinding, the material is progressively crushed to the required particle size and then discharged by conveying equipment.
This crushing method is known as interparticle bed crushing – the material is primarily fractured under pressure rather than being shattered by impact. The relatively gentle crushing force causes the material to break along natural cleavage planes or mineral boundaries, resulting in low over‑crushing and uniform product size. The reduction ratio is typically high.
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