Four-roller crusher is very similar to two-roller crusher. The difference is that the crusher has two pairs of rolls which are arranged one above the other. The upper pair of rolls produces a pre-crush and the lower with a smaller gap between the rolls produces the final crush. Crushers rolls can be smooth, corrugated, ribbed, long- or short- serrated.
In the mining industry four-roller crushers are used for crushing the fuel (coke, coal). These crushers can be used for crushing building materials, slags, glass, refractory materials, waste molding compounds, etc.
Four- roller crusher consists of such main parts:
The main benefits and features of four-roller crusher: