The jaw crusher has the advantages of reliable operation, simple maintenance, low operation cost and adjustable size of discharging material. According to the number of jaws, it can be divided into two-roll crusher and four-roll crusher. It can be widely used in the processing of brittle and tough materials in cement, metallurgy, chemical industry, electric power, coal and other industries. Roller crusher is used for crushing and fine crushing of ores and rocks below medium hardness in mineral processing, chemical, cement, building materials and other industrial sectors.

1. To strengthen the work of iron removal for ore feeding, the crusher will be damaged if the non-crushed material falls between the jaws, resulting in parking accident. Therefore, the iron removal device should be installed before the crusher.

2. Viscous materials are easy to block the breaking space. In dealing with the blockage fault, the stoppage should be handled, and the mining should not be carried out in operation.

3. When the treated materials contain large blocks, it should be noted that large blocks of ore are easily squeezed out of the crushing space to prevent injury or damage to equipment.