Quartz stone hydrulic double roll crusher machine 

Sand making stone double roller crusher machine The hydraulic double roller crusher is widely used for secondary and fine crushing in the industry of mining, building materials, chemical industry, metallurgy and so on. It uses the hydraulic system to adjust the roller distance to produce different sand sizes. The hydraulic system can also help to protect the roller surface from being damaged by the iron.  It can crush materials in middle hardness such as rocks, ore, coke, lump coal, slag, glass, mineral slag, cement clinker, fireproof materials, and so on. Roller crusher working principle The crushed stone materials fall between two rollers through the feeding port for crushing, and the finished materials fall naturally. In case of hard or unbreakable materials, the roller can automatically retreat by the action of a hydraulic cylinder or spring, so as to increase the roller clearance and drop the hard or unbreakable materials, which can protect th…