Coal gangue is solid waste discharged in the process of coal mining and coal washing. It is a dark gray rock with low carbon content, harder than coal, and associated with coal seam in the process of coal formation.

Coal gangue can be used to make sand, and grinding coal gangue to make sand can improve its utilization rate. , can be used for sand in construction sites. Sand making machines are widely used in large-scale, smelting, building materials, highways, railways, water conservancy and chemical industries.

Coarse crushing: Coal gangue raw materials enter the vibrating feeder through the silo under the condition of more than ten centimeters and large particles, and are coarse crushed through crushing.

Medium-fine crushing: the finished product after coarse crushing is screened by vibrating screen, transported to reverse crushing and subjected to medium-fine crushing. Those who pass the screening will enter the next process, and those who fail will return to crushing.

Fine crushing: the medium and fine materials enter the third sand making machine for setting, output 5mm, and then enter the sand washing machine for cleaning.

flow chart