... is widely used in mining, gravel field, metallurgy, building materials, chemical industry, mineral processing, coal mining and other ... material.(3)Work environment: Belt conveyor, belt conveyor for conveying bulk density of less than 1.67 / ... powder, granular, small block of low-abrasive materials and bags of materials, such as coal, gravel, sand, cement, ... 2.0 200-400 belt conveyor for iron ore