... used for grinding middle hard ores such as iron ore, aluminum ore, gritstone, gypsum, blast furnace slag, coal gangue, ... phosphorus ore, and lump coal. Also, it can be used in the field of building materials, mining industry, metallurgy, ... such as stone, granite, trap rock, coke, coal, manganese ore, iron ore, emery, fused aluminum, oxide, fused calcium carbide, limestone, quartzite ...