... ore, coal, gold, copper, corundum, bauxite, silica, etc.Working process: Materials fall from the upper part of the machine to impeller ... the dry way about the lubricating oil. When the machine works certain times, open the main bearing and clean it ... ball mill, Rod Mill, Belt Conveyor, Vibrating Screen, Flotation Machine, Magnetic Separator, Shaking Table, Agitation Vat, Spiral Chute, Spiral ...