... operate and maintain 3.with bv ce certificate 4.accept L/C Direct Factory Price Coal Powder Briquette Machine Environmentlly And ... item is mainly used to suppress pulverized coal, iron powder, coke, aluminum powder, scrap iron, iron oxide skin, toner, toner, slag, gypsum, tailings, ... Raw material size should be within 80-200meshes, and no iron or stones can be feed in2. Prohibit heavy-duty start ...