... fine adjustment, even grain size, easily controlled chemical composition, low noise, less dust, less metal abrasion, easy operation, ... to grind calcite, electrolytic stone, talc, kaolin, manganese ore, rock phosphate, gypsum, zircon, silicon metal, etc.2.Working Principle:The ... is 50SiMn.5. Less environmental pollution: There is low vibration and low noise for vertical milling machine. The whole system ...