... 30% 2)Improve fineness of discharging 3) ISO:9001:2008 Product DescriptionUsage: Ball mill is the key equipment for ... used in the manufacture industries, such as cement, silicate, new building material, refractory material, fertilizer, ferrous metal, nonferrous ... used in powder-making production line including cement, silicate, new-type building material, refractory material, fertilizer, ore dressing ...