... to suppress coal , iron , coke , aluminum powder, iron , iron oxide skin, toner , toner , slag , gypsum, tailings , sludge , kaolin , activated ... Effectively improve the life of a roll3. working principle of dry powder ball press machine; This series of Pressure Ball machine will pass ... the local materials, such as coke, iron skin, dust powder effects of sludge and other materials is very obvious. Our ...