Drying machine used in building material, metallurgy, chemical industuy, cement to dry the slag, limestone, coal powder ... demand rotary dryer: Drier is a kind of machine with a rotating cylinde which is a little ... slag, clay, limestone, It is mainly used for cement, chemical, metallurgical, building materials industries. Its advantages are ... -243-52.5930-55147.8 Drying machine which is popular in cement