... to dry slag, clay, limestone, It is mainly used for cement, chemical, metallurgical, building materials industries. Its advantages ... building material, metallurgy and chemical. Rotating dryer can be used for drying many kinds of materials and with ... , Zhengzhou City, Henan Province, China. // sludge rotary drum dryer /* sludge rotary drum dryer with CE and ISO9001:2008 Certificate(capacity of 0.5 ...