... dry slag, clay, limestone, It is mainly used for cement, chemical, metallurgical, building materials industries. Its ... Indirect heat transfer Rotary dryer: It is used for drying materials with humidity or granularity in the ... metallurgy and chemical. Rotating dryer can be used for drying many kinds of materials and with convenient ... 52104.9 Clay Dryer, rotary dryer for sand, wood chips,gypsum, sawdust