... rotary drum dryer 1>lower erengy consumption 2>.environment protection 3>.easy operation 4>.high efficiency and qualified 2012 hot selling Durable rotary ... for drying of limestone slag, coal powder, slag, clay stone. 1. The industry: Coal slime, coal, flotation clean coal, mixed ... . Chemical industry: Non-drying heat sensitive materials.technical parameters: 2012 hot selling Durable rotary drum dryer