... so on. It can dry slag, coal powder, mining powder, clay, sand, limestone and so on. ... It is made into rotary body, lifting blade, driving device, supporting device etc. The dryer ... ,Working Theory of Rotary slag dryerRotary slag dryer consist of a horizontally inclined rotating cylinder. ... used in drying Slag,Sand,Coal,Iron Powder,Ore,Quartz Sand,Clay and so on ...