... dryers are two kinds,one is one drum rotary dryer,one is three drum rotary dryer.2, Drum Rotary slag DryerDrum Rotary slag dryer ... Ø 2.2x122-43-5700225-1633Ø 2.4x182-43-5700308-2053Three Drum Rotary DryerApplication Mainly used in drying Slag,Sand,Coal,Iron ... ,Ore,Quartz Sand,Clay and so on.The advantage of Three Drum Rotary Dryer for slag1. Save floor space of the machine2 ...