... efficiency 80% 2.heat-resisting anti-friction alloy steel 3.Reasonable price New Design Three Drum Sand Rotary Dryer hot sale in EuropeOur ... resisting anti-friction alloy steel, long service time, easy maintenance.4, Heating efficiency, outer drum temperature is lower than 60°C ... .B.ApplicationThree drum rotary dryer is mainly for the materials with some water contact, such as drying sand, slag, coal, ...