1: less investment: dryer equipment investment is 1/6 of the imported products, using alloy steel manufacturing than ordinary steel wear 3-4 times. 2: high efficiency: dryer thermal efficiency up to 80%, improve the thermal efficiency of 48% 3: thermal energy is optional: the fuel can be used for white coal, bituminous coal, gangue, oil, and steam, and can bake lumps, granule, and powdery .