Changzhou Ouna drying equipment Co., Ltd. of the gas inlet temperature of 300 degrees, the dryer volumetric evaporation rate for 5kg/m3/h thermal efficiency is 30% - 50%; if the gas inlet temperature of 500 degrees, evaporation volume rate for 35kg/m3/h; thermal efficiency is 50% - 70%. So for processing ore, sand Shuo, coal, phosphorus calcium sulfate material drying roller bucket with direct combustion furnace flue gas, fuel gas can use coal, oil, natural gas, liquefied gas and other.