The molecular sieve solution of Tianli Company is a complete process system that dries paste, slurry, filter cake and other multi-form materials into uniform powder products by flash dryer, and then calcings the powder materials at high temperature by rotary kiln. The high-temperature flue gas produced by the roasting system can be recycled as the heat source of the flash drying process, reducing the energy consumption of the drying process by more than 25%, and achieving the purpose of heat reuse and energy saving.