The choice of heat source for drying equipment can be hot air furnace, fluidized bed furnace, etc. The cost of a hot air stove is lower, but it needs to burn coal well and will not produce slag; Fluidized bed furnaces have a relatively high cost and can burn coal. The selection of drying equipment is mainly based on the local actual situation. If it is in a coal production area and the environmental requirements are not strict, a fluidized bed furnace can be used.