The heat for drying raw materials is supplied by a boiling furnace, using a dual fuel combustion system with fuel and gas hot air supply: one combustion method is raw coal combustion; Another combustion method is to use gas as the drying heat source fuel, followed by directly using gas to supply hot air. The heat source can be used as a single fuel or mixed together.

The hot air stove provides the first type of heat source, which can be mixed with another type of heat source in the mixing chamber at a temperature adjustable from 300 ℃ to 900 ℃. It enters the dryer and exchanges heat with the hot air layer by layer under the rotation of the dryer's guide system, allowing the hot air to fully contact the material. The hot air takes away the moisture in the material and plays a role in drying the material. The wet exhaust gas from the dryer exhaust enters the dust collector, which purifies and exhausts the dust. The purified exhaust gas meets the standards and is discharged through the chimney.