The principle of cooling machine is the use of external low displacement internal high temperature, the grain temperature out of the cooling machine, as a general rule, be 40 ~ 60 ℃, by cooling machine cooling process, the material can be removed about three percent of the water, under the condition of the ideal, to be able to achieve the requirement of the cooling and drying.

Cooling machine is the main configuration of rotary kiln production system equipment, its structure is simple, stable performance, reliable to turn. After heat of exhaust gas can be introduced into rotary kiln, thus improve the thermal efficiency of the whole system. Alias cooling drum machine, used in compound fertilizer production, cooling temperature and particle size of fertilizer, and the drying machine. Can greatly improve the cooling speed, reduce labor intensity and increase production. Further removes partial moisture content and reducing fertilizer grain temperature. At the same time to cooling can be used to other powder and granular materials. Cooling machine equipment compact structure, high cooling efficiency, reliable performance, strong adaptability.

The device can be cooling the air over the materials after all in the kiln, as a secondary circulating air, improves the thermal efficiency of furnace, at the same time it has simple structure, high rates of operation, the operation and maintenance is very convenient, is suitable for the small cement plant to use.