Introduce the Rotary Drum Cooler Technology

Cooling machine is one of the main machines in rotary kiln production system. The quality and grindability after cooling down is improved. The air from cooling clinker is injected into kiln, as secondary circulating air, raising the thermal efficiency of horizontal kiln. The direct air swept rotary cooler design consists of a rotating cylinder with internal flighting. This cooler design brings hot product into direct contact with the cooling medium, in a countercurrent flow configuration. The cooling medium may be ambient air, cooled air or special gases.

Rotary drum cooler is one of the main equipments in rotary kiln production system. Its role is to cool the 1000~1300°C clinker from rotary kiln to 200°C and below by heating exchange of moving materials and airflow inside the rotating barrel. The quality and grindability after cooling down is improved. The air from cooling clinker is injected into kiln, as secondary circulating air, raising the thermal efficiency of kiln.

The technology of Hongxing rotary drum cooler is particularly suited for applications involving cooling hot materials from 700ºC to 5-10ºC of the ambient air temperature. Specialized cooler designs handling high temperature products to 1600ºC can also be provided. If the material to be cooled is at an extremely high temperature, the feed end of the cooler can be refractory lined or fabricated from high temperature alloys. Used in series with a direct fired rotary drying machine or clinker rotary kiln, the hot air leaving the cooler can serve as preheated secondary combustion air, the resulting in reduced fuel usage.

The hot process material is introduced into one end of a rotating cylinder where it is lifted on flights secured to the ID of the cylinder and showered through the cooling air stream. The air passes though the cylinder countercurrent to the material, thus providing the most efficient heat transfer and coolest product temperature. In special cases, the air for cooling can be refrigerated to remove moisture from the air or to cool the product below ambient temperature.

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