Intermediate clinker breaker

Because of the intermediate clinker breaker and hot air return, the multiple-stage cooler with duotherm air circuit is characterized by high exhaust airtemperatures in conjunction with good internal thermal efficiency. This type of cooler will therefore always constitute the most economical solution in cases where the raw material has a high moisture content and therefore needs considerable heat input for drying. 

Grate coolers and shaft coolers present the least problems in this respect, because the increase in fan capacity and size of housing necessitated by higher altitude has only a minor effect on the overall cost of the cooler. On the other hand, with the shaft cooler the attainment of suitably low final clinker temperatures becomes even more problematical at high altitudes, while in the case of grate coolers it becomes advisable under such circumstances to install a type comprising an intermediate breaker and a circulating air system. 

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