The control of clinker fines emissions after the heatexchanger, placed downstream of the clinkercooler,is usually a problem for cementplant managers.
The process is characterized by high material abrasiveness, high loads and variable flow ratein normal and maximum conditions.
The usual dedustingarrangement includes a bag filter as a finalstage deduster, which is typically associated with high maintenance costs anddowntime in production due to frequent replacements of filter elements.
Reducing fineparticulates from the exhaust stream ofthe pre-heater toweris also an objective in order to purify the air used for energy recovery, such as heating a petroleum coke or coal mill, thereby increasing the value of thegrinded product. A high efficiency cyclone systemis often used for this purpose.