If the overall combustion performance, including NOx, fineness, fuel distribution, LOI, and superheater slagging cannot be improved with ball charge changes, then consideration should be given to the installation of static-centrifugal classifiers. These classifiers provide appropriate capability to achieve fineness. A static-centrifugal classifier functions not only as a classifier, but also homogenizes the fuel distribution from pipe to pipe. This mixing function is equally important as coarse particles return to the pulverizer.

 

STORM designed static classifiers are field proven on ball tube and attrita type mills. In many plants, they offer the most technically feasible solution, compatible with burner and other reduced NOx changes.