Hi,  We did this exercise in 2004 when we converted our old 125t/h, single string cyclone preheater kiln into a 36t/h lime kiln. However, the Metso limestone preheater was sized for a specific lime market volume, not the actual maximum possible capacity of the kiln, which is estimated at about 80t/h. The old cyclone ...

There could be many causes for such a sudden rush of material in the burning zone. Possibly the breakaway of some coating or a ring. A sudden change in feed chemistry or fuel calorific value. It is impossible to diagnose the cause without much more information. Thanks Dr Michael Clark