to all

we have one kiln with preheater 6 stage ,2000 TPD ,56m length,3.8m diam, grate cooler.kiln suffering from the flow of  materials in the preheater that will happen suddenly any 20 mints and is noticeable when the cyclones out let draft changed. that a phenomenon lead to kiln cool after 5 mints only.my question how to solve this problem?notice that the kiln feed analyeses are:

LSF=92-95

SM=2.2-2.4

AM=1.5-1.6

AND NO ALKALIES