At approx 0600 the chute coming off of E231 plugged. At some point it appears that the V-belts on C132 had burnt off & the belt had stopped allowing hot material to sit on the belt & build more heat. The material was able to get to C132 due to a rotted gate in the C231 to C132 discharge chute. The Fire was found and reported @ 0615 by Kiln Operator.