Ring formation at kiln inlet about 4 meters .

Dear expert,

      I am facing ring formation in calcination zone at kiln inlet to 4.0 mt frquently.

      I am using AF like tyre dust, msw, platice waste and agro waste with 100 % indian pet coke.

      MY kiln inline calciner KP kiln 4.2 D*64 L  (kiln tpd 4000 to come down 3200 tpd)

     I want take trial to remove  kiln ring by using lime stone bolder and sand gravel by feeding at kiln inlet riser duct.

 Can help to remove ring and any other tumbling method can broken ring in running kiln.

 GKS