The cylinder installed in the zinc oxide rotary kiln is a cylindrical object with a certain slope, and the slope is 3.5 to 4%. With the help of the rotation of the kiln, the materials are stirred in the rotary kiln of the zinc oxide rotary kiln, and the materials are mixed with each other. , contact to react.

 The coal injection combustion at the kiln head generates a lot of heat, and the heat is transferred to the material by the radiation of the flame, the convection of the hot gas, and the conduction of the kiln brick (kiln skin). When the raw material moves in the kiln, the movement mode of the raw material particles changes periodically, or they are buried in the material layer and move upward together with the kiln, or they fall down on the surface of the material layer.