When the rotary furnace is working, the first thing is that its materials and fuel must enter from different ends of the kiln, that is, the materials enter from the high-end kiln end of the cylinder, and the fuel is sprayed in from the kiln head. As the cylinder tilts and rotates slowly, the materials both roll in the circumferential direction and move in the axial direction from the high-end to the low-end. At the same time, the heat generated by the fuel under the action of wind and coal injection pipe will be transmitted from the kiln head to the kiln tail Finally, the waste gas generated by combustion is exchanged with the material and exported from the kiln tail. Finally, the generated clinker enters the cooling machine for cooling through the kiln head cover. The process of collision between this heat and the material constitutes the calcination of the material
During operation, the gas flow in the combustion zone of the rotary furnace is more complex. The gas flow in the combustion zone of a rotary kiln can be approximated as jet flow. A rotary kiln is a cylinder with a limited diameter, when the gas in front is pushed forward. Cement kilns are mainly used for calcining cement clinker, divided into two categories: dry production cement kilns and wet production cement kilns. The metallurgical and chemical rotary furnace is mainly used for magnetization roasting of lean iron ore in steel plants in the metallurgical industry; Chromium and nickel iron ore oxidation roasting; Refractory material factory roasting high alumina vanadium earth ore and aluminum factory roasting clinker and aluminum hydroxide; Chemical plants roast minerals such as chromium ore sand and chromium ore powder. Lime kilns (also known as active lime kilns) are used to roast active lime and light burned dolomite used in steel and iron alloy plants
