How to hang kiln skin in rotary kiln?

Rotary kiln is the main equipment for cement production. The cement rotary kiln is an inclined, rotating cylinder that is placed on several pairs of rollers by several belts, and fireproof bricks are embedded on the inner wall. The raw meal is fed into the kiln shell from the high-end feeding tube of the kiln shell. Due to the inclination of the kiln shell and slowly turning, the material is rolled up in the circumferential direction and goes from high temperature to low in the axial direction. The compound moving movement of the end, the raw material in the kiln through the preheating, decomposition, firing and other processes, after the firing of cement clinker from the bottom of the kiln cylinder unloading, into the cooler. The fuel is injected from the kiln head and burned in the kiln. The heat emitted heats the raw material, and the raw material is calcined into clinker. The hot air formed during the exchange process with the material enters the kiln system from the kiln feed end, and finally The chimney discharges into the atmosphere.

The rotary kiln is mainly composed of a kiln shell body, a transmission device, a supporting device, a stop wheel device, a kiln head sealing device, a kiln tail sealing device, a kiln hood, and the like. The cylinder of the cement rotary kiln is a cylinder made of steel plate. To protect the cylinder of the rotary kiln, a refractory brick is arranged on the inside as a kiln liner.

How to hang the kiln skin The new dry kiln generally hangs the kiln skin as follows:

When the kiln temperature reaches 950 degrees, the temperature of the vortex decomposing chamber reaches 650-700 degrees and the kiln fire brick starts to glow and white, the raw material fed first is about to enter the firing zone. At this time, the kiln shall be left in flames, keep the firing temperature high enough, and restore the two C4 ash valves that were hoisted. The third air duct valve was opened to about 10%, the swirl chamber and the decomposing chamber valve were opened, and light diesel oil and a small amount of pulverized coal were injected into the vortex chamber. When the C1 outlet temperature reaches 400-450 degrees, open the cold air valve placed on the exhaust pipe of the high-temperature fan at the outlet of C1, and mix the cold air to adjust the exhaust gas temperature to protect the high-temperature fan. When the gas temperature at the C5 outlet reaches 900 degrees, three large duct valves can be properly opened to discharge the gas. Feeding capacity is 30-40% of the designed capacity, and gradually closes the cold air valve to appropriately increase the amount of coal fed and the amount of air discharged from the system. The speed is transferred to the kiln and the kiln skin is started. The system is normal, and after the decomposition furnace temperature is stable, it can be removed. Ignition nozzles; If anthracite is burned, the use time of the ignition nozzles should be appropriately extended, but the amount of oil can be reduced to help the smokeless combustion. The key to hanging the kiln skin is to adjust the coal feeding amount and the kiln speed when the raw material reaches the firing zone, so as to ensure that the temperature of the firing zone is stable, the kiln speed is matched with the feeding amount, and the thickness of the kiln skin adhered is consistent. smooth. If the temperature is too high, the kiln skin that is hung on can easily be burnt. The raw material can easily burn and the firebrick can erode heavily. If the temperature suddenly drops, the raw material can run and the kiln skin becomes loose and easy to fall. It usually takes 3-4 classes to hang the kiln skin.