The fuction of cement rotary kiln skin

2017-08-18 09:30:32

Depending on the temperature and the chemical reaction, the rotary kiln can be divided into four temperature zones, which are the forging zone, the transition zone, the firing zone and the part of the cooling zone. The general firing zone is located in the kiln from the kiln to 5 times the diameter of the kiln, in this area there is a relatively stable kiln pulp exists, kiln skin to extend the life of the kiln refractory bricks and have a very critical role, rotary kiln maintenance costs , The proportion of refractory bricks is particularly large, if the kiln brick kiln caused by the kiln, the cost of refractory bricks is not, the loss of production will be greater. It can be seen that the protection of kiln skin to extend the life of refractory brick has an important role. But if the kiln is too thick will cause the kiln to reduce the effective space is not conducive to the firing of the progress, and even cause knot kiln skin is clinker or dust from the liquid or semi-liquid phase into a solid, its main The role is:
1. Protection of refractory bricks, so that refractory bricks are not directly affected by high temperature and chemical erosion.
2. Store heat, reduce the heat loss of the kiln shell to the surroundings, and improve the thermal efficiency of the rotary kiln.
3. Acting as a heat transfer medium, in the kiln skin exposed to the air, and high temperature air contact, through the radiation or convection way to absorb heat, when the kiln in the lower part of the material in contact with the conduction of heat transfer to the raw material.
4. Kiln surface rough, it can reduce the flow rate of powder to extend the material in the kiln reaction time.

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