Interpretation Of Conventional Cement Kiln Hengchang Metallurgy Techniques - Hengchang Metallurgy,

Cement kiln process in operation, often encounter many problems

. Metallurgy Building Materials Equipment Plant Hengchang summarized a number of technical staff operating methods and experience, are summarized as follows, to discuss research with colleagues.

1, ignition operation Whether new or maintenance production will encounter after the ignition, the ignition system must be linked before the test firing, the feed in order to avoid having equipment failure caused by small pre-heater system temperature too high, cyclone, and the next Barrel blocking the emergence of such adverse conditions. Whether using wood or diesel ignition. High-temperature fan full throttle should be closed, depending on the situation due to open fire chimney, so yaotou was micro vacuum state in order to prevent too large and difficult to pull the wind light. When injected into the coal in the coal as possible to ensure the burn rate, not sprayed into too much, and slowly add coal; and the interval period of time rotary kiln, rotary kiln each l / 4, to avoid tube bending. When the temperature reaches above 700 , the application of secondary transmission continuous rotary kiln, as the case fan start temperature, the appropriate degree of regulation damper; when the temperature reached 900 , can use the main transmission kiln. If the ignition diesel pump should be busy all closed, but can be adjusted appropriately small valve opening; when materials arrive after the feed can be stopped after burning with oil. When feeding, temperature, and in accordance with pre-heater kiln outlet temperature to determine; kiln start feeding amount should be relatively high, normally not less than the design yield of 60%, followed by gradually increasing the volume of feed and feeding rate should small not big, until the normal amount of feed; In addition, should minimize the amount of feed in the low running time, because during this period can easily cause the collapse of material pre-heater system to plug.

2, hanging skin of the operation of the kiln

After brick in the exchange (here refers only to burning zone) to properly carry out drying kiln operation, should not the temperature soared. Hanging skin first kiln raw ingredients have certain requirements, in particular the number and volume of liquid material refractoriness. Liquid quantity is easy to form kiln skin, but also breaking down easily, not strong, can not withstand high temperature calcination; if less liquid, fire-resistant material, leather is more difficult to form a kiln, the kiln after the formation of skin very strong, But if it is not easy breaking down on the link up. In my years of experience in plant, hanging skin when the kiln is generally on the use of normal production, the raw material powder is better, so that is conducive to the formation of kiln skin. Because in the calcination process, the kiln skin is a dynamic equilibrium, even a small part of the caving is also easy to catch up on hanging, but avoid the hanging occurred during the kiln run skin raw and under-burning phenomenon.

3, unstable handling incoming In normal production, raw materials are there fluctuations in the volume of feed, but less volatile. However, some equipment problems, or raw water during the rainy season difficult to control, easier to get raw material in the library or library wall top agglomeration, resulting in poor feed when the next, there will be greater volatility. In this case, required the operator to observe the ground, ground to adjust, but also a certain degree of predictability. According to some current changes in transportation equipment to determine the amount of material. Pre-made response to treatment measures to reduce the yield, quality, and equipment adversely affected.

(1) when the incoming low, the avoid to pulverized coal burner into it, to open a large exhaust, lengthening the flame, it would be a sharp rise in temperature kiln, calciner, cyclone temperature will soon rise high, which is very likely to cyclone or under the bond or even plug the pipe material, smoke chamber and calciner kiln easily crust, and the system resistance increases. When the material less of the correct operation method is: out of retirement due to a number of coal burner, close down small exhaust, reducing decomposition furnace and kiln head of the feed coal quantity, good control of temperature and cyclone kiln temperature, with rapid short flame burning, waiting for the arrival of materials.

(2) when the incoming higher, there will be pressure Kiln appear cyclone and calciner exit temperature, kiln temperature will drop sharply, this time should be appropriately reduced kiln speed, reducing the volume of feed big opening exhaust, coal injection into his pipe, this can increase the kiln temperature, pre-burn effect of strengthening material; coal can only increase, but never too much, otherwise it will create a reducing atmosphere, so that the kiln temperature is lower. When the kiln owners pass motor current decreased rapidly, we must reduce kiln speed, out of coal burner, with due emphasis on small exhaust volume, short flame can be used at this time rapid fire, so back to normal. When the kiln conditions to normal, further feeding, do not feed to mention temperature, it would be operating in a passive state, production, quality is difficult to be guaranteed.

by: gaga

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