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What are the causes of internal balling in the rotary furnace

time:2022/4/12 16:05:00 来源:http://cn.sinokiln.com/news968464.html

  If agglomeration occurs during the operation of the rotary furnace, it will affect the ventilation inside the kiln, hinder material processing, and also have a significant impact on the equipment. What are the reasons for this phenomenon? During the granulation process of the rotary furnace, the repeated shutdown of the raw powder preparation system causes the dust collected from the kiln tail to frequently transform in both directions of entering the raw powder homogenization silo and directly entering the kiln, which can cause the raw powder to transform The fluctuation of chemical composition disrupts the balance of the internal thermal system and provides conditions for granulation within the system. Unstable feed and unstable feed rate can lead to chaos in system processing. When the feed rate fluctuates from high to low, the temperature at the kiln end will increase, and under high temperature conditions, liquid phase will appear in advance and the temperature will be calcined; When the feed rate fluctuates in the opposite direction again, the materials in the pre decomposition furnace will not be able to preheat and decompose well, and these materials will fall into the kiln tail, providing a good nucleating agent for the spherical core. Another issue is that the combustion of coal powder is unstable and incomplete. When the flame is too long and the fire head is backward, local high temperatures can cause local high temperatures at the kiln tail, leading to premature appearance of the liquid phase of the kiln tail material and the formation of spherical shapes. When the ventilation inside the kiln is poor, it will exacerbate the incomplete combustion of coal powder and generate local high temperatures, which will directly lead to spheroidization in the rotary furnace. In addition, it will create a reducing atmosphere in the kiln. When the volatility coefficients of potassium, sodium, chlorine, and sulfur in the material increase, it will have a significant impact on skinning and granulation. These are all the reasons for the formation of balls in the rotary furnace, and the above are the main reasons for the formation of balls inside the rotary furnace


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