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The causes blockage of the rotary kiln

Published 2020/6/12 16:26:08

Rotary kiln is a kind of kiln that we are more familiar with. It has a wide range of uses and has contributed a lot to the production work in our lives. It will be more complicated for its composition, so it needs more attention when performing operations. Too. We often cause equipment failures due to improper operation. The problem of clogging of the kiln is, what are the reasons for the clogging of the kiln? Let’s understand below:
   1. Porcelain roller is contaminated
The contamination of the porcelain rollers of the rotary kiln is mainly manifested in that the porcelain rollers are stained with oil, and different sizes of knots are formed on the porcelain rollers. Due to improper control of the glaze of the green bricks, many glaze droplets are attached to the bottom surface of the product. These will cause the glaze droplets to soften during the high-temperature calcination and adhere to the roller, resulting in different roller diameters, thus causing certain resistance to the products running on the porcelain roller. The following products cannot move forward normally, and irregular arrangement and product overlap occur. When the overlapped products exceed the softening point of the high-temperature load of the porcelain roller, the porcelain roller breaks, causing kiln blockage.
   2. The firing temperature and firing atmosphere are unreasonable
  The temperature adjustment of the rotary kiln is to divide the burner into several groups in the pre-heating zone and the firing zone, which are controlled separately according to the upper and lower rows of the porcelain roller, and the cooling zone is controlled by controlling the cooling air volume. In the process of adjusting the firing temperature, if the temperature of the upper part of the porcelain roller is much higher than the temperature of the lower part, the product has a concave deformation; otherwise, a convex deformation occurs. The former is more likely to cause the products to stick together or overlap before and after in production, and the latter is easy to embed between the rollers, breaking the rollers and causing blockage. Improper control of the cooling belt will cause wind cracking of the product, and the broken product will be embedded between the rollers, which may also cause blockage. In addition, when the adjustment of the atmosphere system is unreasonable, the products will be deformed and foamed during the firing process, causing the products to stack and the kiln to be blocked.
   3. The running time of the "brick" in the kiln is too long
  The control system of kiln adopts chain automatic control. In the event of power failure or mechanical equipment failure, the movement state of all rollers is automatically changed to a swing state based on the power frequency, so that the product makes a round-trip movement in the kiln, and the product is deformed due to too long calcination time, causing the rotary kiln Blocked.
  4、Gap firing
The kiln firing is continuous. If the brick feeding is unstable and stops at times, it will cause the products in the kiln to cover the porcelain rollers to form a gap, resulting in unstable kiln pressure and large fluctuations in temperature, resulting in products that are easily deformed , Product clogging.
   5. Loose brick of porcelain roller is loose
  The loose bricks and convex deformation of the porcelain roller will make the rollers not rotate in the same plane, causing the products to be stacked or inserted between the rollers, causing the furnace to block.
   6. The bricks in the kiln head are not aligned
  The bricks in the kiln head are not arranged neatly, which will cause the products to collide with the kiln body, deform or overlap the products, and seriously block the kiln.
This is the reason why the rotary kiln is clogged. Through the above introduction, we found that there are many reasons for the clogging of the kiln. Commonly, it is due to the contamination of the porcelain rollers, the firing temperature and the firing atmosphere are unreasonable and empty. The burning time of the stall, the “swinging” of the raw bricks in the kiln, the running time is too long, the cushion tiles of the porcelain rollers are loose, and the bricks in the kiln head are not aligned properly, so we should pay attention to avoid these when operating The problem occurs.

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