Due to the different types of limonite rotary kilns, different equipment, and differences in the quality and composition of raw materials, it is inevitable that there will be problems of one kind or another in the process of calcination, and the common one is raw burning. The reasons for the raw burning of limonite rotary kilns should be found out in terms of raw materials, operation and temperature control.
1. The particle size is too large: the calcination speed of the limonite rotary kiln depends on the material size and the temperature in contact with the stone surface. But at a certain temperature, the calcination rate of the stone depends on the particle size of the stone. The larger the material content, the slower the calcination speed. Here, since the thermal conductivity is smaller than that during calcination, the thickness of the layer gradually increases, the more difficult it is for heat to enter the interior of the stone, and the slower the calcination rate. Therefore, there are often sandwiches in large stones, and this is the first reason why raw limonite is fired in a rotary kiln. The particle size of ordinary shaft kiln should be controlled at 40-80mm, and the kiln capacity of limonite rotary kiln can be relaxed to 50-150mm.
2. The fuel ratio is too small or the fuel calorific value is low: the ratio of the fuel used in the co-firing kiln is related to the technicality of the limonite rotary kiln. The coal used in the mixed-fired limonite rotary kiln generally requires a calorific value of more than 5500, the particle size must be controlled to a certain extent, and the coal should be properly added with water.
3. Unreasonable air supply: The stones in the limonite rotary kiln are heated and calcined by fuel combustion, and the fuel is burned by oxygen. The combustion of any fuel must meet three conditions, including fuel, oxygen, and fire. In addition to the fact that the fuel has a certain proportion of the amount of fuel, it is the rationality of the air supply. In the section of the limonite rotary kiln, some parts of the air volume are large and some are small. In places where there is little wind, raw burning will naturally occur.
Working principle of limonite rotary kiln
In short, even the best limonite rotary kiln also needs a good operating environment. It is precisely because the limonite rotary kiln has the characteristics of high quality, low consumption and high yield that it will become an important equipment for high-quality production in industrial production. However, in the actual operation of the limonite rotary kiln, the limonite rotary kiln often fails for some reason, such as the damage of the parts due to the unqualified operating environment, and other damages, which in turn lead to the limonite rotary kiln failure. The mine rotary kiln cannot complete the normal operation process and increases the production cost.
Therefore, it is more necessary for us to conduct detailed research and analysis on common faults in limonite rotary kilns, and to promote efficient and economical operation. Because the structure of the limonite rotary kiln itself is relatively complex, it is easy to cause different degrees of failures in the case of a harsh operating environment. If we want to make the limonite rotary kiln operate normally and efficiently, we must analyze its Each cause of the failure is classified in detail, and an appropriate plan is formulated accordingly, and our starting point is often placed in the structure and actual operation of the limonite rotary kiln.