Reasons for the Products of Limonite Rotary Kiln Not Reaching the Sintering Temperature

时间:2021-11-19 作者 :超级管理员

Reasons of limonite rotary kiln products not reaching sintering temperature

It is inevitable that the products of limonite rotary kiln do not reach the sintering temperature. What is the reason? Let me introduce it to you today. Production is a complex thermal decomposition reaction process of calcium carbonate to calcium oxide. Due to different types of limonite rotary kilns, different equipment, and different raw material quality and composition, various problems will occur in calcination. The common problem is that the products do not reach the sintering temperature. The reason why the products of limonite rotary kiln do not reach the sintering temperature should be understood from the aspects of raw materials, operation and temperature control.

Limonite rotary kiln 1. Too large particle size: the calcination speed of limonite rotary kiln depends on the material size and the temperature contacted with the stone surface. However, at temperature, the calcination rate of stone depends on the particle size of stone. The larger the material content, the slower the calcination speed. Here, because the thermal conductivity of is less than that of calcination, the thickness of the layer gradually increases, the more difficult it is for heat to enter the stone, and the calcination speed is also slow. Therefore, there is often a sandwich in large stones, which is the first reason for the rotary kiln combustion of raw limonite. The grain size of ordinary shaft kiln should be controlled at 40-80mm, and the large capacity of limonite rotary kiln can be relaxed to 50-150mm.

2. The fuel proportion is too small or the calorific value of fuel is low: the proportion of fuel for mixed firing kiln is related to the technicality of limonite rotary kiln. Generally, the calorific value of coal for CO firing limonite rotary kiln shall be above 5500, the particle size shall be controlled, and the coal shall be properly added with water.

3. Unreasonable air supply: the stone in limonite rotary kiln is heated and calcined by fuel combustion, while the fuel is burned by oxygen. The combustion of any fuel must meet three conditions, including fuel, oxygen and fire, which are indispensable. In addition, the air supply is reasonable except for the proportional amount of fuel, On the inner section of limonite rotary kiln, some local air volume is large and some air volume is small. When the air is large, the products do not reach the sintering temperature naturally.

The best limonite rotary kiln also needs a good operating environment

Do you rely too much on limonite rotary kiln and neglect maintenance? Just like no matter how high-quality mobile phone can't withstand repeated falls and collisions, limonite rotary kiln needs a good environment for operation.

Because limonite rotary kiln has the characteristics of low consumption and high yield, it will become an important equipment for high-quality production in industrial production. However, in the actual operation of limonite rotary kiln, it often leads to the failure of limonite rotary kiln for some reason, such as the damage of parts and components due to the unqualified operation environment, which leads to the failure of limonite rotary kiln to complete the normal operation process and increase the production cost.

Therefore, it is more necessary for us to study and analyze the common faults in limonite rotary kiln in detail, and promote the efficient and more economical operation. Because the structure of limonite rotary kiln itself is relatively complex, it is easy to cause different degrees of faults under the bad operating environment. If we want to make limonite rotary kiln operate normally, we must analyze and clarify each cause of faults, classify them in detail, and formulate appropriate schemes accordingly, Our starting point often focuses on the self structure and actual operation of limonite rotary kiln.