Working principle and application of rotary kiln equipment
Author: changdeli Machinery Factory
Release time: 15:12, July 18, 2017
Lime rotary kiln Can calcine a variety of different materials, is a common roasting equipment. And now in order to control the quality of finished clinker, the use of automatic control devices, so that we can lower energy consumption, processing a large number of raw materials, but also can improve the quality of equipment calcination. To achieve the characteristics of high yield and low energy, so that the equipment can burn high-quality clinker at the same time, strengthen the energy conservation. Automatic control device is added to enable Rotary kiln equipment So what is the structure and working principle of rotary kiln equipment. Let's look at the following analysis:
First, there are chemical and physical reactions inside the rotary kiln, and the calcination stage is divided into three stages: preheating stage, calcination stage and cooling stage. When the limestone is calcined, the heat between the material and the calcining zone is exchanged back and forth in the rotary kiln area, so that the moisture of raw meal is evaporated. In the case of uneven heating, the volume expands and the ultimate compressive strength decreases. When the internal temperature reaches 700 ℃, that is, it enters the calcination zone.
2. The calcination zone is in the middle of the rotary kiln. When the materials enter the area, the fuel starts to burn with the help of the blower. Can release a lot of heat, so that the temperature in the kiln will slowly rise, when the temperature reaches a certain range. At this point, it is necessary to control the temperature. For example, the decomposition rate of limestone in this case and the gas generated will be relatively large, which is conducive to raw meal calcination into clinker. The produced gas is driven out by the air flow, and the clinker begins to enter the cooling zone
3. The cooling belt is in the lower part of the kiln body of the rotary kiln equipment. At this time, the residual clinker will not be decomposed in this area. At the same time, the material after calcination can be cooled. The relative position of each region is relatively stable. Can not be separated randomly, to operate according to the change of raw materials and fuel conditions. After cooling inside the kiln, the material can be used better. These are just a simple introduction to the composition and principle of rotary kiln. If you are interested in purchasing, you can go to the manufacturers that can produce metallurgical rotary kiln equipment, which can increase the user's knowledge.
Application range of rotary kiln
Technical features of lime rotary kiln: the vertical preheater with advanced structure and low pressure loss can effectively improve the preheating effect
It is mainly used for roasting of iron ore in rotary kiln and iron and steel industry.
Rotary kiln is mainly used for magnetization roasting of lean iron ore in iron and steel plant of metallurgical industry; smelting magnesium by silicothermic method; oxidizing roasting of chromite and nickel iron ore; and roasting of active lime and dolomite for iron and steel plant and ferroalloy plant in refractory plant (i.e. active lime kiln).