Process of calcining bauxite in rotary kiln
2020-07-09
Bauxite, also known as bauxite or bauxite, is mainly composed of alumina, hydrated alumina containing impurities, and is an earthy mineral. White or off-white, brownish yellow or light red due to iron. Bauxite is generally formed by chemical weathering or exogenous action, there are few pure minerals, always contain some impurity minerals, more or less clay minerals, iron minerals, titanium minerals and heavy detrital minerals and so on.
Working principle of bauxite rotary kiln
The cylinder body of the bauxite rotary kiln is made of rolled steel plates, and the cylinder body is lined with refractory lining, and is at a prescribed slope from the horizontal line. It is supported by three wheel belts on each support device, and the wheel belt at the feeding end A tangential spring plate is used to fix a large ring gear on the nearby inner cylinder, and a small gear is engaged with it. During normal operation, the main transmission motor transmits power to the open gear device through the main reducer to drive the bauxite rotary kiln.
The material enters the kiln from the kiln tail (the higher end of the barrel) for calcination. Due to the inclination and slow rotation of the barrel, the material rolls in the circumferential direction and moves in the axial direction (from the higher end to the lower end) , Continue to complete its technological process, raw material through the kiln head cover into the cooling machine for cooling.
Bauxite rotary kiln structure
Bauxite rotary kiln is mainly composed of kiln cylinder body, transmission device, support device, wheel block device, kiln head sealing device, kiln tail sealing device, kiln head cover, etc.
Bauxite rotary kiln function
1. The bauxite rotary kiln is a conveying device; raw material is added from the higher end of the cylinder (ie the kiln tail). During the continuous rotation of the kiln, the material moves from the higher end to the lower end (ie the kiln head ) Gradually exercise.
2. The bauxite rotary kiln has a heat exchange function; the bauxite rotary kiln has a relatively uniform temperature field, which can meet the heat exchange requirements of each stage of the cement clinker formation process.
3. The bauxite rotary kiln is another combustion equipment; as a combustion equipment, the rotary kiln has a wide space and thermal field, can provide enough air, install an excellent combustion device, ensure that the combustion is fully burned, and provide clinker calcination The necessary heat.
4. The bauxite rotary kiln has a chemical reaction function; the bauxite rotary kiln can meet the heat and temperature requirements of different mineral formations in stages, and it can also meet their time requirements. It is an ideal chemical reactor.
5. The function of bauxite rotary kiln to degrade and use waste; it has a high temperature field and a thermal field with long airflow stagnation time, which can degrade harmful waste discharged from chemical, pharmaceutical and other industries.
The above is the process of bauxite calcination system Yanhe Heavy Industry, which is specially developed and produced for the properties of bauxite. Both the performance and the structure have significant advantages. The following Red Star machine briefly introduces the work of the bauxite rotary kiln Principle, structure and function.
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