Rotary kiln's effect and classification

Calciner kiln's effect

1. Its technical performance and operation determine the quality, output and cost of enterprise products to a great extent. "As long as the kiln turns, there will be tens of millions" is a vivid description of the importance of the rotary kiln in production.

2. In the building materials industry, in addition to calcining cement clinker, rotary kiln is also used to calcine clay, limestone and slag drying; In the production of refractory materials, the raw materials are calcined in rotary kiln to stabilize the size and increase the strength, and then processed and formed.

3. During beneficiation, the lean iron ore is magnetized and roasted in a rotary kiln to change the original weak magnetism of the ore into strong magnetism, which is conducive to magnetic separation.

4. In the chemical industry, the rotary kiln is used to produce soda, calcine phosphate fertilizer, barium sulfide, etc. In the 1960s, lapple and others in the United States invented a new process for producing phosphoric acid in rotary kiln. This method has the advantages of low energy consumption, less power consumption, no sulfuric acid and the utilization of medium and low-grade phosphate rock.

5. The whole production process of cement is summarized as "two grinding and one burning", in which "one burning" is the process of burning the raw meal prepared by grinding into clinker under the high temperature of rotary kiln. Therefore, rotary kiln is the main machine in cement production, commonly known as the "heart" of cement factory.

6. In terms of environmental protection, developed countries in the world have used cement kilns to burn hazardous waste and garbage for more than 20 years, which not only reduces and makes waste harmless, but also uses waste as fuel, saves pulverized coal and makes waste resource.

Calciner kiln's classification

Classification of rotary kiln: according to the appearance, it can be divided into variable diameter rotary kiln and full diameter rotary kiln. According to the purpose, it can be divided into cement rotary kiln, ceramsite sand rotary kiln, aged soil rotary kiln, lime rotary kiln, etc. according to different energy supply effects, it can be divided into gas rotary kiln, coal-fired rotary kiln and mixed fuel rotary kiln.

1. Variable diameter rotary kiln

Rotary kiln with varying front and rear diameters. Generally, the front and rear diameter changes by about 30cm. Compared with the traditional full diameter rotary kiln, it has the advantages of energy saving and high yield, but the variable diameter rotary kiln is more difficult to process than the traditional full diameter rotary kiln. More stringent requirements for equipment.

2. Full diameter rotary kiln

It is a rotary kiln with the same front and rear diameter. Our common type of rotary kiln was invented by German Dietz in 1883. After more than 100 years of evolution, rotary kiln has become a general equipment. It has better effect and higher output than traditional shaft kiln. The processing is simple, but it consumes more energy than the variable diameter rotary kiln.