Rotary kiln is widely used in the world to calcine small particle materials, which is suitable for the majority of steel, calcium carbide chemical and non-ferrous metal production enterprises. It can directly calcine 10-40mm fine-grained raw material lime or light calcined dolomite. It has the characteristics of good raw material adaptability, large output, uniform product, high activity and stable production operation.
The rotary kiln has simple structure, smooth air flow, and sulfur-bearing flue gas can be discharged in time. Sulfur content in fuel is not easy to attach. Therefore, the sulfur content of calcined product is low and purity is high, which meets the quality requirements of finished products. At the same time, the material is rolled in the circumferential direction and moved along the axial direction (from the high end to the low end). The heating is uniform, the temperature of the combustion device is easy to control, the calcination quality is good, the quality is stable, and the product activity can reach more than 360ml.
In the rotary kiln for calcining lime or light burning dolomite, there are several configuration requirements as follows: rotary kiln with vertical preheater and vertical cooler, rotary kiln with grate preheater and grate cooler, rotary kiln with single barrel cooler, etc. Sinocalci adopts the advanced rotary kiln calcination technology of chamber vertical preheater and vertical cooler.
Based on the traditional rotary kiln technology, we have carried out a lot of technical innovation and process upgrading, and achieved good results. The new technologies include: Based on the full analysis of raw materials, targeted design of air volume and height of preheater; design and development of energy-saving and high-efficiency burners, which not only improve the calcination efficiency and inhibit NOx generation, but also greatly improve the ring forming situation of rotary kiln; the adoption of staged combustion technology at the end of kiln to create a reduction environment of NOx at the end of the kiln and further reduce the emission of NOx; the use of advanced composite technology Combined with refractory, the radiation heat loss is effectively reduced, the working environment is improved, and the service life of refractory material of rotary kiln is obviously increased.
Main technical parameters：
|3||Thermal principle of calcination||counter-flow, roll|
Lime activity，ml(4N HCL 5min）
|5||Particle size of raw materials，mm||10--40、40--80|
|7||calcination temperature, ℃||1200--1320|
|8||Ineffective heat emission，kJ/kg||2048|
|9||Annual working days||340|
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