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Ask the quicklime production process?

Ask the quicklime production process?

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Preparation method and process flowCrushing method: the Department of CaCO3 containing more than 90% of the white stone with Raymond mill or other high pressure grinding by crushing, grading, separation, and the finished product.Packing: packed in plastic bags of 50 kg net each.Storage and storage precautions stored in a dry warehouse. Bag breaking prevention in transportation. Must not be mixed with liquid acids.
Theoretical equation CaCO3+42.5kCal---~CaO+CO2In theory, the production of 1 tons of quicklime need to invest in the production of 1.78 tons of limestone, in actual production, due to the quality of raw materials and technical operation error, resulting in partial combustion and impurities. Generally more than 1.78 tons of limestone.
The quality of calcined lime depends on the balance of wind, coal and material, and the main conditions for the calcination temperature of wind and coal.(1) the size of the stone into the kiln should be appropriate. The weight of the stone was controlled within 0.5 lOkg, and the particle size was controlled between 60 and 200mm. The big stone is placed in the middle of the kiln.(2) increase the contact surface. The use of thin coal, thin material calcination, with the particle size of 25ram small particles of coal, increase the contact of the fuel and lime, to avoid the temperature of the limestone near the fuel is too high and excessive combustion: far from the fuel limestone temperature is low. Cause to burn.(3) increase the amount of air entering the kiln. Add the flue, strengthen the negative pressure ventilation, improve the heat utilization rate. A dust blower is arranged at the lower outlet of the kiln. The coal in the kiln is completely burned in the high temperature zone.(4) ensure the kiln ", preheating temperature, cooling three with stability, do kiln and the material surface distance, keep the preheating zone in a certain depth, the position of the primer of high temperature zone not elongate, suspended in midair, the edge is not sinking

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