Method for preparing calcium carbide
A calcium carbide and carbon-based technology, applied in the direction of carbide, calcium carbide, etc., can solve the problems of only 50% thermal efficiency, long reaction time and high energy consumption
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[0022] Thus, in the method for preparing calcium carbide in the embodiment of the present invention, raw coal and quicklime are pulverized into ultrafine powders, and co-pyrolysis is carried out to obtain direct raw material coke, semi-coke or a mixture of carbon black and quicklime for preparing calcium carbide, and further use The direct raw material is hot sent to the gas melting furnace to prepare calcium carbide. Therefore, the method combines the preparation of calcium carbide raw materials with the production of calcium carbide, and the calcium carbide can be directly prepared by using raw coal and quicklime. The limitation of the existing calcium carbide preparation method using coke, semi-coke or carbon black and quicklime as raw materials to prepare calcium carbide is avoided. Moreover, the method for preparing calcium carbide in the above-mentioned embodiments of the present invention pulverizes raw coal and quicklime and then pyrolyzes and smelts, which can signifi...
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[0044] raw material:
[0045] Quicklime is used as the calcium-based raw material, and the CaO content is 96%.
[0046] The long-flame coal is used as the carbon-based raw material, and the main properties of the long-flame coal are shown in Table 1.
[0047] Table 1
[0048] project
unit
value
Remark
whole water
%
5.3
received base
%
68
Volatile matter
%
23
Ash
%
9
[0049] Preparation:
[0050] First, the long-flame coal is dried by an indirect tube-type drum drying device, the drying heat source is 0.8MPa saturated steam, and the moisture content of the long-flame coal after drying is 0.3%.
[0051] After drying, the long-flame coal is pulverized with a ball mill, and the average particle size after pulverization is all less than 10 microns.
[0052] Mix the pulverized ultrafine long-flame coal powder and quicklime (average...
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