Production method for clinker used in alumina sintering method
A production method and alumina technology, applied in the direction of alumina/aluminum hydroxide, energy input, etc., can solve the problems of large influence on the heat balance of the rotary kiln, affect the dissolution rate, and low heat utilization rate of flue gas, so as to reduce the investment of large equipment Use quantity, improve physical and chemical quality, and make full use of the effect of flue gas waste heat
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[0036] Example 1
[0037] The Bayer process red mud slurry is dehydrated by a rotary drum filter, and the water content of the filter cake slurry is reduced to 35%-40%; limestone or lime, ore, and anthracite are ground into fine powder by cold air milling (fineness: 120 # The residue on the sieve is not more than 14%), the air swept mill adopts the flue gas from the fluidized bed to dry; the filter cake slurry after dehydration and the fine powder and soda ash produced by the dry mill are accurately quantified according to the production formula ratio through the metering facility Feed into a powerful mixer, fully disperse and mix evenly to obtain a semi-dry raw meal with a moisture content of 20% ± that meets the production requirements; the semi-dry raw meal is removed from the ball machine to make raw meal balls with a ball diameter of 5-20 mm, and feed In the fluidized bed or in the rotary kiln, use the high-temperature flue gas of the rotary kiln (above about 600℃) for drying...
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[0038] Example 2
[0039] Others are the same as in Example 1, except that the prepared raw meal balls directly enter the rotary kiln for drying, preheating, and firing, and the cold air mill is dried with flue gas from the rotary kiln.
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[0040] Example 3
[0041] Others are the same as in Example 1, except that the Bayer process red mud is dehydrated by a plate and frame filter press, and the water content of the filter cake slurry is reduced to 30-35%.
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