Method for treating inert aluminum ash in aluminum ash treatment technology

A treatment process, aluminum ash technology, applied in chemical instruments and methods, preparation of alkali metal aluminate/aluminum oxide/aluminum hydroxide, aluminum compounds, etc., can solve the problems of a large amount of solid waste and less than effective treatment, and achieve The effect of improving efficiency and effectiveness

Inactive Publication Date: 2018-10-12
YUNNAN WENSHAN ALUMINUM
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for treating inert aluminum ash in the aluminum ash treatment process, so as to solve the problem that a large amount of solid waste cannot be effectively treated during the production of aluminum

Method used

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  • Method for treating inert aluminum ash in aluminum ash treatment technology
  • Method for treating inert aluminum ash in aluminum ash treatment technology

Examples

Experimental program
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Embodiment 1

[0045] This embodiment provides a method for inert aluminum ash treatment in the aluminum ash treatment process, such as figure 1 As shown, the mixture of aluminum ash and raw slurry, that is, the mixture of inert aluminum ash, carbonate, oxalate, caustic alkali, and milk of lime, is fired in turn through a rotary kiln, cooled by a cooler, and finally cooked in a ball mill. Material dissolution.

Embodiment 2

[0047] On the basis of Example 1, this embodiment is further limited: the temperature in the rotary kiln is 900-1000° C., and the sintering time is 30 minutes.

Embodiment 3

[0049] On the basis of Example 1, this embodiment further defines: after the aluminum ash and water are made into a slurry of 0.8-1.1Kg / L, the raw meal with a moisture content of 37-41% and an alkali ratio of 0.95-1.05 The slurry is evenly mixed and fired in a rotary kiln, wherein the mass ratio of aluminum ash to raw slurry is 1:0.47-1:0.49.

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Abstract

The invention discloses a method for treating inert aluminum ash in an aluminum ash treatment technology. A mixture of aluminum ash and raw slurry is fired through a rotary kiln, is cooled through a cooling machine and is finally subjected to clinker leaching in a ball grinding mill in sequence. A device provided by the invention can be used for safely and efficiently treating the inert aluminum ash in the aluminum ash; lime milk is prepared and reacts with F<-> to generate CaF2, so that harmful elements and harms caused by the fact that the F<-> enter flue gas are eliminated; meanwhile, organic matters accumulated by a Bayer process can be treated. The rotary kiln is arranged and materials with different grain diameters can be uniformly mixed; the calcination efficiency and effect are improved.

Description

technical field [0001] The invention relates to the technical field of aluminum industry, in particular to a method for treating inert aluminum ash in the aluminum ash treatment process. Background technique [0002] The production process of aluminum is accompanied by the generation of harmful gases and solid waste. With the development of aluminum electrolysis technology in the world, the harmful gases generated by aluminum electrolysis production have been relatively ideally controlled, but the harmful solid waste, aluminum ash, has not been effectively treated for a long time , my country's aluminum output has reached 35 million tons per year, and the solid harmful slag aluminum ash produced every year has been threatening our living environment. Therefore, it is necessary to take measures to control it. The aluminum ash is mainly composed of metallic aluminum, α-Al 2 o 3 , aluminum nitride, silicon and silicon oxide, NaCl, fluoride and other mixed components, in which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/04
CPCC01F7/0693
Inventor 唐绍华赵加平郝红杰董庭鸿黄源刘定明车立志高云川杨德荣韩海健李俊福杨顺高张建猛陈映
Owner YUNNAN WENSHAN ALUMINUM
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