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A configuration method of raw slurry in the process of producing alumina by sintering method

A configuration method and alumina technology, applied in the field of metallurgy, can solve the problems of difficulty in controlling the moisture content of raw slurry, a large number of blending tanks, and a low pass rate of indicators, so as to reduce the number of blending tanks and the number of pouring tanks, and reduce operation and maintenance costs , The preparation process is short and effective

Active Publication Date: 2018-10-12
INNER MONGOLIA DATANG INT RENEWABLE RESOURCES DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the traditional raw slurry configuration method requires multiple sampling and analysis, resulting in a blending time of more than 20 hours. The blending steps are complicated and difficult, and the number of blending tanks is large and easy to sink; on the other hand, in the traditional process Washing water for washing tube mills, centrifugal pumps and inverted tank pumps is easy to enter the operation process, resulting in difficult control of raw slurry moisture and low pass rate of indicators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Wet material slurry: pump the carbon separation mother liquor and silicon slag slurry into the mixing tank, and introduce the desiliconized fly ash filter cake into the mixing tank through the flow tank, and continuously mix until uniform under the condition of stirring. Use a pump to introduce the mixed wet material into the storage tank with a flow rate of 100m 3 / h, adjust the alkali ratio of the wet material after pulping to 0.95, and the moisture content of the wet material to 55%;

[0026] 2) Dry material grinding: add limestone, quicklime, anthracite, bauxite, etc. into the vertical mill for drying, grinding, mixing, and then enter the homogenization store to obtain dry powder;

[0027] 3) Mix the ingredients, put the dry powder in the homogenization warehouse into the mixer at a speed of 36.2t / h with a screw feeding scale, and mix evenly with the wet material after pulping under stirring conditions to obtain a mixture, and adjust the content of the mixture C...

Embodiment 2

[0030] 1) Wet material slurry: pump the carbon separation mother liquor and silicon slag slurry into the slurry tank, transfer the desiliconized fly ash filter cake into the slurry tank through the chute, and keep mixing until uniform under the condition of stirring. After homogenization, use a pump to introduce the mixed wet material into the mixing tank with a flow rate of 100m 3 / h, the moisture content of the wet material is 55%; adjust the alkali ratio of the wet material after pulping to 1.05;

[0031] 2) Dry material grinding: add limestone, quicklime, anthracite, bauxite, etc. into the vertical mill for drying, grinding, mixing, and then enter the homogenization store to obtain dry powder;

[0032] 3) For mixing ingredients, the dry powder in the homogenization warehouse is transported by screw metering, and is added to the mixing tank at a speed of 43.71t / h, and mixed with the wet material after slurrying under stirring conditions to obtain a mixture, and the mixture ...

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Abstract

The invention provides a preparation method of raw slurry used in the process of producing aluminum oxide through a sintering method. The preparation method comprises the steps that desiliconized fly ash filter cake, silicon slag slurry and carbonic acid mother liquor are mixed and subjected to slurrying, and the alkali ratio of the obtained wet materials is adjusted; solid raw materials are dried, ground and mixed to obtain dry powder; the mixing dosages of the dry powder and the wet materials obtained after slurrying are controlled by adopting a quantitative feeding mode, a mixed material is obtained, and the calcium ratio of the mixed material is adjusted; index analysis is conducted on the mixed slurry regularly, and the qualified aluminum oxide raw slurry is obtained. According to the method, the dry raw materials and the wet raw materials are operated separately, and the alkali ratio and the calcium ratio of the mixed raw slurry reach a qualified range through quantitative blending; the blending procedure is simple and effective, the defects that in the prior art, the blending steps are complex and big in difficulty, the process time is long due to the fact that multiple times of sampling analysis are needed in blending, and blending grooves are numerous and prone to sink are overcome, and not only is the qualification rate of the aluminum oxide raw slurry increased, but also the water content of the raw slurry is decreased.

Description

technical field [0001] The invention relates to a method for configuring raw slurry in the process of producing alumina by a sintering method, and belongs to the technical field of metallurgy. Background technique [0002] my country is the world's largest producer of alumina, and currently produces more than 40 million tons of alumina per year. In the process of producing alumina by sintering process, the clinker sintering section is the section with the largest energy consumption in the whole process, and it is also a key section related to the quality of alumina products; and in the clinker sintering section, due to the The alkali ratio, calcium ratio and water content of the pulp are directly related to the stability of the subsequent sintering, dissolution, first and second stage desiliconization and carbon seed separation processes, so how to configure qualified raw pulp is the key to the sintering process. top priority. [0003] The configuration method of the raw s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02
CPCC01F7/02
Inventor 豆卫博苏杰孙振斌张生邓忠贵杨彰根白天谊安爱文段晓明孙强刘振宏
Owner INNER MONGOLIA DATANG INT RENEWABLE RESOURCES DEV
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