Extraction method of aluminium oxide continuous carbonic acid decomposition process

A decomposition process, alumina technology, applied in the preparation of alumina/hydroxide, alkali metal aluminate/alumina/aluminum hydroxide, etc., can solve the problems of high energy consumption and high cost of compressed air, and achieve saving The effect of compressing air, improving utilization rate and reducing production cost

Active Publication Date: 2006-08-02
中铝中州铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high energy consumption and high cost caused by the use of compressed air in order to provide a method of using carbon dioxide gas to lift materials in order to address the shortcomings in the above-mentioned alumina production process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] CO with a concentration of 37% and a pressure of 0.16MPa 2 gas as a feed gas, the CO 2 The gas is passed into the feeding pipe between the decomposition tanks, and the slurry enters the next decomposition tank under the action of the pressure difference, and the above process is repeated in each decomposition tank, that is, the continuous carbonic acid decomposition process of alumina production is completed.

Embodiment 2

[0013] CO with a concentration of 12% and a pressure of 0.2MPa 2 gas as a feed gas, the CO 2 The gas is passed into the feeding pipe between the decomposition tanks, and the slurry enters the next decomposition tank under the action of the pressure difference, and the above process is repeated in each decomposition tank, that is, the continuous carbonic acid decomposition process of alumina production is completed.

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Abstract

An extracting process for the continuous carbonic acid decomposition procedure in production of aluminium oxide features that the compressed CO2 gas instead of compressed air is used for the extracting and then for the carbonic acid decomposition.

Description

technical field [0001] The invention discloses a material-lifting method for the continuous carbonation decomposition process of alumina, and relates to a method for producing alumina by continuous carbonation decomposition using a sintering method. Background technique [0002] The traditional sintered alumina carbonation decomposition process usually adopts intermittent decomposition, which has high labor intensity, low equipment operation rate and unstable product quality. With the advancement of alumina production technology, the continuous carbonation decomposition process of sintering method is gradually replacing the discontinuous carbonation decomposition process in the production of alumina. The continuous carbonation decomposition process is to connect 4-6 carbon tanks in series through connecting pipes. The sodium aluminate solution passes through the 10-meter-high connecting pipe from the bottom of the first decomposition tank, and is lifted to the second one und...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/14C01F7/04C01F7/30
Inventor 崔华锋黄昂李海明孙建锋贺东联刘冬剑刘伟赵东峰刘亚平程旭王二星王镇平张玲仙
Owner 中铝中州铝业有限公司
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