Extraction method of aluminium oxide continuous carbonic acid decomposition process

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...

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.