A kind of pre-desulfurization method of high-sulfur bauxite

Abstract

The invention discloses a high sulfur bauxite pre-desulphurization method. The method is characterized in that a solution obtained after the pre-desulphurization of high sulfur bauxite by using a sodium hydroxide solution with a low concentration in the presence of oxygen is recycled, and the concentrated solution is used to dissolve out aluminum in bauxite. The method is simple and effective. The sulfur content decreases to below 0.7% after the desulphurization pretreatment of the high sulfur bauxite, and the pre-desulphurized bauxite can be used in a barer process. The method has the advantages of low operation temperature, good desulphurization effect, low energy consumption and the like.

Description

technical field

[0001] The invention relates to a pre-desulfurization method of high-sulfur bauxite, which belongs to the technical field of metallurgy. technical background

[0002] In recent years, my country's alumina production has increased year by year. In 2012, my country's alumina production reached 37.696 million tons, an increase of 10.3% over 2011. Affected by the rapid development of my country's alumina industry, my country's bauxite mining volume is increasing year by year. In 2010, domestic bauxite output reached 31.45 million tons, an increase of 21.2 million tons compared with 2001, with an average annual increase of 24%. The mining volume of bauxite is large, and the ratio of production to storage is basically the highest in the world. The poor guarantee ability of bauxite resources has seriously restricted the sound development of my country's aluminum industry. With the increase of domestic mining efforts, my country's bauxite resources are not only fac...

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