Method for extracting metallic gallium from aluminium oxide production procedure

Abstract

The invention relates to a method for extracting gallium from alumina production flow. It adopts ISEP ion separation technique and adsorption gallium chelating resin. Its technology conditions are as follows: back flow adsorbing that liquor in Bayer process is processed by two stage series connection to make gallium concentration difference be 50-60 mg / L; back flow washing by 0.5-1N sodium hydroxide solution for the resin; back flow desorbing by 2-3N sodium hydroxide and 0.6-1.0N sodium sulfide solution; back flow rebirthing by 0.5-1N sodium hydroxide solution for the resin. It has the advantages of short flow, simple operation, little resin abrasion, high automation etc.

Description

technical field

[0001] The invention relates to a method for extracting metal gallium from an alumina production process, which is used for the recovery of metal gallium and also belongs to the production and preparation of scattered metals. Background technique

[0002] Gallium is a kind of scattered metal, which has important applications in the semiconductor industry. With the further development of semiconductor technology, the demand for gallium metal is expected to increase substantially in the future. The sources of metal gallium are scarce, and its products mostly come from by-products such as the aluminum industry. Bauxite usually contains 0.002-0.008% gallium metal. During the production of alumina by the Bayer method, about 70% of the gallium metal in the bauxite is leached together with the alumina, and about 30% remains in the red mud. The loss of gallium is a pity. With the circulation of the seed mother, the metal gallium concentration in the Bayer method se...

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