Method for extracting metallic gallium from aluminium oxide production procedure

A production process and metal extraction technology, which is applied in the field of gallium metal extraction, can solve the problems affecting the stability of the production process, complex operation process, and resin imbalance that affect the life cycle of the resin, and achieve the effects of high degree of automation, easy process, and short process

Active Publication Date: 2007-02-14
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0003] The production of metal gallium resin method has become the main way to extract metal gallium from the alumina production process. Most of the process uses moving bed technology, which can achieve the purpose of extraction better, but in the extraction process due to Resin is frequently transferred between adsorption, washing, desorption, regeneration and other processes, resulting in large wear of the resin itself, easy pulverization, complicated operation process, resin imbalance between various processes, etc., which directly affects the service life and production process of the resin stability

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  • Method for extracting metallic gallium from aluminium oxide production procedure

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Embodiment 1

[0021] As shown in the figure, the method for extracting gallium metal from the alumina production process described in the present invention is carried out by using ISEP ion separation technology, and the adsorption gallium chelating resin is used for adsorption. There are 30 resin exchange columns in the ISEP system, and each column is loaded with 1.7 tons of resin.

[0022] (1) Adsorption with 12 columns, using two-stage serial series forward and countercurrent adsorption, adsorption time 20 hours, flow rate 25 cubic meters per hour, and the difference in gallium concentration before and after adsorption is 56 mg / L.

[0023] (2) Wash 2 columns, wash the resin countercurrently with 0.8N aqueous sodium hydroxide solution for 3 hours, flow rate 2 cubic / hour.

[0024] (3) Desorption Squeeze water and desorption 11 columns, use the aqueous solution of 2N sodium hydroxide and 0.7N sodium sulfide to desorb in series countercurrent, the time is 20 hours, and the flow rate is 2 cubi...

Embodiment 2

[0027] As shown in the figure, the method for extracting gallium metal from the alumina production process described in the present invention is carried out by using ISEP ion separation technology, and the adsorption gallium chelating resin is used for adsorption. There are 30 resin exchange columns in the ISEP system, and each column is loaded with 1.7 tons of resin.

[0028] (1) Adsorption with 12 columns, using two-stage series-connected forward and countercurrent adsorption, the adsorption time is 22 hours, the flow rate is 23 cubic meters per hour, and the concentration difference of gallium before and after adsorption is 54 mg / L.

[0029] (2) Wash 2 columns, wash the resin countercurrently with 0.5 aqueous sodium hydroxide solution for 3 hours, flow 2 cubic / hour.

[0030] (3) Desorption Squeeze water and desorption 11 columns, use the aqueous solution of 3N sodium hydroxide and 1.0N sodium sulfide to desorb in series countercurrent, the time is 20 hours, and the flow rat...

Embodiment 3

[0033] As shown in the figure, the method for extracting gallium metal from the alumina production process described in the present invention is carried out by using ISEP ion separation technology, and the adsorption gallium chelating resin is used for adsorption. There are 30 resin exchange columns in the ISEP system, and each column is loaded with 1.7 tons of resin.

[0034] (1) Adsorption of 12 columns, using two-stage serial sequential and countercurrent adsorption, the adsorption time is 25 hours, the flow rate is 20 cubic meters per hour, and the concentration difference of gallium before and after adsorption is 55 mg / L.

[0035] (2) Wash the 2 columns, wash the resin countercurrently with 0.7N aqueous sodium hydroxide solution for 2 hours, and flow 3 cubic meters per hour.

[0036] (3) Desorption Squeeze water and desorption 11 columns, use the aqueous solution of 2N sodium hydroxide and 0.8N sodium sulfide to desorb in series countercurrent, the time is 22 hours, and t...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/24C22B58/00
CPCY02P10/20
Inventor 王树栋周波阎爱萍陈玉国刘光升
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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