Method for enriching gallium from mother-liquor in technology for producing alumina from high-alumina fly ash

A technology of high-alumina fly ash and process mother liquor, applied in the direction of improving process efficiency, can solve problems such as damage to equipment and operators, unfavorable industrial production, environmental pollution of hydrochloric acid, etc., and achieves significant environmental and economic effects and resource utilization. High and efficient enrichment effect

Active Publication Date: 2013-11-06
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the iron removal and acidification treatment of the sample are required before ion adsorption, which is a complicated process. At the same time, hydrochloric acid seriously pollutes the environment and will cause great damage to equipment and operators, which is not conducive to industrial production.

Method used

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  • Method for enriching gallium from mother-liquor in technology for producing alumina from high-alumina fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Use a resin with an amidoxime structure produced by a resin factory to activate the column, and the capacity of the resin column is about 300ml. The concentration of gallium in the mother liquor used as a raw material is 80-100ppm. The mother liquor is fed into the column at a flow rate of 12.5ml / min, and it penetrates completely after about 16 hours. The concentration of gallium in the effluent liquid is more than 90% of the concentration of the original mother liquor. . Use 2mol / L potassium hydroxide solution as the washing solution, and still feed the washing solution at a flow rate of 12.5ml / min, and the washing will end after about 75 minutes. Use an aqueous solution containing 1mol / L sodium sulfide and 3mol / L sodium hydroxide as the eluent, and put the eluent on the column at a rate of 2.5ml / min for about 40 hours. Among them, the eluent in the 0-2 hours and > 6 hours is a low-concentration enrichment solution, which can be returned to reconstitute the eluent; th...

Embodiment 2

[0068] Use the resin of acrylonitrile-divinylbenzene structure with amidoxime structure produced by a resin factory, and pack it into a column after activation. The capacity of the resin column is about 600ml. The concentration of gallium in the seed liquor as raw material is 100-120ppm, and the flow rate of the seed liquor is 20ml / min. After about 20 hours, the concentration of the effluent reaches more than 90% of that of the original seed liquor. Use 4 mol / L potassium hydroxide solution as the washing liquid, and still enter the washing liquid at the same flow rate, and the washing ends after about 90 minutes. Use an aqueous solution containing 0.5mol / L sodium sulfide and 4.2mol / L sodium hydroxide as the eluent, and the eluent passes through the resin column at a rate of 5ml / min, and the complete eluting time is about 40 hours. Among them, the eluent in the 0-2 hours and > 6 hours is a low-concentration enrichment solution, which can be returned to reconstitute the eluent; ...

Embodiment 3

[0070] Use the resin of acrylonitrile-divinylbenzene structure with amidoxime structure produced by a resin factory, and pack it into a column after activation. The capacity of the resin column is about 1500ml. The concentration of gallium in the mother liquor used as a raw material is 60-80ppm, and the mother liquor is passed into the column at a flow rate of 50ml / min. After about 20 hours, the concentration of the effluent is about 90% of the concentration of the original mother liquor. . Use 1mol / L potassium hydroxide solution as the washing solution, and still feed the washing solution at a flow rate of 50ml / min, and the washing will end after about 90 minutes. Use an aqueous solution containing 0.6mol / L sodium sulfide and 1mol / L sodium hydroxide as the eluent, and the eluent passes through the column at a rate of 12.5ml / min for about 40 hours. Among them, the eluent in the 0-4 hours and > 8 hours is a low-concentration enrichment solution, which can be returned to recons...

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Abstract

The invention relates to a method for enriching gallium from a mother-liquor in a technology for producing alumina from high-alumina fly ash, and relates to the technical fields of solid waste comprehensive utilization and ion exchange. The metal gallium is obtained by taking a spent liquor with a low gallium concentration in the technology of producing alumina from the high-alumina fly ash as a raw material, employing technologies of ion exchange and process reinforcement, performing adsorption and elution to obtain a gallium enriching liquor, further processing and performing electrolysis. Aiming at the structure characteristics of gallium in the high-alumina fly ash, the method has the advantages of being high in enriching efficiency on low-concentration gallium solution, simple in producing technology, abundant in raw material source, and substantial in economical and environmental benefits.

Description

technical field [0001] The invention relates to the technical fields of solid waste comprehensive utilization and ion exchange, in particular, the invention relates to a method for enriching gallium from a mother liquor of a process for producing alumina from high-alumina fly ash. Background technique [0002] Scattered gallium metal is an alloy semiconductor material and thin-film solar cell material with excellent performance. With the advancement of science and technology, its application field has gradually expanded to military industry, aerospace and other fields, and its demand has shown a rapid upward trend. At present, gallium is mainly obtained in the form of by-products from the mother liquor of alumina produced by Bayer process in industry. [0003] CN 101560602A discloses a method for recovering gallium from a solution, in particular to recovery of gallium (Ga) from the mother liquor of an alumina plant by ion exchange. The invention is characterized in that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B58/00C22B3/42
CPCY02P10/20
Inventor 李少鹏李会泉孙俊民李菲张战军张靖峰
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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