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A kind of gallium-germanium adsorbent, its preparation method and application, and the method for enriching gallium-germanium from the zinc hydrometallurgy leaching solution

A technology for hydrometallurgical zinc and adsorbents, which is applied in chemical instruments and methods, other chemical processes, and the improvement of process efficiency, can solve the problems of inability to effectively recover gallium, difficult separation, and high cost, and achieve low production costs for enterprises. , the effect of shortening the process flow and the simple preparation method

Inactive Publication Date: 2017-11-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The extraction method has high requirements on the acidity of the system and the concentration of the solution. The domestic extraction agent is not very selective for gallium and germanium, and it mainly relies on imports, which restricts the expansion of application; and the residual tannin organic matter in the traditional tannin method will affect the production of zinc oxide. The process produces adverse effects, and the cost is relatively large; the ferric hydroxide colloid produced in the method of neutralizing and sinking iron and germanium will deteriorate the filtration performance of the ore pulp, and the recovery rate of gallium and germanium is not high; in the zinc powder, iron powder replacement method, process zinc powder, The consumption of iron powder is relatively large, the leaching rate of gallium and germanium in the produced replacement slag is not high (50-70%), and there will be AsH in the replacement enrichment process 3 Toxic gas is produced, which deteriorates the production environment
[0003] In the prior art, there is also a report of activating sepiolite with hydrochloric acid to adsorb gallium in the zinc slag leachate, but when using this method, sepiolite can adsorb Cu, Zn, Fe and other metal elements in the leachate, and there is no adsorption effect. selectivity, resulting in difficulties in subsequent separation, and the inability to effectively recover gallium, while the Cl in it - Enrichment can also adversely affect subsequent electrolysis

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 8

[0042] The leaching solution containing gallium and germanium (containing 30mg / L of germanium, 30g / L of gallium, 145g / L of zinc, and 5g / L of iron) was added into the reactor, and after adjusting the pH to 1, 0.1mol / L oxalic acid and 0.02 mol / L catechol-activated mixed adsorbent (the mass ratio of activated carbon and sepiolite is 3:1) 5g, according to the liquid-solid volume mass ratio (mL / g) of the leachate and the adsorbent is 30, the reaction temperature is 30 ℃, the adsorption time is 1 hour, and the adsorbent enriched with gallium and germanium is obtained, wherein the adsorption rate of gallium is 92.35%, the adsorption rate of germanium is 95%, the adsorption rate of zinc is 2.56%, and the adsorption rate of iron is 1.21%.

Embodiment 9

[0044] Add the leaching solution containing gallium and germanium (30mg / L containing germanium, 30g / L containing gallium, 145g / L containing zinc, 5g / L containing iron) into the reactor, after adjusting the pH=2.5, add 0.1mol / L oxalic acid and 0.02 mol / L catechol-activated mixed adsorbent (the mass ratio of activated carbon and sepiolite is 3:1) 5g, according to the liquid-solid ratio of the leachate and the adsorbent is 30, the reaction temperature is 30°C, and the adsorption time is 1 hour. The adsorbent enriched with gallium and germanium is obtained, wherein the adsorption rate of gallium is 95.23%, the adsorption rate of germanium is 97.14%, the adsorption rate of zinc is 4.31%, and the adsorption rate of iron is 1.60%.

Embodiment 10

[0046] The leaching solution containing gallium and germanium (containing 30mg / L of germanium, 30g / L of gallium, 145g / L of zinc, and 5g / L of iron) was added into the reactor, and after adjusting the pH to 3, 0.1mol / L oxalic acid and 0.02 mol / L catechol-activated mixed adsorbent (the mass ratio of activated carbon and sepiolite is 3:1) 5g, according to the liquid-solid ratio of the leachate and the adsorbent is 30, the reaction temperature is 30°C, and the adsorption time is 1 hour. The adsorbent enriched with gallium and germanium was obtained, wherein the adsorption rate of gallium was 96.24%, the adsorption rate of germanium was 98%, the adsorption rate of zinc was 4.52%, and the adsorption rate of iron was 2.12%.

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Abstract

The invention discloses a gallium and germanium absorbent, a preparation method and application of the gallium and germanium absorbent, and a method for enriching gallium and germanium from a zinc hydrometallurgy leaching agent. The gallium and germanium absorbent is capable of simultaneously absorbing the gallium and the germanium effectively and specifically, and the gallium and germanium absorbent is simple in preparation method and low in cost. When the gallium and germanium absorbent is used for absorbing the gallium and the germanium in the zinc hydrometallurgy leaching agent, the absorbing effect is good, and the pertinence is high; the follow-up process of zinc electrolytic can be effectively conducted, and the cost is low. The used absorbent and stripping liquid can be recycled and reused, and a good absorbing effect on the gallium and the germanium can still be achieved after the absorbent and the stripping liquid are recycled and reused for many times. The requirement for industrial production is met.

Description

technical field [0001] The invention relates to a gallium-germanium adsorbent, its preparation method and application, and a method for enriching gallium-germanium from a zinc hydrometallurgy leaching solution, belonging to the technical field of nonferrous metallurgy. Background technique [0002] As a high-tech supporting material, gallium-germanium plays an important role in national production, but there are few independent deposits of gallium-germanium in nature. Gallium-germanium is mainly extracted from the smelting process of lignite, lead-zinc ore, and bauxite. set. In the zinc hydrometallurgy system, gallium and germanium have different trends depending on the smelting method. In conventional zinc hydrometallurgy, gallium and germanium mainly enter the middle leaching slag, enter the soot after fuming treatment, and then obtain gallium-containing zinc after acid leaching. The leaching solution of germanium; in the high-temperature and high-acid leaching process, g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20
CPCY02P10/20
Inventor 刘志宏刘付朋李玉虎李启厚李思唯刘智勇文达敏
Owner CENT SOUTH UNIV
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