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A method for removing arsenic by leaching materials containing germanium and gallium

A leaching and material technology, applied in the field of arsenic-containing materials, can solve the problems of high content, affecting the quality of germanium and gallium enrichment, and low leaching rate of germanium

Active Publication Date: 2019-06-28
취저우화여우코발트뉴머터리얼컴퍼니리미티드 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional oxidation treatment method is uneconomical, the leaching rate of germanium is low, and the content of iron and arsenic in the alloy is high, which affects the quality of germanium and gallium enrichment, and also affects the working environment and occupational health

Method used

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  • A method for removing arsenic by leaching materials containing germanium and gallium

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Experimental program
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Effect test

Embodiment 1

[0032] 1) Atmospheric pressure oxidation leaching reaction

[0033] Add arsenic-containing materials: cobalt-copper-iron alloy materials containing germanium and gallium (containing germanium 3625g / t, gallium 763g / t, arsenic 1923g / t), sulfuric acid and compressed air into the stirring tank, atmospheric pressure oxidation leaching conditions: temperature 85 °C, react for 24 hours, and end-point sulfuric acid concentration of 10g / L, and obtain the first leaching liquid and the first leaching residue through solid-liquid separation.

[0034] Adjust the pH value of the above-mentioned first leaching solution to 1.5 with magnesium oxide, and perform conventional copper extraction to recover copper to obtain the extract and stripping solution. The stripping solution is subjected to the first electrowinning to recover the first copper. After electrowinning at this time The liquid is not taken out to continue the first electrowinning; the aforementioned extract is partially returned t...

Embodiment 2

[0044] 1) Atmospheric pressure oxidation leaching reaction

[0045] Add arsenic-containing materials: including germanium-gallium-containing cobalt-copper-iron alloy materials (containing germanium 2300g / t, gallium 450g / t, arsenic 1450g / t), sulfuric acid, and compressed air into the stirring tank, atmospheric pressure oxidation leaching conditions: The temperature was 75°C, the reaction was 32 hours, the final sulfuric acid concentration was 15g / L, and the first leaching solution and the first leaching residue were obtained through solid-liquid separation.

[0046] Adjust the pH value of the above first leaching solution to 1.5 with magnesium oxide, perform copper extraction to recover copper, obtain the extract and raffinate, and recover the first copper by electrowinning the extract. The first electrowinning; part of the aforementioned extract returns to participate in normal pressure oxidation leaching, and the initial solid-liquid mass ratio is adjusted to 1:8.

[0047] 2...

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Abstract

The invention discloses a method for removing arsenic by leaching materials containing germanium and gallium. For arsenic-containing alloys, the traditional oxidation treatment method is uneconomical, the leaching rate of germanium is low, and the content of iron and arsenic in the alloy is high, which affects the quality of germanium and gallium enrichment. The present invention combines atmospheric pressure leaching and pressure oxidation leaching to remove Arsenic and iron impurities, while improving the leaching rate of germanium, gallium and copper and other metals; and the combination of leaching and copper electrowinning, acid recycling, saving sulfuric acid and alkali consumption to the greatest extent, is an efficient, environmentally friendly and energy-saving wet method Smelting method.

Description

technical field [0001] The invention relates to a treatment method for materials containing arsenic, in particular to a method for removing arsenic by leaching materials containing germanium and gallium. Background technique [0002] Some cobalt-copper ore bodies in the DRC contain a certain amount of scattered metals of germanium and gallium, and the cobalt-copper-iron alloy powder after pyrometallurgy and granulation contains scattered metals of germanium and gallium. The traditional oxidation treatment method is uneconomical, the leaching rate of germanium is low, and the content of iron and arsenic in the alloy is high, which affects the quality of enrichment of germanium and gallium, and also affects the working environment and occupational health. Contents of the invention [0003] The technical problem to be solved by the present invention is that the leaching rate of germanium is low at present and the quality of enrichment of germanium and gallium is affected due ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B15/00C22B3/26C25C1/12C22B41/00C22B58/00C22B23/00C22B3/46
CPCC22B3/08C22B3/46C22B15/0071C22B23/043C22B41/00C22B58/00C25C1/12C22B3/26Y02P10/20
Inventor 邓永贵蔡能文胡雷张文凡卢方财张涛
Owner 취저우화여우코발트뉴머터리얼컴퍼니리미티드