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Method for recovering germanium from copper-lead-zinc-arsenic-germanium materials

A material, copper and lead technology, applied in the field of germanium recovery, can solve the problems of arsenic hydrogen gas hazards, poisoning accidents, etc., and achieve the effect of less production pollution and reduced hazards

Inactive Publication Date: 2021-09-17
YANGZHOU NINGDA NOBLE METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is: with the participation of acid, the arsenic-containing substance in the solution can be replaced by a strong reducing agent (such as an active metal as a replacement agent) and precipitated in the form of AsH3 gas (that is, the three elements produced by arsine are: acid, arsenic, Reducing metal simple substance), that is, arsenic-containing material will produce arsine gas when it is in contact with a metal reducing agent in an acidic solution
Arsine gas is very harmful and can easily cause poisoning accidents

Method used

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  • Method for recovering germanium from copper-lead-zinc-arsenic-germanium materials

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 Shown, the method that reclaims germanium from copper-lead-zinc-arsenic-germanium material:

[0023] In the first step, the copper, lead, zinc, arsenic and germanium materials are crushed to 120 meshes, and then an oxidant is added. The weight of the oxidant is 8% of the weight of the material, and the mixture is uniformly obtained by mixing;

[0024] In the second step, the mixture obtained in the first step is oxidized, oxidized at a low temperature of 300°C for 2 hours, then raised to 400°C for 2 hours, then raised to 600°C for 2 hours, then raised to 750°C for 2 hours Cooling out of the furnace to obtain metal oxides;

[0025] In the third step, the metal oxide obtained in the third step is crushed to 120 mesh;

[0026] The fourth step is to mix the crushed metal oxide with hydrochloric acid, chlorinated distillation, the solid-to-liquid mass ratio of metal oxide and hydrochloric acid is 1:12, pass chlorine gas for about 2 hours during chlorinated...

Embodiment 2

[0029] The difference between this embodiment and embodiment 1 is that in the first step, the weight of the oxidant is 5% of the material weight, and the effective recovery rate of germanium is 96.88%.

Embodiment 3

[0031] The difference between this embodiment and embodiment 1 is that in the first step, the weight of the oxidant is 10% of the material weight, and the effective recovery rate of germanium is 97.13%.

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Abstract

The invention discloses a method for recovering germanium from a copper-lead-zinc-arsenic-germanium material. The method specifically comprises the following steps of 1, crushing the copper-lead-zinc-arsenic-germanium materials, adding an oxidizing agent, and uniformly mixing to obtain a mixture; 2, carrying out oxidation treatment on the mixture obtained in the step 1; 3, crushing the metal oxide obtained in the step 3; 4, mixing the crushed metal oxide with hydrochloric acid, performing chlorination distillation, condensing and collecting to obtain germanium tetrachloride; and 5, hydrolyzing, washing, filtering and drying the germanium tetrachloride to obtain crude germanium dioxide. The production pollution is small, the arsenic hydride generation condition is destroyed, hydrogen and arsenic hydride gas do not exist, the harm is reduced, and during heating oxidation, four-section temperature rising type heating is adopted, so that elements in the materials are fully oxidized.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for recovering germanium from copper, lead, zinc, arsenic and germanium materials. Background technique [0002] Germanium is an important scattered metal and the most important semiconductor material besides silicon. It has extensive and important applications in various fields such as infrared optics, optical fiber communication, aerospace, chemical catalysts, solar cells, and biomedicine. On the other hand, the resources of germanium in the world are relatively poor. The proven reserves of germanium metal in the world are about 8,600 tons, and the global reserves are only enough for 40 years. Now most developed countries are vigorously developing aerospace technology and new energy technology, and the sustainable development of these technologies is inseparable from germanium. As my country's economy continues to develop at a high speed, the level of science and t...

Claims

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Application Information

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IPC IPC(8): C22B41/00C22B7/00C22B1/00C01G17/02
CPCC22B41/00C22B7/006C22B1/005C01G17/02Y02P10/20
Inventor 袁承乾
Owner YANGZHOU NINGDA NOBLE METAL CO LTD
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