Method for recovering germanium from germanium-containing multi-metal material

A multi-metal and material technology, applied in the field of germanium recovery, can solve the problems of intractable extraction, large environmental impact, and low recovery rate of germanium

Active Publication Date: 2014-04-30
YUNNAN DONGCHANG METAL PROCESSING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] What the present invention aims to solve is that the existing process for extracting germanium from multi-metal materials such as germanium and gallium produced in the hydrometallurgy process of lead-zinc ore is too long, the production cost is too high, and the recovery rate of germanium is too low , the problem of excessive environmental impact, provides an efficient, economical, and environmentally friendly recovery process for germanium in such germanium-containing multi-metal materials, and solves the problem of extracting germanium in complex and difficult-to-handle germanium-containing multi-metal materials

Method used

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  • Method for recovering germanium from germanium-containing multi-metal material

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Embodiment 1

[0040] Embodiment 1: A method for recovering germanium from germanium-containing polymetallic materials, wherein the main chemical components of germanium-containing polymetallic materials are shown in the table below.

[0041]

[0042] The specific recycling steps are as follows:

[0043] In the first step, in a 3000L reactor for chemical distillation, take 500kg of multi-metal materials containing 0.40% germanium, the amount of germanium metal is 2.0 kg, add 500L of tap water, start stirring, and dissolve and disperse the multi-metal materials containing germanium Finally, add 500L of industrial hydrochloric acid with a concentration of 10 mol / L.

[0044] In the second step, after the reaction until the solution no longer produces gas, slowly add 25kg of ammonium fluoride solid, and control the reaction temperature of the solution at 45-55°C.

[0045] In the third step, after 1 hour of reaction, slowly add 20 kg of potassium permanganate to further oxidize and decompose ...

Embodiment 2

[0051] Embodiment 2: A method for recovering germanium from germanium-containing polymetallic materials, wherein the main chemical components of germanium-containing polymetallic materials are shown in the table below.

[0052]

[0053] The specific recycling steps are as follows:

[0054] In the first step, take 500kg of multi-metal material containing 0.70% germanium in a 3000L reaction kettle for chemical distillation, and add 750L of tap water with the amount of germanium metal being 3.5 kg. Start stirring to dissolve and disperse the germanium-containing polymetallic material, and then add 750L of industrial hydrochloric acid with a concentration of 10 mol / L.

[0055] In the second step, after the reaction until the solution no longer produces gas, slowly add 37.5kg of ammonium fluoride solid, and control the reaction temperature of the solution at 45-55°C.

[0056] In the third step, after 1 hour of reaction, slowly add 30 kg of potassium permanganate to further oxid...

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Abstract

A method for recovering germanium from a germanium-containing multi-metal material belongs to a germanium extracting method in the technical field of metallurgy, in particular to a technical method for recovering germanium from the multi-metal material containing the germanium, gallium, tin, copper, silver and the like. The method comprises the following steps: as for the germanium-containing multi-metal material of which the germanium content is higher than 0.1%, carrying out oxidation pretreatment on the material by water, hydrochloric acid, ammonium fluoride and potassium permanganate, then recovering the germanium with a distillation separation method, hydrolyzing obtained germanium tetrachloride containing part of fluoride into germanium dioxide, and carrying out secondary distillation and purification after removing fluorine by sulfuric acid to prepare high-purity germanium dioxide. According to the technical method, the recovery rate of germanium can reach more than 95%.

Description

technical field [0001] The invention belongs to a method for extracting germanium in the technical field of metallurgy, in particular to a process method for recovering germanium from multi-metal materials containing germanium, gallium, tin, copper, silver and the like. Background technique [0002] In the hydrometallurgy process of lead and zinc, especially in the sulfuric acid neutral leaching process of zinc calcine, a large amount of materials rich in germanium, gallium, tin, copper, silver and other valuable metals will be produced. Because the material contains high rare and precious metals such as germanium, gallium and silver, as well as a large amount of tin, copper, lead, zinc and other metals, it has extremely high recycling value. For example, a lead-zinc production plant can produce more than 4,000 tons of such materials in a year, containing as much as 16 tons of rare metal germanium, worth more than 180 million yuan, and containing as much as 16 tons of galliu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/04C22B41/00
CPCY02P10/20
Inventor 普世坤朱知国尹国文
Owner YUNNAN DONGCHANG METAL PROCESSING
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