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Method for achieving germanium precipitation through metallic oxide

An oxide and germanium precipitation technology, applied in the direction of improving process efficiency, can solve the problems of low germanium grade, high raw material requirements, harsh operating conditions, etc. Effect

Active Publication Date: 2016-08-31
ZHEJIANG HUAYOU COBALT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tannin precipitation method is easy to operate and has a high precipitation rate, but tannin is expensive and used in a large amount, generally 25 to 30 times the content of germanium, which is a one-time consumable, and the tannin organic matter contained in tannin will affect the subsequent The extraction process of cobalt and copper has a certain impact, and the price of tannin is relatively expensive, and the supply of tannin is limited
h 2 Although the S precipitation method has the advantages of fast germanium enrichment and good selectivity, the operating conditions are harsh, which is not conducive to production, and the H 2 S is toxic, the operating environment is poor, there are safety hazards in actual industrial production and the requirements for reaction devices are extremely high
The Fe-Ge co-precipitation method uses Fe 3+ Co-precipitate with Ge to recover germanium during hydrolysis and precipitation. This method has a better environment and no pollution, but if Fe in the feed solution 3+ The concentration is higher, and the Fe(OH) generated by hydrolysis in the solution 3 The amount of colloid is large, the content of iron in the slag is high, the grade of germanium is low, and the filtration performance of the slag is poor. 3+ If the concentration of germanium is low, it will not sink completely, so the Fe-Ge co-precipitation method has higher requirements on raw materials and has certain limitations.

Method used

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  • Method for achieving germanium precipitation through metallic oxide
  • Method for achieving germanium precipitation through metallic oxide
  • Method for achieving germanium precipitation through metallic oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 50L sulfuric acid leaching solution from cobalt-copper smelting as the pre-precipitation solution for germanium, in which the concentration of Cu is 0.73g / L, the concentration of Fe is 22.97g / L, the concentration of Ge is 1.09g / L, and the concentrations of other impurities are shown in Table 1, and heated to 72°C , add metal oxide and water to the germanium pre-precipitation liquid, adjust the pH value to 5.0, carry out the alkaline one-stage germanium precipitation reaction for 1 hour and then filter, wash the first-stage filter residue and dry it for detection; heat the first-stage filtrate to 70°C and then add the metal oxide and water, adjust the pH value to 6.0, carry out the second-stage germanium precipitation reaction with alkali for 1 hour, and then filter, wash the second-stage filter residue, dry and test it, and test the second-stage filtrate. The test results are shown in Table 1.

[0019] Table 1 Example 1 detection result

[0020] Element ...

Embodiment 2

[0023] Take 50L of sulfuric acid leaching solution from cobalt-copper smelting as the pre-precipitation solution for germanium, in which the concentration of Cu is 0.55g / L, the concentration of Fe is 24.04g / L, the concentration of Ge is 1.28g / L, and the concentrations of other impurities are shown in Table 2, and heated to 75°C , add metal oxides and water to the germanium pre-precipitation liquid, adjust the pH value to 4.5, carry out the first-stage germanium precipitation reaction of alkali for 1.5h and then filter, wash the first-stage filter residue and dry it for detection; heat the first-stage filtrate to 72°C, add metal oxide matter and water, adjust the pH value to 5, carry out the alkali second-stage germanium precipitation reaction for 2 hours, then filter, wash the second-stage filter residue and then dry it for detection, and the second-stage filtrate for detection. The test results are shown in Table 2.

[0024] Table 2 embodiment 2 detection result

[0025] ...

Embodiment 3

[0029] Take 50L sulfuric acid leaching solution from cobalt-copper smelting as the precursor solution for germanium precipitation, in which the concentration of Cu is 0.46g / L, the concentration of Fe is 3.68g / L, the concentration of Ge is 0.79g / L, and the concentrations of other impurities are shown in Table 3, and heated to 70°C , add metal oxide and water to the germanium pre-precipitation liquid, adjust the pH value to 6, carry out the alkaline one-stage germanium precipitation reaction for 1 hour and then filter, wash the first-stage filter residue and dry it for detection, heat the first-stage filtrate to 75°C and then add the metal oxide and water, adjust the pH value to 7, carry out the alkali second-stage germanium precipitation reaction for 1 hour, then filter, wash the second-stage filter residue and dry it for detection, and the second-stage filtrate for detection. The test results are shown in Table 3.

[0030] Table 3 Example 3 detection results

[0031]

[00...

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Abstract

The invention relates to a treatment method for comprehensive resource recycling of dissipated metal germanium, in particular to a treatment method for carrying out precipitation recycling on germanium through metallic oxide. According to the treatment method, the metallic oxide is adopted as a neutral precipitation agent, a two-section neutralizing hydrolysis method is adopted, and the germanium is subjected to precipitation recycling from germanium containing material liquid. Compared with an existing germanium precipitation recycling process, the advantages of the method are remarkable, the metallic oxide is adopted as the neutral precipitation agent, and the two-section neutralizing hydrolysis method is adopted for treating germanium pre-precipitation liquid; operation is easy, the residue filtering performance is good, and the quantity of added auxiliary materials is small; and the total germanium precipitation rate can reach 98% or above, the grade of obtained germanium concentrates is about 6%-8%, and extraction and comprehensive recycling of the valuable metal germanium in the germanium containing material liquid can be achieved.

Description

technical field [0001] The invention relates to a treatment method for the comprehensive resource recovery of scattered germanium metal, in particular to a treatment method for recovering germanium by metal oxide precipitation. technical background [0002] At present, the main process methods for precipitation and recovery of germanium from cobalt-copper smelting leachate and other germanium-containing liquids include: tannin precipitation method, H 2 S precipitation method and Fe-Ge co-precipitation method. The tannin precipitation method is easy to operate and has a high precipitation rate, but tannin is expensive and used in a large amount, generally 25 to 30 times the content of germanium, which is a one-time consumable, and the tannin organic matter contained in tannin will affect the subsequent The extraction process of cobalt and copper has a certain impact, and the price of tannin is relatively expensive, and the supply of tannin is limited. h 2 Although the S pr...

Claims

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Application Information

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IPC IPC(8): C22B41/00C22B3/44
CPCC22B3/44C22B41/00Y02P10/20
Inventor 沈建中韩笑孙灿
Owner ZHEJIANG HUAYOU COBALT
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