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Method for recovering germanium from germanium-containing smoke dust

A germanium fume and fume technology, applied in the field of hydrometallurgy, can solve the problems of low recovery rate of germanium, low recovery rate, large acid consumption, etc.

Active Publication Date: 2011-09-14
LINCANG JIECAIBA COAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such a low recovery rate causes the limited germanium resources to not be fully utilized, and secondly, it is difficult to recover germanium from acid slag in the later stage, and the long-term storage of acid slag causes environmental pollution.
[0005] Tetragonal GeO 2 and GeO, GeS, GeS 2 、 Ge 2 S 3 、GeO 2 .SiO 2 The soot of germanium in other forms is not fully combusted, the volatile content is higher, the acid insoluble part is higher, and the grade of germanium is lower. The amount is too large, the amount of waste acid to be treated is large, and the treatment cost is high

Method used

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  • Method for recovering germanium from germanium-containing smoke dust
  • Method for recovering germanium from germanium-containing smoke dust

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Step 1: Take 250g of germanium-containing fume in a 3000ml beaker. The germanium content of the fume is 1.33%, and the germanium metal of the fume is 3.325g. Add 125mL of water and 37.5g of industrial sulfuric acid, stir evenly to form a paste, heat to 65°C, and place Make the soot aging reaction for 1h. Then add 750mL of water, place it on a temperature-controlled electric furnace, start a mechanical stirrer, set the stirring speed at 115 rpm, heat up to 85°C, and stir for leaching for 1.5h. After leaching, vacuum filter, wash the filter residue with 50mL of boiling water, the washing liquid and the filtrate are combined into the leachate to obtain 860mL of the leachate, and the filter residue is transferred to the original beaker.

[0043] The second step: add 37.5g of industrial sulfuric acid to the filter residue obtained in the first step, stir evenly to form a paste, heat to 65°C, and let the smoke and dust mature for 1 hour. Then add 750mL of water, put it on th...

Embodiment 2

[0052] Step 1: Take 250g of germanium-containing fumes in a 3000ml beaker. The germanium content of the fumes is 5.43%, and the germanium metal of the fumes is 13.575g. Add 125mL of water and 50.0g of industrial sulfuric acid. Make the soot aging reaction for 1.5h. Then add 1000mL of water, place it on a temperature-controlled electric furnace, start a mechanical stirrer, set the stirring speed at 115 rpm, heat up to 85°C, and stir for leaching for 2.0h. After leaching, vacuum filter, wash the filter residue with 50mL of boiling water, the washing liquid and the filtrate are combined into the leachate to obtain 1040mL of the leachate, and the filter residue is transferred to the original beaker.

[0053] In the second step, 50.0 g of industrial sulfuric acid is added to the filter residue obtained in the first step, stirred evenly to form a paste, heated to 65° C., and left to allow the soot to mature for 1.5 hours. Then add 1000mL of water, put it on the electric furnace, st...

Embodiment 3

[0062] Step 1: Take 250g of germanium-containing fume in a 3000ml beaker. The germanium content of the fume is 9.17%, and the germanium metal of the fume is 22.925g. Add 125mL of water and 62.5g of industrial sulfuric acid. Stir to form a paste, heat to 70°C, and place Make the soot aging reaction for 2h. Then add 1250mL of water, place it on a temperature-controlled electric furnace, start a mechanical stirrer, set the stirring speed at 115 rpm, heat up to 85°C, and stir for leaching for 2.5h. After leaching, vacuum filter, wash the filter residue with 50mL of boiling water, the washing liquid and the filtrate are combined into the leachate to obtain 1260mL of the leachate, and the filter residue is transferred to the original beaker.

[0063] The second step: add 62.5g of industrial sulfuric acid to the filter residue obtained in the first step, stir evenly to form a paste, heat to 70°C, and let the soot mature for 2 hours. Then add 1250mL of water, put it on the electric f...

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Abstract

The invention relates to a method for recovering germanium from germanium-containing smoke dust, in particular to a method for leaching the germanium-containing smoke dust by using sulfuric acid and sodium hydroxide sequentially and recovering the germanium from the germanium-containing smoke dust by hydrochloric acid distillation, and relates to the technical field of wet-process metallurgy. The method is realized by processes of leaching by the sulfuric acid twice, leaching by the sodium hydroxide twice, neutralizing leachate, performing evaporating and concentrating, chloridizing and distilling, preparing germanium dioxide and the like. In the method for recovering the germanium, the recovery rate of the germanium is more than 93 percent, so the successful study of the method has a great positive significance for the solving of problems of low recovery rate, high recovery cost and low resource utilization rate of the germanium in the germanium-containing smoke dust, a problem that distillation residues are needed to be processed repeatedly and a problem that environmental pollution is serious and the like.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering germanium in the germanium-containing fume by distilling the germanium-containing fume through sulfuric acid leaching to sodium hydroxide leaching for pretreatment. Background technique [0002] In the process of enriching and extracting germanium from germanium-containing lignite by fire method, when the germanium monoxide volatilization temperature is higher than 710°C, germanium mainly volatilizes into the dust collection system in the form of GeO, and most of the GeO It is oxidized by oxygen to form GeO 2 , adhere to the surface of coal soot particles after the temperature is lowered, and a small amount of unoxidized GeO also adheres to the surface of soot particles as the temperature decreases, and part of germanium volatilizes in the form of sulfide in germanium soot. Therefore, in coal soot, germanium except GeO 2 In addition to the existe...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B3/04C22B3/20C22B41/00
CPCY02P10/20
Inventor 刘强何文智俸廷兰
Owner LINCANG JIECAIBA COAL IND
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