Technique for extracting germanium from germanium-containing material by pressure leaching

A technology of pressurized leaching and extraction process, applied in the direction of improving process efficiency, etc., can solve problems such as unreasonable economy, environmental pollution of flue gas, low direct leaching rate, etc., achieve process simplification, increase direct recovery rate, and high-efficiency direct leaching Effect

Active Publication Date: 2008-06-25
云南驰宏国际锗业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional germanium extraction usually adopts rotary kiln volatilization method or fuming furnace volatilization method to enrich germanium into soot, and germanium-containing soot is leached, tannin sinks germanium, and calcined to obtain germanium concentrate containing 12% to 30% germanium The deficiency o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Add the germanium-containing lead concentrate with a particle size of -300 accounting for 50% (containing germanium 30g / t), sulfuric acid 130g / l zinc electrowinning waste liquid, and oxygen-enriched air into a pressurized kettle, and control the leaching temperature to 100 Under the conditions of ℃ and 1.0 MPa, the germanium in the germanium-containing material is directly leached to obtain a germanium-containing solution. The leaching rate of germanium is 70%.

[0020] The germanium-containing solution obtained above is added to the neutralizer roasting ore for germanium precipitation, and the temperature is controlled to 60°C. When the end point pH=5, high polymer molecules of ferrogermanium are formed and co-precipitated to obtain the initial enrichment slag of germanium;

[0021] The germanium initial enrichment slag obtained above (the liquid-to-solid ratio of the germanium initial enrichment slag to the zinc electrodeposition waste liquid is 3:1) is used in...

Embodiment 2

[0023] Example 2: Adding a particle size of -400 to 80% germanium-containing zinc concentrate (containing germanium 1000g / t), sulfuric acid 200g / l zinc electrowinning waste liquid, and 90% oxygen are added to the autoclave, and the leaching temperature is controlled to 150 Under the conditions of temperature and pressure of 1.4MPa, the germanium in the germanium-containing material is directly leached to obtain a germanium-containing solution. The leaching rate of germanium is 91%.

[0024] The germanium-containing solution obtained above is added to the neutralizer zinc-rich oxide ore for germanium precipitation, and the temperature is controlled to 90°C. When the terminal pH=5.4, high polymer molecules of ferro-germanium are formed and co-precipitated to obtain the initial enrichment slag of germanium;

[0025] The germanium initial enrichment slag obtained above (the liquid-to-solid ratio of the germanium initial enrichment slag and the zinc electrodeposition waste liquid is 5:...

Embodiment 3

[0027] Example 3: Adding a particle size of -350 mesh, 60% germanium-containing zinc concentrate (germanium-containing 800g / t), sulfuric acid 170g / l zinc electrowinning waste liquid, and 80% oxygen into the pressurized kettle to control the leaching temperature Under the conditions of 120°C and 1.2 MPa, the germanium in the germanium-containing material is directly leached to obtain a germanium-containing solution. The leaching rate of germanium is 80%.

[0028] The germanium-containing solution obtained above is added to the neutralizing agent zinc oxide fume to precipitate germanium, and the temperature is controlled to 80°C. When the terminal pH=5.2, high polymer molecules of ferrogermanium are formed and co-precipitated to obtain the initial enrichment slag of germanium;

[0029] The germanium initial enrichment slag obtained above (the liquid-to-solid ratio of the germanium initial enrichment slag to the zinc electrodeposition waste liquid is 4:1) is used in the zinc electrod...

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PUM

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Abstract

The present invention relates to a germanium-containing material leaching method and a germanium extracting technique. The method comprises the following steps of adding germanium-containing materials, zinc electro deposited waste liquid, oxygen with the purity of 70-90 percent or oxygen-enriched air into a pressure reactor, controlling leaching temperature and pressure, directly leaching the germanium in the germanium-containing materials, obtaining germanium-containing solution, adding neutralizing agent into the germanium-containing solution to precipitate germanium, controlling temperature and the final pH value, forming high polymer molecules of germanium and iron for coprecipitation, obtaining first-stage enriched slag of germanium, using electro deposited waste liquid containing zinc sulfate to leach the obtained the first-stage enriched slag of germanium, controlling leaching time and temperature to effectively dissolve germanium out, obtaining germanium-enriched leaching solution, having the obtained germanium-enriched leaching solution extracted and reextracted, and obtaining germanium-containing enriched products through enriching once again. The pressurized leaching treatment of germanium-containing materials is a novel smelting method with high efficiency, low consumption and low pollution.

Description

Technical field [0001] The invention belongs to the field of rare metal metallurgy, and more specifically, relates to a method for leaching germanium-containing materials and a germanium extraction technology. Background technique [0002] Germanium is a rare precious metal, and there are few separate deposits. Most germanium is distributed in lead-zinc minerals and coal in a homogeneous or adsorbed state. In the process of polymetallic beneficiation, germanium is mainly enriched in concentrates. [0003] Conventional germanium extraction usually adopts rotary kiln volatilization method or fume furnace volatilization method to enrich germanium in the fume dust, and the germanium-containing fume dust is obtained through leaching, tanning germanium precipitation, and calcination processes to obtain germanium concentrate containing 12% to 30% germanium The disadvantages of the above process are the low direct leaching rate, unreasonable economy, the total direct yield of germanium (...

Claims

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Application Information

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IPC IPC(8): C22B41/00C22B3/04C22B3/44C22B3/26
CPCY02P10/20
Inventor 周廷熙王侃方锦王瑞山刘艳涛
Owner 云南驰宏国际锗业有限公司
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