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Process method for recovering indium and germanium from germanium concentrate

A process method, technology of germanium concentrate, applied in the field of indium recovery by P204 extraction method

Inactive Publication Date: 2012-03-28
YUNNAN DONGCHANG METAL PROCESSING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] What the present invention is to solve is the problem of extracting and recovering indium germanium from germanium concentrate, and provides a process method for recovering indium germanium from germanium concentrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: A germanium concentrate, the content of germanium is 5.8%, the content of indium is 4550g / t, and it is processed to recover indium and germanium. The specific process includes the following steps.

[0018] (1) Chloride leaching and distillation of germanium concentrate: Take 100kg of germanium concentrate and add 85Okg of 8.2mol / L hydrochloric acid to a 1000L reaction kettle, heat to 70-75°C for 2 hours, and then leaching at 95-110°C Distillation is carried out under certain conditions to separate germanium tetrachloride and distillation raffinate, the germanium tetrachloride is rectified to obtain high-purity germanium dioxide, and the distillation raffinate is used for subsequent treatment.

[0019] (2) Double-alkali neutralization of the distillation raffinate: first neutralize the distillation raffinate with anhydrous sodium carbonate to a pH value of 3.6, and then neutralize it with a 70% mass percent sodium hydroxide solution to a pH value 7.4. After...

Embodiment 2

[0022] Example 2: A germanium concentrate, with a germanium content of 6.88% and an indium content of 7670g / t, is processed to recover indium and germanium. The specific process includes the following steps.

[0023] (1) Chloride leaching and distillation of germanium concentrate: Take 100kg of germanium concentrate in a 1000L reaction kettle, add 960kg of 8.7mol / L hydrochloric acid, heat to 80°C for 2 hours, and then leaching at 95-110°C Distillation is carried out under certain conditions to separate germanium tetrachloride and distillation raffinate, the germanium tetrachloride is rectified to obtain high-purity germanium dioxide, and the distillation raffinate is used for subsequent treatment.

[0024] (2) Double-alkali neutralization of the distillation raffinate: first neutralize the distillation raffinate with anhydrous sodium carbonate to a pH value of 3.9, and then neutralize it with a mass fraction of 70% sodium hydroxide solution to a pH value of 7.6 , Stir evenly a...

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PUM

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Abstract

The invention discloses a process method for recovering indium and germanium from germanium concentrate, which relates to the technical field of wet-process metallurgy, in particular to a process method for recovering indium from hydrochloric distillate of the germanium concentrate by using bi-alkali neutralization and then using a P204 extraction method. The process method provided by the invention comprises the steps of chlorination leaching and distillation of the germanium concentrate, bi-alkali neutralization of the distillate and recovery of the indium and germanium in the neutralized residues. By using the method, the recovery rate of the indium can be up to 90.5-95.5% and the recovery rate of the germanium in the distillate can be up to 85.0-90.0%.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a process method for recovering indium from germanium concentrate hydrochloric acid distillation raffinate by double alkali neutralization and then P204 extraction. Background technique [0002] Germanium concentrates generally do not contain indium metal. Therefore, there have been few studies on the process of recovering indium from germanium concentrates. However, it has recently been found that germanium concentrates produced in some areas contain 4-10% of germanium metals. , and also contains 800-7000g / t indium metal, which has high economic value. Therefore, it is worth studying to study the efficient extraction of indium from germanium concentrate. After a large number of exploratory experiments, a more feasible and efficient process method for extracting indium from germanium concentrate has been found, and a production line can be established. Contents of the i...

Claims

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Application Information

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IPC IPC(8): C22B41/00C22B58/00C22B3/10C22B3/22C22B3/38C22B3/46C22B7/04
CPCY02P10/20
Inventor 普世坤朱知国尹国文
Owner YUNNAN DONGCHANG METAL PROCESSING
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