Method for extracting gallium and germanium from zinc smelting slag

A technology of zinc smelting slag and extraction method, which is applied in the field of extracting gallium and germanium from zinc smelting slag, to achieve the effects of reducing acid consumption, saving alkali consumption and reducing waste water discharge

Inactive Publication Date: 2012-07-11
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This extraction process will cause a lot of acid and alkali consumption and generate a lot of waste water

Method used

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  • Method for extracting gallium and germanium from zinc smelting slag
  • Method for extracting gallium and germanium from zinc smelting slag
  • Method for extracting gallium and germanium from zinc smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The dilute metal-enriched slag used in the experiment is the dilute metal-enriched slag obtained from the pressure leaching solution of zinc concentrate by lime neutralization-zinc powder replacement method, and its chemical composition is shown in Table 1.

[0025] Table 1 Chemical composition of scattered metal-enriched slag

[0026] element Ca Zn Cu Fe S Pb Sb Sn Ga Ge content(%) 19.2 16.58 11.71 5.77 16.3 1.21 0.71 0.17 0.25 0.22

[0027] The first stage leaching conditions are: take 200g of the above-mentioned scattered metal-enriched slag, add 600mL of water, add an appropriate amount of sulfuric acid, keep the pH of the solution in the range of 1.8~2.2, keep stirring and blowing air, the leaching temperature is 60~80℃, and the leaching temperature is 60~80℃. Time 6 hours.

[0028] The results of the leaching experiment:

[0029] Table 2 The results of the first stage leaching experiment

[0030]

Embodiment 2

[0032] The leaching conditions of the second stage are: take 100 g of the leaching residue obtained by the first stage leaching, add 200 mL of the raffinate after germanium extraction as a leaching agent, the raffinate used as a leaching agent contains 45 g / L of sulfuric acid, and the leaching temperature is 60~80 ° C , Supplementing sulfuric acid appropriately during the leaching process, so that the sulfuric acid content of the leaching solution is maintained in the range of 40~60g / L, and the leaching time is 6 hours. The leaching rate of germanium in the second stage is 99.1%.

Embodiment 3

[0034] Using the gallium-containing leaching solution obtained by the first stage leaching, the solution obtained after removing copper by sulfide precipitation is the feed solution,

[0035] (1) Extraction conditions

[0036] Gallium extraction liquid composition Ge 0.016g / L, Ga 0.81g / L, Zn 19.7g / L, Fe 1.64g / L H 2 SO 4 3.2g / L.

[0037] The organic phase consists of:

[0038] Extraction agent: O,O-diisooctylphosphohydroxamic acid, accounting for 10% (v / v)

[0039] Modifier: Isooctanol, 5% (v / v)

[0040] Thinner: 260 # Sulfonated kerosene, accounting for 85% (v / v).

[0041] Compared: O / A=1:2

[0042] Mixing time: 5min

[0043] (2) Extraction results

[0044] The phase separation time was 4 min., the distribution ratio of gallium in the organic phase to the aqueous phase was 60.5, the extraction rate of gallium was 96.8%, and the extraction rate of zinc was 0.4%, indicating that the extraction rate of gallium was very high, and zinc was basically extracted.

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Abstract

The invention relates to a method for extracting gallium and germanium from zinc smelting slag, in particular to a method for wet extraction of gallium and germanium metals from zinc smelting slag. The method is characterized in that: in the extraction process, the zinc smelting slag is subjected to two-stage acid leaching, the gallium is leached out in the first stage, and then the acid leaching slag after the gallium is leached out is subjected to the second-stage acid leaching, so that the germanium is leached out. According to the method, the leaching characteristics of scattered metal enriched slag gallium and germanium and the extraction characteristics of the gallium and the germanium are found in experiments, a process flow that the gallium and the germanium are leached out and extracted by steps to enrich the gallium and the germanium is provided, so that the germanium leaching and extraction form a closed loop, the alkali neutralization work procedure is eliminated, the alkali consumption is eliminated, the acid consumption is reduced, and the wastewater drainage is reduced.

Description

technical field [0001] A method for extracting gallium and germanium from zinc smelting slag relates to a method for wet extraction of metal gallium and germanium from zinc smelting slag. Background technique [0002] Gallium and germanium are rare metals. There are few separate deposits in nature, and most of them are associated with other minerals. Gallium and germanium are mainly found in sphalerite, nepheline, muscovite, spodumene, bauxite and coal mines. In the traditional zinc hydrometallurgy process, more than 98% of gallium and germanium are enriched in neutral leaching or low-acid leaching residue, and the comprehensive recovery value is extremely high. The comprehensive recovery of scattered metals in the zinc smelting process is an important way to obtain gallium and germanium. The comprehensive extraction of gallium and germanium can not only make full use of mineral resources, reduce production costs, improve economic benefits, but also reduce environmental poll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B58/00C22B41/00
CPCY02P10/20
Inventor 林江顺王玉芳王海北蒋训雄汪胜东赵磊冯爱玲冯亚平邹小平闫丽李相良苏立峰
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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