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Efficient method for enriching rhenium from high-arsenic copper sulfide material containing rhenium

A copper sulfide enrichment technology, applied in the direction of improving process efficiency, can solve the problems of small specific volume, low cost, short process, etc., and achieve the effect of simple operation, strong material adaptability and high leaching rate

Inactive Publication Date: 2016-08-17
KUNMING METALLURGY COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is a comprehensive recovery process with concise process, short process, small specific volume, low cost and low pollution. There are no relevant reports at home and abroad.
[0018] These processes are mainly to separate and recover rhenium from leaching raw ore, spent catalyst, waste liquid and soot. The method of using pressurized alkaline leaching-metal powder replacement rhenium to enrich rhenium from high-arsenic copper sulfide raw materials has not been reported yet.

Method used

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  • Efficient method for enriching rhenium from high-arsenic copper sulfide material containing rhenium

Examples

Experimental program
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Effect test

Embodiment 1

[0030] See attached figure 1 , conditions: 100 grams of rhenium-rich slag, the ratio of potassium hydroxide is 100% of the weight ratio of rhenium-rich slag, after pulping, pressurized leaching: solid-liquid ratio 8:1, leaching time 1 hour, leaching temperature 100 ° C, The stirring speed is 150 rpm, and the oxygen partial pressure is 0.7MPa. After the reaction, it was taken out and filtered, washed with 200 ml of water, and the leached residue was dried and then sent for analysis. Under these conditions, the leaching rate of rhenium was 98.7%, and the pH of the leaching solution was 12.5. For the leaching solution, metal powder is used to replace and enrich rhenium. The conditions are: the amount of active aluminum metal powder is 2.0 times the theoretical amount, the replacement temperature is 60°C, the time is 4.0h, and the replacement rate is 95.15%. The enrichment ratio of rhenium in the whole process is 35.12%, and the recovery rate is 93.91%.

Embodiment 2

[0032] See attached figure 1 , Conditions: 100 grams of rhenium-rich slag, the proportion of sodium hydroxide is 80% of the weight ratio of rhenium-rich slag, after pulping, pressurized leaching: solid-liquid ratio 5:1, leaching time 2 hours, leaching temperature 120 ° C, The stirring speed is 150 rpm, the oxidizing agent is industrial oxygen, and the partial pressure of oxygen is 0.5 MPa. After the reaction, it was taken out and filtered, washed with 200 ml of water, and the leached residue was dried and then sent for analysis. Under these conditions, the leaching rate of rhenium is 98.9%; the pH of the leach solution is 13.0. For the leaching solution, metal powder is used to replace and enrich rhenium. The conditions are: the amount of active zinc metal powder is 3.0 times the theoretical amount, the replacement temperature is 70 ° C, the time is 3.0 h, and the replacement rate is 95.67%. The enrichment ratio of rhenium in the whole process is 36.17%, and the recovery rat...

Embodiment 3

[0034] See attached figure 1 , Conditions: 100 grams of rhenium-rich slag, the ratio of potassium hydroxide is 70% of the weight ratio of rhenium-rich slag, after pulping, pressurized leaching: solid-liquid ratio 7:1, leaching time 4 hours, leaching temperature 140 ° C, The stirring speed is 150 rpm, the oxidant is air oxygen, and the partial pressure of oxygen is 0.6 MPa. After the reaction, it was taken out and filtered, washed with 200 ml of water, and the leached residue was dried and then sent for analysis. Under these conditions, the leaching rate of rhenium was 97.9%; the pH of the leach solution was 12.0. For the leaching solution, metal powder is used to replace and enrich rhenium. The conditions are: the amount of active aluminum metal powder is 4.0 times the theoretical amount, the replacement temperature is 50 ° C, the time is 2.0 h, and the replacement rate is 94.90%. The enrichment ratio of rhenium in the whole process is 34.28%, and the recovery rate is 92.91%...

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Abstract

The present invention discloses an efficient method for enriching rhenium from high-arsenic copper sulfide material containing rhenium. The process is as below: mixing rhenium-enriched slag with a certain amount of alkali into a slurry; pressurizing, heating and leaching alkali; filtering and washing; and sending ammonium rhenium in the form of ammonium rhenate and arsenic in the form of sodium arsenite into a leaching solution. The method uses reactive metal powder heating for replacement of rhenium in the leaching solution; and filtering and washing are carried out to obtain the enrich rhenium oxide and achieve separation of rhenium and arsenic. The raw material is rhenium-enriched slag obtained by sulfide precipitation of waste acid in produced the production of copper smelting enterprises, wherein the slag contains large amount of copper and arsenic. By the process, rhenium can be completely leached, while the metal powder substituties the leaching solution to obtain rhenium-enriched material. The method simplifies subsequent rhenium extraction procedure and reduces the cost of rhenium extraction. The invention has the advantages of simple and short process, high enrichment rate, strong adaptability of raw materials, low cost, easiness to industrialization and good application value, and can increase value and profits copper smelting enterprises.

Description

technical field [0001] The invention belongs to the field of rare metal leaching hydrometallurgy, and relates to a method for efficiently enriching rhenium from rhenium-containing high-arsenic copper sulfide raw materials. Background technique [0002] China is the country that produces the most copper in the world. It produces a large amount of rhenium-containing polluted acid every year. After sulfide precipitation, a large amount of rhenium-rich slag is produced. The rhenium content is 0.3~5%, and its value is relatively high. Now major copper smelting enterprises pay more attention to the extraction and recovery of rhenium. In order to recover rhenium better, the research invented a method. [0003] Li Weichang introduced in "China Molybdenum Industry" Vol. 31 No. 1 in 2005 that the research determined that the rhenium in the molybdenum concentrate roasting fume can be recovered by hydrogen peroxide leaching, and obtained the conditions suitable for leaching rhenium thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B3/12C22B3/46C22B61/00
CPCY02P10/20
Inventor 范兴祥唐红翔姚春玲
Owner KUNMING METALLURGY COLLEGE
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