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A method for extracting tellurium from copper anode slime

A technology for anode slime and copper slag, which is applied in the direction of element selenium/tellurium and the improvement of process efficiency, can solve the problems of low tellurium recovery rate and complicated process, and achieve the effects of low cost, high metal recovery rate and simple process.

Active Publication Date: 2020-05-12
JIANGXI COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are suitable for materials with low tellurium content. It is necessary to obtain the tellurium-containing materials first, and then leaching them out for recovery, so there are problems of complicated process and low recovery rate of tellurium.

Method used

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  • A method for extracting tellurium from copper anode slime
  • A method for extracting tellurium from copper anode slime
  • A method for extracting tellurium from copper anode slime

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A method for extracting tellurium from anode slime, comprising the steps of:

[0040] (1) The calcined sand obtained by sulphating and roasting the anode sludge is added to the sulfuric acid solution according to the solid-liquid ratio of the calcined sand and the sulfuric acid solution at 200g / L, and the leaching reaction is carried out at a temperature of 70°C for 120 minutes. After solid-liquid separation , to obtain copper-separating liquid and copper-separating slag. Wherein, the content of sulfuric acid in the sulfuric acid solution is 20g / L. After testing, the copper separation solution contained 37.37g / L copper, 7.37g / L silver, and 0.39g / L tellurium, and the copper separation slag contained 0.44wt% copper and 6.72wt% tellurium.

[0041] (2) Add the copper-separating slag into the mixed solution of hydrochloric acid and sulfuric acid according to the solid-to-liquid ratio of the copper-separating slag and the mixed solution at 200g / L, and carry out chlorination ...

Embodiment 2

[0046] A method for extracting tellurium from anode slime, comprising the steps of:

[0047] (1) The calcined sand obtained by sulphating and roasting the anode slime is added to the sulfuric acid solution for leaching reaction according to the solid-liquid ratio of the calcined sand and the sulfuric acid solution at 250g / L. After solid-liquid separation, the copper separation liquid and Divide copper slag. Wherein, the content of sulfuric acid in the sulfuric acid solution is 15g / L, the reaction temperature is 80°C, and the reaction time is 100min. After testing, the copper in the copper separation solution is 42.4g / L, the silver is 10.2g / L, and the tellurium is 0.47g / L. The copper separation slag contains 0.74wt% copper and 7.59wt% tellurium.

[0048] (2) Add the copper-separating slag into the mixed solution of hydrochloric acid and sulfuric acid according to the solid-liquid ratio of the copper-separating slag and the mixed solution at 150g / L, and use sodium chlorate as t...

Embodiment 3

[0053] A method for extracting tellurium from anode slime, comprising the steps of:

[0054] (1) The calcined sand obtained by sulphating and roasting the anode slime is added to the sulfuric acid solution for leaching reaction according to the solid-liquid ratio of the calcined sand and the sulfuric acid solution at 250g / L. After solid-liquid separation, the copper separation liquid and Divide copper slag. Wherein, the content of sulfuric acid in the sulfuric acid solution is 25g / L, the reaction temperature is 80°C, and the reaction time is 60min. After testing, the copper in the copper separation liquid is 55.2g / L, the silver is 11.25g / L, and the tellurium is 0.23g / L. In the copper separation slag, the copper is 0.81wt%, and the tellurium is 5.95wt%.

[0055] (2) Add the copper-separating slag into the mixed solution of hydrochloric acid and sulfuric acid according to the solid-liquid ratio of the copper-separating slag and the mixed solution at 250g / L, and use sodium chlor...

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Abstract

The invention belongs to the technical field of hydrometallurgy of nonferrous metals, and particularly relates to a method for extracting tellurium from copper anode mud. In the method, the telluriumin a complex solution remains in the solution by selective reduction, and then the tellurium in the solution is recycled by means of a reductive method. The method has the advantages of: with the roasted sand, generated by sulfating roasting of the copper anode mud, being a raw material, low-concentration sulfuric acid leaching is carried out for separating copper and a part of silver, tellurium being enriched in the copper separation residue; then, gold, platinum, palladium and tellurium are respectively recycled from a chlorination leachate of the copper separation residue. The method overcomes the technical problem of separation of the tellurium and other noble metals from the complex multi-metal solution containing high-concentration tellurium. In the process of successively reducing the gold, platinum and palladium in prior, the tellurium remains in the solution, and then the tellurium in the solution is reduced and recycled by means of existing technologies. The method is good inselective separation effect and high in metal recycling rate, has simple process and low cost and is easy to industrialize.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal hydrometallurgy, and in particular relates to a method for extracting tellurium from copper anode slime. Background technique [0002] Tellurium is mainly associated with minerals such as copper and lead. Therefore, the production of tellurium is mainly in the comprehensive recovery of heavy metals such as copper and lead, especially in the comprehensive recovery of tellurium in the copper smelting process. The comprehensive recovery of tellurium in the process of heavy metal smelting almost always adopts wet process, that is, the intermediate material rich in tellurium produced in the process of heavy metal smelting is leached, so that tellurium enters the solution, and then the tellurium is separated and recovered from the solution. [0003] The leaching of tellurium-containing intermediate materials generally adopts hydrochloric acid leaching or sulfuric acid leaching. Since tellurium ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B11/00C01B19/02
CPCC01B19/02C22B7/007C22B11/042Y02P10/20
Inventor 黄绍勇邓成虎孙敬韬梁柱俊林文兵汪琳琪周佳周利明文婷
Owner JIANGXI COPPER
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