Method for comprehensively extracting valuable metals from tellurium-containing polymetallic materials

A technology for comprehensive extraction of valuable metals, which is applied in the field of hydrometallurgical process and comprehensive extraction of valuable metals, can solve the problems of difficult-to-handle grades, low tellurium-containing materials, and high production costs, and achieve reduced production costs and high tellurium recovery rates , The effect of saving technology

Inactive Publication Date: 2012-09-26
HUNAN JINWANG BISMUTH
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Problems solved by technology

[0003] The leaching of the above two methods requires acid oxidation leaching, and a large amount of oxidant must be added, the production cost is high, and the production process has the disadvantage of producing a large amount of slag, which makes it difficult to process low-grade tellurium-containing materials. Therefore, a non-return material has been developed. , The tellurium extraction process that can comprehensively recover valuable metals is of great significance

Method used

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  • Method for comprehensively extracting valuable metals from tellurium-containing polymetallic materials
  • Method for comprehensively extracting valuable metals from tellurium-containing polymetallic materials

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] The composition of the tellurium-containing smelting slag used in this embodiment is as follows:

[0027] Pb22.27%, Cu12.06%, Te5.74%, Bi27.1%, Ag3.2024%;

[0028] The technological steps of extracting refined tellurium from the above-mentioned tellurium-containing smelting slag and comprehensively recovering valuable metals are shown in the appendix figure 1 .

[0029] The specific process and process parameters are as follows:

[0030] a. Oxidation leaching

[0031] Large pieces of tellurium-containing polymetallic materials are crushed by a crusher to a particle size of less than 3cm; then ground by a wet ball mill, and the particle size is required to be below 150 mesh; nitric acid is used as an oxidant and leaching agent to leach lead, copper, bismuth, silver, and tellurium. Let all the valuable metals enter the soluti...

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Abstract

The invention relates to a method for comprehensively extracting valuable metals from tellurium-containing polymetallic materials, and belongs to hydrometallurgy. The method comprises the steps of carrying out ball milling on the tellurium-containing polymetallic materials, carrying out oxidation leaching by using nitric acid, adding sodium sulfate to separate lead from the solution in a form of lead sulfate; adding industrial salt to precipitate silver in a form of silver chloride; reducing tellurium ions to crude tellurium powder by using sodium sulfite and the industrial salt and obtaining refined tellurium by using an electrolytic deposition method; and depositing bismuth by using caustic soda and depositing copper by using the electrolytic deposition method in the tellurium reduced solution, so as to realize the comprehensive recovery. The method disclosed by the invention has the advantages of high tellurium recovery rate, has good separating effect of copper, lead, bismuth, tellurium and silver, has no return slag and is suitable for treating low-grade tellurium-containing polymetallic materials.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy, relates to a hydrometallurgical process, in particular to a method for comprehensively extracting valuable metals from tellurium-containing polymetallic materials. Background technique [0002] Tellurium is a rare element with extremely low levels in nature. Its average content in the Earth's crust is about 1×10 -7 %, it is difficult to form a single deposit. At present, tellurium is mainly extracted from soda slag produced by tellurium polymetallic ore or silver oxidation refining and tellurium slag produced by bismuth refining, such as: on February 2, 2000, Chinese invention patent application publication number CN 1243098A, published A precise process method for extracting tellurium polymetallic ores is proposed, including hydrochloric acid oxidative leaching of the ore, the leaching solution is reduced with sulfur dioxide gas and coarse powder tellurium is precipitated, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B3/46C22B13/00C22B11/00C22B30/06C22B15/00C01B19/02
CPCY02P10/20
Inventor 陈力均曹永燃吴祖祥
Owner HUNAN JINWANG BISMUTH
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