Method for extracting refined tellurium from tellurium-contained smelting slag

A technology for smelting slag and extracting essence, which is applied in the field of extracting refined tellurium, can solve the problems of low leaching rate, increase operating procedures and costs, and increase the difficulty of recycling, etc., and achieve high leaching rate, reduce ineffective consumption, and save production costs Effect
CN101565174AInactive Publication Date: 2009-10-28YONGXING XINTAI SILVER IND
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
YONGXING XINTAI SILVER IND
Publication Date
2009-10-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for extracting refined tellurium from tellurium-contained smelting slag, which is characterized in that the method comprises the following steps of: oxidizing and leaching inorganic acid, replacing noble metal with a copper plate, depositing the copper by sodium sulfide, counteracting and depositing tellurium, alkaline leaching coarse TeO2, removing impurities by Na2S, concentrating and electrowinning. The method has the advantages of high recovery rate for tellurium, comprehensive and effective recovery of other useful metals, and suitably treating the tellurium-contained waste slag with high water content and small granularity generated in the metallurgy process by a wet-method.
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Description

Technical field

[0001] The invention relates to a method for extracting refined tellurium from tellurium-containing smelting slag. technical background

[0002] The No. 52 element tellurium belongs to the group VI oxygen group element in the periodic table of elements, and its nature is a semi-metal, and its content in nature is extremely low. According to relevant literature reports, its content in the crust is 0.0006ppm, and it is dispersed in various parts of the crust. It is difficult to form ore deposits, but tellurium has a wide range of uses, such as additives in iron and steel metallurgy, protective sleeves for submarine cables, vulcanizing agents in the rubber industry, and catalysts in petrochemical industries. In recent years, with the development of science and technology, tellurium has been widely used in new energy and new materials, such as new energy battery cadmium-tellurium battery, new computer storage materials, photoelectric conversion film of TV camera ...

Claims

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