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Method for extracting tellurium from high-selenium content silver concentrate

A technology of silver concentrate and high selenium, which is applied in the field of tellurium extraction, can solve the problems of low tellurium recovery rate and poor raw material adaptability, and achieve the effect of increasing recovery rate and reducing impact

Active Publication Date: 2015-04-15
YUNNAN COPPER CO LTD
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Problems solved by technology

[0008] In view of the above deficiencies in the prior art, the object of the present invention is to provide a method for extracting tellurium from high-selenium silver concentrate, aiming to solve the problems of poor raw material adaptability and low tellurium recovery rate in the prior art

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  • Method for extracting tellurium from high-selenium content silver concentrate
  • Method for extracting tellurium from high-selenium content silver concentrate

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Embodiment

[0039] Tellurium slag is produced by smelting in a silver-splitting furnace. When the oxidation and refining progresses to the later stage, the operator takes out the alloy from the bottom of the molten pool to judge that the silver grade in the alloy is greater than 90% and starts to produce tellurium slag. The furnace temperature is controlled at 900 ° C ~ 1200 ° C, adding Stir with 10-30kg of sodium nitrate, and add 100-200kg of sodium carbonate after the reaction is complete or while adding sodium nitrate, and stir at the same time. After the stirring is completed, shake the furnace mouth to an angle of 85 degrees to the horizontal plane, insert an ordinary welded steel pipe with a diameter of Φ20mm into the furnace, and blow compressed air into the furnace to blow the slag for 2 hours. After the reaction is complete, take out the oxidation air pipe, replace the slag bag, observe the situation in the furnace and carry out the slag removal operation. The recovery rate of the...

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Abstract

The invention discloses a method for extracting tellurium from high-selenium content silver concentrate. The method comprises the steps of during the process of carrying out tellurium slag production on the silver concentrate in a silver separation furnace, adding sodium nitrate and soda so as to oxidize tellurium and selenium and produce sodium tellurite and sodium selenite, carrying out reduction smelting and oxidation refining in the same silver separation furnace, and obtaining tellurium slag in an oxidizing period.

Description

technical field [0001] The invention relates to the technical field of tellurium extraction, in particular to a method for extracting tellurium from high-selenium silver concentrate. Background technique [0002] In recent years, with the increasingly fierce market competition, copper concentrate processing fees have been falling continuously, and there is no pricing power for metal copper in China. Therefore, my country's copper smelting enterprises are in the sandwich layer of the copper industry chain, and the survival space of enterprises is small. Therefore, it is the key to ensure the survival and development of copper smelting enterprises to vigorously develop the comprehensive recovery of valuable elements in copper concentrate, especially the recovery technology of non-valuable element tellurium in copper concentrate. [0003] Tellurium in copper concentrate is converted to Ag in the process of copper smelting 2 Te, Cu 2 Te, Au 2 Te and other forms are enriched i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/02
Inventor 徐养良张继润王宪法沙梅刘伟明杨勇王鹏程胡一平
Owner YUNNAN COPPER CO LTD
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