Recovery technology of tellurium from complex solution through carrier method

A carrier and complex technology, applied in the process field of tellurium recovery by the carrier method, to achieve the effect of simple equipment, large carrier capacity and wide applicability

Active Publication Date: 2018-03-02
YONGXING XINGCHENG METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of separating and extracting tellurium one by one from the complex system solution where multiple elements coexist has not yet been reported

Method used

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  • Recovery technology of tellurium from complex solution through carrier method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The process of recovering tellurium from a complex solution using a carrier method includes the following steps:

[0060] (1) Use tellurium-containing materials as raw materials, according to the liquid-solid ratio of 30L: 10kg, add hydrochloric acid and hydrogen peroxide for oxidative leaching, the concentration of hydrochloric acid is 200g / L, the mass concentration of hydrogen peroxide is 15%, the reaction temperature is 90°C, and the reaction time is 3h After the reaction is completed, the lead-containing precious metal-enriched slag and complex leachate are separated, and the reaction end point is controlled: the tellurium content of the lead-containing precious metal-enriched slag is less than 0.5%, and the terminal potential of the complex leachate is 700mV;

[0061] (2) Add a carrier to the complex leaching solution described in step (1), the added mass of the carrier is 1.5 times the tellurium content in the complex leaching solution, the reaction temperature is ...

Embodiment 2

[0072] The process of recovering tellurium from a complex solution using a carrier method includes the following steps:

[0073] (1) Use tellurium-containing materials as raw materials, add hydrochloric acid and hydrogen peroxide for oxidative leaching according to the liquid-solid ratio of 40L: 10kg, the concentration of hydrochloric acid is 220g / L, the mass concentration of hydrogen peroxide is 16%, the reaction temperature is 95°C, and the reaction time is 2.5h After the reaction is completed, the lead-containing precious metal-enriched slag and the complex leach solution are separated, and the reaction end point is controlled: the tellurium content of the lead-containing precious metal-enriched slag is less than 0.5%, and the terminal potential of the complex leach solution is 720mV;

[0074] (2) Add a carrier to the complex leaching solution described in step (1), the added mass of the carrier is 1.8 times of the tellurium content in the complex leaching solution, the reac...

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Abstract

The invention relates to a recovery technology of tellurium, and particularly discloses a recovery technology of tellurium from a complex solution through a carrier method. By means of the technology,tellurium is leached by controlled potentials under an acidic condition, separation of tellurium and precious metals is achieved, and the precious metals can be made to be enriched; according to theatomic radius coprecipitation principle, by using the phenomenon of carrier hydrolysis coprecipitation, separation of tellurium and other metals is achieved; through acidic atmospheric pressure leaching and reduction of sulfur dioxide, separation of tellurium and a carrier is achieved; and other metals are separated through a coagulation technology, so that the other metals are recycled synthetically, and a leaching solution can be regenerated. By means of the technology, tellurium is enriched from the complex leaching solution through the carrier method, the carrier is high in specificity andwide in applicability, and incomplete separation caused by a disproportionation reaction of copper when tellurium and copper are subjected to reduction commonly is avoided specially; the carrier capacity is large, and the enrichment ratio tellurium can be up to 95%; and the whole technology further has the characteristics of being simple in equipment, safe, environment-friendly, low in productioncost and high in yield.

Description

technical field [0001] The invention belongs to the technical field of metal recovery, and relates to a process for recovering tellurium, in particular to a process for recovering tellurium from a complex solution using a carrier method. Background technique [0002] Currently in the metallurgical industry, there are many sections that produce tellurium-containing enriched slag. For example, the alkali slag produced in the bismuth refining process; the alkali slag and yellow slag produced in the lead alloy tin stirring and impurity removal process; the soda slag produced by reverberatory furnace smelting; the soot produced in blast furnace smelting; Mud; tellurium-containing concentrates replaced by iron powder, etc. [0003] In the leaching separation experiment and production process of tellurium, predecessors have done a lot of work, including roasting method, high pressure leaching method, extraction method, electrowinning method, multiple staged reduction method, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C01B19/02C22B15/00
CPCC01B19/02C22B7/007C22B15/0071Y02P10/20
Inventor 王青柏
Owner YONGXING XINGCHENG METAL CO LTD
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