Method for leaching selenium and tellurium from waste anode copper slime and method for extracting selenium and tellurium

A technology of waste miscellaneous copper anode slime and anode copper, which is applied in the direction of elements such as selenium/tellurium, can solve the problems that the leaching rates of selenium and tellurium are difficult to balance, the leaching rate of tellurium is not high, and the leaching rate of selenium is not high, and the processing time is short, The process is simple and the effect of environmental friendliness

Active Publication Date: 2021-02-26
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, in the oxygen pressure acid leaching copper anode slime process, it is difficult to balance the leaching rates of selenium and tellurium. If the leaching rate of selenium is high, the leaching rate of tellurium is not high, and if the leaching rate of tellurium is high, the leaching rate of selenium is not high.
Therefore, in the existing process, another process needs to be supplemented to recover selenium and tellurium from the acid leaching residue, and the process cost is high.

Method used

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  • Method for leaching selenium and tellurium from waste anode copper slime and method for extracting selenium and tellurium
  • Method for leaching selenium and tellurium from waste anode copper slime and method for extracting selenium and tellurium

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Experimental program
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Effect test

Embodiment 1

[0050] The method for leaching selenium and tellurium from waste miscellaneous anode copper slime provided by the present embodiment is specifically:

[0051] One-stage dilute acid leaching: Put the waste miscellaneous copper anode slime in an acid-resistant autoclave for one-stage dilute acid oxygen pressure leaching. The liquid-solid ratio is controlled at 10mL / g, the temperature is 150°C, the sulfuric acid concentration is 50g / L, It is 1.5Mpa, and the time is 2h. The first dilute acid leaching slag contains Cu, Se and Te respectively 0.40%, 1.14% and 0.94%.

[0052] Second-stage concentrated acid leaching: put the first-stage dilute acid leaching residue in an acid-resistant autoclave for two-stage concentrated acid oxygen pressure leaching. The liquid-solid ratio is controlled at 20mL / g, the temperature is 150°C, the sulfuric acid concentration is 90g / L, The partial pressure is 1.5Mpa, and the time is 2h. The secondary concentrated acid leaching slag contains 0.038%, 0.3...

Embodiment 2

[0054] The method for leaching selenium and tellurium from waste miscellaneous anode copper slime provided by the present embodiment is specifically:

[0055] One-stage dilute acid leaching: Put the waste miscellaneous copper anode slime in an acid-resistant autoclave for a stage of weak acid oxygen pressure leaching. The liquid-solid ratio is controlled at 12.5mL / g, the temperature is 160°C, the sulfuric acid concentration is 40g / L, 1.6Mpa, time 3h, a weak acid leaching slag containing Cu, Se, Te were 0.45%, 1.25%, 0.75%.

[0056] Two-stage concentrated acid leaching: put the leaching residue of one stage of weak acid in an acid-resistant autoclave for two-stage strong acid oxygen pressure leaching. 1.6Mpa, time 3h, secondary strong acid leaching slag contains Cu, Se, Te respectively 0.016%, 0.28%, 0.12%.

Embodiment 3

[0058] The method for leaching selenium and tellurium from waste miscellaneous anode copper slime provided by the present embodiment is specifically:

[0059] One-stage dilute acid leaching: Put the waste miscellaneous copper anode slime in an acid-resistant autoclave for one-stage dilute acid oxygen pressure leaching. The liquid-solid ratio is controlled at 10mL / g, the temperature is 135°C, the sulfuric acid concentration is 60g / L, It is 1.25Mpa, and the time is 4h. The first dilute acid leaching slag contains 0.59%, 1.35%, and 1.01% of Cu, Se, and Te, respectively.

[0060] Two-stage concentrated acid leaching: put the one-stage dilute acid leaching residue in an acid-resistant autoclave for two-stage concentrated acid oxygen pressure leaching, control the liquid-solid ratio to 15mL / g, the temperature is 135°C, the sulfuric acid concentration is 120g / L, The partial pressure is 1.25Mpa, and the time is 4h. The secondary concentrated acid leaching slag contains 0.05%, 0.34%,...

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Abstract

The invention relates to the technical field of copper anode slime treatment, and discloses a method for leaching selenium and tellurium from waste anode copper slime and a method for extracting selenium and tellurium. The method of leaching selenium and tellurium is one-stage dilute acid leaching: put the waste miscellaneous copper anode slime in the first acid solution with a sulfuric acid concentration of 40-60g / L, and use the oxygen pressure acid leaching method to make the waste miscellaneous copper anode slime and the first acid The solution is fully reacted to obtain dilute acid leaching solution and dilute acid leaching residue; two-stage concentrated acid leaching: place the dilute acid leaching residue in the second acid solution with a sulfuric acid concentration of 80-120g / L, and use the oxygen pressure acid leaching method to make the dilute acid The leaching residue fully reacts with the second acid solution. This method can basically realize the complete leaching of selenium and tellurium. The method for extracting selenium and tellurium from waste anode copper slime includes the above-mentioned method for leaching selenium and tellurium from waste anode copper slime. The method has a high extraction rate of selenium and tellurium.

Description

technical field [0001] The invention relates to the technical field of copper anode slime treatment, in particular to a method for leaching selenium and tellurium from waste anode copper slime and a method for extracting selenium and tellurium. Background technique [0002] Scattered metals selenium and tellurium are famous for their special properties and rare resources. They are important raw materials for modern industry and national defense construction. They are widely used in high-tech fields such as new generation electronic information, aerospace, energy, medicine and health, industry, agriculture and military industry. It is an indispensable "strategic material". [0003] At present, copper anode slime is one of the main raw materials for extracting scattered metal selenium and tellurium. However, with the continuous development of the copper smelting industry, copper metallurgical raw materials have developed from a single primary copper ore to primary copper ore ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/02
CPCC01B19/02
Inventor 饶帅刘志强王东兴刘溢曹洪杨高远段丽娟
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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