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Method for leaching selenium and tellurium from scrap anode copper mud 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: 2019-12-27
GUANGDONG INST OF RARE METALS
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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 scrap anode copper mud and method for extracting selenium and tellurium
  • Method for leaching selenium and tellurium from scrap anode copper mud and method for extracting selenium and tellurium

Examples

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Effect test

Embodiment 1

[0050] The method for leaching selenium and tellurium from waste copper anode sludge provided in this embodiment is specifically:

[0051] One-stage dilute acid leaching: Place the waste copper anode mud in an acid-resistant autoclave for a one-stage dilute acid oxygen pressure leaching of Se. The liquid-solid ratio is 10mL / g, the temperature is 150℃, the sulfuric acid concentration is 50g / L, and the oxygen partial pressure It is 1.5Mpa, time is 2h. The primary dilute acid leaching residue contains 0.40%, 1.14%, and 0.94% of Cu, Se, and Te respectively.

[0052] Two-stage concentrated acid leaching: Place one stage of dilute acid leaching residue in an acid-resistant autoclave for the second stage of concentrated acid and oxygen pressure leaching Te, controlling the liquid-solid ratio to 20mL / g, the temperature to 150℃, the sulfuric acid concentration to 90g / L, and oxygen The partial pressure is 1.5Mpa, and the time is 2h. The secondary concentrated acid leaching residue containe...

Embodiment 2

[0054] The method for leaching selenium and tellurium from waste copper anode sludge provided in this embodiment is specifically:

[0055] One-stage dilute acid leaching: Put the waste copper anode mud in an acid-resistant autoclave for a one-stage weak acid-oxygen pressure leaching of Se, control the liquid-solid ratio to 12.5mL / g, the temperature to 160℃, the sulfuric acid concentration to 40g / L, and the oxygen partial pressure It is 1.6Mpa, and the time is 3h. The weak acid leaching residue contains 0.45%, 1.25%, and 0.75% of Cu, Se, and Te respectively.

[0056] Two-stage concentrated acid leaching: Put one stage of weak acid leaching residue in an acid-resistant autoclave for the second stage of strong acid and oxygen pressure leaching Te, control the liquid-solid ratio to 25mL / g, temperature to 160℃, sulfuric acid concentration to 100g / L, oxygen partial pressure It is 1.6Mpa, time is 3h, and the secondary strong acid leaching residue contains 0.016%, 0.28% and 0.12% of Cu, Se...

Embodiment 3

[0058] The method for leaching selenium and tellurium from waste copper anode sludge provided in this embodiment is specifically:

[0059] One-stage dilute acid leaching: Place the waste copper anode mud in an acid-resistant autoclave for a one-stage dilute acid oxygen pressure leaching of Se. The liquid-solid ratio is controlled to 10mL / g, the temperature is 135℃, the sulfuric acid concentration is 60g / L, and the oxygen partial pressure It is 1.25Mpa, time 4h. The primary dilute acid leaching residue contains 0.59%, 1.35% and 1.01% of Cu, Se and Te respectively.

[0060] Two-stage concentrated acid leaching: Place one stage of dilute acid leaching residue in an acid-resistant autoclave for the second stage of concentrated acid and oxygen pressure leaching Te. The liquid-solid ratio is controlled to 15mL / g, the temperature is 135℃, the sulfuric acid concentration is 120g / L, oxygen The partial pressure is 1.25Mpa and the time is 4h. The secondary concentrated acid leaching residue...

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Abstract

The invention relates to the technical field of copper anode mud treatment, and discloses a method for leaching selenium and tellurium from scrap anode copper mud and a method for extracting seleniumand tellurium. The method for extracting selenium and tellurium includes a first stage of dilute acid leaching: the scrap copper anode slime is placed in a first acid solution with the sulfuric acid concentration being 40-60 g / L, and the scrap copper anode slime and the first acid solution are made to fully react through an oxygen pressure acid leaching method to obtain a dilute acid leaching solution and dilute acid leaching residues; and a second stage of concentrated acid leaching, specifically, the dilute acid leaching residues are placed in a second acid solution with the sulfuric acid concentration being 80-120 g / L, and the dilute acid leaching residues and the second acid solution are made to fully react through an oxygen pressure acid leaching method. The method can basically realize complete leaching of selenium and tellurium. The method for extracting the selenium and the tellurium from the scrap anode copper sludge comprises the method for leaching the selenium and the tellurium from the scrap anode copper sludge. The method is high in selenium and tellurium extraction rate.

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 miscellaneous anode copper slime and a method for extracting selenium and tellurium. Background technique [0002] The rare metals selenium and tellurium are known for their unique properties and rare resources. They are important raw materials for modern industry and national defense construction. They are widely used in new-generation electronic information, aerospace, energy, medicine and health, industry, agriculture, and military industries. It is an indispensable "strategic material". [0003] At present, copper anode mud is one of the main raw materials for extracting 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 two major categories: primary copper ore and secondary ...

Claims

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Application Information

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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 GUANGDONG INST OF RARE METALS
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