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Method for producing high-grade copper sulfate from copper-containing waste rocks

A copper sulfate and grade technology, applied in the direction of improving process efficiency, can solve environmental security threats, polluted soil and water resources and other problems, and achieve the effect of high purity, high leaching rate and advanced technology

Pending Publication Date: 2021-12-28
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These large amounts of stockpiled ores release a large amount of heavy metal ions under natural oxidation, which seriously pollutes local soil and water resources and poses a huge threat to local environmental safety.

Method used

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  • Method for producing high-grade copper sulfate from copper-containing waste rocks
  • Method for producing high-grade copper sulfate from copper-containing waste rocks
  • Method for producing high-grade copper sulfate from copper-containing waste rocks

Examples

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Effect test

Embodiment 1

[0029] A method for producing high-grade copper sulfate from copper-containing waste rock of the present invention, its specific steps are as follows:

[0030] ⑵ The grinding fineness of copper waste rock is 80% of -120 mesh.

[0031] ⑵Biological leaching, the copper-containing waste rock (grade 0.21%) is leached through the sulfuric acid solution with a pH of 1.5 and the high-efficiency leaching bacteria BY3# bacterial population combination leaching solution, the leaching temperature is 45°C, the leaching time is 40 days, and the leaching filtrate and the leaching filtrate are obtained by vacuum filtration. filter residue;

[0032] (3) extract copper, add copper extractant LIX841 to extract copper in the leaching filtrate of step (2), obtain the copper-containing loaded organic phase and raffinate after extraction;

[0033] (4) stripping, adding sulfuric acid solution (concentration 150g / l) to the copper-loaded organic phase of step (3) and carrying out stripping, obtain st...

Embodiment 2

[0040] A method for producing high-grade copper sulfate from copper-containing waste rock of the present invention, its specific steps are as follows:

[0041] ⑵ The grinding fineness of copper waste rock is 80% of -120 mesh.

[0042] ⑵biological leaching, leaching copper-containing waste rock (grade 0.23%) through sulfuric acid solution with pH 1.5 and high-efficiency leaching bacteria BY3# bacterial population combination leaching liquid, leaching temperature 50 ℃, leaching time 35 days, vacuum filtration to obtain leaching filtrate and filter residue;

[0043] (3) extract copper, add copper extractant LIX984 to extract copper in the leaching filtrate of step (2), obtain the copper-containing loaded organic phase and raffinate after extraction;

[0044] (4) stripping, adding sulfuric acid solution (concentration 150g / l) to the copper-loaded organic phase of step (3) to carry out stripping, obtain stripping solution (specific gravity 1.16 g / m 3 ) and stripping the organic p...

Embodiment 3

[0051] A method for producing high-grade copper sulfate from copper-containing waste rock of the present invention, its specific steps are as follows:

[0052] ⑵ The grinding fineness of copper waste rock is 80% of -120 mesh.

[0053] ⑵Biological leaching, leaching copper-containing waste rock (grade 0.195%) through sulfuric acid solution with a pH of 1.5 and high-efficiency leaching bacteria BY3# bacterial population combination leaching solution, leaching temperature 55 ° C, leaching time 45 days, vacuum filtration to obtain leaching filtrate and filter residue;

[0054] (3) extract copper, add copper extractant LIX841 to extract copper in the leaching filtrate of step (2), obtain the copper-containing loaded organic phase and raffinate after extraction;

[0055](4) stripping, adding sulfuric acid solution (concentration 150g / l) to the copper-loaded organic phase of step (3) and carrying out stripping, obtaining stripping solution (specific gravity 1.12 g / m 3 ) and strippi...

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Abstract

The invention discloses a method for producing high-grade copper sulfate from copper-containing waste rocks. The method comprises the following steps: taking copper-containing waste rocks as raw materials, carrying out biological leaching by using a bred efficient ore leaching bacterium BY3# bacterial population combination under an acidic condition, and filtering to obtain leachate; extracting the leachate by using a copper extracting agent, and reversely extracting by using a sulfuric acid solution; and evaporating, concentrating, centrifugally filtering and drying a reverse extraction solution to obtain high-grade copper sulfate. The method is simple in process and advanced in technology; the purity of the recycled and prepared copper sulfate is high; and the copper waste rock resources can be reasonably developed and utilized.

Description

technical field [0001] The invention relates to the technical field of recovery and utilization of ore resources, in particular to a method for producing high-grade copper sulfate from copper-containing waste rock. Background technique [0002] There are more than 200 million tons of copper waste rock in a mine, the copper grade is about 0.2%, and the copper metal content is about 400,000 tons. If this part of copper resources is recovered, it is equivalent to the copper reserves of a new small copper deposit . These large quantities of ore stockpile release a large amount of heavy metal ions under natural oxidation, which seriously pollutes local soil and water resources and poses a huge threat to local environmental safety. Therefore, making good use of these once-abandoned resources not only improves the level of comprehensive utilization of resources and increases resource reserves by "turning waste into treasure", but also improves the quality of mine environmental pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B3/30C22B15/00
CPCC22B3/18C22B15/0071C22B15/0065Y02P10/20
Inventor 王永智张析寇明遥王瑞芳王进龙齐艳妮王军牟业龙
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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