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Process method for recovering copper from low-grade copper oxide ore

A technology of copper oxide ore and process method, applied in the field of copper recovery, can solve the problems of difficulty in beneficiation and enrichment of low-grade copper oxide ore and high cost, and achieve the effects of low cost, small usage amount and overcoming the complex flotation process.

Active Publication Date: 2020-08-07
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a process for recovering copper from low-grade copper oxide ore, in order to solve the problems of difficulty in beneficiation and enrichment of low-grade copper oxide ore, high cost, etc., and to realize copper recovery in low-grade copper oxide ore. Efficient selective leaching and recovery of

Method used

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  • Process method for recovering copper from low-grade copper oxide ore
  • Process method for recovering copper from low-grade copper oxide ore
  • Process method for recovering copper from low-grade copper oxide ore

Examples

Experimental program
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Effect test

Embodiment 1

[0058] The grade of copper in the low-grade copper oxide ore used is 0.4%, containing alkaline gangues such as quartz, dolomite and calcite.

[0059] (1) Grinding and leaching agent configuration: crush, grind, and sieve the copper oxide ore until the proportion of minerals with a particle size of less than 0.074mm is 90%; configure a glycine leaching agent concentration of 50g / L, and use sodium hydroxide The solution adjusts the pH of the leaching agent solution to be 10;

[0060] (2) Leaching process: Mix the prepared glycine leaching agent with copper oxide mineral at a liquid-solid ratio of 5:1, heat to 40°C, and leaching for 1 hour under mechanical stirring at 50 rpm, the copper leaching rate reaches 50 %; use a plate and frame filter device to filter the leached pulp to obtain copper-containing leaching solution and leaching slag;

[0061] (3) Copper precipitation process: the above-mentioned copper-containing leaching solution is neutralized with 200g / L oxalic acid sol...

Embodiment 2

[0064] The grade of copper in the low-grade copper oxide ore used is 1.0%, containing alkaline gangues such as quartz, gibbsite, and calcite.

[0065] (1) Grinding and leaching agent configuration: crush, grind, and sieve the copper oxide ore until the proportion of minerals with a particle size of less than 0.074mm is 90%; configure a glycine leaching agent concentration of 100g / L, and use sodium hydroxide The solution adjusts the pH of the leaching agent solution to be 10.5;

[0066] (2) Leaching process: Mix the prepared glycine leaching agent with copper oxide mineral at a liquid-solid ratio of 10:1, heat to 60°C, and leaching for 5 hours under mechanical stirring at 100 rpm, the copper leaching rate reaches 70 %; use a plate and frame filter device to filter the leached pulp to obtain copper-containing leaching solution and leaching slag;

[0067] (3) Copper precipitation process: the above-mentioned copper-containing leaching solution is neutralized with 250g / L oxalic a...

Embodiment 3

[0070] The grade of copper in the low-grade copper oxide ore used is 1.5%, containing alkaline gangues such as quartz, dolomite and mica.

[0071] (1) Grinding and leaching agent configuration: crush, grind, and sieve the copper oxide ore until the minerals with a particle size of less than 0.074mm account for 90%; configure a glycine leaching agent concentration of 150g / L, and use ammonia solution to adjust The pH of the leaching agent solution is 11;

[0072] (2) Leaching process: Mix the configured glycine leaching agent with copper oxide mineral at a liquid-solid ratio of 15:1, heat to 70°C, and leaching for 10 hours under mechanical stirring at 150 rpm, the copper leaching rate reaches 75 %; use a plate and frame filter device to filter the leached pulp to obtain copper-containing leaching solution and leaching slag;

[0073] (3) Copper precipitation process: the above-mentioned copper-containing leaching solution is neutralized with 300g / L oxalic acid solution, and the ...

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Abstract

The invention relates to a process method for recovering copper from low-grade copper oxide ore, belongs to the technical field of copper recovery, and solves the problems of difficulty in beneficiation and enrichment, high cost and the like of the low-grade copper oxide ore. In the process method for recovering copper, the copper grade in the low-grade copper oxide ore is 0.4-2.0 %, and the low-grade copper oxide ore contains at least one alkaline gangue mineral of quartz, dolomite, gibbsite, calcite and mica. The process method for recovering copper comprises the following steps: S1, grinding the copper oxide ore and preparing a leaching agent, wherein the leaching agent is a glycine leaching agent; S2, mixing the copper oxide ore subjected to grinding with the leaching agent, selectively leaching copper in the copper oxide ore, and carrying out filtering to obtain a copper-containing glycine solution; S3, mixing the copper-containing glycine solution and oxalic acid solution for copper deposition; and 4, washing the copper oxalate precipitate, putting the washed copper oxalate precipitate into a high-temperature roasting furnace, and carrying out heating decomposition to obtaincopper powder. The efficient selective leaching and recovering of copper in the low-grade copper oxide ore can be realized.

Description

technical field [0001] The invention belongs to the technical field of copper recovery, in particular to a process for recovering copper from low-grade copper oxide ore. Background technique [0002] With the rapid development of my country's copper industry, the consumption of copper is increasing year by year. Today, it is difficult to meet the demand for copper in my country's industry only by relying on high-grade copper sulfide ore resources, while my country's copper oxide ore resources are relatively abundant, accounting for about 15% of the total reserves of copper ore resources. The development of copper oxide ore is the guarantee for my country's copper industry. important step in development. [0003] However, copper oxide ore has the characteristics of low grade and complex mineral facies, and the content of copper-containing single mineral is low, and it mostly coexists with a large amount of alkaline gangue in the form of homogeneous substitution and doping, wh...

Claims

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Application Information

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IPC IPC(8): C22B3/16C22B3/44C22B15/00
CPCC22B3/165C22B3/44C22B15/0073C22B15/0089Y02P10/20
Inventor 曹亦俊黄宇坤范桂侠彭伟军李超李国胜
Owner ZHENGZHOU UNIV
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