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Separation method of copper-cobalt oxidized ore

A separation method and technology of cobalt oxide ore, which is applied in the field of separation of copper-cobalt oxide ore, can solve the problems of high cobalt recovery cost, low leaching rate, and difficult leaching, and achieve the effects of easy industrial application, increasing leaching rate, and inhibiting leaching

Active Publication Date: 2021-04-06
CHINA ENFI ENGINEERING CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] African copper-cobalt oxide ore is rich in resources. At present, hydrometallurgical treatment is usually used to leach and separate copper and cobalt from African copper-cobalt oxide ore. However, the copper-cobalt oxide ore contains sulfur, and copper sulfide and monovalent copper are not easy to leach , the leaching rate is low, and the high-priced cobalt in copper-cobalt ore is not easily leached, and the copper-cobalt leached in the traditional process is usually mixed together, and the recovery cost of cobalt is relatively high

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  • Separation method of copper-cobalt oxidized ore

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Comparison scheme
Effect test

Embodiment 1

[0036] Feed oxygen into the 200 mesh copper-cobalt oxide ore, and the oxygen feed rate is 0.6Nm 3 / m 3 矿浆Min, add copper cobalt oxide ore 3% sodium metabisulfite, add sulfuric acid, control pH to 3.5, leaching temperature is 80°C, reaction time is 4h, liquid-solid ratio is controlled at 8:1, carry out catalytic oxidation leaching to obtain ore pulp After leaching, the ore pulp is filtered, the filter cake is washed, and the washed liquid is incorporated into the leachate to obtain copper sulfate leachate and filter residue. After the leaching, the copper leaching rate is 95%, and the concentration of cobalt in the copper sulfate leachate is 8ppm. After extracting the obtained copper sulfate leaching solution, cathode copper is produced by electrowinning.

[0037] The filter residue is reduced and leached for cobalt, using hydrogen peroxide as a reducing agent, adding sulfuric acid, the pH is controlled at 3.8, the temperature is controlled at 80 ° C, the reaction time is 4 h...

Embodiment 2

[0042] Feed a mixed gas of sulfur dioxide and oxygen into the 200 mesh copper-cobalt oxide ore, wherein the volume concentration of sulfur dioxide is 1% of the mixed gas, and the amount of the mixed gas is 1Nm 3 / m 3 矿浆 min, adding sulfuric acid, pH control is 3.8, leaching temperature is 75°C, reaction time is 3h, liquid-solid ratio is controlled at 8:1, catalytic oxidation leaching is carried out to obtain ore pulp, after leaching the ore pulp is filtered, filter cake is washed, washed After the liquid is merged into the leaching solution, copper sulfate leaching solution and filter residue are obtained. After leaching, the copper leaching rate is 95.8%, and the concentration of cobalt in the copper sulfate leaching solution is 6 ppm. After extracting the obtained copper sulfate leaching solution, cathode copper is produced by electrowinning.

[0043] The filter residue is reduced and leached for cobalt, sulfur dioxide is used as the reducing agent, sulfuric acid is added,...

Embodiment 3

[0048] Into the 200-mesh copper-cobalt oxide ore, the volume concentration of 95% enriched oxygen is passed, and the oxygen-enriched amount is 0.8Nm 3 / m 3 矿浆 Min, add sodium sulfite with 8% copper-cobalt oxide ore mass, add sulfuric acid, control pH to 4, leaching temperature is 70°C, reaction time is 4h, liquid-solid ratio is controlled at 8:1, carry out catalytic oxidation leaching to obtain ore pulp, After leaching, the pulp is filtered, the filter cake is washed, and the washed liquid is merged into the leaching solution to obtain copper sulfate leaching solution and filter residue. After leaching, the copper leaching rate is 95.5%, and the cobalt concentration in the copper sulfate leaching solution is 9ppm. After extracting the obtained copper sulfate leaching solution, cathode copper is produced by electrowinning.

[0049] The filter residue is reduced and leached for cobalt, using sodium sulfite as a reducing agent, adding sulfuric acid, controlling the pH at 3.2, c...

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Abstract

The invention discloses a separation method of copper-cobalt oxidized ore. The method comprises the following steps of a. immersing copper-cobalt oxidized ore powder into sulfuric acid, introducing oxygen-containing gas, adding a catalyst, carrying out catalytic oxidation leaching with the pH value of 3.5-4.0 in the leaching process to obtain ore pulp, and filtering to obtain a copper sulfate leachate and filter residues; and b, adding sulfuric acid and a reducing agent into the filter residues obtained in the step a, and carrying out reduction cobalt leaching to obtain cobalt-containing leachate. According to the separation method of the copper-cobalt oxidized ore, copper existing in various forms in the copper-cobalt oxidized ore can be effectively leached, leaching of cobalt can be effectively restrained while copper is leached, and effective separation of copper and cobalt is achieved.

Description

technical field [0001] The invention belongs to the technical field of copper-cobalt ore hydrometallurgy, and in particular relates to a method for separating copper-cobalt oxide ore. Background technique [0002] African copper-cobalt oxide ore is rich in resources. At present, hydrometallurgical treatment is usually used to leach and separate copper and cobalt from African copper-cobalt oxide ore. However, the copper-cobalt oxide ore contains sulfur, and copper sulfide and monovalent copper are not easy to leach , the leaching rate is low, and the high-priced cobalt in copper-cobalt ore is not easily leached, and the copper-cobalt leached in the traditional process is usually mixed together, and the recovery cost of cobalt is relatively high. [0003] Therefore, there is an urgent need to develop a separation method for copper-cobalt oxide ore to effectively separate sulfur-containing copper-cobalt oxide ore. Contents of the invention [0004] The present invention is b...

Claims

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Application Information

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IPC IPC(8): C22B15/00C22B23/00C22B3/08C22B3/44
CPCC22B15/0071C22B23/043C22B23/0461Y02P10/20
Inventor 孙宁磊刘诚丁剑戴江洪林洁媛李勇秦丽娟
Owner CHINA ENFI ENGINEERING CORPORATION