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A method for preparing high-purity copper solution and high-purity cobalt solution by high-pressure leaching of cobalt-iron alloy

A cobalt-iron alloy and high-pressure leaching technology, applied in the field of metallurgy, can solve problems such as the difficulty of utilizing cobalt-iron alloy, and achieve the effects of increasing processes and costs, avoiding processes and costs, and increasing the concentration of cobalt ions

Active Publication Date: 2020-04-07
南通金通储能动力新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing high-purity copper solution and high-purity cobalt solution by high-pressure leaching of cobalt-iron alloy to solve the problem that cobalt-iron alloy is not easy to use

Method used

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  • A method for preparing high-purity copper solution and high-purity cobalt solution by high-pressure leaching of cobalt-iron alloy
  • A method for preparing high-purity copper solution and high-purity cobalt solution by high-pressure leaching of cobalt-iron alloy
  • A method for preparing high-purity copper solution and high-purity cobalt solution by high-pressure leaching of cobalt-iron alloy

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Effect test

Embodiment 1

[0028] Step 1. One-stage leaching: Slurry the cobalt-iron alloy with water, add sulfuric acid with a concentration of 98% to carry out atmospheric acid pre-soaking, the amount of inorganic acid is 1.0 times the theoretical amount, the volume-to-mass ratio of liquid to solid is 5:1, and the pre-soaking temperature 40℃, the pre-soaking time is 5h, the slurry after pre-soaking is passed through oxygen, and the oxidative acid leaching is carried out under the condition of the oxygen pressure of 0.8MP. Afterwards, solid-liquid separation is carried out to obtain a section of leachate;

[0029] Step 2, second-stage iron removal: add an appropriate amount of lye to the first-stage leaching solution to adjust the pH value of the solution to 1.0, introduce oxygen, and remove iron under the condition of oxygen pressure of 0.8MP. The iron removal temperature is 120°C. The iron time is 8h, and the solid-liquid separation is carried out after the reaction is completed, and the iron-removed...

Embodiment 2

[0038] Step 1, one-stage leaching: Slurry the cobalt-iron alloy with water, add sulfuric acid with a concentration of 90% to carry out atmospheric acid pre-soaking, the amount of inorganic acid is 1.2 times the theoretical amount, the volume-to-mass ratio of liquid to solid is 6:1, and the pre-soaking temperature at 90°C, the pre-soaking time is 1h, the slurry after pre-soaking is passed through oxygen, and the oxidative acid leaching is carried out under the condition of oxygen pressure of 1.3MP. The temperature of oxidative acid leaching is 120°C, and the leaching time is 8h. Carry out solid-liquid separation to obtain a section of leachate;

[0039] Step 2, second-stage iron removal: add an appropriate amount of lye to the first-stage leaching solution to adjust the pH value of the solution to 1.8, introduce oxygen, and remove iron under the condition of oxygen pressure of 1.3MP. The iron removal temperature is 240°C. The iron time is 1.5h. After the reaction is completed, ...

Embodiment 3

[0048] Step 1, one-stage leaching: Slurry the cobalt-iron alloy with water, add sulfuric acid with a concentration of 90% to carry out atmospheric acid pre-soaking, the amount of inorganic acid is 1.1 times the theoretical amount, the volume-to-mass ratio of liquid to solid is 6:1, and the pre-soaking temperature 70°C, the pre-soaking time is 3h, the pre-soaked slurry is passed through oxygen, and the oxidative acid leaching is carried out under the condition of the oxygen pressure of 1.1MP. The temperature of the oxidative acid leaching is 170°C, and the leaching time is 4h. Carry out solid-liquid separation to obtain a section of leachate;

[0049] Step 2, second-stage iron removal: add an appropriate amount of lye to the first-stage leaching solution to adjust the pH value of the solution to 1.5, introduce oxygen, and remove iron under the condition of oxygen pressure of 1.1MP. The iron removal temperature is 180°C. The iron time is 4.5h, and the solid-liquid separation is ...

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Abstract

The invention discloses a method for preparing a high-purity copper solution and a high-purity cobalt solution by high-pressure leaching of a cobalt-iron alloy, which belongs to the field of metallurgy and solves the problem that the cobalt-iron alloy is not easy to use. The technical scheme of the invention comprises the following steps: one-stage leaching; second-stage iron removal; liquid extraction after iron removal to extract copper; preparation of copper solution; preparation of cobalt solution. The beneficial effects of the present invention are: the cobalt-iron alloy of the present invention does not undergo grinding, and is processed through the process of atmospheric pressure acid preleaching-high pressure oxidative acid leaching-high pressure iron removal, the recovery rate of cobalt reaches more than 99%, and the recovery of copper The rate reaches more than 98%; in the leaching process, the cobalt ion concentration in the solution reaches more than 28g / L by controlling the amount of sulfuric acid and the liquid-solid volume mass ratio, without adding additional cobalt solution to increase the cobalt ion concentration; the obtained copper solution and The cobalt solution is of high purity.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for preparing a high-purity copper solution and a high-purity cobalt solution by high-pressure leaching of a cobalt-iron alloy. Background technique [0002] The world's cobalt resources are very scarce, and most of them are low-grade complex associated mines. Cobalt-iron alloy is a cobalt-containing alloy material with a cobalt content of 9-18% and an iron content of 65-75%. 3 Fe 7 It exists in the form of iron, the content of the main metal is low and the content of impurity iron is super high, and the hardness of the material is high, so it is not easy to use. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing high-purity copper solution and high-purity cobalt solution by high-pressure leaching of cobalt-iron alloy to solve the problem that cobalt-iron alloy is not easy to use. [0004] The technical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/30C22B3/38C22B3/42C22B15/00C22B23/00
CPCC22B3/42C22B15/0071C22B15/0089C22B15/0093C22B23/0453C22B3/30C22B3/3844C22B3/3846Y02P10/20
Inventor 柴艮风马骞冯玉洁李伟王国超王悦常雪洁陈天翼周林华鲁相杰孙鹏敬军臣
Owner 南通金通储能动力新材料有限公司