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Method for leaching cobalt out from heterogenite

A water cobalt ore leaching technology, applied in the field of cobalt leaching from water cobalt ore, can solve problems such as difficult to increase cobalt leaching rate, increase consumption of chemical materials, increase production cost, etc., and achieve the goals of preventing spillage from polluting the environment, low cost, and reducing consumption Effect

Active Publication Date: 2016-10-26
JINGMEN GEM NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The disadvantage of this hydrometallurgical process is: the amount of reducing agent used in the reduction leaching process is often 2-3 times the theoretical amount of chemical reaction, resulting in consumption and waste of reducing agent, increasing production costs, if the amount is not increased, cobalt oxide cannot be completely reduced , it is difficult to increase the leaching rate of cobalt, and the addition of excessive reducing agent, the sulfur dioxide produced cannot participate in the metal reaction in the mineral in time and effectively, resulting in the overflow of sulfur dioxide gas from the leaching tank, and the recovery and treatment of harmful gases is absorbed by sodium carbonate. The consumption of chemical materials, and it is easy to cause the environment to be polluted

Method used

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  • Method for leaching cobalt out from heterogenite

Examples

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Comparison scheme
Effect test

Embodiment 1

[0048] 1) Ball mill: After mixing water cobalt ore with a certain proportion of water (volume ratio of water cobalt ore and water: 1:3), it enters the ball mill through an automatic feeder for wet grinding, and the particle size of the ground pulp reaches -100 Requirements for pulp, 80% passing rate;

[0049] 2) Mixing: Put the pulp through the pulp pump and cobalt sulfide slag into the mixing tank according to the weight ratio of 3:1 and mix for 1 hour, so that the two kinds of raw cobalt materials are evenly mixed;

[0050] 3) Leaching: Add concentrated sulfuric acid into the stirring tank with the mixed solution through the flow guide tube at a flow rate of 100-120L / min, keep the stirring speed at 75-100r / min, the initial sulfuric acid concentration is 180 / L, add steam To increase the reaction temperature, carry out the oxidation→reduction reaction under the condition of controlling the temperature of 80~90℃ for 8~10h, so that cobalt and other metals enter the solution in a...

Embodiment 2

[0055] 1) Ball mill: After mixing water cobalt ore with a certain proportion of water (volume ratio of water cobalt ore and water: 1:3), it enters the ball mill through an automatic feeder for wet grinding, and the particle size of the ground pulp reaches -100 Requirements for pulp, 80% passing rate;

[0056] 2) Mixing: Put the pulp through the pulp pump and cobalt sulfide slag into the mixing tank according to the weight ratio of 3:1 and mix for 1 hour, so that the two kinds of raw cobalt materials are evenly mixed;

[0057] 3) Leaching: Add hydrochloric acid into the stirring tank with the mixed solution through the flow guide tube at a flow rate of 100-120L / min, keep the stirring speed at 75-110r / min, and the initial sulfuric acid concentration at 165g / L. Carry out oxidation→reduction reaction at -75°C for 8~10 hours, after cobalt and other metals enter the solution in an ionic state, take samples for detection and analysis, when the final solution pH=3~4 and the mass perce...

Embodiment 3

[0062] 1) Ball mill: After mixing water cobalt ore with a certain proportion of water (volume ratio of water cobalt ore and water: 1:3), it enters the ball mill through an automatic feeder for wet grinding, and the particle size of the ground pulp reaches -80 Requirements for pulp, 95% passing rate;

[0063] 2) Mixing: Put the slurry through the slurry pump and cobalt sulfide slag into the mixing tank according to the weight ratio of 3:2 and mix for 1 hour, so that the two kinds of raw cobalt materials are evenly mixed;

[0064] 3) Leaching: Add the concentrated sulfuric acid into the stirring tank with the mixed solution through diversion at a flow rate of 100-120L / min, keep the stirring speed at 85-120r / min, and the initial sulfuric acid concentration at 150g / L. Carry out the oxidation→reduction reaction at -90°C for 7-9 hours, so that cobalt and other metals enter the solution in an ion state, and then take samples for detection and analysis. When the acidity of the final s...

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Abstract

The invention discloses a method for leaching cobalt out from heterogenite. The method includes the ore grinding and mixing step, wherein a heterogenite material is mixed with water for wet grinding, ore pulp is obtained, then vulcanized cobalt slag and the ore pulp are mixed, and a mixed solution is obtained; the leaching-out step, wherein inorganic acid is added to the mixed solution for a reaction, liquid-solid separation is conducted after the reaction is completed, and a leaching-out solution is obtained; the copper extraction and removal step, wherein a copper extraction agent is added to the leaching-out solution for copper extraction and removal, and copper extraction and removal residual liquid is obtained; the impurity extraction and removal step, wherein an impurity removal extraction agent is added to the copper extraction and removal residual liquid for impurity extraction and removal; and the purification step, wherein the solution obtained after impurity extraction is purified, a cobalt chloride solution is obtained, and then cobalt chloride is obtained through evaporative crystallization. By the adoption of the method, the cobalt metal is leached out effectively and selectively from the heterogenite and the vulcanized cobalt slag, consumption of a reducing agent and an oxidizing agent is reduced, the situation that sulfur dioxide gas overflows and contaminates the environment can be avoided as well, and thus the problem that the vulcanized cobalt slag is difficult to treat is solved.

Description

technical field [0001] The invention relates to a hydrometallurgical process, in particular to a method for leaching cobalt from hydrocobalt ore. Background technique [0002] Cobalt is an important strategic metal element. Cobalt and its compounds are widely used in the manufacture of hard alloys, magnetic materials, ceramics and storage battery materials. With the doubling of cobalt consumption at home and abroad, the raw material of hydrocobalt ore has become one of the main raw materials for the production of cobalt series products such as cobalt salt, cobalt oxide and electrolytic cobalt. It is mainly produced in Congo, South Africa and other countries. Chemical composition includes: CuO 10.2%, Co 2 o 3 8.2%, Fe 2 o 3 6.12%, MgO 4.5%, CaO 1.26%, NiO 1.2%, MnO 2 6.8%, etc., the contained metals exist in the form of oxides. The cobalt sulfide slag comes from the solution of P204 extraction, purification and impurity removal in the process of producing cobalt, nick...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/10C22B3/30C22B3/38C22B23/00
CPCC22B3/08C22B3/10C22B23/0423C22B23/043C22B23/0453C22B3/30C22B3/3844C22B3/3846Y02P10/20
Inventor 许开华张云河
Owner JINGMEN GEM NEW MATERIAL