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Method for selective solvent extraction of heterogenite with full-wet-process

A selective and leaching water technology, which is applied in the direction of improving process efficiency and can solve the problem of high production cost

Inactive Publication Date: 2010-10-06
南通新玮镍钴科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And usually the processing method to ferrous sulfate solution is to add a large amount of soda ash to precipitate ferrous ions, which leads to higher production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for selectively leaching water cobalt ore by a full wet method of the present invention, after ball milling and pulping the water cobalt ore to achieve a particle size of less than 150 objects, it is put into a concentrated sulfuric acid solution, and a reducing agent, ferrous sulfate, is added to the solution. The reduction reaction was carried out for 6 hours at a pH value of 1.5 and a reaction temperature of 70°C; sampling and testing, when the cobalt content in the slag was less than 0.5% and the ferrous ion in the solution was less than 2.0g / L, stop adding the reducing agent, blow in air, and The residual ferrous iron is oxidized to trivalent iron; add soda ash to the solution, adjust the pH of the solution to 3.0, and react for 2.5 hours to make the ferric iron precipitate in the form of ferric hydroxide. After the reaction, use a plate and frame filter press to filter Go to waste.

Embodiment 2

[0017] A method for selectively leaching hydrocobalt ore by a full-wet method of the present invention is to put the hydrocobalt ore into a concentrated hydrochloric acid solution after ball milling and pulping the hydrocobalt ore to achieve a particle size of less than 150, and then add a reducing agent, ferrous chloride, The reduction reaction was carried out for 5 hours at the solution pH value of 1.0 and the reaction temperature of 60°C; sampling and testing, when the cobalt content in the slag was less than 0.5% and the ferrous ion in the solution was less than 2.0g / L, stop adding the reducing agent and add divalent Sodium chlorate of 0.5 times the mass of iron ions will oxidize the residual ferrous iron into ferric iron; add soda ash to the solution, adjust the pH of the solution to 2.5, and react for 2 hours to make ferric iron precipitate in the form of ferric hydroxide. After the reaction, use a plate and frame filter press to filter out the waste residue.

Embodiment 3

[0019] A method for selective leaching of hydrocobalt ore by full wet method of the present invention is to ball mill and pulp hydrocobalt ore to meet the requirement that the particle size is less than 150, and then put it into concentrated sulfuric acid or concentrated hydrochloric acid or a mixed solution of the two, Add a mixture of reducing agent ferrous chloride and sodium sulfite, and carry out the reduction reaction for 5-9 hours under the conditions of solution pH value 2.0 and reaction temperature 60-90°C; sampling test, when the cobalt content in the slag is less than 0.5% and the ferrous iron in the solution When the ions are less than 2.0g / L, stop adding the reducing agent, add 0.5 times the mass of divalent iron ions, hydrogen peroxide, and oxidize the remaining ferrous iron into ferric iron; add soda ash to the solution, adjust the pH of the solution to 4.5, After reacting for 3 hours, the trivalent iron was precipitated in the form of ferric hydroxide. After the...

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PUM

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Abstract

The invention relates to a method for selectively leaching heterogenite, which is based on the whole wet method and characterized in that the method comprises the following steps: ball-milling and pulping heterogenite minerals until the requirement that the particle size is smaller than 150 meshes is met; putting the heterogenite minerals into concentrated sulfuric acid, concentrated hydrochloricacid or a mixed solution of both the concentrated sulfuric acid and the concentrated hydrochloric acid; adding a reducing agent containing ferrous ions to carry out reduction reaction for 5 to 9 hours under the conditions that the pH value of the solution is 1.0 to 2.0 and the reaction temperature is 60 to 90 DEG C; sampling and detecting, and stopping adding the reducing agent when the content of Cobalt in the residue is lower than 0.5% and the content of the ferrous ions in the solution is lower than 2.0g / L; adding sodium chlorate or hydrogen peroxide as an oxidizing agent, or pumping air into the solution, to oxidize the residue ferrous iron into ferric iron; adding sodium carbonate to the solution to adjust the pH value of the solution to 2.5 to 4.5; reacting for 2 to 3 hours, to precipitate the ferric iron in the form of ferric hydroxide; and leaching the waste residue after the reaction. The invention has the advantages of low production cost and low environmental pollution level.

Description

technical field [0001] The invention relates to a method for leaching cobalt ore, in particular to a method for selectively leaching hydrocobalt ore with a reducing agent containing ferrous ions. Background technique [0002] Cobalt is a widely used metal, which can be used to make alloys, permanent magnets, precision alloys, and electricity storage materials. The leaching process of hydrocobalt ore is a typical hydrometallurgical process. Under normal pressure and certain acidity conditions, cobalt will be leached through the action of reducing agent. The commonly used acid is sulfuric acid, and the reducing agent is sodium sulfite, sodium sulfite or sulfur dioxide. This operation method is friendly to equipment requirements and the environment, and is adopted by most hydrocobalt ore processing manufacturers. However, hydrocobalt ore is sometimes associated with varying degrees of copper. In the water cobalt ore leaching process, a large amount of copper sulfate solution...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/10C22B23/00C22B3/06C22B3/08C22B3/46
CPCY02P10/20
Inventor 梁永顺杜志君张海春赵美平李亿刚张忠斌赵美娟
Owner 南通新玮镍钴科技发展有限公司