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Method for leaching Cuba nickel-cobalt raw material

A leaching and nickel-cobalt technology, which is applied in the field of leaching Cuban nickel-cobalt raw materials, can solve the problems of environmental pollution, low leaching rate and large amount, and achieve the effect of reducing production cost and pollution

Inactive Publication Date: 2014-04-16
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the process is mostly processed by rotary kiln roasting. During this process, a large amount of sulfur dioxide gas and ammonia gas will be generated, causing environmental pollution, and the leaching rate is relatively low.

Method used

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  • Method for leaching Cuba nickel-cobalt raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Slurry 200g of Cuban nickel-cobalt raw material with 1 liter of aqueous solution added with 10ml of sulfuric acid and pour it into a 2L titanium-lined stainless steel autoclave, carry out oxidation leaching at a temperature of 130°C and a pressure of 0.5Mpa, react for 2 hours and then filter to obtain an oxidation leaching solution. Nickel, cobalt and copper are efficiently leached.

[0016] Operation results: the slag rate is 1.2%, and the acidity of the solution after the reaction is 0.31mol / L.

[0017] Reaction result: The leaching rate of copper is 99.21%, the leaching rate of cobalt is 99.9%, and the leaching rate of nickel is 99.9%.

Embodiment 2

[0019] Slurry 200g of Cuban nickel-cobalt raw material with 1.2 liters of aqueous solution adding 15ml of sulfuric acid and add it to a 2L titanium-lined stainless steel kettle, carry out oxidation leaching at a temperature of 140°C and a total pressure of 0.6 Mpa, react for 4 hours and then filter to obtain an oxidation leaching solution, nickel, cobalt, Copper is leached efficiently.

[0020] Operation results: the slag rate is 1.5%, and the acidity of the solution after the reaction is 0.44mol / L.

[0021] Reaction result: the leaching rate of copper is 99.48%, the leaching rate of cobalt is 99.9%, and the leaching rate of nickel is 99.9%.

Embodiment 3

[0022] Example 3: Slurry 200g of Cuban nickel-cobalt raw material with 1.6 liters of aqueous solution adding 20ml of sulfuric acid, add 2L titanium-lined stainless steel kettle, carry out oxidation leaching at a temperature of 150°C and a total pressure of 0.8Mpa, filter and wash after a reaction time of 3 hours, and obtain oxidized In the leaching solution, nickel, cobalt and copper are efficiently leached.

[0023] Operation results: the slag rate is 1.1%, and the acidity of the solution after the reaction is 0.69mol / L.

[0024] Reaction result: the leaching rate of copper is 99.88%, the leaching rate of cobalt is 99.89%, and the leaching rate of nickel is 99.87%.

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Abstract

The invention discloses a method for leaching the Cuba nickel-cobalt raw material and relates to a hydrometallurgy method for extracting nickel, cobalt and copper through leaching the Cuba nickel-cobalt raw material. The method is characterized by comprising the following steps: pulpifying the Cuba nickel-cobalt raw material and the sulfuric acid solution, putting the pulpified Cuba nickel-cobalt raw material and the sulfuric acid solution in a kettle, performing heating, pressurizing and oxidizing leaching, filtering the lixivium, and performing extraction and separation on copper, nickel and cobalt. With adoption of the method, the leaching rates of nickel, copper and cobalt are greater than or equal to 99.1%, and the lixivium can be pressurized and oxidized by adopting P204 and P507 to perform extraction and separation on copper, nickel and cobalt to obtain copper sulfate, cobaltous sulfate and sulfuric acid, so that the pollution to the environment is effectively reduced, and the production cost is reduced.

Description

technical field [0001] A method for leaching Cuban nickel-cobalt raw materials relates to a hydrometallurgical method for extracting nickel, cobalt and copper from Cuban nickel-cobalt raw materials. Background technique [0002] The Cuban nickel-cobalt raw material is the nickel-cobalt intermediate product produced by the Maua Nickel Plant of the Cuban Nickel Industry Company. The raw material of the plant is mainly nickel-cobalt oxide ore in the Maua mining area. Compared with the advanced ammonia leaching process, the ammonia immersion solution is precipitated by a thickener, and the supernatant is precipitated with ammonium bisulfide to cobalt, and the mixture of nickel sulfide and cobalt sulfide is obtained for sale. The Cuban material is the mixture of nickel sulfide and cobalt sulfide obtained by the above process. Cuban material is the main raw material for the production of nickel sulfate, cobalt sulfate and copper sulfate. At present, most of the processes are pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B15/00C22B3/08
CPCY02P10/20
Inventor 王丽娜赵书运王书友徐文芳苏俊敏张鹏苏玉娟
Owner JINCHUAN GROUP LIMITED
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