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Process for recovering nickel ion from biochemical lixivium of laterite nickel mine by using room temperature ion liquid

A room temperature ionic liquid and bioleaching technology, applied in the direction of improving process efficiency, can solve problems such as large consumption of inorganic reagents, many equipment stages, pollution, etc., to improve the comprehensive utilization level, reduce environmental pollution, and improve economic benefits. Effect

Inactive Publication Date: 2009-06-17
有研资源环境技术研究院(北京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the bioleaching solution has the characteristics of high acidity, complex composition, low content of main metal ions, and doping with organic phase and solid particles. The recovery rate of the chemical precipitation method is low, the entrainment phenomenon is serious, and the formation of secondary solid pollutants constitutes an environmental hazard; The general solvent extraction method has many defects such as many equipment (series), large area occupation, large consumption of organic and inorganic reagents, high investment cost and production cost, and the extraction efficiency of the extraction agent itself is not high, the pollution is serious, and the production efficiency is low. , the poor competitiveness of the industry

Method used

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  • Process for recovering nickel ion from biochemical lixivium of laterite nickel mine by using room temperature ion liquid
  • Process for recovering nickel ion from biochemical lixivium of laterite nickel mine by using room temperature ion liquid
  • Process for recovering nickel ion from biochemical lixivium of laterite nickel mine by using room temperature ion liquid

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Experimental program
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Effect test

Embodiment 1

[0024] For example, a nickel-limonite with a nickel content of 1.32% has a specific ore sample composition as follows:

[0025]

[0026] The mineral adopts the bioleaching method of Aspergillus niger, the pulp concentration is 5%, the acid concentration is 0.2mol / L, the temperature is 35°C, and the rotation speed is 120 rotations / min. The shaking flask test is carried out, and the leaching cycle is 36 hours. The final nickel ion leaching rate was 95.8%, the cobalt ion leaching rate was 68.5%, and the iron ion leaching rate was 43.0%. The nickel ion content in the leach solution is 495mg / L, the cobalt ion content is 15.1mg / L, and the iron ion content is 1970mg / L.

[0027] Add 10ml of room temperature ionic liquid hexafluorophosphate 1-alkyl-3-methylimidazole to each liter of leaching solution, use a shaker to fully shake and stir for 10 minutes, and let stand to separate layers. At this time, the pH value of the solution is 4.0.

[0028] For stripping, add 10ml of 2mol / L hy...

Embodiment 2

[0030] For example, a nickel-limonite with a nickel grade of 1.62%, its specific ore sample composition is as follows:

[0031]

[0032]

[0033] The mineral adopts the Aspergillus niger biological leaching method, the pulp concentration is 5%, the acid concentration is 0.2mol / L, the temperature is 35°C, the rotation speed is 120 rpm, and the shaking flask test is carried out, and the leaching period is 48 hours. The final nickel ion leaching rate was 96.7%, the cobalt ion leaching rate was 68.1%, and the iron ion leaching rate was 46.5%. The nickel ion content in the leach solution is 615.6mg / L, the cobalt ion content is 12.5mg / L, and the iron ion content is 2405.4mg / L.

[0034] Add 15ml of room temperature ionic liquid hexafluorophosphate 1-alkyl-3-methylimidazole to each liter of leaching solution, and at the same time add 1ml of acidic extractant P204, use an oscillator to fully shake and stir for 10 minutes, and let it stand for stratification. At this time, the sol...

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Abstract

The invention discloses a process for recovering nickel ions from a bio-leaching solution of a laterite nickel ore by a room temperature ionic liquid. The process comprises the following steps: (1) mixing the room temperature ionic liquid and the bio-leaching solution of the laterite nickel ore at volume ratio of 1:50-100, fully stirring followed by standing for stratification during which an organic solvent of chelated metallic ion in the leaching solution can be partially enriched in a room temperature ionic liquid phase, and the metallic ions such as nickel, iron, cobalt and the like are transferred into the room temperature ionic liquid phase; (2) separating the room temperature ionic liquid phase, then serially adding dilute hydrochloric acid the concentration of which is 2-3mol / L and the volume of which is 1-1.5 times of the volume of the room temperature ionic liquid phase to perform a progressive re-extraction to realize the aim of recovering various metallic ions. The process has the advantages of simple operation, no emulsification, high extraction efficiency, short operation time, being easy in realizing multistage combination, high efficiency and being economic and environment-friendly. The invention establishes a new high-efficiency extraction process of the bio-leaching solution of the laterite nickel ore, fully utilizes low grade original nickel oxide ore resources, improves the comprehensive utilization level of mineral resources, reduces environmental pollution and improves economic benefit, thereby the process is applicable to exploitation and utilization of the laterite nickel ore mines in China.

Description

technical field [0001] The invention relates to a room-temperature ionic liquid, which can extract and recover metal ions such as nickel and cobalt in laterite-nickel ore biological leachate. The invention belongs to the research field of biological hydrometallurgy in hydrometallurgy technology. Background technique [0002] The total amount of nickel resources in my country is 7.9 million tons. According to the calculation of reserves, more than 60% of the resources are lateritic nickel resources that are difficult to be economically utilized. The current situation of poor nickel resources prompts us to seek a new type of industrial technology to solve the problem of resource utilization of laterite nickel ore. [0003] Using biometallurgical technology to treat laterite nickel ore, screening high-efficiency biometallurgical heterotrophic microorganisms, and performing selective bioleaching of laterite nickel ore such as nickel-limonite or silicon-magnesium-nickel ore can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/18C22B3/26C22B23/00C21B15/00
CPCY02P10/20
Inventor 武名麟黄松涛温建康姚国成
Owner 有研资源环境技术研究院(北京)有限公司
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