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Method for extracting cobalt from tailings

An extraction method and technology for tailings, which are applied in the field of cobalt extraction from tailings, can solve the problems of unrecoverable nickel and cobalt, heavy filtration burden, high sediment viscosity and difficult to wash, etc., and achieve the effect of reasonable and novel method design.

Inactive Publication Date: 2016-05-11
HEBEI UNIV OF ENG
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

By neutralizing and removing iron, the resulting precipitate has a high viscosity and is difficult to wash, and the filtration burden is huge
Despite the multi-stage washing method, there is still a large amount of nickel and cobalt mixed into the iron slag and cannot be recovered

Method used

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Embodiment Construction

[0024] The technical characteristics of the present invention will be further elaborated below in conjunction with specific embodiments.

[0025] The invention is a method for extracting cobalt from tailings, comprising the following steps:

[0026] (1) After the tailings are crushed to a maximum particle diameter of 1-2 mm, the pulverized tailings powder is added to a mixture of sulfuric acid and hydrogen peroxide for leaching, and after the leaching reaction is terminated, alkali is added to remove excess inorganic acid impurities;

[0027] (2) The mixture obtained in step (1) is separated from solid to liquid, and all the separated liquid is taken out as mixed liquid I for subsequent use;

[0028] (3) Grinding the solid tailings powder obtained from the solid-liquid separation in step (2) until the largest particle size is 0.8-1.8 mm, adding the pulverized tailings powder into a mixture of sulfuric acid and hydrogen peroxide for leaching, and adding alkali after the leachin...

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Abstract

The invention discloses a method for extracting cobalt from tailings. The method includes steps: (1) grinding the tailings into powder with a maximum partial diameter being 1-2mm, adding the ground tailings into mixed liquid of sulfuric acid and hydrogen peroxide to realize leaching, and adding alkali to remove excessive inorganic acid impurities after leaching reaction is finished; (2) subjecting a mixture obtained at the step (1) to solid-liquid separation, and taking out the completely separated liquid which is mixed liquid I for standby application; (3) grinding solid tailing powder obtained by solid-liquid separation at the step (2) into powder with a maximum partial diameter being 0.8-1.8mm, adding the ground tailings into mixed liquid of sulfuric acid and hydrogen peroxide to realize leaching, and adding alkali to remove excessive inorganic acid impurities after leaching reaction is finished; (4) subjecting a mixture obtained at the step (3) to solid-liquid separation, and taking out the completely separated liquid which is mixed liquid II for standby application. The method for extracting the cobalt from the tailings has the advantages that defects of the prior art can be overcome, and the method is reasonable and novel in design.

Description

technical field [0001] The invention relates to a method for extracting cobalt from tailings, belonging to the field of mineral processing. Background technique [0002] About 30% of the global terrestrial nickel resources occur in sulfide ores, and 70% in laterite ores (nickel oxide ores). Currently only about 40% of global nickel production comes from laterite ores. With the acceleration of the development of laterite mine projects in the world in recent years, it is estimated that more than 50% of the global nickel production will come from laterite mines by 2012. Laterite ore has the characteristics of refractory mineral separation. Compared with nickel sulfide ore, laterite ore for smelting treatment has lower ore grade, higher smelting cost, and relatively poor development economy. [0003] The process of processing nickel oxide ore is mainly divided into fire method and wet method. The fire method is mainly to produce ferronickel by reduction smelting, or to produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/44C22B23/00
CPCY02P10/20
Inventor 孟志强张海岛姚文博高康曲学峰
Owner HEBEI UNIV OF ENG
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