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Method for extracting cobalt from tailings

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

Active Publication Date: 2016-05-11
HEBEI UNIV OF ENG
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  • Abstract
  • Description
  • Claims
  • 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 features of the present invention will be further described below in conjunction with specific embodiments.

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

[0026] (1) After pulverizing the tailings to a maximum particle diameter of 1-2mm, add the pulverized tailings powder to an inorganic acid solution for leaching. After the leaching reaction is terminated, alkali is added to remove excess inorganic acid impurities;

[0027] (2) Separate the mixture obtained in step (1) into solid and liquid, and take out all the separated liquid as mixed liquid I for later use;

[0028] (3) The solid tailings powder obtained in step (2) solid-liquid separation is crushed to the largest particle size of 0.8-1.6mm, the crushed tailings powder is added to the inorganic acid solution for leaching, after the leaching reaction is terminated, alkali is added to remove excess inorganic Acid impurities

[0029] (4) Separate ...

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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 an inorganic acid solution 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 0.8-1.6mm, adding the ground tailings into the inorganic acid solution 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 in tailings and belongs to the field of mineral processing. Background technique [0002] About 30% of global terrestrial nickel resources are found in sulfide ore, and 70% are found in laterite (nickel oxide ore). At present, only about 40% of global nickel production comes from laterite mines. With the acceleration of the development of laterite mine projects in the world in recent years, it is estimated that by 2012, more than 50% of the global nickel output will come from laterite mines. Laterite ore has the characteristics of difficult beneficiation. Compared with nickel sulfide ore, laterite ore is of low grade for smelting treatment, high smelting cost, and relatively poor development economy. [0003] The processing technology of nickel oxide ore is mainly divided into fire method and wet method. The fire method is mainly for the production of ferronickel by reduction smelting, or the producti...

Claims

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Application Information

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IPC IPC(8): C22B3/06C22B3/40C22B23/00
CPCC22B3/06C22B23/005C22B23/0415C22B3/408Y02P10/20
Inventor 孟志强张海岛李卫旭赵珊珊马家亮
Owner HEBEI UNIV OF ENG
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