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A kind of cobalt extraction method in 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, high precipitation viscosity, difficult to wash, large filtration burden, etc., and achieve the effect of reasonable and novel method design.

Active Publication Date: 2017-12-01
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 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 pulverizing the tailings to a maximum particle diameter of 1-2mm, adding the pulverized tailings powder to an inorganic acid solution for leaching, and adding alkali to remove excess inorganic acid impurities after the leaching reaction is terminated;

[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) Grind the solid tailings powder obtained from the solid-liquid separation in step (2) until the largest particle size is 0.8-1.6mm, add the pulverized tailings powder into the inorganic acid solution for leaching, and add alkali to remove excess inorganic after the leaching reaction is terminated acid i...

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Abstract

The invention discloses a method for extracting cobalt from tailings. After termination, add alkali to remove excess inorganic acid impurities; (2) separate the mixture obtained in step (1) from solid to liquid, and take out all the separated liquid as mixed liquid I for later use; (3) separate the solid obtained from step (2) from solid to liquid The tailings powder is crushed to a maximum particle size of 0.8-1.6mm, and the pulverized tailings powder is added to an inorganic acid solution for leaching. After the leaching reaction is terminated, alkali is added to remove excess inorganic acid impurities; (4) the mixture obtained in step (3) Separation of solid and liquid, take out all the separated liquid as mixed liquid II for later use. The invention has the advantages that it can overcome the disadvantages of the prior art, and the method design is reasonable and novel.

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