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Improved method for extracting cobalt from tailings

An extraction method and tailings technology, which is applied in the field of improved cobalt extraction from tailings, can solve the problems of heavy filtration burden, unrecoverable nickel and cobalt, high sediment viscosity and difficult washing, etc., achieving low cost, reasonable and novel method design, The effect of high-quality finished products

Inactive Publication Date: 2016-05-11
HEBEI UNIV OF ENG
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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 present invention is an improved method for extracting cobalt from tailings, comprising the following steps:

[0026] (1) After crushing the tailings to a maximum particle diameter of 1-2mm, add the crushed tailings powder to the inorganic acid and mix, heat the mixture to 350 degrees Celsius, and roast the mixture at a temperature of 350-400 degrees Celsius for 10-25 minute;

[0027] (2) adding the roasted mixture to deionized water for leaching reaction, adding alkali to remove excess inorganic acid impurities after the leaching reaction is terminated;

[0028] (3) The solid-liquid separation of the mixture obtained in step (2), taking out all the separated liquid as the mixed liquid I for subsequent use;

[0029] (4) Uniformly pulverize the solid tailings powder obtained by the solid-liquid separation in step (3) to 550 mesh...

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Abstract

The invention discloses an improved method for extracting cobalt from tailings. The method is characterized by including steps: (1) grinding the tailings into powder with a maximum partial diameter being 1-2mm, adding the powder of the tailings into mineral acid, mixing, heating the mixture to 350 DEG C, and calcining for 10-25min at the temperature of 350-400 DEG C; (2) adding the calcined mixture into deionized water to realize leaching reaction, and adding alkali to remove excessive inorganic acid impurities after the leaching reaction is finished; (3) subjecting the mixture obtained at the step (2) to solid-liquid separation, and taking out the completely separated liquid which is mixed liquid I for standby application. The improved method for extracting the cobalt from the tailings has the advantages that defects in the prior art are overcome, and reasonability and novelty in design are achieved.

Description

technical field [0001] The invention relates to an improved method for extracting cobalt from tailings, which belongs 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. 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 p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B1/02C22B3/04
CPCY02P10/20
Inventor 孟志强张海岛程文净聂想陆青锋
Owner HEBEI UNIV OF ENG
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