The method that reclaims magnesium and prepares magnesium hydroxide from cobalt-nickel industry cobalt-containing magnesium solution

A magnesium hydroxide and magnesium solution technology, applied in the preparation of magnesium hydroxide and cobalt compounds, chemical instruments and methods, etc., to achieve the effects of smooth filtration, reduced emissions, and reduced impact

Active Publication Date: 2017-11-10
JINGMEN GEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no method that can effectively separate cobalt and magnesium by using the cobalt-containing magnesium solution in the cobalt-nickel industry, so as to recover magnesium and prepare magnesium hydroxide

Method used

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  • The method that reclaims magnesium and prepares magnesium hydroxide from cobalt-nickel industry cobalt-containing magnesium solution

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 As shown, the method for preparing magnesium hydroxide by reclaiming magnesium from the cobalt-nickel industry cobalt-containing magnesium solution provided by this embodiment one includes the following steps:

[0026] Process one (P1):

[0027] Get cobalt-containing magnesium solution after extracting nickel, its cobalt content 30g / L, magnesium content 25g / L, at first adjust pH value to 7.3 with the sodium hydroxide of 3mol / L, temperature is controlled at 55 ℃, stirring speed 150rpm, and maintain Keep the pH value unchanged for 10 minutes, so that the cobalt is fully precipitated, and the concentration of cobalt in the solution after cobalt precipitation is 490mg / L;

[0028] Process two (P2):

[0029] Filter with a plate and frame filter press to obtain filtrate 1 and filter cake 1, add water to filter cake 1 for slurry, add water to adjust the slurry concentration to 15wt.%, water temperature 60 ° C, stirring speed during slurry is 250rpm, stir for 5mi...

Embodiment 2

[0042] like figure 1 As shown, the method for preparing magnesium hydroxide by reclaiming magnesium from the cobalt-nickel industry cobalt-containing magnesium solution provided by this embodiment two includes the following steps:

[0043] Process one (P1):

[0044] Get cobalt-containing magnesium solution after extracting nickel, its cobalt content 56g / L, magnesium content 30g / L, at first adjust pH value to 7.8 with the sodium hydroxide of 6mol / L, temperature is controlled at 40 ℃, stirring speed 250rpm, and maintain Keep the pH value unchanged for 20 minutes, so that the cobalt is fully precipitated, and the concentration of cobalt in the solution after cobalt precipitation is 327mg / L;

[0045] Process two (P2):

[0046] Filter with a plate and frame filter press to obtain filtrate 1 and filter cake 1, add water to slurry the filter cake 1, add water to adjust the slurry concentration to 10wt.%, water temperature 60 ° C, stirring speed during slurrying is 250rpm, stir for ...

Embodiment 3

[0059] like figure 1 As shown, the method for preparing magnesium hydroxide by reclaiming magnesium from the cobalt-nickel industry cobalt-containing magnesium solution provided by the present embodiment three includes the following steps:

[0060] Process one (P1):

[0061] Get cobalt-containing magnesium solution after extracting nickel, its cobalt content 90g / L, magnesium content 30g / L, at first adjust pH value to 8.2 with the sodium hydroxide of 6mol / L, temperature is controlled at 50 ℃, stirring speed 250rpm, and maintain Keep the pH value unchanged for 30 minutes, so that the cobalt is fully precipitated, and the concentration of cobalt in the solution after cobalt precipitation is 251mg / L;

[0062] Process two (P2):

[0063] Filter with a plate and frame filter press to obtain filtrate 1 and filter cake 1, add water to slurry the filter cake 1, add water to adjust the slurry concentration to 10wt.%, water temperature 50 ° C, stirring speed during slurrying is 200rpm, ...

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Abstract

The invention provides a method for recovering magnesium from a cobalt and magnesium contained solution in cobalt-nickel industry for preparation of magnesium hydroxide. The method comprises following working procedures: working procedure one: the cobalt and magnesium contained solution is taken, the pH value is regulated through addition of 3-6 mol / L of sodium hydroxide, a mixed solution is subjected to temperature control and stirred, and cobalt is enabled to be precipitated sufficiently; working procedure two: the mixed solution is filtered, first filtrate and a first filter cake are obtained, the first filter cake is pulpified through addition of water, filtering is performed again, and second filtrate is obtained; working procedure three: the second filtrate and the first filtrate are mixed, third filtrate is obtained, a sodium sulfide solution is added, a mixed solution is subjected to temperature control and stirred, then polyaluminum chloride is added, filtering is performed again, and fourth filtrate is obtained; working procedure four: the fourth filtrate is added to an alkaline solution, the pH value is regulated, and temperature control and stirring are performed; working procedure five: aging and filtering are performed sequentially, and a third filtrate cake is obtained; working procedure six: the third filtrate cake is pulpified, washed and filtered, and a fourth filter cake is obtained; working procedure seven: the fourth filter cake is pulpified, washed, filtered, dried and smashed, and a finished product is obtained. With the adoption of the method, magnesium can be recovered in a cobalt-nickel production process simply and efficiently for preparation of magnesium hydroxide.

Description

technical field [0001] The invention belongs to the technical field of resource recycling and hydrometallurgy, and in particular relates to a method for separating cobalt from an extracted cobalt-containing magnesium solution and recovering magnesium to prepare magnesium hydroxide. technical background [0002] As an industrial monosodium glutamate, cobalt-nickel has been widely used in the manufacture of high-energy batteries, functional ceramics, and artificial diamonds. Usually the preparation of cobalt-nickel materials uses laterite ore with high magnesium content as the raw material. During the preparation process, the liquid after acid immersion will contain a large amount of magnesium, which will not only cause a large amount of inclusions in the subsequent cobalt-nickel extraction process. Magnesium, which brings inconvenience to the extraction, and the discharge of high-magnesium-containing wastewater into the water body will also cause the water body to be too sali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/22C01G51/00
CPCC01F5/22C01G51/003C01P2004/61C01P2006/80
Inventor 许开华盛广宏刘坤
Owner JINGMEN GEM NEW MATERIAL
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