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Method for extracting and separating nickel, cobalt and magnesium from nickel, cobalt and magnesium mixed solution

A mixed solution, nickel-cobalt-magnesium technology, applied in the field of extraction and separation of nickel, cobalt and magnesium from nickel-cobalt-magnesium mixed solution, can solve the problem that the impurity content is difficult to meet the raw material requirements of battery materials, the separation of nickel and magnesium is incomplete, and the separation of cobalt and magnesium Incomplete and other problems, to achieve the effect of low cost, good quality and high yield

Active Publication Date: 2020-07-14
SINOSTEEL ANHUI TIANYUAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned disclosed technologies all pay attention to the control of the extraction process, and ignore the importance of the washing process. They simply adopt sulfuric acid solution as the washing liquid, resulting in low nickel and cobalt yields, incomplete separation of nickel and magnesium, and insufficient separation of cobalt and magnesium. Thoroughly, the impurity content in nickel sulfate solution and cobalt sulfate solution is difficult to meet the raw material requirements of battery materials

Method used

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  • Method for extracting and separating nickel, cobalt and magnesium from nickel, cobalt and magnesium mixed solution
  • Method for extracting and separating nickel, cobalt and magnesium from nickel, cobalt and magnesium mixed solution
  • Method for extracting and separating nickel, cobalt and magnesium from nickel, cobalt and magnesium mixed solution

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Embodiment 1

[0055] The nickel-cobalt-magnesium mixed solution to be treated used in the present embodiment, the chemical composition analysis results are shown in Table 1:

[0056] Table 1 Chemical composition of nickel-cobalt-magnesium mixed solution to be treated (g / L)

[0057] element Ni co Mg Ca Fe Cu Zn Al content 68.08 5.81 3.25 ＜0.001 ＜0.001 ＜0.001 ＜0.001 ＜0.001

[0058] It can be seen from the data in Table 1 that the content of other impurities in the nickel-cobalt-magnesium mixed solution can meet the requirements, and only need to separate the three elements of nickel, cobalt, and magnesium from each other to obtain nickel sulfate products and cobalt sulfate products for battery materials respectively. ;

[0059] (1) P507 extraction of cobalt and magnesium: take 1000mL of the above-mentioned nickel-cobalt-magnesium mixed solution, add saponified P507 extractant, the volume fraction of P507 is 25%, the saponification rate is 30%, the co...

Embodiment 2

[0075] The mixed solution of nickel-cobalt-magnesium to be treated used in the present embodiment, the chemical composition analysis results are shown in Table 5:

[0076] Table 5 Chemical composition of nickel-cobalt-magnesium mixed solution to be treated (g / L)

[0077] element Ni co Mg Ca Fe Cu Zn Al content 85.69 7.54 4.25 ＜0.001 ＜0.001 ＜0.001 ＜0.001 ＜0.001

[0078] (1) P507 extracts cobalt-magnesium: get above-mentioned nickel-cobalt-magnesium mixed solution 1000mL, add saponification P507 extraction agent in the solution, P507 volume fraction is 20%, saponification rate is 35%, control compares O / A to be 1:2, Carry out 4 stages of counter-current extraction, then stand and separate to obtain the organic phase and raffinate with high Co, Mg and high Ni loads, the raffinate is pure nickel sulfate solution, its volume is 1000mL, and the concentrations of Co and Mg are respectively 0.05g / L and 0.06g / L, the chemical composition of pu...

Embodiment 3

[0089] The mixed solution of nickel-cobalt-magnesium to be treated used in the present embodiment, the chemical composition analysis results are shown in Table 8:

[0090] Table 8 Chemical composition of mixed solution of nickel-cobalt-magnesium to be treated (g / L)

[0091] element Ni co Mg Ca Fe Cu Zn Al content 95.47 15.21 10.38 ＜0.001 ＜0.001 ＜0.001 ＜0.001 ＜0.001

[0092] (1) P507 extracts cobalt-magnesium: get above-mentioned nickel-cobalt-magnesium mixed solution 1000mL, add saponification P507 extraction agent in the solution, P507 volume fraction is 30%, saponification rate is 20%, control compares O / A to be 2:5, Carry out 5 stages of countercurrent extraction, then stand and separate to obtain the organic phase and raffinate with high Co, Mg and high Ni load, the raffinate is pure nickel sulfate solution, its volume is 1000mL, and the concentrations of Co and Mg are respectively 0.07g / L and 0.07g / L, the chemical composition of...

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Abstract

The invention relates to the technical field of batteries, and discloses a method for extracting and separating nickel, cobalt and magnesium from a nickel, cobalt and magnesium mixed solution. The method is applied to the nickel, cobalt and magnesium mixed solution with the nickel content of 50-100 g / L, the cobalt content of 5-20 g / L and the magnesium content of 3-15 g / L. The method includes the following steps of firstly, extracting cobalt and magnesium; secondly, washing nickel in the first step; thirdly, washing magnesium in the second step; fourthly, washing magnesium in the third step; and fifthly, performing reverse extraction on cobalt. By means of the method, it is ensured that the content of impurities in a nickel sulfate product and a cobaltous sulfate product meet the requirement of battery materials in the nickel washing and magnesium washing process, the loss of nickel and cobalt is reduced, the product quality is good, the nickel yield and cobalt yield are high, the technological process is simple, cost is low, and the nickel sulfate product and the cobaltous sulfate product for the battery materials can be obtained after deoiling and crystallizing steps are performedon a pure nickel sulfate solution and a pure cobaltous sulfate solution.

Description

technical field [0001] The invention relates to the field of battery technology, and relates to a method for extracting and separating nickel, cobalt and magnesium from a nickel-cobalt-magnesium mixed solution, in particular mainly laterite nickel ore hydrometallurgical intermediate product mixed nickel cobalt hydroxide (MHP) through acid After immersion, hydrolysis to remove iron and aluminum, adsorption to remove silicon, P204 extraction to remove impurities, etc., the nickel-cobalt-magnesium mixture with a nickel content of 50-100g / L, a cobalt content of 5-20g / L, and a magnesium content of 3-15g / L Solution extraction method for separating nickel, cobalt and magnesium three elements. Background technique [0002] With the rapid development of new energy vehicles, the gradual maturity of the safety of ternary materials in the power field and the increasing demand for cruising range in the consumer market, nickel-cobalt-manganese ternary materials and nickel-cobalt-aluminum ...

Claims

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Application Information

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IPC IPC(8): C22B3/38C22B23/00
CPCC22B23/0453C22B23/0476C22B3/3846Y02P10/20
Inventor 钱有军裴晓东骆艳华鲍维东李涛刘晨李晓祥费凡
Owner SINOSTEEL ANHUI TIANYUAN TECH
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