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Method for removing calcium and magnesium from nickel, cobalt and manganese solution

A nickel-cobalt-manganese solution technology, which is applied in the field of nickel-cobalt hydrometallurgy, can solve the problems of calcium sulfate crystallization blocking the extraction tank and pipeline, the need for regular cleaning, and the difficulty of separation, etc., and achieves easy implementation, reduced impact, and simple process Effect

Inactive Publication Date: 2020-07-28
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing problems in the removal of calcium and magnesium by extraction are: using P204 to extract and remove calcium, a large amount of calcium sulfate crystals block the extraction tank and pipeline, and the calcium sulfate crystals need to be removed regularly; using P207 to separate magnesium requires a long number of extraction stages. more difficult

Method used

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  • Method for removing calcium and magnesium from nickel, cobalt and manganese solution

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Effect test

Embodiment 1

[0024] The composition of the nickel-cobalt-manganese solution after iron removal in a certain factory is as follows:

[0025] element Al Fe Ca co Cr Cu Mg mn Ni Zn Composition / (g / L) 0.06 0.004 0.56 9.09 0.025 0.24 1.56 3.54 95.7 1.73

[0026] Take 500mL of the above solution, heat it to 30°C, add 3.78g of nickel fluoride according to the calculation of the theoretical amount of calcium and magnesium, and the time for calcium and magnesium removal is 6h. Calcium 0.01g / L, magnesium 0.02g / L.

Embodiment 2

[0028] The nickel-cobalt-manganese solution in a factory contains 0.54g / L of calcium and 2.34g / L of magnesium. Take 500mL of the solution and heat it to 70°C. According to the calculation of the theoretical amount of calcium and magnesium, 5.31g of nickel fluoride is added. The time for removing calcium and magnesium is 5 hours. Calcium-magnesium slag and calcium-magnesium-removed liquid were obtained by separation, and the calcium-magnesium-removed liquid contained 0.008 g / L of calcium and 0.016 g / L of magnesium.

Embodiment 3

[0030] A nickel-cobalt-manganese solution in a factory contains 0.57g / L of calcium and 2.03g / L of magnesium. Take 500mL of the solution and heat it to 90°C. Add 4.74g of cobalt fluoride according to the calculation of the theoretical amount of calcium and magnesium. The time for removing calcium and magnesium is 3 hours. Calcium-magnesium slag and calcium-magnesium-removed liquid were obtained by separation, and the calcium-magnesium-removed liquid contained 0.012 g / L of calcium and 0.018 g / L of magnesium.

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Abstract

The invention discloses a method for removing calcium and magnesium from a nickel, cobalt and manganese solution, and belongs to the field of nickel and cobalt hydrometallurgy. The method includes thefollowing operation steps of firstly, heating a nickel, cobalt and manganese solution to a certain temperature, adding a certain amount of precipitant, and keeping for a certain period of time, wherein the precipitant is one of or a mixture of multiple of nickel fluoride, cobaltous fluoride and manganese fluoride; secondly, performing liquid-solid separating on ore pulp to obtain a solution and calcium and magnesium removal residues; and thirdly, performing a subsequent process on the solution to obtain a nickel product and a cobalt product. The problems that calcium sulfate crystallization occurs by means of a traditional method of calcium removal through P204 extraction and separation difficulty is high by means of a traditional method of magnesium removal through P507 extraction are solved, and the method is an efficient and green method for removing calcium and magnesium from the nickel and cobalt solution.

Description

technical field [0001] The invention belongs to the technical field of nickel-cobalt hydrometallurgy and relates to a method for removing calcium and magnesium from a nickel-cobalt-manganese solution. Background technique [0002] Mixed nickel-cobalt hydroxide is a nickel-cobalt intermediate product obtained from laterite nickel ore through high-pressure acid leaching-removal-neutralization and precipitation. It is an important raw material for the production of battery-grade nickel sulfate, battery-grade cobalt sulfate and other products. Mixing nickel hydroxide and cobalt to produce battery-grade nickel sulfate and battery-grade cobalt sulfate adopts hydrometallurgical process, and its procedures generally include sulfuric acid leaching, neutralization and removal of iron and aluminum, P204 extraction and impurity removal, P507 nickel-cobalt-magnesium separation and other processes, such as Jiangxi Companies such as Jiangtungsten, Jinchuan, and Huayou Cobalt all adopt this...

Claims

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Application Information

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IPC IPC(8): C22B3/44C22B23/00
CPCC22B3/44C22B23/0461
Inventor 郑朝振刘三平王海北秦树辰张学东邓超群周起帆王玉芳谢铿苏立峰李强
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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