A method of preparing battery-grade high-purity manganese sulfate by utilizing low-grade manganese ore

A low-grade manganese ore and manganese sulfate technology, applied in the direction of manganese sulfate, etc., can solve the problems of high-purity impurity removal agent consumption, insignificant removal effect, poor effect, etc., achieve remarkable impurity removal effect, good iron removal effect, easy The effect of industrial scale production

Inactive Publication Date: 2017-04-19
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods not only need to strictly control the temperature and pH value, consume a large amount of high-purity impurity removal agents, but also introduce certain other impurities, and the removal effect is not significant
[0005] Existing these methods generally need to be raw m

Method used

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  • A method of preparing battery-grade high-purity manganese sulfate by utilizing low-grade manganese ore

Examples

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Example Embodiment

[0039] Example 1:

[0040] Select low-grade manganese ore with a manganese content of 18% as raw material for manganese ore, mix low-grade manganese ore, pyrite, and industrial sulfuric acid at a mass ratio of 1:0.26:0.30, and put the prepared materials into the leaching tank After chemical leaching and solid-liquid separation are performed, a primary manganese sulfate solution is obtained, the concentration of which is 250-280 g / L. Add manganese dioxide to the primary manganese sulfate solution, adjust the pH of the solution to 4.2, add manganese dioxide as an oxidation iron removal agent, oxidize the divalent iron to trivalent iron and then generate iron hydroxide precipitation to remove iron, The iron removal effect is good; then solid-liquid separation is performed to obtain a secondary manganese sulfate solution. Add ethyl sulfur nitrogen to the secondary manganese sulfate solution. According to the heavy metal content in the secondary manganese sulfate solution, the additi...

Example Embodiment

[0041] Example 2:

[0042] Choose low-grade manganese ore with 20% manganese content as manganese ore raw materials, mix low-grade manganese ore, pyrite, and industrial sulfuric acid at a mass ratio of 1:0.28:0.32, and put the prepared materials into the leaching tank After chemical leaching and solid-liquid separation are performed, a primary manganese sulfate solution is obtained, the concentration of which is 250-280 g / L. Add manganese dioxide to the primary manganese sulfate solution, adjust the pH of the solution to 4.3, add manganese dioxide as an oxidation iron removal agent, oxidize the divalent iron to trivalent iron and then generate iron hydroxide precipitation to remove iron, The iron removal effect is good; then solid-liquid separation is performed to obtain a secondary manganese sulfate solution. Add ethyl sulfur nitrogen to the secondary manganese sulfate solution. According to the heavy metal content in the secondary manganese sulfate solution, the addition ratio...

Example Embodiment

[0043] Example 3:

[0044] Select low-grade manganese ore with 25% manganese content as manganese ore raw materials, mix low-grade manganese ore, pyrite, and industrial sulfuric acid at a mass ratio of 1:0.3:0.35, and put the prepared materials into the leaching tank After chemical leaching and solid-liquid separation are performed, a primary manganese sulfate solution is obtained, the concentration of which is 250-280 g / L. Add manganese dioxide to the primary manganese sulfate solution, adjust the pH of the solution to 4.5, add manganese dioxide as an oxidation iron removal agent, oxidize the divalent iron to trivalent iron and then generate iron hydroxide precipitation to remove iron, The iron removal effect is good; then solid-liquid separation is performed to obtain a secondary manganese sulfate solution. Add ethyl sulfur nitrogen to the secondary manganese sulfate solution. According to the heavy metal content in the secondary manganese sulfate solution, the addition ratio ...

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Abstract

The invention relates to a method of preparing battery-grade high-purity manganese sulfate by utilizing low-grade manganese ore. The method includes adding the low-grade manganese ore, pyrite and industrial sulfuric acid into a leaching tank, performing chemical leaching, performing solid liquid separation to obtain a primary manganese sulfate solution, then adding manganese dioxide into the primary manganese sulfate solution, adjusting the pH value of the solution, then performing solid liquid separation to obtain a secondary manganese sulfate solution, adding ethyl thiocarbamate, manganese fluoride, polyacrylamide and polyaluminum chloride into the secondary manganese sulfate solution, stirring the mixture for a certain period of time, performing solid liquid separation to obtain a purified manganese sulfate solution, adding the purified manganese sulfate solution into a crystallization kettle, performing concentration and crystallization, then performing solid liquid separation to obtain a wet manganese sulfate semi-finished product, and drying the wet manganese sulfate semi-finished product to obtain the battery-grade high-purity manganese sulfate. The method is simple in process and easy to operate. Addition of a large amount of agents is not needed in a preparing process. Secondary pollution to the environment is avoided and the production cost is low.

Description

technical field [0001] The invention relates to the field of preparation of battery-grade manganese sulfate, in particular to a method for preparing battery-grade high-purity manganese sulfate by using low-grade manganese ore. Background technique [0002] Manganese sulfate is an important basic chemical raw material, widely used in fertilizers, coatings, catalysts, ceramics, mineral processing and other fields. Manganese sulfate products or solutions with ordinary industrial grade purity can meet the needs of the above fields, but cannot meet the requirements in the field of lithium-ion battery materials. Lithium manganate materials and nickel-cobalt-manganese multi-element materials have very high requirements on the purity of manganese sulfate. Lithium manganate and nickel-cobalt-manganese multi-element materials are the core direction of demand for lithium-ion power battery materials. With the gradual promotion and application of lithium-ion power batteries in new energy...

Claims

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Application Information

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IPC IPC(8): C01G45/10
CPCC01G45/10C01P2006/80
Inventor 袁明亮闫冠杰卢道焕
Owner CENT SOUTH UNIV
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