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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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  • Summary
  • 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 material with the higher manganese ore of grade, but along with high-grade manganese ore exhaustion, the effect that these methods of preparing manganese sulfate in the face of low-grade manganese ore are just not good enough, and shortcoming is more, also greatly increased the cost

Method used

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

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Embodiment 1

[0040]Choose low-grade manganese ore with a manganese content of 18% as the manganese ore raw material, mix low-grade manganese ore, pyrite, and industrial sulfuric acid in 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, a primary manganese sulfate solution is obtained, and the concentration of the primary manganese sulfate is 250-280 g / L. Add manganese dioxide to the primary manganese sulfate solution, and adjust the pH value of the solution to 4.2, add manganese dioxide as an iron oxide remover, oxidize ferrous iron to ferric iron, regenerate ferric hydroxide to precipitate and remove iron, The iron removal effect is good; and then the solid-liquid separation is carried out to obtain the secondary manganese sulfate solution. In the secondary manganese sulfate solution, add ethyl disulfide nitrogen, according to the heavy metal content in the secondary manganese sulfate solution, the addit...

Embodiment 2

[0042] Choose low-grade manganese ore with a manganese content of 20% as the manganese ore raw material, mix low-grade manganese ore, pyrite, and industrial sulfuric acid in 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, a primary manganese sulfate solution is obtained, and the concentration of the primary manganese sulfate is 250-280 g / L. Add manganese dioxide to the primary manganese sulfate solution, and adjust the pH value of the solution to 4.3, add manganese dioxide as an iron oxide remover, oxidize ferrous iron to ferric iron, regenerate ferric hydroxide to precipitate and remove iron, The iron removal effect is good; and then the solid-liquid separation is carried out to obtain the secondary manganese sulfate solution. Add ethylsulfide nitrogen in the secondary manganese sulfate solution, according to the heavy metal content in the secondary manganese sulfate solution, the addition...

Embodiment 3

[0044] Choose low-grade manganese ore with a manganese content of 25% as the manganese ore raw material, mix low-grade manganese ore, pyrite, and industrial sulfuric acid in 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, a primary manganese sulfate solution is obtained, and the concentration of the primary manganese sulfate is 250-280 g / L. Adding manganese dioxide to the primary manganese sulfate solution, and adjusting the pH value of the solution to 4.5, adding manganese dioxide as an iron oxide remover, oxidizing ferrous iron to ferric iron and regenerating ferric hydroxide to precipitate and remove iron, The iron removal effect is good; and then the solid-liquid separation is carried out to obtain the secondary manganese sulfate solution. In the secondary manganese sulfate solution, add ethyl disulfide nitrogen, according to the heavy metal content in the secondary manganese sulfate sol...

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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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