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Device and method for preparing battery-grade single-crystal manganous-manganic oxide

A technology for the preparation of trimanganese tetraoxide, which is applied in the direction of manganese oxide/manganese hydroxide, battery electrodes, secondary batteries, etc., can solve the problems of increased production costs, and achieve the effect of complete decomposition of materials and uniform temperature

Pending Publication Date: 2021-06-04
胡莉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] There are two dry production technologies of manganese tetraoxide. One is the direct roasting method of manganese carbonate or manganese hydroxide. Carbonization production and preparation, manganese hydroxide is produced by neutralizing manganese sulfate with alkali, both of which need to co-produce manganese sulfate, resulting in increased production costs
The second is the two-stage manganese sulfate calcination method (application number 201811286919.6), which is a production method invented by our company's technicians two years ago. This method better solves the problem of manganese sulfate calcination and the tail gas treatment problem generated during the calcination process. , but there is no in-depth discussion and research on the specific single crystal trimanganese tetraoxide required for the precursor of new energy lithium battery materials, especially the equipment and conditions required for the preparation of single crystal trimanganese tetraoxide.

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  • Device and method for preparing battery-grade single-crystal manganous-manganic oxide

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preparation example Construction

[0032] The embodiment of the present application also provides a method for preparing battery-grade single-crystal trimanganese tetraoxide, including: putting the manganese sulfate raw material or the manganese sulfate raw material containing impurities into the battery-grade single-crystal trimanganese tetraoxide preparation device. Calcining at 1300°C for 8-16 hours, preferably at 1050-1300°C.

[0033] The manganese sulfate raw material is manganese sulfate monohydrate, and the specific indicators are shown in the following table:

[0034] Numbering chemical composition index 1 Main content Manganese (Mn)≥(%)(Wt) 31.50 2 Magnesium (Mg)≤(%)(Wt) 1.00 3 Nickel (Ni)≤(PPM) 1500 4 Cobalt (Co)≤(PPM) 500 5 Aluminum (Al)≤(PPM) 500

[0035] Single crystal manganese tetraoxide chemical element control indicators:

[0036] Numbering chemical composition index 1 Main content Manganese (Mn)≥(%)(Wt) 71.50 2 Su...

Embodiment 1

[0049] Get 2000kg of manganese sulfate raw material, after testing the impurity content in the raw material meets the index requirements, directly feed the raw material to the preparation device of the application, use natural gas to burn, control the combustion atmosphere, and control the destruction of the wrapping mechanism near the kiln tail. The temperature is 1130°C, and the temperature near the kiln head destroying wrapping mechanism is 1200°C, calcined for 15 hours; the tail gas produced by calcining, that is, sulfur dioxide gas, is absorbed by the manganese ore slurry of the cooperative unit, and is discharged after passing the treatment according to environmental protection requirements; the calcined materials are used The high-temperature screw is conveyed to the rotary cooler. The material is cooled in the rotary kiln with normal-temperature industrial tap water externally. The cooling rate is 20°C / min to cool the material to normal temperature, and then the material...

Embodiment 2

[0058] Get 1000kg manganese sulfate raw material, only the magnesium element does not meet the requirement through testing the impurity content in the raw material, that is, the magnesium (Mg) content is 0.1%, and the index value ≥ 0.45%, need to supplement battery grade magnesium carbonate 12.25kg or magnesium hydroxide 8.46kg; Calculated value After weighing it, adopt a high-speed mixer to mix evenly with 1000kg of manganese sulfate raw material, use a feeder to transport the mixed material to the preparation device of the present application, use natural gas to burn, control the combustion atmosphere, and control The temperature near the kiln tail breaking and wrapping mechanism is 1150°C, the temperature near the kiln head breaking and wrapping mechanism is 1250°C, and the calcination is 15 hours; the tail gas produced by calcination, namely sulfur dioxide gas, is absorbed by the manganese ore pulp of the cooperative unit, and after passing the treatment according to the env...

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Abstract

The invention discloses a device for preparing battery-grade single-crystal manganous-manganic oxide. The preparation device comprises a rotary kiln, at least one destroying and wrapping mechanism is arranged in the rotary kiln, each destroying and wrapping mechanism comprises a plurality of blocking teeth and grinding rollers, the blocking teeth are annularly arranged on the inner wall of the rotary kiln at intervals, and the grinding rollers are placed between the kiln tail and the multiple blocking teeth. The invention also provides a preparation method of the battery-grade single crystal manganous-manganic oxide. According to the preparation method, the battery-grade single-crystal manganous-manganic oxide can be prepared, and the requirement of a lithium manganate battery positive electrode material precursor can be well met.

Description

technical field [0001] The invention relates to the related technical field of new energy battery electrode materials. More specifically, the present invention relates to a preparation method of single crystal trimanganese tetraoxide. Background technique [0002] There are two dry production technologies of manganese tetraoxide. One is the direct roasting method of manganese carbonate or manganese hydroxide. Carbonization production and preparation, manganese hydroxide is produced and prepared by neutralizing manganese sulfate with alkali, both of which need to co-produce manganese sulfate, resulting in increased production costs. The second is the two-stage manganese sulfate calcination method (application number 201811286919.6), which is a production method invented by our company's technicians two years ago. This method better solves the problem of manganese sulfate calcination and the tail gas treatment problem generated during the calcination process. , but there is ...

Claims

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Application Information

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IPC IPC(8): C01G45/02H01M4/505H01M10/0525
CPCC01G45/02H01M4/505H01M10/0525C01P2004/03C01P2006/40C01P2006/80C01P2004/61C01P2006/11Y02E60/10
Inventor 胡义华
Owner 胡莉