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Method for preparing high-purity great proportion spherical manganous-manganic oxide

A technology of trimanganese tetraoxide and spherical shape, which is applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of complex preparation process, high impurity content, irregular shape, etc., and achieve simplified process steps, high purity, and tap density big effect

Active Publication Date: 2015-11-18
HUNAN MENGDA NEW ENERGY MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects of high impurity content, low density, irregular shape, complex preparation process and high cost in the existing traditional preparation method of manganese tetraoxide, the purpose of the present invention is to provide a method with high preparation purity and tap density. The method of large spherical manganese tetraoxide with uniform particle size distribution, the method is simple in process, low in cost, high in product quality, and meets the requirements of industrial production

Method used

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  • Method for preparing high-purity great proportion spherical manganous-manganic oxide
  • Method for preparing high-purity great proportion spherical manganous-manganic oxide
  • Method for preparing high-purity great proportion spherical manganous-manganic oxide

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Embodiment 1

[0039] Prepare 20L of 1mol / L manganese sulfate solution, add 10gNa 2 S removes impurities, filters, and then adds 20g of ascorbic acid to the filtrate to dissolve, and 1.1mol / L of Na 2 CO 3 The solution is 20L, and the manganese sulfate solution and the manganese carbonate solution are sprayed into the vertical calciner at a flow rate of 5L / min by metering pumps, and the solution is reacted in the low temperature area (3 , the average particle size is in the range of 10 to 20 microns, and its elemental analysis shows that the Mn content of the trimanganese tetraoxide is 71.98%, the S content is 95ppm, the Fe content is 67ppm, and other metal impurities K, Na, Ca, The contents of Mg, Zn, Cu, Pb, Ni, and Co are 7ppm, 37ppm, 15ppm, 21ppm, 6ppm, 2ppm, 12ppm, 17ppm, and 11ppm, respectively.

Embodiment 2

[0041] Prepare 20L of 1.5mol / L manganese sulfate solution, add 12gNa 2 S removes impurity, filters, then adds 20g ascorbic acid to dissolve in the filtrate, the Na of 1.75mol / L 2 CO 3The solution is 20L, and the manganese sulfate solution and the manganese carbonate solution are sprayed into the vertical calciner at a flow rate of 10L / min by a metering pump, and the solution is reacted in the low temperature zone (3 , the average particle size is in the range of 10 to 20 microns, and its elemental analysis shows that the Mn content of the trimanganese tetraoxide is 71.96%, the S content is 97ppm, the Fe content is 65ppm, and other metal impurities K, Na, Ca, The contents of Mg, Zn, Cu, Pb, Ni, and Co are 7ppm, 42ppm, 16ppm, 19ppm, 9ppm, 5ppm, 11ppm, 21ppm, and 16ppm, respectively.

Embodiment 3

[0043] Prepare 20L of 2mol / L manganese sulfate solution, add 15gNa 2 S removes impurity, filters, then adds 20g ascorbic acid to dissolve in the filtrate, the Na of 2.4mol / L 2 CO 3 The solution is 20L, and the manganese sulfate solution and the manganese carbonate solution are sprayed into the vertical calciner at a flow rate of 7L / min by a metering pump, and the solution is reacted in the low temperature zone (3 , the average particle size is in the range of 10 to 20 microns, and its elemental analysis shows that the Mn content of the trimanganese tetraoxide is 72.01%, the S content is 78ppm, the Fe content is 56ppm, and other metal impurities K, Na, Ca, The contents of Mg, Zn, Cu, Pb, Ni, and Co are 7ppm, 35ppm, 13ppm, 15ppm, 12ppm, 7ppm, 13ppm, 25ppm, and 21ppm, respectively.

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Abstract

The invention discloses a method for preparing high-purity great proportion spherical manganous-manganic oxide. The method comprises the following steps that a manganate solution and a carbonate solution and / or a bicarbonate solution are respectively sprayed into a vertical decomposing furnace from the top of the vertical decomposing furnace in a spraying manner, pass through a low temperature area at the upper part of the vertical decomposing furnace and a high temperature area at the middle-lower part of the vertical decomposing furnace to form the spherical manganous-manganic oxide; the temperature of the low temperature area at the upper part of the vertical decomposing furnace is less than or equal to 80 DEG C, and the temperature of the high temperature of the middle-lower part of the vertical decomposing furnace is greater than or equal to 800 DEG C; the purity of the produced spherical manganous-manganic oxide is greater than or equal to 99.9%; the tap density is greater than or equal to 2.2g / cm<3>, the morphology of the spherical manganous-manganic oxide is that the mean grain size is within the range of 10 to 20 mu, the spherical manganous-manganic oxide is suitable for a precursor of lithium manganese battery anode materials, the method is short in technological process, easy to control, and easy for realizing industrialization.

Description

technical field [0001] The invention relates to a preparation method of spherical trimanganese tetraoxide with high purity and large specific gravity, and belongs to the technical field of synthesis of raw materials for lithium manganese batteries. Background technique [0002] In response to a series of problems such as energy crisis, environmental pollution, and global warming, governments of various countries have invested a lot of manpower and material resources to develop and utilize renewable green energy such as solar energy, wind energy, and tidal energy. However, these green energy sources are uncertain in time and space. , therefore, the development of cheap and environmentally friendly energy storage technology is the key technology to utilize these energy sources. Lithium-ion batteries have the advantages of small size, high voltage, large capacity, long life, small self-discharge, no memory effect, and environmental protection, and are recognized by the internat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02
Inventor 朱敏余林玉刘方予
Owner HUNAN MENGDA NEW ENERGY MATERIALS CO LTD
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