Preparation method and device of transition metal lithium oxide compound

A technology for metal compounds and transition metals, applied in the field of preparation of transition metal lithium oxide compounds, can solve the problems of low production efficiency, many production control points, and complex processing procedures.

Active Publication Date: 2020-01-17
SHANDONG ZSTONE NEW MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the known method of producing transition metal lithium oxycompounds is to use the burning pot method, put the mixture of the precursor and the lithium compound into the burning pot, then calcined at a high temperature in a roller hearth heating furnace, and then pulverize, wash, and filter dry , surface drying, coating, secondar

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  • Preparation method and device of transition metal lithium oxide compound
  • Preparation method and device of transition metal lithium oxide compound
  • Preparation method and device of transition metal lithium oxide compound

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[0043] The present invention provides a kind of preparation method of transition metal lithium oxygen compound, comprises the following steps:

[0044] A) adding the lithium salt and the precursor to the reactor for pre-calcination after mixing;

[0045] The particle size D50 of the lithium salt is 10-20 μm; the particle size D50 of the precursor is 1-20 μm;

[0046] The precursor is one or more of transition metal hydroxy lithium oxy compounds, transition metal hydrogen lithium oxy compounds and transition metal carbonates;

[0047] B) adding the product obtained by pre-calcination into a fluidized bed reactor, performing primary calcination and secondary calcination in sequence to obtain a transition metal lithium oxide compound;

[0048] The raw material for the preparation of the transition metal lithium oxy compound also includes an oxygen-containing main group metal compound, and the oxygen-containing main group metal compound is added in the pre-calcination stage, the ...

Embodiment 1

[0080] A. Put 2.8kg of LiOH·H 2 O, 0.65kg of nano-Al(OH) 3 and 6 kg of Ni with an average particle size of 10 microns 0.8 co 0.1 mn 0.1 (OH) 2 Add high-speed mixer for mixing;

[0081] B. Add the obtained mixture into a fluidized bed reactor A with a diameter of 0.16m. The bottom of the reactor A is conical, and there is an integral surrounding heating device on the outside. The mixture in the reactor A is a columnar packed bed , the depth of the bed is 0.5m. When the temperature starts to rise, the high-purity oxygen is preheated by the preheating device and then passed into the interior of the reactor. To fluidize the material, the reactor A is equipped with an overall surrounding heating device, the heating method is radiation heat transfer, the heat transfer is uniform, and the solid mixture gradually heats up after gas-solid heat exchange and external heating, and the temperature rise rate is 5°C / min , heated to 150°C, and kept for 2 hours. During the heating proces...

Embodiment 2

[0085] A. Put 2.8 tons of LiOH·H 2 O, 0.65 tons of nano-Al(OH) 3 and 6 tons of Ni with an average particle size of 10 microns 0.8 co 0.1 mn 0.1 (OH) 2 mix;

[0086] B. Add the obtained mixture into a fluidized bed reactor A with a diameter of 1.6m. The bottom of the reactor A is conical, and there is an integral surrounding heating device on the outside. The mixture in the reactor A is a columnar packed bed , the depth of the bed is 5m. When the temperature starts to rise, the high-purity oxygen is preheated by the preheating device and then passed into the interior of the reactor. After being back-mixed at the bottom, it is fully in contact with the mixed solid particles. To fluidize the material, the reactor A is equipped with an overall surrounding heating device, the heating method is radiation heat transfer, the heat transfer is uniform, and the solid mixture gradually heats up after undergoing gas-solid heat exchange and external heating, and the heating rate is 5°C...

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Abstract

The invention provides a transition metal lithium oxide compound preparation method, which comprises: A) mixing a lithium salt and a precursor, adding the mixture into a reactor, and pre-calcining, wherein the particle size D50 of the lithium salt is 10-20 [mu]m, the particle size D50 of the precursor is 1-20 [mu]m, and the precursor is one or a plurality of materials selected from a transition metal hydroxyl lithium oxide compound, a transition metal hydrogen lithium oxide compound and a transition metal carbonate; and B) adding the product obtained by the pre-calcining into a fluidized bed reactor, and sequentially carrying out primary calcination and secondary calcination to obtain a transition metal lithium oxide compound, wherein the preparation raw materials of the transition metal lithium oxide compound further comprise an oxygen-containing main group metal compound, the oxygen-containing main group metal compound is added in the pre-calcining stage, the primary calcining stageor the secondary calcining stage after the lithium salt and the precursor are added, and the particle size of the oxygen-containing main group metal compound is 10-100 nm. The invention also providesa fluidized bed reactor.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a preparation method and device of a transition metal lithium oxygen compound. Background technique [0002] The new energy battery industry has greatly alleviated global energy consumption and environmental protection issues. Transition metal lithium oxide compounds are an important part of new energy batteries and have broad market value. [0003] At present, the known method of producing transition metal lithium oxycompounds is to use the burning pot method, put the mixture of the precursor and the lithium compound into the burning pot, then calcined at a high temperature in a roller hearth heating furnace, and then pulverize, wash, and filter dry , surface drying, coating, secondary calcination, secondary pulverization, screening, demagnetization, and batch mixing to obtain the finished powder. The process of this method is complicated, with many product...

Claims

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Application Information

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IPC IPC(8): C01G53/00C01G51/00C01B25/45
CPCC01G53/006C01G51/006C01B25/45C01P2002/72C01P2004/03C01P2004/61C01P2006/12C01P2004/51C01P2006/40C01G53/50C01G51/42C01G45/1221C01G53/42C01P2006/11Y02E60/10B01J6/001B01J8/0055B01J8/24B01J2208/00176B01J2208/00548C01P2004/64
Inventor 张会斌王瑛王金福牛龙伟赵洪东
Owner SHANDONG ZSTONE NEW MATERIAL TECH CO LTD
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