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New process for preparing high quality Co3O4

A high-quality technology of cobalt tetroxide, applied in cobalt oxide/cobalt hydroxide and other directions, can solve the problems of difficult control of product morphology and particle size, inability to meet manufacturing, and unstable production, and to simplify process control and equipment maintenance and improvement. The effect of production efficiency and single appearance

Inactive Publication Date: 2008-07-02
南通奥克赛德新材料有限公司
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to solve the problems of large equipment investment, long flow process, high energy consumption, serious environmental pollution, high cost, unstable production, product appearance and particle size in the preparation of cobalt tetroxide by traditional spray roasting and precipitation-sintering methods It is difficult to control and cannot meet the requirements of manufacturing lithium cobalt oxide; but to provide a process with advanced technology, stable production, no sewage discharge, and a small amount of acid gas produced can be absorbed as by-products, which is conducive to environmental protection, less investment in equipment, and low production costs. A new method for preparing high-quality cobalt tetroxide with short time, low energy consumption, good product quality and high yield

Method used

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  • New process for preparing high quality Co3O4
  • New process for preparing high quality Co3O4
  • New process for preparing high quality Co3O4

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Embodiment

[0027] Cobalt salt CoCl containing water of crystallization 2 ·xH 2 O or Co(NO 3 ) 2 ·xH 2 O or CoSO 4 ·xH 2 O or Co(AC) 2 ·xH 2 O, (x=1~6) is filled in a corundum crucible, pushed into the special reaction furnace of the present invention, raised to 850°C at a heating rate of 5°C / min and calcined for 15 hours, so that the granular crystal form can be further grown completely, and finally Collected by natural cooling to obtain a powder with an average particle size of 3-8μm and a tap density of 2.2-2.8g / cm 3 , ray diffraction phase analysis shows that the powder is a pure phase of Co 3 o 4 ; The gas generated during roasting is introduced into the condenser by the induced draft fan to be cooled and pre-collected, and then passed into a special absorption device to completely absorb and make acid. As a by-product, the obtained powder can fully meet the requirements for the preparation of lithium-ion secondary batteries. Requirements for the cathode material lithium co...

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Abstract

In the new process of preparing high quality Co3O4 product, Co salt with crystalline water is loaded into corundum crucible or other special container at normal pressure, roasted at 250-900 deg.c in special reaction furnace for 5-20 hr for growing complete crystal grain, and finally cooled naturally, so as to obtain Co3O4 powder in single polygonal cube structure and with complete crystal form and high density. The production process is environment friendly, short in time, low in cost, high in yield and high in product quality.

Description

technical field [0001] The invention relates to a metal oxide manufacturing technology, in particular to a method for preparing high-quality cobalt tetroxide by one-step direct roasting of cobalt hydrate salt. Background technique [0002] The wide application of new energy secondary lithium ion technology has promoted the rapid expansion of the preparation technology and production scale of lithium cobalt oxide materials used in lithium ion battery cathode materials in my country, especially lithium cobalt oxide materials with battery grade cobalt tetroxide as the main raw material. As the preferred raw material for positive electrode materials, the preparation technology of battery-grade cobalt trioxide has also become one of the key issues in the preparation technology of positive electrode materials. At present, there are mainly two ways to prepare tricobalt tetroxide. The one is to adopt the spray roasting of cobalt salt solution (led by Umicore company in Belgium), whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/04
Inventor 胡国荣
Owner 南通奥克赛德新材料有限公司
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