Method and apparatus for preparing high-intensity cobaltic-cobaltous oxide power

A technology of cobalt tetroxide and high density, applied in cobalt oxide/cobalt hydroxide and other directions, can solve the problems of poor product quality, difficult implementation and large investment, and achieve the effects of high product quality, convenient process system, simple process and equipment

Inactive Publication Date: 2008-10-01
CENT SOUTH UNIV
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Problems solved by technology

[0005] The object of the present invention is to propose a method and equipment for preparing high-density cobalt tetroxide in view of the shor

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  • Method and apparatus for preparing high-intensity cobaltic-cobaltous oxide power
  • Method and apparatus for preparing high-intensity cobaltic-cobaltous oxide power

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Embodiment Construction

[0014] The technical solution invented is described in detail below.

[0015] Such as figure 1 As shown, the CoCl used in the present invention 2 The raw material is battery-grade CoCl 2 ·6H 2 O, it is prepared by pulverizing after heating and vacuum dehydration at a temperature of 250°C, with a particle size of 100-400 mesh. The oxygen content of the reaction gas is 21-50%. Generally, air can be used, or oxygen can be added to the air; the water in the reaction gas is delivered to the atomizer by a metering pump, and the water is sprayed after atomization High-temperature gas flow is added in gasification. Therefore, the moisture content in the high-temperature oxidizing gas is controllable. Generally, it is added at 100-120% of the stoichiometric amount. If it is too high, the exhaust gas dew point will increase, causing the dust collection system to work only at high temperatures. It is difficult to choose the material of the dust collecting bag during operation.

[0016] The ...

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Abstract

The invention provides a method for preparing Co3O4 (tricobalt tetreoxide) powder with high density and equipment thereof. Anhydrous CoCl2 is taken as raw material, the granularity of which is 100 to 400 meshes, and added into a reaction furnace to be fully mixed with oxidizing gas that contains water vapour at a motion state under 500 to 1000 DEG C for reaction so as to generate the Co3O4 powder. The equipment comprises a furnace body, the upper part of which is a drum body provided with a feeding tube and a discharging tube of airflow and products; the lower part of the furnace body is a conical tube, the bottom end of which is provided with a slag discharging tube, and the conical surface of the lower end of the conical tube is connected with a warm-air tube. The technique process of the method and the equipment of the invention are simple, the process system of the invention is convenient for controlling and regulating, reaction products only contain two phases of gas and solid, which are easy to be separated, then treatment procedures are carried out, namely, separation of the gas and the solid, washing, drying and classification of the powder, recovery of HCl gas, etc. are connected with the prior art, therefore, the quality of the products is high and no pollution is caused in the production process.

Description

Technical field [0001] The invention relates to a method and equipment for preparing high-density cobalt tetroxide powder. The raw material is cobalt chloride. Background technique [0002] Cobalt tetroxide is the cathode material LiCoO for manufacturing lithium ion batteries 2 Raw materials. At present, the main method of industrial production of cobalt tetroxide is the wet precipitation-calcination method, which has two specific processes. One is to use ammonium bicarbonate as a precipitant, add it to the cobalt salt solution to form a basic cobalt carbonate precipitate, filter, wash and dry, and then calcinate at a high temperature of about 800°C to obtain a cobalt tetroxide product. The second is to use NaOH as a neutralizing agent, and under the conditions of controlling temperature and pH value, Co(OH) is hydrolyzed and precipitated from the cobalt salt solution. 2 , And then calcined at a high temperature of about 800 ℃ to obtain cobalt tetroxide product. The advantages of...

Claims

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Application Information

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IPC IPC(8): C01G51/04
Inventor 刘志宏李启厚李玉虎刘智勇胡雷
Owner CENT SOUTH UNIV
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