Production equipment and technique for ultramicro powder of cobalt carbonate

Abstract

The present invention discloses a production equipment of ultramicrofine cobaltous carbonate powder and its production process. Said production equipment includes cobalt salt header tank, precipitating agent header tank, reactor under two header tanks, stirrer placed in the reactor, sieve-plate fixed on the stirring shaft, material-discharging hole positioned in the lower end of the reactor and ageing tank, and the top of the above-mentioned every header tank is equipped with a material inlet, and its lower portion has a material liquor outlet. Besides, said invention also provides the concrete technological condition for producing ultramicrofine cobaltous carbonate powder.

Description

technical field [0001] The invention relates to a production device and process of ultrafine cobalt carbonate powder. Background technique [0002] Cobalt products such as ultra-fine cobalt powder and cobaltous oxide are widely used as powder materials in many fields such as battery materials and catalysts. Especially used as an activator for high-energy batteries - cobaltous oxide powder, not only the chemical composition is very demanding, but also the physical and chemical properties are more demanding. The equipment for preparing cobaltous oxide powder is a settling tank with agitator at present, and the preparation method all adopts precipitating agent (Na 2 CO 3 , NH 4 HCO 3 or (NH 4 ) 2 C 2 o 4 ) is directly added to the cobalt salt aqueous solution precipitation tank for precipitation to produce intermediate products such as cobalt carbonate or cobalt oxalate. Using this kind of production device, the production can only be carri...

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Problems solved by technology

Using this kind of production device, the production can only be carried out intermittently, the production efficiency is low, the product quality is unstable, and the temperature of the precipitation reaction and the pH value of the reaction solution are also difficult to adjust; and this direct precipitation feeding method is even more fatal. The disadvantage is that it is easy to produce too alkali, the obtained cobalt carbonate or cobalt oxalate powder is unevenly distributed, the particle size and shape are irregular, and it is difficult to prepare spherical fine particles with large specific surface area, so this cobalt carbonate powder is used as raw material It is difficult to produce cobaltous oxide powder with large specific surface area, uniform particle size, spherical shape, small loose ratio and excellent activity

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