Method for preparing small-particle size large-bulk cobalt carbonate

Abstract

The invention discloses a method for preparing small-particle size large-bulk cobalt carbonate. The method comprises the following steps: heating an ammonium carbonate base solution of certain concentration; respectively adding soluble cobalt salt and ammonium carbonate into the ammonium carbonate base solution according to certain velocities while stirring to react so as to obtain crystal slurry of cobalt carbonate after a certain time of the reaction; and by taking the crystal slurry of cobalt carbonate as a base solution, adding cobalt salt and ammonium carbonate to react for a certain time, thereby obtaining the target cobalt carbonate. The cobalt carbonate prepared by using the method has the characteristics of being small in particle size and large in bulk density.

Description

Technical field

[0001] The invention relates to the technical field of material preparation, in particular to a preparation method of small particle size and large loose cobalt carbonate. Background technique

[0002] Cobalt carbonate is generally used as a precursor of lithium cobalt oxide battery materials or automobile exhaust catalysts. The particle size of cobalt carbonate largely determines the performance of lithium cobalt oxide battery materials or automobile exhaust catalysts.

[0003] At present, there are many processes for producing cobalt carbonate with a particle size of D50=10-12μm. The specific method is the method of co-currently adding cobalt liquid and ammonium bicarbonate aqueous solution to the reactor (and adding method), and the method of adding cobalt liquid to the ammonium bicarbonate aqueous solution. (Positive addition), the method of adding cobalt liquid to the ammonium bicarbonate aqueous solution (reverse addition), and repeating and adding.

[0004] Ch...

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