Sustainable Mining and Metallurgy

This paper discussed the reaction mechanism in the preparation of nickel cobalt manganese ternary precursor, and the effects of solid content, sodium hydroxide concentration, stirring speed, ammonia concentration, reaction temperature, and pH on the specific surface area, tap density and particle size distribution width of the ternary precursor Ni₆₅Co₇Mn₂₈ (OH)₂ in the preparation of medium high nickel precursor Ni₆₅Co₇Mn₂₈(OH)₂. The experimental results show that with the increase of solid content, the tamping density of the ternary precursor increases gradually, the specific surface area decreases, and the particle size distribution width has no obvious change; With the increase of stirring speed, the tamping density of the ternary precursor gradually increases, the specific surface area becomes smaller, and the particle size distribution width becomes wider; With the increase of reaction temperature, the tamping density of ternary precursor gradually decreases, the specific surface area increases, and the particle size distribution width narrows; With the increase of ammonia concentration, the tamping density of ternary precursor gradually increases, the specific surface area becomes smaller, and the particle size distribution width has no obvious change; With the increase of sodium hydroxide concentration, the tamping density of the ternary precursor gradually increases, the specific surface area becomes smaller, and the particle size distribution width becomes wider; When the pH value increases, the specific surface area increases significantly, but the tap density and particle size distribution width do not change significantly. The quality of the ternary precursor prepared under the conditions of solid content 84g/L, sodium hydroxide concentration 4mol/L, stirring speed 135r/min, ammonia concentration 5.5g/L, reaction temperature 65℃ is relatively ideal.