中高镍三元前驱体制备影响因素研究  

Study on the Influence Factor of Medium and High Nickel Ternary Precursor Preparation

作　　者：杨洋 张素良 高策 YANG Yang;ZHANG Suliang;GAO Ce

机构地区：[1]中冶瑞木新能源科技有限公司,河北唐山063200

出　　处：《绿色矿冶》2023年第2期49-54,共6页Sustainable Mining and Metallurgy

摘　　要：本文讨论镍钴锰三元前驱体制备过程中的反应机理,以及制备中高镍前驱体Ni_(65)Co_(7)Mn_(28)(OH)_(2)过程中含固量、搅拌速度、氢氧化钠浓度、反应温度、氨水浓度、pH值对三元前驱体比表面积、振实密度、粒度分布宽度等物性指标的影响。实验结果表明,随着含固量升高,三元前驱体振实密度逐渐增大,比表面积变小,粒度分布宽度无明显变化;随着搅拌速度的升高,三元前驱体振实密度逐渐增大,比表面积变小,粒度分布宽度变宽;随着反应温度升高,三元前驱体振实密度逐渐变小,比表面积增大,粒度分布宽度变窄;随着氨水浓度升高,三元前驱体振实密度逐渐增大,比表面积变小,粒度分布宽度无明显变化;随着氢氧化钠浓度增加,三元前驱体振实密度逐渐增大,比表面积变小,粒度分布宽度变宽;pH值升高时,比表面积增加明显,振实密度和粒度分布宽度变化不明显。在含固量84 g/L、氢氧化钠浓度4 mol/L、搅拌速度135 r/min、氨水浓度5.5 g/L、反应温度65℃、pH值10.8条件下制备的三元前驱体品质较为理想。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 Ni_(65)Co_(7)Mn_(28)(OH)_(2)in the preparation of medium high nickel precursor Ni_(65)Co_(7)Mn_(28)(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 84 g/L,sodium hydroxide concentration 4 mol/L,stirring speed 135 r/min,ammonia concentration 5.5 g/L,reaction temperature 65℃is relatively ideal.

关 键 词：三元前驱体 中高镍 共沉淀反应 工艺参数 

分 类 号：TF815[冶金工程—有色金属冶金] TQ139.2[化学工程—无机化工]