反应器内流场分布对球形氢氧化镍生长结晶的影响（英文）  

Influence of Flow Field Distribution on the Crystallization of Spherical Nickel Hydroxide in Reactor

作　　者：唐俊杰[1] 刘燕[1] 田磊[1] 王东兴[1] 张廷安[1] 

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,沈阳110819

出　　处：《无机化学学报》2016年第7期1127-1134,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家国家自然科学基金云南联合重点基金(No.U1402271,U1202274)资助项目

摘　　要：在相同停留时间、不同搅拌桨线速度条件下,利用化学沉淀法制备球形氢氧化镍样品并运用SEM技术考察制得样品的形貌。研究表明:在相同的停留时间和化学条件下,随着搅拌桨线速度的提高样品的微观形貌由无定型状晶体变为大颗粒类球状晶体再变为较规则的球状晶体。利用PIV物理模拟技术模拟反应器内流场分布情况并结合XRD表征结果分析得出:在相同的停留时间和化学条件下,反应器内流场分布越均匀、速度矢量越大氢氧化镍晶体的生长越完整,结晶性、球形度和相对结晶度越高,并从流场分布的角度描述了球形氢氧化镍生长结晶的过程。The spherical nickel hydroxide was synthesized by chemical precipitation method under the conditions of the same stay time but different linear velocities of the stirring blades. Then the morphologies of the spherical Ni（OH）2 were characterized by SEM. In the same retention time and chemical condition, it was found that with increasing the linear velocity, the morphology of the spherical Ni（OH）2 changed from amorphous crystals to large near spherical particles at first, and then to regular spherical crystals finally. The flow field distribution in the reactor was simulated by PIV physical model technology. And XRD results show that in the same retention time and chemical condition, more uniform flow field distribution in the reactor and higher velocity vector can lead to more complete Ni（OH）2 crystals, higher relative crystallinity and higher degree of sphericity. Moreover, the crystallization process of spherical Ni（OH）2 was described from the flow field viewpoint.

关 键 词：球形氢氧化镍 流场分布 相对结晶度 生长结晶 

分 类 号：O614.813[理学—无机化学]