Experimental study by online measurement of the precipitation of nickel hydroxide: Effects of operating conditions  

作　　者：Weiwei E Jingcai Cheng Chao Yang Zaisha Mao 

机构地区：[1]Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences [2]Jiangsu Marine Resources Development Research Institute

出　　处：《Chinese Journal of Chemical Engineering》2015年第5期860-867,共8页中国化学工程学报（英文版）

基　　金：the State Key Development Program for Basic Research of China(2013CB632601);the National High Technology Research and Development Program of China(2011AA060704);the National Natural Science Foundation of China(21476236,91434126);the National Science Fund for Distinguished Young Scholars(21025627)

摘　　要：The objective of this work is using the online measurement method to study the process of precipitation of nickel hydroxide in a single-feed semi-batch stirred reactor with an internal diameter ofD = 240mm. The effects of impeller speed, impeller type, impeller diameter and feed location on the mean particle size d43 and particle size distribution （PSD） were investigated, d43 and PSD were measured online using a Malvern Insitec Liquid Pro- cess Sizer every 20 s. It was found that d43 varied between 13 kwh and 26 lain under different operating conditions, and it decreased with increasing impeller diameter. When feeding at the off-bottom distance of D/2 under lower impeller speeds, d43 was significantly smaller than that at D/3. PSDs were slightly influenced by operating conditions.The objective of this work is using the online measurement method to study the process of precipitation of nickel hydroxide in a single-feed semi-batch stirred reactor with an internal diameter of D = 240 mm. The effects of impeller speed, impeller type, impeller diameter and feed location on the mean particle size d43 and particle size distribution(PSD) were investigated. d43 and PSD were measured online using a Malvern Insitec Liquid Process Sizer every 20 s. It was found that d43 varied between 13 μm and 26 μm under different operating conditions,and it decreased with increasing impeller diameter. When feeding at the off-bottom distance of D/2 under lower impeller speeds, d43 was significantly smaller than that at D/3. PSDs were slightly influenced by operating conditions.

关 键 词：Nickel hydroxide Precipitation Particle size distribution Online measurement Stirred tank Mixing 

分 类 号：TQ138.13[化学工程—无机化工]