撞击流反应-沉淀法制备氢氧化镁超细粉体  

Preparation of Magnesium Hydroxide Ultrafine Powder by Impinging Stream Reaction-Precipitation Method

作　　者：张忠闯 冯颖[1] 董鑫[1] 闫宇航 张建伟[1] ZHANG Zhong-chuang;FENG Ying;DONG Xin;YAN Yu-hang;ZHANG Jian-wei(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang Liaoning 110142,China)

机构地区：[1]沈阳化工大学机械与动力工程学院,辽宁沈阳110142

出　　处：《辽宁化工》2023年第9期1241-1243,1248,共4页Liaoning Chemical Industry

基　　金：国家自然科学基金项目(项目编号:21476141);辽宁省“兴辽英才计划”高水平创新创业团队项目(项目编号:XLYC1808025);中央引导地方科技发展专项(项目编号:2020JH6/10500051)。

摘　　要：以六水合氯化镁和氢氧化钠为原料,利用撞击流反应器采用反应-沉淀法制备超细氢氧化镁粉体。采用单因素分析方法考察了镁离子浓度、进料流量、循环撞击时间、温度和搅拌时间等对粉体平均粒径的影响。结果表明:物料浓度和进料流量以及循环撞击时间对氢氧化镁粉体平均粒径影响较大,在氯化镁浓度为0.75 mol·L^(-1)、进料流量为300 L·h^(-1)、循环撞击时间为60 min的最优条件下,制得的超细氢氧化镁粉体粒径分布均匀,其平均粒径为1.152μm。Ultrafine magnesium hydroxide powder was prepared by reaction precipitation method using magnesium chloride hexahydrate and sodium hydroxide as raw materials in an impinging stream reactor.The single factor analysis method was used to investigate the effects of magnesium ion concentration,feed flow rate,cycle impact time,temperature and stirring time on the average particle size of the powder.The results showed that compared with the traditional stirring method,the complete mixing time of the impinging stream reactor was shorter.The material concentration,feed flow rate and cycle impact time had great influence on the average particle size of magnesium hydroxide powder.Under the optimal conditions of magnesium chloride concentration of 0.75 mol·L^(-1),feed flow of 300 L·h^(-1)and cycle impact time of 60 min,the particle size distribution of superfine magnesium hydroxide powder was uniform,and the average particle size was 1.152μm.

关 键 词：撞击流 反应沉淀法 氢氧化镁 超细粉体 结晶 

分 类 号：TK124[动力工程及工程热物理—工程热物理]