文献类型：期刊文献

中文题名：超重力技术制备分散性碳酸锂超细粉体

英文题名：Preparation of dispersive lithium carbonate ultrafine powder by high gravity technology

作者：段绍君[1,2];宋兴福[1,2];孙玉柱[1,2];于建国[1,2]

机构：[1]华东理工大学国家盐湖资源综合利用工程技术研究中心,上海200237;[2]上海污染控制与生态安全研究院,上海200092

年份：2019

卷号：47

期号：1

起止页码：10

中文期刊名：化学工程

外文期刊名：Chemical Engineering(China)

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家自然科学基金资助项目(51574126);国家重点研发计划项目(2016YFC0401203);上海市优秀学术/技术带头人计划(18XD1424600)

语种：中文

中文关键词：超重力;碳酸锂;旋转填料床;反应结晶

外文关键词：high gravity;lithium carbonate;RPB;reactive crystallization

摘要：针对传统沉淀法中存在的问题,提出了一种新的液液反应制备碳酸锂的技术——超重力-旋转填料床制备超细碳酸锂粉体,考察了反应器稳定时间、转盘转速、进料速度和陈化时间对产物粒径分布的影响,并将之与夹套反应器最优化结果进行对比,采用扫描电镜(SEM)和马尔文粒度分析(Malvern)对产物的形貌和粒径进行表征。研究结果表明,超重力技术制备超细碳酸锂粉体的最佳工艺为:反应器稳定时间2 min、转盘转速3 000 r/min,流速250 mL/min、陈化时间6 h;超重力技术强化了微观混合,相比传统方法制备出的产品形貌较好,无杂相,粒径分布更加均一,达到了电池级碳酸锂对粒径分布的要求。
Aiming to solving the problems of traditional liquid precipitation method,lithium carbonate ultrafine powder was prepared by a supergravity-rotating packed reactor(RPB).The effects of stabilize time,rotation speed,feed rate and aging time on crystal size distribution of product were investigated.The supergravity-rotating packed reactor was compared with traditional jacketed reactor,and the morphology and particle size of the product were characterized by SEM and Malvern.The optimum operating condition was obtained as follows:the stability time of 2 min,rotating speed of 3 000 r/min,feeding rate of 250 mL/min and aging time of 6 h.The remarkable micro mixing intensification of the RPB facilitates the formation of lithium carbonate with narrow particle size distribution and regular morphology,which meets Chinese standards for battery grade product.