李鑫煜,李刚,廉士俊,由浩男,范天博,李雪,马北越

• 1:辽宁省镁钙无机功能材料工程研究中心
• 2:沈阳化工大学化学工程学院
• 3:辽宁省菱镁矿高值利用工程研究中心
• 4:营口理工学院

摘要(Abstract)：

针对以海淡卤水为原料氨法制备氢氧化镁时，卤水杂质复杂、氢氧化镁结晶调控难、工艺适配性不足的问题，文中先通过氯化钙-氯化钡联合除杂精制工艺除去硫酸根等离子，得到精制卤水；再以氨水为沉淀剂，系统探究氨水滴加速度、反应温度及氨镁比对氢氧化镁纯度、粒径、形貌及镁离子转化率的影响，采用X射线衍射（XRD）、扫描电子显微镜（SEM）、激光粒度分布仪对产物进行表征分析，最后通过Material Studio软件的BFDH(Bravais-Friedel-Donnay-Harker)法对晶体生长习性进行微观计算分析。结果表明，在氨水滴加速度为30 mL·min~(-1)、反应温度为70℃、氨镁比为4.5∶1条件下，得到了镁离子转化率为95.7%、粒径D50为3μm、纯度为99.5%的纳米片状氢氧化镁。研究结论为海水淡化卤水的高值化回收利用及氢氧化镁的绿色规模化制备提供了理论支撑与技术参考。

关键词(KeyWords)： 海淡卤水;氨法;氢氧化镁;卤水精制;结晶调控

Abstract:

Keywords:

基金项目(Foundation): 辽宁省科技计划联合计划（自然科学基金-博士科研启动项目）（2025-BSLH-341）;; 辽宁辽河实验室开放创新基金（LLL24KF-02-01）;; 辽宁省菱镁矿高值利用工程研究中心开放课题（LMKK20240102）

作者(Author): 李鑫煜,李刚,廉士俊,由浩男,范天博,李雪,马北越

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