水氯镁石和高钙菱镁石制备氢氧化镁  

Preparation of Magnesium Hydroxide from Bischofite and High-calcium Magnesite

作　　者：郭丽莉 李振[1] 王晓民[1] 王耀武 于林辉 王有为 GUO Li-li;LI Zhen;WANG Xiao-min;WANG Yao-wu;YU Lin-hui;WANG You-wei(Liaoning Key Laboratory of Chemical Additive Synthesis and Separation,Yingkou Institute of Technology,Yingkou 115014,Liaoning,China;School of Metallurgy,Northeastern University,Shenyang 110819,China;Yingkou Dongbang Environmental Science and Technology Co.,Ltd.,Yingkou 115100,Liaoning,China)

机构地区：[1]营口理工学院辽宁省化学助剂合成与分离重点实验室,辽宁营口115014 [2]东北大学冶金学院,沈阳110819 [3]营口东邦环保科技股份有限公司,辽宁营口115100

出　　处：《有色金属（冶炼部分）》2022年第1期103-107,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2020YFC1909300);辽宁省教育厅科学研究经费项目(L2020003);辽宁省化学助剂合成与分离重点实验室项目(ZJNK2012);营口理工学院创新团队项目(TD201901)。

摘　　要：氢氧化镁是一种应用广泛的新型绿色环保材料,如何低成本制备高品质氢氧化镁引起广泛关注。以水氯镁石和高钙菱镁石为原料,采用湿法冶金工艺制取氢氧化镁,探讨反应时间、反应温度、水氯镁石浓度、煅烧后物料的粒度等对氢氧化镁纯度的影响。结果表明,在80℃恒温水浴、反应时间6 h、水氯镁石浓度5%、煅后菱镁石粒度-45μm条件下得到的氢氧化镁沉淀纯度可达94.89%,主要物相为Mg(OH)_(2)和CaO。As a new green and environmental protection material,magnesium hydroxide is widely used.How to prepare high-quality magnesium hydroxide at low cost has attracted wide attention.Bischofite and high-calcium magnesite were used as raw materials to prepare magnesium hydroxide by hydrometallurgical process.Influences of reaction time,reaction temperature,bischofite concentration,and particle size of calcined material on purity of magnesium hydroxide were discussed.The results show that magnesium hydroxide precipitate with purity of 94.89% and main phase of Mg(OH)_(2) and CaO is obtained under the conditions including thermostatic waterbath temperature of 80℃,reaction time of 6 h,bischofite concentration of 5%,and particle size of calcined magnesite of-45μm.

关 键 词：水氯镁石 高钙菱镁石 氢氧化镁 除钙 湿法冶金 

分 类 号：TF822[冶金工程—有色金属冶金]