菱镁矿酸浸液制备高纯氢氧化镁  

Preparation of High Purity Magnesium Hydroxide from Magnesite Acid Leaching Solution

作　　者：白晶 杨家贺 李刚 顾惠敏[2] 黄福妍 孟雨菲 郑竣桐 BAI Jing;YANG Jia-he;LI Gang;GU Hui-min;HUANG Fu-yan;MENG Yu-fei;ZHENG Jun-tong(Yingkou Institute of Technology,Yingkou 115004,Liaoning,China;Northeastern University,Shenyang 110819,China)

机构地区：[1]营口理工学院,辽宁营口115004 [2]东北大学,沈阳110819

出　　处：《有色金属（冶炼部分）》2022年第7期38-42,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：辽宁省教育厅科技研究资助项目(LJKZ1195);营口理工学院引进高层次人才科研启动项目(110505013);营口理工学院创新团队支持计划资助项目(TD202001)。

摘　　要：采用低品位菱镁矿酸浸得到的硫酸镁溶液为原料,以氨水为沉淀剂制备出了纯净度高且性能优良的高纯氢氧化镁。通过改变硫酸镁浓度、反应时间和温度、氨水浓度、陈化温度和陈化时间,考察不同条件下镁的沉淀效果。确定的最佳工艺条件为:陈化温度55℃、陈化时间60 min、硫酸镁溶液浓度1.5 mol/L、反应时间50 min、反应温度55℃、氨水浓度21%,在此条件下Mg^(2+)的沉淀率可达到90%以上。所得样品氢氧化镁晶型完整,粒径小且均匀,呈规则球状,有少量的团聚现象,平均粒径2μm左右,纯度达到99.5%以上,高于工业用氢氧化镁一级品标准(HG/T 3607—2000)的要求。High purity magnesium hydroxide with high purity and excellent performance was prepared by applying magnesium sulfate solution obtained from acid leaching of low-grade magnesite as raw material and ammonia as precipitant.The precipitation effect of magnesium under different conditions was investigated by changing concentration of magnesium sulfate,reaction time and temperature,ammonia concentration,aging temperature and aging time.The precipitation rate of Mg^(2+) is 90% above under the optimum process conditions including aging temperature of 55℃,aging time of 60 min,magnesium sulfate solution concentration of 1.5 mol/L,reaction time of 50 min,reaction temperature of 55℃,and ammonia concentration of 21%.The obtained magnesium hydroxide sample has complete crystal form,small and uniform particle size,regular spherical,with a few agglomerations.The average particle size is about 2μm,and the purity is above 99.5%,which is higher than the requirements of industrial magnesium hydroxide Grade I product standard(HG/T 3607—2000).

关 键 词：菱镁矿 硫酸镁 氨水 氢氧化镁 高纯 

分 类 号：TG142.33[一般工业技术—材料科学与工程]