| 硫酸镁还原热解制备高纯氧化镁 |
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| 引用本文： | 张萍,冯雅丽,李浩然,汪平,刘欣伟.硫酸镁还原热解制备高纯氧化镁[J].中南大学学报(自然科学版),2011(9). |
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| 作者姓名： | 张萍 冯雅丽 李浩然 汪平 刘欣伟 |
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| 作者单位： | 北京科技大学土木与环境学院;中国科学院过程工程研究所生化工程国家重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(20876160); 国家高技术研究发展计划(“863”计划)项目(2007AA05Z158) |
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| 摘 要： | 用菱镁矿和工业纯硫酸来制备七水硫酸镁,进一步脱水得到无水硫酸镁。以无水硫酸镁和木炭粉为原料,经高温煅烧制备高纯氧化镁。研究反应物的配比、煅烧温度、煅烧时间以及粒径对产品纯度的影响。采用X线衍射和扫描电镜对样品进行表征。通过单因素实验确定的最佳工艺条件为:硫酸镁和炭粉的最佳配比8:1,煅烧时间2 h,煅烧温度800℃,粒径109μm。研究结果表明:在最佳工艺下,样品纯度达到99%,粒径分布介于109～700μm之间,单分子表面为多孔蓬松高比表面。
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| 关 键 词： | 菱镁矿 硫酸镁 木炭粉 高纯氧化镁 煅烧 |
Preparation of high-purity magnesia by solid phase reduction decomposition of magnesium sulfate |
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| ZHANG Ping,FENG Ya-li,LI Hao-ran,WANG Ping,LIU Xin-wei.Preparation of high-purity magnesia by solid phase reduction decomposition of magnesium sulfate[J].Journal of Central South University:Science and Technology,2011(9). |
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| Authors: | ZHANG Ping FENG Ya-li LI Hao-ran WANG Ping LIU Xin-wei |
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| Institution: | ZHANG Ping1,2,FENG Ya-li1,LI Hao-ran2,WANG Ping1,LIU Xin-wei1,2 (1.School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China,2.Key State Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Science,Beijing 100190,China) |
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| Abstract: | Magnesium sulfate heptahydrate prepared by magnesite and commercial sulfuric acid was dehydrated to prepare anhydrous magnesium sulfate.High-purity magnesia was obtained by commercial magnesium sulfate and charcoal powder.The influences of the reactants ratio,calcination temperature and time and diameter of particles on the purity of prepared magnesium oxide were investigated.The optimum processing parameters of precipitation were obtained by single factor experiments.The morphology of the magnesia was char... |
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| Keywords: | magnesite magnesium sulfate charcoal powder high-purity magnesium oxide calcination |
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