有色金属科学与工程2026，Vol.17Issue(4)：581-589,9.DOI:10.13264/j.cnki.ysjskx.2026.04.010
相对真空下铝热法制备金属镁及镁铝尖晶石
Preparation of magnesium and magnesium aluminum spinel by aluminothermic method under relative vacuum
摘要
Abstract
The process of preparing metallic magnesium and magnesium aluminum spinel with magnesite as the raw material by the aluminothermic method under relative vacuum was studied.The effects of carrier gas flow,briquetting pressure,calcination temperature,aluminum content,reduction temperature and the time on the reduction rate of magnesium oxide,as well as the effects of secondary high-temperature treatment on magnesium aluminum spinel were systematically studied.The phase composition and microstructure of the reduction slag were analyzed by X-ray diffraction(XRD)and scanning electron microscopy with energy dispersive spectroscopy(SEM-EDS).The results showed that a relative vacuum was suitable for the aluminothermic reduction of the magnesium oxide system.When the carrier gas flow was 0.2 m3/h,the pelleting pressure was 15 MPa,and ω(Al)∶ω(2MgO)=1.2,the reduction rate of magnesium oxide exceeded 70%at 1 523 K for 1 h.After secondary high-temperature treatment at 1 923 K,the reduction product increased the grain size of spinel from 0.4 μm to 10.0 μm,increased the content from 78%to 93%,and significantly improved the product's crystallinity.关键词
菱镁矿/相对真空/预制球团/金属镁/镁铝尖晶石Key words
magnesite/relative vacuum/prefabricated pellets/metallic magnesium/magnesium aluminum spinel分类
矿业与冶金引用本文复制引用
李鑫,郭军华,王永彪,张廷安..相对真空下铝热法制备金属镁及镁铝尖晶石[J].有色金属科学与工程,2026,17(4):581-589,9.基金项目
河南省自然科学基金资助项目(252300421576) （252300421576）
河南省科技攻关资助项目(242102230069) （242102230069）
郑州轻工业大学博士科研基金资助项目(2024BSJJ003) （2024BSJJ003）
中国机械总院技术发展基金资助项目(203YJ2023004) （203YJ2023004）
