真空下CO_2/CO对镁蒸气冷凝的影响

详细信息    查看全文 | 推荐本文 |

英文篇名：Influence of CO_2 and CO on magnesium vapor condensation in vacuum 作者：熊能 ; 田阳 ; 杨斌 ; 刘大春 ; 徐宝强 ; 曲涛 ; 戴永年 ; 刘海 英文作者：XIONG Neng;TIAN Yang;YANG Bin;LIU Da-chun;XU Bao-qiang;QU tao;DAI Yong-nian;LIU Hai;State Key Laboratory of Complex Non-ferrous Metal Resources Clear Utilization,Kunming University of Science and Technology;National Engineering Laboratory for Vacuum Metallurgy,Kunming University of Science and Technology;Key Laboratory of Vacuum Metallurgy for Nonferrous Metal of Yunnan Province;School of Metallurgy and Energy Engineering, Kunming University of Science and Technology; 关键词：镁蒸气 ; CO ; CO_2 ; 真空 ; 冷凝 英文关键词：magnesium vapor;;CO;;CO_2;;vacuum;;condensation 中文刊名：ZYXZ 英文刊名：The Chinese Journal of Nonferrous Metals 机构：昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室;昆明理工大学真空冶金国家工程实验室;云南省有色金属真空冶金重点实验室;昆明理工大学冶金与能源工程学院; 出版日期：2019-04-15 出版单位：中国有色金属学报 年：2019 期：v.29;No.241 基金：国家自然科学基金重点项目(51734006);; 云南省中青年学术科技带头人后备人才项目(2017HB009)~~ 语种：中文; 页：ZYXZ201904022 页数：7 CN：04 ISSN：43-1238/TG 分类号：193-199

摘要

针对真空碳热还原法炼镁过程镁蒸气发生逆反应这一关键问题,研究了真空条件下CO_2/CO分别对镁蒸气冷凝的影响,以期为该过程中镁蒸气的安全高效冷凝并收集提供理论依据。结果表明:30Pa下镁蒸气的冷凝是直接由气态变为固态的凝华过程;在系统压强30 Pa、加热温度700～800℃保温30 min的条件下,CO_2会使冷凝物表面结晶形貌不平整,但不会与镁蒸气发生化学反应;在相同实验条件下,CO会与镁发生化学反应,所得到的冷凝物含镁、氧、碳元素,这阻碍镁蒸气冷凝成形貌规则的晶体。
        Aiming at the key problem of reverse reaction of magnesium vapor in vacuum carbothermal reduction method,the effects of CO_2/CO on magnesium vapor condensation under vacuum conditions were studied, which is to provide theoretical basis for safe and efficient condensation and collection of magnesium vapor in the process. The results show that the condensation of magnesium vapor is a desublimation process from gas to solid at 30 Pa. In addition, when the system pressure is 30 Pa, the heating temperature is 700-800 ℃ and is kept for 30 min, CO_2 can make the crystalline morphology of the condensate uneven, but cannot react with magnesium vapor. And under the same experimental conditions, CO can chemically react with magnesium. The obtained condensate contains magnesium, oxygen and carbon.CO can hinder the magnesium vapor to condensate into the regular crystal.

引文

[1]马鸿文,曹瑛,蒋芸,吴秀文,刘玉芹.中国金属镁工业的环境效应与可持续发展[J].现代地质,2008,22(5):829-837.MA Hong-wen,CAO Ying,JIANG Yun,WU Xiu-wen,LIUYu-qin.Environmental Impacts and sustainable developments of magnesium smelting industry in China:AReview[J].Geoscience,2008,22(5):829-837.
    [2]刘艳飞,张艳,于汶加,刘璇.全球原镁需求预测及中国合理产能分析[J].资源科学,2015,37(5):1047-1058.LIU Yan-fei,ZHANG Yan,YU Wen-jia,LIU Xuan.Analysis and forecast of world primary magnesium demand and reasonable productivity for China[J].Resources Science,2015,37(5):1047-1058.
    [3]MORDIKE B L,EBERT T.Magnesium properties application-potential[J].Materials Science and Engineering A,2001,302(1):37-45.
    [4]钟胜.氧化镁真空碳热还原研究[D].昆明:昆明理工大学,1998.ZHONG Sheng.Vacuum carbothermic reduction of magnesium oxide[D].Kunming:Kunming University of Science and Technology,1998.
    [5]DAS S.Primary magnesium production cost for automotive application[J].JOM,2008,60(11):63-69.
    [6]TIAN Y,QU T,YANG B,DAI Y N,XU B Q,GENG S.Behavior analysis of Ca F2 in magnesia carbothermic reduction process in vacuum[J].Metallurgical and Materials Transactions B,2012,43(3):657-661.
    [7]田阳,杨斌,刘红湘,杨成博,曲涛,戴永年,彭鹏.氧化镁在真空碳热还原法炼镁过程中行为研究[J].真空科学与技术学报,2013,33(9):920-925.TIAN Yang,YANG Bin,LIU Hong-xiang,YANG Cheng-bo,QU Tao,DAI Yong-nian,PENG Peng.Behavior of magnesia in Mg extraction by carbothermic reduction in vacuum[J].Chinese Journal of Vacuum Science and Technology,2013,33(9):920-925.
    [8]BROOKS G,NAGLE M,TASSIOS S,TRANG S,HASANN.The physical chemistry of the carbothermic route to magnesium[J].JOM,2006,58(5):25-31.
    [9]BROOKS G,TRANG S,WITT P J,KHAN M N H,NAGLEM.The carbothermic route to magnesium[J].JOM,2006,58(5):51-55.
    [10]PRENTICE L H,NAGLE M,BARTON T R D,TASSIOS S,KUAN B T,WITT P J,CONSTANTI-CAREY K K.Carbothermal production of magnesium:CSIRO'SMag Sonic?process[C]//Essential Readings in Magnesium Technology,TMS,2012:127-131.
    [11]YANG C B,TIAN Y,QU T,YANG B,XU B Q,DAI Y N.Magnesium vapor nucleation in phase transitions and condensation under vacuum conditions[J].Transaction of Nonferrous Metals Society of China,2014,24(2):561-569.
    [12]YANG C B,TIAN Y,QU T,YANG B,XU B Q,DAI Y N.Analysis of the behavior of magnesium and CO vapor in the carbothermic reduction of magnesia in a vacuum[J].Journal of Magnesium and Alloys,2014,2(1):50-58.
    [13]TIAN Y,XU B Q,YANG B,Yang C B,LIU D C,DAI Y N.Magnesium production by carbothermic Reduction in Vacuum[J].Journal of Magnesium and Alloys,2015,3(2):149-154.
    [14]刘海,田阳,杨斌,刘大春,徐宝强,曲涛,戴永年.真空碳热还原氧化镁制取金属镁的冷凝实验研究[J].真空科学与技术学报,2015,35(7):867-871.LIU Hai,TIAN Yang,YANG Bin,LIU Da-chun,XUBao-qiang,QU Tao,DAI Yong-nian.Condensation of Mg-vapor in vacuum carbothermic reduction of magnesia[J].Chinese Journal of Vacuum Science and Technology,2015,35(7):867-871.
    [15]曲涛,戴永年,杨斌,田阳,刘大春,徐宝强.真空碳热还原炼镁的研究[J].真空,2014(4):11-18.QU Tao,DAI Yong-nian,YANG Bin,TIAN Yang,LIUDa-chun,XU Bao-qiang.Research of magnesium extraction by carbothermic reduction in vacuum[J].Vacuum,2014(4):11-18.
    [16]杨成博.真空碳热法炼镁过程中镁蒸气冷凝的实验研究[D].昆明:昆明理工大学,2013.YANG Cheng-bo.Experimental investigation on vapor condensation of magnesium by vacuum carbothermal method[D].Kunming:Kunming University of Science and Technology,2013.
    [17]夏绍龙.金属蒸气冷凝法制取高纯镁粉[J].轻金属,1987(6):44-49.XIA Shao-long.Preparation of high pure magnesium powder by vapor condensation of metals[J].Light Metals,2014,2(1):50-58.