硅热法炼镁还原工序节能减排技术进展  

The Progress of Technologies for Energy Saving and Emission Reduction in Reduction Process of Magnesium Production by Silicothermic Reduction

作　　者：李航[1,2] 李爱听[1,3] 游国强[3,4] 胡锋[1,2] 

机构地区：[1]外生成矿与矿山环境重庆市重点实验室重庆地质矿产研究院,重庆400042 [2]煤炭资源与安全开采国家重点实验室重庆研究中心,重庆400042 [3]重庆大学材料科学与工程学院,重庆400045 [4]国家镁合金材料工程技术研究中心,重庆400044

出　　处：《材料导报（纳米与新材料专辑）》2011年第2期229-233,共5页

基　　金：重庆市重大科技攻关项目(CSTC009AA4002);重庆市国土资源和房屋管理局科技计划项目"提高重庆市白云岩利用率的炼镁关键技术研究";重庆大学大型仪器设备开放基金(2010011507)

摘　　要：还原工序是硅热法炼镁的最大能耗和排放工序,其主要工艺影响因素包括配料、真空系统、燃烧加热技术、还原罐寿命、还原炉结构以及镁还原渣处理。分别分析了各工艺因素对炼镁能耗和排放的影响机理,重点综述了还原工序节能减排技术的最新研发进展及其应用现状,最后对其发展方向进行了展望:(1)采用微机配料;(2)在机械泵前加水环泵或利用蒸汽射流泵代替机械泵进行抽真空;(3)采用蓄热燃烧技术;(4)开发新的还原罐材质以提高其寿命;(5)调整还原炉结构,延长烟气在炉内停留时间、提高还原罐密集度,或采用竖式炼镁还原炉;(6)机械化出渣、回收渣料热量并对还原渣进行再利用。The reduction process causes most energy consumption and emission among all the processes of magnesium production by silicothermic reduction; its main influence elements technicaUy are as follows： feed proportioning, vacuum system, combustion heating technology, service life of the reduction pot, structure of the reduction furnace and disposal of the magnesium slag. Then, the elements＇ influence mechanisms on energy consumption and emission in magnesium production are analyzed separately. The new processes of research and development and their application status of energy saving and emission reduction technologies are summarized. Finally, an outlook has been given to the trends of the technologies： （1）The microcomputer proportioning system is adopted. （2）The water ring pump is assigned before the mechanical pump or jet vacuum pump is utilized singly. （3）Regenerative combustion technology is employed. （4）New materials are developed to prolong pots＇ service life. （5）The structure of the reduction furnace is adjusted, in order to prolong the remain time of the flue gas and improve pots＇ distribution density, or vertical magnesium reducing furnace is applied. （6）The magnesium slag is cleared out by mechanical equipments and reutilized after the remaining heat energy is recovered.

关 键 词：硅热法炼镁 还原 工艺因素 节能 减排 

分 类 号：TQ174.758[化学工程—陶瓷工业]