碳化钙真空还原镁热力学分析及试验  

Study on vacuum thermal reduction of Mg by calcium carbide

作　　者：彭建平[1] 冯乃祥[1] 陈世栋[1] 武小雷[1] 王紫千[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《真空》2009年第3期15-17,共3页Vacuum

基　　金：国家科技支撑计划项目(2006BAE04B07-4)

摘　　要：本文通过对碳化钙还原MgO的化学反应热力学研究,计算得到:在常压下该反应的临界反应温度为2148K;在真空条件时还原反应临界温度降低,当压力降低至1kPa时,临界反应温度为1395K。通过还原炼镁试验表明:随着反应温度升高,镁还原率提高;当在1150℃左右和1～2Pa真空条件下,可以获得80%以上的镁还原率。Based on thermodynamic analysis, the Gibbs free energy and critical temperature in the MgO deoxidized reaction by CaC2 were calculated. It was found that the critical reaction temperature under normal pressure is 2148K, and it becomes 1395K if the system pressure is lkPa. Experimental results showed that the rate of reduction of Mg from calcined dolomite increases with increasing reaction temparature, and it comes up to over 80% at about 1150℃ in 1-2Pa low vacuum.

关 键 词：镁冶金 真空热还原 热力学分析 碳化钙 

分 类 号：TF822[冶金工程—有色金属冶金] TB713[一般工业技术—真空技术]