摘要
为解决硼镁矿在高炉冶炼过程中 ,因镁循环富集而产生结瘤的问题 ,研究了碳粉还原MgO的动力学·采用恒温热重法 ,在高纯氩气氛下 ,测定了MgO +C在不同温度下的失重·用Doyle Ozawa法和Kissinger法 ,解析实验所获得的Δm -t热重曲线数据 ,计算出反应的表观活化能为 2 9 0 4 6kJ/mol,表观频率因子为 0 0 6 1·
The ludwigite containing MgO to 14%～25%, in which the content of MgO is much higher than in common iron ore, is a unique iron ore in China. MgO can be reduced by carbon or CO to be transformed into magnesium vapor at the high temperatures. The gaseous magnesium can be reoxidized when it flows upwards, which is a great hidden trouble in the process in blast furnace. Weight loss of the system of MgO+C at different temperatures were examined by thermogravimetry in the atmosphere of highly pure argon. The experimental results were interpreted by Doyle Ozawa and Kissinger methods. It is shown that the apparent activation energy of the reaction of MgO+C is 29 04?kJ/mol and the apparent frequency factor is 0 061.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第5期444-446,共3页
Journal of Northeastern University(Natural Science)
基金
辽宁省自然科学基金资助项目 (0 0 2 0 5 4) .
