摘要
在热力学分析的基础上,研究了碳热还原氮化硼铁矿过程中MgO的还原挥发过程。结果表明,试样的总失重率随着温度的升高而增大,1 440～1 470℃时很快达到最大值,最大失重率为52.88%。MgO以镁蒸气的形式挥发而造成失重,试样中MgO最大失重率达到98.138%。挥发过程中又被重新氧化,并和硼、硅的挥发物一起在炉管口形成白色粉末附着在炉管壁上,证明碳热还原氮化硼铁矿过程中MgO有挥发现象。
Based on analysis of thermodynamics, it is researched the reduction and volatilization of MgO in the carbothermic reduction and nitriding process of ferroboron ore. It is showed that the total weight loss rate of sample gets larger along with rising of temperature, and reaches rapidly the largest value of 52.88% with- in 1 440 to 1 470 ℃. The loss is because of volatilization of MgO as manganese vapor, and the largest loss rate of MgO in sample gets 98. 138%. In volatilization manganese is oxidized again and, together with vola- tile of boron and silicon, forms white powder at pipe mouth and adheres on furnace pipe wall. All this proves in carbothermic reduction and nitriding process of ferroboron ore there is volatilization of MgO.
出处
《河北冶金》
2013年第2期19-22,共4页
Hebei Metallurgy
关键词
硼铁矿
碳热还原氮化
MGO
热力学分析
ferroboron ore
carbothermic reduction and nitriding
MgO
thermodynamics analysis
