电磁场对形成MgO-C质耐火材料MgO致密层的影响  

Effect of Electromagnetic Field on Forming Dense MgO Layer in MgO-C Refractories

作　　者：李享成[1] 王堂玺[1] 姜晓[1] 徐平[1] 朱伯铨[1] 

机构地区：[1]武汉科技大学,耐火材料与高温陶瓷国家重点实验室培育基地,武汉430081

出　　处：《硅酸盐学报》2011年第11期1752-1756,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50904048)资助项目

摘　　要：采用碳含量为6%(质量分数)的MgO–C质耐火材料和CaO与SiO2质量比为0.87的钢渣,分别在中频感应炉和电阻炉中氩气气氛下进行抗渣侵蚀实验,利用X射线衍射仪、扫描电子显微镜和能谱仪对抗渣样品渣线界面层进行分析。结果表明:在电磁场环境中,MgO–C质耐火材料界面层没有发生Mg(g)氧化反应,因此未形成MgO致密层;在无电磁场环境中,MgO–C质耐火材料界面处形成了明显的MgO致密层。对MgO致密层形成机理的分析表明:电磁场提高了MgO的溶解速率和Mg(g)排出动力,抑制了MgO致密层的形成。Using MgO–C refractories with carbon of 6%（in mass） and a slag with a mass ratio of CaO to SiO2 of 0.87,the melting slag resistance experiments of MgO–C refractories were carried out in Ar under the condition of an induction furnace and a resistance furnace,respectively.The slag line layers of MgO–C refractories corroded by the slag under the different conditions were analyzed by X-ray diffractometer,scanning electron microscope and energy dispersive spectrometer.The results show that in the induction furnace with an electromagnetic field（EMF）,there exists no MgO dense layer in the interface because Mg（g） is not oxidized.However,the MgO dense layer could be formed in the interface without any EMF.The formation mechanism of MgO dense layer indicated that the EMF could enhance the solution of MgO and power of Mg（g） discharge.As a result,EMF restrained the formation of MgO dense layer

关 键 词：电磁场 氧化镁-碳 致密层 耐火材料 

分 类 号：TQ175.13[化学工程—硅酸盐工业]