LF炉精炼渣对烧成镁钙砖的侵蚀机制研究  

Corrosion mechanism of ladle furnace refining slag to fired MgO-CaO bricks

作　　者：朱伯铨[1] 方斌祥[1] 张文杰[1] 李享成[1] 万洪波[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,湖北武汉430081

出　　处：《耐火材料》2010年第2期81-84,共4页Refractories

摘　　要：采用静态坩埚法研究了LF炉精炼渣对w(CaO)≈34%的烧成镁钙砖的侵蚀作用,并借助扫描电镜、能谱分析和X射线衍射分析了其对镁钙砖的侵蚀机制。研究结果表明:镁钙砖对LF炉精炼渣具有很强的抗侵蚀性能,但几乎不耐渗透;反应层中(Mg.Fe)O富氏体的氧化产生体积膨胀,从而造成镁钙砖开裂;渣中2CaO.Fe2O3(C2F)向砖内的渗透导致其内部液相增加,蚀损加速;2CaO.SiO2(C2S)能在反应界面形成保护层,能在一定程度上阻碍C2F向砖内的渗透。Corrosion effect of ladle furnace（LF）refining slag to fired MgO-CaO bricks with about 34% CaO was studied by static crucible method and corrosion mechanism was analyzed by techniques of scan electron micrograph（SEM）,energy dispersive spectrometer（EDS）and X-ray diffraction（XRD）.The results show that：MgO-CaO bricks exhibit excellent corrosion resistance but poor penetration resistance to refining slag;oxidation of（Mg·Fe）O in reaction layer results in volume expansion forming cracks;penetration of 2CaO·Fe2O3（C2F）from slag to MgO-CaO bricks makes liquid phases increase which accelerates corrosion of the bricks;a protective layer of 2CaO·SiO2 formed on reaction interface prevents penetration of C2F to the bricks.

关 键 词：LF炉 渗透 镁钙砖 显微结构 

分 类 号：TQ175.713[化学工程—硅酸盐工业]