低碱度转炉渣对镁质耐火材料的侵蚀行为  

Corrosion Behavior of Low-basicity Converter Slag on Magnesia Refractory

作　　者：夏云进[1] 马伟杰[1] 李杰[1] 郭鑫[1] 李孝攀[1] XIAYunjin;MA Weijie;LI Jie;GUO Xin;LI Xiaopan(School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan 243032, China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243032

出　　处：《安徽工业大学学报（自然科学版）》2016年第4期303-308,共6页Journal of Anhui University of Technology（Natural Science）

基　　金：国家自然科学基金项目(51304002);国家自然科学基金委员会-宝钢集团有限公司钢铁联合研究基金项目(U1560109);安徽省教育厅重点项目(KJ2013A057)

摘　　要：采用静态坩埚法研究低碱度转炉渣对镁质耐火材料的侵蚀行为,使用扫描电镜(SEM)、能谱分析(EDS)等对侵蚀区域和炉渣的微观结构进行表征、分析。结果表明:高碱度终渣对镁质坩埚的侵蚀行为主要是炉渣渗透造成的固液界面处材料结构性剥落;低碱度脱磷渣主要通过对坩埚孔隙进行侵蚀溶解,造成坩埚界面颗粒化并融入渣中;当渣中w(Fe_2O_3)≥20%时,坩埚界面生成低熔点富FeO固溶体,加速坩埚熔蚀;碱度和MgO含量的提高有助于缓解脱磷渣对坩埚的侵蚀程度。Corrosion behavior of low-basicity converter slag on magnesia refractory was investigated with static crucible method.Erosion area and microstructure of slag were characterized and analyzed with scanning electron microscope(SEM)and energy dispersive spectrometer(EDS).The results show that the corrosion behavior of magnesia crucible by high-basicity slag is primarily structural spalling caused by the penetration of slag at the solid-liquid interface.The corrosion behavior of magnesia crucible by low-basicity converter slag is caused by erosion and dissolution through the crack of crucible,which causes the crucible particles at the interface.When w(Fe2O3)320%in slag,low melting point solid solution with high FeO forms at the interface,which intensifies the erosion.The increase of basicity and the content of MgO can relieve the corrosion of crucible by converter slag.

关 键 词：低碱度转炉渣 镁质耐火材料 侵蚀 

分 类 号：TQ175.1[化学工程—硅酸盐工业]