高炉炉缸耐火材料抗渣侵蚀性及挂渣性  

Slag erosion resistance and hanging mechanism for the refractory in blast furnace hearth

作　　者：张建良[1] 王志宇[1] 焦克新[1] 王聪[1] 赵永安 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]河南五耐集团实业有限公司技术处,河南巩义451250

出　　处：《钢铁》2015年第11期27-31,80,共6页Iron and Steel

基　　金：联合基金重点资助项目(51134008)

摘　　要：对高炉炉缸用炭砖及刚玉砖的抗渣侵蚀性及挂渣性进行了研究。在1 500℃高温条件下进行试验,探究现场高炉渣对炭砖及刚玉砖的侵蚀机理,通过SEM-EDS及XRD等手段分析侵蚀界面的微观组织结构和物相组成,并提出炭砖及刚玉砖挂渣理论。试验结果表明,高炉渣与刚玉砖在侵蚀界面发生反应,反应生成的镁铝尖晶石及刚玉砖中的Al2O3、Si C等高熔点物质阻碍高炉渣对刚玉砖的进一步侵蚀;高炉渣在炭砖表面未生成高熔点物质,炭砖因与高炉渣黏结点少而导致高炉渣对炭砖黏结强度差,从而形成炭砖表面渣皮周期性脱落。The slag corrosion resistance and the adherent slag performance of carbon-based brick and corundum-based brick were investigated. The slag corrosion mechanisms of carbon-based brick and cortmdum-based brick were studied at 1 500 ~C. The microstructure and the phase composition of the corrosion interface were respectively analyzed by SEM- EDS and XRD. Then the adherent slag mechanisms of carbon-based brick and corundum-based brick were analyzed. The results show that the spinel （MA） can be generated by the reaction between blast furnace slag and corundum-based brick on the corrosion interface. Then the corrosion process is hindered by the generated spinel （MA） and some high melting point phases （A1203, SiC） in corundum-based brick. However, the high melting point phases cannot be formed on carbon- based brick surface. A small number of the points bonding blast furnace slag and carbon-based brick lead to the poor bond- ing strength, and then the slag crust periodically falls off from the carbon-based brick surface.

关 键 词：高炉炉缸 耐火材料 侵蚀 高炉渣 

分 类 号：TF573[冶金工程—钢铁冶金]