铝碳材料与稀土钢夹杂物的反应  

Reaction of alumina-carbon composites with inclusions in rare earth steel

作　　者：唐碧辉[1] 徐彬[2] 刘国齐[1] 

机构地区：[1]中钢集团洛阳耐火材料研究院 [2]河北师范大学化学与材料科学学院

出　　处：《耐火材料》2006年第3期197-199,共3页Refractories

摘　　要：炼钢时添加稀土是提高钢材品质的有效途径,但在浇铸过程中浸入式水口容易发生堵塞。通过SEM、EDAX、XRD分析浇铸稀土钢后铝碳质浸入式水口的显微结构以及附着物的相组成,发现附着物以稀土铝酸盐和钙黄长石为主。低熔点液相的形成以及Ca2+与刚玉的反应对附着的发生起促进作用,并对附着发生的机理进行了分析。Although adding rare earth in steel is a useful approach to improve the quality of steel ingots,the clogging of Al2O3 -C submerged entry nozzle （SEN） easily happens during casting process. The microstructure of used SEN and phase of the adhesions were analyzed by SEM, EDAX and XRD respectively. It was found that the main phases of the adhesion are REAlO3 and calcium melilite. The formation of low melting point phases and the reaction of Ca^2＋ with corundum were both positive to the adhesion： Besides,the adhering mechanism was also analyzed.

关 键 词：铝碳材料 浸入式水口 附着 稀土 

分 类 号：TQ175.714[化学工程—硅酸盐工业] TG142.13[一般工业技术—材料科学与工程]