材料期刊网

用渣钢铁冶炼生产合格铸钢锭可以充分合理应用金属资源。其关键问题是降低钢水中的非金属夹杂物数量。在用EBT+LF+模铸工艺的生产条件下，对精炼渣成分、预脱氧和吹氩精炼制度进行了试验和分析。结果表明：应用合适碱度和渣量的CaO-SiO2－Al2O3－MgO渣系造渣，然后在每吨钢中加入1.2kg硅铝钙钡进行预脱氧，并在精炼的不同阶段配合不同流量和时间的吹氩处理后，可使钢水中T[O]含量降低至40ppm以下，夹杂物特别是大颗粒夹杂物（D≥50~80μm）数量减少50%以上，使钢锭的铸造合格率从85.7%提高到100%。

Qualified cast ingot of large transect, produced by steel and iron with slag, can be used to make solid waste are fully utilized. The key issue was to reduce the amount of Non-metallic inclusions in molten steel. It was carried on the experiment and the analysis for the system of the refining slag ingredient、pre-deaeration and blowing the Argon fining craft by adopting EBT+LF+Die Casting craft. The result indicated that applying CaO-Al2O3-SiO2-MgO slag with appropriate alkalinity and dregs quantity to slagging and then pre-deaerating by the alloy of SiAlBaCa(addition:1.2kg/t steel), blowing the Argon in different period of fining craft with different flow and time. After treatment, T[0] content in steel has been reduced below 40ppm, the amount of inclusions in steel, especially large granular inclusions(D≥50~80μm) decreased more than 50%. The steel ingot casting qualified rate from 85.7% enhanced to 100%.