论文部分内容阅读
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1.2 kg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]的质量分数降低至40×10-6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%。
Slag steel smelting qualified cast ingots can be fully rational use of metal resources, the key issue is to reduce the number of non-metallic inclusions in molten steel. In the EBT + LF + molding process under the conditions of production, refining slag composition, pre-deoxy and argon blowing refining system were tested and analyzed. The results show that CaO-SiO2-Al2O3-MgO slag system with proper alkalinity and slag content is used for slagging, and then pre-deoxidized by adding 1.2 kg of barium aluminum-calcium-calcium per ton of steel and cooperating with different flow rates at different stages of refining After argon blowing treatment for a time, the mass fraction of T [O] in the molten steel can be reduced to less than 40 × 10-6, and the amount of inclusions, especially large particle inclusions (D≥50 ~ 80μm), can be reduced by more than 50% The casting pass rate increased from 85.7% to 100%.