含铝钢LF精炼渣成分优化及造渣制度改进  

COMPOSITION OPTIMIZATION OF LF REFINING SLAG OF ALUMINIUM-BEARING STEEL AND IMPROVEMENT OF SLAG-MAKING SYSTEM

作　　者：国富兴 张迪凡[2] 韩春良 翁玉娟 吴雨晨 王金星 

机构地区：[1]河北钢铁集团承钢公司提钒炼钢一厂,河北承德067102 [2]太原理工大学,山西太原030024

出　　处：《河北冶金》2011年第10期36-38,共3页Hebei Metallurgy

摘　　要：针对含铝钢初炼钢水[C]低、[O]高的特点,提出采用CaO-Al2O3-CaF2系精炼渣,组分中CaO/Al2O3=1.7～1.9;出钢过程采用渣洗工艺向钢包加入大部分精炼渣,将连铸返回的热态精炼渣倒入精炼钢包中,缩短精炼成渣时间,保证足够的白渣和软吹时间。冶炼20Mn2A时,脱S率达到77.13%,铸坯T[O]为21×10-6,铸坯中[Als]为0.026%,达到了良好的冶金效果。Against to the feature of preliminary-smelted aluminium-bearing steel： low content of carbon and high oxygen,it is proposed to adopt slag system of CaO-Al2O3-CaF2 including CaO/Al2O3 as 1.7～1.9,adopt slag-washing process in tapping to add most part of refining slag into ladle,pour hot refining slag returning from continuous casting into refining ladle to reduce refining slag-forming time and guarantee enough white slag and soft-blowing time.The good metallurgical result gets： when smelting 20Mn2A desulfurization ratio reaches to 77.13%,oxygen content in casting billet 21×10^-6,aluminum 0.026%.

关 键 词：LF精炼 含铝钢 渣洗工艺 钢渣循环 

分 类 号：TF769.9[冶金工程—钢铁冶金]