转炉冶炼超低碳、超低氮钢的工艺技术  

Metallurgy Technology for Ultra-Low Carbon and Ultra-Low Nitrogen Steel

作　　者：吴杰[1] 刘振清[1] 

机构地区：[1]武汉钢铁(集团)公司技术中心,武汉430080

出　　处：《特殊钢》2005年第4期56-57,共2页Special Steel

摘　　要：分析了武钢90t顶底复吹转炉冶炼<0.005%C,≤0.005%N超低碳、氮钢的两种冶炼工艺技术,即常规工艺:KR脱S→LD→RHKTB→CC和双联工艺:KR脱S→LD脱Si、P→LD复吹脱碳→RHKTB→CC。实践表明,常规工艺冶炼时中间包钢水平均C含量为25.5×10-6、平均N含量为18.5×10-6;双联工艺冶炼时,中间包钢水平均C含量为16×10-6、平均N含量为19×10-6,双联工艺吹炼终点[P](60×10-6)比常规工艺(110×10-6)低。Two kinds of metallurgical process for melting a <0.005%C-≤0.005%N ultra-low carbon and ultra-low nitrogen steel by a 90 t top and bottom combined blown converter a Wuhan Iron and Steel: single slag process KR desulphuration - LD - RH-KTB - CC and two-step steelmaking process KR desulphuration - LD desiliconisation and dephosphorization - LD combined blown decarburation - RH-KTB - CC have been analyzed. The practice results showed that during steelmaking with single slag process the average C content in liquid steel in tundish was 25.5×10^(-6) and the average N content was 18.5×10^(-6) and with two-step process the average C content in liquid steel in tundish was 16×10^(-6), the average N content was 19×10^(-6), and the end [P] with two-step process (60×10^(-6)) was lower that with single slag process (110×10^(-6)).

关 键 词：转炉冶炼 工艺技术 超低碳 RH-KTB 双联工艺 常规工艺 氮 顶底复吹 吹炼终点 中间包 N含量 平均 LD CC 钢水 

分 类 号：TF711[冶金工程—钢铁冶金]