优化55 t LD-60t LF-CC 工艺提高钢的洁净度

特殊钢 ›› 2006, Vol. 27 ›› Issue (1): 48-50.

优化55 t LD-60t LF-CC 工艺提高钢的洁净度

曹立国^1，2, 魏雪晴², 丁秀中¹, 赵宏²

1石家庄钢铁有限责任公司，石家庄050031;
2北京科技大学，北京100083

收稿日期:2005-08-12 出版日期:2006-02-01 发布日期:2006-02-01
作者简介:曹立国(1968-),男，硕士，北京科技大学在读博士生，从事炼钢工艺研究与管理

Optimization of 55t LD-60t LF-CC Process to Upgrade Cleanliness of Steel

Cao Liguo^1,2,Wei Xueqing²,Ding Xiuzhong¹,Zhao Hong²

1 Shijiazhuang Iron and Steel Co Ltd, Shijiazhuang 050031;
2 University of Science and Technology,Beijing 100083

Received:2005-08-12 Published:2006-02-01 Online:2006-02-01

摘要/Abstract

摘要： 控制LD(氧气顶吹转炉)吹炼终点C-低碳钢0.08%～0.10%C、中碳钢0.10%～0.15%C、高碳钢 ≥0.20%C;通过LD 出钢时强化预脱氧，控制出渣钢下渣率达98%,控制LF精炼Als为0.020%～0.035%,保证精炼渣中(FeO)≤0.5%,喂CaSi线，50~80 L/min软吹氩时间≥7min以及全程保护浇注；中间包采用高效保温吸渣剂及稳定连铸操作等工艺措施，使石钢55t转炉-60tLF 冶炼流程在不进行真空处理的工艺条件下，连铸坯中氧含量控制在20×10-6以下

Abstract: The oxygen content in concasting billet has been controlled less than 20×10-⁶ in condition of non-vacuum treatment with 55 t LD-60 t LF melting flow sheet at Shijiazhuang Iron and Steel by the operation measures such as controlling LD blowing end-point carbon:low carbon steel 0.08%～0. 10%C;medium carbon steel 0. 10%～0. 15%C and high carbon steel ≥0.20% C,strengthening pre-deoxidation at steel tapping of LD,controlling slag tapping rate up to 98%, controlling Als 0.020%～0.035% during LF refining,to ensure refining(FeO)≤0.5%,feeding CaSi wire,50~80 L/ min soft blowing argon time ≥7 min,protective casting in whole process,using high efficiency holding and absorbing slag agent,and constant casting operation

Key words: LD-LF-CC,Clean Steel,Pre-Deoxidation, Protective Casting

曹立国, 魏雪晴, 丁秀中, 赵宏 . 优化55 t LD-60t LF-CC 工艺提高钢的洁净度[J]. 特殊钢, 2006, 27(1): 48-50.

Cao Liguo, Wei Xueqing, Ding Xiuzhong, Zhao Hong. Optimization of 55t LD-60t LF-CC Process to Upgrade Cleanliness of Steel[J]. Special Steel, 2006, 27(1): 48-50.