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薄板坯连铸连轧产线保护浇注工艺实践
Practice of Protective Casting Process for Thin Slab Continuous Casting and Rolling Production Line
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- DOI:
- 作者:
- 石鑫越，李 阳
SHI Xinyue, LI Yang
- 作者单位:
- 首钢京唐钢铁联合有限责任公司 钢轧作业部，河北 唐山 063200
Shougang Jingtang Iron and Steel United Co., Ltd., Tangshan 063200, China
- 关键词:
- 连铸；保护浇注；质量
continuous casting; protective casting; quality
- 摘要:
- 钢液浇注过程中极易出现二次氧化导致钢中氮、氧含量的增加，恶化钢液质量。 通过对钢轧作业部 MCCR
薄板坯连铸机连铸保护浇注工艺研究，分析钢包自开率、大包套管、中包流场等因素对保护浇注的影响，提出了相应的
保护浇注措施。 结果表明，采用保护浇注技术，可以减轻钢液的氧化程度、吸氧量、吸氮量，提高钢液质量，铝损、铝比合格率均在 98%以上。
Secondary oxidation was easy to occur in the pouring process of molten steel, which leaded to the increase of nitrogen and oxygen content in steel and deteriorates the quality of molten steel. Based on the research on casting process of MCCR thin slab caster in steel rolling department, the influences of self-opening rate of ladle, big ladle casing, flow field of middle ladle and other factors on casting process of MCCR thin slab caster were analyzed, and corresponding protective casting measures were proposed. The results show that the application of protective pouring technology can reduce the degree of oxidation, oxygen absorption and nitrogen absorption of liquid steel, improve the quality of liquid steel, and the qualified rate of aluminum loss and aluminum ratio is above 98%.