水钢LF精炼渣及造渣制度规划

Planning of LF refining slag and slagging regime in Shuicheng Steel

精炼渣具有脱硫和净化钢液的作用，在炉外精炼渣中采用精炼渣精炼钢水已成为洁净铜生产重要的技术手段。论文根据钢种的质量要求，以脱硫和铜中夹杂物控制为目标，结合水铜主要生产品种，对LF精炼渣终渣成分和造渣制度进行了规划。在水钢目前生产工艺条件下，焊条焊丝钢精炼终渣成分控制CaO／SiO2=2．0～2．5，Al2O3=10％～15％；含铝冷镦钢CaO／Al2O3=1．6—1．8，SiO2〈8％；高碳硬线铜CaO／SiO2=2．5～3．5，Al2O3〈15％。精炼渣造渣制度均可采用转炉出钢渣洗，并在LF精炼炉补加渣料的方式进行。

Desulfurization and purifying the molten steel are the main function of refining slag, and refining steel by refining slag in secondary steelmaking processes has been the significant technical method for clean steel production. Consideration of the main kinds of products in Shui Steel, aiming at the desulfurization and inclusion control in steel, the composition of final slag and slagging regime for LF refining are programmed in this article based on the requirements of steel quality. For the current production process in Shui Steel,the optimum composition of the end slag for LF refining is CaO/SiO2=2.2-2.5, Al2O3=10-15% for electrode wire steel, CaO/Al2O3=1.6-1.8,SiO2〈8% for aluminum killed cold heading steel and CaO/ SiO2=2.5-3.5, Al2O3〈15% for high carbon steel wire. Slag infiltration and adding slag in LF refining can be adopted for refining slagging regime.