ABSTRACT

Recycling ladle furnace (LF) slag helps in sustainable steel making and reduces steel production costs. This paper focuses on recycling Si/Mn/Al-killed LF slag as a replacement for CaO–Al₂O₃-based synthetic slag for treating high carbon Si/Mn-killed steels. Characterization of different types of LF slag was carried out to identify chemical composition and mineralogical phases. Industrial trials were carried out by recycling LF slag along with lime and calcined bauxite as additives. The effect of recycled LF slag on the kinetics of desulphurization and other process parameters was studied and compared with regular practice. It was observed that LF slag can be recycled successfully as a replacement for CaO–Al₂O₃-based synthetic slag at an industrial scale.

摘要

回收钢包炉 (LF) 炉渣有助于可持续炼钢并降低钢铁生产成本。本文重点研究回收 Si/Mn/Al 镇静 LF 渣，以替代 CaO-Al ₂ O ₃基合成渣处理高碳 Si/Mn 镇静钢。对不同类型的 LF 炉渣进行了表征，以确定化学成分和矿物相。通过回收 LF 炉渣以及作为添加剂的石灰和煅烧铝土矿进行了工业试验。研究了再生 LF 渣对脱硫动力学和其他工艺参数的影响，并与常规实践进行了比较。据观察，LF渣可以成功地回收作为CaO-Al ₂ O _{3的替代品}工业规模的合成渣。