ABSTRACT

There is a growing drive within the steel industry to increase scrap usage in the Blast Furnace (BF)-Basic Oxygen Furnace (BOF) integrated route and extend the scrap-based Electric Arc Furnace (EAF) route for steel production due to the resultant reduced energy costs and CO₂ emissions and the abundant steel scrap supply in the UK. In general, steel scrap may contain high levels of undesirable residual elements, which may have pronounced effects on the casting process of steel production. This article critically reviews current metallurgical understanding about the behaviour of various residual elements, individually and synergistically at high (>1200°C) and low (<1200°C) temperatures during the casting process, with a focus on local enrichment and cracking caused by the residual elements. This review article aims to help the steel community to increase the utilisation of steel scrap for steel production by identifying the current constraints and opportunities.

摘要

钢铁行业越来越多地推动高炉 (BF)-碱性氧气炉 (BOF) 综合路线中的废钢使用量，并扩展以废钢为基础的电弧炉 (EAF) 路线用于钢铁生产能源成本和 CO ₂排放量和英国丰富的废钢供应。一般来说，废钢可能含有高水平的不良残留元素，这可能对钢铁生产的铸造过程产生显着影响。本文批判性地回顾了目前对各种残余元素在铸造过程中在高温 (>1200°C) 和低温 (<1200°C) 下单独和协同作用的行为的冶金学理解，重点是由以下因素引起的局部富集和开裂剩余元素。这篇评论文章旨在通过识别当前的限制和机遇，帮助钢铁界提高废钢在钢铁生产中的利用率。