Increasing the Use of Scrap Steel - Challenges and Opportunities

大幅增加废钢在钢铁生产中的使用，已成为英国钢铁行业的一项战略决定。这是由政府制定的2050年前工业二氧化碳排放量减少80%的强制性目标推动的，也是受当前废钢供应过剩以及到2020年废钢数量预计将增长的推动。因此，增加未来炼钢作业中废钢使用量的策略吸引了大量的研究兴趣，特别是在最近几年，包括英国学术界和英国钢铁行业目前的重大工作，也是围绕可持续性、净零和材料循环的讨论的关键部分。这不仅对以废钢为基础的电弧炉钢铁制造商，而且对综合钢铁制造商来说都很重要，他们对增加用于炼铁的高炉(BF)工艺和用于炼钢的碱性氧气工艺(BOF)中的废钢使用量感兴趣。此外，许多综合钢铁制造商已经在探索未来向更多以废钢为基础的炼钢业务过渡的要求。因此，需要了解一些限制和挑战，并解决与增加废钢使用量相关的一些问题，这在未来几年对该行业将变得更加关键。该项目将补充现有的废料项目组合，并将使用实验技术和生命周期思维方法处理这一问题。本项目的主要目标是1.更多地了解现有废料流的化学性质和物理形式，以及这如何影响SCRAPP的熔化行为、热传递和充电性2。需要在物理形式、质量和化学方面对这些废钢流进行哪些改变，才能在转炉和BF3中增加废钢的使用。与综合炼钢路线相比，这些变化可能会如何影响电炉炼钢路线的产品设计，以及就炼钢工艺的开发而言，设计钢铁产品将需要什么，以使其在寿命结束时更容易重新使用、回收和再循环。4.对在碱性氧气和高炉炼铁作业中增加使用废钢的情况进行环境评估

Significantly increasing the use of steel scrap in steel production has become a strategic decision for the UK steel industry. This is driven by the government compulsory target of reducing CO2 emissions by 80% before 2050 for industry and is motivated by the current over-supply of steel scrap and its projected growth in quantity into the 2020's. Therefore strategies to increase the amount of scrap steel used in future steelmaking operations have attracted a good deal of research interest particularly in recent years, including significant current work within UK academia and the UK steel industry and are a key part of the discussions around sustainability, net zero and materials circularity. This is a topic that is important not only to scrap based electric arc furnace based steelmakers, but also to integrated steelmakers, who are interested in increasing the use of scrap steel in both the blast furnace (BF) process used to make iron, and the basic oxygen process (BOF) used to make steel. In addition, many integrated steel makers are already exploring the requirements for the transition to more scrap based steelmaking operations in the future.Therefore the need to understand some of the limitations and challenges, and solve some of the problems associated with the increased use of scrap will become even more crucial to the industry in the years ahead. This project would complement the current portfolio of existing scrap projects and will approach the problem using both experimental techniques and life cycle thinking methodology. The principal aims of this project are 1. To understand more about the chemical nature and physical form of existing scrap streams, and how that affects the melting behaviour, heat transfer and chargeability of the scrap2. What changes would be required to these scrap streams in terms of physical form, quality and chemistry to allow for increased use of scrap within both the BOF and BF3. How these changes might affect product design for an electric steelmaking route compared with an integrated route and what would be required for the design of steel products to make the re-use, recovery and recycling of them at end of life much easier in terms of exploitation in the steelmaking processes. 4. To carry out an environmental assessment of scenarios involving the increased use of scrap in both basic oxygen and blast furnace ironmaking operations