Comprehensive kinetic and modelling study of basic oxygen steelmaking

碱性氧气炼钢(BOS)工艺相对成熟，在定性方面也得到了较好的理解。然而，优化操作在很大程度上是基于过程数据的统计模型，虽然在日常操作中是有效的，但通常将控制限制在已知的操作窗口。这样的模型没有解决几个公开的问题，关于详细的反应机理和来自碱性氧气炉(BOF)内不同反应部位的贡献。**该项目的总体目标是开发一个在碱性氧气炉(BOF)中精炼碳、硫和磷的综合模型，基于我们对该工艺所有关键方面的基本机械知识。这项研究结束了申请者几年来在熔渣-金属乳化液精炼速度方面的相关发展，并将与加拿大和全球钢铁行业合作伙伴合作完成。这项研究将结合对高温动力学的详细实验研究，这将回答有关转炉(BOF)中液滴行为的基本科学问题，并将结合整体建模方法，使用工业试验的数据进行完善并最终验证。通过整体熔池精炼与单独熔滴精炼的比较，以及特定位置的反应与可能发生在多个位置的反应的比较，将确定熔滴和所谓的热点的相对贡献。所有这些信息将与工厂采样的结渣数据相结合，以开发转炉的综合模型。*加拿大目前每年生产约1300万吨钢，其中一半以上是在五艘转炉船上生产的。目前的建议将从吨钢成本、产量和能源效率方面提高转炉炼钢的效率。加拿大生产商的直接参与和结果的更广泛应用将为加拿大钢铁制造商提供成本和质量优势。

The Basic Oxygen Steelmaking (BOS) process is relatively mature and well understood in qualitative terms. However, optimizing operations has been based largely on a statistical models of process data and, although efficient in day to day operation generally limit control to known operating windows. Such models do not address several open questions regarding the detailed reaction mechanisms and the contributions from different reaction sites inside the Basic Oxygen Furnace (BOF). **The overall objective of this project is to develop a comprehensive model of carbon, sulphur and phosphorus refining in a Basic Oxygen Furnace (BOF), based on our fundamental mechanistic knowledge of all critical aspects of the process. The research caps several years of related developments by the applicants concerning refining rates in slag-metal emulsions, and will be done in collaboration with Canadian and global steel industry partners. The research will combine detailed experimental studies of high temperature kinetics, which will answer fundamental scientific questions about the behaviour of droplets in the (BOF), with a holistic modeling approach which will be refined and ultimately validated using data from industrial trials. By comparison of overall steel bath refining with that due to droplets alone, as well as comparison of reactions which are site specific with those which may occur at multiple sites, the relative contributions of droplets and the so called "hot spot" will be determined. All of this information will be combined with slag formation data from plant sampling, to develop a comprehensive model of the BOF. **Canada currently produces approximately 13 million tonnes of steel per year with over half produced in five BOF vessels. The current proposal will improve the efficiency of BOF steelmaking in terms of cost, yield and energy efficiency per tonne of steel. The direct participation of a Canadian producer and availability of the results for application more widely will afford Canadian steelmakers cost and quality advantages.**