Physical Chemistry Aspects of Liquid Metal Alloys, Molten Oxides and Waste Materials

液态金属合金、熔融氧化物和废料的物理化学方面

• 批准号: RGPIN-2020-05960
• 负责人: McLean, Alexander
• 金额: $ 2.84万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=758262
• 关键词: Physical; Chemistry; Aspects; Liquid; Metal

This research program has been designed with the following objectives in mind: 1) Development of fundamental knowledge that pertains to the processing of liquid metal alloys and the behaviour of oxide melts related to the recovery of useful products from waste materials; and 2) Research on thematic topics that will provide students with both fundamental knowledge and hands-on training experience in high temperature experimental techniques and materials characterization procedures that will fit them well for professional careers within academia, government laboratories and the industrial sector. In recent years, studies have been conducted within the applicant's laboratory to investigate the kinetics of decarburization of levitated stainless steel droplets with CO2-Ar gas mixtures. It was found that mass transfer correlations, although widely employed, do not describe the data obtained from droplet experiments. This was not understood before. Based on these findings, studies will be carried out to examine the influence of different temperature gradients within a reactive gas phase on experimentally determined kinetic parameters associated with different alloy systems. In this context, droplet experiments will be performed to examine the potential for simultaneously removing the impurities carbon and sulphur from levitated droplets of blast furnace hot metal composition with gas mixtures that contain CO2. Desulphurization experiments will also be conducted at lower temperatures where the iron solvent is replaced with copper or nickel. Results from these experiments together with numerical modelling will permit new mass transfer correlations to be established for characterization of refining reactions associated with levitated droplets exposed to reactive gas mixtures over an extended temperature range. In addition to refining reactions involving gas-metal interactions, steelmaking processes are based on control of slag chemistry, which in turn has a profound influence on slag performance and hence on steel quality. Recent studies by the applicant have included investigation of red mud, a waste material produced in the process of alumina extraction from bauxite, as a potential source of slag additives for the steel industry. The innovative production of refining fluxes for the steel industry from waste products generated by the aluminum industry has important environmental and also economic implications. During the proposed research, the feasibility of recovering iron from red mud by a novel mechanically activated reduction method will be evaluated and for the first time, the potential for generating mold fluxes from the residual waste material will be investigated. In addition, the possibility of a correlation between a measurable parameter of the molten oxide (e.g. electrical conductivity) and refining capacities will be explored in order to provide the basis for an online control system for production processes.

该研究计划的设计考虑了以下目标：1）与液态金属合金的加工以及与从废料中回收有用产品有关的氧化物融化的基本知识的发展； 2）研究主题的研究，这些主题将为学生提供高温实验技术和材料表征程序的基本知识和动手培训经验，这些程序适合于学术界，政府实验室和工业部门的职业职业。 近年来，在申请人的实验室内进行了研究，以研究带有CO2-AR气体混合物的悬浮不锈钢液滴脱氧化的动力学。发现质量转移相关性虽然广泛使用，但并未描述从液滴实验中获得的数据。这是以前没有理解的。基于这些发现，将进行研究，以检查反应性气相中不同温度梯度对与不同合金系统相关的实验确定动力学参数的影响。在这种情况下，将进行液滴实验，以检查同时从悬浮的碳和硫的杂质碳和硫的潜力，并用含有二氧化碳的气体混合物的悬浮液滴液滴。脱硫实验也将在较低的温度下用铜或镍代替。这些实验以及数值建模的结果将允许建立新的传质相关性，以表征与在扩展温度范围内暴露于反应性气体混合物的悬浮液滴相关的精炼反应。除了涉及气 - 金属相互作用的改进反应外，钢制过程还基于对炉渣化学的控制，进而对炉渣性能产生了深远的影响，因此对钢质质量产生了深远的影响。申请人的最新研究包括研究红泥，这是一种从铝土矿提取过程中产生的废料，是钢铁行业的矿渣添加剂的潜在来源。由铝业产生的废物生产的钢铁行业的创新生产具有重要的环境和经济影响。在拟议的研究中，将评估通过一种新型的机械活化还原方法从红泥中回收铁的可行性，并首次研究了从残留废料中产生模具通量的潜力。此外，将探索熔融氧化物的可测量参数（例如电导率）和精炼能力之间的相关性，以便为生产过程的在线控制系统提供基础。