The Fundamentals of Micro-Particle Removal by Liquid Oxides

钢中形成的微粒子的性质和数量在炼钢中是至关重要的，它既影响由于堵塞而产生的生产率，也影响所生产的钢的质量。了解和控制如何有效地去除微粒子(夹杂物)对于优化炼钢装置的操作条件和提高最终产品质量至关重要。夹杂物的去除速度以及控制夹杂物从钢液中去除的参数是有限的。本研究计划的主要目的是使用高温共聚焦激光扫描显微镜测定的夹杂物的溶解速率来定量描述从钢液中去除夹杂物。该计划特别关注一系列成分中的含钛夹杂物，这些成分目前没有得到调查，但对钢铁行业至关重要，特别是美国加拿大钢铁公司和安赛乐米塔尔多法斯科钢铁公司。从长远来看，这项工作中建立的实验和模拟技术将被用来理解钢的精炼过程中更广泛的夹杂物去除方法。拟议的研究计划将建立一种合成含钛夹杂物的生产技术，可用于更好地了解和控制保护渣清除含钛夹杂物的实验。这项工作对于开发基于过程化学的建模工具至关重要，该工具将能够可靠地预测钢精炼过程中夹杂物的溶解速度。对夹杂物去除的理解将有助于钢铁制造商在钢包炼钢过程中优化夹杂物控制的工艺参数，以保持在高端钢铁市场的竞争力。拟议的研究为研究生提供高水平的基础研究培训，包括最先进的共焦激光扫描显微镜。通过该项目培训的学生(最初为博士和硕士)将有机会通过麦克马斯特钢铁研究中心与广泛的钢铁公司互动，并在完成学业后获得极好的就业机会。该项目将扩大麦克马斯特大学的研究能力，并为加拿大钢铁行业的经济和环境表现做出贡献。该项目的成果将导致炼钢过程生产率的提高和能源消耗的降低。此外，它还将补充和提高麦克马斯特熔体加工实验室内设备的能力。高附加值的高质量钢材是大多数加拿大钢铁公司具有全球竞争力和保持市场份额的目标。这是保持加拿大钢铁行业盈利能力的重要先决条件，该行业对加拿大经济的价值为140亿美元，直接在加拿大创造25,000个就业机会，并间接支持超过100,000个就业机会。

The nature and quantity of the micro-particles formed in steel is critical in steelmaking, affecting both productivity due to clogging, and quality of the steel produced. Understanding and controlling how the micro-particles (inclusions) can be removed efficiently is crucial to optimizing the operating conditions of steel refining units and improving end product quality. There is a limited knowledge how fast the inclusions can be removed and what parameters are controlling the removability of inclusions from liquid steel.The primary aim of this research program is to use the dissolution rates of inclusions, as determined by high temperature confocal laser scanning microscopy, to quantitatively describe inclusion removal from liquid steel. This program particularly focuses on Ti containing inclusions of a range of compositions that are not currently being investigated, but which are of vital importance to the steel industry, particularly U.S. Steel Canada and ArcelorMittal Dofasco. In the longer term the experimental and modelling techniques established in this work will be employed to understand a broader range of inclusions-removal in the refining of steel. The proposed research program will establish a production technique for synthetic Ti-containing inclusions, which can be used in experiments to better understand and control the removal of Ti-containing inclusions by a protective slag. This work is essential in developing a modeling tool, based on process chemistry that will enable reliable prediction of dissolution rate of inclusions during steel refining. Understanding of inclusion removal developed in this research will assist steelmakers in optimizing their process parameters for inclusion control in ladle steelmaking processes in order to remain competitive in the high value end of the steel market.The proposed research provides excellent level of fundamental research training incorporating a state of the art confocal laser scanning microscope for graduate students. The students to be trained through this project (initially 2PhD and 2Masters) will have the opportunity, through the McMaster Steel Research Centre, to interact with a wide range of steel companies and will have excellent employment opportunities when their studies are finished.This project will extend of the research capabilities at McMaster University and contribute to a consequent improvement in the economic and environmental performance of the Canadian steel industry. The outcomes of this project will lead to improvements in productivity in the steel refining process and decreased energy consumption. Furthermore, it will complement and advance the capabilities of equipment within the McMaster Melt Processing Laboratory. High quality steel in higher added value is the target of most Canadian steel companies to be globally competitive and maintain market share. This is an essential pre-requisite for maintaining the profitability of the Canadian Steel Industry, which is worth $14 billion to the Canadian economy, generates 25,000 jobs in Canada directly and supports over 100,000 jobs indirectly.