基于多场耦合的精炼钢包轻量化耐火材料渣蚀行为研究

项目名称： 基于多场耦合的精炼钢包轻量化耐火材料渣蚀行为研究

项目编号： No.51204126

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 冶金与矿业学科

项目作者： 黄奥

作者单位： 武汉科技大学

项目金额： 25万元

中文摘要： 精炼钢包耐火材料轻量化是耐火材料的重要发展方向之一。其蚀损不但与耐火材料微结构有关，也受到钢水温度、钢渣流动、应力等复杂因素的影响，仅凭现行实验手段难以探明。研究多场耦合作用下精炼钢包轻量化耐火材料的渣蚀行为，对于提高钢的品质，节能降耗都具有十分重要的意义。项目以多孔铝镁系材料为对象，研究多孔骨料的化学矿物组成、孔形、孔径及其分布、外加物如MgO/ZrO2前驱体等对材料的微结构和热导率、多孔介质参数的影响。在此基础上，构建轻量化耐火材料渣蚀过程的温度、流动、化学反应协同作用的多场耦合模型，并进行动态渣蚀热模拟实验验证与优化。采用数值模拟方法，研究基于温度-流动-化学反应多场耦合下的轻量化耐火材料与熔渣界面的能质交换规律，探明不同条件下精炼钢包轻量化耐火材料的渣蚀特性，实现轻量化耐火材料渣蚀过程中相组成及其分布的预测，为设计和开发面向绿色、低能耗冶金的精炼钢包耐火材料提供理论指导。

中文关键词： 多场耦合；精炼钢包；轻量化耐火材料；渣蚀行为；数值模拟

英文摘要： The lightweight refractory for refining ladle has become one of the important development directions. It's hardly to ascertain the slag corrosion of refractory just by the existing experiment methods, which is not only associated with the micro-structure of refractory, but also affected by the complex and stringent conditions, such as temperature, flow, stress, and so on. The study on slag corrosion process under multi-field coupling, which is done by developing and improving the slag corrosion process models of lightweight refractory for refining ladle, plays a significantly important part in quality improvement and energy conservation. The porous alumina-magnesia materials are as objects, The effect of the chemistry and mineral composition of porous aggregate, pore parameters and distribution, additive such as MgO/ZrO2 precursor on the materials microstructure, thermal conductivity and porous medium parameters are studied. And then, the multi-field coupled (temperature, flow, and chemical reaction) model of slag corrosion process for lightweight refractory is established, the experimental verification and optimization of dynamic slag corrosion thermal simulation are implemented. With adopting numerical simulation methods, the research on energy transfer, mass transfer and phase composition and distribution in

英文关键词： Multi-field coupling；refining ladle；lightweight refractory；slag corrosion behavior；mathematical modeling