基于渗流理论的水泥窑过渡带耐火材料微结构设计与调控

项目名称： 基于渗流理论的水泥窑过渡带耐火材料微结构设计与调控

项目编号： No.51202168

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机非金属材料学科

项目作者： 桑绍柏

作者单位： 武汉科技大学

项目金额： 25万元

中文摘要： 大量采用废弃物和生活垃圾作为替代原料或替代燃料是现代水泥工业发展的方向，既节约了能源，又实现了废弃物和生活垃圾的"无害化、资源化、减量化"处理。然而，来自废弃物和生活垃圾中的碱、氯、硫组分在水泥回转窑内循环富集，耐火材料蚀损加速，寿命缩短。针对高温环境中气态碱、氯、硫侵蚀问题，本项目拟研究气态碱、氯、硫组分在耐火材料中的渗流行为，建立合适的多孔介质渗流模型，揭示材料中显气孔率、孔径尺寸与分布、孔弯曲程度、孔连通度等孔结构参数与碱、氯、硫组分渗流速率之间的相关性，指明材料结构优化的方向；设计材料组分，研究耐火材料在制备和使用过程中的组成与微结构变化规律，探明材料气孔中晶须或板片状晶生长机理及相应的物理化学条件，形成耐火材料组成设计原则与微结构调控技术，为开发高性能、长寿命水泥窑耐火材料提供理论指导。同时，本项目研究对于解决高炉、热风炉、全氧燃烧玻璃窑用耐火材料高温气相侵蚀问题具有借鉴意义。

中文关键词： 耐火材料；气相侵蚀；微结构；孔；渗流

英文摘要： It is one of development directions for modern cement industry to adopt a large number of waste and living garbage as an alternative raw materials or fuel, which benefit to saving the energy, reducing the risks of waste and living garbage and make them to "resources". However, alkali, chloride and sulfur components from waste and living waste are circulated and enriched in cement rotary kiln, the erosion of refractories accelerate, and their service lives are shorten. Acoording to the gaseous alkali, chlorine and sulfur erosion in high temperature environment, the seepage flow behavior of gaseous alkali, chlorine and sulfur components in refractories are investigated, appropriate porous medium flow models will be established, and the correlation between gaseous alkali, chlorine and sulfur components seepage rate and the pore strcture, such as porosity, pore diameter, pore size and distribution, pore curve degree, hole connectivity and so on, will be revealed, and the optimization direction of material microstructure will be pointed out. The material compositions will be designed and optimized, the change of composition and microstructure of these refractories in the process of preparation and service will be investigated, whisker or plate flake crystal materials growth mechanism and corresponding physical and ch

英文关键词： refractory；gas phase corrosion；microstructure；pore；seepage