高炉软熔带内浮氏体还原-成渣反应非稳态竞争行为的机理研究

项目名称： 高炉软熔带内浮氏体还原-成渣反应非稳态竞争行为的机理研究

项目编号： No.51304257

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 徐健

作者单位： 重庆大学

项目金额： 25万元

中文摘要： 高炉软熔带与炉内气流分布和煤气利用密切相关，继而直接影响炉况的顺行与燃料的消耗，研究软熔带的形成机理以获得其合理的形态结构对于高炉操作至关重要。现有的工作重在通过测试含铁炉料的软熔性能，获取表征物理形态变化的温度、压差来评价软熔带的形状及透气性，忽略了内部发生的化学反应，特别是浮氏体还原-成渣反应及其相互间的竞争行为对其形成规律的影响。本项目首先研究浮氏体还原-成渣反应的物理化学基础，并采用非稳态条件下的数值计算来耦合不同反应间的相互作用关系；其次，通过时间历程的纵向切割与实验条件的横向变换，对比研究浮氏体单一与竞争反应条件下所存在的非线性叠加差异，揭示还原-成渣反应间的竞争机理，并结合过程宏/微观特征来凝练关键性的表征参数；最后，深入研究浮氏体内/外不同因素对其竞争行为的影响规律，通过关系模型的构建，进一步明晰含铁炉料的软熔机理，从而为实现高炉的优化生产提供理论指导与技术支持。

中文关键词： 软熔带；浮氏体；还原-成渣反应；非稳态；竞争行为

英文摘要： The cohesive zone of blast furnace has a great influence on the smooth operation and fuel consumption, for it determines the gas flow distribution and utilization. It is of great importance to obtain the reasonable structure of the cohesive zone for blast furnace operation by studying its formation mechanism. The previous work is centered on the evaluation of the shape and permeability of the cohesive zone by measuring the physical indices of the softening and melting process of iron-bearing materials, such as temperature and pressure drop. However, the role of the chemical reactions during the process, especially the influences of the reducing and slagging reactions participated by wustite and the competition relation between each other are ignored in most of the previous research. Given that, the proposed project firstly determines the interaction between the reducing and slagging reactions participated by wustite under the unsteady state by numerical calculation after a systematic study of the fundamental physical chemistry of the reactions. Then, a comparison is made between the individual and competition reactions of wustite at particular intervals and under different experimental conditions so as to find out the key parameters combining with the macro/micro-characteristics of the process. At last, the infl

英文关键词： cohesive zone；wustite；reducing-slagging reactions；unsteady state；competition behavior