摘要
本文以计算流体力学为基础,基于Eulerian-Eulerian方法预测了高炉回旋区的形状,同时结合煤粉和周围焦炭的化学反应对回旋区的尺寸进行了修正,获得了稳定可靠的回旋区三维信息,并以此为基础研究了高炉煤粉的喷吹过程。结果表明:回旋区是一个长度约为1.2 m椭球形空腔,喷吹的煤粉颗粒随热风在其内部回旋燃烧,而燃烧产物又与回旋区周围的焦炭反应生成还原性气体H2和CO。利用虚拟现实技术,将回旋区的三维形状、煤气流的分布等信息进行了直观的呈现,有助于技术人员和操作人员高效理解复杂物理过程,并提升对高炉炼铁生产过程的认知度和把握度。
A three-dimensional raceway shape in the lower part of blast furnace is predicted based on computational fluid dynamics and Eulerian-Eulerian approach. Then, the shape and size of raceway is modified by taking account of the influence of combustion effects of pulverized coal and coke. Based on the reliable raceway shape, the characteristics of pulverized coal injection and combustion are obtained. The result shows that the raceway is an ellipsoidal cavity with a length of 1.2 m, and the injected coal particles circulate and combust in the raceway together with hot blast. The combustion products react with cokes surrounding the raceway and generate reduction gases of H2 and CO. Finally, the virtual reality technology is applied to display the detailed information of raceway shape and multi-physic fields, which are expected to be useful for understanding the fundamental behaviors in the lower part of a blast furnace and then to optimize operations in the future.
出处
《金属材料与冶金工程》
CAS
2016年第5期23-29,共7页
Metal Materials and Metallurgy Engineering
基金
国家自然科学基金资助项目(61321003)
湖南省科技计划国际合作项目(2015WK3005)
关键词
高炉
回旋区
数值模拟
可视化
blast furnace
raceway
numerical simulation
visualization
