摘要
为了分析蓄热式钢包烘烤装置的加热均匀性,在连续性方程、动量方程和能量方程基础上,建立了多入口、多出口的非稳态钢包烘烤数学模型。采用k-ε模型和修正的速度-压力耦合算法SIM PLEC,针对耦合流体流动、燃烧和换热过程,对不同气体预热温度下钢包内衬温度分布进行数值研究,并进行实验验证,数值计算结果与实验及工程现象基本吻合。研究结果表明,采用高温空气燃烧技术的蓄热式钢包烘烤器,能够有效提高钢包的烘烤速度和加热均匀性;气体预热温度越高,高温低氧燃烧特性越明显,包衬终点温度越高,温度均匀性也越好。
In order to study temperature uniformity of ladle lining baked by regenerative ladle heating system,a transient mathematical model for a 160t ladle heating facility with multiple inlets and outlets has been established based on continuity,momentum and energy equations.On use of the k-ε model and SIMPLEC,and in the light of the procedure of coupling fluid flow and combustion with heat transfer,the temperature distribution of ladle lining preheated by combustion of different gases is studied numerically,and verified through experiments.The results of numerical calculation are basically in line with experimental results.The study results indicate that the heating rate of ladle can be increased and the temperature uniformity of lining can be improved when using the regenerative ladle heater in which the high-temperature air combustion technology is adopted.
关键词
高温空气燃烧
钢包烘烤
温度分布
非稳态
数值计算
High-temperature air combustion
Ladle heating
Temperature distribution
Transient state
Numerical simulation
