摘要
采用计算流体力学(CFD)方法,建立了宝钢1号高炉(1BF)的多相流冶炼过程模型,对高炉内部多相物质的流动、质量转递和热传递行为同时进行模拟。该模型开发了具有层状结构的软熔带模型,能够细致呈现炉内软熔带形状和位置。倒V字形软熔带决定炉内煤气流二次分布,其状态受到高炉入炉焦比显著影响;不同焦比条件下软熔带状态变化规律较为合理。模型计算得到的气相和固相温度分布结果与1BF典型工况特征一致;炉喉处气相、固相的温度差接近100 K,在炉内高温区间的气固相最高温差达到493 K;煤气流分布模拟结果反映了宝钢开放中心、兼顾边缘的高炉操作特点。模型可根据高炉布料制度来调整径向O/C比和粒径分布,研究布料制度对软熔带影响,为高炉操作制度优化和高炉"黑匣子"炉内冶炼可视化提供了一种有效的手段。
A multi-fluid metallurgical process model of Baosteel No.1 blast furnace(1BF)was built with CFD technology.The flow,mass transfer and heat transfer of multiphase material in blast furnace were simulated simultaneously.A fine cohesive zone with layered structure was included in this model.The logical profile and position of cohesive zone were presented.Reversed V_shape CZ prompted secondary distribution of gas flow.It varied according to coke ratio correspondingly and presented a reasonable change under different coke ratios.Calculated temperature distribution of gas and solid accorded with the typical 1BF operating characteristics.The temperature difference of gas phase and solid phase at the furnace throat is nearly 100 K,and the maximum temperature difference in the high temperature region is 493 K.The simulation result of gas flow distribution reflected the operating characteristics with a opened center region and taken care of the edges region at 1BF.Radial O/C ratio and particles size distribution can be adjusted according to production parameters in this model.It provided an effective method to optimize operation system and visualize blast furnace process viewed as a strange“black box”.
作者
李云涛
宋文刚
毛晓明
LI Yuntao;SONG Wen’gang;MAO Xiaoming(Research Institute,Baoshan Iron & Steel Co. ,Ltd. , Shanghai 201900, China;Ironmaking Plant,Baoshan Iron & Steel Co. ,Ltd. , Shanghai 200941, China)
出处
《宝钢技术》
CAS
2018年第5期54-59,共6页
Baosteel Technology
关键词
高炉
CFD
多流体模型
数值模拟
软熔带
blast furnace
CFD
multi-fluid model
numerical simulation
cohesive zone
