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作 者:吴迪 金峰[1] 刘勇[1] 毕传光 WU Di;JIN Feng;LIU Yong;BI Chuan-guang(School of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu.China;Shanghai Meishan Iron and Steel Co.,Ltd.,Baoshan Iron and Steel Group,Nanjing 210016,Jiangsu,China)
机构地区:[1]南京航空航天大学能源与动力工程学院,江苏南京210016 [2]宝山钢铁集团公司上海梅山钢铁股份有限公司,江苏南京210016
出 处:《钢铁》2021年第5期23-30,40,共9页Iron and Steel
摘 要:为了分析实际工况下高炉炉缸内流动与换热特性并对炭砖内侵蚀线进行预测,运用了计算流体力学(CFD)和二维快速反推算法的方法对炉底进行了数值仿真计算。研究结果表明,全尺寸炉底CFD模拟较好地展示了炉底流固区域的温度场和流场特征,测点温度与历史热电偶测温值小于5.2%,吻合效果较好;当炉体内存在气隙时,气隙左右分别形成极热区与极冷区,这与历史数据中热电偶温度骤变的现象吻合,且气隙厚度分别为10、20、30mm时气隙左右温差相对于无气隙分别为原来的14.7、18.9、21.4倍;二维快反计算推演出了"象脚型"侵蚀的形状,最大侵蚀的位置在铁口下方1~3m内,最小残余厚度与实际测值误差为13.5%,这与高炉实际侵蚀情况十分吻合。To analyze the flow and heat transfer characteristics in the hearth of the blast furnace under actual working conditions and predict the erosion line in the carbon bricks,computational fluid dynamics(CFD)and two-dimensional fast backstepping calculation methods are used to simulate the furnace bottom.The research results show that the full-scale furnace bottom CFD simulation better shows the temperature field and flow field characteristics of the furnace bottom fluid-solid zone,and the measured point temperature and the historical thermocouple temperature value are less than 5.2%;when there is an air gap in the furnace body,the air gap The extreme hot zone and the extreme cold zone are formed on the left and right,which is consistent with the phenomenon of the sudden temperature change of the thermocouple in the historical data.When the thickness of the air gap is 10,20 and 30 mm,the temperature difference between the left and right of the air gap is 14.7,18.9,21.4 times respectively compared with no air gap;the two-dimensional fast reverse calculation deduced the shape of"elephant-foot"erosion,the maximum erosion position is within 1-3 mbelow the taphole,and the minimum residual thickness has an error of 13.5%from the actual measured value,it is also consistent with the actual erosion of the blast furnace.
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