无钟高炉炉料分布预测模型
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摘要
为提高无钟高炉炉喉料面的预测精度,建立了考虑炉料运动的炉料分布数学模型.在分析炉料运动的基础上,指出了炉料运动是影响炉料堆积过程的重要因素,采用尺寸比1∶10的无钟布料器模型试验分析了不同炉料分速度对炉料堆积行为的影响,建立了考虑炉料运动因素的料堆轮廓预测模型,并通过数值方法确定了料堆的位置和料面轮廓曲线,应用于料面形状的预测.结果表明:炉料的运动是造成料堆两侧堆积角差异、料堆横截面面积变化以及料面轮廓改变的重要原因,料堆轮廓采用直线段和曲线相结合的方式进行构造,炉料的堆积角和曲线过渡区域长度作为重要的模型参数均考虑了炉料速度的影响,模型构造的轮廓接近真实料堆形状,应用该模型实现了炉喉料面的准确预测.
In order to improve the accuracy of burden surface prediction in a blast furnace with bell-less top,a mathematical model of burden distribution considering burden motion was established. Based on the analysis of burden motion in the furnace,the burden motion was pointed as an important factor affecting the burden formation,and a 1∶ 10 dimension scale bell-less top distributor model was used to analyze the effect of different burden components' velocity on heap formation. Then a heap formation prediction model considering burden motion was established,the numerical method was employed to determine the heap position and the heap shape,and at last the model was applied to predict the burden surface. Results show that the burden motion is the main reason causing the difference between the heaping angles in both sides of the heap,the variations of area of the heap cross section and heap profile. The heap profile is constructed by lines and curves in the heap formation prediction model,and the important model parameters,including the heaping angles and the length of curved transition area,all take burden motion into account. Thus the profile constructed is close to the actual heap,and the accurate predicted burden surface is achieved after applying this model to burden distribution prediction.
In order to improve the accuracy of burden surface prediction in a blast furnace with bell-less top,a mathematical model of burden distribution considering burden motion was established. Based on the analysis of burden motion in the furnace,the burden motion was pointed as an important factor affecting the burden formation,and a 1∶ 10 dimension scale bell-less top distributor model was used to analyze the effect of different burden components' velocity on heap formation. Then a heap formation prediction model considering burden motion was established,the numerical method was employed to determine the heap position and the heap shape,and at last the model was applied to predict the burden surface. Results show that the burden motion is the main reason causing the difference between the heaping angles in both sides of the heap,the variations of area of the heap cross section and heap profile. The heap profile is constructed by lines and curves in the heap formation prediction model,and the important model parameters,including the heaping angles and the length of curved transition area,all take burden motion into account. Thus the profile constructed is close to the actual heap,and the accurate predicted burden surface is achieved after applying this model to burden distribution prediction.
引文
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[2]Wang P,Jiang Z Y,Zhang X X,et al.Long-term scenario forecast of production routes,energy consumption and emissions for Chinese steel industry.J Univ Sci Technol Beijing,2014,36(12):1683(汪鹏,姜泽毅,张欣欣,等.中国钢铁工业流程结构、能耗和排放长期情景预测.北京科技大学学报,2014,36(12):1683)
[3]Xiang Z Y,Wang X L,Yin H.More discussion on evaluation method for productive efficiency of ironmaking blast furnace.Iron Steel,2013,48(3):86(项钟庸,王筱留,银汉.再论高炉生产效率的评价方法.钢铁,2013,48(3):86)
[4]Xiang Z Y,Wang X L.Blast Furnace Design:Theory and Practice of Ironmaking Process Design.2nd Ed.Beijing:Metallurgical Industry Press,2014(项钟庸,王筱留.高炉设计:炼铁工艺设计理论与实践.2版.北京:冶金工业出版社,2014)
[5]Li C H,An M,Gao Z K,et al.Research and practice of burden distribution in BF.Iron Steel,2006,41(5):6(李传辉,安铭,高征铠,等.高炉无料钟炉顶布料规律探索与实践.钢铁,2006,41(5):6)
[6]Liu Y C.Burden Distribution in Blast Furnace.3rd Ed.Beijing:Metallurgical Industry Press,2005(刘云彩.高炉布料规律.3版.北京:冶金工业出版社,2005)
[7]Mitra T,Saxén H.Simulation of burden distribution and charging in an ironmaking blast furnace.IFAC-Papers On Line,2015,48(17):183
[8]Zhang J,Song X M.Simulation and decision-making system in burden distribution of blast furnace.J Northeast Univ Nat Sci,2015,36(10):1398(张军,宋相满.高炉布料过程仿真与决策系统.东北大学学报(自然科学版),2015,36(10):1398)
[9]Ma F T.Simulation on charge level for BF segregation feeding.Iron Steel,2013,48(8):19(马富涛.高炉偏析布料料面的数值模拟.钢铁,2013,48(8):19)
[10]Radhakrishnan V R,Ram K M.Mathematical model for predictive control of the bell-less top charging system of a blast furnace.J Process Control,2001,11(5):565
[11]Fu D,Chen Y,Zhou C Q.Mathematical modeling of blast furnace burden distribution with non-uniform descending speed.Appl Math Modell,2015,39(23):7554
[12]Jing W B,Jing W.Simulation of charge level for bell-less top blast furnace.Iron Steel,2013,48(2):10(经文波,经薇.高炉无料钟布料料面模拟.钢铁,2013,48(2):10)
[13]Nag S,Gupta A,Paul S,et al.Prediction of heap shape in blast furnace burden distribution.ISIJ Int,2014,54(7):1517
[14]Qiu J Y,Gao Z K,Zhang J L,et al.Simulation of burden trajectory in a bell-less top blast furnace.Chin J Process Eng,2011,11(3):368(邱家用,高征铠,张建良,等.无料钟炉顶高炉中炉料运动流动轨迹的模拟.过程工程学报,2011,11(3):368)
[15]Teng Z J,Cheng S S,Zhao G L.Influence of chute cross section and parameters on burden distribution for blast furnace.Iron Steel,2014,49(9):34(滕召杰,程树森,赵国磊.溜槽截面形状及参数对高炉布料的影响.钢铁,2014,49(9):34)