高炉炉喉煤气流分布数学模型

应用人工神经网络方法中的误差逆传播模型（ＢＰ）建立了高炉炉喉煤气流分布数学模型。该数学模型在攀钢４高炉ＶＡＸ机上在线运行，能连续推测炉喉煤气流分布，其命中率达到８２％，有效地指导了高炉操作。     

2^#120m^3高炉炉型侵蚀及操作对策

高炉炉役后期炉型侵蚀严重，煤气流难以控制，2^#120m^3高炉应用大批重可有效缓解炉喉刚砖变形、炉型不规则等因素对煤气流分布造成的不利影响，极大地提高高炉的稳定性，保持了高炉强化生产。     

迁钢3号高炉炉喉煤气流分布判断方法探析

为量化炉喉边缘、平台和中心煤气流的分布情况,提出了炉喉煤气指数的参数定义,并分析了迁钢3号高炉的炉喉煤气流分布状态。     

高炉条式炉喉钢砖的设计与应用

高炉的条式炉喉钢砖,下端部变形、开裂并向炉内方向凸出的问题,已为人们所重视.炉喉钢砖凸起后,它所构成的炉喉内型很不规则,直接影响炉料在炉喉的起始分布状态.而起始状态的炉料分布在很大程度上决定着高炉煤气流分布状况.这一点已被日本君津3号高炉所证实.图1示出了该高炉更换了凸向炉内的炉喉钢砖后,炉身至炉腰圆周方向各层的砖衬温度提高并趋向均匀,表明钢砖凸起后,对煤气分布和利用有显著影响. 当合理的炉料分布因炉喉钢砖凸起而遭     

炉喉十字测温在武钢高炉上的应用

在武钢高炉双钟炉顶上实现了炉喉测温，代替了炉喉煤气取样装置，为高炉操作者判断炉况提供了重要参数。     

高炉炉顶摄像仪在韶钢4号高炉上的应用

高炉炉顶摄像仪通过安装在炉喉密封盖上的摄像头,把炉喉内部的工作情况成像并通过工业电视显示在高炉操作者面前,操作者可以清晰直观地看到炉内煤气流分布、料面状况以及炉喉内部各设备的工作状况,实现高炉操作可视化。     

邯钢4号高炉炉身上部及炉喉喷补造衬实践

邯钢4号高炉对炉身上部及炉喉部位进行了遥控喷补造衬，喷补后高炉煤气流分布趋于合理，消除了突然悬料和频繁崩料，炉况稳定、顺行，生产技术指标明显改善。     

无料钟高炉采用倾角跳变与螺旋布料时布料方程的研究

本文根据高炉在冶炼强度提高时,整个高炉纵截面的煤气流分布趋向均匀化的实际情况,对无料钟炉顶布料制度的数学模型进行了研究,较为详细地分析了炉料在炉喉料面上分布与等高度布料之间的机理关系,认为无料钟炉顶采用倾角跳变布料制和螺旋布料制是可以近似实现等高度布料、使煤气流趋向均匀分布的一种重要的手段。本文推导和建立了三种等高度布料时炉料在炉喉料面上落料轨迹的数学模型(倾角跳变布料一种、螺旋布料二种)和有关数据,对开发无料钟炉顶布料技术有一定的指导意义。     

高炉煤气径向分布模型

本文介绍了高炉煤气径向分布在线预报模型。该模型以高炉炉喉部位的物料平衡和热平衡为基础,利用固定于料面上的料面仪测定炉顶温度和煤气温度分布,并且通过Ｋalman过滤器对煤气流分布进行了测定。以通过跟踪芬兰高炉煤气流分布的瞬间动态分布及其突发性主要变化对该模型进行了验证。     

基于参数优化SVR方法预测高炉煤气利用率

高炉煤气利用率是反映高炉能耗的重要指标,其预测控制对炼铁过程的节能降耗具有重要意义.利用某高炉在线采集的数据对煤气流温度分布和高炉煤气利用率的关系进行研究.首先,对高炉煤气利用率数据和能够实时反映煤气流分布的炉喉十字测温数据中的缺失值进行多重插补填充,并利用分位点计算煤气流分布的经验分布函数,得到测温数据的小时分布概率...     

Recognition of Blast Furnace Gas Flow Center Distribution Based on Infrared Image Processing

To address the problems about the difficulty in accurate recognition of distribution features of gas flow center at blast furnace throat and determine the relationship between gas flow center distribution and gas utilization rate,a method for recognizing distribution features of blast furnace gas flow center was proposed based on infrared image processing,and distribution features of blast furnace gas flow center and corresponding gas utilization rates were categorized by using fuzzy C-means clustering and statistical methods.A concept of gas flow center offset was introduced.The results showed that,when the percentage of gas flow center without offset exceeded 85%,the average blast furnace gas utilization rate was as high as 41%;when the percentage of gas flow center without offset exceeded50%,the gas utilization rate was primarily the center gas utilization rate,and exhibited a positive correlation with no center offset degree;when the percentage of gas flow center without offset was below 50% but the sum of the percentage of gas flow center without offset and that of gas flow center with small offset exceeded 86%,the gas utilization rate depended on both the center and the edges,and was primarily the edge gas utilization rate.The method proposed was able to accurately and effectively recognize gas flow center distribution state and the relationship between it and gas utilization rate,providing evidence in favor of on-line blast furnace control.     

邯钢4#高炉炉身上部及炉喉喷补造衬实践

对邯钢首次在4#高炉炉身上部及炉喉进行喷补造衬作了分析，认为喷补造衬后可以使高炉煤气流分布趋于合理，消除突然悬料和频繁崩料的现象，提高高炉的各项技术指标，具有推广价值。     

宝钢高炉炉墙结厚与气液流分布关系的模型研究

通过高炉气体力学模型试验和水电比拟法测定,得到了宝钢高炉炉墙结厚度与气体和炉渣流速之间关系。开发了高炉流场模拟数学模型,并应用该模型从整个高炉的角度探讨了炉墙结厚对气体和炉渣流动的影响;模型研究的结果对炉墙结厚所引起的高炉“上热下凉”现象作出了解释,为制定合理的操作制度,消除结厚,纠正煤气流分布失常提供了理论依据。     

高炉煤气平均停留时间的模拟及讨论

为了探究高炉煤气分布的规律,本研究在考虑料层分布的前提下使用三维高炉数学模型计算了煤气的平均停留时间.结果表明,料层分布对煤气流场影响明显,煤气平均停留时间和鼓风速度存在比较明显的线性关系.特别是对于1 850 m~3的高炉在200 m/s的鼓风速度下,模型求得煤气平均停留时间约为6 s.此外,从几何相似的角度分析了几何模型的选择对模拟煤气平均停留时间的影响,得出了三维几何模型应为模拟煤气平均停留时间最优几何的结论.     

Blast-furnace smelting with the injection of natural gas and coke-oven gas

A multizone mathematical model developed at Nekrasov Institute of Ferrous Metallurgy reveals the internal relations between the processes in a blast furnace. Using this model, the smelting processes and parameters in two different blast furnaces are investigated with wide variation in the flow rates of natural gas and coke-oven gas and in the distribution of the materials over the furnace radius. New scientific and practical findings are reported.     

高炉中心加焦制度下煤气流速度与压力场模拟

不同的布料制度决定炉料的分布状态与不同部位炉料孔隙度的大小,进而影响煤气流在炉内的速度与压力分布,而煤气流的分布直接影响高炉顺行、煤气流利用率与料柱透气性的优劣.为促进煤气流合理分布,进一步探索高炉在中心加焦条件下炉内不同部位的煤气流速与压力变化规律,借助数值模拟方法,建立二维高炉煤气流流动物理模型,基于多孔介质算法并...     

Calculation and Analysis of Liquid Holdup in Lower Blast Furnace by Model Experiments

A hydromechanics experiment on the countercurrent flow of gas and liquid simulating the flow conditions in the lower blast furnace was carried out. A cold model of a packed bed with various packing materials and liquids was used to study the holdup of liquid. Correlations for static holdup, dynamic holdup, and total holdup were obtained. A good agreement was found between the calculated and experimental data. A mathematical model simulating the flow fields was applied to study the effect of liquid holdup in blast furnace. The results of the model calculation show that static holdup is the determinant of the total holdup of molten materials when the blast furnace works in stable condition. The slag phase generally reaches flooding holdup ahead of the hot metal. The radial distribution of gas flow is almost not influenced by the holdup of molten materials, but it has a greater influence on the pressure drop. The size of coke has far greater influence on static holdup than liquid properties does. The study is useful for acquiring a deeper understanding of the complex phenomena in the blast furnace and for determining appropriate operational actions under different production conditions.