共查询到18条相似文献,搜索用时 452 毫秒
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通过分析机械探尺和雷达探尺在高炉料位检测上的优缺点,采用模糊GK聚类算法,对雷达探尺测量数据进行聚类处理,并把聚类获得的参数用于构建一个RBF网络。利用机械探尺数据训练已建立的RBF网络,建立了基于机械探尺数据的修正模型,通过修正模型对雷达探尺测量数据的逐一修正,实现雷达探尺和机械探尺测量数据的有机融合。仿真结果和工业数据证明,基于机械探尺数据建立的修正模型具有较高的精度和较好的实用价值。 相似文献
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转炉炉料配比优化的模型研究 总被引:1,自引:0,他引:1
通过对转炉炉料的冶金作用的分析,运用炼钢学原理,建立了炉料配比的线性规划模型,合理提出转炉炼钢各种金属炉料的最佳配比,为降低转炉炉料成本、提高炼钢生产的经济效益提供理论依据. 相似文献
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不采用传统接触力模型自下而上的高炉料面形状计算方法,而是根据土坡力学颗粒物质堆积理论,提出了新的基于堆积法的高炉料线形状融合计算方法,直接对料面形状进行计算.围绕高炉多环布料的炉料堆积特点,结合炉顶六点阵列雷达,获得了料面形状计算的边界条件,弥补了传统料型计算靠十字测温加机械探尺的经验估算.新方法通过高炉布料规律及炉料颗粒的物理堆积插值方法,采用贝叶斯数据融合方法和分段三次Hermite插值,结合布料体积约束条件,完成了理论计算与测量修正的结合.实测结果表明:料面形状融合法比传统单独的料面估算法,测量精度提高4.8%,料面分辨率提高27.2%,使布料控制可以更加精准和有针对性. 相似文献
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含铁炉料冶金性能和高炉炉料结构优化是实现低碳低成本炼铁的重要举措。熔滴试验对于全面把握含铁炉料的冶金性能具有重要意义。由于钢铁企业内各高炉炉料结构不同且不断调整,加上熔滴试验成本较高且检测时间较长,多数企业仅检测单种含铁炉料的熔滴性能,操作者难以根据炉料结构的变化预知综合炉料的冶金性能、进而调整冶炼制度。在对永钢高炉常用单种含铁炉料进行熔滴试验的基础上,根据永钢典型炉料结构,研究不同炉料结构条件下综合炉料的熔滴性能。同时,利用回归法建立了单种炉料配比及熔滴性能与综合炉料熔滴性能间的关系模型,模型具有一定适用性,可为高炉炉料结构优化及提前制定合理的操作制度提供参考。 相似文献
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In order to investigate the effect of particle size on burden distribution and bed permeability, the calculated model of bell- less top system with two parallel hoppers used in a 4070m3 blast furnace was established. The motion of burden particles with different particle size distribution??PSD) included 25-40, 40-60 and 60-80mm from bunker to throat was calculated by discrete element method. The results show that the volume of burden can fluctuate in the range of ??10% according to the circumferential area with different particle sizes. As the particle size increases, the tip position of the stock surface is closer to the circle along the circular distribution. The permeability of border is larger than that of the center of stock surface due to the wall effect, which is easy for gas overdevelop in border. With the decreases in particle size, the influence of wall effect is also weakened and the disparity in the voidage between border and center is reduced. Based on the calculated results obtained in this study, the permeability index of border is 1. 4, 2. 1, 2. 5 times larger than that of the center for the 25-40, 40-60, 60-80mm PSD. If the big particles are distributed near the wall, it is easy for gas overdevelop in border, then will have bad influence on blast furnace. Thus, keeping the radial distribution of particle size in burden surface is very important for bed permeability of burden layer. 相似文献
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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. 相似文献
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《钢铁研究学报(英文版)》2016,(8):765-771
Mathematical models for burden descending process have been applied to obtain whole burden structures in blast furnace,whereas the accuracy of those burden descent models has not been sufficiently investigated.Special evaluation method based on timeline burden profiles was established to quantitatively evaluate the error between ex-perimental and modeled burden structures.Four existing burden descent models were utilized to describe the burden structure of a 1/20 scaled warm blast furnace.Input modeling conditions including initial burden profile,descending volumes in each time interval,and normalized descending velocity distribution were determined via special image pro-cessing technology.Modeled burden structures were evaluated combined with the published experimental data.It is found that all the models caught the main profile of the burden structure.Furthermore,the improved nonuniform de-scent model (Model IV)shows the highest level of precision especially when burden descends with unstable velocity distribution tendency.Meanwhile,the traditional nonuniform descent model (Model III)may also be desirable to model the burden descending process when the burden descending velocity presents a linear tendency.Finally,the uni-form descent model (Model I)might be the first option for roughly predicting burden structure. 相似文献
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针对无料钟炉顶炉料分布检测难的现状,解析炉料的布料机理,结合生产数据和专家经验,开发大型高炉布料数学模型,并在此基础上开发仿真模型,实现了料面形状和矿焦比分布的界面化,指导高炉操作者优化布料制度。系统运行表明,模型可以有效地预测布料矩阵形成的料面形状和矿焦比分布,从而为优化高炉布料操作提供技术支撑,保障高炉稳定顺行。 相似文献
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分析了铁尾矿配比对矿渣成分设计参数的影响规律,采用高温熔体物性综合测定仪测定熔渣黏度、流动性等高温物化性能.采用主成分分析法和多元线性回归原理,建立了主成分与熔渣流动性的数学模型.研究结果表明:调质高炉渣的成分设计参数更符合制取矿渣棉原料的要求;随着铁尾矿配比增加,熔渣黏度有升高的趋势,但高温区黏度较小、流动性较好,适宜的成纤温度区间变宽,调质高炉熔渣黏度、流动性更适合用于制备矿渣纤维;调质高炉熔渣适宜的酸度系数为1.2~1.4,即铁尾矿适宜的质量分数为5%~15%. 相似文献