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Evaluation of Burden Descent Model for Burden Distribution in Blast Furnace

机译:高炉炉料分布的炉料下降模型评估

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摘要

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.
机译:为了降低高炉的整体炉料结构,已经采用了炉料下降过程的数学模型,但尚未充分研究这些炉料下降模型的准确性。建立了基于时间线炉料曲线的特殊评估方法,定量评估了炉前炉料之间的误差。利用四个现有的负荷下降模型来描述一个1/20比例热风炉的负荷结构。确定了输入建模条件,包括初始负荷分布,每个时间间隔的下降量以及归一化的下降速度分布通过特殊的图像处理技术,结合已发布的实验数据对建模的重载结构进行了评估,发现所有模型都抓住了重载结构的主要特征。此外,改进的非均匀除臭模型(模型IV)显示了最高的精度,尤其是当负担下降时同时,当负荷下降速度呈线性趋势时,可能还需要传统的非均匀下降模型(模型III)来模拟负荷下降过程。最后,均匀下降模型(模型I)可能是理想的。粗略预测负担结构的第一个选择。

著录项

  • 来源
    《钢铁研究学报(英文版)》 |2016年第8期|765-771|共7页
  • 作者单位

    School of Energy Science and Engineering,Central South University,Changsha 410083,Hunan,China;

    School of Energy Science and Engineering,Central South University,Changsha 410083,Hunan,China;

    School of Energy Science and Engineering,Central South University,Changsha 410083,Hunan,China;

    School of Energy Science and Engineering,Central South University,Changsha 410083,Hunan,China;

    Center for Innovation through Visualization and Simulation,Purdue University Calumet,Hammond 46323,Indiana,USA;

    School of Energy Science and Engineering,Central South University,Changsha 410083,Hunan,China;

  • 收录信息 中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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  • 入库时间 2024-01-27 06:54:54
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