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首页> 外文期刊>ISIJ international >High-speed Video Recording of Particle Trajectory via Rotating Chute of Nagoya No.3 Blast Furnace and its Comparison with Simulated Behavior Using DEM
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High-speed Video Recording of Particle Trajectory via Rotating Chute of Nagoya No.3 Blast Furnace and its Comparison with Simulated Behavior Using DEM

机译：名古屋3号高炉的旋转溜槽高速记录粒子运动轨迹及其与DEM模拟行为的比较

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摘要

The objective of this paper is to develop a prediction tool for burden distribution of a blast furnace (BF) by using Discrete Element Method (DEM). The high-speed video recording in an actual blast furnace process was tried to capture the particle behavior in Nagoya No.3 BF, and the particle trajectory discharged from a rotating chute was also measured by using a pressure sensitive sheet. The modeling of particle behavior was conducted by DEM, and the simulated behavior was compared with the measured results. The particle discharging behavior was recorded from a large manhole during a shutdown, and an individual particle was able to be seen in the images. It was observed that the particles were pressed up against the chute side wall due to the centrifugal force of chute rotation. The particle discharging velocity was analyzed by Particle Image Velocimetry (PIV). It is found that the velocity of coke particle is larger than that of sinter because of the particle size. This difference affects the particle discharging trajectory, and the one for coke particle is shifted toward the BF wall by comparing to that for sinter. The simulated particle behavior using DEM has a good agreement with the observations, both by the high-speed recording and the trajectory measurement. Therefore, it can be concluded that this particle simulation has high reliability for prediction of the particle trajectory in the actual blast furnace operation.
机译：本文的目的是通过使用离散元方法（DEM）开发高炉负荷分布的预测工具。尝试在实际的高炉过程中进行高速视频记录，以捕获名古屋3号高炉中的颗粒行为，并且还使用压敏片测量了从旋转斜槽排出的颗粒轨迹。通过DEM对粒子行为进行建模，并将模拟行为与测量结果进行比较。在停机期间从一个大的人孔中记录了颗粒的排放行为，并且在图像中可以看到单个颗粒。观察到由于滑槽旋转的离心力，颗粒被压向滑槽侧壁。通过粒子图像测速法（PIV）分析粒子的排出速度。发现由于粒径，焦炭颗粒的速度大于烧结物的速度。这种差异影响了颗粒的排放轨迹，与烧结相比，焦炭颗粒向高炉壁移动。无论是通过高速记录还是通过轨迹测量，使用DEM进行的模拟粒子行为都与观测结果具有良好的一致性。因此，可以得出结论，这种颗粒模拟对于高炉实际操作中的颗粒轨迹预测具有很高的可靠性。

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