颗粒在高炉内的运动包括溜槽内运动及空区运动。炉料在空区的运动过程由溜槽末端的速度决定。因此,正确描述颗粒在溜槽内的运动对高炉精准布料十分重要。描述溜槽内颗粒运动的数学模型已有不少,但已有的数学模型是描述颗粒在溜槽内沿直线运动的一维模型。通过对实际高炉布料过程料流轨迹的监测发现,颗粒在溜槽内的运动并非一维运动,而是三维运动。笔者通过对颗粒在溜槽内的受力分析,建立颗粒运动的三维数学模型,准确计算炉料颗粒的落点,分析空区的料流宽度,分析溜槽长度,溜槽转速以及溜槽倾动距对颗粒三维运动的影响。计算结果与实测数据相吻合。
The movement of particles included such two processes as on the chute and in the free zone,and burden trajectory in the free zone was decided by the velocity at the chute tip.So it was very important to accurately describe the movement in the chute for exactly control of burden distribution.There were some mathematical models about the movement of particles,but most of mathematical models were on the basic of one-dimensional.Through monitoring of the burden trajectory on actual blast furnace,it was found that the movement of the particle wasn＇t a line but a 3-D model.Through analyzing the force focus on a particle,a 3-D mathematical model was set up to calculate the impact point,to analyze the width of burden flow and research the effect of chute length,rotating velocity and titled holding on 3-D movement.It is found that the calculated result coincides well with the measured result.
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