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本文的特点是应用了与高炉相似的模型,因而避免了高炉中试验条件很难稳定的困难,取得了较好的结果。文中介绍炉料下降对气流运动的影响。由实验数据可以清楚地看出,炉料下降对气流在料层中分布的影响很小,但却大大地降低气流通过料层的压头捐失(3.5—19%)。压头损失减小的程度取决于料层静止时的阻力。随风量的增加,压头损失减少的绝对值也跟着提高,但减少的百分率不变。改变炉料下降的速度却不影响炉料下降对气流运动影响的关系。文中指出,炉料下降对气流运动影响的主要因素是料层中空隙的体积在炉料下降时得到了增加。
The characteristic of this paper is the application of a model similar to a blast furnace, thus avoiding the difficulty of stabilizing the test conditions in the blast furnace and achieving good results. The article describes the impact of the burden on the air movement. From the experimental data, it is clear that the drop of charge has little effect on the distribution of airflow in the material layer, but greatly reduces the pressure head loss (3.5-19%) of the airflow through the material layer. The extent of the reduction in head loss depends on the resistance of the layer at rest. With the increase of air volume, the absolute value of pressure head loss reduction also increases, but the percentage decrease is unchanged. Changing the rate of charge drop does not affect the relationship of the load drop on the airflow movement. It is pointed out in the paper that the main factor of the influence of the burden falling on the airflow is that the volume of void in the material layer increases when the charge material descends.