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以重钢5号高炉实际尺寸和操作参数为基础,假设回旋区内的流动为气固两相流动,且气相流动为粘性不可压缩流动,根据相似理论建立了高炉回旋区三维冷态实验模型,分析了回旋区形成机理的影响因素。结果表明:鼓风量、料层属性、料层高度以及风口直径对回旋区大小和形状均有影响。随着鼓风量的增大,回旋区深度和高度均不同程度的增加,当风量过大时,回旋区炉料上浮,椭球形的回旋区形状不再存在。回旋区高度随料层高度的逐渐增加而减小。风口直径对回旋区穿透深度的影响较其对高度的影响明显。
Based on the actual size and operating parameters of No.5 BF, assuming that the flow in the raceway is a gas-solid two-phase flow and the gas-phase flow is viscous incompressible flow, a three-dimensional cold model of the blast furnace zone is established based on the similarity theory. The influencing factors of the formation mechanism of the raceway are analyzed. The results show that blast volume, material properties, material height and tuyere diameter have an impact on the size and shape of the convolution zone. With the increase of blast volume, the depth and height of the convolution zone increased in varying degrees. When the air volume was too large, the charge of the convolution zone floated up, and the shape of ellipsoid raceway no longer existed. The height of the convolution decreases with the height of the gob. The influence of tuyere diameter on the penetration depth of the cyclotron is more significant than that of the height.