合理调整风口对大型高炉吹透中心、活跃炉缸十分重要。目前，实际操作常常认为增加风口长度、增加风口回旋区深度、缩小风口面积能提高风速，进而提高鼓风动能，以利于吹透中心。建立了调整风口参数的数学模型，并以某厂3200 m3高炉为例，给出了在总风量不变的条件下，增加1个风口长度、减小1个风口面积以及多个风口尺寸调整时，各风口风量、风速和鼓风动能的变化。发现增加部分风口的长度时，对应风口风量、风速、鼓风动能降低。缩小少数风口的面积，会降低对应风口的风量；只有在缩小多数风口的面积时，已调整的风口风速和鼓风动能才可能提高，而未调整的风口风量、风速和鼓风动能提高幅度更大。根据该数学模型，定量化给出该高炉调整风口的相关参数，可用于调整炉缸煤气流的均匀性，维持高炉稳定、顺行。
The reasonable adjustment of tuyeres is benefit for blowing through center and activity of large BF hearth. At present,some views of actual operation were proposed that depth of raceway was increased by increasing the length of tuyere. And also blast velocity and kinetic energy could be increased by decreasing the area of tuyere. A mathematical model of adjusting tuyere parameter was established. Based on a domestic BF with volume of 3 200 m3,the blast volume, velocity and kinetic energy of each tuyere were analyzed by adjusting one tuyere’s length and area and multiple tuyeres’ size at the condition of constant total blast volume. It was found that blast volume,velocity and kinetic energy of the ad-justed tuyeres would be decreased by increasing their lengths. The blast volume of the tuyeres would be reduced by de-creasing their areas. The blast velocity and kinetic energy of the adjusted tuyeres could be enhanced with decreasing more tuyeres’areas. However,the blast parameters of unadjusted tuyeres would be improved even more. The parameters of ad-justing tuyere for this BF were given quantitatively according to this model,which could be utilized to control uniformity of hearth gas flow and maintain BF stable and smooth.
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