高炉风口风量分配数学模型

建立了高炉风口风量分配数学模型,并提出风口流阻的计算公式.在总风量不变的条件下,计算了某5 500 m3高炉风口长度或者风口面积调整时,各风口风量、风速和鼓风动能的变化.结果表明增加风口长度或减小风口面积都将导致对应风口流阻增加.增加部分风口的长度,已调整的风口的风量、风速和鼓风动能降低.缩小部分风口面积,已调整的风口的风量降低;当缩小多个风口面积时,已调整的风口的风速、鼓风动能才能提高,并提出了其临界风口个数的计算公式.根据该数学模型,有利于掌握风口鼓风参数的变化规律,定量化调整风口的相关参数,维持高炉的稳定和顺行.

Mathematical Model of Adjusting Blast Volume of Blast Furnace Tuyeres

A mathematical model of adjusting blast parameters of tuyere was built and the formula of tuyere flow resistance was proposed. Based on a domestic 5500m³ BF， the blast volume， velocity and kinetic energy of each tuyere were analyzed， respectively， when the lengths or areas of tuyeres were adjusted at the condition of constant total blast volume. The results showed that the flow resistance of adjusted tuyeres increases with increasing their lengths and decreasing their areas. Therefore， increasing the length of adjusted tuyeres can decrease their blast volume， velocity and kinetic energy. The blast volume of adjusted tuyeres can be also reduced by decreasing their areas. The blast velocity and kinetic energy of adjusted tuyeres can be enhanced when the areas of multiple tuyeres were decreased. What’s more， the formula of critical adjusted tuyere number is put forward. This model can help to master the variation regulations of blast parameters and adjust the parameters of tuyeres quantitatively， which is benefit for stable and smooth work.