材料期刊网

从高炉下部气体动力学条件出发，建立了反映高炉重要操作参数和最大产量之间对应关系的产量优化模型。模型计算结果表明，炉腹和死料堆焦炭的平均粒度增加5 mm，产量约提高20%；渣比下降100 kg/t，产量约提高8%；炉渣粘度下降01 Pa·s，产量约提高4%；炉顶压力增加50 kPa，产量约提高6%；富氧增加1%或提高风温100 ℃，产量约提高2%。如果维持合适的理论燃烧温度不变，高煤比时提高富氧率对产量提高的作用比煤比小时更大。结合合理的上部调剂手段，提高未燃煤粉在炉内的利用率，在大喷煤比下将大型高炉的利用系数提高到30 t/(m3·d)的水平是完全可能的。

An optimizing productivity model was developed based on the aerodynamics condition in the lower zone of a blast furnace. The model reflects the connection between some important operational factors and maximum productivity. The calculated results show the mean size of coke in active and deadman zone increases by 5mm, then productivity increases by about 20%; the slag ratio decreases by 100 kg/t, then productivity increases by about 8%; the slag viscosity decreases by 01 Pa·s, then productivity increases by about 4%; the top pressure increases by 50 kPa, then productivity increases by about 6%; oxygen enrichment increases by 1% or blast temperature increases by 100 ℃, then productivity increases by about 2%. If the suitable and constant theoretical combustion temperature is maintained, the increase of oxygen enrichment factor for high PCI is more beneficial for increasing productivity compared with lower PCI. With proper operational means in the upper zone of a blast furnace, if the utilization efficiency of unburnt pulverized coal in a blast furnace is improved, it is entirely possible to increase the productivity to 30 t/(m3·d) when a large amount of pulverized coal is injected into a largescale blast furnace.