【摘要】 高炉富氧大喷煤时，必须考虑煤气中的氢元素、煤的预热及挥发分的分解热。作者对不喷煤时高炉操作线的计算和绘制方法进行修正，推导出富氧大喷煤时高炉操作线的计算公式。应用该公式可预测富氧大喷煤条件下高炉内煤气成分、煤气量、热量分布和化学反应等的变化，以便控制这些变化带来的影响，保证高炉顺行。更多还原

【Abstract】 When blast furnace (BF) operates under oxygen enrichment and high PCI rate, H 2, coal preheating and decomposition heat of coal volatile should be taken into account. Calculation and plotting methods of BF operation line without coal injection are modified, and calculation formulae of BF operation line with oxygen enrichment and high PCI rate are deduced. Applying the formulae, the changes of gas constituent, gas volume, heat distribution and chemical reaction etc in BF with oxygen enrichment and high PCI rate can be forecasted, so the influence resulted from these changes can be controlled and normal BF operation can be ensured.更多还原