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.
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。
The increase of high blast temperature is an effective measure to enhance pulverized coal injection rate, reduce energy consumption, and cost.
高风温是高炉提高喷煤比、降低工序能耗、降低成本的有效措施。
The coal rate is being increased in recent years owing to the high economics of coal powder injection.
由于高炉喷煤有着显著的经济效益，故近年来煤比正在不断提高。
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