Higher combustibility and coal injection rate can be acquired in BF by using the coal with lower metamorphic degree and higher content of active matter.
喷吹低变质度、高活性组份含量的煤可以获得较高的燃烧率和较大的喷煤量。
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。
To further increase PCI rate, such works as using quality coal, reforming coal injection system, improving the condition of BF operation will be done.
提出了进一步提高煤比所要做的工作，如优选煤种、改造煤粉喷吹系统、改善高炉生产条件等。
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