Better material condition and advanced operating technique can avoid excessive accumulation of UPC in BF, overcome the disadvantageous influence,as a result,the higher PCI rate can be got.

• 较好的原料条件和先进的操作技术可避免未燃煤粉在炉内的过量积累,克服其不利影响,从而能够实现煤比的进一步提高。