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对增加高炉喷煤比所引起的技术问题进行了研究。通过中心装焦和可调炉喉装置以维持稳定的中心气流，使高Ｏ／Ｃ比下的炉料分布得到控制。在软熔带呈倒Ｖ形的情况下，未燃烧煤粉都堆积在软熔带下部。由于未燃烧煤粉堆积，结果使高炉中心气流增强。同焦炭相比，未燃烧煤粉优先与ＣＯ＿２气体反应。未燃烧煤的灰分主要与熔融炉渣反应。在鼓风含氧量２３％、燃烧率为７５％的情况下。不发生被未燃烧煤粉堵塞的最大喷煤比估计为２５０ｋｇ／ｔ─ｐ。炉顶温度随着喷煤比的增加而升高，但富氧率每增加１％，炉顶温度的上升可减少８．３℃．
The technical problems caused by increasing coal injection ratio of blast furnace were studied. Central charge and adjustable throat devices are used to maintain a steady central gas flow and control the charge distribution at high O / C ratios. In the case of an inverted V-shaped ribbon, unburned pulverized coal accumulates in the lower part of the ribbon. As a result of the unburned pulverized coal, the result is an increase in blast furnace center airflow. Compared with coke, unburned pulverized coal preferentially reacts with CO 2 gas. The ash of unburned coal mainly reacts with the molten slag. Blast in the oxygen content of 23%, the combustion rate of 75% of the circumstances. The maximum coal injection rate that does not occur that is clogged with unburned pulverized coal is estimated to be 250 kg / t-p. The temperature of the top of the furnace increased with the increase of coal injection rate, but for every 1% increase of the oxygen enrichment rate, the temperature of the top of the furnace decreased by 8.3 ℃.