提出了全氧混合喷吹煤粉和富氢燃气高炉炼铁新工艺，并通过理论分析结合实验证明新工艺的可行性。理论计算证明，在新工艺条件下，理论燃烧温度控制在1 800~1 850 ℃时可同时满足高炉上下部热平衡；实验结果证明，在焦炭气化反应激烈开始温度前，铁矿石金属化率可达95%，焦炭在高炉内参与直接还原而气化程度很低，吨铁焦比可降到190 kg。煤气氮含量低于07%，有利于CO2回收，可实现CO2零排放。煤气热值达到8 200 kJ/m3。这种煤气不仅适合钢铁联合企业和传统燃气用户使用，也可直接用于高效的电热冷三联产系统，间接实现了燃煤高效洁净化利用。
A new ironmaking process for blast furnace which is characterized by pure oxygen blast and multiinjection with pulverized coal and H2enrich gas is put forwarded. The theoretical calculation shows that the mass and energy balances both at top and bottom of furnace could be satisfied if the theoretical combustion temperature is controlled within the range of 1 800-1 850 ℃. The results show that about 95% of the iron ore can be reduced before the active carbon gasification reactions occur. Coke takes part in the direct reduction at low gasification rate. In this situation the coke rate is reduced to 190 kg/THM and N2 content in the emitted gas can be lower than 07%. Therefore, the′s technique is beneficial for reusing the top gas and realizing the zero emission of CO2. Heat value of gas reaches 8 500 kJ/m3 which is a valuable resource not only suitable for conventional gas users but also for high efficiency CCHP system.
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