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为分析氧气高炉条件对炼铁系统还原过程的影响,建立高炉气固换热-化学反应耦合数学模型,对高炉软熔带以上区域进行分区,获得氧气高炉和传统高炉不同区域的升温制度和气氛变化规律;通过球团矿还原行为试验,结果表明:相比传统高炉条件,氧气高炉条件下球团矿还原性有大幅度提高,边缘区域更为明显;由于还原势的提高以及H2的增加,氧气高炉条件下炉料还原速率比传统高炉更快,生成金属铁的量更多,有利于改善炉料的软熔行为。研究为氧气高炉工业化应用提供理论基础。
In order to analyze the influence of oxygen blast furnace conditions on the reduction process of ironmaking system, a mathematic model of gas-solid heat-chemical reaction coupling in blast furnace was set up to partition the area above the blast furnace soft melting zone and obtain the temperature rising system and atmosphere in different regions of oxygen blast furnace and traditional blast furnace The results show that the reduction of pellet in oxygen blast furnace greatly increases compared with that in the traditional blast furnace and the edge region is more obvious than that of the traditional blast furnace. Due to the increase of the reduction potential and the increase of H2, Under the condition of oxygen blast furnace, the charge reduction rate is faster than that of the traditional blast furnace, and the amount of metal iron is more, which is beneficial to improve the reflow behavior of the charge. The research provides a theoretical basis for the industrial application of oxygen blast furnace.