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根据氧气高炉冶炼过程对于炉料的升温和反应特性,研究出一次数模,并由此得到以下计算结果:(1)随着鼓风中氧浓度的增加而热流比增大,炉内温度降低和还原减慢。当热流比在0.9以上时有必要吹预热煤气;(2)实现低直接还原度、低燃料比的预热煤气量和温度的适当范围,与煤气量相一致的热流比为0.74～0.90,温度为600～1200℃;(3)虽然预热煤气成分影响小,但是,为确保炉顶以下的传热容量范围,预热煤气吹入的位置应在炉身上部;(4)由风口前的理论燃烧温度能控制在风口水平面处的固体温度,以及在低燃料比的情况下也可控制预热煤气量和温度;(5)操作燃料比的范围很宽,从500kg/t(吹入预热煤气)到1200kg/t(不吹入预热煤气)。
According to the heating and reaction characteristics of the oxygen blast furnace for the charge, a mathematical model was developed and the following results were obtained: (1) With the increase of the oxygen concentration in the blast furnace, the heat / Slow down. It is necessary to blow the preheated gas when the heat flux ratio is above 0.9; (2) to achieve the proper range of preheated gas volume and temperature with low direct reduction and low fuel ratio, the heat flux ratio consistent with the gas volume is 0.74 to 0.90, Temperature is 600-1200 ℃; (3) Although the influence of preheated gas composition is small, in order to ensure the heat transfer capacity range below the roof, the location of the preheated gas blowing should be in the upper part of the shaft; (4) Of the theoretical combustion temperature controls the solids temperature at the tuyere level and also controls the amount and temperature of the preheated gas at low fuel ratios; (5) The operating fuel ratio ranges widely from 500 kg / t Preheat the gas) to 1200kg / t (without blowing warm gas).