论文部分内容阅读
根据气相和固相的质量和能量守恒方程,建立竖炉—球团(块矿)法直接还原炼铁的一维数学模型。含铁原料的还原分别采用逐级反应的单界面模型和同步反应的三界面未反应核模型,并考虑了热量损失,得到了各物质的浓度和温度的变化曲线。以美国吉尔摩厂(Gilmore)的Midrex作为对象进行模拟,模型结果与生产数据相符,验证了模型的准确性。比较模拟结果发现,同步反应的三界面未反应核模型更加准确。
According to the mass and energy conservation equations of gas phase and solid phase, a one-dimensional mathematical model of direct reduction ironmaking by shaft furnace-pellet (lump ore) method was established. The iron-containing material was reduced by using a single-stage reaction-step interface model and a three-interface unreacted core model by simultaneous reaction, respectively. Considering the heat loss, the curves of concentration and temperature of each substance were obtained. The model was simulated with the Midrex from Gilmore in the United States. The model results were consistent with the production data, which verified the accuracy of the model. Compared with the simulation results, it is found that the three-interface unreacted nuclear model of the synchronous reaction is more accurate.