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低品位复杂矿在高炉冶炼过程中对直接还原度有显著影响,主要表现为降低直接还原反应的难度增加。为了开展高炉冶炼低品位复杂矿直接还原度的研究,根据A钢厂生产工艺参数,在普通矿高炉模型基础上建立了低品位复杂矿高炉直接还原度计算模型。对模型参数进行分析得出:直接还原的发展使碳消耗量增加,耗热量随之增加,且耗热量增加也使碳用量增加;当直接还原发展时,间接还原降低,煤气利用率随之降低;在复杂矿中,因为还原复杂元素,还原耗碳增加的同时,直接还原度增加。
The low-grade complex ore has a significant impact on the direct reduction degree in the blast furnace smelting process, mainly as the difficulty of reducing the direct reduction reaction increases. In order to carry out the research on the direct reduction degree of blast furnace smelting low-grade complex ore, according to the production process parameters of A steel mill, the direct reduction calculation model of low-grade complex blast furnace blast furnace was established based on the blast furnace model. The analysis of the model parameters shows that: the development of direct reduction increases the carbon consumption, the heat consumption increases, and the consumption of heat also increases the carbon consumption. When the direct reduction develops, the indirect reduction decreases and the gas utilization rate decreases In complex mines, direct reduction is increased due to the reduction of complex elements and reduction of carbon consumption.