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本文在A.Rist和J.G.Peacey等人理论的基础上,根据高炉下部区反应模式图,在考虑炉身工作效率的情况下推导了完整地计算焦比和炉顶煤气成分的数学模型。模型中同时包括富氧、加湿、喷煤、喷油、喷吹天然气和金属化炉料等操作条件的计算。应用此模型计算了22因素对我国七大高炉焦比的影响,同时还计算了各种操作条件下的焦比、风量、炉顶煤气成分、煤气利用率、直接还原度以及绘制Rist操作线的主要参数,取得了满意的效果。本模型也可用于预测改变操作条件后每吨生铁的焦炭和鼓风需要量以及炉顶煤气成分。
Based on the theory of A.Rist and J.G. Peacey et al., The mathematical model of complete calculation of coke ratio and top gas composition is deduced according to the reaction pattern in the lower part of the blast furnace, taking into account the working efficiency of the blast furnace. The model also includes the calculation of operating conditions such as oxygen enrichment, humidification, coal injection, fuel injection, natural gas injection and metallization charge. The model was used to calculate the influence of 22 factors on the coke ratio of seven large blast furnaces in China. At the same time, the coke ratio, air volume, top gas composition, gas utilization rate, direct reduction degree, The main parameters, and achieved satisfactory results. This model can also be used to predict coke and blast requirements per tonne of pig iron and top gas composition after changing operating conditions.