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Analysis of influencing factors on carbon monoxide utilization rate of blast furnace based on multi-timescale characteristics

In the blast furnace, due to the different changing frequency of different operations, and the different reaction time of gas, liquid and solid materials, there exists multi-timescale characteristics in the iron-making process. However, not enough attention has been paid to this characteristic, most of the analyses on the blast furnace state before are under a fixed time scale. So, this paper makes a analysis of influencing factors on carbon monoxide utilization rate of blast furnace based on multi-timescale characteristics. First, the factors that affect the carbon monoxide utilization rate are analyzed from different time scales. Next, in the short time scale, the individual influencing time scale of the permeability index, total pressure difference and top temperature is found by the support vector machine (SVM) algorithm. And in the long time scale, the influencing time scale of burdening is found. Finally the validity of each model is verified by the field data of the blast furnace.