Performance evaluation of pulverized coal injection of blast furnace based on principle component analysis

An updated approach to refining core indicators of pulverized coal used for blast furnace injection based on principal component analysis was proposed in view of the disadvantages of the existing performance indicator system of pulverized coal used in blast furnace. All the performance indicators of pulverized coal injection were takeninto account in this presented method, including calorific value, igniting point, combustibility, reactivity, flowability, grindability, etc. Thereafter, the four core indicators of pulverized coal injection were selected and studied by using principal component analysis, namely, comprehensive combustibility P₁, comprehensive reactivity P₂, comprehensive flowability P₃, and comprehensive grindability P₄. The newly established core index system was not only beneficial to narrow down current evaluation indices but also effective to avoid previous overlapping problem among indicators by mutually independent index design. Based on overall 4 characteristic indexes, the injection characteristics evaluation index P was further introduced, and combined with fundamental characteristics evaluation index F, the final evaluation of pulverized coal performances was obtained.