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Blast furnace operation is a trade-off between the opposing targets of constant pig iron quality, and minimal cost per ton of hot metal. The cost of raw materials like iron ore and coal are external factors which cannot be influenced. However, operating the blast furnace at minimal coke rates by replacing some of the coke by additional tuyere fuels reduces the costs and CO2 emissions per ton of hot metal (thm). These additional fuels can either be of liquid form (e.g. crude oil, tar or natural gas) or of solid form like shredded waste plastics or pulverized coal. Due to constantly low coal prices the PCI technology is more and more replacing other fuel injections.1) However, using high PCI rates also brings some negative effects on blast furnace operation. Sert and Godijn, for example, reported an increased soot content measured in the top gas caused by an incomplete combustion of the injected coal in the raceway.2) Hence, a major issue for optimal coal combustion is to improve the dispersion of coal particles in the raceway and to optimize the conditions for a fast chemical reaction, respectively. These topics have been addressed by many authors over the last decades. While the dispersion of coal particles can Improving Blast Furnace Raceway Blockage Detection. Part 1: Classification of Blockage Events and Processing Framework