Cold Model of Coal Gas Component Concentration Distribution in Blast Furnace Raceway

Primary distribution of coal gas in blast furnace raceway has an important effect on blast furnace ironmak-ing process. The coal gas component concentration distribution was studied experimentally using a three-dimensional cold model. The results showed that CH_4 concentration diminishes along with the height increasing on vertical sec-tion of raceway, and the concentration is the highest in the bottom of raceway. CH_4 concentration increases gradually along the raceway depth with the lowest concentration value in front of the tuyere. The distribution of CH_4 concen-tration has different characteristics in different raceway zones.