Primary distribution of coal gas in blast furnace raceway has an important effect on blast furnace ironmaking 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 section 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 concentration has different characteristics in different raceway zones.