The invention relates to a cyclone separator for blast furnace gas including: a cyclone vessel having a central axis and including a side wall, a top wall and bottom wall; a first inlet duct connected with an end to the side wall of the cyclone vessel at a predetermined position intermediate the top and bottom wall; and a central outlet duct which traverses through the top wall of the cyclone vessel and extends into the cyclone vessel, and a further inlet duct connected with an end to the side wall of the cyclone vessel in circumferentially spaced relationship to the first inlet duct.