Cyclone air separator (100, 200, 300) for separating granular material which is to be separated and which is suspended in a conveying gas, having - a first, cylindrical hollow member which has a tangential to helical inlet with respect to the cylindrical form for the conveying gas which carries the material to be separated, - a second, conical hollow member which is located under the first, cylindrical hollow member and which is connected directly to the first, cylindrical hollow member, wherein the tapered tip of the second, conical hollow member is directed downwards, - at least one immersion pipe which extends through the conical wall of the second, conical hollow member, which projects upwards inside the second, conical hollow member, and the opening of which is arranged in the volume of the first, cylindrical hollow member, wherein - the downwardly directed, tapered tip of the second, conical hollow member is connected to an outlet for fine material, wherein a rotating rod basket is arranged in the first, cylindrical hollow member, which rotating rod basket - is surrounded by a static and circular conveying channel for coarse material, which conveying channel abuts but does not make contact with the lower external circumference, wherein the conveying channel for coarse material is connected to an outlet out of the first, cylindrical hollow member, and - the volume which is surrounded by the rod basket is connected in terms of flow to the second, conical hollow member, characterized in that a substantially conical member, whose tapered tip is directed upwards, is arranged above the opening of the immersion pipe, wherein helically formed guiding plates whose winding direction corresponds to the rotation direction of the rod basket are provided on the external surface (O k) of the substantially conical member, and wherein the substantially conical member is connected to the rod basket via a shaft and conjointly rotates with the rod basket. - a first, cylindrical hollow member which has a tangential to helical inlet with respect to the cylindrical form for the conveying gas which carries the material to be separated, - a second, conical hollow member which is located under the first, cylindrical hollow member and which is connected directly to the first, cylindrical hollow member, wherein the tapered tip of the second, conical hollow member is directed downwards, - at least one immersion pipe which extends through the conical wall of the second, conical hollow member, which projects upwards inside the second, conical hollow member, and the opening of which is arranged in the volume of the first, cylindrical hollow member, wherein - the downwardly directed, tapered tip of the second, conical hollow member is connected to an outlet for fine material, - is surrounded by a static and circular conveying channel for coarse material, which conveying channel abuts but does not make contact with the lower external circumference, wherein the conveying channel for coarse material is connected to an outlet out of the first, cylindrical hollow member, and - the volume which is surrounded by the rod basket is connected in terms of flow to the second, conical hollow member, a substantially conical member, whose tapered tip is directed upwards, is arranged above the opening of the immersion pipe, wherein helically formed guiding plates whose winding direction corresponds to the rotation direction of the rod basket are provided on the external surface (O k) of the substantially conical member, and wherein the substantially conical member is connected to the rod basket via a shaft and conjointly rotates with the rod basket.