Abstract: A device for continuously blending particulate materials has a central shaft, a plurality of metering elements which are each separately metering a respective particulate material, blending element for receiving and blending the metered quantities of particulate material and including a conveyor formed as an elongate member having a rotating axis coinciding with the axis of the shaft and disposed helically in turns about and concentric to the rotating axis, a drive for rotating the elongate member to trace out an envelope shape of the helically formed elongate member, and a casing accommodating the conveyor and having a discharge and a lower portion conforming to the envelope shape of the elongate member. The conveyor rotates in the casing to generate a conveying direction, and stirring members are provided on the conveyor and extend between some of its turns.