Abstract: A vessel is described for the continuous mixing of pourable powdered or granular materials with liquid components, the pourable material being supplied to the vessel at the top. A deflector deflects the still dry material so that it trickles down inside the vessel in a hollow cylindrical stream. As it falls down freely it is subjected to spray from one or more nozzles of the liquid which is to be mixed with it. One nozzle is provided beneath the deflector and can spray the downwardly trickling stream from the inside.