Hydraulic density separation device

A hydraulic density separation device for separating a heavy material fraction with components of higher density from a light material fraction with components of lower density from a feed material, comprising:

• a conveying device for conveying away the heavy material fraction;
• a receiving chamber which can be filled with water for receiving the feed material;
• a flow generator for generating a water flow in the receiving chamber;
• and
• a water-fillable separation chamber for receiving the light material fraction;
• wherein the conveying device has a shaft with at least one screw conveyor section for conveying the heavy material fraction out of the receiving chamber;
• wherein the flow generator is designed and arranged in such a way that a flow path of the water flow leads from the receiving chamber into the separation chamber;
• wherein the conveying device has, in addition to the screw conveyor section, at least one washing section having a plurality of separate paddles arranged on the shaft;
• wherein an outflow opening of the flow generator opens into the receiving chamber and/or wherein the separation chamber is designed as a suction chamber for the flow generator;
• and
• wherein the receiving chamber has a curved deflection area for the water flow at least substantially opposite the outflow opening and/or below the shaft, and/or wherein a center axis of the outflow opening runs below a central longitudinal axis of the shaft.