Densimetric Separator / Windshifter / Air-knife

The windshifter/densimetric separation technology consists of three components: conveyor belt, nozzle and rotation drum. The input material is spread in a single layer across the entire width of the conveyor belt. The material is then transported at an adjusted variable speed up to the discharge edge. Adjustable nozzles produce an upward variable stream of air on the discharge edge. The air stream gathers on the upper area of the rotation drum and is guided into the expansion room with the laminar flow. The material meets the stream of air and is separated into light and heavy material. The light material reaches the expansion room via the rotating drum which can be regulated in height. Here the speed of the air is radically reduced and the light materials trickle onto a container or land on a discharge conveyor. The heavy materials fall downward into a container or onto a discharge conveyor before reaching the rotation drum. The volume of air introduced in the expansion room is extracted in the upper area and sucked back in via the fan or guided into a filter system depending on the type of application. In order to obtain high-grade recycling materials, Secon has designed a windshifter that is used to sort the input material into two or three fractions at a high degree of separation efficiency (98%).