Flow patterns of additives used in animal feed manufacture during screw extractor feeding

Whether for additives or raw materials, operators may wish to predict flow rate and regulation according to screw speed in order to control dosing operations. These parameters depend on screw geometry and the linkage between the cell and the screw, and also on the physical properties of the dosed products. This research seeks to further insight into how the product factor impacts on dosing flow rates and regulation. A test was therefore carried out at an industrial site equipped with identical cell/screw systems leading to the same weighing bin. These tests used 5 reference additives whose physical properties were representative of all the additives generally used in the animal feed sector. The detailed physical properties of these products were determined and compared against industrial measurements