Analysis of influence of the basic parameters of the magnetic separator EcMS-500 for non-ferrous metals on the size of the force of separation

Eddy-current magnetic separator EcMS-500 for non-ferrous metals is primarily designed to separate aluminium cans from other waste, but it can separate other non-ferrous metals such as brass and copper. During operation, the magnetic roller of separator creates eddy current field. These currents interact with metallic waste and generate attractive forces and interact with non-ferrous metals (aluminium, brass, copper) generating repulsive forces. Consequently, due to the effects of eddy currents, aluminium cans and other waste of non-ferrous metals are separated by ejecting from the magnetic separator belt, while passing over the roller. The paper presents the different types of solutions of magnetic separators. A special review is given to the design of the magnetic separator EcMS-500. The influences of the magnetic roller speed (revolutions per minute) and the conveyor belt speed on the ejection distance of cans are analysed. Also, the effect of cans shape on the separation forces intensity is considered. For defined diameter of the belt guide roller, the analysis has identified the optimum revolutions per minute that provides sufficient force of separation for non-ferrous metals with minimal force that burdens the connection of the magnet and the rotor