Abstract: The invention provides a material feed process for magnetically separating magnetic and non-magnetic particles from a material feed by means of a magnetic roller separator wherein the process is characterised therein that particle separation is independent of centrifugal force, and where the process can equally well be applied to both wet and dry particle separation. The process specifically provides feeding the particles at an incident zone above the horizontal axis centre line, and separating the magnetic and non-magnetic particles at opposite rotational sides of the roller.