ABSTRACT
Magnetic separation is a physical separation of particles based on the magnetic property of the mineral particles. Magnetic flux density is the magnetic force at a point inside a magnetic material and is the resultant of the externally impressed magnetic field and the force due to the induced poles at the ends of the rod. If a wire is made into a loop and current is passed through it, the magnetic lines of force are circular around the wire all along its length. Bars of soft wrought iron, soft steel or cast iron are magnetized by electric currents through the insulated copper or aluminum wire windings around the iron bars. In an electromagnet, the induction for a current of given intensity decreases rapidly with an increase in the air gap and the force of attraction decreases even more rapidly with an increase in the air gap. Magnets used in magnetic separators are of two types: permanent magnets and electromagnets.
