In addition to iron (also known as magnetic, the magnetic separation) is the separation of different components based on differences in magnetic materials, using different types of iron removing machine will dressing method of material of different magnetic separation. The magnetic force of the magnet the surrounding space known as the magnetic field. Representation of a physical quantity of the magnetic field is called the magnetic field strength, commonly used symbols H said, the unit is A/m. Mineral magnetic difference is magnetic basis. Mineral magnetism can be measured according to the magnetic intensity, the mineral is divided into three categories: strong magnetic minerals, weak magnetic minerals, non magnetic minerals. The iron removing machine magnetic field, strong magnetic mineral magnetic force, weak magnetic minerals of magnetic force is small, non magnetic minerals without magnetic force or magnetic force is weak.
In the magnetic separation process, mineral particles by a variety of stresses, besides the magnetic, gravity, centrifugal force and drag force and friction force, etc.. When the magnetic mineral grains of magnetic force is greater than the rest of the force and, will be sucked out of or deviation from flows of material, a magnetic products, the rest is non magnetic products, realize the separation of different magnetic minerals.