the more obvious the interaction force between particles

To make two kinds of different permanent magnetic lifter, the necessary condition is that a strong magnetic force of the magnetic particles suffered should be more than competitive, the weaker the magnetic force of the magnetic particles suffered less than competitive. It should be noted, in practice, there can be no absolute magnetic pure magnetic products and non-magnetic products, in addition to the living body is not monomer dissociation affect product purity, some single magnetic particles into a non-magnetic products, some monomeric non-the magnetic particles into a magnetic product. In the former case, resulting in the recovery of the magnetic component is decreased, mainly due to the particle size of the magnetic particles is too small, the magnetic rods is insufficient to overcome fluid resistance and other competitive; the latter lead to decreased quality magnetic products because most of the particles of there is a strong interaction between the force, the finer the particle size, the greater the concentration of slurry