Radial magnetic ring material and preparation mold and preparation method of multi-pole magnetic ring

The invention discloses a radial magnetic ring material and a preparation method of a multi-pole magnetic ring. The preparation method comprises the following steps: carrying out two times of fine grinding on permanent magnetic ferrite magnetic powder by adopting a wet grinding method to obtain slurry; the slurry is filtered to remove water, so that the water content of the slurry is 30%-33%; pressing and pre-magnetizing the blank through a mold to enable the density of the blank to be 2.8-3.2 g/cm < 3 > and the height of the blank to be 15-25 mm; the disordered slurry is pumped, the magnetic domain orientation direction is fixed, and the blank in the mold is demagnetized through a reverse magnetic field; the invention further discloses a radial magnetic ring material and a preparation mold used in the preparation method of the multi-pole magnetic ring. The multi-pole orientation problem of multi-pole blank pressing is solved, the high performance of products is ensured through orientation fixation of particl