The product is suitable for wet magnetic separation of magnetic materials such as magnetite, pyrrhotite, roasting ore, ilmenite in mines; It is also used for the removal of mixed magnetic minerals from non-magnetic materials such as coal, non-metallic minerals and building materials; And the recovery of magnetic heavy medium in coal preparation; the concentration of low concentration slurry in iron ore and the enrichment of magnet minerals; used to remove ferromagnetic impurities in non-metallic minerals;