The high-frequency pulse demagnetizer is widely used in magnetic separation plants prior to classification, screening, and filtration to effectively reduce residual magnetism. This significantly enhances screening and classification efficiency, lowers the moisture content of the concentrate filter cake, and improves overall beneficiation indicators.

In heavy medium coal washing systems, the weighting agent used is ferromagnetic mineral powder, which retains significant residual magnetism after magnetization, leading to severe magnetic agglomeration, rapid settling rates, and poor stability. Demagnetization can greatly reduce the settling speed of the medium and enhance stability.

In the mechanical processing of powder metallurgy, ferromagnetic components exhibit high residual magnetism after exposure to a magnetic field, attracting or adsorbing iron powder, which can adversely affect subsequent operations such as grinding, magnetic lifting, and shearing.