Part 9 of the series Magnetic field assisted fluidization (MFAF) - a unified approach continues with separation processes addressing mechanical processing encompassing fluidization, sedimentation, deep bed filtration by magnetizable matrices, aerosol filtration, etc. The review refers not only to devices carrying out mechanical separations but also to basic physical phenomena controlling them such as particle aggregation (magnetic flocculation) and approaches to model them and correlate experimental data.