How to separate Magnetite (Fe3O4) 3-30 micrometer susspended particles in water?

I have a 5000 cubic meter per hours water stream which contains about 0.1% suspension of magnetite. The particles size are ranged between 3 to 30 microns. Any idea? Hydro-cyclones? Magnetic field?...

29 September 2017 6,767 3 View