Thailand has plenty of river sand resource which is high quality of silica sand, upto % SiO2. In the northest, the river sand had been proved that the high iron contaimination Fe2O3 upto % can be lowered down to % by high gradient magnetic separation technology.
The magnetic separator ensures the uninterrupted flow of the liquid. A magnetic drum with close dense magnetic field is assembled on nonmagnetic SS shaft. Magnetic pole shoes are projected out to form fins", for better magnetic field alignment around the drum. The drum is .