Pengaruh Kecepatan Putaran Tabung Ball Milling Menggunakan Bola Besi Terhadap…

The measurement of the magnetic susceptibility and composition of magnetic particles from the natural sand of the Rokan River in Riau Province has been done. Sand samples were taken at 5 different points with a distance of 500 meters from each point. The sample taken at each point has a mass of 1 kg. The samples were dried in the sun ray before separation between magnetic particles and non-…