Abstract:
The speed of ball milling vial affects the magnetic properties of its product. Research
on the composition, morphology and magnetic properties of natural sand particles from
Rokan River as a function of the vial speed . The sample of natural sand was collected
with a mass of 10 Kg and then dried under the sun ray before the separation process
between magnetic and non-magnetic particles using an Iron Sand Separator (ISS). The
result of the separation with the Iron Sand Separator is called the ISS product. The ISS
products were milled as a function the vial speed namely 100rpm, 150rpm and
200rpm. The number of milling balls used was 16 and are made of ceramic balls with
diameter of 1.5 cm. The products of ball milling was then separated using Neodymium
Iron Boron (NdFeB). The results of this study indicate the magnetic induction values
of the samples ranged from 7,032-7,499 mT for the same current of 400 mA, while the
magnetic susceptibility values obtained is around 34738,455 - 43686,529 × 10-5 . the
elemental composition the ball milling products was carried out using X-Ray
Fluorescence (XRF) The results showed that the Fe composition increased from
13.892% to 32.561% while the Si composition decreased from 56.53% to 38.556%.
The morphological properties of the ball milling products was carried out using
Scanning Electron Microscope (SEM). The results showed that the particle size
decreased from 1.583 m to 0.5028 m. The results showed that the optimum speed
for the vial is at a speed of 200 rpm.
