Atomized ferrosilicon powder 15% is a special powder product made by melting 75% of ferrosilicon and scrap materials and casting in high-pressure water jet. Particle sizes are typically between 212 microns and 20 microns. The main properties of FeSi 15% are magnetic properties, corrosion resistance and density. Atomized Ferrosilicon Powder 15% is typically used in DMS-Dense Media Separation applications where the separation density is higher than 3.0 specific gravity (sg) for static baths and 3.