Ferrosilicon is a ferroalloy composed of iron and silicon. Ferrosilicon is an iron silicon alloy made from coke, steel filings, quartz (or silica) by electric furnace smelting.
It's a typical Ceramic Conical Burr for Coffee grinder that is made of 95% aluminum oxide ceramics. Due to its excellent wear resistance, cost effective and eco-friendly characteristics, it have been widely accepted by many coffee grinder manufacturers.