A ferro alloy composed of silicon and iron is Ferro Silicon. The silicon content in this ferro alloy is between 15% and 90%. There is high proportion of iron silicide in it. Other elements present in Ferro Silicon are calcium and aluminium. This corrosion and abrasion resistant ferro alloys is silvery grey to dark grey in color. Its particles are available in different forms, like milled, crushed and lumps. It might react with water for hydrogen production.