Ferro silicon 1.composiyion:Si,Fe,Al,Ca,S.P, ... ,iron casting 3.high quality,low price 4.Ningxia Ferro silicon Ferro silicon is a kind of ferroalloy which is composed ... of ferrum and silicon. Ferro silicon used coke, quartz (or silica) as raw material ... IMPORT&EXPORT CO.,LTDCONTACT:SUNNYTEL:86-0411-83611644/0086-15998488207 Ferro silicon72%&75% used for steel-making