... casting 3.no dust,unweathered lump 4.all size ferro silicon 1.composition:Si,Fe,Ca,S,P,C2. ... making,iron casting3.no dust,unweathered lump4.all size Ferro silicon is a kind of ferroalloy which is composed ... of ferrum and silicon. Ferro silicon used coke, quartz (or silica) as raw material ... :86-0411-83611644/0086-15998488207 We supply ferro silicon of high quality