Our Ferro Silicon has the following chemical analysis:
70% min / 72% min or 75% min
0.1% max / 0.50% max / 1% max / 1.5% max
1mt big bags
Drums on pallets
About Ferro Silicon
Ferro Silicon is formed by combining Iron and Silicon with a usual Silicon content of over 70% for steel application. This additive is used with other ferro alloys in the deoxidising process of steel, as well as in the production of Silicon itself. Ferro Silicon is used in the production of cast iron, as Ferro Silicon can accelerate graphitisation. Ferro Silicon replaces the need for Ferro Manganese, Spiegeleisen and Calcium Silicides in the manufacturing process.
Properties of Ferro Silicon
Ferro Silicon has a melting point of 1200°C to 1250°C with a boiling point of 2355°C and contains about 2% of Calcium and Aluminium. Ferro Silicon, as an additive to the production process of ferrous metals, will impart several desirable properties upon the resultant alloy. Some of the primary benefits of adding Ferro Silicon to an alloy is to improve the corrosion resistant properties and to improve the high temperature heat-resistance of the new alloy.
Production of Ferro Silicon
Silica (or sand) is mixed with coke and then a reduction process takes place in the presence of millscale, scrap or another source of Iron. Steel grade Ferro Silicon is produced in an electric arc furnace but a blast furnace can be used for Ferro Silicon with a lower Silicon content (e.g. 15% Si).
Uses of Ferro Silicon
The main applications of Ferro Silicon are in Carbon Steel and Stainless Steel production. It is also used in the Pidgeon process to produce Magnesium from Dolomite. Applications in the production of other alloys include the manufacture of Silicon Steel for electro motors and cores as well as coatings used during arc welding.
One useful by-product of the production process is Silica Fume, which is later added to concrete mixes to improve compressive and bonding strength there. Silica Fume is available from Westbrook in various grades.