Ferro Silicon
SPECIFICATION
- Si : 70 %min
- Al : 1.5% max
- C : 0.1% max
Properties and Application
- Ferro alloy composed of silicon and iron
- Silicon content in ferro alloy ranges between 15% and 90%.
- Corrosion and abrasion-resistant ferro alloys will be silver grey to dark grey in color
- Ferro silicon formulations include silicon content of 15%, 45%, 75%, and 90%.
- It is used for reducing metals for their oxides and deoxidizing steel & other ferrous alloys.
- Several ferro alloys can be made using ferro silicon.
- It is used in electrode coatings in arc welding.
- It is used in the production of carbon steel, silicon steel and stainless steel.
- Chemical industry use it for the production of silicon copper.
Description
Ferrosilicon is produced by reduction of silica or sand with coke in the presence of iron. Typical sources of iron are scrap iron or millscale. Ferrosilicons with silicon content up to about 15% are made in blast furnaces lined with acid fire bricks. Ferrosilicons with higher silicon content are made in electric arc furnaces. The usual formulations on the market are ferrosilicons with 15%, 45%, 75%, and 90% silicon. The remainder is iron, with about 2% consisting of other elements like aluminium and calcium. An overabundance of silica is used to prevent formation of silicon carbide. Microsilica is a useful byproduct.
