Ferro-alloys:
Non ferrous metals and scrap:
Ferrosilicon, or ferrosilicium, is a ferroalloy an alloy of iron and silicon with between 15 and 90% silicon. It contains a high proportion of iron silicides. Its melting point is about 1200 °C to 1250 °C with a boiling point of 2355 °C. It also contains about 1 to 2% of calcium and aluminium. Ferro silicon is used in steelmaking and foundries as a source of silicon in production of carbon steels, stainless steels, and other ferrous alloys for its deoxidizing properties, to prevent loss of carbon from the molten steel (so called blocking the heat); ferromanganese, spiegeleisen, silicides of calcium, and many other materials are used for the same purpose. It can be used to make other ferroalloys. Ferro silicon is also used for manufacture of silicon, corrosion-resistant and high-temperature resistant ferrous silicon alloys, and silicon steel for electromotors and transformer cores. In manufacture of cast iron, ferro silicon is used for inoculation of the iron to accelerate graphitization. In arc welding, ferro silicon can be found in some electrode coatings. Ferro silicon is a basis for manufacture of prealloys like magnesium ferro silicon (FeSiMg), used for modification of melted malleable iron; FeSiMg contains between 3-42% of magnesium and small amounts of rare earth metals. Ferro silicon is also important as an additive to cast irons for controlling the initial content of silicon. Ferro silicon is also used in the Pidgeon process to make magnesium from dolomite. In contact with water, ferro silicon may slowly produce hydrogen. Ferro silicon is produced by reduction of silica or sand with coke in presence of scrap iron, millscale, or other source of iron. Ferro silicons with silicon content up to about 15% are made in blast furnaces lined with acid fire bricks. Ferro silicons with higher silicon content are made in electric arc furnaces. An overabundance of silica is used to prevent formation of silicon carbide. Microsilica is a useful byproduct. The usual formulations on the market are ferro silicons with 15, 45, 75, and 90% of silicon. The remainder is iron, with about 2% of other elements like aluminium and calcium. Its CAS number is [8049-17-0]. A mineral perryite is similar to ferrosilicon, with its composition Fe5Si2. Ferro silicon is used by the military to quickly produce hydrogen for balloons by the ferro silicon method. The chemical reaction uses sodium hydroxide, ferro silicon, and water. The generator is small enough to fit a truck and requires only a small amount of electric power, the materials are stable and not combustible, and they do not generate hydrogen until mixed.
Minaleg trades, buys and distributes ferro-alloys, non ferrous metals and scrap. Click on the menu at left for details on the origin, size and metal index of our products.
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Origin: China
Size: 10-50/80 mm
Analysis
| Si | min 65%, 73% or 75% |
| AI | max 2.0% |
| C | max 0.20% |