FeSi70

FeSi70, commonly referred to as 70% iron-silicon alloy, is a high-purity ferrosilicon product widely used in the production of electrical steel. This alloy is characterized by its high silicon content, typically ranging between 68% and 72%, with the remainder primarily composed of iron and trace amounts of other elements. The designation "70" in its name indicates the approximate percentage of silicon by weight, distinguishing it from other ferrosilicon grades such as FeSi50 or FeSi75.

FeSi70 is primarily utilized as a deoxidizing and desulfurizing agent in steelmaking. When added to molten steel, the silicon in FeSi70 reacts with oxygen and sulfur, reducing their concentrations and improving the steel’s quality. This process enhances the steel’s mechanical properties, such as ductility and toughness, making it suitable for applications requiring high performance, such as transformer cores and electric motors. The alloy’s high silicon content also contributes to its effectiveness in refining steel alloys for electrical applications, where low magnetic losses and high permeability are critical.

The production of FeSi70 involves the reduction of silica (SiO₂) with carbon in an electric arc furnace or submerged arc furnace. The raw materials typically include quartzite, anthracite coal, and limestone, along with scrap iron or other iron-bearing materials. The resulting alloy is then crushed, screened, and packaged for industrial use. Due to its specialized applications, FeSi70 is often produced under controlled conditions to ensure consistency in composition and purity.

FeSi70 is supplied in various forms, including lumps, granules, or powder, depending on the specific requirements of the steelmaking process. Its use extends beyond steel production, with applications in foundries, non-ferrous metallurgy, and chemical industries. The alloy’s efficiency in refining processes has made it a staple in modern metallurgical operations, contributing to the production of high-quality steel and electrical materials.