Ferro Silicon

Ferrosilicon is an ferroalloy composed of iron and silicon. It is one of the most essential alloys in the steel industry. It is characterized by its silvery-gray color, hard and brittle nature. Its primary value lies in its roles as a deoxidizer and alloying agent.It has 72%-95% Si content, strong deoxidation, melting point ~1300℃, customizable forms. Usually do as the below forms：

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Ferrosilicon is primarily produced by reducing silica (quartz) with carbon in a submerged arc furnace. Raw materials (silica, iron ore, coke) are smelted via high-temperature reduction in a submerged arc furnace (1600-1800℃) to form alloy with 72%-95% Si. The molten alloy is tapped from the furnace, cast into ingots, and then crushed into standard sizes.

Steelmaking: Primary Deoxidizer: Its high silicon content makes it the go-to deoxidizer for carbon steel and low-alloy steel production. It reacts with dissolved oxygen in molten steel to form stable SiO₂ slag, reducing oxygen levels to ≤0.005%-preventing defects like porosity, cracks, and inclusions in finished products (e.g., construction rebars, automotive structural steel, and mechanical engineering components).

Casting: Inoculant & Alloying Agent: Enhances the quality of gray cast iron and ductile iron by refining graphite grains, improving toughness, and reducing shrinkage/looseness in large castings (e.g., machine tool beds, engine blocks, and pipe flanges). It also adjusts silicon levels in cast iron to optimize mechanical properties, achieving tensile strengths of ≥250 MPa for gray cast iron.

Ferroalloy Production: Acts as a core raw material for manufacturing silicomanganese (SiMn) and silicochromium (SiCr) alloys. Its silicon content boosts the deoxidation and alloying efficiency of these derivatives, making them essential for stainless steel and special steel production.

Welding & Powder Metallurgy: FeSi75 powder (100–325 mesh) is integrated into submerged arc welding fluxes to enhance weld strength and corrosion resistance, critical for heavy-duty applications like shipbuilding and pipeline construction. In powder metallurgy, it is blended with iron powder to produce high-hardness structural parts (e.g., automotive gears) with a hardness of HV ≥180.

Industrial Auxiliaries: Serves as an economical "furnace cleaning agent" in blast furnaces, dissolving slag buildup on furnace walls to maintain operational efficiency. It also improves high-temperature stability when added to refractory bricks used in steelmaking furnaces and industrial kilns.

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