Ferro Silicon Manufacturing Process

Ferro Silicon is an alloy made up of iron and silicon, widely used in steelmaking and casting. The manufacturing process involves smelting quartz (silica) and iron in a submerged arc furnace at very high temperatures. The key raw materials used in this process are silica, coke, and iron scrap.

The production starts with heating the raw materials in the furnace using carbon electrodes, reaching temperatures around 1800°C. At this high temperature, silica reacts with coke to form silicon carbide, which then further reacts to produce pure silicon and carbon monoxide gas. The silicon combines with molten iron to create Ferro Silicon.

Once the process is complete, the molten alloy is tapped from the furnace, cooled, and crushed into various sizes based on industry requirements. The final product is graded based on silicon content, typically ranging from 70% to 90% silicon. Different grades of Ferro Silicon are used for different applications, with FeSi 75 and FeSi 90 being the most common.