Ferrosilicon Production

Ferrosilicon is produced by reducing silica (SiO2) with coke or coal in an electric arc furnace. The process involves the following steps:

Raw materials preparation: The raw materials, including silica, coke, and iron, are selected and processed to meet the specific requirements of the ferrosilicon grade being produced.

Furnace charging: The prepared raw materials are loaded into the electric arc furnace and melted by the heat generated from the electric arc.

Reduction: Carbon from the coke or coal reacts with oxygen in the silica to form carbon monoxide and carbon dioxide gases. The carbon monoxide gas then reacts with the iron to form liquid iron and carbon dioxide gas. The reaction is exothermic and produces a significant amount of heat.

Alloying: The liquid iron reacts with the remaining silica to form ferrosilicon. The silicon content of the ferrosilicon depends on the amount of silica added to the furnace.

Tapping: The molten ferrosilicon is tapped from the furnace and cast into molds to form solid blocks or crushed into powder.

Post-treatment: The ferrosilicon is cooled and processed to remove any impurities and adjust its composition as needed.

The quality and properties of ferrosilicon depend on several factors, including the composition of the raw materials, the temperature and duration of the reduction process, and the post-treatment processing.