Ferro Silicon slag is a byproduct of the production of Ferro Silicon alloy, which is commonly used as a deoxidizing agent in steelmaking. Ferro Silicon slag contains silicon, calcium, and iron in varying amounts, making it a suitable additive for steel production.

During the steelmaking process, oxygen and other impurities can enter the molten steel, which can affect its quality and strength. To remove these impurities, deoxidizing agents like Ferro Silicon slag are added to the molten steel. Ferro Silicon slag reacts with the oxygen and other impurities, forming a slag that can be easily removed from the steel.

Ferro Silicon slag is also used as an alloying agent in the production of steel. The silicon and calcium in the Ferro Silicon slag react with the steel, improving its strength and ductility. The iron content in the Ferro Silicon slag also helps to improve the overall quality of the steel.