The aluminum content in ferro silicon can have a significant impact on the production of steel and casting products.
When aluminum is added to ferro silicon, it can act as a deoxidizer in the steelmaking process. This is because aluminum has a high affinity for oxygen, so it can react with any remaining oxygen in the molten steel to form aluminum oxide (Al2O3), which then rises to the surface and can be removed. This deoxidation process is important because oxygen in steel can cause porosity, brittleness, and other defects.

In addition to deoxidation, the aluminum content in ferro silicon can also affect the strength and fluidity of the steel or casting product. When aluminum is added to ferro silicon, it can improve the strength of the resulting steel, making it more durable and resistant to wear and tear. However, if too much aluminum is added, it can decrease the fluidity of the molten steel, making it more difficult to cast and resulting in surface defects.

Therefore, the optimal aluminum content in ferro silicon will depend on the specific requirements of the steel or casting application. It is important to consult with a metallurgist or materials engineer to determine the appropriate aluminum content in ferro silicon for a particular process.