Ferrosilicon contains a certain amount of carbon.
Too low carbon will affect the quality of steel in the smelting process.
One of the raw materials used to produce ferrosilicon is coke.
It acts as a reducing agent in the production of ferrosilicon.
When the temperature reaches 1187 ℃, the coke begins to dissolve.
The higher the silicon content in ferrosilicon is, the lower the carbon content is.
When the silicon content in ferrosilicon is more than 30%, most of the carbon in ferrosilicon exists in silicon carbide (SiC) state.
Silicon carbide is easily reduced by oxidation of silicon dioxide or silicon monoxide.
The solubility of silicon carbide in ferrosilicon is very low.
Especially when the temperature is low.
The content of residual silicon carbide in ferrosilicon is very low.
Therefore, ferrosilicon has a very low carbon content.