Sometimes the carbon content of ferrosilicon is less than 0.1%, usually only 0.05-0.07%. What is the reason for this? Let's take a look below:
A large amount of data shows that the higher the silicon content in ferrosilicon, the lower its carbon content. According to data, when the silicon content in ferrosilicon is about 30%, the vast majority of carbon in ferrosilicon exists in the form of silicon carbide (SiC). Silicon carbide is easily oxidized and reduced by silicon dioxide or silicon monoxide in the crucible. Silicon carbide in ferrosilicon, especially at low temperatures, has a low solubility and is prone to precipitation and floatation. So, the silicon carbide remaining in ferrosilicon is very low, so the carbon content of ferrosilicon is very low.