1. Improper content of aluminum, phosphorus, and calcium in ferrosilicon can promote the pulverization of ferrosilicon. When the content of aluminum and phosphorus increases to a certain value at the same time, this type of ferrosilicon is prone to powdering in air with high humidity. The phosphorus content in ferrosilicon is less than 0.04%, and the aluminum content is less than 3%, making it less prone to powdering;
2. We have observed and studied the effect of silicon content on the pulverization phenomenon of ferrosilicon. It is preliminarily believed that the low silicon content (mostly waste) in ferrosilicon is often prone to pulverization. The reason for this may be due to the decrease in temperature and volume expansion of silicon and iron compounds such as FeSi and FeSi2 in ferrosilicon, resulting in ferrosilicon pulverization. The main reason for the pulverization of ferrosilicon is the formation of aluminum hydroxide and gas when ferrosilicon containing aluminum meets water;
3. The cooling rate after pouring also has an impact on the pulverization of ferrosilicon. The cooling speed of ferrosilicon is fast, and the degree of segregation of silicon is small, making it less prone to pulverization; If the cooling speed is slow and the degree of segregation of silicon is high, it is easy to produce pulverization. Similarly, if the thickness of silicon iron ingots is thicker, it is easy to produce pulverization, and if they are thinner, it is not easy to produce pulverization.