Causes of ferro silicon powdering

Causes of ferro silicon powdering.
The aluminum, phosphorus and calcium content in ferro silicon are key factors affecting powdering. When the content of these elements exceeds a certain range, ferro silicon is prone to powdering in an environment with high humidity. Studies have shown that when the phosphorus content in ferro silicon is less than 0.04% and the aluminum content is less than 3%, powdering rarely occurs. At the same time, the silicon content will also affect the powdering of ferro silicon, and ferro silicon with low silicon content is often more prone to powdering. In addition, the cooling rate after pouring and the thickness of the ferro silicon ingot will also affect the powdering. Slow cooling and thick ingots are prone to powdering, while fast cooling and thin ingots are not easy to produce powdering. Therefore, the silicon content and the content of other key elements in ferro silicon should be strictly controlled during the production process to reduce the occurrence of powdering.