Through the color of silicon slag: Silicon slag is mainly a ferroalloy product that has been carbonized. Its internal elements are mostly silicon slag (Sic). Generally speaking, products with higher silicon slag content will have a greener color, while products with lower silicon slag content will have a greener color. Silicon slag products are gray, while silicon slag with a silicon slag content of 50% to 90% is black. In this way, when selecting silicon slag, we can look at the color of the silicon slag product and quickly select silicon slag based on the color of the silicon slag.