Silicon slag is a by-product of smelting metal silicon and ferrosilicon.It is a kind of scum floating on the furnace in the process of smelting silicon.It is content is from 45% to 70%,and the rest are C,S,P,Al,Fe,Ca. It is much cheaper than purity silicon metal.Instead of ferrosilicon for steelmaking, can reduce the cost. Silicon slag 50 is Si greater than or equal to 50, Ca less than 5, S less than O0.1, P less than 0.05, C less than 5.
