NGHIÊN CỨU CÔNG NGHỆ KHỬ LƯU HUỲNH …
The present invention relates to a method for producing ferro-silicon by using a copper smelting waste slag electric stove integral deoxidation and reduction including the steps as follows a obtaining a ferro-silicon of a high-temperature molten state by deoxidation and reduction of the copper smelting waste slag as an iron raw material and other raw …