Abstract: Methods and systems for removing copper from ferrous scrap are described. Some amounts of copper in ferrous scrap are removed by oxidation and subsequent mechanical impact of the oxidized scrap. Further removal of copper from the solid scrap can be achieved by fluxing the copper oxide below the melting point of ferrous scrap using CaO—SiO2—B2O3- and Na2O—SiO2—B2O3-based slags. Using the invention, copper can be removed from ferrous scrap in a natural, cost-effective, and environmental-friendly manner.

Abstract: The invention relates to titanium oxide containing slag compositions and associated methods for reducing the nitrogen content of metals. The titanium oxide slag compositions can be used to reduce nitrogen content in various molten metals including steel, nickel, copper, iron, and the like. The nitrogen content of the metals can be reduced by contacting the metal with the titanium oxide containing slag composition. The slag compositions are capable of reducing the nitrogen content of steel to less than 20 ppm without the need for specialized high-quality starting materials or processing equipment.