Effects of SiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> Contents of Converter Slag on Metallurgical Properties

Abstract

Using ladle slag, ferrovanadium smelting slag as well as metallurgical auxiliary materials as raw materials, the converter slag with SiO2 content of 11.3% to 2.8%, Al2O3 content of 3.3% to 19.4% were prepared. The melting characteristics of slag were measured, at 1600 °C both dephosphorization and desulfurization tests of slag were conducted in atmosphere furnace. The research results show that the melting properties of slag are improved with the reduce of SiO2 content and the increase of Al2O3 content in slag, in favor of making high basicity slag in the early stages of BOF steelmaking. However, both dephosphorization and desulfurization of slag exhibit downward trend. The mechanism of SiO2 and Al2O3 contents of converter slag impact on metallurgical properties would be further discussed.