Structure-property correlations of CaO-SiO 2-MnO slag derived from Raman spectroscopy

Abstract

The quantitative structural information such as the relative abundance of silicate discrete anions (Q n units) and the concentration of three types of oxygens, viz. free-, bridging- and nonbridging oxygen can be obtained from micro-Raman spectra of the quenched CaO-SiO 2-MnO glass samples. Various transport properties such as viscosity, density, and electrical conductivity can be expected as a simple linear function of žln (Q 3/Q 2),' indicating that these thermophysical properties are strongly dependent on a degree of polymerization of silicate melts in the composition of silica content greater than about 30 mol%. The present methodology is believed to be widely extended to various slag systems in ferrous and non-ferrous metallurgical communities. © 2012 ISIJ.