Phase Distribution During Slag Formation in Mn Ferroalloy Production

Abstract Phase development during slag formation and reduction of Comilog Assmang ores in a setup that simulates the conditions an industrial SAF process under different coke bed temperatures, 1473 K (1200 °C), 1673 (1400 °C) 1773 K, (1500 was investigated. Graphite crucibles were utilized to contain charge as heating element induction furnace. A temperature profile established, cross-sectional excavations made, samples core drilled at selected positions. The resultant phases, i.e. , metal, examined electron probe microanalyzer (EPMA) coupled with wavelength-dispersive spectrometry (WDS). equilibrium phase relations MnO–SiO 2 –CaO–MgO–Al O 3 oxide system calculated using FactSage 7.3 thermochemical software. Differences ore compositions revealed significant differences behavior these manganese sources. is highly influenced by position relation bed, two-phase region, manganosite + liquid, dominant on top liquid inside bed. solid monoxide has been found be purely MnO. In contrast Comilog, solution significantly high FeO content forms (Mn,Mg,Fe)O solution, which becomes more enriched MgO increases extent. Due lower concentration CO gas for prereduction this experimental setup, iron oxides are reduced instead Fe subsequently stabilized solution.