Iron activity measurements and spinel-slag equilibria in alumina-bearing iron silicate slags
نویسندگان
چکیده
Alumina is a common substance deporting in copper smelting slags when various secondary fractions, e.g. e-scrap or WEEE, are used as feedstock such along with primary sulphide concentrates. Properties of iron-silicate at high alumina concentrations, the iron-alumina spinel saturation, have been studied 1300 °C by temperature equilibration-quenching method combined EPMA (electron probe microanalysis) phase composition data from polished sections. The equilibrations were performed fixed oxygen activity platinum palladium powder, which dissolved iron slag and generated heterogeneous equilibrium system, characterised general criterium isothermal isobaric conditions, as. ? alloy (Fe) = (Fe). This was for measuring experimentally activities molten silicate slags. locations spinel-liquid tie-lines also determined partial pressure range 10 ?6 –10 ?10 atm. A comparison recent critical thermodynamic assessments Fe–O–Al 2 O 3 system indicates that spinel-corundum boundary silica-containing systems function too steep thus assessed databases do not match experimental this study. liquid domain silica to oxide saturation smaller than expected earlier, locates higher concentrations obtained Mtox database. • New, measured regarding Fe–Pt Fe–Pd alloys obtained. values reasonable agreement Clear differences observed between spinel-alumina
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ژورنال
عنوان ژورنال: Journal of Alloys and Compounds
سال: 2021
ISSN: ['0925-8388', '1873-4669']
DOI: https://doi.org/10.1016/j.jallcom.2020.157539