Experimental phase relations between MgO-saturated magnesium-aluminate spinel (MgAl2O4) and CuOx-rich liquid

N. Hellstén*, P. Taskinen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Experimental phase equilibrium data for the Cu-O-Al2O3-MgO system is required to improve the performance of MgAl2O4-containing refractories and slagging in non-ferrous smelting. In this work, the phase relations of MgAl2O4 in the Cu-O-Al2O3-MgO system were studied experimentally in air within a temperature range of 1100-1400°C using the equilibration and quenching method. The chemical compositions of the phases in the quenched samples were determined using electron probe microanalysis (EPMA). Less than 1wt% of Al2O3 or MgO were found in the oxide liquid phase, whereas the solid MgAl2O4 and MgO phases contained up to 23wt% and 30wt% of 'Cu2O', respectively. Discrepancies between these results and the corresponding calculated values generated by the MTDATA 6.0 software and Mtox database Version 8.2 ranged from 3wt% to 19wt%. The results of this work indicate that the MgAl2O4 spinel is chemically stable in the presence of a CuOx-rich liquid under the conditions studied.

Original languageEnglish
Pages (from-to)1116-11122
JournalCeramics International
Volume43
Issue number14
DOIs
Publication statusPublished - Oct 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • C. Chemical properties
  • D. Spinels
  • E. Refractories
  • MgO

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