In secondary copper smelting processes, ZnO can be present in the fayalitic slag (FexO-SiO_2-based) and thus changes both the physical and chemical properties of the slag. The corrosion behavior of refractory lining by the ZnO-containing secondary copper smelting slag will be consequently affected. Therefore, the interaction between alumina-chrome refractories and ZnO-containing fayahte slags was investigated in this work by static refractory finger tests and alumina crucible tests at 1200 °C under Ar atmosphere. The microstructure of the corroded refractory samples and the slag composition were analyzed by electron probe micro-analysis equipped with wavelength dispersive spectroscopy (EPMA-WDS). The influence of the ZnO level on the Al_2O_3 dissolution and the Al_2O_3/slag interfacial reactions was studied. The experimental results from the alumina crucible tests were interpreted with thermodynamic calculations.
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