CORROSION OF BASIC REFRACTORIES IN COPPER METALLURGY

Abstract

Knowledge of corrosion processes on the melt – solid boundary is very important for life time of refractories and for refractory using design. The aim of this study was to realize and evaluate laboratory corrosion tests of three types basic refractories used in copper refining. Influence of the melts of CuO-Na2O.2SiO2 on the magnesia, magnesia-chromite and magnesia-carbon refractories was studied by crucible corrosion tests. The samples for the crucible corrosion test were made up from commercially manufactured refractories. The static crucible corrosion tests were carried out in laboratory electric resistive furnace at 1350 °C during 10 hours in air atmosphere. The results of tests were evaluated by macroscopic, microscopic and chemical analysis.