Corrosion Behavior in Graphite Refractories Impregnated with ZrO2 and CeO2 Carrying Solutions

This paper investigates corrosion behavior in graphite refractory hot metal impregnated with ZrO 2 and CeO 2 carrying solutions used in Blast Furnace hearth, consisting of 50% graphite and 50% anthracite. Corrosions testswere carried out by means of finger test method in an induction furnace, using bar-shaped 30x30x280 mm test specimens and hot metal from CSN #2 Blast Furnace runner. The temperature chosen for this test was 1 520°C and 60-min isotherm. Upon test completion, test specimens were characterized by their dimensional variation, X-ray diffractometry and Scanning Electronic Microscopy (SEM).