Structural Changes in Binder During Oxidation of Periclase-Carbon Refractories

Abstract

Results are given for the change in binder structure in periclase-carbon refractories during heat treatment in an oxidizing atmosphere. After total burn-off at 1000°C carbon, securing periclase grains, the reduction in refractory strength in compression measured at room temperature is 64% of the original, but an object does not disintegrate. An inorganic chemical bond plays the role of a binder consisting of very fine calcium and iron silicates and fine fractions of magnesium, calcium, and iron oxide solid solutions. The results obtained make it possible to predict more reliably the change in refractory properties in service proceeding from the raw material components used.