Relationship Between Phase Composition, Thermal Conductivity and Corrosion Resistance of Fused-Cast AZS Refractories

Abstract: The fused-cast refractory is the key lining material for glass furnaces; Its high corrosion resistance and low thermal conduction, which are determined by the phase structure, are a main focus of its development. In this paper, the relationship between the phase composition, the thermal conductivity and the corrosion resistance to glass-liquid was investigated by means of numerical simulation combined with a melting test. A phase structure and thermal conductivity corrosion resistant model with a eutectic content of 40-70 % and an average equivalent eutectic grain size 5-25 μm was established. It shows that the uniformity of thermal insulation and corrosion resistance of the material can be achieved by increasing the eutectic content and refining the eutectic grains. At the same time, by using a computer-controlled melting process, low thermal conductivity and high corrosion resistance of fused-cast AZS refractories can be produced, which can improve the energy saving effect with a glass furnace insulation and a safe operation time.