The invention relates to the technical field of fused
alumina zirconia
mullite bricks, and discloses a fused
alumina zirconia
mullite brick for a
hazardous waste rotary kiln and a preparation method thereof.The preparation method comprises the steps that aluminum
oxide, alkali
powder,
zircon sand and other raw materials are added into an electric furnace, the raw materials are subjected to high-temperature oxidation melting,
oxygen is blown into melt, then the melt is directly poured into a
casting mold from the electric furnace, and after
casting of a
casting is completed, the fused
alumina zirconia
mullite brick is obtained; after cold contraction for a period of time, the melt is fully cast in a shrinkage cavity, and the
casting mold is cooled in advance before casting, so that the
temperature difference between the casting and the
casting mold is increased, the width of a solidification area of the casting from the surface to the inside is reduced, the solidification shrinkage speed of the casting is slowed down, and the possibility of hot
cracking when the core part of the casting is finally solidified is reduced; meanwhile, in the casting process, the outside of the
casting mold is cooled, so that the situation that the temperature of the casting mold rises, material components of the casting mold are decomposed and gasified and chemically react with molten liquid is avoided, and the possibility that a pore layer appears on a casting or insufficient casting occurs is reduced.