Alumina refractory material for high-temperature kiln

• Main Author: LIU MINGHONG
• Format: Patent
• Language: Chinese; English
• Published: 12.02.2019
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; KILNS; LIGHTING; LIME, MAGNESIA; MECHANICAL ENGINEERING; METALLURGY; OVENS; REFRACTORIES; RETORTS; SLAG; TREATMENT OF NATURAL STONE; WEAPONS

The invention discloses an alumina refractory material for a high-temperature kiln, and belongs to the technical field of refractory materials. The alumina refractory material comprises a back fire layer, U-shaped hooks and a composite fire facing layer, and the back fire layer comprises a matrix and aggregate. The matrix includes clay and Al2O3 micro powder. The aggregate includes alumina hollowballs, chromium oxide particles and a high-temperature-resistant binder. The composite fire facing layer is a high-temperature working surface of the alumina refractory material, and includes an expanded vermiculite-graphite mixed emulsion and far-infrared radiation coating. A preparation method of the alumina refractory material comprises the following steps of preparing the matrix, preparing theaggregate, preparing the back fire layer, preparing the expanded vermiculite-graphite mixed emulsion and applying the far-infrared radiation coating on the surface of the expanded vermiculite-graphite mixed emulsion. The alum