Composite combining corundum based refractory materials

Abstract

The invention relates to a composite sialon-corundum fire-resisting material, which is characterized in that the formulation of the fire-resisting material comprises the following: 30 to 54 percent of corundum or aluminum oxide hollow sphere the diameter of which is between 3 and 1 millimeter, 7 to 30 percent of the corundum or the aluminum oxide hollow sphere the diameter of which is between 1 and 0.0088 milliliter, 16 to 30 percent of corundum powder the diameter d90 of which is less than 0.088 millimeter, 3 to 10 percent of alpha aluminum oxide micro powder, 2 to 8 percent of hydrated aluminum oxide, 0.2 to 2 percent of siliceous dust, 0 to 2 percent of barium aluminate cement, 0.05 to 0.4 percent of efficient water reducing agent (which is prepared from polycarboxylic acid, sulfonated naphthaldehyde polymer and sulfonated melamine polymer), 1 to 6 percent of polyacrylic acid emulsion, and 1 to 6 percent of water. The composite sialon-corundum fire-resisting material obviously has the advantages of coagulation, hardening, demolding, drying and heating performances remarkably similar to a low cement casting material, and good high-temperature resistant performance, and can be made into various products or be used as an unshaped material.

Description

technical field

[0001] The invention relates to a high-grade corundum refractory material, which has the advantages of good high temperature resistance, strong thermal shock resistance, wide sintering temperature range, and is convenient for manufacturing into large-scale and special-shaped products. It is suitable for kiln furniture and other new-type high-temperature kiln equipment. Refractory materials are used. Background technique

[0002] Generally, corundum refractory materials are used to build high-temperature kilns. With the increase of energy prices, high-temperature kilns have more energy-saving and fast-firing features. For enhanced insulation, the kiln car or kiln lining can use hollow or concave bricks filled with lightweight materials. In order to reduce heat absorption, the kiln furniture can also be hollow. Also, a pusher kiln can be used instead of a tunnel kiln. In these occasions, it is necessary to use materials with good high temperature resistance...