High-temperature fireproof kiln material and preparing method thereof

Abstract

The invention discloses a high-temperature fireproof kiln material, which comprises the following components, by weight, 40 to 80 parts of aluminum oxide, 40 to 60 parts of 80-mesh white corundum, 1 to 10 parts of secondary ripe porcelain, 2 to 8 parts of Suzhou lime sludge, 1 to 4 parts of silicon dioxide, 0.2 to 1.0 part of oleic acid, 3.2 to 7.8 parts of paraffin wax, 1.2 to 2.4 parts of wax and 0.1 to 0.5 part of ammonium polyacrylate. Air holes of the kiln material utilizing the secondary ripe porcelain as raw materials are more compact and higher in density, and the kiln material is much lower in contractibility rate and high in heat and shock resistance stability, is not easy to burst when used at a high temperature, capable of bearing high temperature ranging from 1800 DEG C to 2000 DEG C, long in service life and has excellent performances of high strength, high fire resistance, high wear resistance and the like by the aid of the secondary ripe porcelain which is resistant tohigh temperature and high in wear resistance. Further, the secondary ripe porcelain as waste can be recycled, so that cost is saved, waste can be changed into treasure, and pollution to the environment is reduced. The high-temperature fireproof kiln material is simple in preparing process, easy to control in conditions and can be produced in large scale industrially.

Description

technical field [0001] The invention relates to a refractory material, in particular to a high-temperature refractory kiln furniture material and a preparation method thereof. Background technique [0002] Kiln furniture is a kind of high-grade refractory material, and its quality has a direct impact on the quality and production cost of fired products. The material of kiln furniture should have high refractoriness, good thermal stability, high room temperature and high temperature strength, must withstand the load of its products and kiln furniture itself, good thermal conductivity, low heat storage and oxidation resistance performance. [0003] Since the 1980s, the rapid sintering technology of ceramics has been promoted at home and abroad, and silicon carbide ceramics has become the first choice for high-temperature kiln furniture for rapid sintering kilns. However, silicon carbide kiln furniture materials have high-temperature oxides, that is, high-temperature oxidation...

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Problems solved by technology

[0003] Since the 1980s, the rapid sintering technology of ceramics has been promoted at home and abroad, and silicon carbide ceramics has become the first choice for high-temperature kiln furniture for rapid sintering kilns. However, silicon carbide kiln furniture materials have high-temperature oxides, that is, high-temperature oxidation products will undergo volume expansion. , making the structure of kiln furniture loose, resulting in cracks and directly affecting the service life and quality of kiln furniture. At present, this problem has not been well resolved

[0004] Alumina is used as a kiln furniture material due to the limitation of the properties of alumina itself, the kiln furniture material produced has a large shrinkage rate, low density, large pore size and is difficult to control, so the thermal shock resistance is poor, and it is easy to burst when used at high temperature. When the temperature is above 1250 degrees, the high temperature load decreases rapidly with the increase of temperature, and the service life is short

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