Low-cost fly ash refractory material and preparation method thereof
A technology of refractory materials and fly ash, applied in the field of refractory materials, can solve problems such as inability to fully describe refractory materials, and achieve the effects of light weight, stable chemical properties, and high thermal conductivity
Inactive Publication Date: 2015-10-07
MAANSHAN JINSHENG IND DESIGN
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Problems solved by technology
However, it is not possible to fully describe refractory materials only by the definition of refractoriness. 1580°C is not absolute.
Method used
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Experimental program
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Embodiment 1
[0020] A low-cost fly ash refractory material, which is composed of the following raw materials by weight:
[0021] Sisal fiber 10, magnesium fluoride 0.5, ethyl orthosilicate 30, fly ash 93, alumina 42, water glass 10 with modulus 3, zinc phosphate 1, phenolic resin 7, 13mol / l nitric acid solution 4, Glacial acetic acid 2, monoethanolamine 0.13, ammonium metaborate 0.4.
[0022] A method for preparing low-cost fly ash refractories includes the following steps:
[0023] (1) Mix the fly ash with magnesium fluoride, grind it into fine powder, send it to the muffle furnace, calcine at 750°C for 2 hours, add it to a 10mol / l sulfuric acid solution after cooling, soak for 2 hours, filter, Wash the filter residue with water three times, add water glass with a modulus of 3, and stir evenly to obtain a mixed silicon liquid;
[0024] (2) Add sisal fiber to 5% potassium bisulfite solution and soak for 3 hours, take it out and dry it, add nitric acid solution, stir and mix for 30 minutes, add ed...
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Abstract
The invention discloses a low-cost fly ash refractory material. The low-cost fly ash refractory material comprises, by weight, 10-12 parts of sisal fibers, 0.5-1.2 parts of magnesium fluoride, 26-30 parts of ethyl orthosilicate, 80-93 parts of fly ash, 30-42 parts of alumina, 6-10 parts of water glass with the modulus of 2-3, 1-2 parts of zinc phosphate, 6-7 parts of phenolic resin, 3-4 parts of a nitric acid solution with the concentration of 10-13mol / l, 2-3 parts of acetate acid gracial, 0.1-0.13 parts of monoethanolamine and 0.4-2 parts of ammonium metaborate. Ethyl orthosilicate is hydrolyzed in the presence of acetate acid gracial used as a catalyst to form a silanol sol, the silanol sol is mixed with a fiber emulsion, a solvent is evaporated to obtain a heterocomplex containing carbon and silicon, and high temperature carbonization is carried out with the fiber emulsion as a carbon source to obtain a carbon and silicon composite assistant. The carbon and silicon composite assistant has the advantages of stable chemical performances, high heat conduction coefficient, small heat expansion coefficient, heat shock resistance, light weight and high strength.
Description
Technical field [0001] The invention relates to a refractory material, in particular to a low-cost fly ash refractory material and a preparation method thereof. Background technique [0002] Refractory materials refer to a class of inorganic non-metallic materials with a refractoriness not less than 1580°C. Refractoriness refers to the Celsius temperature at which a refractory cone sample can resist high temperature without softening and melting under no load. However, only the definition of refractoriness cannot fully describe refractory materials, and 1580°C is not absolute. It is now defined as all materials whose physical and chemical properties allow it to be used in high-temperature environments are called refractory materials. Refractory materials are widely used in metallurgy, chemical industry, petroleum, machinery manufacturing, silicate, power and other industrial fields, and are used the most in the metallurgical industry, accounting for 50%-60% of the total output....
Claims
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IPC IPC(8): C04B35/66
Inventor 吴铭
Owner MAANSHAN JINSHENG IND DESIGN