Composite bonding agent for sliding plate refractory material and preparation method thereof

Abstract

The invention relates to a composite bonding agent for a sliding plate refractory material and a preparation method thereof. The technical scheme of the preparation method comprises the following steps of: adding absolute ethyl alcohol into phenolic resin to prepare 30 to 60 weight percent of solution of phenolic resin and absolute ethyl alcohol; adding modified white carbon black into the solution of phenolic resin and absolute ethyl alcohol, wherein the adding amount of the modified white carbon black is 1 to 15 weight percent of the phenolic resin; stirring for 3 to 6 hours at the temperature of 30 to 50 DEG C to obtain mixed liquid of white carbon black and modified phenolic resin; and decompressing and distilling the mixed liquid to remove ethanol so as to obtain the composite bonding agent for the sliding plate refractory material. The preparation method has the advantages of simple process, low production cost and contribution to industrial production. The modified white carbonblack is spherical, so that the white carbon black can be uniformly and well dispersed in a phenolic resin substrate with good dispersion effect. The prepared composite bonding agent has the advantages of high residual carbon rate and high oxidization resistance in a middle temperature area. The sliding plate refractory material prepared from the composite bonding agent has the advantages of relatively high breaking strength and compression strength, relatively low volume density and relatively high hydrability resistance.

Description

technical field [0001] The invention relates to the technical field of composite binders for refractory materials, in particular to a composite binder for sliding board refractory materials and a preparation method thereof. Background technique [0002] Phenolic resin is a synthetic resin that was first discovered and widely used, and it has a wide range of applications due to its many properties. It began to be used as a binder for refractory unfired products in 1975. At present, carbon-containing refractory materials still widely use phenolic resin as a binder. Compared with the tar pitch binder, the resin has the advantages of thermohardness, high drying strength, high carbon residue rate, and less environmental pollution; but its thermal decomposition temperature is low, the carbon residue rate after carbonization is low, and the medium temperature region is resistant to oxidation. Poor ability. [0003] There are many ways to improve the heat resistance of phenolic re...

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Problems solved by technology

At present, many researchers improve the performance of phenolic resin binder by modifying phenolic resin with nano-silica or silicone, such as the patented technology of "modified phenolic resin and its preparation method" (CN200810064950), which consists of phenolic resin and polyhedral low It is made of polysilsesquioxane, which improves the carbon residue rate and oxidation resistance. However, during the process of modifying phenolic resin by hydrolyzing and polycondensing organic silicon as a precursor to generate nano-silica, the generated nano-silica It is distributed in the phenolic resin matrix in a network shape, so that the dispersibility of nano-silica in the phenolic resin is limited; ) patented technology, which is to prepare nano-silica / boron-modified phenolic resin nanocomposite materials by combining in-situ polymerization and ultrasonic-assisted dispersion methods. The thermochemical stability and rigidity of the prepared materials are improved, but the process is relatively Complex, high cost, not conducive to the realization of industrial production

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