High-temperature-resistant alkali-activated aluminosilicate binder and preparation method thereof

A technology of aluminosilicate and binder, which is applied in the field of refractory material manufacturing, can solve the problems of uneven particle size distribution, high clay content, low bonding strength, etc., and achieve small changes in linear shrinkage, prolong service life, The effect of high mechanical strength

Active Publication Date: 2021-07-09
CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD
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Problems solved by technology

According to relevant literature reports, some researchers used aluminum dihydrogen phosphate as the main component, zinc oxide and magnesium oxide as curing agents, and zirconia and silicon dioxide as fillers to prepare a high-temperature adhesive that can withstand 1500 ° C. Although the binder can be operated at high temperature, there are still deficiencies. The aluminum dihydrogen phosphate contained in the formula is not suitable for high-temperature fu

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  • High-temperature-resistant alkali-activated aluminosilicate binder and preparation method thereof
  • High-temperature-resistant alkali-activated aluminosilicate binder and preparation method thereof
  • High-temperature-resistant alkali-activated aluminosilicate binder and preparation method thereof

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preparation example Construction

[0037] A method for preparing a high-temperature-resistant alkali-activated aluminosilicate binder of the present invention comprises the following steps,

[0038] Step 1, according to the component preparation raw material of described binder, the metakaolin that weighs, silica fume and water glass, KOH, distilled water are mixed, and water glass, KOH, distilled water are used as alkali activator, so water glass and distilled water The formed system water has a mass ratio of metakaolin and silica fume of 0.5, and is mixed and stirred to obtain an aluminosilicate polymer slurry;

[0039] Step 2, then add white corundum powder, so that the solid content of the aluminosilicate polymer slurry, that is, the mass ratio of metakaolin and silica fume to white corundum powder is 1:1, and stir evenly to obtain a mixed slurry, that is, high temperature resistant Alkali activated aluminosilicate binder;

[0040] Step 3: pour the mixed slurry into a triple steel mold of 40mm×40mm×160mm, ...

Embodiment 1

[0043] Put 35 parts of metakaolin with a particle size of 1.5 μm and 7 parts of silica fume with a size of 200 nm into a stirring pot and stir evenly, then mix 5 parts of KOH, 50 parts of water glass and 10 parts of distilled water to obtain the aluminosilicate polymer Pour the slurry into a stirring pot and continue stirring with 50 parts of white corundum micropowder for 5 minutes. The obtained binder is relatively thin, and the compressive strength after curing at 90°C is 50MPa, and the flexural strength is 5.8MPa;

[0044] The bonding strength after high temperature heat treatment (850°C) is 0.95MPa, which can be used for refractory brick seam repair. Generally, the mortar seam is 0.2-0.5mm, which can solve the fine grinding of refractory bricks on the brick grinding machine, which saves labor and at the same time It can guarantee the quality and speed up the construction progress. Specific as figure 1 shown.

Embodiment 2

[0046] Put 35 parts of metakaolin with a particle size of 1.5 μm and 7 parts of silica fume with a size of 200 nm into a stirring pot and stir evenly, then mix 5 parts of KOH, 50 parts of water glass and 10 parts of distilled water to obtain the aluminosilicate polymer The slurry was poured into a stirring pot and stirred with 65 parts of white corundum micropowder for 3 minutes. The obtained binder was relatively thick, and the compressive strength after curing at 90°C was 70MPa, and the flexural strength was 8MPa.

[0047] After heat treatment at 850°C, the bonding strength of the adhesive is 1.3MPa, the flexural strength is 13MPa, the compressive strength is 91MPa, and the linear shrinkage rate is 0.25%. It can be used for repairing high-temperature-resistant materials on the outer layer of different types of high-temperature furnaces. .

[0048] After heat treatment at 1100°C, the bonding strength of the adhesive is 1.5MPa, the compressive strength is 84MPa, the flexural s...

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Abstract

The invention provides a high-temperature-resistant alkali-activated aluminosilicate binder and a preparation method thereof, wherein the binder comprises the components in parts by mass: 30-40 parts of metakaolin, 5-10 parts of silica fume, 50-70 parts of white corundum micro powder, 40-60 parts of water glass, 1-10 parts of potassium hydroxide and 10-15 parts of distilled water. The preparation method of the binder comprises the following steps: step 1, uniformly mixing the metakaolin, the silica fume, the water glass, the potassium hydroxide and the distilled water in parts by mass to obtain slurry; and step 2, adding the white corundum micro powder in parts by mass into the slurry, and uniformly mixing. The obtained high-temperature-resistant alkali-activated aluminosilicate binder is high in bonding strength, relatively good in dimensional stability after high-temperature heat treatment, low in cost, simple in preparation process and capable of being cured at room temperature, thereby widening the application range of the aluminosilicate binder.

Description

technical field [0001] The invention relates to the technical field of refractory material manufacturing, in particular to a high-temperature-resistant alkali-activated aluminosilicate binder and a preparation method thereof. Background technique [0002] The adhesive can bond the surfaces of homogeneous or heterogeneous objects together, and is especially suitable for the connection between different materials, different thicknesses and complex components. Most of the adhesives on the market are suitable for low process temperature and low bonding strength. Insufficient, it is difficult to meet complex working conditions such as high temperature and high pressure. At present, binders are mainly divided into inorganic binders (such as phosphate binders, silicate binders) and organic binders (such as epoxy resins, phenolic resins, silicones and polyimide resins). ) two categories. Although the organic binder has high bonding strength, it has low high temperature resistance,...

Claims

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Application Information

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IPC IPC(8): C04B35/63
CPCC04B35/6316C04B35/6303Y02P40/10
Inventor 樊晶王楠唐冰杰左兴刘仲军
Owner CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD
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