High alumina refractory coating material

A smear, high-alumina technology, applied in the field of high-alumina refractory smear, can solve the problems of large one-time and maintenance and replacement investment, affecting the firing effect of the kiln, and intensifying the heat dissipation of the kiln, and achieves a good repair effect. Short maintenance time and improved service life

Active Publication Date: 2015-09-16
RUNTAI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The lining of high-temperature kilns is often built with light materials to achieve high temperature resistance, thermal insulation, and thermal spalling resistance, but it is expensive and requires a lot of investment in one-time and maintenance replacement.
The

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0010] Example 1

[0011] A high-alumina refractory coating material, which includes the following components in parts by weight: 3-1mmA85 lightweight alumina aggregate 30-40 parts, 1-0mm alumina hollow spheres 5-15 parts, 0.5-0mm lightweight 10-20 parts of mullite, 11-21 parts of mullite powder, 4-6 parts of modified soil, 5-7 parts of aluminate cement, 1-3 parts of mullite 1-5μm whiskers, nitrided 1-3 parts of titanium 1-5μm whiskers, 3-5 parts of additives, plus 10-18% of the above-mentioned total weight of aluminum sol; additives are magnesium calcium potassium sulfate powder, silicon powder and zirconium carbonate powder, the weight ratio of which is 1 :1:1; the density of the aluminum sol is 1.1g / ml, and the pH is 4.5. In the above ingredients, the aluminum sol can be replaced with an equal weight of silica sol. The aluminum content of the aluminate cement is more than 50%. According to the above formula ingredients, first dry mix uniformly in a mixer, then add 10-18% al...

Example Embodiment

[0012] Example 2

[0013] A high-alumina refractory coating material, which includes the following components in parts by weight: 3-1mmA85 light alumina aggregate 40 parts, 1-0mm alumina hollow spheres 7 parts, 0.5-0mm light mullite 10 Parts, 21 parts of mullite powder, 4 parts of modified method soil, 7 parts of aluminate cement, 3 parts of mullite 1-5μm whiskers, 3 parts of titanium nitride 1-5μm whiskers, 5 parts of additives, plus The aluminum sol accounts for 10% of the total weight; the additives are magnesium calcium potassium sulfate powder, silicon micropowder and zirconium carbonate powder with a weight ratio of 1:1:1; the aluminum sol has a density of 1.1 g / ml and a pH of 4.5. The aluminate cement is pure calcium aluminate cement. According to the above formula ingredients, first dry mix in a mixer, and then add 15% aluminum sol. After the wet mix is ​​uniform, the material is discharged and smeared to the cracks or pits of the original furnace lining with tools such...

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Abstract

The invention relates to a high alumina refractory coating material and in particular relates to a corundum light refractory coating material. The high alumina refractory coating material comprises the following components in parts by weight: 30-40 parts of 3-1mm A85 light alumina aggregate, 5-15 parts of 1-0mm alumina hollow balls, 10-20 parts of 0.5-0mm light mullite, 11-21 parts of mullite powder, 4-6 parts of modified Faku soil, 5-7 parts of aluminate cement, 1-3 parts of 1-5mu m mullite whiskers, 1-3 parts of 1-5mu m titanium nitride whiskers, 3-5 parts of additives and additional alumina sol accounting for 10-18% of the total above materials by weight. The high alumina refractory coating material has good coating property and sintering property and short curing time and can be rapidly baked and used. After undergoing high-temperature thermal treatment, the coating material can be sintered together with furnace linings, has high strength and good thermal shock resistance, is not easy to crack, has good repair effects and can achieve the effect of effectively prolonging the service lives of high-temperature furnaces.

Description

technical field [0001] The invention relates to a high-alumina refractory coating material, in particular to a high-alumina light-weight refractory coating material. Background technique [0002] The lining of high-temperature kilns is usually built with light materials to achieve high temperature resistance, thermal insulation, and thermal spalling resistance. However, it is expensive and requires a large investment in one-time and maintenance replacement. The strength of lightweight refractory materials is not as good as that of dense refractory materials. Therefore, in use, lightweight refractory linings are often cracked and broken by external impacts such as kiln cars or products burned on kiln cars, which leads to increased heat dissipation of the kiln and affects the kiln. Furnace firing effect. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a refractory smear material that is easy to smear, good si...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/103C04B35/66C04B35/80C04B2235/3418C04B2235/3463
Inventor 张婷
Owner RUNTAI CHEM CO LTD
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