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Inner coating for improving glazing property of turned carbon-containing fireproof material and coating method thereof

A technology for refractory materials and inner layer coatings, which is applied in the fields of anti-oxidation coatings, inner layer coatings and their coatings. It can solve problems such as the oxidation of base materials that cannot solve the glaze performance of refractory materials, so as to improve the coating effect and improve The effect of lowering firing conditions and process conditions

Active Publication Date: 2013-08-07
维苏威高级陶瓷(鞍山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It cannot solve the glaze performance of refractory materials and the oxidation of base materials, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Al after turning 2 o 3 -C refractory material sample adopts the technical scheme of the present invention for internal coating treatment.

[0040] The preparation process of the internal coating is as follows:

[0041]First, the coating is prepared according to the following mass fractions: 30% silica sol, 22% water, 0.1% methylcellulose, 4.9% clay and 43% alumina fine powder, the particle size of alumina fine powder The diameter is below 325 mesh, and the coating material is obtained after mixing evenly.

[0042] Next, brush the paint on the turned Al 2 o 3 -C refractory sample surface, and dry at 100°C for 1h.

[0043] Then, get the sample that has internal coating and the sample that does not have internal coating to carry out the coating of commercial anti-oxidation coating respectively, and dry;

[0044] Finally, the samples were fired in an air atmosphere at 1000°C for 3 hours for comparison. The surface glaze layer of the sample without the inner layer had ...

Embodiment 2

[0046] Take the turned ZrO 2 -C refractory material sample adopts the technical scheme of the present invention for internal coating treatment.

[0047] The preparation process of the internal coating is as follows:

[0048] First, the coating was prepared according to the following mass fractions: 12% silica sol, 13% water, 1% methylcellulose, 4% clay and 70% ZrO 2 Fine powder, the particle size of the fine powder is below 325 mesh, and the coating material is obtained after uniform mixing;

[0049] Next, brush the paint on the turned ZrO 2 -C refractory sample surface, and dry at 100°C for 1h.

[0050] Then, samples with inner coating and samples without inner coating were coated with commercial anti-oxidation coating and dried.

[0051] Finally, after the samples were fired in an air atmosphere at 1000°C for 3 hours, the surface glaze layer of the sample without the inner layer showed obvious pinholes, and the base material showed obvious oxidation and large-scale peeli...

Embodiment 3

[0053] Take the turned MgO-C refractory sample, adopt the technical scheme of the present invention to carry out internal coating treatment.

[0054] The preparation process of the internal coating is as follows:

[0055] First, the coating is prepared according to the following mass fractions: 37% silica sol, 30.5% water, 0.5% methylcellulose, 12% clay and 20% MgO fine powder, the fine powder particle size is 325 mesh Hereinafter, the coating material is obtained after uniform mixing.

[0056] Next, brush the paint on the surface of the turned MgO—C refractory sample, and dry it at 100° C. for 1 h.

[0057] Then, get the sample that has internal coating and the sample that does not have internal coating to carry out the coating of commercial anti-oxidation coating respectively, and dry;

[0058] Finally, after the samples were fired in an air atmosphere at 1000°C for 3 hours, obvious pinholes appeared on the glaze layer of the sample without inner layer, and the base materi...

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Abstract

The invention provides an inner coating for improving glazing property of turned carbon-containing fireproof material. The coating is prepared by uniformly mixing the following components in percentage by weight: 10-40% of bonder, 1-15% of dispersant, 10-80% of filler made of fireproof material and 10-30% of water. The components of the filler made of fireproof material are consistent to the components of the fireproof material to be turned. The coating provided by the invention mainly has the beneficial effects that the filler made of fireproof material in the using process has the effect of repairing surface pits of the carbon-containing fireproof material so as to further improve the coating of the outer antioxidant coating, so that the glazing and glaze burning condition as well as later burning effect are improved.

Description

technical field [0001] The invention relates to an inner coating for improving the glazing performance of a carbon-containing refractory material after turning and a coating method thereof, belonging to the anti-oxidation coating technology. Background technique [0002] Carbon-containing refractories are widely used in the field of iron and steel metallurgy due to their excellent slag resistance, high thermal conductivity and high thermal shock stability, such as magnesia carbon brick furnace lining, three major parts for continuous casting, etc. However, the resin carbon and graphite contained in it are easily oxidized by air at high temperature, resulting in decarburization of the product surface, which seriously affects the service life of the product. At present, in addition to adding antioxidants to the product, the method of using the surface glaze layer to isolate the air is widely used to prevent the oxidation of carbon-containing refractory materials. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/24C04B35/66
Inventor 詹姆斯·欧文斯通程相乐
Owner 维苏威高级陶瓷(鞍山)有限公司
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