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Waterproof coating of carbon-containing refractory material

A refractory material and waterproofing technology, which is applied in the field of carbon-containing refractory materials to achieve excellent waterproofing effect

Inactive Publication Date: 2011-08-31
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: on the basis of the existing anti-oxidation coating, provide a waterproof coating to protect the existing coating from being hydrated, thereby protecting the carbon-containing refractory material from being oxidized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] An aluminum-carbon sample with a carbon content of more than 20%, with a size of Φ100×100mm, is coated with an anti-oxidation coating with water glass as a binder. The preparation method of the waterproof coating is as follows: pour 6Kg of alumina micropowder, 1Kg of white corundum powder, 0.5Kg of kyanite powder, and 2.5Kg of silica sol into a container, and mix thoroughly to obtain 10Kg of carbon-containing refractory material waterproof coating.

[0016] Divide the above aluminum-carbon samples coated with anti-oxidation coating into two groups for comparative test, one group is coated with waterproof coating, and the other group is not coated. After completion, move it into a drying oven to dry at 80-120°C for 2-4 hours, take out the sample and let it cool to room temperature, and then soak it in water for 1-2 hours. Take out the sample and observe, it is found that only the sample coated with anti-oxidation coating, the coating has completely peeled off and dissolv...

Embodiment 2

[0018] The preparation method of the waterproof coating is as follows: pour 2.5Kg of alumina micropowder, 2.5Kg of white corundum powder, 1Kg of kyanite powder, and 4Kg of silica sol into a container, and mix well to obtain 10Kg of carbon-containing refractory material waterproof coating.

[0019] The test of Example 1 was repeated using the waterproof coating of Example 2 of the present invention, and the results showed that the waterproof coating of Example 2 had an obvious waterproofing effect.

Embodiment 3

[0021] The preparation method of the waterproof coating is as follows: pour 1Kg of alumina micropowder, 6Kg of white corundum powder, 1.5Kg of kyanite powder, and 1.5Kg of silica sol into a container, and mix thoroughly to obtain 10Kg of carbon-containing refractory material waterproof coating.

[0022] Use the waterproof coating of Example 3 of the present invention to paint the part of the submerged nozzle for continuous casting that contacts the castable (this part has been covered with an anti-oxidation coating), and compare it with the part of the submerged nozzle that is only covered with an anti-oxidation coating. The results show that after the immersion nozzle is used for 8-12 hours, the thickness of the decarburized oxide layer is 8-12mm when the part is only covered with anti-oxidation coating; while the coating with anti-oxidation and waterproof coating does not have any decarburization and oxidation phenomenon. , The waterproof coating forms a hard shell of alumina...

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Abstract

The invention relates to a carbon-containing refractory material technology, in particular to a waterproof coating of a carbon-containing refractory material. The waterproof coating is used for preventing a carbon-containing refractory material from being oxidized when being baked and used due to invalidation of an anti-oxidization coating caused by water and water vapor. The waterproof coating provided by the invention comprises the following components in percentage by weight: 10-60% of alumina micro powder, 10-60% of white alundum powder, 5-15% of kyanite powder and 15-40% of silica sol. All the components are uniformly coated on the anti-oxidization coating after being uniformly mixed. The coating does not crack or peel off in the heating process, forms an aluminum oxide ceramic shell at high temperature, prevents water from corroding the anti-oxidization coating and has a good waterproof effect.

Description

technical field [0001] The invention relates to the technology of carbon-containing refractory materials, in particular to a waterproof coating for carbon-containing refractory materials. Background technique [0002] The "three major parts" of continuous casting are submerged nozzles, integral stoppers, and long nozzles, which are functional refractory materials for iron and steel metallurgy. Oxidation and splashing when entering the mold from the tundish, reducing the oscillation of the molten steel surface and the turbulence inside the mold. [0003] Submerged nozzles are usually made of carbon-containing refractory materials. Due to the presence of graphite carbon, the carbon in the nozzle is easily oxidized under high temperature, which will cause damage to the structure of carbon-containing refractory materials, reduce its service life, and even cause product failure. Perforation, fracture and other accidents. In order to avoid this kind of situation, it is often to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/66
Inventor 杨立强闫广周黄辉张晖程瑛刘国齐王建国俱彦国田锋张立明
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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