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Oxidation resistance coating material for continuous casting function fire resistance material

An anti-oxidation coating and refractory technology, applied in the field of refractory materials, can solve the problems of peeling of the glaze layer, high cost, bulging, etc., and achieve the effect of preventing high-temperature oxidation, simple production process and good adhesion

Active Publication Date: 2013-01-09
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process avoids the high cost of dust in carbon embedding treatment and atmosphere protection. However, due to the fact that the binder will volatilize some organic gases during the firing process of carbon-containing refractory materials, it often causes peeling and bulging of the glaze layer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The functional refractory material involved in this embodiment is an aluminum-carbon plug rod for continuous casting with a carbon content of 10%. The raw material components and mass percentages of the anti-oxidation coating are: 25% potassium feldspar, 15% pyrophyllite, 50% borax, silica 10%, the dispersant sodium tripolyphosphate is 0.25% of the total weight of the above raw materials; after weighing the powder, pre-mix it in the mixing tank for 5 minutes, add the dextrin solution with a concentration of 18%, stir and mix to form a uniform Slurry. The weight ratio of the powder to the binder dextrin solution is 2:1; the prepared slurry is evenly brushed on the surface of the aluminum carbon stopper at room temperature, and the thickness of the coating is controlled between 0.3mm and 0.4mm. After drying under natural conditions for 2 hours, move it into the drying room and slowly raise the temperature to 110°C for 2 hours, then put it into a kiln and burn it in an air...

Embodiment 2

[0022] The functional refractory material involved in this example is a submerged nozzle for continuous casting with a carbon content of 28%. The raw material components and mass percentages of the anti-oxidation coating are: 30% potassium feldspar, 12% pyrophyllite, 47% borax, and 11% silica %, the addition of sodium tripolyphosphate is 0.1% of the total weight of the above raw materials; after weighing the powder, pre-mix in the mixing tank for 5 minutes, add dextrin solution with a concentration of 22%, stir and mix to form a uniform slurry . The weight ratio of powder to binder dextrin solution is 1:0.8. Place the submerged nozzle in the prepared slurry pool and dip it evenly. The thickness of the coating is controlled between 0.3mm and 0.4. After drying for 2 hours under natural conditions, move it into the drying room and slowly heat up to 100°C for drying for 2 hours. Hours, put it into a kiln and fire it in an air atmosphere at 1100°C for 4 hours. After the firing is...

Embodiment 3

[0024] The functional refractory material involved in this example is a protective sleeve for continuous casting with a carbon content of 22%. The formula of the anti-oxidation coating is: 25% potassium feldspar, 17% pyrophyllite, 53% borax, 5% silica, dispersed Sodium tripolyphosphate is 0.2% of the total weight of the above raw materials. After weighing the powder, pre-mix in the mixing tank for 5 minutes, add 20% dextrin solution, and stir to form a uniform slurry. The weight ratio of powder to binder dextrin solution is 1:1. Put the protective sleeve into the prepared slurry pool and dip it evenly. The thickness of the coating is controlled between 0.3mm and 0.4. After drying for 2 hours under natural conditions, move it into the drying room and slowly heat up to 85°C for drying for 2 hours. Hours, put it into a kiln and fire it in an air atmosphere at 1200°C for 4 hours. After the firing is completed, a smooth enamel protective layer about 0.3mm thick is formed on the su...

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Abstract

The present invention belongs to the technical field of fire resistance materials, and mainly relates to an oxidation resistance coating material for a continuous casting function fire resistance material. According to the coating material, a carbon-containing material is coated with an oxidation resistance coating after forming, and the coated carbon-containing material is subjected to drying and sintering to obtain an oxidation resistance coating material, wherein a loose and porous structure is formed after coating and drying. The raw material components of the oxidation resistance coatingmaterial comprise, by mass, 25-30% of potassium feldspar, 12-17% of pyrophyllite, 47-53% of borax, 5-11% of silica, and a dispersing agent, wherein the weight of the dispersing agent is 0.1-0.25% of the total weight of the potassium feldspar, the pyrophyllite, the borax and the silica. The raw materials and the dispersing agent are mixed and uniformly stirred; the resulting mixture and a binder are placed in a ball mill according to a ratio of 2:1-1:1 to uniformly mix to form the coating material; the coating material is coated on the surface of the formed function fire resistance material toform the coating. The oxidation resistance coating material of the present invention does not peel and bubble during the sintering process along with the fire resistance material, and finally a smooth, uniform and compact glaze layer is formed on the surface of the carbon-containing fire resistance material, such that the purpose of prevention of the carbon-containing fire resistance material from oxidation is achieved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and mainly relates to an anti-oxidation coating for continuous casting functional refractory materials. Background technique [0002] In the continuous casting process of molten steel, the functional refractory materials involved include protective sleeves, stopper rods, and submerged nozzles. In the continuous casting process, these functional refractory materials have to withstand a large thermal shock. Because graphite has a high thermal conductivity and the characteristics of non-wet contact with steel slag, functional refractory materials for continuous casting are often added graphite to improve its resistance. Thermal shock capability, thereby maintaining the structural integrity of the material during continuous casting. During the continuous casting process, part of the above-mentioned functional refractory materials is exposed to high-temperature air, and the graphite in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C04B35/66
Inventor 于建宾马天飞刘国齐杨文刚阎广周魏昌晟王建国
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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