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A kind of graphene refractory material preparation method for nozzle

A graphene refractory material and graphene powder technology, applied in the field of graphene refractory material preparation, can solve problems such as improving the working life of the nozzle, prolonging the thermal shock resistance time, and not innovating the thermal shock resistance principle.

Active Publication Date: 2021-05-25
JIANGSU TAIRUI REFRACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above two schemes lay a layer of smooth and dense glaze on the surface of the nozzle body, which is equivalent to strengthening the nozzle body and prolonging the thermal shock resistance time of the body. There is no innovation in the principle of thermal shock resistance, so it is impossible to The working life of the nozzle is significantly and effectively improved

Method used

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  • A kind of graphene refractory material preparation method for nozzle

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Effect test

Embodiment 1

[0035] The preparation method of the graphene refractory material that the present embodiment provides for shroud comprises the following steps:

[0036] (1) First prepare the heat conducting layer: mix 100 parts of graphite powder, 5 parts of graphene powder, 10 parts of titanium carbide, 7 parts of tungsten carbide, and 15 parts of binder methyl cellulose, and then add the above raw materials 2 times the sum of water, use an ultrasonic disperser to evenly disperse all raw materials in water, and then evenly coat the working surface of the long nozzle with a coating thickness of 20 microns; dry at 150°C after coating; graphite powder Body and graphene powder were passed through a 300 mesh sieve before mixing.

[0037] (2) Then prepare the ceramic film protective layer: Al 2 o 3 : 40 copies; Si 3 N 4 : 10 parts; Binder methylcellulose: 3 parts; Lubricant liquid paraffin: 0.5 part; Dispersant terpineol: 0.5 part; Water: 15 parts Mix evenly and apply to the heat conducting l...

Embodiment 2

[0041] The preparation method of the graphene refractory material that the present embodiment provides for shroud comprises the following steps:

[0042] (1) First prepare the heat conduction layer: mix 100 parts of graphite powder, 6 parts of graphene powder, 11 parts of titanium carbide, 8 parts of tungsten carbide, and 18 parts of binder hydroxypropyl methylcellulose, and then add mass Water that is 2.5 times the sum of the above raw materials, use an ultrasonic disperser to evenly disperse all the raw materials in water, and then evenly coat the working surface of the long nozzle with a coating thickness of 50 microns; dry at 160°C after coating ; The graphite powder and the graphene powder are respectively passed through a 200-mesh sieve before mixing.

[0043] (2) Then prepare the ceramic film protective layer: Al 2 o 3 : 45 copies; Si 3 N 4 : 12 parts; binder hydroxypropyl methylcellulose: 4 parts; lubricant corn oil: 0.8 part; dispersant triethanolamine: 1 part; O...

Embodiment 3

[0047] The preparation method for the graphene refractory material that the present embodiment provides for submerged nozzle comprises the following steps:

[0048] (1) First prepare the heat conducting layer: mix 100 parts of graphite powder, 7 parts of graphene powder, 12 parts of titanium carbide, 9 parts of tungsten carbide, and 20 parts of binder methyl cellulose, and then add one of the above raw materials and 3 times of water, use an ultrasonic disperser to evenly disperse all raw materials in water, and then evenly coat on the working surface of the submerged nozzle with a coating thickness of 30 microns; dry at 180°C after coating; graphite powder Body and graphene powder were passed through a 200 mesh sieve before mixing.

[0049] (2) Then prepare the ceramic film protective layer: Al 2 o 3 : 50 copies; Si 3 N 4 : 15 parts; binder hydroxypropyl methylcellulose: 5 parts; lubricant liquid paraffin: 1 part; dispersant terpineol: 2 parts; water: 20 parts, mixed evenl...

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Abstract

The invention provides a method for preparing a graphene refractory material for a nozzle, comprising the following steps: (1) first preparing a heat conducting layer: mixing graphite powder, graphene powder, titanium carbide, tungsten carbide, and a binder , evenly coated on the working surface of the long nozzle or submerged nozzle (2) and then prepare the ceramic film protective layer: Al 2 o 3 、Si 3 N 4 , binder, lubricant, dispersant, and water are evenly mixed and applied on the heat conducting layer prepared in step (1); (3) low-temperature calcination; (4) high-temperature calcination. The invention uses the high thermal conductivity of graphite and graphene to quickly disperse the thermal shock of molten steel in the entire long nozzle or submerged nozzle body, avoiding heat accumulation in the local area of ​​the nozzle, so that all parts of the nozzle can maintain a stable and firm internal structure , there is no weak area, thus improving the working time of the nozzle as a whole.

Description

technical field [0001] The invention relates to the technical field of functional refractory materials, in particular to a method for preparing a graphene refractory material used in nozzles. Background technique [0002] Functional refractory components such as integral stopper, long nozzle (large ladle long nozzle), submerged nozzle (tundish nozzle), and tundish nozzle are collectively referred to as the three major components of continuous casting. The main materials are aluminum carbon, aluminum zirconium carbon, magnesium carbon or magnesium aluminum spinel carbon, and the molding method is isostatic pressing. [0003] Among them, the long nozzle means that when the molten steel is poured from the ladle to the tundish, in order to avoid oxidation and splashing, a long nozzle is installed at the lower end of the sliding nozzle at the bottom of the ladle, one end is connected with the lower nozzle, and the other end is inserted into the molten steel in the tundish for sea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/622C04B35/528B22D41/54C03C8/00C04B41/86
Inventor 吴建湘吴佩霞薛文东
Owner JIANGSU TAIRUI REFRACTORY
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