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A preparation method of graphene ceramic film for metallurgical nozzle

A technology of ceramic membrane and graphene, which is applied in the field of preparation of graphene ceramic membrane, can solve the problems of no innovation in the principle of thermal shock resistance, failure to improve the working life of the nozzle, and prolong the thermal shock resistance time.

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

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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 preparation method of graphene ceramic film for metallurgical nozzle

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033]The preparation method of the graphene ceramic membrane for long water provided in this example includes the steps of:

[0034](1) First, the thermal heat layer is prepared: the graphite powder, graphene powder, and adhesive methylcellulose are mixed according to the mass ratio of 1: 0.03: 0.1, then the mass is 1.5 times the water of the three. Uniformly disperse all raw materials in water using an ultrasonic dispersion, and then applied to the working surface of the long water port, the coating thickness is 50 microns; after coating at 180 ° C; the graphite powder, graphite powder Both are commercially available industrial grade products, more than 200 mesh sieves before mixing.

[0035](2) The ceramic membrane protective layer is then prepared: will Al2O3: 40 copies; Si3N4: 7 copies; TIC: 3 copies; WC: 3 copies; adhesive methylcellulose: 5 parts; lubricant corn oil: 1 part; dispersant triethanolamine: 1 part; water: 25 parts mixed after mixing The heat conductive layer obtained by...

Embodiment 2

[0039]The preparation method of the graphene ceramic membrane for long water provided in this example includes the steps of:

[0040](1) First, the thermal heat layer is prepared: the graphite powder, graphene powder, and binder hydroxypropylmethylcellulose are mixed according to the mass ratio of 1: 0.05: 0.15, and then the mass is twice the sum of the three. Water, use ultrasonic disperser to uniformly disperse all raw materials in water, then applied to the working surface of the long water port, the coating thickness is 20 microns; after coating at 150 ° C; the graphite powder, graphite Elen powder is a commercially available industrial grade product, and 400 mesh sieves before mixing.

[0041](2) The ceramic membrane protective layer is then prepared: will Al2O3: 45; Si3N4: 8 copies; TiC: 4 copies; WC: 4 copies; binder hydroxypropylmethylcellulose: 7 parts; lubricant liquid paraffin: 2 parts; dispersant polypropylene: 2 parts; water: 28 parts of mixing After being applied to the ther...

Embodiment 3

[0045]The preparation method of graphene ceramic membrane for immersing moisture provided in this embodiment includes the following steps:

[0046](1) First, the thermal layer is prepared: the graphite powder, graphene powder, and binder hydroxypropyl methylcellulose are mixed according to the mass ratio of 1: 0.08: 0.2, and then the mass is three times the sum of the three. Water, use ultrasonic dispersor to uniformly disperse all raw materials in water, then applied to the working surface of the immersion moisture, coating thickness of 30 microns; after coating at 160 ° C; the graphite powder, The graphene powder is a commercially available industrial grade product, which is 300 mesh sieves before mixing.

[0047](2) The ceramic membrane protective layer is then prepared: will Al2O3: 50 copies; Si3N4: 10 copies; TiC: 5 copies; WC: 5 parts; binder hydroxypropylmethylcellulose: 10 parts; lubricant liquid paraffin: 3 parts; dispersant Polyethylene glycol: 3 parts; water: 30 parts After mix...

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Abstract

The invention provides a method for preparing a graphene ceramic membrane used in a metallurgical nozzle, comprising the following steps: (1) firstly prepare a heat conducting layer: mix graphite powder, graphene powder and binder, and evenly coat On the working surface of the long nozzle or submerged nozzle; (2) Then prepare the ceramic film protective layer: Al 2 o 3 、Si 3 N 4 , TiC, WC, 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 present invention relates to the field of functional refractory materials, and more particularly to a method for preparing a graphene ceramic membrane for metallurgy.Background technique[0002]Whole plug stick, long water port (large bag long water port), immersion water exit (in the water port used in the package), medium-tech water, etc., collectively referred to as a three major parts of continuous casting. Its material mainly has aluminum carbonaceous, aluminum zirconium carbonaceous, magnesium carbonaceous or magnesium-aluminum spinel carbonation, and the molding method are used for static pressure molding.[0003]Among them, the long water port refers to when the steel is poured from the steel bag, in order to avoid oxidation and splash, the long water port is mounted at the bottom of the sliding water in the bottom of the steel bag, and one end is connected to the lower water, and the other end is inserted into the molten steel water in the middle. Prote...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/89C03C8/00B22D41/54
Inventor 吴建湘吴佩霞薛文东
Owner JIANGSU TAIRUI REFRACTORY
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