Geopolymer coating and preparation method and application thereof

A technology of geopolymer and polymer, which is applied in the field of geopolymer coating and its preparation, can solve the problems of poor surface adhesion of metal materials, large metal expansion coefficient, and affecting the thermal efficiency of kilns, so as to contribute to thermal efficiency, attachment The effect of strong force and good heat radiation performance

Active Publication Date: 2018-12-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The high-temperature far-infrared coating provided by the prior art combines well with the surface of inorganic materials (such as the inner wall of the furnace shell), but has poor adhesion on the surface of metal materials (such as the outer wall of the heating pipe)
Due to the low strength of the high-temperature far-infrared coating after curing, and the large expansion coefficient of the metal, the high-temperature far-infrared coating on the surface of the metal material is prone to cracking and falling off, which affects the improvement of the thermal efficiency of the furnace.

Method used

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  • Geopolymer coating and preparation method and application thereof
  • Geopolymer coating and preparation method and application thereof

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preparation example Construction

[0032] In the second aspect, the embodiment of the present invention provides a method for preparing the above-mentioned geopolymer coating, the method comprising: mixing copper chrome black, thermally conductive fillers, and metakaolin, and grinding for 1-3 hours to obtain component A; Mix the salt binder with water to form a binder solution to obtain component B; mix component A and component B evenly to obtain a coating.

[0033] In order to prolong the storage time of geopolymer coatings, operators usually add thickeners, dispersants, etc. to the high-temperature radiation-resistant coatings to avoid the settlement problem caused by long-term storage of the coatings. However, in the geopolymer coating provided by the embodiment of the present invention, the substances in the components are made into component A and component B respectively, and placed separately. When in use, mix component A and component B, and after stirring evenly, the paint can be applied without addin...

Embodiment 1

[0048] This embodiment provides a geopolymer coating, which is prepared using the following components in parts by weight:

[0049] 100 parts of copper chrome black, 200 parts of graphite powder, 100 parts of potassium silicate, 50 parts of metakaolin, and 500 parts of water.

[0050] Among them, the particle size of copper chromium black is 10,000 mesh, the particle size of graphite powder is 2,000 mesh, the modulus of potassium silicate is 3.0, and metakaolin is prepared by calcining ultrafine kaolin at 600°C for 3 hours and grinding to 4,000 mesh.

[0051] The geopolymer coating is prepared by the following method:

[0052] Mix copper chromium black, graphite powder, and metakaolin, and grind for 1 hour to obtain component A in powder form with a particle size of 2000 mesh.

[0053] Potassium silicate is mixed with water to form a binder solution to obtain the B component.

[0054] Mix components A and B evenly to obtain a geopolymer coating.

Embodiment 2

[0056] This embodiment provides a geopolymer coating, which is prepared using the following components in parts by weight:

[0057] 100 parts of copper chrome black, 100 parts of graphene powder, 100 parts of aluminum silicate, 200 parts of sodium silicate, 150 parts of metakaolin, and 1000 parts of water.

[0058] Among them, the particle size of copper chromium black is 5000 mesh, the particle size of graphene powder is 10000 mesh, the modulus of aluminum silicate and sodium silicate is 3.5, and the metakaolin is calcined at 1500 ℃ for 1 hour by ultrafine kaolin, and ground to 1500 Prepared.

[0059] The geopolymer coating is prepared by the following method:

[0060] Mix copper chrome black, graphene powder, and metakaolin, and grind for 2 hours to obtain component A in powder form with a particle size of 10,000 mesh.

[0061] Mix aluminum silicate, sodium silicate and water to form a binder solution to obtain component B.

[0062] Mix components A and B evenly to obtain...

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Abstract

The invention discloses geopolymer coating and a preparation method and an application thereof which belong to the field of high temperature resistant coating. The geopolymer coating is prepared from,by weight, the following components: 100 parts of copper chromite black, 1-200 parts of a thermal conductive filler, 100-500 parts of a silicate binder, 10-150 parts of metakaolin, and 100-1000 partsof water. A geopolymer is formed through a reaction of the copper chromite black, the metakaolin and the silicate binder; the geopolymer coating provided by embodiments of the invention employs the advantages of high strength in geopolymer, good chemical corrosion resistance, high temperature resistance and durability; and therefore, the coating can be firmly adhered to the surface of a metal material without cracking or falling off due to expansion of metal, thereby prolonging the service life of the coating, and the thermal efficiency of a kiln is improved for a long time.

Description

technical field [0001] The invention relates to the field of high-temperature-resistant coatings, in particular to a geopolymer coating and its preparation method and application. Background technique [0002] Industrial kilns are usually made of refractory materials such as high alumina bricks, clay bricks, castables, and ceramic fibers. Heating pipes are arranged on the side walls of the shells. When liquid materials need to be heated, the liquid enters the heating pipes to heated to a predetermined temperature. During the working process of the kiln, its shell and heating pipes will participate in the radiative heat exchange process, which directly affects the heating efficiency of the kiln. In order to make the liquid to be heated reach the predetermined temperature as soon as possible, a layer of high temperature resistant radiation coating can be coated on the inner wall of the shell or the outer wall of the heating pipe, so as to improve the thermal efficiency of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3243C04B2235/3418C04B2235/3427C04B2235/3463C04B2235/349C04B2235/425
Inventor 周建伟李春漫董连江丁鹤铭田胜杰田瑞朋常维纯郭海峰
Owner PETROCHINA CO LTD
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