Boiler water cooling wall high-temperature anti-corrosion anti-staining anti-slagging ceramic coating material

A technology of ceramic coatings and water-cooled walls, applied in the field of coatings, can solve the problems that affect the service life of the coating, cannot solve the problems of high contamination and high-temperature corrosion reductive corrosion, coating cracking, etc., and achieve long service life and low surface energy , the effect of preventing contamination and slagging

Inactive Publication Date: 2019-01-25
北京泽马新技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new type of functional material, ceramic coatings can also play a role in high temperature corrosion resistance and emissivity improvement, but the ceramic coatings in the prior art cannot solve the problems of high contamination and high temperature corrosion, especially red

Method used

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  • Boiler water cooling wall high-temperature anti-corrosion anti-staining anti-slagging ceramic coating material
  • Boiler water cooling wall high-temperature anti-corrosion anti-staining anti-slagging ceramic coating material
  • Boiler water cooling wall high-temperature anti-corrosion anti-staining anti-slagging ceramic coating material

Examples

Experimental program
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Effect test

Embodiment 1

[0045] 1) Preparation of binder liquid: slowly add 35 parts of aluminum dihydrogen phosphate into 15.88 parts by mass of water, and stir for 10-20 minutes.

[0046] 2) Preparation of filler mixture: 27.5 parts by mass of synthetic mullite, 9.9 parts by mass of corundum powder, 1.5 parts by mass of pure calcium aluminate micropowder, 3.2 parts by mass of activated alumina micropowder, 1.8 parts by mass of silicon micropowder , 3.0 parts by mass of expansion agent (andalusite), 2.0 parts by mass of sintering agent (spodumene), 0.10 parts by mass of water reducer (composite phosphate), 0.12 parts by mass of anti-knock agent (organic fiber) are mixed in the ball mill Grind until the fineness reaches ≤5 μm.

[0047] 3) Add the filler mixture to the binder liquid, then add 0.7 part of dispersant, 0.2 part of wetting agent, and 0.5 part of defoamer, stir at 1000 rpm for 40 minutes, mix evenly and filter before packaging.

[0048] Examples 2 to 9, the proportions are shown in Table 7...

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Abstract

The invention provides a boiler water cooling wall high-temperature anti-corrosion anti-staining anti-slagging ceramic coating material, a preparation method and applications thereof, and belongs to the technical field of special coating materials, wherein the ceramic coating material comprises, by mass, 45-51.2% of a filler, 35% of a binder, 5.22% of an additive, 1.22% of an auxiliary agent, andthe balance of water, and the filler comprises 27.5% of synthetic mullite, 9.9% of corundum powder, 1.5-2.7% of pure calcium aluminate micro-powder, 1.9-4.5% of active alumina micro-powder, 1.8-3.6 ofsilicon micro-powder, and 3% of a rare earth oxide. The preparation method comprises: adding water to a binder, mixing to obtain a binder liquid, carrying out grinding refining treatment on a fillerto achieve a particle size of less than or equal to 5 [mu]m, adding the treated filler into the binder liquid, adding an auxiliary agent, uniformly stirring, filtering, and encapsulating. According tothe present invention, the outer surfaces of boiler water cooling wall furnace pipes and heating furnace pipes can be coated with the obtained coating material to form ceramic coatings.

Description

technical field [0001] The invention belongs to the technical field of coatings, and provides a high-temperature anti-corrosion, anti-contamination, and anti-slagging ceramic coating for boiler water walls and a preparation method thereof. Background technique [0002] In the production and operation of power station boilers, petroleum and petrochemical heating furnaces, and small and medium-sized industrial boilers, the contamination and slagging of pulverized coal boilers (including fuel gas heating furnaces) has caused great hidden dangers to the safe operation of boilers, and at the same time affects the efficiency of boilers and heating furnaces. Under the action of high-temperature flue gas, the ash and slag bonded to the water wall or high-temperature superheater and the furnace tube of the heating furnace will undergo complex chemical reactions with the tube wall to form high-temperature corrosion, contamination, and slagging, which are generally considered to be high...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/626F23M5/08
CPCC04B35/62222C04B35/62605C04B35/66C04B2235/3203C04B2235/3208C04B2235/3217C04B2235/3222C04B2235/3225C04B2235/3229C04B2235/3418C04B2235/3463C04B2235/3472C04B2235/447C04B2235/9669F23M5/08
Inventor 崔悦
Owner 北京泽马新技术有限公司
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