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

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...

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 reductive corrosion, so they cannot comprehensively realize the above function, and there are cracks, peeling, and powdering of the coating to varying degrees during use, which seriously affects the service life of the coating. At present, these problems cannot be effectively solved

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