Preparation method of high-emissivity energy-saving infrared radiation coating

Abstract

The invention discloses a preparation method of a high-emissivity energy-saving infrared radiation coating. The preparation method comprises steps as follows: step one, preparation of coating materials; step two, pretreatment of a base body; step three, spraying of the coating; and step four, sintering and curing of the coating. The coating is stable in structure under high-temperature sintering, performance is comprehensively promoted, the emissivity of the coating cannot be attenuated and aged during use, and the service life of the coating is longer than six years; glazing ceramic coating with a compact structure is formed on the furnace lining surface, the service life of a furnace is prolonged by more than two times, and maintenance and overhaul workload of a furnace lining, consumption of raw materials and maintenance cost are reduced.

Description

technical field [0001] The present application relates to the preparation of a novel coating, in particular to a preparation method of a high-emitting infrared energy-saving radiation coating. Background technique [0002] Existing infrared energy-saving coatings, as a new energy-saving material, are widely used in industrial furnaces. The working temperature is generally above 1000°C, because the structural materials of furnaces are usually: refractory bricks, castables, and metal furnace linings. (such as industrial boilers, power plant boilers, water walls, metal heaters, etc.) Its emissivity is low (between 0.40 and 0.50), and it needs to absorb and dissipate a large amount of heat during the heating process of the kiln, so it consumes a lot of energy. , Low heating efficiency. [0003] At present, far-infrared energy-saving coatings are widely used in China. Its technical level belongs to general materials, such as the first generation of energy-saving coatings: large ...

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Problems solved by technology

[0002] Existing infrared energy-saving coatings, as a new energy-saving material, are widely used in industrial furnaces. The working temperature is generally above 1000°C, because the structural materials of furnaces are usually: refractory bricks, castables, and metal furnace linings. (such as industrial boilers, power plant boilers, water walls, metal heaters, etc.) Its emissivity is low (between 0.40 and 0.50), and it needs to absorb and dissipate a large amount of heat during the heating process of the kiln, so it consumes a lot of energy. , low heating efficiency

[0003] At present, far-infrared energy-saving coatings are widely used in China. Its technical level belongs to general materials, such as the first generation of energy-saving coatings: large particle size (millimeter level), poor viscosity, and low energy saving; Traditional black body technology, poor bonding performance of high temperature resistance, low emissivity in high temperature area, easy aging and pulverization of the coating, and short service life (the coating will fail within 3 to 4 months)

Some coatings in the prior art are limited to use at temperatures below 600°C, and the highest limit is to use at temperatures below 1100°C, otherwise they will fall off

Moreover, the adhesion to the substrate is poor, and it is easy to fall off, especially the adhesion to the metal substrate is poor

[0004] In addition, the infrared energy-saving coatings used in the prior art have no high-temperature calcination process, and the particle size is millimeter or micron, so the emissivity is not high and unstable. As the temperature increases, the emissivity gradually decreases.

In terms of energy saving, the infrared energy-saving coatings in the prior art have an initial energy-saving rate of 3-5%. As the use time increases, the energy-saving effect gradually declines, and the energy-saving effect cannot be seen until a few months later.

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