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A thermal radiation coating, black body technology, applied in the field of high emissivity coating, can solve the problem of no economic significance, and achieve the effects of good long-term durability, improved emissivity, and large specific surface area
Inactive Publication Date: 2014-04-09
三明市梅列区众尚圭投资管理合伙企业(有限合伙)
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Problems solved by technology
[0004] The following factors should be considered in the design of thermal radiation coatings for black bodies: relatively stable high emissivity at high temperatures; suitable particle size; thermal expansion matching with the substrate, mechanical bonding, chemical bonding, high temperature characteristics of the coating, resistance Corrosion and wear resistance; good adhesion and rheology at room temperature, easy to apply; finally there is the cost of the coating, if the cost of the coating is much higher than the planned energy recovery, then this coating is not worth any economical
Method used
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Embodiment 1
[0016] Example 1 Zinc-aluminum spinel powder 20%, chrome-aluminum spinel powder 15%, ilmenite powder 10%, boron carbide 5%, iron oxide 3%, silicon micropowder 2%, binding agent 25%, yellow dextrin 0.5%, and the rest is solvent, the coating of the present invention can be obtained by mixing thoroughly, and then use a spray gun to spray on the inner and outer surfaces of the black, and dry it at 100°C before use.
Embodiment 2
[0018] Zinc aluminum spinel powder 30%, chrome aluminum spinel powder 5%, ilmenite powder 10%, boron carbide 5%, iron oxide 3%, silicon micropowder 2%, binder 25%, yellow dextrin 0.5%, The rest is solvent, which can be mixed thoroughly to obtain the coating of the present invention, and then sprayed on the inner and outer surfaces of the black with a spray gun, and dried at 100°C before use.
Embodiment 3
[0020] Zinc aluminum spinel powder 25%, chromium aluminum spinel powder 10%, ilmenite powder 10%, boron carbide 5%, iron oxide 3%, silicon micropowder 2%, binder 25%, yellow dextrin 0.5%, The rest is solvent, which can be mixed thoroughly to obtain the coating of the present invention, and then sprayed on the inner and outer surfaces of the black with a spray gun, and dried at 100°C before use.
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Abstract
The invention discloses a thermal radiation coating for a black body, the thermal radiation coating includes a base material, an additive, a binder, a plasticizer and a solvent, the base material and the additive are selected from five or all of zinc aluminum spinel powder, chrome aluminum spinel powder, titanium iron ore powder, boron carbide, iron oxide and silicon micropowder, the binder comprises liquid aluminum dihydrogen phosphate and liquid magnesium hydrogen phosphate, the weight percentages of the base material and the additive are 6% - 75%, the weight percentage of the binder is 5% - 29%, the weight percentage of the plasticizer is 0.5% - 3%, and the rest is the solvent. The thermal radiation coating has a wide working temperature range, can be used at more than 1400 DEG C with the highest use temperature up to about 1800 DEG C, is suitable for various matrixes, is strong in matrix adhesion, is suitable for acid-base multiple atmospheres, good in long-term durability and high in thermal shock resistance capability, improves energy utilization thermal efficiency, reduces the temperature of a matrix covered with the coating, is good in wear resistance and corrosion resistance, less in environmental impact and easy to use.
Description
technical field [0001] The invention relates to a thermal radiation coating for black bodies, more precisely, relates to a high-emissivity coating that can improve the emissivity of industrialized black bodies, and can be applied to standard black bodies, industrial standard black bodies or large-scale industrial black bodies. Background technique [0002] A black body is a concept in physics, and its emissivity and absorptivity are equal to 1. In fact, a true black body does not exist. Therefore, in industrial heating, in order to improve the heating efficiency, an industrialized blackbody is often installed in the furnace. In order to maximize the emissivity of the industrialized blackbody, a high-emissivity coating is often applied inside and outside the blackbody cavity. Utilize the principle of high absorption rate and high emissivity of the coating on thermal radiation, improve the heat absorption of the furnace flame by the high-temperature blackbody cavity, improve ...
Claims
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Application Information
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