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High-temperature nano radiation coating for heating furnace and preparation process thereof

A heating furnace and radiation coating technology, applied in the field of high temperature radiation coating, can solve the problems of short service life, limited coating wavelength range, low emissivity, etc., and achieve the effects of smooth surface, shortened heating time, and improved temperature uniformity

Active Publication Date: 2014-09-10
BDES BEIJING ENERGY SAVING TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the same type of products, there are still low emissivity, generally less than 0.85; coating thickness of 5mm; short service life, only half a year to one year; Disadvantages such as limited wavelength range of radiant heat

Method used

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  • High-temperature nano radiation coating for heating furnace and preparation process thereof
  • High-temperature nano radiation coating for heating furnace and preparation process thereof
  • High-temperature nano radiation coating for heating furnace and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (a) mixing components selected from the group consisting of: ZrO 2 , BN, SiC, MgO, La2O3, MnO 2 、Cr 2 o 3 , BeO and zircon, mix the components according to the following mass percentage composition: ZrO 2 8%, BN12%, SiC 10%, MgO42%, La 2 o 3 10%, Cr 2 o 3 5%, BeO4%, zircon 9%, mix the mixed components with water according to 1:1.5, and make slurry;

[0046] (b) Evenly paint the slurry prepared in the above steps on the mold with a thickness of 3mm, and dry it naturally for 12 hours to make thin slices, put the prepared thin slices into a calciner, calcinate at 1800°C for 3 hours, take them out and use Rapid cooling with 3KPa compressed air to obtain blanks;

[0047] (c) Put the tablet into the pulverizer for preliminary crushing, and the particle size of the obtained primary powder material is ≤5mm;

[0048] (d) Put the primary powder material into the fine grinding pulverizer for fine grinding and pulverization, put the fine pulverized material into the sievi...

Embodiment 2

[0054] (a) mixing components selected from the group consisting of: ZrO 2 , BN, SiC, MgO, La2O3, MnO 2 、Cr 2 o 3 , BeO and zircon, the components are mixed according to the following mass percentage: ZrO 2 5:%, BN15%, SiC 15%, MgO30%, La 2 o 3 14%, Cr 2 o 3 5%, BeO6%, zircon 10%, mix the mixed components with water according to 1:1.5, and make slurry;

[0055] (b) Evenly paint the slurry prepared in the above steps on the mold with a thickness of 3mm, and dry it naturally for 12 hours to make thin slices, put the prepared thin slices into a calciner, calcinate at 2200°C for 3 hours, take them out and use Rapid cooling with 3KPa compressed air to obtain blanks;

[0056] (c) Put the tablet into the pulverizer for preliminary crushing, and the particle size of the obtained primary powder material is ≤5mm;

[0057] (d) Put the primary powder material into the fine grinding pulverizer for fine grinding and pulverization, put the fine pulverized material into the sieving m...

Embodiment 3

[0064] (a) mixing components selected from the group consisting of: ZrO 2 , BN, SiC, MgO, La2O3, MnO 2 、Cr 2 o 3 , BeO and zircon, mixing said components according to the following percentage composition: ZrO 2 6%, BN12%, SiC 12%, MgO34%, La 2 o 3 15%, Cr 2 o 3 6%, BeO4%, zircon 11%, mix the mixed components with water according to 1:1.5, and make slurry;

[0065] (b) Evenly paint the slurry prepared in the above steps on the mold with a thickness of 3 mm, and dry it naturally for 12 hours to make thin slices, put the prepared thin slices into a calciner, and calcinate them at 2800°C for 5 hours, take them out Rapid cooling with 3KPa compressed air to obtain blanks;

[0066] (c) Put the tablet into the pulverizer for preliminary crushing, and the particle size of the obtained primary powder material is ≤5mm;

[0067] (d) Put the primary powder material into the fine grinding pulverizer for fine grinding and pulverization, put the fine pulverized material into the sie...

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Abstract

The invention provides a high-temperature nano radiation coating for a heating furnace and a preparation process thereof. The coating comprises radiation function powder particles, an inorganic adhesive and an expansion coefficient regulator. The preparation process comprises the following steps: preparing the radiation function powder particles, preparing the expansion coefficient regulator, synthesizing the inorganic adhesive, mixing the radiation function powder particles, the inorganic adhesive and the expansion coefficient regulator, and filtering and grinding the obtained mixture so as to obtain the high-temperature nano radiation coating for the heating furnace. The high-temperature-resistant nano radiation coating disclosed by the invention has the characteristics of capability of increasing the radiance and the thermal shock stability, energy conservation and environmental friendliness, corrosion resistance, and capability of prolonging the service life of the heating furnace and raising the temperature uniformity, and the like. The technical indexes of the products provided by the invention are as follows: a temperature of 1800 DEG C can be resisted, the radiance epsilon is greater than or equal to 0.92, the thermal shock resistance (1300 DEG C) is greater than or equal to 5 times, the thickness of the coating is 0.1-0.2 mm, and the service life is greater than or equal to 6 years.

Description

technical field [0001] The invention relates to a high-temperature radiation-resistant coating, and more particularly relates to a coating applied to an industrial heating furnace to improve the thermal efficiency of the heating furnace by increasing the radiation rate in the furnace and a preparation process thereof. Background technique [0002] In our country, the development of the national economy has entered a period of high-speed growth, the demand for industrial and civil energy has grown rapidly, and the shortage of energy has begun to restrict the development of the national economy. However, my country's energy utilization rate is only about 30%, and the unit consumption of products is 30-90% higher than that of advanced foreign countries. According to the energy consumption ratio per unit of national output, my country is three times higher than the United States and seven times higher than Japan. Obviously, energy saving and consumption reduction is an important...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 曾维芳刘廷卫谭德宽徐范王毅
Owner BDES BEIJING ENERGY SAVING TECH SERVICE
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