Energy-saving inner surface high-temperature radiation coating of high-temperature furnace

A technology of high temperature radiation and high temperature furnace, applied in the field of coating, to achieve the effect of stable performance, uniform coating and high bonding strength

Inactive Publication Date: 2014-04-16
TAICANG PAIOU TECH CONSULTING SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims to overcome the deficiency of the existing technology for preparing energy-saving coatings for high-temperat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1

[0017] Infrared radiation powder raw material press Cr 2 o 3 65%, NiO18%, TiO 2 4%, SiO 2 3%, Y 2 o 3 1%, ZrO 2 3%, Fe 2 o 3 2%, Nb 2 o 3 After mixing at a ratio of 4%, add the binder, suspending agent and deflocculating agent into the water step by step, stir evenly to form a slurry; then send it into the spray drying tower through a constant flow pump to make a spherical agglomerated powder with a certain particle size distribution; Finally, the powder is placed in a high-temperature furnace and sintered at a temperature of 1200 ° C for 1 hour, then quenched in water and dried, and the inner surface of the metal in the high-temperature furnace is bonded by traditional sandblasting and texturing and spraying with a thickness of ≤ 9 μm. bottom layer. Finally, the infrared radiation powder material is sprayed on the metal inner surface of the high temperature furnace by plasma spraying method.

Example Embodiment

[0018] Example 2

[0019] Infrared radiation powder raw material press Cr 2 o 3 60%, NiO22%, TiO 2 5%, SiO 2 2%, Y 2 o 3 2%, ZrO 2 4%, Fe 2 o 3 3%, Nb 2 o 3 After mixing at a ratio of 2%, gradually add into water together with binder, suspending agent and deflocculating agent, and stir evenly to form a slurry; then send it into a spray drying tower through a constant flow pump to make a spherical agglomerated powder with a certain particle size distribution; Finally, the powder is placed in a high-temperature furnace and sintered at 1080°C for 2 hours, then quenched and dried in water, and the inner surface of the metal in the high-temperature furnace is bonded by traditional sandblasting and texturing and spraying with a thickness of ≤9 μm. bottom layer. Finally, the infrared radiation powder material is sprayed on the metal inner surface of the high temperature furnace by plasma spraying method.

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Abstract

The invention discloses an energy-saving inner surface high-temperature radiation coating of a high-temperature furnace. The coating comprises infrared radiation powder, a bonding agent, a suspending agent and a deflocculation agent, and is characterized in that the infrared radiation powder comprises the following components in percentage by mass: 55%-70% of Cr2O3, 10%-22% of NiO, 0%-4% of TiO2, 0%-3% of SiO2, 0%-3% of Y2O3, 0%-6% of ZrO2, 1%-3% of Fe2O3 and 2%-5% of Nb2O3; the coating is 0.2-3 mm in thickness. The agglomerated infrared radiation powder is prepared by a paste spray-drying and milling process, and then the energy-saving inner surface high-temperature radiation coating of the high-temperature furnace is prepared by a plasma spraying process. The prepared coating is stable in performance, overcomes the shortcoming of instable performance of a conventional brushing coating at high temperature, and is good in infrared radiation performance at full waveband, high in strength of bonding with a metal base body on the surface of the high-temperature furnace and unlikely to cause cracks and drop in the using process.

Description

technical field [0001] The invention relates to a coating, in particular to a high-temperature radiation coating on the inner surface of a high-temperature furnace for energy saving. Background technique [0002] The energy consumption of thermal furnaces in my country accounts for 21% of the total energy consumption in the country. According to the 2010 national energy consumption statistics of about 3.1 billion tons of standard coal, the energy equivalent of thermal furnaces is 650 million tons of standard coal. Statistics show that the thermal efficiency of thermal furnace equipment in my country is only 40% at present, while that of foreign thermal furnaces has reached more than 50%. Therefore, my country's thermal furnaces, a traditional industry, have great energy-saving potential. However, the high-temperature furnace body is often cooled with water to prevent the furnace body from heating up due to the heat radiation of the heating element in the furnace, and damage...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 陈照峰王璐
Owner TAICANG PAIOU TECH CONSULTING SERVICE
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