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Black-increasing agent for high-temperature infrared-radiation energy-saving coating and preparation method of black-increasing agent

An energy-saving coating, high-temperature infrared technology, applied in coatings, sustainable manufacturing/processing, chemical industry, etc., can solve the problems of unstable performance and high cost of infrared radiation coatings, achieve stable radiation rate, prolong service life, excellent durability abrasive effect

Inactive Publication Date: 2013-11-06
KING STRONG MATERIAL ENG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of unstable performance and high cost of existing infrared radiation coatings, the present invention proposes a blackening agent with wear resistance, high temperature resistance and stable emissivity and its preparation method

Method used

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  • Black-increasing agent for high-temperature infrared-radiation energy-saving coating and preparation method of black-increasing agent
  • Black-increasing agent for high-temperature infrared-radiation energy-saving coating and preparation method of black-increasing agent
  • Black-increasing agent for high-temperature infrared-radiation energy-saving coating and preparation method of black-increasing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The blackening agent for high temperature infrared radiation energy-saving coatings is prepared from the following raw materials in percentage by weight:

[0029] MnO 2 : 20%, Fe 2 O 3 : 20%, CuO: 10%, Co 2 O 3 : 1%, Cr 2 O 3 : 10%,

[0030] NiO: 10%, black corundum powder: 29%.

[0031] According to needs, corundum powder can choose at least one of black corundum, brown corundum and white corundum

[0032] The preparation method of above-mentioned blackening agent, its steps are:

[0033] Step 1, the MnO 2 , Fe 2 O 3 , CuO, Co 2 O 3 , Cr 2 O 3 , NiO and corundum powder are mixed uniformly with a mixer in proportion, and then the mixture is pressed into a block.

[0034] In step 2, the above-mentioned bulk mixture is sintered at high temperature, that is, at 1350° C., sintered for 3 hours, and subjected to doping and solid solution reaction to form a blackening agent with a spinel structure.

[0035] In step 3, the sintered bulk mixture is cooled, crush...

Embodiment 2

[0037] The blackening agent for high temperature infrared radiation energy-saving coatings is prepared from the following raw materials in percentage by weight:

[0038] MnO 2 : 42%, Fe 2 O 3 : 15%, CuO: 8%, Co 2 O 3 : 5%, NiO: 10%,

[0039] Total of brown corundum and white corundum: 20%.

[0040] The preparation method of above-mentioned blackening agent, its steps are:

[0041] Step 1, the MnO 2 , Fe 2 O 3 , CuO, Co 2 O3 、Cr 2 o 3 , NiO and corundum powder are mixed evenly with a mixer in proportion, and then the mixture is pressed into a block.

[0042] Step 2: Sinter the block mixture at high temperature, that is, sinter at 1350° C. for 2 hours, perform doping and solid solution reaction to form a blackening agent with a spinel structure.

[0043] Step 3, cooling the sintered block mixture, crushing and grinding it to a size below 280 mesh, and obtaining a blackening agent for high-temperature infrared radiation energy-saving coatings. The blackening agent m...

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Abstract

The invention discloses a black-increasing agent for a high-temperature infrared-radiation energy-saving coating. The black-increasing agent is prepared by the following raw materials in percentage by weight: 20-60% of MnO2, 10-20% of Fe2O3, 1-5% of Co2O3, 5-10% of CuO, 0-10% of Cr2O3, 0-10% of NiO, and 20-40% of emery powder. The invention also discloses a preparation method of the black-increasing agent for a high-temperature infrared-radiation energy-saving coating. The black-increasing agent provided by the invention has the advantages of wear resistance, high temperature resistance and stable radiance, and is mainly used for fireproof base materials such as alumina bricks and mullite and metal base materials for boiler water wall tubes. The prepared coating has high infrared emitting ability at the temperature below 1300 DEG C within a broadband of 2.5-16.7 mum, with the average value being 0.88-0.92. The service temperature reaches up to 1450 DEG C, the black-increasing agent is stable at high temperature, the service life is not less than three years, the process is simple, and the cost is low.

Description

technical field [0001] The invention relates to the technical fields of chemical industry and coatings, in particular to a blackening agent with high infrared emissivity for high-temperature coatings and a preparation method thereof. Background technique [0002] As we all know, heat transfer occurs in three ways: conduction, convection and radiation. Radiation heat transfer plays a very important role in the high temperature stage (above 800°C), accounting for more than 80% of the total heat transfer energy. High temperature infrared energy-saving coatings can play an energy-saving role by increasing the surface emissivity of the furnace lining, increasing radiative heat transfer, and reducing heat loss without changing the structure of the industrial heating furnace. High-temperature infrared energy-saving coatings play a decisive role in metal oxides with high emissivity in the infrared band, that is, blackening agents. [0003] When the furnace lining is coated with hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12
CPCY02P20/10
Inventor 王刚赵立英
Owner KING STRONG MATERIAL ENG LTD
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