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Inner liner material for industrial kiln furnace

An industrial kiln and lining technology, applied in the direction of integral lining, etc., can solve problems such as inability to be applied directly and conveniently, and achieve the effects of good hydrophobic exhaust performance, increased heat storage function, and improved elongation.

Active Publication Date: 2014-07-30
四川科达节能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional blackbody model cannot be directly and conveniently applied in engineering practice

Method used

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  • Inner liner material for industrial kiln furnace
  • Inner liner material for industrial kiln furnace
  • Inner liner material for industrial kiln furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The method for preparing the high-emissivity coating is: 15% silica sol, 10% zirconium silicate, 25% chromium oxide, 20% manganese dioxide, 15% iron oxide , 10% magnesium oxide and 5% rare earth are mixed and ground evenly and placed in a box-type high-temperature furnace at 1200 ° C for 2 hours, then poured into cold water to quench the material, and then wet ball milled in a planetary ball mill for 6 hours, adding distilled water Adjust the viscosity of the slurry to be moderate, stir for 3 hours to mix evenly, and age for 24 hours to obtain a high-emissivity coating.

Embodiment 2

[0028]The method for preparing the high-emissivity coating is: the mass percentage is 14% silica sol, 9% zirconium silicate, 24% chromium oxide, 21% manganese dioxide, 16% iron oxide , 11% magnesium oxide and 5% rare earth are mixed and ground evenly and placed in a box-type high-temperature furnace at 1200 ° C for 2 hours, then poured into cold water to quench the material, and then wet ball milled in a planetary ball mill for 6 hours, adding distilled water Adjust the viscosity of the slurry to be moderate, stir for 3 hours to mix evenly, and age for 24 hours to obtain a high-emissivity coating.

Embodiment 3

[0030] The method for preparing the high-emissivity coating is: the mass percentage is 16% silica sol, 11% zirconium silicate, 26% chromium oxide, 19% manganese dioxide, 14% iron oxide , 9% magnesium oxide and 5% rare earth are mixed and ground evenly, and then placed in a box-type high-temperature furnace at 1300 ° C for 2 hours, then poured into cold water to quench the material, and then wet ball milled in a planetary ball mill for 6 hours, adding distilled water Adjust the viscosity of the slurry to be moderate, stir for 3 hours to mix evenly, and age for 24 hours to obtain a high-emissivity coating.

[0031] Many high-efficiency and energy-saving prefabricated parts are installed on the furnace roof and furnace wall of the industrial furnace; the expansion of the furnace wall is greatly improved, and the heat transfer area is more than doubled; in addition, the inner wall of the cavity is coated with a high emissivity layer, so that The emissivity is between 0.92 and 0.96...

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Abstract

The invention discloses an inner liner material for an industrial kiln furnace. The inner liner material comprises a base body and a high-emissivity coating, wherein the base body is a prefabricated element with a semi-sealed cavity and is formed through adding 10 percent of explosion-proof fiber into high-temperature fire-resistance materials, carrying out sufficient stirring and carrying out sintering or casting. The explosion-proof fiber starts to soften, contract and melt after reaching a certain temperature in the sintering process along with the prefabricated element, finally, a plurality of irregular micro holes are formed, antioxidant and sintering agents are brushed and coated on the inner wall of the semi-sealed cavity of the prefabricated element, then, bonding agents are coated, next, the high-emissivity coating with the thickness being 0.2 to 2mm is sprayed and coated, natural drying in the shade is carried out at room temperature, finally, high-temperature heating solidification is carried out, the heating speed is 10 DEG C / min, the sintering is completed after heat insulation for 5 hours at 1300 DEG C, and black body sources are formed. The inner liner material has the advantages that the heat storage function is strong, the radiance is high, the heat transfer area of a furnace hearth can be greatly increased, the furnace liner inner wall blackness and the irradiance can also be improved, the temperature uniformity of the furnace hearth is improved, and the service life of the furnace is prolonged.

Description

technical field [0001] The invention relates to a lining material, in particular to an industrial furnace lining material. Background technique [0002] In view of the fact that strategic emerging industries are in a period of rapid change, the energy-saving transformation of industrial furnaces, which are large energy consumers, is also imminent. At present, there are some energy-saving technologies in application: use refractory fibers to paste on the furnace lining to reduce heat loss. But this technique just keeps the heat inside the furnace. It cannot solve the in place rate of heat rays, and because the emissivity of refractory fiber is not high, and it decreases with the increase of temperature in the furnace. Therefore, the energy saving rate is not high; the inner wall of the furnace is sprayed to save energy. This method can increase the radiation intensity to a certain extent, but it cannot increase the heat transfer area, nor can it control the heat rays, and ...

Claims

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Application Information

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IPC IPC(8): F27D1/10
Inventor 李理
Owner 四川科达节能技术有限公司
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