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A kind of preparation method of lightweight high infrared emissivity coating and its application

A technology of infrared emissivity and coatings, applied in the field of high-temperature kiln coatings, can solve problems such as energy waste, failure to fully consider element composition and mineral composition characteristics, pollution, etc., achieve long service life, ensure continued development and optimization, and thermal conductivity low effect

Active Publication Date: 2019-08-16
JIANGSU JIANAI HIGH TEMPERATURE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technical methods do not fully consider the element composition and mineral composition characteristics of urban sludge (organic substances and inorganic substances rich in silicon, aluminum, potassium, calcium, oxygen and other elements), resulting in waste of energy and waste of energy during the preparation process. exhaust air pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In the first step, 80 wt% of municipal sludge, 10 wt% of copper smelting waste, 5 wt% of polyoxyethylene stearate, and 5 wt% of zirconium sol were mixed evenly in proportion, and pressed at 50-100 MPa Forming, heat treatment at 100-300°C in a hydrogen atmosphere for 0.5-3 hours, crushing and grinding until material A with a particle size of 0.15-0.5 mm and material B with a particle size of less than 0.088 mm.

[0031] In the second step, 30 wt% of material A, 50 wt% of quartz sand, and 20 wt% of ball clay are mixed uniformly in proportion, granulated, and sieved to obtain granules with a particle size of 0.5-1 mm, and then the granules are Heat treatment at 700-1000°C for 0.5-3 hours in a hydrogen atmosphere to obtain material C.

[0032] In the third step, 60 wt% of material B, 5 wt% of bentonite, 5 wt% of elemental silicon powder, 10 wt% of metallic aluminum powder, 10 wt% of fused silica, and 10 wt% of marble waste were mixed in proportion Homogenize, granulate, an...

Embodiment 2

[0036] In the first step, 90 wt% of municipal sludge, 5 wt% of copper smelting waste, 3 wt% of polyacrylamide, and 2 wt% of silica sol were mixed uniformly in proportion, and pressed at 50-100 MPa, and placed After heat treatment at 100-300°C for 0.5-3 hours in a carbon monoxide atmosphere, crush and grind to material A with a particle size of 0.15-0.5 mm and material B with a particle size of less than 0.088 mm.

[0037] In the second step, 20 wt% of material A, 60 wt% of fused silica, and 20 wt% of bentonite were mixed uniformly in proportion, granulated, and sieved to obtain granules with a particle size of 0.5-1 mm, and then the granules were placed in Heat treatment at 400-600°C for 0.5-3 hours in a carbon monoxide atmosphere to obtain material C.

[0038] The third step is to mix 50 wt% of material B, 1wt% palygorskite, 9wt% elemental silicon powder, 1wt% metal aluminum powder, 19wt% silicon micropowder, and 20wt% marble waste in proportion , granulation, and sieving to...

Embodiment 3

[0042] In the first step, 90 wt% of municipal sludge, 8 wt% of copper smelting waste, 1 wt% of sorbitan oleate, and 1 wt% of aluminum sol were mixed evenly in proportion, and pressed at 50-100 MPa Forming, heat treatment at 100-300°C in a hydrogen atmosphere for 0.5-3 hours, crushing and grinding until material A with a particle size of 0.15-0.5 mm and material B with a particle size of less than 0.088 mm.

[0043] In the second step, 50 wt% of material A, 45 wt% of silica powder, and 5 wt% of palygorskite were mixed uniformly in proportion, granulated, and sieved to obtain granules with a particle size of 0.5-1 mm, and then the granules were The material is heat-treated at 500-800° C. for 0.5-3 hours in a hydrogen atmosphere to obtain material C.

[0044] In the third step, 50 wt% of material B, 5 wt% of ball clay, 10 wt% of elemental silicon powder, 5 wt% of metallic aluminum powder, 10 wt% of quartz sand, and 20 wt% of marble waste were proportionally Mix evenly, granulate...

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Abstract

A preparation method and an application of a light-weight high-infrared-emitting-rate coating. The preparation method includes the steps of: 1) uniformly mixing municipal sludge, copper refining waste residue, a surfactant and a binding agent according to ratio, performing press-moulding under 50-100 MPa, performing thermal treatment to the mixture in a reducing atmosphere, and crushing and grinding the mixture to obtain a material B; 2) uniformly mixing a material A, a silicon-containing raw material and clay according to ratio, and granulating and sieving the mixture to prepare a granular material being 0.5-1 mm in granular size; 3) performing thermal treatment to the granular material in a reducing atmosphere to obtain a material C; 4) uniformly mixing the material B, clay, elementary silicon powder, metal aluminum powder, the silicon-containing raw material and marble scrap according to ratio, and granulating and sieving the mixture to prepare a granular material being 0.15-0.5 mm in granular size; and 5) performing thermal treatment to the granular material in a reducing atmosphere at 200-500 DEG C for 0.5-3 h, and increasing the temperature to 600-1000 DEG C to perform thermal treatment to the granular material for 0.5-3 h in a neutral atmosphere to prepare a material D.

Description

technical field [0001] The invention belongs to the technical field of high-temperature kiln coatings. Specifically relates to a light-weight high-infrared emissivity coating and a preparation method thereof. Background technique [0002] Municipal sludge is a large amount of sludge produced in the process of urban sewage treatment, which is mainly composed of microorganisms and minerals and other substances adhered by microorganisms. At present, the main treatment methods of municipal sludge mainly include landfill, incineration, composting treatment, activation treatment and so on. The landfill method is low in cost, but the sludge contains not only organic matter, nitrogen, phosphorus, and potassium, but also a variety of heavy metals. Through landfill, these toxic and harmful substances and pathogenic microorganisms will pollute land and water resources; incineration To be equipped with a corresponding incineration system will cost a lot of investment and operating cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B33/132C04B33/138
CPCC04B33/1321C04B33/1324C04B33/138C04B35/66C04B2235/3217C04B2235/3244C04B2235/3418C04B2235/402C04B2235/428C04B2235/96C04B2235/9607Y02P40/60
Inventor 吴永来杨政宏王周福李杰刘浩
Owner JIANGSU JIANAI HIGH TEMPERATURE MATERIAL
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