CN107459849B - High-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating and preparation method thereof - Google Patents
High-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating and preparation method thereof Download PDFInfo
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
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Abstract
The invention discloses a high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating and a preparation method thereof. The coating comprises the following components in parts by weight: 10-20 parts of silicon carbide powder, 5-10 parts of alumina micropowder, 20-30 parts of high-alumina bauxite powder, 3-5 parts of chromium oxide micropowder, 20-30 parts of a bonding agent, 10-20 parts of a solvent, 0.1-0.2 part of a dispersing agent, 0.05-0.15 part of an antifoaming agent and 0.3-0.5 part of a thickening and leveling agent. The high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating has the beneficial effects that: 1) high temperature resistance, 2) high adhesion, 3) high strength of the coating, good fiber powdering prevention effect, 4) high infrared radiance, and 5) simple production and construction process of the coating.
Description
Technical Field
The invention belongs to the field of high-temperature energy-saving coatings, and particularly relates to a high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating and a preparation method thereof.
Background
The refractory fiber material has excellent high temperature resistance and heat insulation performance, is one of important ways for improving the thermal efficiency of an industrial furnace and is widely applied to various high-temperature thermal equipment, but the fiber material is easy to generate crystallization and cause fiber pulverization and shedding due to the growth of crystals when being used at high temperature for a long time, so that the service life of the fiber is influenced and even the product is polluted. Therefore, applying the anti-powdering and anti-scouring coating on the surface of the fiber material is considered to be an effective method for solving the above-mentioned disadvantages of the fiber material. The invention relates to an anti-scouring protective coating coated on a refractory fiber working surface (patent application No. 200410012616.7), which takes 0.2-5mm alumina hollow spheres as a main raw material, and proper bonding agent and plasticizer are added to prepare the daub-shaped anti-scouring protective coating, the particle size of the raw material used by the coating reaches 5mm and is daub-shaped, so the coating thickness of the coating must exceed 5mm or even 1cm, the coating uniformity is difficult to ensure, the coating is too thick, the cracking and falling phenomena are easy to occur, the service life of the coating is difficult to ensure, the specific gravity of a fiber product is small, the strength is low, if a coating with high strength, high specific gravity and large thickness is selected to be coated on the surface of the fiber product, the phenomenon that the coating and fibers are separated and fall off is easy to occur, and the due effect of the coating is. If the fiber coating can overcome some fatal defects of the fiber product on one hand to improve the service range and the service life of the fiber product and can play a role in making the energy-saving effect of the fiber more attractive, the fiber coating is a more promising solution for solving the service defects of the fiber product.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating and a preparation method thereof.
The purpose of the invention is realized by the following technical scheme:
the high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating comprises the following components in parts by weight: 10-20 parts of silicon carbide powder, 5-10 parts of alumina micropowder, 20-30 parts of high-alumina bauxite powder, 3-5 parts of chromium oxide micropowder, 20-30 parts of a bonding agent, 10-20 parts of a solvent, 0.1-0.2 part of a dispersing agent, 0.05-0.15 part of an antifoaming agent and 0.3-0.5 part of a thickening and leveling agent.
The granularity of the alumina micro powder and the chromium oxide micro powder is 1-5 mu m; the granularity of the silicon carbide powder and the high-alumina bauxite powder is less than or equal to 88 mu m.
The binding agent is one of silica sol and water glass.
The solvent is water.
The dispersing agent is one of sodium tripolyphosphate, sodium hexametaphosphate, ammonium polyacrylate and basf FS 10.
The defoaming agent is one of an organic silicon defoaming agent or a polyether modified silicon defoaming agent.
The thickening and leveling agent is an acrylic copolymer thickening and leveling agent.
The raw materials used in the invention can be purchased in the market, and the specification conforms to the national or industrial standard.
The preparation method of the high-temperature-resistant anti-fiber pulverization infrared high-radiation energy-saving coating comprises the following steps: weighing the solvent and the dispersing agent according to the proportion, putting the solvent and the dispersing agent into a high-speed stirrer, and stirring for 5-10 minutes at the rotating speed of 500-1000rpm to fully dissolve the dispersing agent in the solvent; adding the alumina micro powder and the chromium oxide micro powder according to the proportion, stirring at the rotating speed of 5000-; then adding silicon carbide powder with a slightly larger particle size and bauxite powder, and stirring at the rotating speed of 1000-2000rpm for 10-30 minutes; and finally, sequentially adding the defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 1000-2000rpm for 30-60 minutes to obtain the high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating.
The invention aims to provide the coating with the properties of fiber pulverization prevention and scouring prevention on one hand and infrared high-radiation performance on the other hand. For energy saving of industrial kilns, energy saving effects are generally achieved by improving the utilization rate of energy sources through two ways, one way is to select heat-insulating materials with good heat-insulating performance such as fiber products to improve the heat-insulating effect of a furnace body and reduce heat dissipation loss from a furnace wall, the other way is to improve the utilization rate of fuel and reduce heat emission to achieve energy saving of kilns, and the selection of high infrared radiation materials on the surface of a furnace lining is considered to be an effective way for improving the utilization rate of the fuel. The high-temperature infrared radiance of the fiber product is generally lower, the silicon carbide powder and the chromium oxide micro powder selected by the invention have higher infrared radiance, and the infrared radiance can reach more than 0.9, so that the coating has higher infrared radiance. The selected alumina micro powder can ensure that the coating can permeate the surface of the fiber product and be sintered with the fiber product after being used at high temperature for a long time, so that the aim of connecting the coating and the fiber product into a whole is fulfilled, and the coating is prevented from cracking and falling.
The difficulty of the invention lies in how to uniformly disperse a plurality of micro powders in the coating slurry and ensure that the slurry does not generate precipitation and delamination for a long time. The dispersing agent is fully dissolved in the solvent, the micro powder aggregate can be opened under the combined action of the dispersing agent and high-speed stirring mechanical force, then the bonding agent and other powder materials are added, the full mixing of various powder materials can be ensured through stirring, and finally the added thickening and leveling agent plays a role in increasing the viscosity of the slurry, so that the coating can be prevented from being precipitated and layered for a long time.
The high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating has the beneficial effects that:
1) and (4) high temperature resistance. The invention combines several inorganic powders and inorganic bonding agents, and ensures that the maximum use temperature of the coating can reach 1400 DEG C
2) High adhesion. The invention selects the particle effect of the inorganic high-temperature bonding agent and the micro powder to jointly combine to improve the high-temperature bonding force of the coating and the fiber product, and the water glass and the silica sol both belong to high-temperature bonding agents and can ensure that the coating is tightly connected with the fiber product at high temperature (above 600 ℃) and is not easy to fall off.
3) The coating has high strength and good effect of preventing fiber pulverization. The high-temperature bonding agent tightly bonds various powder together and mutually permeates with the fiber product, and slight sintering is generated after long-term use at high temperature, so that the coating has higher high-temperature strength, and further the high-temperature wear resistance and scouring resistance of the coating are improved, and the pulverization and the block falling of the fiber product are prevented.
4) High infrared radiance. According to the invention, silicon carbide powder and chromium oxide micro powder with high infrared radiance are selected as raw materials, so that the infrared radiance of the coating can be ensured to be above 0.9.
5) The production and construction process of the coating is simple. The raw materials used in the invention can be used by stirring the coating once without premixing, drying, crushing and grinding. When the coating is applied, the coating is only needed to be sprayed on the surface of the fiber product by using a common spray gun for spraying paint, and the thickness of the sprayed coating is 0.3-0.5 mm.
Detailed Description
Example 1, a high temperature resistant anti-fiber pulverization infrared high radiation energy saving coating and a preparation method thereof, comprising the following components, by weight, 10 parts of silicon carbide powder, 10 parts of alumina micropowder, 30 parts of high alumina powder, 5 parts of chromium oxide micropowder, 30 parts of water glass, 15 parts of water, 0.15 part of polyethylene glycol type water reducing agent CAMTMENT FS10 dispersant produced by basf, germany, 0.05 part of organic silicon defoamer, and 0.3 part of acrylic copolymer type thickening and leveling agent.
Weighing deionized water and a dispersing agent according to the proportion, putting the deionized water and the dispersing agent into a high-speed stirrer, stirring for 10 minutes at the rotating speed of 500rpm, adding corresponding alumina and chromium oxide micro powder, stirring for 30 minutes at the rotating speed of 8000rpm, adding water glass, and stirring for 10 minutes at the rotating speed of 8000 rpm; then adding silicon carbide and high-alumina bauxite powder and stirring for 30 minutes at the rotating speed of 2000 rpm; and finally, sequentially adding the organic silicon defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 2000rpm for 30 minutes to obtain the high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating.
Embodiment 2, a high temperature resistant anti-fiber pulverization infrared high radiation energy-saving coating and a preparation method thereof, which comprises the following components, by weight, 20 parts of silicon carbide powder, 5 parts of alumina micropowder, 20 parts of high alumina powder, 5 parts of chromium oxide micropowder, 30 parts of water glass, 20 parts of water, 0.1 part of polyethylene glycol type water reducing agent CAMTMENT FS10 dispersant produced by Germany Pasteur, 0.15 part of organic silicon defoamer, and 0.5 part of acrylic copolymer type thickening and leveling agent.
Weighing deionized water and a dispersing agent according to the proportion, putting the deionized water and the dispersing agent into a high-speed stirrer, stirring for 5 minutes at the rotating speed of 1000rpm, adding corresponding alumina and chromium oxide micro powder, stirring for 30 minutes at the rotating speed of 5000rpm, adding water glass, and stirring for 30 minutes at the rotating speed of 5000 rpm; then adding silicon carbide and high-alumina bauxite powder and stirring at the rotating speed of 2000rpm for 10 minutes; and finally, sequentially adding the organic silicon defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 1000rpm for 60 minutes to obtain the high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating.
Embodiment 3, the high temperature resistant anti-fiber pulverization infrared high radiation energy-saving coating and the preparation method thereof comprise, by weight, 17 parts of silicon carbide powder, 10 parts of alumina micropowder, 30 parts of high alumina powder, 3 parts of chromium oxide micropowder, 30 parts of water glass, 10 parts of water, 0.15 part of an additional sodium tripolyphosphate dispersing agent, 0.1 part of a polyether modified silicon defoaming agent, and 0.3 part of an acrylic copolymer type thickening and leveling agent.
Weighing deionized water and a dispersing agent according to the proportion, putting the deionized water and the dispersing agent into a high-speed stirrer, stirring for 5 minutes at the rotating speed of 1000rpm, adding corresponding alumina and chromium oxide micro powder, stirring for 10 minutes at the rotating speed of 8000rpm, adding water glass, and stirring for 20 minutes at the rotating speed of 8000 rpm; then adding silicon carbide and high-alumina bauxite powder and stirring at the rotating speed of 2000rpm for 10 minutes; and finally, sequentially adding the organic silicon defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 1000rpm for 60 minutes to obtain the high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating.
Embodiment 4, a high temperature resistant anti-fiber pulverization infrared high radiation energy saving coating and a preparation method thereof, comprising the following components, by weight, 15 parts of silicon carbide powder, 10 parts of alumina micropowder, 25 parts of high alumina bauxite powder, 4 parts of chromium oxide micropowder, 26 parts of water glass, 20 parts of water, 0.15 part of an additional sodium hexametaphosphate dispersant, 0.1 part of a polyether modified silicon defoamer, and 0.4 part of an acrylic copolymer type thickening leveling agent.
Weighing deionized water and a dispersing agent according to the proportion, putting the deionized water and the dispersing agent into a high-speed stirrer, stirring the mixture for 80 minutes at the rotating speed of 800rpm, adding corresponding alumina and chromium oxide micro powder, stirring the mixture for 20 minutes at the rotating speed of 6000rpm, adding water glass, and stirring the mixture for 30 minutes at the rotating speed of 6000 rpm; then adding silicon carbide and high-alumina bauxite powder and stirring at the rotating speed of 1500rpm for 20 minutes; and finally, sequentially adding the organic silicon defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 1500rpm for 50 minutes to obtain the high-temperature-resistant anti-fiber pulverization infrared high-radiation energy-saving coating.
Embodiment 5, a high temperature resistant anti-fiber pulverization infrared high radiation energy saving coating and a preparation method thereof, comprising the following components, by weight, 10 parts of silicon carbide powder, 8 parts of alumina micropowder, 27 parts of high alumina bauxite powder, 5 parts of chromium oxide micropowder, 30 parts of water glass, 20 parts of water, 0.15 part of ammonium polyacrylate dispersant, 0.1 part of organic silicon defoamer, and 0.4 part of acrylic copolymer type thickening leveling agent.
Weighing deionized water and a dispersing agent according to the proportion, putting the deionized water and the dispersing agent into a high-speed stirrer, stirring the deionized water and the dispersing agent for 10 minutes at the rotating speed of 1000rpm, adding corresponding alumina and chromium oxide micro powder, stirring the mixture for 10 minutes at the rotating speed of 8000rpm, adding water glass, and stirring the mixture for 20 minutes at the rotating speed of 8000 rpm; then adding silicon carbide and high-alumina bauxite powder and stirring for 30 minutes at the rotating speed of 1000 rpm; and finally, sequentially adding the organic silicon defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 2000rpm for 30 minutes to obtain the high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating.
Embodiment 6 discloses a high temperature resistant anti-fiber pulverization infrared high radiation energy-saving coating and a preparation method thereof, which comprises the following components, by weight, 20 parts of silicon carbide powder, 5 parts of alumina micro powder, 30 parts of high alumina powder, 5 parts of chromium oxide micro powder, 20 parts of water glass, 20 parts of water, 0.2 part of an additional sodium tripolyphosphate dispersing agent, 0.15 part of an organic silicon defoaming agent, and 0.3 part of an acrylic copolymer thickening and leveling agent.
Weighing deionized water and a dispersing agent according to the proportion, putting the deionized water and the dispersing agent into a high-speed stirrer, stirring the mixture for 10 minutes at the rotating speed of 700rpm, adding corresponding alumina and chromium oxide micro powder, stirring the mixture for 25 minutes at the rotating speed of 6000rpm, adding water glass, and stirring the mixture for 20 minutes at the rotating speed of 6000 rpm; then adding silicon carbide and high-alumina bauxite powder and stirring at the rotating speed of 2000rpm for 20 minutes; and finally, sequentially adding the organic silicon defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 1000rpm for 50 minutes to obtain the high-temperature-resistant anti-fiber pulverization infrared high-radiation energy-saving coating.
Example 7, a high temperature resistant anti-fiber pulverization infrared high radiation energy saving coating and preparation method, composed of the following components, by weight, 12 parts of silicon carbide powder, 8 parts of alumina micropowder, 25 parts of high alumina bauxite powder, 5 parts of chromium oxide micropowder, 30 parts of water glass, 20 parts of water, 0.1 part of sodium hexametaphosphate dispersant, 0.05 part of silicone defoamer, 0.5 part of acrylic copolymer type thickening leveling agent.
Weighing deionized water and a dispersing agent according to the proportion, putting the deionized water and the dispersing agent into a high-speed stirrer, stirring the deionized water and the dispersing agent for 10 minutes at the rotating speed of 1000rpm, adding corresponding alumina and chromium oxide micro powder, stirring the mixture for 30 minutes at the rotating speed of 5000rpm, adding water glass, and stirring the mixture for 30 minutes at the rotating speed of 5000 rpm; then adding silicon carbide and high-alumina bauxite powder and stirring at the rotating speed of 1500rpm for 20 minutes; and finally, sequentially adding the organic silicon defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 1500rpm for 40 minutes to obtain the high-temperature-resistant anti-fiber pulverization infrared high-radiation energy-saving coating.
Embodiment 8, a high temperature resistant anti-fiber pulverization infrared high radiation energy saving coating and a preparation method thereof, comprising the following components, by weight, 15 parts of silicon carbide powder, 7 parts of alumina micropowder, 30 parts of high alumina bauxite powder, 3 parts of chromium oxide micropowder, 25 parts of water glass, 20 parts of water, 0.2 part of ammonium polyacrylate dispersant, 0.1 part of organic silicon defoamer, and 0.5 part of acrylic copolymer type thickening and leveling agent.
Weighing deionized water and a dispersing agent according to the proportion, putting the deionized water and the dispersing agent into a high-speed stirrer, stirring for 8 minutes at the rotating speed of 600rpm, adding corresponding alumina and chromium oxide micro powder, stirring for 25 minutes at the rotating speed of 6000rpm, adding water glass, and stirring for 20 minutes at the rotating speed of 6000 rpm; then adding silicon carbide and high-alumina bauxite powder and stirring for 30 minutes at the rotating speed of 1000 rpm; and finally, sequentially adding the organic silicon defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 2000rpm for 50 minutes to obtain the high-temperature-resistant anti-fiber pulverization infrared high-radiation energy-saving coating.
Example 9, a high temperature resistant anti-fiber pulverization infrared high radiation energy saving coating and a preparation method thereof, comprising the following components, by weight, 15 parts of silicon carbide powder, 10 parts of alumina micropowder, 27 parts of high alumina bauxite powder, 3 parts of chromium oxide micropowder, 25 parts of water glass, 20 parts of water, 0.1 part of polyethylene glycol type water reducing agent CAMTMENT FS10 dispersant produced by basf, germany, 0.15 part of polyether modified silicon defoamer, and 0.5 part of acrylic copolymer type thickening and leveling agent.
Weighing deionized water and a dispersing agent according to the proportion, putting the deionized water and the dispersing agent into a high-speed stirrer, stirring for 5 minutes at the rotating speed of 1000rpm, adding corresponding alumina and chromium oxide micro powder, stirring for 20 minutes at the rotating speed of 5000rpm, adding water glass, and stirring for 30 minutes at the rotating speed of 5000 rpm; then adding silicon carbide and high-alumina bauxite powder and stirring for 30 minutes at the rotating speed of 2000 rpm; and finally, sequentially adding the organic silicon defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 1000rpm for 60 minutes to obtain the high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating.
Claims (1)
1. The high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating is characterized by comprising the following components in parts by weight: 10-20 parts of silicon carbide powder, 5-10 parts of alumina micropowder, 20-30 parts of high-alumina bauxite powder, 3-5 parts of chromium oxide micropowder, 20-30 parts of silica sol, 10-20 parts of water, 0.1-0.2 part of ammonium polyacrylate dispersant, 0.05-0.15 part of organic silicon defoamer and 0.3-0.5 part of acrylic copolymer type thickening and leveling agent;
the granularity of the alumina micro powder and the chromium oxide micro powder is 1-5 mu m; the particle sizes of the silicon carbide powder and the high-alumina bauxite powder are less than or equal to 88 mu m;
the preparation method of the coating comprises the following steps: weighing water and the ammonium polyacrylate dispersant according to the proportion, putting the water and the ammonium polyacrylate dispersant into a high-speed stirrer, and stirring the mixture for 5 to 10 minutes at the rotating speed of 500-1000rpm to fully dissolve the ammonium polyacrylate in the water; adding alumina micro powder and chromium oxide micro powder according to a ratio, stirring at the rotating speed of 5000-; then adding silicon carbide powder with slightly larger granularity and high-alumina bauxite powder, and stirring for 10-30 minutes at the rotating speed of 1000-2000 rpm; and finally, sequentially adding the organic silicon defoaming agent and the thickening and leveling agent according to the proportion, and stirring at the rotating speed of 1000-2000rpm for 30-60 minutes to obtain the high-temperature-resistant fiber pulverization-resistant infrared high-radiation energy-saving coating.
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| CN110835477A (en) * | 2019-12-12 | 2020-02-25 | 河南洛烯纳米材料有限公司 | High-temperature-resistant graphene oxidation-resistant nano ceramic coating and preparation method thereof |
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| CN101085890A (en) * | 2007-07-05 | 2007-12-12 | 北京北科威斯迈技术发展有限公司 | High temperature heat radiation coating and preparing method thereof |
| KR101689634B1 (en) * | 2016-08-04 | 2016-12-26 | 노세윤 | Surface Coating Method Exhibiting Solid Pattern Texture |
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| CN1168787C (en) * | 2002-03-01 | 2004-09-29 | 迟贵庆 | Far infrared energy saving paint |
| CN102391696A (en) * | 2011-09-21 | 2012-03-28 | 镇江忆诺唯记忆合金有限公司 | High-temperature anti-oxidation coating based on attapulgite clay (ATP) |
| CN102786820B (en) * | 2012-05-14 | 2014-12-03 | 武汉理工大学 | Infrared radiation coating suitable for metal matrix and preparation method |
| CN104877397B (en) * | 2015-05-21 | 2017-11-07 | 石家庄炳欣冶金炉料有限公司 | A kind of steel billet high temperature protective coating and its application |
| CN106928832B (en) * | 2017-04-21 | 2019-11-22 | 中国平煤神马能源化工集团有限责任公司 | A kind of high temperature resistant anti-infrared radiance decaying energy-saving coatings |
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| CN101085890A (en) * | 2007-07-05 | 2007-12-12 | 北京北科威斯迈技术发展有限公司 | High temperature heat radiation coating and preparing method thereof |
| KR101689634B1 (en) * | 2016-08-04 | 2016-12-26 | 노세윤 | Surface Coating Method Exhibiting Solid Pattern Texture |
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