CN118185419A - Anti-coking coating for castable surface of combustion chamber of garbage incinerator and preparation method thereof - Google Patents
Anti-coking coating for castable surface of combustion chamber of garbage incinerator and preparation method thereof Download PDFInfo
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- CN118185419A CN118185419A CN202410299469.3A CN202410299469A CN118185419A CN 118185419 A CN118185419 A CN 118185419A CN 202410299469 A CN202410299469 A CN 202410299469A CN 118185419 A CN118185419 A CN 118185419A
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- 238000004939 coking Methods 0.000 title claims abstract description 58
- 239000011248 coating agent Substances 0.000 title claims abstract description 57
- 238000000576 coating method Methods 0.000 title claims abstract description 57
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 54
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 77
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000013078 crystal Substances 0.000 claims abstract description 22
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 19
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000423 chromium oxide Inorganic materials 0.000 claims abstract description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 17
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 14
- 239000003973 paint Substances 0.000 claims description 19
- 238000000498 ball milling Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 229920005749 polyurethane resin Polymers 0.000 claims description 3
- 239000000571 coke Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 10
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 6
- 238000003723 Smelting Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000007767 bonding agent Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000011858 nanopowder Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 239000002113 nanodiamond Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- QBLDFAIABQKINO-UHFFFAOYSA-N barium borate Chemical compound [Ba+2].[O-]B=O.[O-]B=O QBLDFAIABQKINO-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000005235 decoking Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- VGTPKLINSHNZRD-UHFFFAOYSA-N oxoborinic acid Chemical compound OB=O VGTPKLINSHNZRD-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
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- Ceramic Products (AREA)
Abstract
The invention discloses an anti-coking coating for the surface of castable of a combustion chamber of a garbage incinerator and a preparation method thereof, wherein the anti-coking coating comprises the following raw materials in percentage by weight: 15-25% of high-purity large-crystal silicon carbide powder, 15-25% of fused zirconia powder, 10-15% of chromium oxide fine powder, 20-25% of high-purity zirconium boride powder, 10-15% of alumina micro powder and 15-20% of binding agent. The electric smelting zirconia, the high-purity large crystal silicon carbide, the chromium oxide and the high-purity zirconium boride in the coating raw materials are all high-temperature resistant inert materials, and still can not react with silicate substances when the working environment temperature reaches about 1400 ℃, so that the condition of reaction adhesion between a coating and high-temperature coke is reduced, and the mutual contact between a castable and the high-temperature coke is separated. In addition, the high-purity large-crystal silicon carbide and the high-purity zirconium boride also belong to non-oxide materials, so that the oxide materials are not easy to react, and the effect of preventing the coating from adhering with the gray coke is further ensured.
Description
Technical Field
The invention relates to the technical field of anti-slagging paint, in particular to anti-coking paint for the surface of castable of a combustion chamber of a garbage incinerator and a preparation method thereof.
Background
With the rapid development of the urban process and the progress of industry, more and more household garbage and general solid waste are inevitably generated, and the garbage incinerator is the most effective and economical treatment mode for incinerating the household garbage and general solid waste, and is an important means for ensuring the sustainable development of society and economy. The garbage incinerator is generally composed of a combustion area (fire grate, front and rear arches and two side walls), a waste heat boiler, desulfurization, denitrification and dust removal equipment at the rear end and the like. Because various types of household garbage and general solid waste garbage articles for garbage incineration treatment are complex, the garbage incinerator not only contains corrosive S, cl plasma, but also Na, K and other substances which are easy to form low melting points. In order to prevent the generation of dioxin harmful to the environment and human health in a combustion area, the temperature of the area cannot be lower than 980 ℃, the temperature of the area is generally kept at about 1100 ℃ in the normal operation process of an incinerator, sometimes 1400 ℃ can be reached, ash coke left after incineration can form semi-molten or molten silicate substances due to lower melting point and is adhered to the surfaces of a front arch, a rear arch and a side wall, the front arch, the rear arch and the side wall are generally built by high-aluminum silicon carbide castable, the ash coke can react with the castable to corrode and permeate, on one hand, the service life of the castable is influenced, on the other hand, the ash Jiao Nianfu is thicker on the surface of the castable, and on the other hand, the ash coke bridge on the front arch and the rear arch surface enables the mouth of the combustion area to be smaller and smaller when serious, the garbage incinerator is forced to stop the incinerator to clean, and the normal operation of equipment is influenced. The problem is the pain spot problem that needs to solve at present msw incineration stove urgently, and most msw incineration stoves are all because the coking in this region leads to, and msw incineration stove is shut down and is burnt and need the manual work to clear up with instruments such as spade pneumatic pick, consumes a large amount of manpower and materials financial resources on the one hand and brings the potential safety hazard, and on the other hand msw incineration stove is shut down and can lead to the unable economic benefits and the social of handling influence enterprise of rubbish. Therefore, the development of the anti-coking coating coated on the surface of the castable can separate the gray coke from the castable, and the gray coke is not easy to adhere to the surface of the coating, so that the problem of coking on the surface of the castable can be effectively solved, the long-period stable operation of equipment is ensured, and the anti-coking coating has higher economic and social values.
The applicant has previously developed an anti-coking coating product and patented, as in reference 1:
reference 1: chinese patent document with patent publication No. CN116179078 a.
Reference 1 discloses an anti-corrosion and anti-coking coating for a quenching tower of a hazardous waste incineration system and a preparation method thereof, wherein the coating comprises the following raw materials: 35-50% of nano diamond powder, 10-15% of nano chromium oxide, 5-10% of nano zirconium boride powder, 5-10% of silicon boride micropowder and 20-30% of bonding agent. The invention utilizes the particle stacking effect and the low-temperature sintering effect of the nano powder to achieve the densification of the coating, plays a role in corrosion prevention, and the material belongs to an inorganic nonmetallic material, is not easy to generate adhesion reaction with an oxide material, has high density and strength, plays a role in preventing the oxide from generating reaction adhesion on one hand, and has stronger acid-base atmosphere corrosion on the other hand. The nano diamond powder in the coating is a carbon material, has smooth surface, high hardness and wear resistance, is not easy to wet with various chlorides, sulfides and sulfates, and has the main function of preventing various molten ash, various salts, nonferrous metals and oxides from adhering to the surface of the coating, thereby playing an anti-coking role.
However, the function and principle of the coating are similar to those of the invention, and the coating is nano powder, so that the use temperature is not high, and the maximum use temperature is not higher than 700 ℃.
Applicant has also retrieved another prior art anti-slagging composite material, such as reference 2:
Reference 2: chinese patent document with patent publication number CN 114853455A.
Reference 2 discloses an anti-slagging corrosion-resistant high-temperature composite coating and a preparation method thereof, wherein the anti-slagging corrosion-resistant high-temperature composite coating comprises, by weight, 20-30 parts of corundum fine powder specification mixture, 2-5 parts of ceramic powder with the particle size of 0.01-0.025 mm, 10-15 parts of barium metaborate, 15-20 parts of nano silicon dioxide, 2-6 parts of quartz powder, 0.5-1 part of nano yttrium oxide with the particle size of 30nm, 1-2 parts of nano cerium oxide with the particle size of 30nm, 15-20 parts of a binding agent, 0.2-0.5 part of a dispersing agent, 1-5 parts of an anti-settling additive, 10 parts of fatty alcohol polyoxyethylene ether, 2-5 parts of sodium nitrite and 2 parts of FeCl. Solves the problem that the inner wall paint of the existing garbage incinerator can not synchronously have corrosion resistance when ensuring certain anti-slagging and anti-high temperature performances.
However, the nano powder raw material in the composite material has high activity, and has been reacted and sintered at high temperature (above 800 ℃), and in addition, nano silicon dioxide, quartz powder and metaboric acid are easy to react with K + and Na + in the ash of the garbage incinerator to form a low-melting-point phase, which affects the practical use effect.
Disclosure of Invention
The invention aims to solve the problem that the use effect of an anti-coking coating in the prior art is poor in a high-temperature environment (about 1400 ℃), and provides an anti-coking coating for the surface of a castable of a combustion chamber of a garbage incinerator and a preparation method thereof.
The invention solves the technical problems, and adopts the following technical scheme: an anti-coking coating for the surface of castable of a combustion chamber of a garbage incinerator is prepared from the following raw materials in percentage by weight: 15-25% of high-purity large-crystal silicon carbide powder, 15-25% of fused zirconia powder, 10-15% of chromium oxide fine powder, 20-25% of high-purity zirconium boride powder, 10-15% of alumina micro powder and 15-20% of binding agent.
As the anti-coking paint for the surface of the castable of the combustion chamber of the garbage incinerator, the invention is further optimized: the coating consists of the following raw materials in percentage by weight: 25% of high-purity large-crystal silicon carbide powder, 20% of fused zirconia powder, 12% of chromium oxide fine powder, 23% of high-purity zirconium boride powder, 12% of alumina micro powder and 20% of a bonding agent.
As the anti-coking paint for the surface of the castable of the combustion chamber of the garbage incinerator, the invention is further optimized: the granularity of the high-purity large-crystal silicon carbide powder is less than or equal to 0.088mm.
As the anti-coking paint for the surface of the castable of the combustion chamber of the garbage incinerator, the invention is further optimized: the granularity of the fused zirconia powder is less than or equal to 0.044mm.
As the anti-coking paint for the surface of the castable of the combustion chamber of the garbage incinerator, the invention is further optimized: the granularity of the chromium oxide fine powder is less than or equal to 0.2mm.
As the anti-coking paint for the surface of the castable of the combustion chamber of the garbage incinerator, the invention is further optimized: the high-purity zirconium boride powder is less than or equal to 0.044mm.
As the anti-coking paint for the surface of the castable of the combustion chamber of the garbage incinerator, the invention is further optimized: the granularity of the alumina micropowder is less than or equal to 0.010mm.
As the anti-coking paint for the surface of the castable of the combustion chamber of the garbage incinerator, the invention is further optimized: the bonding agent is epoxy resin or polyurethane resin.
The invention also provides a preparation method of the anti-coking coating for the surface of the castable of the combustion chamber of the garbage incinerator, which comprises the following steps:
S1, taking all raw materials according to the raw material composition of the paint;
s2, uniformly mixing the high-purity large-crystal silicon carbide powder, the electric smelting zirconia micro powder and the high-purity zirconium boride micro powder, adding a binding agent, uniformly stirring, adding the chromium oxide fine powder and the aluminum oxide micro powder, and performing stirring ball milling to obtain the anti-coking coating.
As the preparation method of the anti-coking paint for the surface of the castable of the combustion chamber of the garbage incinerator, the invention is further optimized: the ball milling operation conditions are as follows: the ball milling rotating speed is 250-300 r/min, the ball material mass ratio is 20-25:1, and the ball milling time is 3-5 hours.
The invention has the following beneficial effects:
The electric smelting zirconia, the high-purity large crystal silicon carbide, the chromium oxide and the high-purity zirconium boride in the coating raw materials are all high-temperature resistant inert materials, and still can not react with silicate substances when the working environment temperature reaches about 1400 ℃, so that the condition of reaction adhesion between a coating and high-temperature coke is reduced, and the mutual contact between a castable and the high-temperature coke is separated. In addition, the high-purity large-crystal silicon carbide and the high-purity zirconium boride also belong to non-oxide materials, so that the oxide materials are not easy to react, and the effect of preventing the coating from adhering with the gray coke is further ensured.
The coating formed by the coating has smooth surface, silicate substances in high-temperature melting and semi-melting states are not easy to adhere to the surface of the coating, and the effect of reducing coking can be achieved; on the other hand, the coating material is not easy to react with silicate material at about 1400 ℃, and the coating material and the silicate material are not easy to adhere without chemical reaction, so that the anti-coking effect can be achieved, the workload of manual decoking is obviously reduced, the maintenance times of furnace shutdown caused by coking are reduced, and the operation period of the garbage incinerator is prolonged. The coating formed by the coating can effectively protect the refractory material, prevent the oxidation corrosion of the refractory material at high temperature for a long time, and prolong the service life of the refractory material.
Drawings
FIG. 1 shows the surface coking condition of the front and rear arch castable of the garbage incinerator before using the anti-coking coating;
FIG. 2 shows the situation after the surfaces of the front and rear arches of the garbage incinerator are coated with the anti-coking coating;
FIG. 3 shows the coking condition of the garbage incinerator after the anti-coking paint is coated and before and after the garbage incinerator is operated for 6 months.
Detailed Description
For a better understanding of the present invention, the following examples are set forth to illustrate, but are not to be construed as limiting the invention.
Example 1]
An anti-coking coating for the surface of castable of a combustion chamber of a garbage incinerator, and the preparation method comprises the following steps:
s1, taking the following raw materials in percentage by weight: 25% of high-purity large-crystal silicon carbide powder, 20% of fused zirconia micro powder, 12% of chromium oxide fine powder, 23% of high-purity zirconia micro powder, 12% of alumina micro powder and 20% of a binding agent.
Wherein the granularity of the high-purity large-crystal silicon carbide powder is less than or equal to 0.088mm, the granularity of the fused zirconia micro powder is less than or equal to 0.044mm, the granularity of the chromia micro powder is less than or equal to 0.2mm, the granularity of the high-purity zirconia micro powder is less than or equal to 0.044mm, and the granularity of the alumina micro powder is less than or equal to 0.010mm.
Wherein, the bonding agent is epoxy resin.
S2, uniformly mixing high-purity large-crystal silicon carbide powder, electric smelting zirconia micro powder and high-purity zirconium boride micro powder, adding a binding agent, uniformly stirring, adding chromium oxide fine powder and alumina micro powder, and performing stirring ball milling (the ball milling rotating speed is 300r/min, the ball material mass ratio is 20:1, and the ball milling time is 4 hours) to obtain the anti-coking coating.
< Effect of practical application of paint >
The surface coking of the front and rear arch castable of Loudi Kang Heng environmental protection limited company garbage incinerator is serious, the incinerator needs to be shut down for 3-6 months to clean coke, the safe and stable operation and economic benefit of equipment are seriously affected, because the coking amount is large and the strength is high, the coking prevention paint is coated on the surface of the front and rear arch castable of the garbage incinerator in 2023 months, the surface coking condition of the front and rear arch castable is greatly reduced after 6 months of operation and shutdown inspection, a layer of thin attached coke exists on the surface of the castable, the manual cleaning of a rack is not needed, the operation period of the incinerator is at least prolonged by more than 6 months, and the refractory castable is effectively protected from being corroded by coke.
As can be seen from fig. 1, the surface coking of the castable of the front arch and the rear arch of the garbage incinerator is serious before using the anti-coking coating, the mouth of the incinerator is smaller and smaller after the incinerator is operated for a period of time, the incinerator is almost blocked, and in this case, the incinerator must be shut down for coke cleaning. Fig. 2 shows the situation after the coking-preventing paint is coated on the surfaces of the front and rear arches of the garbage incinerator, and the green area is the area coated with the paint. Fig. 3 shows the coking condition of the garbage incinerator after the anti-coking coating is applied and before and after the garbage incinerator is operated for 6 months, and as can be seen from the figure, the whole furnace mouth space is almost unchanged, only one layer of attached coke is arranged on the surface, the attached coke area is small, cleaning is not needed, and the garbage incinerator can continue to normally operate under the condition that the garbage incinerator is operated for at least half a year. Therefore, the coating effectively improves the operation period of the garbage incinerator, and improves the corrosion resistance of the castable so as to effectively prolong the service life of the castable.
Example 2 ]
An anti-coking coating for the surface of castable of a combustion chamber of a garbage incinerator, and the preparation method comprises the following steps:
s1, taking the following raw materials in percentage by weight: 15% of high-purity large-crystal silicon carbide powder, 25% of fused zirconia micro powder, 15% of chromium oxide fine powder, 25% of high-purity zirconia micro powder, 15% of alumina micro powder and 20% of a binding agent.
Wherein the granularity of the high-purity large-crystal silicon carbide powder is less than or equal to 0.088mm, the granularity of the fused zirconia micro powder is less than or equal to 0.044mm, the granularity of the chromia micro powder is less than or equal to 0.2mm, the granularity of the high-purity zirconia micro powder is less than or equal to 0.044mm, and the granularity of the alumina micro powder is less than or equal to 0.010mm.
Wherein the bonding agent is polyurethane resin.
S2, uniformly mixing high-purity large-crystal silicon carbide powder, electric smelting zirconia micro powder and high-purity zirconium boride micro powder, adding a binding agent, uniformly stirring, adding chromium oxide fine powder and alumina micro powder, and performing stirring ball milling (the ball milling rotating speed is 250r/min, the ball material mass ratio is 25:1, and the ball milling time is 5 hours) to obtain the anti-coking coating.
Example 3 ]
An anti-coking coating for the surface of castable of a combustion chamber of a garbage incinerator, and the preparation method comprises the following steps:
S1, taking the following raw materials in percentage by weight: 25% of high-purity large-crystal silicon carbide powder, 20% of fused zirconia micro powder, 15% of chromium oxide fine powder, 25% of high-purity zirconia micro powder, 15% of alumina micro powder and 15% of a binding agent.
Wherein the granularity of the high-purity large-crystal silicon carbide powder is less than or equal to 0.088mm, the granularity of the fused zirconia micro powder is less than or equal to 0.044mm, the granularity of the chromia micro powder is less than or equal to 0.2mm, the granularity of the high-purity zirconia micro powder is less than or equal to 0.044mm, and the granularity of the alumina micro powder is less than or equal to 0.010mm.
Wherein, the bonding agent is epoxy resin.
S2, uniformly mixing high-purity large-crystal silicon carbide powder, electric smelting zirconia micro powder and high-purity zirconium boride micro powder, adding a binding agent, uniformly stirring, adding chromium oxide fine powder and alumina micro powder, and performing stirring ball milling (the ball milling rotating speed is 300r/min, the ball material mass ratio is 25:1, and the ball milling time is 3 hours) to obtain the anti-coking coating.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (10)
1. The anti-coking paint for the surface of the castable of the combustion chamber of the garbage incinerator is characterized by comprising the following raw materials in percentage by weight: 15-25% of high-purity large-crystal silicon carbide powder, 15-25% of fused zirconia powder, 10-15% of chromium oxide fine powder, 20-25% of high-purity zirconium boride powder, 10-15% of alumina micro powder and 15-20% of binding agent.
2. The anti-coking coating for the surface of the castable of the combustion chamber of the garbage incinerator as claimed in claim 1, which is characterized by comprising the following raw materials in percentage by weight: 25% of high-purity large-crystal silicon carbide powder, 20% of fused zirconia micro powder, 12% of chromium oxide fine powder, 23% of high-purity zirconia micro powder, 12% of alumina micro powder and 20% of a binding agent.
3. The anti-coking coating for the surface of the castable of the combustion chamber of the garbage incinerator according to claim 1, wherein the granularity of the high-purity large-crystal silicon carbide powder is less than or equal to 0.088mm.
4. The anti-coking coating for the surface of a castable of a combustion chamber of a garbage incinerator according to claim 1, wherein the granularity of the fused zirconia powder is less than or equal to 0.044mm.
5. The anti-coking coating for the surface of a castable of a combustion chamber of a garbage incinerator according to claim 1, wherein the granularity of the chromium oxide fine powder is less than or equal to 0.2mm.
6. The anti-coking coating for the surface of the castable of the combustion chamber of the garbage incinerator according to claim 1, wherein the high-purity zirconium boride powder is less than or equal to 0.044mm.
7. The anti-coking coating for the surface of a castable of a combustion chamber of a garbage incinerator according to claim 1, wherein the granularity of the alumina micropowder is less than or equal to 0.010mm.
8. The anti-coking coating for the surface of a castable of a combustion chamber of a garbage incinerator according to claim 1, wherein the binder is epoxy resin or polyurethane resin.
9. The method for preparing the anti-coking paint for the surface of the castable of the combustion chamber of the garbage incinerator according to claim 1, comprising the following steps:
s1, taking all raw materials according to the raw material composition of the coating of claim 1;
s2, uniformly mixing high-purity large-crystal silicon carbide powder, fused zirconia powder and high-purity zirconium boride powder, adding a binding agent, uniformly stirring, adding chromium oxide fine powder and alumina fine powder, and performing stirring ball milling to obtain the anti-coking coating.
10. The method for preparing the anti-coking coating for the surface of the castable of the combustion chamber of the garbage incinerator according to claim 9, wherein the ball milling operation conditions are as follows: the ball milling rotating speed is 250-300 r/min, the ball material mass ratio is 20-25:1, and the ball milling time is 0.5-1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410299469.3A CN118185419A (en) | 2024-03-15 | 2024-03-15 | Anti-coking coating for castable surface of combustion chamber of garbage incinerator and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410299469.3A CN118185419A (en) | 2024-03-15 | 2024-03-15 | Anti-coking coating for castable surface of combustion chamber of garbage incinerator and preparation method thereof |
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| Publication Number | Publication Date |
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| CN118185419A true CN118185419A (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410299469.3A Pending CN118185419A (en) | 2024-03-15 | 2024-03-15 | Anti-coking coating for castable surface of combustion chamber of garbage incinerator and preparation method thereof |
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| Country | Link |
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| CN (1) | CN118185419A (en) |
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