CN116676006A - High-temperature-resistant vibration-resistant paint and preparation method and application thereof - Google Patents

High-temperature-resistant vibration-resistant paint and preparation method and application thereof Download PDF

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Publication number
CN116676006A
CN116676006A CN202310696856.6A CN202310696856A CN116676006A CN 116676006 A CN116676006 A CN 116676006A CN 202310696856 A CN202310696856 A CN 202310696856A CN 116676006 A CN116676006 A CN 116676006A
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component
resistant
temperature
coating
vibration
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Inventor
王元生
曾伟涛
张庆喜
郑华伟
吴宏亮
王锡涛
凌明生
闫智勇
宋钊
王作军
蔡毅
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Co Ltd
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Priority to CN202310696856.6A priority Critical patent/CN116676006A/en
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    • C—CHEMISTRY; METALLURGY
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/06—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length by rubbing contact, e.g. by brushes, by pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B05D1/286—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers using a temporary backing to which the coating has been applied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/146—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies to metallic pipes or tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2254/00—Tubes
    • B05D2254/02—Applying the material on the exterior of the tube
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention belongs to the technical field of refractory materials, and discloses a high-temperature-resistant vibration-resistant coating, a preparation method and application thereof. The high-temperature-resistant vibration-resistant coating consists of a component A, a component B and a component C according to the mass ratio of (0.8-1) to (1-1.5) to (1), wherein the component A comprises sodium silicate aqueous solution and trimethoxysilane; the component B comprises corundum powder, nano aluminum oxide and calcium hexaluminate; component C comprises zirconium oxide, magnesium oxide and a dispersion stabilizer. The invention ensures that the coating has better reduction resistance and thermal shock resistance while resisting high temperature through the design of raw material components and the control of the consolidation process during application, can be used as a protective coating of a blast furnace hearth temperature thermocouple, and can also be used as a lining coating on the upper part of a blast furnace and equipment coatings under other high temperature and impact conditions.

Description

High-temperature-resistant vibration-resistant paint and preparation method and application thereof
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to a high-temperature-resistant vibration-resistant coating, a preparation method and application thereof.
Background
The sampling of coke at the blast furnace tuyere is to insert a sampling tube into the center of the blast furnace from the blast furnace tuyere by mechanical or hydraulic power to take out materials such as coke, slag iron and the like, and is one of important methods for researching a swirl zone of the blast furnace tuyere and a dead column of the blast furnace. A thermocouple is arranged in the sampling tube, so that the temperature of the blast furnace hearth can be measured while taking samples such as coke. The hearth temperature has important influence on slag-iron fluidity, chemical reaction and the like at the lower part of the blast furnace.
The blast furnace tuyere Jiao Quyang is usually a sheathed S-level thermocouple after the blast furnace is in a damping down state, and a protection tube of thermocouple wires of the thermocouple is high-temperature alloy steel. During temperature measurement, the outer surface of the protection tube of the thermocouple wire is contacted with high-temperature materials such as coke, molten slag iron and the like. After the blast furnace is in a damping down state, the temperature of a hearth of a tuyere plane is above 1350 ℃, a metal protection tube of the thermocouple wire is easy to soften or damage at a high temperature, the thermocouple wire cannot be effectively protected, and the temperature measuring function of the thermocouple is affected.
In order to solve the above problems, it is necessary to add a refractory coating on the outer surface of the metal protection tube of the thermocouple, thereby effectively protecting the thermocouple. The sampling process needs to use a vibrator to push the sampling tube, so that the fireproof material has the capability of resisting the high temperature of over 1350 ℃, has vibration resistance, ensures that the coating does not fall off during sampling and vibration resistance of the existing inorganic refractory materials such as magnesium oxide, plate-shaped corundum, high clay and the like under the high temperature condition is poor, and is difficult to adapt to practical application scenes.
Therefore, a high-temperature-resistant vibration-resistant coating is needed, and the coating is coated on the outer surface of the thermocouple metal protection tube to form a high-temperature-resistant vibration-resistant coating, so that the blast furnace hearth temperature thermocouple is effectively protected.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides a high-temperature-resistant vibration-resistant coating, a preparation method and application thereof, and the coating has better reduction resistance and thermal shock resistance while resisting high temperature through the design of raw material components and the control of a consolidation process during application.
In order to solve the technical problem, the invention provides a high-temperature-resistant vibration-resistant coating which consists of a component A, a component B and a component C according to the mass ratio of (0.8-1) (1-1.5) (1), wherein the component A comprises sodium silicate aqueous solution and trimethoxysilane, the component B comprises corundum powder, nano aluminum oxide and calcium hexaaluminate, and the component C comprises zirconium oxide, magnesium oxide and a dispersion stabilizer.
In the above scheme, the aqueous solution of sodium silicate contains SiO 2 The content is 25 to 30 percent, na 2 The O content is 8-15% and the modulus is 2-4.5.
In the scheme, the mass of the trimethoxysilane is 5-8% of the mass of the sodium silicate aqueous solution.
In the scheme, the corundum powder is prepared from Al 2 O 3 The content is more than or equal to 93 percent, and the grain diameter is less than or equal to 0.15mm.
In the scheme, the particle size of the nano alumina is 50-200 nm.
In the scheme, the grain size of the calcium hexaaluminate is less than or equal to 0.2mm.
In the scheme, the mass ratio of the corundum powder to the nano alumina to the calcium hexaluminate is 1 (1.5-2): 1.
In the scheme, the grain sizes of the zirconia and the magnesia are less than or equal to 0.3mm.
In the above scheme, the dispersion stabilizer is an aluminate coupling agent or a phthalylsulfonyl imide.
In the above scheme, the mass ratio of the zirconia, the magnesia and the dispersion stabilizer is 0.5 (0.3-0.5): 1.
In the scheme, na in the powder materials such as corundum powder, nano aluminum oxide, calcium hexaluminate, zirconia, magnesia and the like 2 The O content is less than 0.3 percent.
The invention also provides a preparation method of the high-temperature-resistant vibration-resistant paint, which comprises the following steps:
the component A, the component B and the component C are uniformly mixed according to the respective raw materials, the component B is added into the component A to be uniformly mixed, and finally the mixture is uniformly mixed with the component C to obtain the high-temperature-resistant vibration-resistant coating.
The invention also provides an application method of the high-temperature-resistant vibration-resistant paint, which comprises the following steps:
1) Coating a layer of high-temperature-resistant vibration-resistant paint on the outer surface of the metal protection tube of the temperature thermocouple, heating and solidifying, coating a layer of paint again, heating and solidifying, and repeating the steps until the coating formed by solidifying reaches a preset thickness;
2) And (5) carrying out heating treatment on the coating again to form the high-temperature-resistant vibration-resistant coating.
In the scheme, the thickness of single coating of the high-temperature-resistant vibration-resistant coating is 1-2 mm.
In the scheme, the total thickness of the high-temperature-resistant vibration-resistant coating is 3-5 mm.
In the scheme, the heating temperature in the step 1) is 100-150 ℃, and the single consolidation time is 16-24 hours.
In the scheme, the heating temperature in the step 2) is 100-150 ℃ and the heating time is 72-96 h.
The main technical concept of the invention is as follows:
1) The component A and the component C are mixed and heated for solidification, so that inorganic high-temperature glue can be formed; meanwhile, the nano alumina in the component B is used together with the zirconia and the magnesia in the component C, so that the anti-seismic performance of the coating under the high-temperature condition can be obviously enhanced; the grain diameter of corundum powder in the component B needs to be strictly controlled below 0.15mm, otherwise, the anti-seismic performance is obviously deteriorated; the addition of calcium hexaluminate in component B gives the coating a better resistance to reduction, because the thermocouple is used inside the blast furnace hearth, the temperature of which exceeds 1350 ℃, and the blast furnace gas contains CO 2 Fe in powder materials such as reducing gas, corundum powder and the like 2 O 3 The reduction reaction is easy to occur, and the anti-seismic performance of the coating is affected.
2) Strictly controlling Na in various powders 2 O content due to Na 2 O can influence the compactness of the coating, na 2 O is combined with Al 2 O 3 To produce beta-Al with certain conductivity 2 O 3 Can affect the service performance of the coating.
3) When in use, the temperature and time for heating and solidifying are ensured, the water content of the coating is ensured to be controlled below 0.05 percent, otherwise, H is ensured under the high temperature condition 2 O will be equal to Al 2 O 3 Formation of Al (OH) 3 ，Al(OH) 3 CO in blast furnace gas and under high temperature conditions 2 The reduction reaction occurs, and the anti-seismic performance of the coating is affected.
Compared with the prior art, the invention has the beneficial effects that:
the invention, through the design of raw material components and the control of consolidation process during application, makes the coating have better reduction resistance and thermal shock resistance at the same time of high temperature resistance, can be used as a protective coating of a blast furnace hearth temperature thermocouple, does not fall off under the conditions of 200kg of impact energy and 200-300 times/min of vibration impact at the temperature of over 1350 ℃, effectively protects the temperature thermocouple, and can also be used as an upper lining coating of a blast furnace and other equipment coatings under high temperature and impact conditions.
Detailed Description
For a better understanding of the present invention, the following examples are further illustrated, but are not limited to the following examples.
In the following examples, na was contained in corundum powder, nano-alumina, calcium hexaaluminate, zirconia, magnesia and other powders 2 The O content is less than 0.3 percent.
Example 1
A high temperature resistant vibration resistant paint comprises the following raw materials:
1) Component A: aqueous sodium silicate Solution (SiO) 2 Content 25%, na 2 10% of O, 2.58% of modulus), and 5% of trimethoxysilane by mass of sodium silicate aqueous solution;
2) Component B: corundum powder (Al) 2 O 3 95% of the calcium aluminate powder, the grain diameter is less than or equal to 0.1 mm), nano alumina (the grain diameter is 50 nm), and calcium hexaaluminate (the grain diameter is less than or equal to 0.15 mm), wherein the mass ratio is 1:1.8:1;
3) Component C: zirconia (particle size less than or equal to 0.2 mm), magnesia (particle size less than or equal to 0.2 mm), aluminate coupling agent, and the mass ratio is 0.5:0.4:1;
the mass ratio of the component A to the component B to the component C is 0.9:1.2:1.
The preparation method of the high-temperature-resistant vibration-resistant paint comprises the following steps: the component A, the component B and the component C are uniformly mixed according to the respective raw materials, the component B is added into the component A to be uniformly mixed, and finally the mixture is uniformly mixed with the component C to obtain the high-temperature-resistant vibration-resistant coating.
The high-temperature-resistant vibration-resistant coating is applied to protecting a blast furnace hearth temperature thermocouple, and the application method comprises the following steps:
1) Coating a layer of high-temperature-resistant vibration-resistant paint on the outer surface of the temperature thermocouple metal protection tube, wherein the thickness of the single coating is 1mm, solidifying for 16 hours at the constant temperature of 120 ℃, coating a layer, solidifying for 16 hours at the constant temperature of 120 ℃, and repeating the steps until the total thickness of the solidified coating is 3mm;
2) And (3) keeping the temperature of the coating at 120 ℃ for 72 hours again to form the high-temperature-resistant vibration-resistant coating.
When the temperature thermocouple is used for measuring the temperature of a blast furnace hearth, under the conditions of the temperature of above 1350 ℃ and 200kg of beating impact energy and 200-300 times/min of impact frequency, the phenomenon that the high-temperature-resistant and vibration-resistant coating on the outer surface of the metal protection tube of the temperature thermocouple falls off is not found, which indicates that the thermal shock resistance is good.
Example 2
A high temperature resistant vibration resistant paint comprises the following raw materials:
1) Component A: aqueous sodium silicate Solution (SiO) 2 30% of Na 2 O content 8%, modulus 3.88), trimethoxysilane 7% of sodium silicate aqueous solution mass;
2) Component B: corundum powder (Al) 2 O 3 95% of the aluminum oxide powder, 0.1mm of particle size), nano aluminum oxide (100 nm of particle size) and calcium hexaaluminate (0.15 mm of particle size) in a mass ratio of 1:2:1;
3) Component C: zirconium oxide (particle size 0.2 mm), magnesium oxide (particle size 0.2 mm), and phthalylsulfonyl imide with a mass ratio of 0.5:0.5:1;
the mass ratio of the component A to the component B to the component C is 1:1.5:1.
The preparation method of the high-temperature-resistant vibration-resistant paint comprises the following steps: the component A, the component B and the component C are uniformly mixed according to the respective raw materials, the component B is added into the component A to be uniformly mixed, and finally the mixture is uniformly mixed with the component C to obtain the high-temperature-resistant vibration-resistant coating.
The high-temperature-resistant vibration-resistant coating is applied to protecting a blast furnace hearth temperature thermocouple, and the application method comprises the following steps:
1) Coating a layer of high-temperature-resistant vibration-resistant paint on the outer surface of the metal protection tube of the temperature thermocouple, wherein the thickness of the single coating is 2mm, solidifying for 18h at a constant temperature of 150 ℃, coating a layer, solidifying for 18h at a constant temperature of 150 ℃, and repeating the steps until the total thickness of the solidified coating is 4mm;
2) And (3) keeping the temperature of the coating at 150 ℃ for 84 hours again to form the high-temperature-resistant vibration-resistant coating.
When the temperature thermocouple is used for measuring the temperature of a blast furnace hearth, under the conditions of the temperature of above 1350 ℃ and 200kg of beating impact energy and 200-300 times/min of impact frequency, the phenomenon that the high-temperature-resistant and vibration-resistant coating on the outer surface of the metal protection tube of the temperature thermocouple falls off is not found, which indicates that the thermal shock resistance is good.
Example 3
A high temperature resistant vibration resistant paint comprises the following raw materials:
1) Component A: aqueous sodium silicate Solution (SiO) 2 Content of 28%, na 2 14% of O, 2.07% of modulus), and 8% of trimethoxysilane by mass of sodium silicate aqueous solution;
2) Component B: corundum powder (Al) 2 O 3 95% of the aluminum oxide powder, 0.05mm of particle size), nano aluminum oxide (200 nm of particle size) and calcium hexaaluminate (0.1 mm of particle size) in a mass ratio of 1:1.5:1;
3) Component C: zirconia (particle size 0.1 mm), magnesia (particle size 0.1 mm), aluminate coupling agent, mass ratio 0.5:0.3:1;
the mass ratio of the component A to the component B to the component C is 0.8:1:1.
The preparation method of the high-temperature-resistant vibration-resistant paint comprises the following steps: the component A, the component B and the component C are uniformly mixed according to the respective raw materials, the component B is added into the component A to be uniformly mixed, and finally the mixture is uniformly mixed with the component C to obtain the high-temperature-resistant vibration-resistant coating.
The high-temperature-resistant vibration-resistant coating is applied to protecting a blast furnace hearth temperature thermocouple, and the application method comprises the following steps:
1) Coating a layer of high-temperature-resistant vibration-resistant paint on the outer surface of the metal protection tube of the temperature thermocouple, wherein the thickness of the single coating is 1.5mm, solidifying for 24 hours at the constant temperature of 100 ℃, coating a layer, solidifying for 24 hours at the constant temperature of 100 ℃, and repeating the steps until the total thickness of the solidified coating is 4.5mm;
2) And (3) keeping the temperature of the coating for 96 hours at 100 ℃ again to form the high-temperature-resistant vibration-resistant coating.
When the temperature thermocouple is used for measuring the temperature of a blast furnace hearth, under the conditions of the temperature of above 1350 ℃ and 200kg of beating impact energy and 200-300 times/min of impact frequency, the phenomenon that the high-temperature-resistant and vibration-resistant coating on the outer surface of the metal protection tube of the temperature thermocouple falls off is not found, which indicates that the thermal shock resistance is good.
The above examples are presented for clarity of illustration only and are not limiting of the embodiments. Other variations or modifications of the above description will be apparent to those of ordinary skill in the art, and it is not necessary or exhaustive of all embodiments, and thus all obvious variations or modifications that come within the scope of the invention are desired to be protected.

Claims (10)

1. The high temperature resistant vibration resistant paint is characterized by comprising a component A, a component B and a component C according to the mass ratio of (0.8-1) (1-1.5) (1), wherein the component A comprises sodium silicate aqueous solution and trimethoxysilane, the component B comprises corundum powder, nano aluminum oxide and calcium hexaaluminate, the component C comprises zirconium oxide, magnesium oxide and a dispersion stabilizer, and the dispersion stabilizer is an aluminate coupling agent or o-benzoyl sulfonyl imide.
2. The high temperature resistant vibration resistant coating according to claim 1, wherein the aqueous sodium silicate solution has SiO 2 The content is 25 to 30 percent, na 2 The O content is 8-15%, and the modulus is 2-4.5; the weight of the trimethoxy silane is 5-8% of the weight of the sodium silicate aqueous solution.
3. The high temperature resistant vibration resistant coating according to claim 1, wherein the corundum powder is Al 2 O 3 The content is more than or equal to 93 percent, and the grain diameter is less than or equal to 0.15mm; the particle size of the nano alumina is 50-200 nm; the grain diameter of the calcium hexaluminate is less than or equal to 0.2mm; the grain sizes of the zirconia and the magnesia are less than or equal to 0.3mm.
4. The high-temperature-resistant vibration-resistant coating according to claim 1, wherein the mass ratio of corundum powder to nano aluminum oxide to calcium hexaaluminate is 1 (1.5-2): 1; the mass ratio of the zirconia to the magnesia to the dispersion stabilizer is 0.5 (0.3-0.5): 1.
5. The high temperature resistant vibration resistant coating according to claim 1, wherein Na of corundum powder, nano aluminum oxide, calcium hexaaluminate, zirconium oxide, magnesium oxide 2 The O content is less than 0.3 percent.
6. A method for preparing the high temperature resistant and vibration resistant paint according to any one of claims 1 to 5, comprising the steps of: the component A, the component B and the component C are uniformly mixed according to the respective raw materials, the component B is added into the component A to be uniformly mixed, and finally the mixture is uniformly mixed with the component C to obtain the high-temperature-resistant vibration-resistant coating.
7. A method of applying the high temperature resistant vibration resistant coating according to any one of claims 1 to 5, comprising the steps of:
1) Coating a layer of high-temperature-resistant vibration-resistant paint on the outer surface of the metal protection tube of the temperature thermocouple, heating and solidifying, coating a layer of paint again, heating and solidifying, and repeating the steps until the coating formed by solidifying reaches a preset thickness;
2) And (5) carrying out heating treatment on the coating again to form the high-temperature-resistant vibration-resistant coating.
8. The method of claim 7, wherein the single coating thickness of the high temperature resistant and vibration resistant coating is 1-2 mm, and the total thickness of the formed coating is 3-5 mm.
9. The method of claim 7, wherein the heating temperature in step 1) is 100-150 ℃ and the single consolidation time is 16-24 hours.
10. The method of claim 7, wherein the heating temperature in step 2) is 100-150 ℃ and the heating time is 72-96 hours.
CN202310696856.6A 2023-06-13 2023-06-13 High-temperature-resistant vibration-resistant paint and preparation method and application thereof Pending CN116676006A (en)

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