CN110590383A - Thermal state repairing spray coating and preparation method thereof - Google Patents
Thermal state repairing spray coating and preparation method thereof Download PDFInfo
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- CN110590383A CN110590383A CN201910783154.5A CN201910783154A CN110590383A CN 110590383 A CN110590383 A CN 110590383A CN 201910783154 A CN201910783154 A CN 201910783154A CN 110590383 A CN110590383 A CN 110590383A
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- 238000005507 spraying Methods 0.000 title claims abstract description 11
- 238000002360 preparation method Methods 0.000 title abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 22
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004327 boric acid Substances 0.000 claims abstract description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000004568 cement Substances 0.000 claims abstract description 15
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 15
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 14
- 239000010431 corundum Substances 0.000 claims abstract description 14
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 18
- 229910052710 silicon Inorganic materials 0.000 claims description 15
- 239000010703 silicon Substances 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- 238000000227 grinding Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 4
- 230000003628 erosive effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/402—Aluminium
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
The invention belongs to the technical field of spray coatings, and particularly relates to a thermal state repairing spray coating for rapidly repairing a working area in a thermal state and a preparation method thereof. The invention comprises the following components in percentage by weight: 70-76% of brown corundum, 4.5-5.5% of Guangxi white mud, 4.5-5.5% of pure calcium aluminate 70 cement, 1.5-2.5% of boric acid, 4.5-5.5% of silicon metal, 1.5-2.5% of aluminum metal and 7-9% of silicon carbide. The invention can quickly repair the conditions of serious local erosion, peeling or local damage in the using process of the working lining in a hot state, and the finished product prepared by the invention has good bonding, high strength and long service life.
Description
Technical Field
The invention belongs to the technical field of spray paint, and particularly relates to thermal state repairing spray paint capable of rapidly repairing local damage of a working lining in a thermal state and a preparation method thereof.
Background
The continuous casting tundish lining is generally composed of a permanent lining and a working lining, the permanent lining is generally integrally cast by adopting a casting material, and the working lining is generally constructed by adopting a magnesium coating material or a dry material. In the using process of the working lining, the working lining can be seriously corroded, peeled off or damaged locally, the normal use is influenced, the working lining needs to be shut down for maintenance or demolished, the loss and the waste are large, in the prior art, the working lining can be repaired after being cooled to the normal temperature, and a spray coating for rapidly repairing in a hot state and a preparation method of the spray coating are lacked.
Disclosure of Invention
The invention aims to provide a thermal state repairing spray coating capable of quickly repairing local damage of a working lining in a thermal state and a preparation method thereof.
Based on the purpose, the invention adopts the following technical scheme:
the hot repairing spray coating comprises the following components in percentage by weight:
70-76% of brown corundum, 4.5-5.5% of Guangxi white mud, 4.5-5.5% of pure calcium aluminate 70 cement, 1.5-2.5% of boric acid, 4.5-5.5% of silicon metal, 1.5-2.5% of aluminum metal and 7-9% of silicon carbide.
Preferably, the composition comprises the following components in percentage by weight:
73% of brown corundum, 5% of Guangxi white mud, 5% of pure calcium aluminate cement, 2% of boric acid, 5% of metal silicon, 2% of metal aluminum and 8% of silicon carbide.
A preparation method of a thermal state repairing spray coating comprises the following steps:
s1: mixing Guangxi white mud and boric acid fully to obtain a mixture 1 for later use;
s2: fully mixing metal silicon and metal aluminum to obtain a mixture 2 for later use;
s3: fully mixing brown corundum, cement and silicon carbide to obtain a mixture 3 for later use;
s4: and adding the mixture 3 into a stirrer, mixing and grinding for 5 minutes, adding the mixture 2, mixing and grinding for 5 minutes, and finally adding the mixture 1, mixing and grinding for 15 minutes to obtain a finished product.
Advantageous effects
According to the invention, the boric acid is added, so that the low-temperature strength is increased, and the phenomena of infirm adhesion and block falling are prevented. The addition of metal silicon and metal aluminum improves the oxidation resistance and the anti-explosion performance. The addition of Guangxi white mud and cement improves the bonding property and high-temperature sintering property. The addition of silicon carbide improves the heat conductivity and high-temperature thermal stability. The compression strength of the spray coating prepared by the invention is more than 35 at 110 ℃ for 24 h; the compressive strength is more than 50 at 1350 ℃ for 4 h. The invention can quickly repair the conditions of serious local erosion, peeling or local damage in the using process of the working lining in a hot state, and the finished product prepared by the invention has good bonding, high strength and long service life.
Detailed description of the invention
In the following examples, the brown alumina was made of Sanmen Xia capacitive corundum Co.Ltd, the Guangxi white mud was made of Guangxi Weiro mining Co.Ltd, the pure calcium aluminate cement was made of Tianjin Lau pure calcium aluminate 70 cement, the boric acid was Russian imported boric acid, the metallic silicon was made of Anyang Dingxing metallurgy Co.Ltd, the metallic aluminum was made of Luoyang discoverer aluminum Co.Ltd, and the silicon carbide was made of Ningyangtong Co.Ltd.
Boric acid can increase low-temperature sintering strength, and the metal silicon has stronger oxidation resistance. The brown corundum has good compactness and low water absorption, and the Guangxi white mud increases the medium-high temperature strength and improves the adhesive force. The metal aluminum has stronger oxidation resistance, anti-burst performance and water reducing performance, and the silicon carbide has better heat conducting performance and thermal stability.
The following examples were prepared according to the following procedure:
(1) mixing Guangxi white mud and boric acid fully to obtain a mixture 1 for later use;
(2) fully mixing metal silicon and metal aluminum to obtain a mixture 2 for later use;
(3) fully mixing brown corundum, cement and silicon carbide to obtain a mixture 3 for later use;
(4) and adding the mixture 3 into a stirrer, mixing and grinding for 5 minutes, adding the mixture 2, mixing and grinding for 5 minutes, and finally adding the mixture 1, mixing and grinding for 15 minutes to obtain a finished product.
In the examples, the pressure resistance of the spray paint was measured by controlling the amounts of boric acid, silicon metal and aluminum metal.
Example 1
The weight percentage ratio of the components is as follows: 73% of brown corundum, 5% of Guangxi white mud, 5% of pure calcium aluminate cement, 2% of boric acid, 5% of metal silicon, 2% of metal aluminum and 8% of silicon carbide.
Example 2
The weight percentage ratio of the components is as follows: 73% of brown corundum, 5% of Guangxi white mud, 5% of pure calcium aluminate cement, 0.5% of boric acid, 2% of metallic silicon, 0.5% of metallic aluminum and 8% of silicon carbide.
Example 3
The weight percentage ratio of the components is as follows: 73% of brown corundum, 5% of Guangxi white mud, 5% of pure calcium aluminate cement, 1% of boric acid, 3% of metal silicon, 1% of metal aluminum and 8% of silicon carbide.
Example 4
The weight percentage ratio of the components is as follows: 73% of brown corundum, 5% of Guangxi white mud, 5% of pure calcium aluminate cement, 3% of boric acid, 7% of metal silicon, 3% of metal aluminum and 8% of silicon carbide.
Test example: the compressive strength was measured by sintering example 1 to 110 ℃, holding for 24 hours and 1350 ℃, holding for 4 hours, and the compressive strength was measured by sintering the samples prepared in examples 2-4 to 1350 ℃, holding for 4 hours, and the test results are given in the following table:
and (4) conclusion:
when the addition amount of boric acid is 0.5%, the addition amount of silicon metal is 2% and the addition amount of aluminum metal is 0.5%, the pressure resistance is 25 ℃ at 1350 ℃ for 4 h. When the adding amount of boric acid is 1 percent, the adding amount of metal silicon is 3 percent and the adding amount of metal aluminum is 1 percent, the withstand voltage 11350 ℃ multiplied by 4h is 30. When the adding amount of boric acid is 3 percent, the adding amount of silicon metal is 7 percent and the adding amount of aluminum metal is 3 percent, the pressure resistance is 23 ℃ multiplied by 4h at 1350 ℃. Through increasing or decreasing the adding amount of the boric acid, the metal silicon and the metal aluminum, the thermal state performance does not reach the optimal value, and finally the adding amount of the boric acid is determined to be 2%, the adding amount of the metal silicon is determined to be 5%, the adding amount of the metal aluminum is determined to be 2%, and the thermal state performance can reach the optimal value.
Claims (3)
1. The hot repairing spray coating is characterized by comprising the following components in percentage by weight:
70-76% of brown corundum, 4.5-5.5% of Guangxi white mud, 4.5-5.5% of pure calcium aluminate 70 cement, 1.5-2.5% of boric acid, 4.5-5.5% of silicon metal, 1.5-2.5% of aluminum metal and 7-9% of silicon carbide.
2. The hot repair spray according to claim 1, comprising the following components in weight percent:
73% of brown corundum, 5% of Guangxi white mud, 5% of pure calcium aluminate cement, 2% of boric acid, 5% of metal silicon, 2% of metal aluminum and 8% of silicon carbide.
3. The method of claim 1, comprising the steps of:
s1: mixing Guangxi white mud and boric acid fully to obtain a mixture 1 for later use;
s2: fully mixing metal silicon and metal aluminum to obtain a mixture 2 for later use;
s3: fully mixing brown corundum, cement and silicon carbide to obtain a mixture 3 for later use;
s4: and adding the mixture 3 into a stirrer, mixing and grinding for 5 minutes, adding the mixture 2, mixing and grinding for 5 minutes, and finally adding the mixture 1, mixing and grinding for 15 minutes to obtain a finished product.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111116151A (en) * | 2019-12-26 | 2020-05-08 | 中冶建筑研究总院有限公司 | High-temperature resistant consolidation material and construction method thereof |
CN112174683A (en) * | 2020-10-19 | 2021-01-05 | 莱芜钢铁集团新兴液气有限公司 | Repairing material for ladle cover of thermal-state tundish and construction method thereof |
CN113200757A (en) * | 2021-04-30 | 2021-08-03 | 郑州东豫新材料科技有限公司 | Thermal-state repairing material for kiln and using method thereof |
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CN106116611A (en) * | 2016-06-30 | 2016-11-16 | 河南和成无机新材料股份有限公司 | A kind of main trough of blast furnace working lining hot jetting material and preparation method thereof |
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2019
- 2019-08-23 CN CN201910783154.5A patent/CN110590383A/en active Pending
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US4021254A (en) * | 1975-03-25 | 1977-05-03 | Mortl Gunther L | Refractories using boric acid and water soluble alcohol binder |
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CN111116151A (en) * | 2019-12-26 | 2020-05-08 | 中冶建筑研究总院有限公司 | High-temperature resistant consolidation material and construction method thereof |
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