CN107010932A - High temperature liner body skin patching material - Google Patents
High temperature liner body skin patching material Download PDFInfo
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- CN107010932A CN107010932A CN201710321975.8A CN201710321975A CN107010932A CN 107010932 A CN107010932 A CN 107010932A CN 201710321975 A CN201710321975 A CN 201710321975A CN 107010932 A CN107010932 A CN 107010932A
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- body skin
- liner body
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- 239000000463 material Substances 0.000 title claims abstract description 40
- 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 28
- 239000000843 powder Substances 0.000 claims abstract description 25
- 238000000265 homogenisation Methods 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 10
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 239000007767 bonding agent Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 230000032683 aging Effects 0.000 claims abstract description 7
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 7
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 6
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 239000003755 preservative agent Substances 0.000 claims abstract description 6
- 239000004014 plasticizer Substances 0.000 claims abstract description 5
- 239000008187 granular material Substances 0.000 claims abstract description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 15
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000010452 phosphate Substances 0.000 claims description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 8
- 235000012216 bentonite Nutrition 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 6
- 235000006408 oxalic acid Nutrition 0.000 claims description 6
- 238000013019 agitation Methods 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 229910052594 sapphire Inorganic materials 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract description 2
- 229910000278 bentonite Inorganic materials 0.000 description 4
- 239000000440 bentonite Substances 0.000 description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000006052 feed supplement Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- VSKBCRUQHHGABO-UHFFFAOYSA-N [Al].[H][H].[H][H].[H][H] Chemical compound [Al].[H][H].[H][H].[H][H] VSKBCRUQHHGABO-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002742 anti-folding effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- C04B35/101—Refractories from grain sized mixtures
-
- 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
- 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
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- 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
-
- 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
- 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
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate or hypophosphite
-
- 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
- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5212—Organic
-
- 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
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a kind of high temperature liner body skin patching material, prepared by following raw material in mass fraction ratio, coarse granule is Al2O3Content is not less than 80% alumina homogenization material and accounts for 35~40 parts, and fine grained is that brown alundum powder accounts for 20~25 parts, and fine powder is Al2O3Content is not less than 85 high grade bauxite homogenization materials and accounts for 25~30 parts, active alpha Al2O3Account for 5~6 parts, high-quality fine silica powder accounts for 3~5 parts, 5~7 parts of plasticizer, 1.0~2.0 parts of preservative agent, and explosion-proof fiber powder accounts for 0.05 part.Bonding agent is added, first time stirring is carried out, machine is gone out after being well mixed, ageing mixture more than 24 hours then carries out stirring for second, adds bonding agent of the same race, material for repairing is made after extruder extrusion process after stirring.The present invention has that intensity is high, heat conduction is fast, high temperature, erosion resistant is good, high temperature abrasion resistance is good, adhesive capacity is difficult to peel off by force, quick construction good with original wall body associativity, and construction can be rapidly heated operation after terminating, it is ensured that Thermal Equipment/high temperature kiln safety period is run.
Description
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of high temperature liner body skin patching material.
Background technology
Electricity generation boiler, waste incinerator and other high temperature kilns in operation process, furnace wall due to subject high temperature always,
Furnace wall inwall bears stronger scouring force, and top layer is easily ftractureed peeling, ultimately results in furnace wall inwall impaired, it is necessary to be repaiied in time
Mend.Setting time is longer after refractory material repairing used in advance, and kiln can not heat up operation at once, and the wall after repairing is resistance to
High-temperature behavior is poor, and the associativity with original wall body is bad, and wearability can not meet use requirement.
The content of the invention
There is provided a kind of wearability is strong, hardening is fast, high-temperature behavior in order to solve weak point of the prior art by the present invention
The strong high temperature liner body skin patching material of good, cohesive force.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：High temperature liner body skin patching material, by following original
Material is prepared in mass fraction ratio, and coarse granule is Al2O3The alumina homogenization material that content is not less than 80% accounts for 35~40 parts, and fine grained is
Brown Alundum powder accounts for 20~25 parts, Al2O3Content is not less than 85% 25~30 parts of high grade bauxite homogenization material fine powder, active alpha-Al2O3
Account for 5~6 parts, high-quality fine silica powder accounts for 3~5 parts, 5~7 parts of plasticizer, 1.0~2.0 parts of preservative agent, and explosion-proof fiber is accounted for
0.05 part；
Above-mentioned raw materials precise is poured into machine mixer according to stirring equipment volume size, bonding agent 6.0~7.0 is added
Part, 3~5min is stirred, machine is gone out after being well mixed, then ageing mixture more than 24 hours carries out second of mechanical agitation, add of the same race
7.5-8.5 parts of bonding agent 3~5min of stirring, be made material for repairing after extruder extrusion process, material for repairing is with well may be used
The moulded pottery not yet put in a kiln to bake shape of plasticity, finished product uses 25kg/ bags of double braid bag packaging.
Coarse grained Al2O3It in 80% alumina homogenization material containing 5~3mm particle diameters is 15~20 parts that content, which is, contains 3~1mm
Particle diameter is 20~25 parts；The particle diameter of fine grained Brown Alundum powder is 1~0mm, accounts for 20~25 parts.
Described bonding agent uses proportion for 1.47~1.55 phosphate dihydrogen aluminum solutions.
Plasticizer uses 2~3 parts of bentonites and 3~4 parts of Guangxi white clay, and preservative agent uses oxalic acid.
Using above-mentioned technical proposal, the alumina homogenization material that is used in dispensing, Brown Alundum is principal ingredients, with preferable heat
State intensity；Phosphate dihydrogen aluminum solution feature：With refractory aggregate, after powder and the addition mixing such as composition between 90-110 °C constant temperature
Form high-adhesive-strength within 4-24 hours, just there is higher anti-folding, resistance to compression, erosion-resisting characteristics after 350-500 °C dries.α-
Al2O3Addition can improve intensity after the burning of product.Bentonite and Guangxi white clay help to strengthen plasticity.Oxalic acid is used as preservative agent
It can prevent or delay the sclerous reaction during ageing mixture between raw material.Fine silica powder possess good temperature tolerance, acid-alkali-corrosive-resisting,
The excellent performance such as stable chemical performance.Explosion-proof fiber is, using polypropylene as raw material, to be fabricated by by special process, with
Other refractory materials be well mixed, after shaping, toasted, as baking temperature is constantly raised, and when reaching certain temperature this
It is to start to soften, shrink, melt to plant fiber, eventually forms stomata and is carbonized, and in construction, distribution forms small network in vivo for they
Stomata, it can open aqueous vapor passage, mitigate internal stress, prevent explosion, improve a kind of specialty fibers of whole service life.
In summary, the present invention has intensity height, high temperature, erosion resistant is good, high temperature abrasion resistance is good, adhesive capacity is difficult by force
Peel off, quick construction good with former furnace wall associativity, the good characteristics such as operation that can be rapidly heated after terminating of constructing, it is ensured that Re Gongshe
Standby/high temperature kiln safety period operation.
Embodiment
Technical scheme is described further in conjunction with the embodiments.
Embodiment 1
The high temperature liner body skin patching material of the present invention, is prepared, coarse grained Al by following raw material in mass fraction ratio2O3Content
It it is 22 parts containing 3~1mm particle diameters containing 5-3mm particle diameters to be 16 parts in 80% alumina homogenization material, particle diameter is that 1-0mm is fine grain
22 parts of brown alundum powder, Al-85 high grade bauxite homogenization materials（320 mesh）25 parts of fine powder, active alpha-Al2O3Account for 5 parts, high-quality silica
Micro mist accounts for 4 parts, 2 parts of bentonite, 4 parts of Guangxi white clay, 1 part of oxalic acid, and explosion-proof fiber powder accounts for 0.05 part；Above-mentioned raw materials add proportion
6 parts of 1.47 phosphate dihydrogen aluminum solution, carries out first time mechanical agitation mixing, ageing mixture more than 24 hours after being well mixed, then the
Secondary mechanical is stirred, and same proportion is added for 8 parts of 1.47-1.55 phosphate dihydrogen aluminum solutions, after extruder extrusion process
Material for repairing is made, material for repairing is in the moulded pottery not yet put in a kiln to bake shape with good plasticity, finally using 25kg/ bags of double braid bag packaging.
Embodiment 2
The high temperature liner body skin patching material of the present invention, is prepared, coarse grained Al by following raw material in mass fraction ratio2O3Content
It it is 20 parts containing 3~1mm particle diameters containing 5-3mm particle diameters to be 18 parts in 80% alumina homogenization material, particle diameter is that 1-0mm is fine grain
23 parts of brown alundum powder, 25 parts of Al-85 high grade bauxite homogenization materials fine powder, active alpha-Al2O35 parts are accounted for, high-quality fine silica powder accounts for 3
Part, 2.5 parts of bentonite, Guangxi white clay accounts for 3.5 parts, 2 parts of oxalic acid, and explosion-proof fiber powder accounts for 0.05 part；Above-mentioned raw materials add proportion
7 parts of 1.50 phosphate dihydrogen aluminum solution, carries out first time mechanical agitation mixing, ageing mixture more than 24 hours after being well mixed, then the
Secondary mechanical is stirred, and is added same proportion for 8 parts of 1.50 phosphate dihydrogen aluminum solution, is made and repaiies after extruder extrusion process
Feed supplement, material for repairing is in the moulded pottery not yet put in a kiln to bake shape with good plasticity, finally using 25kg/ bags of double braid bag packaging.
Embodiment 3
The high temperature liner body skin patching material of the present invention, is prepared, coarse grained Al by following raw material in mass fraction ratio2O3Content
It it is 23 parts containing 3~1mm particle diameters containing 5-3mm particle diameters to be 18 parts in 80% alumina homogenization material, particle diameter is that 1-0mm is fine grain
20 parts of brown alundum powder, 23 parts of Al-85 high grade bauxite homogenization materials fine powder, active alpha-Al2O36 parts are accounted for, high-quality fine silica powder accounts for 4
Part, 2 parts of bentonite, 4 parts of Guangxi white clay, 1 part of oxalic acid, explosion-proof fiber powder accounts for 0.05 part；It is 1.55 phosphorus that above-mentioned raw materials, which add proportion,
6 parts of acid dihydride aluminum solutions, carry out first time mechanical agitation mixing, ageing mixture more than 24 hours after being well mixed, then second of machinery
Stirring, adds same proportion for 8 parts of 1.55 phosphate dihydrogen aluminum solution, material for repairing is made after extruder extrusion process, repaiies
Feed supplement is in the mud bad shape with good plasticity, finally using 25kg/ bags of double braid bag packaging.
The present embodiment not makees any formal limitation to shape, material, structure of the present invention etc., every according to this hair
Any simple modification, equivalent variations and modification that bright technical spirit is made to above example, belong to the technology of the present invention side
The protection domain of case.
Claims (4)
1. high temperature liner body skin patching material, it is characterised in that：Prepared by following raw material in mass fraction ratio, coarse granule is Al2O3
The alumina homogenization material that content is not less than 80% accounts for 35~40 parts, and fine grained is that Brown Alundum powder accounts for 20~25 parts, Al2O3Content is not low
In 85% 25~30 parts of high grade bauxite homogenization material fine powder, active alpha-Al2O35~6 parts are accounted for, high-quality fine silica powder accounts for 3~5 parts,
5~7 parts of plasticizer, 1.0~2.0 parts of preservative agent, explosion-proof fiber accounts for 0.05 part；
Above-mentioned raw materials precise is poured into machine mixer according to stirring equipment volume size, bonding agent 6.0~7.0 is added
Part, 3~5min is stirred, machine is gone out after being well mixed, then ageing mixture more than 24 hours carries out second of mechanical agitation, add of the same race
7.5-8.5 parts of bonding agent 3~5min of stirring, be made material for repairing after extruder extrusion process, material for repairing is with well may be used
The moulded pottery not yet put in a kiln to bake shape of plasticity, finished product uses 25kg/ bags of double braid bag packaging.
2. high temperature liner body skin patching material according to claim 1, it is characterised in that：Coarse grained Al2O3Content is 80%
It is 15~20 parts to contain 5~3mm particle diameters in alumina homogenization material, is 20~25 parts containing 3~1mm particle diameters；Fine grained brown alundum powder
The particle diameter of material is 1~0mm, accounts for 20~25 parts.
3. high temperature liner body skin patching material according to claim 1, it is characterised in that：Described bonding agent use proportion for
1.47~1.55 phosphate dihydrogen aluminum solutions.
4. high temperature liner body skin patching material according to claim 1, it is characterised in that：Plasticizer is using 2~3 parts of bentonites
With 3~4 parts of Guangxi white clay, preservative agent uses oxalic acid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710321975.8A CN107010932A (en) | 2017-05-09 | 2017-05-09 | High temperature liner body skin patching material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710321975.8A CN107010932A (en) | 2017-05-09 | 2017-05-09 | High temperature liner body skin patching material |
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| CN107010932A true CN107010932A (en) | 2017-08-04 |
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| CN201710321975.8A Pending CN107010932A (en) | 2017-05-09 | 2017-05-09 | High temperature liner body skin patching material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556008A (en) * | 2017-10-09 | 2018-01-09 | 郑州耐都热陶瓷有限公司 | CFBB abrasion-proof fire-resistant moldable refractory |
| CN109622935A (en) * | 2019-01-31 | 2019-04-16 | 武汉钢铁有限公司 | Molten iron drossing plate and application method |
| CN109824371A (en) * | 2019-03-28 | 2019-05-31 | 武汉科技大学 | A kind of gasification furnace work lining fire-proof spray coating and preparation method thereof |
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| CN109622935A (en) * | 2019-01-31 | 2019-04-16 | 武汉钢铁有限公司 | Molten iron drossing plate and application method |
| CN109622935B (en) * | 2019-01-31 | 2021-04-30 | 武汉钢铁有限公司 | Molten iron slag removing plate and using method thereof |
| CN109824371A (en) * | 2019-03-28 | 2019-05-31 | 武汉科技大学 | A kind of gasification furnace work lining fire-proof spray coating and preparation method thereof |
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Application publication date: 20170804 |