CN108530040A - Castable refractory and ladle baking burner for ladle baking burner - Google Patents

Castable refractory and ladle baking burner for ladle baking burner Download PDF

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Publication number
CN108530040A
CN108530040A CN201710121285.8A CN201710121285A CN108530040A CN 108530040 A CN108530040 A CN 108530040A CN 201710121285 A CN201710121285 A CN 201710121285A CN 108530040 A CN108530040 A CN 108530040A
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China
Prior art keywords
castable refractory
burner
ladle baking
baking burner
good
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Pending
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CN201710121285.8A
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Chinese (zh)
Inventor
朱永军
贾鸿明
侯志昌
赵红波
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SHANGHAI ANCHOR TECHNOLOGY Co Ltd
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SHANGHAI ANCHOR TECHNOLOGY Co Ltd
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Priority to CN201710121285.8A priority Critical patent/CN108530040A/en
Publication of CN108530040A publication Critical patent/CN108530040A/en
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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
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • 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
    • C04B2235/32—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)
    • 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
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
    • 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
    • C04B2235/50—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
    • C04B2235/5216—Inorganic
    • 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
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • C04B2235/6022—Injection moulding
    • 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
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • 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)
  • Inorganic Chemistry (AREA)
  • Ceramic Products (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

The present invention provides a kind of castable refractory and ladle baking burner for ladle baking burner, the castable refractory by mass percentage, including following components：50% ~ 85% bauxite chamotte, 2% ~ 10% pure calcium aluminate cement, 10% ~ 25% alumina powder, 2% ~ 10% ultrafine silica powder and 1% ~ 5% stainless steel steel fibre.The castable refractory has many advantages, such as that bulk density is high, the porosity is low, refractoriness is high, high-temperature-resistant gas washes away, pressure-resistant wear-resisting property is good and thermal shock performance is good；It is good using the ladle baking burner performance of the castable refractory, the service life is longer, is not in that crackle, monoblock fall off and phenomena such as falling off successively after spot is played on surface in use, reduces the replacement frequency of burner spare part, extend the time between overhauls(TBO), saves cost.

Description

Castable refractory and ladle baking burner for ladle baking burner
Technical field
The invention belongs to field of material technology, and in particular to a kind of low cost is used for the castable refractory of ladle baking burner And ladle baking burner.
Background technology
Ladle baking generally uses regenerative combustion technology at present.In the design of conventional burner, nozzle structure is simple, Flame temperature is low, and nozzle mostly uses heat resisting steel making.After regenerative combustion technology, it is pre- that air passes through heat storage before combustion To 900 DEG C or so, flame temperature greatly improves heat.In the design of heat-accumulating burner, common heat resisting steel, which has been unable to meet, to be made With requiring, using high level heat resisting steel, cost is then multiplied.Therefore the nozzle segment of current heat-accumulating burner mostly uses resistance to Fiery material moulding by casting, makes steel construction be not directly contacted with flame, eliminates the use of heat resisting steel, greatly reduces the manufacture of burner Cost.See 2011202342217 heat-accumulating burner of the applicant's patent.As the key position of burner, the use of the resistance to material of burner Service life directly determines the service life of heat-accumulating burner.
General steel mill's steel roasting process requirement, according to it is new build packet, overhaul, in repair, light maintenance difference, according to different bakings Curve is baked to 950 DEG C or more from room temperature.Because of baking temperature height, (the combustion chamber Contact Temperature of resistance to material reaches heat-accumulating burner 1500℃)；Air-flow is relatively strong (high combustion rate burner spout reaches 50~70m/s), washes away serious；Especially hot and cold alternation is frequent, accumulation of heat Burn commutating frequency 15~30 seconds, and low-temperature bake section is from 100 DEG C~1100 DEG C alternatings, and high-temperature baking section is from 1100 DEG C~1500 DEG C alternating.So very high to the performance requirement of the resistance to material of burner, it is easy to appear crackle, monoblock are de- for the resistance to material of heat-accumulating burner at present Phenomena such as falling, falling off successively after the spot of surface, causes burner to scrap.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of for ladle baking burner Castable refractory and ladle baking burner, for solving in the prior art since the castable refractory for ladle baking burner is resistance to Ladle baking burner is susceptible to crackle, monoblock falls off caused by pressure and thermal shock resistance are poor, surface takes off successively after playing spot It falls etc. and to show, the problem of to cause burner to scrap.
In order to achieve the above objects and other related objects, the present invention provides a kind of refractory casting for ladle baking burner Material, the castable refractory by mass percentage, including following components：50%~85% bauxite chamotte, 2%~ 10% pure calcium aluminate cement, 10%~25% alumina powder, 2%~10% ultrafine silica powder and 1%~5% not Become rusty steel steel fibre.
As the present invention castable refractory a kind of preferred embodiment, the bauxite chamotte by mass percentage, Including following components：88%~90% Al2O3, 2%~3% Fe2O3And 8%~9% SiO2。
The refractoriness of a kind of preferred embodiment of castable refractory as the present invention, the bauxite chamotte is more than 1750 ℃。
As the present invention castable refractory a kind of preferred embodiment, the pure calcium aluminate cement by mass percentage, Including following components：65%~75% CaO and 25%~35% Al2O3。
The purity of a kind of preferred embodiment of castable refractory as the present invention, the alumina powder is more than or equal to 99%, The grain size of the alumina powder is less than or equal to 3 μm.
The purity of a kind of preferred embodiment of castable refractory as the present invention, the silica powder is more than or equal to 93%, The grain size of the silica powder is less than 1 μm.
The bulk density of a kind of preferred embodiment of castable refractory as the present invention, the castable refractory is 2.8 g/ cm3~2.9g/cm3, the porosity be less than 18%, refractoriness be more than 1650 DEG C, thermal shock be heated end face breakage rate P=(50 ± 5) % when Number is 100 times.
The present invention also provides a kind of ladle baking burner, the ladle baking burner is by resistance to described in any of the above-described scheme Fiery castable is poured into a mould.
As described above, the castable refractory and ladle baking burner for ladle baking burner of the present invention, the fire resisting Castable by mass percentage, including following components：50%~85% bauxite chamotte, 2%~10% fine aluminium acid Calcium cement, 10%~25% alumina powder, 2%~10% ultrafine silica powder and 1%~5% stainless steel steel fibre； The castable refractory is high with bulk density, the porosity is low, refractoriness is high, high-temperature-resistant gas washes away, pressure-resistant wear-resisting property is good And thermal shock performance it is good the advantages that；Good using the ladle baking burner performance of the castable refractory, the service life is longer, Be not in that crackle, monoblock fall off and phenomena such as falling off successively after spot is played on surface during use, reduce burner spare part more Frequency is changed, extends the time between overhauls(TBO), has saved cost.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from Various modifications or alterations are carried out under the spirit of the present invention.
Embodiment one
The present embodiment provides a kind of castable refractory for ladle baking burner, the castable refractory presses quality percentage Than meter, including following components：50%~85% bauxite chamotte, 2%~10% pure calcium aluminate cement, 10%~25% Alumina powder, 2%~10% ultrafine silica powder and 1%~5% stainless steel steel fibre.
As an example, in the castable refractory, the mass percent of the bauxite chamotte can be 50%, 55%, 60%, 65%, 70%, 75%, 80% or 85%；The mass percent of the pure calcium aluminate cement can be 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% or 10%；The mass percent of the alumina powder can be 10%, 15%, 20% or 25%；The mass percent of the ultrafine silica powder can be 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% or 10%；The mass percent of the stainless steel steel fibre can be：1%, 2%, 3%, 4% or 5%.The castable refractory In, under the premise of it is 100% to meet the sum of mass percent of each component, the castable refractory can be any of the above-described matter Measure the alumine of percentage, the pure calcium aluminate cement, the alumina powder, the ultrafine silica powder and it is described not The combination of rust steel steel fibre.
As an example, the bauxite chamotte is by mass percentage, including following components：88%~90% Al2O3, 2%~3% Fe2O3And 8%~9% SiO2。
As an example, in the bauxite chamotte, Al2O3Mass percent can be 88%, 89% or 90%； Fe2O3Mass percent can be 2%, 2.5% or 3%；SiO2Mass percent can be 8%, 8.5% or 9%.
As an example, the refractoriness of the bauxite chamotte is more than 1750 DEG C.
As an example, the pure calcium aluminate cement is by mass percentage, including following components：65%~75% CaO And 25%~35% Al2O3。
As an example, in the pure calcium aluminate cement, the mass percent of CaO can be 65%, 70% or 75%；Al2O3 Mass percent can be 25%, 30% or 35%.
As an example, the purity of the alumina powder is more than or equal to 99%, the grain size of the alumina powder is less than or equal to 3 μ m；Preferably, in the present embodiment, the purity of the alumina powder is more than or equal to 99.9%, and the grain size of the alumina powder is less than 1 μ m。
As an example, the purity of the silica powder is more than or equal to 93%, the grain size of the silica powder is less than 1 μm；It is excellent Selection of land, in the present embodiment, the purity of the alumina powder is more than or equal to 99%.
As an example, the bulk density of the castable refractory is 2.8g/cm3~2.9g/cm3, the porosity be less than 18%, Refractoriness be more than 1650 DEG C, thermal shock be heated end face breakage rate P=(50 ± 5) % when number be 100 times.
The castable refractory in the present embodiment is high with bulk density with the castable refractory, the porosity is low, The advantages that refractoriness is high, high-temperature-resistant gas washes away, pressure-resistant wear-resisting property is good and thermal shock performance is good.
Embodiment two
The present embodiment provides a kind of ladle baking burner, the ladle baking burner is poured by the fire resisting described in embodiment one Material feeding is poured into a mould.The concrete component feature detailed in Example one of the castable refractory, is not repeated herein.In the present embodiment The ladle baking burner performance it is good, the service life is longer, is not in crackle in use, monoblock falls off and surface Phenomena such as then spot falls off successively is played, the replacement frequency of burner spare part is reduced, extends the time between overhauls(TBO), has saved cost.As above Described, the of the invention castable refractory and ladle baking burner for ladle baking burner, the castable refractory press quality Percentages, including following components：50%~85% bauxite chamotte, 2%~10% pure calcium aluminate cement, 10%~ 25% alumina powder, 2%~10% ultrafine silica powder and 1%~5% stainless steel steel fibre.The castable refractory With bulk density is high, the porosity is low, refractoriness is high, high-temperature-resistant gas washes away, pressure-resistant wear-resisting property is good and thermal shock performance is good etc. Advantage；Good using the ladle baking burner performance of the castable refractory, the service life is longer, in use will not Phenomena such as cracked, monoblock falls off and surface plays spot and then falls off successively, reduces the replacement frequency of burner spare part, extends inspection The period is repaiied, cost has been saved.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as At all equivalent modifications or change, should by the present invention claim be covered.

Claims (8)

1. a kind of castable refractory for ladle baking burner, which is characterized in that the castable refractory is by mass percentage Meter, including following components：50%~85% bauxite chamotte, 2%~10% pure calcium aluminate cement, 10%~25% Alumina powder, 2%~10% ultrafine silica powder and 1%~5% stainless steel steel fibre.
2. castable refractory according to claim 1, it is characterised in that：The bauxite chamotte is by mass percentage Meter, including following components：88%~90% Al2O3, 2%~3% Fe2O3And 8%~9% SiO2。
3. castable refractory according to claim 2, it is characterised in that：The refractoriness of the bauxite chamotte is more than 1750℃。
4. castable refractory according to claim 1, it is characterised in that：The pure calcium aluminate cement is by mass percentage Meter, including following components：65%~75% CaO and 25%~35% Al2O3。
5. castable refractory according to claim 1, it is characterised in that：The purity of the alumina powder is more than or equal to 99%, the grain size of the alumina powder is less than or equal to 3 μm.
6. castable refractory according to claim 1, it is characterised in that：The purity of the silica powder is more than or equal to 93%, the grain size of the silica powder is less than 1 μm.
7. castable refractory according to claim 1, it is characterised in that：The bulk density of the castable refractory is 2.8g/cm3~2.9g/cm3, the porosity be less than 18%, refractoriness be more than 1650 DEG C, thermal shock be heated end face breakage rate P=(50 ± 5) number is 100 times when %.
8. a kind of ladle baking burner, which is characterized in that the ladle baking burner is by any one of such as claim 1 to 7 institute The castable refractory stated is poured into a mould.
CN201710121285.8A 2017-03-02 2017-03-02 Castable refractory and ladle baking burner for ladle baking burner Pending CN108530040A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN201710121285.8A CN108530040A (en) 2017-03-02 2017-03-02 Castable refractory and ladle baking burner for ladle baking burner

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110963809A (en) * 2019-12-16 2020-04-07 江苏诺明高温材料股份有限公司 Preparation method of Al4Si4C-Al2O3 refractory castable

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005194119A (en) * 2004-01-05 2005-07-21 Taiko Rozai Kk Method of wet-spraying premix material
CN101492300A (en) * 2009-01-15 2009-07-29 范圣良 Superpower wear-resistant pouring material
CN103288460A (en) * 2012-02-27 2013-09-11 上海宝钢工业技术服务有限公司 Casting material for prefabricating burner block of annular heating furnace
CN104326758A (en) * 2014-10-21 2015-02-04 郑州安耐克实业有限公司 High-temperature resistant thermal shock resistant pipeline used in iron-making hot blast heater and preparation method of high-temperature resistant thermal shock resistant pipeline
CN104418598A (en) * 2013-08-29 2015-03-18 章成荣 Refractory castable for steel ladle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005194119A (en) * 2004-01-05 2005-07-21 Taiko Rozai Kk Method of wet-spraying premix material
CN101492300A (en) * 2009-01-15 2009-07-29 范圣良 Superpower wear-resistant pouring material
CN103288460A (en) * 2012-02-27 2013-09-11 上海宝钢工业技术服务有限公司 Casting material for prefabricating burner block of annular heating furnace
CN104418598A (en) * 2013-08-29 2015-03-18 章成荣 Refractory castable for steel ladle
CN104326758A (en) * 2014-10-21 2015-02-04 郑州安耐克实业有限公司 High-temperature resistant thermal shock resistant pipeline used in iron-making hot blast heater and preparation method of high-temperature resistant thermal shock resistant pipeline

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110963809A (en) * 2019-12-16 2020-04-07 江苏诺明高温材料股份有限公司 Preparation method of Al4Si4C-Al2O3 refractory castable
CN110963809B (en) * 2019-12-16 2022-05-17 江苏诺明高温材料股份有限公司 Preparation method of Al4Si4C-Al2O3 refractory castable

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Application publication date: 20180914