CN1086504A - Sealing material for continuous casting gate and manufacturing process thereof - Google Patents

Sealing material for continuous casting gate and manufacturing process thereof Download PDF

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Publication number
CN1086504A
CN1086504A CN 92111973 CN92111973A CN1086504A CN 1086504 A CN1086504 A CN 1086504A CN 92111973 CN92111973 CN 92111973 CN 92111973 A CN92111973 A CN 92111973A CN 1086504 A CN1086504 A CN 1086504A
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China
Prior art keywords
weight percent
sealing material
sealing
continuous casting
mouth
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CN 92111973
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Chinese (zh)
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CN1042024C (en
Inventor
文光华
任常富
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Chongqing University
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Chongqing University
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Priority to CN92111973A priority Critical patent/CN1042024C/en
Publication of CN1086504A publication Critical patent/CN1086504A/en
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Publication of CN1042024C publication Critical patent/CN1042024C/en
Anticipated expiration legal-status Critical
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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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
    • C04B28/342—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders the phosphate binder being present in the starting composition as a mixture of free acid and one or more reactive oxides
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

The invention belongs to continuous casting steel flowing water mouth protection cast seam sealing material and manufacturing process thereof.The sealing material through raw-material oven dry, is controlled its moisture by glass powder, perlite, titanium dioxide, lapis amiridis, borax, industrial soda, in proportion batching, broken, grind to form granularity, add caking agent and stir and form.Adopt the method for extruding, will seal material and be sprayed at around the seam of the mouth of a river, along with the carrying out of cast, mouth of a river temperature raises gradually, and sealing material expanded by heating, vitreous occupy seam gaps to partial melting, stop air to suck, and realize the protection of steel stream in the mouth of a river.Simultaneously, the also suitable temperature of the present invention is the sealing of 650～950 ℃ of other seams.

Description

Sealing material for continuous casting gate and manufacturing process thereof
The invention belongs to continuous casting steel flowing water mouth protection cast seam expects and manufacturing process with sealing.
In the continuous casting steel machine process, wrap greatly to the stream of the steel between tundish and crystallizer employing protection placing, can reduce the molten steel secondary oxidation, promote the continuous casting process direct motion, reach the effect that improves slab quality.For this reason, now extensively adopt big bag long nozzle and crystallizer to stretch into formula mouth of a river protection steel stream.Like this, the protection of the mouth of a river and long nozzle and crystallizer sectional type mouth of a river seam crossing just becomes the key that influences steel stream protection effect under big the bag.Up to now, generally use argon protection method, but have the following shortcoming: logical argon gas inconvenient operation is difficult for the processing accident; Ventilating pit stops up easily, is difficult to the company of realization and waters; The part argon gas flows to into middle narrow-necked earthen jar with steel, causes near exposed the reoxidizing of the steel stream of long nozzle; The argon gas come-up stirs near the long nozzle, is difficult to judge whether big Baogang water has watered, and causes slag to enter middle narrow-necked earthen jar easily; Argon gas and connection for breather pipe consumption, cost is higher.These factors directly affect the real realization of protection cast.
In order to overcome the deficiencies in the prior art, the present invention has developed sealing material for continuous casting gate and manufacturing process thereof.Solve mouth of a river seam and suck air problem, reach protection steel stream and avoid secondary oxidation, promote the continuous casting process direct motion.
The objective of the invention is to realize, comprise the production technique of Sealing Material and this product by following technical solution.
Development requires to sealing material:
In mouth of a river seam crossing working temperature is 650～950 ℃, sealing material rapid expansion, and surface compact and not breaking.
In the casting process, the sealing material is in the soft state that melts, and viscosity is big, does not flow, and pours the mouth of a river, back and is easy to separate, and is convenient to change the mouth of a river and connects and water.
Select for use binding agent to ooze and close with the sealing material, non-volatile under the normal temperature, be convenient to spraying.
The starting material wide material sources, pollution-free to environment and molten steel.
In order to satisfy above-mentioned requirements, select for use following material to make sealing material raw material:
Glass powder: major ingredient SiO 2And Na 2O makes sealing material base-material, has lower fusing point and bigger viscosity.
Perlite: major ingredient SiO 2, Al 2O 3High-temperature heating expands, the slag strongly-acid, and viscosity is big.
Titanium dioxide: major ingredient TiO 2It is fine and close that effect is expanded the sealing material, strengthens anti-gettering ability.
Lapis amiridis: major ingredient Al 2O 3The soft temperature range of melting of broadening sealing material.
Industrial soda: major ingredient Na 2CO 3High-temperature heating resolves into Na 2O adjusts sealing material fusing point, plays fluxing action.
Borax: major ingredient B 2O 3, Na 2O.Adjust sealing material fusing point, play fluxing action.
Binding agent: the mixture of phosphoric acid or industry glycerol or phosphoric acid and industry glycerol.Make powdery sealing material furnishing lute, be convenient to spraying.
According to above-mentioned development principle, sealing material finished product chemical constitution and weight percent are:
SiO 2：40～70%;Al 2O 3：5～10%;TiO 2：8～15%
B 2O 3：5～15%;Na 2O：8～28%。
Reach above-mentioned chemical constitution and weight percent, its starting material are formed and weight percent is:
Glass powder: 30～50%; Perlite: 10～40%;
Titanium dioxide: 8～15%; Lapis amiridis: 2～10%;
Borax: 7～15%; Industrial soda: 2～30%.
Binding agent add-on (weight percent) is:
Phosphoric acid: 25～30%;
Or industry glycerol: 30～35%;
Or phosphoric acid and industry glycerol mixing additional proportion: 1: 3;
Add-on: 27～33%;
The manufacturing process of sealing material: the starting material oven dry, control its moisture content; Prepare burden in proportion, fragmentation, fine grinding becomes powder; Add binding agent, mix into the lute shape, in the packing of packing into jar, product.
The fritting in 900～950 ℃ of used borax, to remove the crystal water in the borax, rate of heating is determined by throughput, melted in 5-7 minute clearly to guarantee the crystal water removal to 900～950 ℃ of insulations, all the other starting material toasted in 100～140 ℃ 2.8～3.5 hours, made these starting material moisture content be controlled at 0.1～0.5%.To dry starting material and carry out weighing by the sealing material formula.The batching back is broken, fine grinding becomes powder, and granularity is controlled at 200～300 orders.Add binding agent in mixed powder, the furnishing toothpaste-like is contained in the packing jar, product.
Utilize the said products, just can realize the protection cast of the mouth of a river steel stream.In the molten steel casting process, mouth of a river temperature raises gradually, and the sealing material that extruding is sprayed at seam crossing expands, partial melting, and filling stops seam to suck air in seam, plays the effect of seal protection steel stream, has remedied the shortcoming of argon shield; The sealing material is easy to separate with the mouth of a river in mouth of a river seam fusion, changes the mouth of a river and realizes even watering, and is simple to operate, with low cost, solid.
Embodiment 1
Sealing material finished product composition and weight percent are:
SiO 2Al 2O 3TiO 2Na 2O B 2O 3
42.9%, 7.4%, 13.5%, 27.3%, 8.9%;
Its raw material weight per-cent consists of:
Glass powder perlite lapis amiridis titanium dioxide industry soda borax phosphoric acid
32.4%, 10%, 5%, 10.8%, 29%, 12.8%, 27%
763 ℃ of the sealing material temperature of fusion of preparation.Utilize the method for spray gun extruding, the sealing material is applied to the big bag long nozzle of continuous casting seam crossing by water cooled double-layered conduit rifle, the protection steel 17 minutes time of stream, during sealing material expansion, densification and fusion.Negative pressure 380mmH in the test long nozzle 2O does not protect negative pressure 15mmH in the mouth of a river 2O illustrates that vacuum tightness increases in the mouth of a river, and inspiratory capacity reduces greatly, significant sealing affection.Watered the mouth of a river, back and be easy to separate, it is even to observe the fusion of sealing material.
Embodiment 2
The chemical constitution and the weight percent of sealing material finished product are:
SiO 2Al 2O 3TiO 2Na 2O B 2O 3
48.0%, 9.0%, 13.4%, 18.6%, 11.0%;
Its raw material weight per-cent consists of:
Glass powder perlite lapis amiridis titanium dioxide industry soda Borate industry glycerine
40%, 15%, 6%, 12%, 12%, 15%, 32%
822 ℃ of the sealing material temperature of fusion of preparation utilize spray gun to be used for wrapping greatly the long nozzle seam crossing, the protection steel 22 minutes time of stream, during the sealing material expand densification and vitreous.Test protects effect identical with embodiment 1 with observing.
Embodiment 3
The chemical constitution and the weight percent of sealing material finished product are:
SiO 2Al 2O 3TiO 2Na 2O B 2O 3
67.0%, 4.5%, 13.5%, 9.0%, 6.0%;
Its raw material weight per-cent consists of:
Glass powder perlite lapis amiridis titanium dioxide industry soda Borate industry glycerine
40%, 33%, 3%, 11%, 5%, 8%, 34%
Prepare sealing material temperature of fusion be 947 ℃, with spray gun its sealing material is applied to crystallizer sectional type mouth of a river seam crossing, guard time 40 minutes.The sealing material expands during this time, densification, vitreous and partial melting.The crystallizer molten steel surface calmness, obviously being different from has gas to suck the mold liquid level that seethes.Seam expects with sealing and need not compare that crystallizer is got the steel sample analysis oxygen content in steel and descended 30%.Changing down in the casting process, the mouth of a river conveniently is easy to the company of realization and waters.

Claims (5)

1, a kind of sealing material for continuous casting gate is characterized in that it is formed and weight percent is:
The starting material of sealing material are formed and weight percent is:
Glass powder: 30-50%,
Perlite: 10-40%,
Titanium dioxide: 8-15%,
Lapis amiridis: 2-10%,
Borax: 7-15%,
Industrial soda: 2-30%,
Phosphoric acid: 25-30%,
Or industry glycerol: 30-35%,
Or phosphoric acid mixes add-on with industry glycerol: 27-33%,
Wherein: phosphoric acid: industry glycerol=1: 3;
And make the chemical constitution of sealing finished material and weight percent be:
SiO 2： 40-70%，
Al 2O 3： 5-10%，
TiO 2： 8-15%，
B 2O 3： 5-15%，
Na 2O： 8-28%。
2, sealing material for continuous casting gate according to claim 1 is characterized in that composition and weight percent that it is concrete are:
Its starting material are formed and weight percent is:
Glass powder: 32.4%, borax: 12.8%,
Perlite: 10%, industrial soda: 29%,
Lapis amiridis: 5%, phosphoric acid: 27%,
Titanium dioxide: 10.8%,
And make the chemical constitution of sealing finished material and weight percent be:
SiO 2：42.9%， Na 2O：27.3%，
Al 2O 3：7.4%， B 2O 3：8.9%，
TiO 2：13.5%。
3, sealing material for continuous casting gate according to claim 1 is characterized in that composition and weight percent that it is concrete are:
Its starting material are formed and weight percent is:
Glass powder: 40%, borax: 15%,
Perlite: 15%, industrial soda: 12%,
Lapis amiridis: 6%, industry glycerol: 32%,
Titanium dioxide: 12%,
And make the chemical constitution of sealing finished material and weight percent be:
SiO 2：48%， Na 2O：18.6%，
Al 2O 3：9.0%， B 2O 3：11.0%，
TiO 2：13.4%。
4, sealing material for continuous casting gate according to claim 1 is characterized in that composition and weight percent that it is concrete are:
Its starting material are formed and weight percent is:
Glass powder: 40%, borax: 8%,
Perlite: 33%, industrial soda: 5%,
Lapis amiridis: 3%, industry glycerol: 34%,
Titanium dioxide: 11%,
And make the chemical constitution of sealing finished material and weight percent be:
SiO 2：67.0%， Na 2O：9%，
Al 2O 3：4.5%; B 2O 3：6.0%，
TiO 2：13.5%。
5, the manufacturing process of enforcement claim 1 or 2 or 3 or 4 described sealing material for continuous casting gate comprises the starting material oven dry, controls its moisture content, prepares burden in proportion, and broken, fine grinding becomes powder, adds caking agent, mixes, and the packing of packing into jar is characterized in that:
(1) make borax fritting in 900-950 ℃, and be incubated 5～7 minutes, all the other starting material toasted in 100-140 ℃ 2.8～3.5 hours, made these starting material moisture content be controlled at 0.1～0.5%;
(2) thin ground granularity is the 200-300 order.
CN92111973A 1992-11-02 1992-11-02 Sealing material for continuous casting gate and its manufacturing method Expired - Fee Related CN1042024C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN92111973A CN1042024C (en) 1992-11-02 1992-11-02 Sealing material for continuous casting gate and its manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN92111973A CN1042024C (en) 1992-11-02 1992-11-02 Sealing material for continuous casting gate and its manufacturing method

Publications (2)

Publication Number Publication Date
CN1086504A true CN1086504A (en) 1994-05-11
CN1042024C CN1042024C (en) 1999-02-10

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Application Number Title Priority Date Filing Date
CN92111973A Expired - Fee Related CN1042024C (en) 1992-11-02 1992-11-02 Sealing material for continuous casting gate and its manufacturing method

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1093016C (en) * 2000-03-29 2002-10-23 上海交通大学 Sealing material and method for low-pressure casting crucible
CN101576161A (en) * 2009-06-19 2009-11-11 武汉钢铁(集团)公司 Steel ladle long nozzle sealing ring
CN108672693A (en) * 2018-07-24 2018-10-19 鞍山市和丰耐火材料有限公司 A kind of sealing structure and method using the submersed nozzle containing expanded graphite meterial
CN112805101A (en) * 2018-10-05 2021-05-14 黑崎播磨株式会社 Shaped joint material for heat setting
CN112876264A (en) * 2021-01-13 2021-06-01 广东韶钢松山股份有限公司 Application method of continuous casting machine immersion type water gap sealing material
CN114682768A (en) * 2022-04-07 2022-07-01 青岛正望新材料股份有限公司 Vacuum pouring method for large casting

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1008889B (en) * 1987-10-28 1990-07-25 唐国进 High strength thermal-insulating jacket for casting head
CN1040527A (en) * 1988-08-23 1990-03-21 孙孟全 Composite heat-insulating and heating cover of casting head

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1093016C (en) * 2000-03-29 2002-10-23 上海交通大学 Sealing material and method for low-pressure casting crucible
CN101576161A (en) * 2009-06-19 2009-11-11 武汉钢铁(集团)公司 Steel ladle long nozzle sealing ring
CN108672693A (en) * 2018-07-24 2018-10-19 鞍山市和丰耐火材料有限公司 A kind of sealing structure and method using the submersed nozzle containing expanded graphite meterial
CN108672693B (en) * 2018-07-24 2024-02-13 鞍山市和丰耐火材料有限公司 Sealing structure and method for submerged nozzle with expanded graphite material
CN112805101A (en) * 2018-10-05 2021-05-14 黑崎播磨株式会社 Shaped joint material for heat setting
CN112805101B (en) * 2018-10-05 2022-09-20 黑崎播磨株式会社 Shaped joint material for heat setting
CN112876264A (en) * 2021-01-13 2021-06-01 广东韶钢松山股份有限公司 Application method of continuous casting machine immersion type water gap sealing material
CN114682768A (en) * 2022-04-07 2022-07-01 青岛正望新材料股份有限公司 Vacuum pouring method for large casting

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