WO2009128282A1 - Buse d’immersion pour coulée continue - Google Patents

Buse d’immersion pour coulée continue Download PDF

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Publication number
WO2009128282A1
WO2009128282A1 PCT/JP2009/050723 JP2009050723W WO2009128282A1 WO 2009128282 A1 WO2009128282 A1 WO 2009128282A1 JP 2009050723 W JP2009050723 W JP 2009050723W WO 2009128282 A1 WO2009128282 A1 WO 2009128282A1
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WO
WIPO (PCT)
Prior art keywords
metal case
immersion nozzle
refractory
continuous casting
inner metal
Prior art date
Application number
PCT/JP2009/050723
Other languages
English (en)
Japanese (ja)
Inventor
真 中村
秀隆 荻野
仁 国井
昌徳 小形
隆行 松長
Original Assignee
品川白煉瓦株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 品川白煉瓦株式会社 filed Critical 品川白煉瓦株式会社
Priority to BRPI0909774A priority Critical patent/BRPI0909774A2/pt
Priority to CN200980113585.5A priority patent/CN102006949B/zh
Publication of WO2009128282A1 publication Critical patent/WO2009128282A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

Definitions

  • the present invention relates to an immersion nozzle for continuous casting, and in particular, a metal case provided on a cylindrical refractory is doubled in the outer and inner sides to prevent breakage of the neck of the cylindrical refractory due to pressing force and stress. Related to the improvement.
  • molten metal is injected from a container such as a tundish through a flow control device using a slide gate plate, a stopper, etc. into a casting mold and solidified into a fixed shape.
  • a slide gate device it is installed at the bottom of the tundish and used in combination of an upper nozzle, two to three slide plates, a lower nozzle, and an immersion nozzle.
  • the molten metal is poured into the casting mold from inside the tundish through the upper nozzle, the slide plate, the lower nozzle, and the immersion nozzle.
  • FIGS. 1 and 5 of Patent Document 1 describe a continuous casting refractory block having a configuration in which the outer peripheral surface of the integrated assembly of plate brick and immersion nozzle is directly accommodated in an integral metal case.
  • FIGS. 3 and 4 of Patent Document 1 describe a refractory block for continuous casting, which is manufactured as an integrated refractory from the plate to the immersion nozzle and directly accommodated in a one-piece metal case.
  • the immersion nozzle integrated from the lower plate to the immersion nozzle from the viewpoint of operability.
  • integrated immersion nozzle is widely used. That is, as shown in FIG. 10, the outer surface including the outer periphery of the elongated cylindrical refractory 1 is covered with the first metal case 2 and the second metal case 3, and each metal case 2, 3 is The joint 4 is integrally formed by welding.
  • the conventional continuous casting immersion nozzle is configured as described above, the following problems exist.
  • the joint of the refractory can be eliminated from the lower plate to the mold, the total length of the refractory must be long.
  • the immersion nozzle may be physically damaged due to vibrations from the molten steel flowing in the casting mold and an impact applied when replacing the immersion nozzle.
  • the stress (hereinafter referred to as dynamic stress) due to the push-up force 5 temporarily generated by such vibration or impact is particularly concentrated on the nozzle neck, and the magnitude of the stress is large in proportion to the lengthening of the immersion nozzle Become.
  • the immersion nozzle neck In order to protect the immersion nozzle neck from vibration and impact applied during this use, it is effective to reinforce the portion from the flange portion 1a of the immersion nozzle to the main body with a metal case as shown in FIG. That is, in the integrated immersion nozzle, it is effective to reinforce its neck portion with a metal case, even if it has a jointless structure manufactured from an integrated refractory from the plate to the immersion nozzle.
  • flange 1a the shape of the metal case often has to be deep, and often a long metal case can not be manufactured.
  • different metal cases are manufactured for the flange portion and the main body portion, and both are connected by welding.
  • FIG. 2 of Patent Document 1 an immersion nozzle housed in a cylindrical metal case and a plate brick housed in another metal case are joined via mortar, and the metal cases are integrally welded.
  • the second method described above is also an effective countermeasure, there is a limit to the pressing pressure that can be applied to the refractory from the viewpoint of the capacity of the apparatus and the strength of the refractory, and the refractory such as plate and immersion nozzle Because the molten steel flow passes through the inside during casting, the temperature rises from the inside and expands. For this reason, the refractories are in a state of being stuck on the inner hole side through which the molten steel flow passes, and a gap is generated in the peripheral portion. In this state, as shown in FIG.
  • the outside of the immersion nozzle is pressed from the bottom to the top by the lifting force 5, and the larger the pressing pressure, the stress generated at the neck of the refractory (hereinafter referred to as static stress and ) Will grow.
  • static stress and a pressure device for the immersion nozzle is provided separately from the pressure device for pressing the plate.
  • the pressing pressure (about 8000 to 10000 MPa) is set within the range that the immersion nozzle material can withstand.
  • the neck portion of the immersion nozzle may be cracked and broken without being able to withstand an excessive load.
  • the neck portion of the immersion nozzle is reinforced with a metal case to take measures to secure rigidity.
  • the present situation is not enough.
  • the immersion nozzle for continuous casting injects molten metal from a container into a casting mold and is an immersion nozzle for continuous casting comprising a cylindrical refractory, wherein the metal taper corresponds to the tapered portion of the cylindrical refractory. And an outer metal case provided on the outer side of the inner metal case, and an outer metal case provided on the outer surface of the inner case. At least a part of the inner metal case is joined, and the outer metal case has an L-shaped cross section consisting of a vertical plate portion and a horizontal plate portion, and the outer side of the horizontal plate portion is from below.
  • the inclination angle of the metal tapered portion of the inner metal case corresponding to the tapered portion of the cylindrical refractory is a configuration that receives a pressing force, and the inclination angle of the metal tapered portion of the inner metal case is in the vertical direction when the cylindrical refractory is used. 20.about.60.
  • a refractory material for a metal case is filled between the inner metal case and the outer metal case, and
  • the refractory material of the tubular refractory is made of alumina carbon or alumina silica carbon, and the refractory material of the tubular refractory is formed of two layers of upper and lower layers different in material from each other, and the refractory material of the upper layer
  • the thermal expansion coefficient of the material is larger than the thermal expansion coefficient of the material of the lower layer refractory material, and the difference between the thermal expansion coefficients of the upper layer and the lower layer refractory material is 15% or more.
  • the inner metal case is formed in a round cylinder
  • the outer metal case is formed in a square tube
  • the inner metal case and the outer metal case are formed in a square tube.
  • the immersion nozzle for continuous casting which injects the molten metal from the container into the casting mold and is made of a cylindrical refractory, the metal corresponding to the tapered portion of the cylindrical refractory and formed in the inner metal case
  • the outer metal case has an L-shaped cross section consisting of a vertical plate portion and a horizontal plate portion, and the horizontal plate portion receives a pressing force from the outside lower side.
  • An outer metal case that can withstand dynamic stress can be obtained.
  • the inclination angle of the metal tapered portion of the inner metal case corresponding to the tapered portion of the cylindrical refractory corresponds to the vertical direction at the time of using the cylindrical refractory.
  • the refractory material for the metal case is filled between the inner metal case and the outer metal case, the rigidity can be further improved.
  • the refractory material of the cylindrical refractory is made of alumina carbon or alumina silica carbon, and the refractory materials of the cylindrical refractory have upper and lower layers of different materials.
  • the inner metal case is formed in a round cylinder, and the outer metal case is formed in a square cylinder, so that a refractory material can be filled therebetween.
  • the metal case and the outer metal case have a square cylindrical shape, the metal case has a double structure in which the metal cases are mutually polymerized, and the rigidity is improved.
  • a metal case structure of a two-layer structure ranging from the flange portion of the immersion nozzle to the main body portion, it is composed of an outer metal case for attachment to the flow control device and an inner metal case supporting a refractory.
  • a high strength steel material can be made in one piece by forming the inner metal case in direct contact with the refractory material into a cylindrical (elliptical) shape and a shallow shape of a diaphragm that is not bent at a right angle.
  • (2) can ensure sufficient thickness and sufficient length, so it is highly resistant to dynamic stress generated by vibration and impact.
  • the tapered or funnel-like portion of the inner metal case is generated at the inflection point of the immersion nozzle neck, as the direction of the force pressing the immersion nozzle from below is transmitted obliquely to the refractory and transmitted to the refractory It has the effect of suppressing static stress.
  • the two-layer structure in which the inner and outer metal cases are at least partially in contact with each other significantly improves the rigidity of the entire metal case and deforms both the dynamic stress and the static stress. You can prevent.
  • the present invention provides a continuous casting immersion nozzle in which a metal case provided on a cylindrical refractory is doubled in the outer side and an inner side to prevent breakage of the neck portion of the cylindrical refractory due to pressing force or stress. With the goal.
  • FIG. 1 shows a first embodiment of the present invention
  • the one indicated by reference numeral 1 in FIG. 1 is a long cylindrical refractory for constituting a continuous casting immersion nozzle 10 used in a slide valve.
  • a molten steel injection hole 10 a is formed in the axial center position of the cylindrical refractory 1 so as to penetrate therethrough.
  • the outer surface 11 of the cylindrical refractory 1 is composed of a tapered portion 11a at the top and a straight portion 11b formed at the lower portion of the tapered portion 11a.
  • the metal member 12A provided on a part or the whole of the outer surface 11 is composed of an inner metal case 12 and an outer metal case 13.
  • the inner metal case 12 is formed along the tapered portion 11a and the linear portion 11b, and the tapered portion 11a is formed with a metal tapered portion 12a along the shape.
  • the outer metal case 13 having an L-shaped cross section and including a vertical plate portion 13a and a horizontal plate portion 13b is provided at an outer peripheral position of the metal tapered portion 12a, and the tapered portion 11a and the outer metal case 13 are provided.
  • the metal case refractory material 15 is filled in the space 14 having a triangular cross section formed between the two.
  • the outer metal case 13 and the inner metal case 12 are at least partially joined or entirely joined by welding or the like, and the inner metal case 12 and the outer metal case 13 are attached to the cylindrical refractory 1. It may be formed on the entire outer periphery of the tongue, or may be partially formed.
  • FIG. 2 is a second embodiment showing another plan configuration and a sectional view of the continuous casting immersion nozzle 10 of FIG. 1, wherein the outer metal case 13 has a square shape and the inner metal case 12 has a cylindrical shape.
  • the vertical plate portion 13a and the horizontal plate portion 13b are integrally bent.
  • FIG. 3 shows a third embodiment of the present invention, in which a vertical portion 12B is formed on the upper portion of the inner metal case 12, and the vertical portion 12B is joined to the inner surface of the vertical plate portion 13a.
  • FIG. 4 shows a fourth embodiment of the present invention, in which the metal tapered portion 12a is made shorter than that in FIG. 1 on the inner surface of the vertical plate 13a, and they are joined together by welding or the like.
  • FIG. 5 is 5th form of this invention, makes the above-mentioned cylindrical refractory 1 2 layers, and is formed by the upper layer 1A and the lower layer 1B.
  • 6 is a sixth embodiment of the present invention and shows a configuration in which the refractory material 15 for metal case is not filled between the inner metal case 12 and the outer metal case 13 described above.
  • FIGS. 7 and 8 show a seventh embodiment of the present invention, in which both the inner metal case 12 and the outer metal case 13 described above are square-shaped and polymerized with each other.
  • FIG. 9 shows an eighth embodiment of the present invention, in which the cylindrical refractory 1 is made into an upper layer 1A and a lower layer 1B, and in FIG. 9, A is the length of the upper layer 1A and B is the metal tapered portion 12a of the inner metal case 12. A length C, a length of the inner metal case 12, a D indicates an inflection point bent from the flange portion 1a, and a t indicates a thickness of the inner metal case 12.
  • the first embodiment of FIG. 1 of the invention is used in a continuous casting immersion nozzle 10 for injecting molten metal from a container such as tundish into a casting mold, attached to a flow control device located on the tundish side, An inner one-piece cylindrical shape straddling the main body from the flange 1a having the outer metal case 13 fitted to the control device and the press in use and the funnel-like part consisting of the metal taper 12a in whole or in part
  • the continuous casting nozzle is composed of the inner metal case 12 and is accommodated by the two-layer metal case in which at least a part of the two are joined.
  • the thickness of each of the metal cases 12 and 13 is preferably 1.5 mm or more on both the inside and the outside, and more preferably 2.0 mm or more.
  • the length of the inner metal case is preferably 60 mm or more, more preferably 100 mm or more in the vertical direction straddling the upper and lower portions of the bending point D of the neck portion of the immersion nozzle.
  • sufficient effects can not be obtained unless at least a part of the inner and outer metal cases 12 and 13 are directly joined.
  • the angle of the metal tapered portion 12a of the inner metal case 12 is 20 degrees to 60 degrees with respect to the vertical direction E at the time of use in the above two-layered metal cases 12 and 13.
  • a continuous casting nozzle housed by a metal case in the range of The refractory member of the immersion nozzle is supported in the inner metal case 12 by an angled metal taper 12a.
  • the refractory member can not be supported sufficiently.
  • the temperature exceeds 60 degrees the inner metal case 12 is deeply drawn, the thickness of the iron shell becomes uneven, and it becomes difficult to manufacture a sufficiently long one-piece inner metal case 12.
  • the reinforcement of the flange portion 1a is made more efficient in the above-mentioned two-layered metal cases 12 and 13, particularly in the immersion nozzle for quick replacement having a wide flange portion.
  • Between the outer metal case 13 and the inner metal case 12 is filled with the refractory material 15 for the metal case such as castable refractor, or the outer metal case 13 and the inner metal case 12 are made of metal.
  • the outer metal case 13 and the inner metal case 12 can ensure sufficient rigidity against static stress, it is further filled with a refractory material such as castable refractor between the outer iron skin and the inner iron skin.
  • the rigidity can be increased to 3 to 4 times by joining with a metal bridge (not shown).
  • the castable refractor to be used is not in direct contact with the molten steel, so any fixed composition and surface accuracy can be obtained regardless of the chemical composition of the material and the constituent raw material.
  • the coefficient of thermal expansion is too high, cracking may occur due to thermal shock at the start of casting, or the flange portion 1a of the one-piece immersion nozzle may be deformed during casting. Therefore, the coefficient of thermal expansion after drying of the castable refractory is preferably in the range of 0.20 to 0.60% at 1000.degree.
  • alumina-carbon or alumina-silica-carbon materials are used as the material of the immersion nozzle. Depending on the conditions of use, it may be a single material, but may be used in combination of multiple materials.
  • the alumina-carbon or alumina-silica-carbon material of the cylindrical refractory 1 in the metal cases 12 and 13 is different between the upper layer 1A and the lower layer 1B. It is a nozzle for continuous casting which is made of a two-layer material and the thermal expansion coefficient of the material of the upper layer 1A is larger than the thermal expansion coefficient of the material of the lower layer 1B.
  • the immersion nozzle material In order to coat the immersion nozzle material with a metal case, a method of setting using mortar is common.
  • the immersion nozzle material of the uniform material the immersion nozzle material is uniformly restrained by the inner metal case during use, but the thermal expansion coefficient of the upper material is the thermal expansion coefficient of the lower material with two different layers of material
  • the immersion nozzle is constrained to the metal case at the position of the upper material.
  • the upper layer By disposing the upper layer in the range of two thirds or less of the funnel-shaped part at the longest from the joint surface, it is possible to further relieve the stress on the neck part from the immersion nozzle flange part to the main body part.
  • this stress relaxation it is desirable that the difference of the coefficient of thermal expansion of two materials is 15% or more.
  • the chemical composition of a typical immersion nozzle material is often in the range of 35 to 90% by weight of alumina, 0 to 30% by weight of silica, and 10 to 35% by weight of carbon in consideration of corrosion resistance and heat resistance spallability.
  • a method of increasing the ratio of the alumina component in this is generally used, and it can be applied as the material of the upper layer 1A.
  • the thermal expansion coefficient may be increased by adding a metal such as silicon or aluminum, a silicide such as silicon carbide, or a boride such as boron carbide.
  • mixes raw materials, such as an alumina, a silica, carbon, etc.
  • Table 1 shows the quality of the refractory used in the present invention, and shows the coefficient of thermal expansion at 1000 ° C. of each of the materials 1 to 4.
  • the above-mentioned Table 2 is the result of investigating the resistance to an immersion nozzle neck breakage by stress calculation in the present invention using the material of Table 1.
  • the first embodiment is the case where the same material is used from the bonding surface to the main body portion
  • the second to fifth embodiments are cases where a material different from the lower layer 1B is used for the upper layer 1A of the tapered portion 11a.
  • the taper-shaped part 11a said here points out the whole upper part from the inflexion point D from the flange part 1a to a main-body part.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

La présente invention se rapporte à une buse d’immersion pour coulée continue, dans laquelle on peut empêcher l’endommagement de la partie col d’un objet réfractaire cylindrique dû à une force de pression ou à une contrainte par la formation d’un corps métallique prévu pour l’objet réfractaire cylindrique dans une structure double conçue à partir d’une partie extérieure et d’une partie intérieure. La buse d’immersion pour coulée continue comprend un corps métallique intérieur (12) disposé sur une partie ou sur la totalité de la surface extérieure de l’objet réfractaire cylindrique (1), une partie métallique conique (12a) formée sur le corps métallique intérieur (12) de manière à correspondre à la partie conique (11a) de l’objet réfractaire cylindrique (1), et un corps métallique extérieur (13) disposé à l’extérieur du corps métallique intérieur (12). Au moins les parties des corps métalliques (12, 13) sont reliées entre elles.
PCT/JP2009/050723 2008-04-16 2009-01-20 Buse d’immersion pour coulée continue WO2009128282A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BRPI0909774A BRPI0909774A2 (pt) 2008-04-16 2009-01-20 válvula de imersão para lingotamento contínuo.
CN200980113585.5A CN102006949B (zh) 2008-04-16 2009-01-20 连续铸造用浸入式水口

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008106604A JP5001213B2 (ja) 2008-04-16 2008-04-16 連続鋳造用浸漬ノズル
JP2008-106604 2008-04-16

Publications (1)

Publication Number Publication Date
WO2009128282A1 true WO2009128282A1 (fr) 2009-10-22

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PCT/JP2009/050723 WO2009128282A1 (fr) 2008-04-16 2009-01-20 Buse d’immersion pour coulée continue

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JP (1) JP5001213B2 (fr)
CN (1) CN102006949B (fr)
BR (1) BRPI0909774A2 (fr)
WO (1) WO2009128282A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101927340A (zh) * 2010-05-17 2010-12-29 王世泰 连铸用铝(锆)炭质长水口、浸入式水口及整体塞棒耐火制品
JP7461442B1 (ja) 2022-11-14 2024-04-03 黒崎播磨株式会社 連続鋳造用ノズル

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5462640B2 (ja) * 2010-01-15 2014-04-02 東京窯業株式会社 溶湯通過ノズルおよびその製造方法
JP5116852B2 (ja) * 2010-03-30 2013-01-09 明智セラミックス株式会社 鋳造ノズル
EP2444177A1 (fr) * 2010-10-20 2012-04-25 Vesuvius Group S.A Tube pour l'écoulement de métal liquide
JP5713065B2 (ja) * 2013-08-02 2015-05-07 品川リフラクトリーズ株式会社 スラブ連続鋳造用装置
JP6122393B2 (ja) * 2014-02-25 2017-04-26 黒崎播磨株式会社 浸漬ノズル
CN113857470B (zh) * 2021-09-15 2022-12-16 昆明理工大学 一种冶金容器用水口保护装置

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH10258354A (ja) * 1997-03-14 1998-09-29 Shinagawa Refract Co Ltd 溶融金属注入用ノズル
JP2000343208A (ja) * 1999-06-02 2000-12-12 Kurosaki Harima Corp 摺動型浸漬ノズル
JP2002011566A (ja) * 2000-06-29 2002-01-15 Kawasaki Refract Co Ltd 溶融金属注入用ノズル

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2162319Y (zh) * 1993-06-23 1994-04-20 沁阳市耐火材料厂 石英铝碳复合水口
JP4099257B2 (ja) * 1998-02-18 2008-06-11 黒崎播磨株式会社 溶融金属排出用下ノズル
CN2530753Y (zh) * 2002-03-22 2003-01-15 淄博北工新特耐火材料有限公司 浸入式快速更换水口

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10258354A (ja) * 1997-03-14 1998-09-29 Shinagawa Refract Co Ltd 溶融金属注入用ノズル
JP2000343208A (ja) * 1999-06-02 2000-12-12 Kurosaki Harima Corp 摺動型浸漬ノズル
JP2002011566A (ja) * 2000-06-29 2002-01-15 Kawasaki Refract Co Ltd 溶融金属注入用ノズル

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101927340A (zh) * 2010-05-17 2010-12-29 王世泰 连铸用铝(锆)炭质长水口、浸入式水口及整体塞棒耐火制品
JP7461442B1 (ja) 2022-11-14 2024-04-03 黒崎播磨株式会社 連続鋳造用ノズル
WO2024106221A1 (fr) * 2022-11-14 2024-05-23 黒崎播磨株式会社 Buse de coulée continue

Also Published As

Publication number Publication date
CN102006949B (zh) 2013-04-03
CN102006949A (zh) 2011-04-06
JP2009255120A (ja) 2009-11-05
JP5001213B2 (ja) 2012-08-15
BRPI0909774A2 (pt) 2015-10-06

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