WO2002076658A1 - Dispositif pour empecher un effet vortex de se produire dans la zone d'evacuation d'une cuve de fusion metallurgique - Google Patents

Dispositif pour empecher un effet vortex de se produire dans la zone d'evacuation d'une cuve de fusion metallurgique Download PDF

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Publication number
WO2002076658A1
WO2002076658A1 PCT/EP2002/002930 EP0202930W WO02076658A1 WO 2002076658 A1 WO2002076658 A1 WO 2002076658A1 EP 0202930 W EP0202930 W EP 0202930W WO 02076658 A1 WO02076658 A1 WO 02076658A1
Authority
WO
WIPO (PCT)
Prior art keywords
melting vessel
extension
openings
area
base part
Prior art date
Application number
PCT/EP2002/002930
Other languages
German (de)
English (en)
Inventor
Ewald Schumacher
Hubert Brenner
Christian Artner
Gerhard Brecka
Edgar Schumacher
Renata Franzky
Viktor Khloponin
Ivan Zinkovski
Original Assignee
Rhi Ag
Techcom Import Export Gmbh
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 Rhi Ag, Techcom Import Export Gmbh filed Critical Rhi Ag
Priority to UA2003109609A priority Critical patent/UA75398C2/uk
Priority to EA200300949A priority patent/EA005063B1/ru
Publication of WO2002076658A1 publication Critical patent/WO2002076658A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001—Retaining slag during pouring molten metal

Definitions

  • the invention relates to a device for preventing a vortex effect in the outlet area of a metallurgical melting vessel.
  • a tundish treatment vessel
  • the phenomenon of so-called vortex formation can be observed again and again.
  • a vortex is formed.
  • An uncontrolled flow of the melt occurs before and / or through the spout, with the result that particles of slag floating on the melt can be entrained.
  • Preventing or at least reducing non-metallic inclusions in the molten metal is a primary goal, particularly in the field of secondary metallurgy. There has therefore been no lack of attempts to minimize or prevent the observed vortex formation by means of different measures.
  • This includes the installation of refractory components in the outlet area, for example in the area of a freewheel nozzle.
  • the object of the invention is to show a possibility with which the vortex formation of a melt in the outlet area of a metallurgical melting vessel can be reliably prevented, at least under normal conditions.
  • the basic idea of the invention is to use a device made of a refractory ceramic material, which is arranged in the outlet area of the metallurgical melting vessel and covers the outlet area. In this way the ferrostatic pressure in the outlet area is reduced. Furthermore, the device should have one or more openings through which the melt located in the melting vessel can flow to the outlet region of the vessel, that is to say to the pouring spout.
  • a basic part of the device ensures that the melt is deflected on its way to the discharge area.
  • An extension adjoining the base part serves as a “flow breaker”, that is to say the melt flow is divided into a plurality of separate partial flows.
  • the openings are placed in such a way that they are at a distance from the bottom surface of the vessel in the assembled state of the device (in the metallurgical vessel)
  • the distance from the floor level can be> 20 mm and ⁇ 200 mm, for example 30 to 60, 60 to 80 or 70 to 100 mm.
  • the device thus makes the use of a so-called starter tube superfluous.
  • the melt filled in the vessel and / or a leading slag are prevented from flowing out via the spout until the melt level has reached the lower edge of the opening closest to the bottom of the vessel.
  • the invention relates to a device for preventing a vortex effect in the outlet area of a metallurgical melting vessel, with the following features:
  • the device consists of a refractory ceramic material
  • the device comprises a base part
  • a cylindrical extension adjoins the base part with at least one opening on the wall
  • the opening is arranged so that it is at a distance from the bottom of the melting vessel after placing the device in the outlet area of the melting vessel and creates a connection to the outlet region of the melting vessel.
  • cylindrical means “essentially cylindrical” and also includes, for example, bulbous shapes, polygonal cross sections or the like.
  • the device can be designed in the manner of a hood which is placed on the bottom of the metallurgical melting vessel, the outlet area being completely covered.
  • a cavity formed below the hood has a horizontal one above the bottom of the vessel at least at one point Cross-sectional area that is at least as large as the cross-sectional area of the outlet area in the area of the surface of the bottom (the bottom level) of the melting vessel.
  • this cavity is delimited by the extension mentioned, on the upper side by the base part of the device.
  • the openings / openings mentioned are provided in the wall area. According to one embodiment, several such openings are arranged regularly distributed in the wall area.
  • An optimization of the flow distribution i.e. a breakdown of the flow of the molten metal into individual partial flows, is achieved if the device is designed to be rotationally symmetrical, namely rotationally symmetrical with respect to an imaginary axis running through its center of gravity (axis of symmetry).
  • the symmetry can also be defined in relation to an imaginary central longitudinal axis of the extension or the entire device.
  • the base part of the device can be convexly curved with respect to the extension or the outlet area, so that the hood takes on a kind of bell shape, the wall area of the extension being able to adjoin the base part in a substantially cylindrical manner.
  • the hood design includes embodiments in which the device is designed in the manner of a spherical segment, in the manner of a cuboid, in the manner of a pyramid or in the manner of a cylinder. Unsymmetrical shapes and cross-sections are also possible, or hoods with a concave top surface (based on the outlet area).
  • the openings can be designed as channels with different slopes.
  • the geometric design of the device and its parts can vary within wide limits and depends on the respective application.
  • the openings (connecting channels) can have a semicircular or circular cross section, rectilinear or curved, optionally also involute in the direction of an area around the central longitudinal axis of the device.
  • the openings can be designed as slots which run essentially in the axial direction of the device (axial direction of the spout). Symmetrical and asymmetrical shapes and cross sections are possible.
  • the cross-sectional area of the entirety of the openings should be larger than the cross-sectional area of the outlet area at the level of the surface of the bottom of the melting vessel.
  • the device can be conically tapered at the end opposite the base part. Is the shape corresponding (to the inner) shape of the spout, the device can be easily placed in the pouring area, for example also mortared or glued. A positive connection is also particularly tight. Profiles on the outer surface of the end part of the device are helpful.
  • the figures show examples.
  • the device can be in one piece and can be produced in one process step. This applies even to a version with a tapered end part. Reference is made to the known production processes such as slip casting (for porcelain) or the burning out of temporary inserts to form cavities.
  • the distance between the base part and the spout at the level of the floor is usually up to 250 mm.
  • the cross-sectional area of the base part should be selected so that it covers the mentioned inlet of the spout on all sides by at least 20 mm, a degree of coverage of 100 mm being generally sufficient.
  • Figure 1 a longitudinal section through part of a metallurgical melting vessel in the bottom discharge area with two alternative designs of a device according to the invention
  • Figure 2 an analog representation as Figure 1, but for a third embodiment.
  • reference numeral 10 designates a base of a metallurgical tank, here a distributor (tundish).
  • the base 10 formed from refractory material of the usual type is delimited on the outside (underside) by a steel jacket 12.
  • two pouring stones 14 are shown schematically, each having a central outflow opening 16, which is funnel-shaped at its upper end facing a molten metal 18. This results in a diameter “d” of the outlet openings 16 in the region of a surface 10 of the base 10.
  • Each outlet area 16 is covered by a device 20, the device 20 shown on the left in the figure being explained first:
  • This is designed like a hood and has a base part 20b which is convex with respect to the pouring stone 14 and which is adjoined by a substantially cylindrical extension (wall section 20w) which stands with its (lower) free end on the surface 10o of the base 10.
  • a substantially cylindrical extension (wall section 20w) which stands with its (lower) free end on the surface 10o of the base 10.
  • a plurality of openings 22 with a circular cross section are arranged in a uniformly distributed manner.
  • the distance to the ground level lOo is indicated by "h” and is 72 m.
  • the molten metal 18 is deflected on its way to the outflow opening 16 around the base part 20b and, according to the number of openings 22 (here: eight pieces, which are evenly distributed over the circumference of the wall part 20w), is divided into eight partial flows, which form a common cavity 20h open, which is delimited at the top by the base part 20b, laterally by the wall part 20w and partly by the bottom 10 below.
  • the sections 20s between the openings 22 and the bottom surface 10o prevent melt or slag from flowing out in an uncontrolled manner, in particular when pouring on.
  • the device 20 shown on the right in FIG. 1 likewise comprises a base part 20b which is designed in the manner of a circular plate from which a cylindrical extension 20w projects in the direction of the base 10 of the melting vessel, this wall region 20w again on the surface lOo of the floor 10 stands up.
  • melt 18 is divided into partial flows, which are led through the connection openings 22 into the cavity 20h and from there through the outlet area 16.
  • the wall sections 20s ensure that the device can take over the function of a starter tube.
  • FIG. 1 shows in both embodiments that the respective base part 20b of the devices 20 runs at a distance above the bottom 10 and the extensions 20w surround the outlet opening 16 for the molten metal on all sides at a distance, the distance from the edge region of the outlet opening 16th to the inner wall surface of the extension 20w is larger than the diameter d of the outlet opening 16 in the area of the surface 10o of the base 10.
  • FIG. 2 shows an alternative embodiment, as can also be used in a melting vessel according to FIG. 1.
  • the device 20 according to FIG. 2 is similar to the right variant in FIG. 1 with the following special feature: the (horizontal) cross section is smaller and an end section 20e adjoins the cylindrical wall section 20w, which is open at the bottom and tapers conically.
  • the outer contour of the end section 20e corresponds approximately to the inner contour of the upper pouring part, so that the device 20 can be positively placed in the upper pouring part, a mortar layer 50 compensating for tolerances.
  • a surface profile 20p of the end section 20e optimizes the connection.
  • a small hole 60 in the base part 20b makes it possible to remove gases which could otherwise collect in the cavity 20h.
  • the hole 60 can be formed by burning out a filling part inserted in situ during manufacture.
  • the devices described can be cast refractory parts. It is also possible to press or stamp the parts, depending on the design.
  • the selection of the respective refractory grade depends on the respective application. There are no special requirements for the refractory material. It must be temperature-resistant in the usual way and as erosion-resistant as possible and should also have favorable ductility properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Extrusion Of Metal (AREA)

Abstract

L'invention concerne un dispositif en matériau céramique réfractaire, utilisé pour empêcher un effet vortex de se produire dans la zone d'évacuation d'une cuve de fusion métallurgique, qui comprend une partie de base à laquelle se raccorde un prolongement cylindrique comportant au moins une ouverture côté paroi. L'ouverture est disposée de manière à présenter un écart par rapport au fond de la cuve de fusion, après positionnement dudit dispositif dans la zone d'évacuation de la cuve de fusion et à créer une jonction avec la zone d'évacuation de la cuve de fusion.
PCT/EP2002/002930 2001-03-27 2002-03-16 Dispositif pour empecher un effet vortex de se produire dans la zone d'evacuation d'une cuve de fusion metallurgique WO2002076658A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
UA2003109609A UA75398C2 (en) 2001-03-27 2002-03-16 Method for preventing a vortex effect in the discharge area of a metallurgical melting vessel
EA200300949A EA005063B1 (ru) 2001-03-27 2002-03-16 Устройство для предотвращения эффекта завихрения в зоне выпускного отверстия металлургической плавильной емкости

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001115097 DE10115097A1 (de) 2001-03-27 2001-03-27 Einrichtung zur Verhinderung eines Vortex-Effekts im Auslaufbereich eines metallurgischen Schmelzgefäßes
DE10115097.0 2001-03-27

Publications (1)

Publication Number Publication Date
WO2002076658A1 true WO2002076658A1 (fr) 2002-10-03

Family

ID=7679259

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/002930 WO2002076658A1 (fr) 2001-03-27 2002-03-16 Dispositif pour empecher un effet vortex de se produire dans la zone d'evacuation d'une cuve de fusion metallurgique

Country Status (6)

Country Link
CN (1) CN1254335C (fr)
DE (1) DE10115097A1 (fr)
EA (1) EA005063B1 (fr)
LV (1) LV13102B (fr)
UA (1) UA75398C2 (fr)
WO (1) WO2002076658A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009013869A1 (de) 2009-03-18 2010-09-23 Sms Siemag Aktiengesellschaft Metallurgisches Gefäß, insbesondere Elektrolichtbogenofen

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102554207A (zh) * 2012-01-17 2012-07-11 中冶南方工程技术有限公司 一种防止旋涡产生的滑动水口装置
CN102632228A (zh) * 2012-04-27 2012-08-15 宜兴市龙宸炉料有限公司 一种含出液口挡渣装置中间包
CN111136255B (zh) * 2020-01-20 2022-01-04 武汉科技大学 一种抑制中间包下渣的控流结构
CN111266564B (zh) * 2020-03-12 2022-04-05 安徽工业大学 一种用于限制钢包漩涡产生的阻漩装置及其应用
CN112108642A (zh) * 2020-09-29 2020-12-22 重庆大学 一种防止钢液卷渣的钢包及方法
CN112207268B (zh) * 2020-10-21 2021-08-31 武汉钢铁有限公司 一种用于钢包底部的圆形阻漩装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0401988A2 (fr) * 1989-06-08 1990-12-12 Foseco International Limited Dispositif pour retenir et/ou verser pour cuves pour bains de métaux coulées
US5083754A (en) * 1991-06-20 1992-01-28 Bethlehem Steel Corporation Apparatus for retaining slag during the discharge of molten metal from a tundish

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6340668A (ja) * 1986-08-06 1988-02-22 Nippon Kokan Kk <Nkk> 溶湯流出口を備えた溶湯容器
JPS6372475A (ja) * 1986-09-16 1988-04-02 Nkk Corp 溶湯流出口を備えた溶湯容器
US5171513A (en) * 1992-05-12 1992-12-15 Usx Corporation Refractory article for preventing vortexing in a metallurgical vessel
CA2084845A1 (fr) * 1992-12-08 1994-06-09 Roderick I.L. Guthrie Regulateur de debit servant a supprimer les tourbillons

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0401988A2 (fr) * 1989-06-08 1990-12-12 Foseco International Limited Dispositif pour retenir et/ou verser pour cuves pour bains de métaux coulées
US5083754A (en) * 1991-06-20 1992-01-28 Bethlehem Steel Corporation Apparatus for retaining slag during the discharge of molten metal from a tundish

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009013869A1 (de) 2009-03-18 2010-09-23 Sms Siemag Aktiengesellschaft Metallurgisches Gefäß, insbesondere Elektrolichtbogenofen

Also Published As

Publication number Publication date
EA005063B1 (ru) 2004-10-28
EA200300949A1 (ru) 2004-06-24
CN1254335C (zh) 2006-05-03
UA75398C2 (en) 2006-04-17
CN1525894A (zh) 2004-09-01
DE10115097A1 (de) 2002-10-24
LV13102B (en) 2004-04-20

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