EP0784523A1 - Immersed pouring spout - Google Patents
Immersed pouring spoutInfo
- Publication number
- EP0784523A1 EP0784523A1 EP95930397A EP95930397A EP0784523A1 EP 0784523 A1 EP0784523 A1 EP 0784523A1 EP 95930397 A EP95930397 A EP 95930397A EP 95930397 A EP95930397 A EP 95930397A EP 0784523 A1 EP0784523 A1 EP 0784523A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pouring tube
- immersion pouring
- mold
- immersion
- tube
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000007654 immersion Methods 0.000 claims abstract description 79
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 17
- 239000000155 melt Substances 0.000 claims abstract description 12
- 238000009749 continuous casting Methods 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 5
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 claims description 11
- 239000011324 bead Substances 0.000 claims description 3
- 239000000161 steel melt Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 9
- 239000002893 slag Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
Definitions
- the invention relates to a dip tube for supplying molten steel in a long and wide sides having continuous casting mold, in particular for casting thin slabs, which is connected at one end to a casting container and at the other end protrudes into the mold to such an extent that during the casting operation the mouth into the mold immersed steel melt immersed.
- Immersion pipes have a round, predominantly circular or elliptical shape when they are connected to the casting tank. This shape can continue up to the mouth area of the immersion pouring tube, but it can also change into another shape, for example a rectangular shape.
- an immersion pouring tube is known whose at least in its section immersed in the melt has an essentially rectangular outer and inner cross section. The longitudinal edges of this immersion pouring tube run parallel to the long sides of the continuous casting mold, so that an optimal space for the flow cross section is used, in particular in the case of rectangular strand cross sections.
- the immersion pouring tube known from this document influences the melt flowing through the immersion pouring tube, in particular the exit pulse of the pouring jet.
- turbulence and eddies occur particularly in the area of the corners in the area of the mold wide side as a result of the flow of the steel.
- wave peaks and valleys occur in the area of the long sides of the immersion pouring tube, with the disadvantageous consequence of an uneven supply of slag in the area of the free mold cross section in the shadow of the immersion pouring tube. This leads to uneven lubrication and a non-uniform heat transfer between the strand shell formed from the liquid steel and the mold wall, which also results in the drawing in of slag and casting powder under the bath surface.
- the invention has set itself the goal of creating an immersed pouring tube which, in a structurally simple construction, dissipates the kinetic energy of the liquid steel in the region between the section of the immersed pouring tube immersed in the melt and the long sides of the mold and can be predetermined for the flow formation of the part in the mold To influence liquid steel in the area of the bath surface.
- the invention achieves this aim by the characterizing features of claim 1.
- the subclaims show advantageous developments.
- the molten steel leaving the immersion pouring tube initially moves in the direction of conveyance of the strand.
- the melt moves away from the mouth of the immersion pouring tube to a point at which the direction of flow of the liquid steel reverses and then, divided into two separate streams, near the broad sides the molds flow against the strand withdrawal direction to the bath surface
- the two separate streams of the liquid steel move in the direction of the immersion pouring tube, they are deflected on the outer walls of the immersing pouring tube, which are inclined towards the broad sides, and are guided into the space between the long side of the mold and the longitudinal side of the immersing pouring tube .
- the immersion pouring tube according to the invention has, regardless of the configuration of the inner tube wall, a tube outer wall shape which, at any immersion depth of the immersion pouring tube in the continuous casting mold, has an almost constant distance from the longitudinal sides of the mold. Shaped elements are provided on the broad sides of the immersion pouring tube in the area immersed in the melt, which provide minimal resistance to the horizontal flow of the melt located in the mold and the casting powder floating on it.
- the outer wall of the area of the immersion pouring tube which is immersed in the melt is either directly designed in such a way that a minimal flow resistance to the horizontally flowing melt is achieved, or independent components are provided which are arranged in front of the broadside of the immersion pouring tube.
- the immersion pouring tube inner wall as well as the immersion pouring tube outer wall are given shapes which each allow optimal flow conditions both in the immersion pouring tube and around the immersion pouring tube. Wall thickness changes will occur with one-piece immersion pipes.
- immersion pouring tubes are used which have a uniform wall thickness, which essentially depends on the shape of the inner tube wall.
- the broad side of the inner tube wall of the immersion pouring tube with a conical widening, preferably with an inclination angle of 4 ° to 7 °.
- the flow in the area of the casting mirror is influenced in such a way that it flows smoothly in a special way.
- the special configuration of the broadside outer contour of the immersion pouring tube can then have an optimal influence on the flow in the space between the longitudinal sides of the immersion tube and the long sides of the mold.
- the show 1 shows a section through two designs of the mold and the immersion pouring tube horizontally and vertically with a view of broad sides
- Fig. 2 and Fig. 3 longitudinal sections and muzzle cross-sections of different configurations.
- an immersion pouring tube 10 is shown, the inner tube wall of which is 11 and the outer tube wall of which is 12, the area on the casting container side is designated by 13 and the mouth area is designated by 14.
- the region 13 of the casting container is tubular and is connected to a casting container, not shown.
- the mouth region has an essentially flattened shape, the region 16 of which the width of the mold is significantly shorter than that of the region 17 of the long side of the mold.
- FIG. 1 shows a section through a mold 20, the mold long sides 21 and
- the immersion pouring tube 10 is arranged in the center of the mold 20. In the right part of the upper illustration in FIG. 1, the immersion pouring tube 10 has a rectangular shape
- a shaped element 31 designed as a wedge 32 is arranged in front of the mold-wide area 16. The long sides of the mold run essentially parallel.
- the distance of the tube outer wall 12 to the inner mold long side 21 having the maximum mold width B is designated by d.
- the left side of the immersion pouring tube 10 of the horizontal section in FIG. 1 is designed like a boat body 35.
- the immersion pouring tube 10 has a wedge-shaped center
- the current is sketched in the left part.
- the liquid material rises in the area of the mold broadside to the bath surface, shown here by arrowheads. From there, the current moves in the direction of the immersion pouring tube, divided evenly by the tip of the broad hull side of the immersion pouring tube. In the middle of the long side of the immersion pouring tube (represented by the arrow ends), the liquid steel flow moves in the direction of the strand withdrawal.
- the lower area of FIG. 1 shows vertical sections through the mold and the dip tube, specifically the section CC through a cambered mold and EE through a mold with parallel side walls.
- the outer tube wall 12 is designed such that it has a constant distance d from the inner wall of the long side 21 of the mold when the depth of immersion into the mold or the melt is different.
- Figures 2 and 3 have a section through an immersion pouring tube 10 which has a conical extension 15 on the mouth side, in which a wedge-shaped base piece 18 is provided in the center.
- the angle of inclination is 4 ° to 20 °.
- the outer tube wall 12 of the immersion pouring tube in the area immersed in the melt is configured on the side of the immersion tube in such a way that the horizontal flow of the molten steel and the pouring powder floating on it are opposed to a minimal resistance.
- the outer tube wall 12 is formed in the shape of a boat body 35, ending in a tip, and on the right-hand side a Taylor bead 34, which is also known from shipping, is provided. Both form elements can be designed even with a constant wall thickness of the dip tube (dashed line).
- FIG. 3 shows an immersion pouring tube 10, in which the shaped elements 31 are designed as independent components which are fastened to the immersion pouring tube by holding devices 37 as on the left side or by a retaining web 38 as on the right side.
- the immersion pouring tube 10 has a constant wall thickness.
- the shaped elements 31 designed as independent components can have any cross-sectional shapes, a semicircular outer contour 31 is shown in the left part and the shape of a wedge 32 in the right part.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Glass Compositions (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Coating Apparatus (AREA)
- Sampling And Sample Adjustment (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4436990 | 1994-10-07 | ||
| DE4436990A DE4436990C1 (en) | 1994-10-07 | 1994-10-07 | Immersed pouring pipe where the outer wall acts as a spacer |
| PCT/DE1995/001266 WO1996011078A1 (en) | 1994-10-07 | 1995-09-07 | Immersed pouring spout |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0784523A1 true EP0784523A1 (en) | 1997-07-23 |
| EP0784523B1 EP0784523B1 (en) | 2000-07-12 |
Family
ID=6530933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95930397A Expired - Lifetime EP0784523B1 (en) | 1994-10-07 | 1995-09-07 | Immersed pouring spout |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US5775552A (en) |
| EP (1) | EP0784523B1 (en) |
| JP (1) | JP3188473B2 (en) |
| KR (1) | KR100364687B1 (en) |
| CN (1) | CN1068261C (en) |
| AT (1) | ATE194531T1 (en) |
| AU (1) | AU3379695A (en) |
| BR (1) | BR9509232A (en) |
| DE (2) | DE4436990C1 (en) |
| RU (1) | RU2127171C1 (en) |
| WO (1) | WO1996011078A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1284035B1 (en) * | 1996-06-19 | 1998-05-08 | Giovanni Arvedi | DIVER FOR CONTINUOUS CASTING OF THIN SLABS |
| US6125916A (en) * | 1996-11-12 | 2000-10-03 | Giovanni Arvedi | Apparatus for the high-speed continuous casting of good quality thin steel slabs |
| IT1287156B1 (en) * | 1996-11-12 | 1998-08-04 | Giovanni Arvedi | PERFECTED SET OF EQUIPMENT FOR CONTINUOUS CASTING AT HIGH SPEED OF THIN SHEETS OF GOOD QUALITY |
| IT1290931B1 (en) * | 1997-02-14 | 1998-12-14 | Acciai Speciali Terni Spa | FEEDER OF MELTED METAL FOR INGOT MACHINES OF CONTINUOUS CASTING MACHINES. |
| DE10009073A1 (en) * | 1999-11-10 | 2001-05-17 | Sms Demag Ag | Mold has a funnel-shaped casting region having cooled wide side walls and narrow side walls with the region tapering in the casting direction to format the casting strand |
| DE10113026C2 (en) * | 2001-03-17 | 2003-03-27 | Thyssenkrupp Stahl Ag | Immersion tube for pouring molten metal, especially molten steel |
| CN100346909C (en) * | 2003-03-17 | 2007-11-07 | 维苏维尤斯·克鲁斯布公司 | Submerged entry nozzle with dynamic stabilization |
| DE102009012985A1 (en) * | 2009-03-12 | 2010-09-23 | Salzgitter Flachstahl Gmbh | Casting nozzle for a horizontal strip casting plant |
| WO2018210772A1 (en) | 2017-05-15 | 2018-11-22 | Vesuvius U S A Corporation | Asymetric slab nozzle and metallurgical assembly for casting metal including it |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1959097C2 (en) * | 1969-11-20 | 1973-10-04 | Mannesmann Ag, 4000 Duesseldorf | Device in continuous casting for distributing eggs molten steel |
| DE2442187A1 (en) * | 1974-09-02 | 1976-03-11 | Mannesmann Ag | SUBMERSIBLE SPOUT FOR USE IN CONTINUOUS CASTING PLANTS |
| GB8814331D0 (en) * | 1988-06-16 | 1988-07-20 | Davy Distington Ltd | Continuous casting of steel |
| US5205343A (en) * | 1989-06-03 | 1993-04-27 | Sms Schloemann-Siemag Aktiengesellschaft | Pouring tube for feeding molten steel into a continuous casting mold |
| DE4032624A1 (en) * | 1990-10-15 | 1992-04-16 | Schloemann Siemag Ag | SUBMERSIBLE PIPE FOR INLETING STEEL MELT IN A CONTINUOUS MOLD |
| DE4142447C3 (en) * | 1991-06-21 | 1999-09-09 | Mannesmann Ag | Immersion nozzle - thin slab |
| AT400935B (en) * | 1994-07-25 | 1996-04-25 | Voest Alpine Ind Anlagen | SUBMERSIBLE PIPE |
-
1994
- 1994-10-07 DE DE4436990A patent/DE4436990C1/en not_active Expired - Fee Related
-
1995
- 1995-09-07 KR KR1019970701985A patent/KR100364687B1/en not_active Expired - Fee Related
- 1995-09-07 AT AT95930397T patent/ATE194531T1/en not_active IP Right Cessation
- 1995-09-07 WO PCT/DE1995/001266 patent/WO1996011078A1/en not_active Ceased
- 1995-09-07 BR BR9509232A patent/BR9509232A/en not_active IP Right Cessation
- 1995-09-07 CN CN95195539A patent/CN1068261C/en not_active Expired - Fee Related
- 1995-09-07 EP EP95930397A patent/EP0784523B1/en not_active Expired - Lifetime
- 1995-09-07 RU RU97107331A patent/RU2127171C1/en not_active IP Right Cessation
- 1995-09-07 AU AU33796/95A patent/AU3379695A/en not_active Abandoned
- 1995-09-07 JP JP51224396A patent/JP3188473B2/en not_active Expired - Fee Related
- 1995-09-07 DE DE59508571T patent/DE59508571D1/en not_active Expired - Fee Related
- 1995-09-07 US US08/817,320 patent/US5775552A/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9611078A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE194531T1 (en) | 2000-07-15 |
| WO1996011078A1 (en) | 1996-04-18 |
| BR9509232A (en) | 1998-01-27 |
| JPH10506847A (en) | 1998-07-07 |
| DE4436990C1 (en) | 1995-12-07 |
| RU2127171C1 (en) | 1999-03-10 |
| US5775552A (en) | 1998-07-07 |
| AU3379695A (en) | 1996-05-02 |
| EP0784523B1 (en) | 2000-07-12 |
| CN1160369A (en) | 1997-09-24 |
| DE59508571D1 (en) | 2000-08-17 |
| CN1068261C (en) | 2001-07-11 |
| KR100364687B1 (en) | 2003-02-05 |
| JP3188473B2 (en) | 2001-07-16 |
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