WO2002081128A1 - Tauchgiessrohr zum einleiten von stahlschmelze in eine kokille oder in eine zwei-rollen-giessmaschine - Google Patents
Tauchgiessrohr zum einleiten von stahlschmelze in eine kokille oder in eine zwei-rollen-giessmaschine Download PDFInfo
- Publication number
- WO2002081128A1 WO2002081128A1 PCT/EP2002/003059 EP0203059W WO02081128A1 WO 2002081128 A1 WO2002081128 A1 WO 2002081128A1 EP 0203059 W EP0203059 W EP 0203059W WO 02081128 A1 WO02081128 A1 WO 02081128A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- section
- pouring tube
- cross
- width
- tube according
- Prior art date
Links
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
- B22D11/0642—Nozzles
Definitions
- Immersion pouring tube for introducing molten steel into a mold or into a two-roll casting machine
- the invention relates to an immersion pouring tube for introducing molten steel from a casting container into a mold consisting of broad side walls and narrow side walls, or into a two-roller casting machine, in particular for producing flat products, which has a pipe section that can be connected to the casting container and that is directed towards the narrow sides the mold or in the direction of the narrow side seal of the casting rolls in the width of the cross section, and is formed at the lower end with outlet openings.
- bath level fluctuations for example as a result of unstable flow conditions in the mold or below it, can lead to surface defects in the cast strand at relatively high throughput rates and / or speed ranges.
- pouring tubes dependent on format areas are often used. This requires the casting machine to be limited in flexibility and incurs additional costs.
- Document DE 41 42 447 C2 describes an immersion pouring tube for introducing molten steel from a casting container into a mold consisting of broad side walls and narrow side walls for the production of flat products, comprising a pipe piece arranged on the casting container, which extends in cross-section in the direction of the narrow side walls of the mold and is provided at the lower end with a centrally located bottom piece, leaving outlet openings for the melt.
- the inner wall of the cross The widening part of the immersion pouring tube forms flow channels together with the opposite wall parts of the base piece, the axes of which form an angle between 10 and 22 ° with the immersion pouring tube axis, the smaller angle making a distance between the narrow side walls of the mold of approximately 600 mm and the larger angle one
- the distance between the narrow side walls of the mold of 2000 mm and more is assigned and the distance between the wide side walls of the mold is 50 to 100 mm.
- Document DE 197 38 385 C2 also describes an immersion pouring tube for introducing melt from a pouring or intermediate container into a mold designed with broad and narrow side walls, in particular for the continuous casting of flat products.
- the immersion pouring tube shows a pipe section which can be connected to the casting or intermediate container and is designed as a flow channel, with flow guide bodies and with at least two outlet openings located above a base element relative to its central axis or to the center of gravity of its cross-sectional area.
- the height of a flow guide body decreases steadily downwards from an upper region of the flow channel and merges into its wall region in a lower region of the flow channel.
- the width, the height and the length or the position of a flow guide body can be varied over the length of the immersion pouring tube.
- the edges of a flow guide body are rounded.
- the base element has the flow-guiding shape of a wedge to be tapered on both sides. Additional flow guide bodies are arranged within the outlet openings.
- Document EP 1 002 600 A2 describes an immersion pouring tube which has a contour element and at least two outlet openings lying opposite in the direction of the narrow side walls.
- the contour element is made with a seamlessly merging combination of a solid floor element connecting the opposite wall areas with the height Hi and above Half of the same arranged flow dividers with a height H 2 provided in the direction of its longitudinal axis, which project from the wall areas into the pipe section of the flow channel without a fixed connection to opposite wall areas.
- the object of the invention is to design and improve a pouring tube in such a way that it can be used in a comparatively large speed and / or throughput range without the disadvantages described at the outset.
- this pouring tube concept should be suitable for use in slab systems for thick, medium-thick and thin dimensions as well as for the two-roll casting machine.
- a submerged pouring tube of the type mentioned in the preamble of claim 1 with the invention in that the pouring tube consists of an upper section with a circular cross-section on the inlet side, a middle section with a configuration for distributing the flow cross section in width, and a lower section Section exists, and that the distance of the inner walls of the lower section is greater on the inlet side than the distance of the inner walls of the central section on the inlet side, and that the width of the lower section increases with the formation of a flat cross section against the outlet.
- Figure 1 a an immersion pouring tube in the section of a plane along the central axis x-x;
- Figure 1b the immersion pouring tube in a sectional plane according to FIG. 1a, but rotated by 90 ° to the side view of the section.
- the immersion pouring tube for introducing molten steel from a casting container, not shown, into a mold, not shown, consisting of broad side walls and narrow side walls, in particular for producing flat products comprises a piece of pipe which can be connected to the casting container and which, in the direction of the narrow sides of the mold, has the width of Cross section is expanded and is formed at the lower end with outlet openings 16, 17 for the melt.
- the pouring tube 1 consists of an upper section 2 with a circular cross section on the inlet side, a central section 3 with a configuration for distributing the flow cross section 5 in width, and a lower section. section 4.
- the distance Ai of the inner walls of the lower section 4 is greater on the inlet side than the distance A 2 of the inner walls of the middle section on the inlet side.
- the width (B1) of the inner walls 10, 11 increases with the formation of a flat cross section 13 against the outlet.
- the upper section 2 merges continuously from a circular cross section on the inlet side to an oval-flat cross section with the walls 6, 7 on the outlet side.
- the ratio of the distances between the walls 6, 7 with respect to width and thickness in the case of the oval-flat cross section of the upper section 2 on the outlet side is between 1, 2 and 8.
- the cross-sectional transition of the central section 3 to the lower section 4 has arcuate surface parts 8, 9, the distances between which decrease in the direction of flow (S). This creates a flow resistance which leads to a more uniform flow distribution, thus improving the flow conditions in the mold and increasing the surface quality of the cast strand.
- the inner lateral walls A 2 of the central section 3 merge into the walls 10, 11 of the lower section 4, each with a convex shape.
- An embodiment of the dip tube provides that the inlet-side cross-sectional shape of the central section 3 connects to the outlet geometry of the upper section 2 and the section 3 has an outlet slot 12 on the outlet side, which extends approximately over the width of the cross-section.
- This outlet slot also brings about a calmed flow of the melt, so that the outflow velocity over the outlet cross-sections is evened out in the lower section of the pouring tube and thus a stable distribution of the melt in the mold is ensured.
- Further embodiments of the immersion pouring tube according to the invention provide that in the lower section 4 the ratio between the distance A 3 of the inner walls 10, 11 and their width Bi is between 1, 2 and 8, and that in some cases the distance A 3 of the inner walls 10, 11 of the lower section 4 is tapered in the flow direction S.
- the lower section 4 of the immersion casting tube 1 contains, as a flow divider, a flat, closed molded part with a lower base piece and lateral open outlets 16, 17 for the melt.
- the width B 2 of the base piece is between 30% and 80% of the width b of an outlet opening 16, 17.
- the height H of the base piece is greater than its width B 2 . It has a pair of guide surfaces 14, 15 which are designed to be concave against the flow direction S.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02759773A EP1385659A1 (de) | 2001-04-06 | 2002-03-20 | Tauchgiessrohr zum einleiten von stahlschmelze in eine kokille oder in eine zwei-rollen-giessmaschine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10117097.1 | 2001-04-06 | ||
DE2001117097 DE10117097A1 (de) | 2001-04-06 | 2001-04-06 | Tauchgießrohr zum Einleiten von Stahlschmelze in eine Kokille oder in eine Zwei-Rollen-Gießmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002081128A1 true WO2002081128A1 (de) | 2002-10-17 |
Family
ID=7680569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/003059 WO2002081128A1 (de) | 2001-04-06 | 2002-03-20 | Tauchgiessrohr zum einleiten von stahlschmelze in eine kokille oder in eine zwei-rollen-giessmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1385659A1 (de) |
DE (1) | DE10117097A1 (de) |
WO (1) | WO2002081128A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015189742A1 (en) | 2014-06-11 | 2015-12-17 | Arvedi Steel Engineering S.P.A. | Thin slab nozzle for distributing high mass flow rates |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4319195A1 (de) * | 1993-06-09 | 1994-12-15 | Didier Werke Ag | Mundstück eines Eintauchausgusses |
WO1995029025A1 (en) * | 1994-04-25 | 1995-11-02 | Vesuvius Usa | Submergent entry nozzle |
WO1998014292A1 (en) * | 1996-10-03 | 1998-04-09 | Vesuvius Crucible Company | Casting nozzle with diamond-back internal geometry and multi-part casting nozzle with varying effective discharge angles and method for flowing liquid metal through same |
US5961874A (en) * | 1996-03-29 | 1999-10-05 | Toshiba Ceramics Co., Ltd. | Flat formed submerged entry nozzle for continuous casting of steel |
-
2001
- 2001-04-06 DE DE2001117097 patent/DE10117097A1/de not_active Withdrawn
-
2002
- 2002-03-20 EP EP02759773A patent/EP1385659A1/de not_active Withdrawn
- 2002-03-20 WO PCT/EP2002/003059 patent/WO2002081128A1/de not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4319195A1 (de) * | 1993-06-09 | 1994-12-15 | Didier Werke Ag | Mundstück eines Eintauchausgusses |
WO1995029025A1 (en) * | 1994-04-25 | 1995-11-02 | Vesuvius Usa | Submergent entry nozzle |
US5961874A (en) * | 1996-03-29 | 1999-10-05 | Toshiba Ceramics Co., Ltd. | Flat formed submerged entry nozzle for continuous casting of steel |
WO1998014292A1 (en) * | 1996-10-03 | 1998-04-09 | Vesuvius Crucible Company | Casting nozzle with diamond-back internal geometry and multi-part casting nozzle with varying effective discharge angles and method for flowing liquid metal through same |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015189742A1 (en) | 2014-06-11 | 2015-12-17 | Arvedi Steel Engineering S.P.A. | Thin slab nozzle for distributing high mass flow rates |
US10569326B2 (en) | 2014-06-11 | 2020-02-25 | Arvedi Steel Engineering S.P.A. | Thin slab nozzle for distributing high mass flow rates |
Also Published As
Publication number | Publication date |
---|---|
DE10117097A1 (de) | 2002-10-10 |
EP1385659A1 (de) | 2004-02-04 |
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