WO2002064286A2 - Stranggiesskokille - Google Patents
Stranggiesskokille Download PDFInfo
- Publication number
- WO2002064286A2 WO2002064286A2 PCT/DE2002/000443 DE0200443W WO02064286A2 WO 2002064286 A2 WO2002064286 A2 WO 2002064286A2 DE 0200443 W DE0200443 W DE 0200443W WO 02064286 A2 WO02064286 A2 WO 02064286A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- continuous casting
- casting mold
- sections
- curved
- mold 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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/0408—Moulds for casting thin slabs
Definitions
- the invention relates to a continuous casting mold for the continuous casting of metal strips or thin slabs with a pouring area tapering in a funnel shape in the casting direction to the format of the cast strand, with two mold plates clamped together with curved pocket-shaped broad side wall sections.
- DE-PS 887 990 already describes water-cooled continuous casting molds with which narrow slabs, for example with dimensions of 450 mm ⁇ 20 mm, can be produced.
- the water-cooled mold for continuous casting has a much larger width than a thickness, the lower part of which consists of mutually opposing, parallel side and end walls, the width of the side walls of the elongated rectangular, vertically arranged molding chamber being much larger than that of the end walls.
- the end walls of the further mold part continue in a straight line in the upper mold part, while the side walls of the upper mold part expand upwards in a funnel shape.
- the upper mold part should be diamond-shaped in cross section.
- DE 36 40 525 C2 describes a continuous casting mold in which the broad side walls in the pouring area each consist of a first section, which run parallel or almost parallel to one another, and a subsequent section which reduces the thickness of the casting format, the first sections should reach below the level of the casting level to be set in the casting area.
- the funnel-shaped opening provided in the casting area is trapezoidal in cross section.
- EP 0 300 219 B1 also shows appropriately trapezoidal pouring areas.
- DE 43 43 124 A1 proposes a mold for the continuous casting of steel strip with wide side walls, which are to be formed in the funnel-shaped pouring area as a convex circular arc section and to the side of the funnel-shaped pouring area with inclined surfaces approaching one another towards the narrow sides.
- EP 0 552 501 proposes an embodiment in this regard in which the radii of the lateral arcs from the upper mold edge are constant in a section of the pouring region which extends at least 100 mm down from the upper mold edge, preferably even over the entire height of the pouring region.
- the partially rigid shell is subjected to pressure in the region of the pockets perpendicular to the casting direction, since its expansion in this direction is reduced over the length of the pockets. This inevitably leads to the deformation of the shells.
- the mold plates clamped together have curved pocket-shaped broad side wall sections (pouring areas) which essentially have an elliptical curvature in cross section.
- pouring pockets have the effect that the continuous casting shell, which has already solidified on the outer periphery, is pressed as far as possible uniformly against the inner wall of the mold at any location in the mold, which promotes the transverse deformation of the shell and likewise prevents jamming and promotes homogeneous solidification become.
- An elliptical curvature is to be understood as such a curvature that arises when an inclined cylinder is cut with a plane, each of the pockets of the mold plates lying opposite one another in mirror symmetry having a partially elliptical cross section.
- the pocket-shaped curved broad side wall section of both mold plates is preferably designed in such a way that its spatial curvature is the same size as the cut of an inclined cylinder with a plane-parallel plate.
- An advantage of such a design is in particular that the pocket-shaped protrusions counter can be made shorter in the casting direction by means of the solutions proposed according to the prior art and that the length of the guiding of the slab in the mold with its end cross section is thereby greater.
- the contour between the plane and the pocket can be provided with a radius between 5 mm and 100 mm, preferably 20 mm.
- the curved broad side sections extend up to 2 cm to 5 cm to the edge area (the narrow side) of each mold plate.
- the central (and therefore maximum) depth of the pocket (of the curved broad side section) is 40% to 60%, preferably 50% to 60%, of the mold plate height.
- the mold is conical outside of the pockets in the casting direction.
- the preferably used degree of taper is between 0.9% to 1.3% per 1 m, in particular 1% per 1 m.
- the metal melt supplied by means of an immersion tube protruding into the pouring area does not move in the form of a linear homogeneous flow in the continuous casting mold in the embodiments known according to the prior art.
- turbulence occurs in the upper mold area, which can lead to more dirt particles or other contaminants being entrained with the melt at the inlet, which are then trapped as a result of the non-linear melt bath movements.
- the pocket-shaped broad side wall sections have a non-linear section in longitudinal section Profile. Turbulence always occurs when there are large gradients of the flow velocity across the flow direction. The flow resistance in turbulent flows is considerably greater than in laminar flows, which is why it leads to turbulence and the associated risk of dirt particles mixing with the liquid or the resulting inclusions.
- the measure according to the invention of no longer making the longitudinal profile of the broad side wall sections linear over the height of the pouring region can surprisingly counteract strong turbulence in the molten metal.
- the longitudinal section profile can be concave or convex with a constant or changing radius of curvature over the height of the broad side wall sections.
- profile designs are also effective in which convex and concave profile sections adjoin one another in the direction of flow, wherein, for example, an approximately sinusoidal profile of the relevant longitudinal profile line can result.
- the longitudinal section profile can be composed of a plurality of sections, each with a different radius of curvature, it being possible to use either a strictly convex or concave course over the entire height or subsequent convex and concave sections.
- such broad side wall sections are also included with a longitudinal section profile, which is composed of adjacent linear sections, each of which is under a blunt winch. kel are arranged to each other, resulting in a total of a concave and / or convex profile contour. Possibly. To avoid niches in which turbulent flows threaten, the transition area can be rounded off by linear sections. Included in the sense of the invention are also such longitudinal section profiles in which partial areas are concave and / or convex and other partial areas are linear.
- An essentially elliptical curvature of the broad side walls has the effect that the continuous casting shell, which has already solidified on the outer periphery, is pressed as far as possible uniformly against the inner wall of the mold in the mold, which favors the transverse deformation of the shell and likewise prevents jamming and homogeneous solidification be promoted.
- the pocket-shaped curved broad side wall section of both mold plates is preferably designed in such a way that its spatial curvature is the same size as the cut of an inclined cylinder with a plane-parallel plate.
- An advantage of such a design is, in particular, that the pocket-shaped bulges can be made shorter in the casting direction compared to the solutions proposed according to the prior art, and that the end cross-section of the slab in the mold becomes longer as a result.
- the contour between the plane and the pocket can be provided with a radius between 5 mm and 100 mm, preferably 20 mm.
- the vaulted ten broad side sections extend up to 2 cm to 5 cm to the edge area (the narrow side) of each mold plate.
- the central (and therefore maximum) depth of the pocket (of the curved broad side section) is 40% to 60%, preferably 50% to 60%, of the mold plate height.
- 1 is a schematic perspective view of a continuous casting mold braced from one another
- Fig. 3a shows a section along the line I - 1 through the upper mold section
- Fig. 3b is a sketchy representation of a section of a cylinder with a plane-parallel plate.
- Fig. 4 shows a longitudinal section along the line I - I in Fig. 1 with a further embodiment
- the continuous casting mold essentially consists of two mold plates 10 and 11 braced together, which form broad side walls with their inner surfaces.
- the broad side walls are curved like a pocket, so that there is a immersion tube, not shown, can be introduced.
- the narrow side walls 12 and 13 have a significantly smaller width than the wide side walls.
- the pocket-shaped pouring opening denoted by 14 in FIG. 1 has the elliptical curvature shown in FIG. 2, which extends to a dimension a of 2 cm to 5 cm to the edge region of the broad side.
- Such a partially elliptical measure of curvature arises when a cylindrical shape 15 is cut with a plane 16 (cf. FIG. 5), the height h visible in FIG.
- FIGS. 1 to 3 in a plan view of the mold plate pocket resulting in a maximum of 50% to 60% of the total Mold height is.
- the respective curved recesses of the inner side of the mold plate are mirror-symmetrical to one another - also in their spatial design.
- the inner sides of the mold plates are flat and arranged parallel to one another.
- a further embodiment of the pocket-shaped broad side wall sections in longitudinal section according to the invention can be found in the exemplary embodiment according to FIGS. 4 to 10.
- the longitudinal profile is always not linear.
- a concave profile 20 or a convex profile 21 with a uniform direction of curvature extending over the entire height h can be selected.
- the radii of curvature can either be constant or, as shown in FIGS. 5 and 6, change in the casting direction.
- FIGS. 10 is composed of concaved and concave regions of different curvature arranged in a row.
- the convex and / or concave configuration is realized by respectively adjacent linear profile sections. 1, three linear sections 23, 24 and 25 are "strung together" to form a longitudinal profile, the respective adjoining linear sections forming an obtuse angle with one another. Overall, this results in a convex course, which represents a technically equivalent solution to the profile course 20 according to FIG. 5.
- profiles are provided in which a convex region 28 adjoins a concave region 26.
- the transition region 27 forms the turning point from a concave to a convex curvature.
- the radius of curvature is chosen to be significantly larger in the upper and lower areas relative to the central areas.
- FIG. 8 shows an essentially convex course which is realized by four adjoining linear profile areas 29 to 32.
- FIG. 9 shows a profile course roughly corresponding to the profile according to FIG. 7, in which respective linear pieces 33 to 36 can be seen, which adjoin one another at an angle that differs from 180 °.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10290453T DE10290453D2 (de) | 2001-02-09 | 2002-02-07 | Stranggießkokille |
US10/466,754 US6932147B2 (en) | 2001-02-09 | 2002-02-07 | Continuous casting ingot mould |
AU2002244616A AU2002244616A1 (en) | 2001-02-09 | 2002-02-07 | Continuous casting ingot mould |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001106328 DE10106328A1 (de) | 2001-02-09 | 2001-02-09 | Stranggießkokille |
DE10106328.8 | 2001-02-09 | ||
DE2001121753 DE10121753A1 (de) | 2001-05-04 | 2001-05-04 | Stranggießkokille |
DE10121753.6 | 2001-05-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002064286A2 true WO2002064286A2 (de) | 2002-08-22 |
WO2002064286A3 WO2002064286A3 (de) | 2003-04-17 |
Family
ID=26008472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/000443 WO2002064286A2 (de) | 2001-02-09 | 2002-02-07 | Stranggiesskokille |
Country Status (4)
Country | Link |
---|---|
US (1) | US6932147B2 (de) |
AU (1) | AU2002244616A1 (de) |
DE (1) | DE10290453D2 (de) |
WO (1) | WO2002064286A2 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8381385B2 (en) * | 2004-12-27 | 2013-02-26 | Tri-Arrows Aluminum Inc. | Shaped direct chill aluminum ingot |
US20060137851A1 (en) * | 2004-12-27 | 2006-06-29 | Gyan Jha | Shaped direct chill aluminum ingot |
ITMI20051762A1 (it) * | 2005-09-22 | 2007-03-23 | Danieli Off Mecc | Lingottiera per colata di bramme |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4249590A (en) * | 1977-04-06 | 1981-02-10 | Concast Ag | Method for continuous casting |
US4716955A (en) * | 1986-06-11 | 1988-01-05 | Sms Concast Inc. | Continuous casting method |
DE3640525A1 (de) * | 1986-11-27 | 1988-06-01 | Schloemann Siemag Ag | Kokille zum stranggiessen von stahlband |
EP0300219B1 (de) * | 1987-07-18 | 1991-08-21 | Sms Schloemann-Siemag Aktiengesellschaft | Kokille zum vertikalen Stranggiessen von Stahlband |
DE4343124A1 (de) * | 1993-12-17 | 1995-06-22 | Schloemann Siemag Ag | Kokille zum Stranggießen von Stahlband |
EP0552501B1 (de) * | 1992-01-20 | 1997-05-14 | Sms Schloemann-Siemag Aktiengesellschaft | Kokille zum Stranggiessen von Stahlband |
EP0904873A1 (de) * | 1997-09-27 | 1999-03-31 | Sms Schloemann-Siemag Aktiengesellschaft | Trichtergeometrie einer Kokille zum Stranggiessen von Metall |
DE20102524U1 (de) * | 2001-02-09 | 2001-07-12 | Evertz Egon Kg Gmbh & Co | Stranggießkokille |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE887990C (de) | 1951-05-07 | 1953-08-27 | Irving Rossi | Wassergekuehlte Stranggiessform |
NL6906955A (de) | 1969-03-06 | 1970-09-08 | ||
US4207941A (en) * | 1975-06-16 | 1980-06-17 | Shrum Lorne R | Method of continuous casting of metal in a tapered mold and mold per se |
DE3907351C2 (de) | 1989-03-08 | 1998-09-24 | Schloemann Siemag Ag | Eingießtrichter einer Kokille |
DE4131829C2 (de) | 1990-10-02 | 1993-10-21 | Mannesmann Ag | Flüssigkeitsgekühlte Kokille für das Stranggießen von Strängen aus Stahl im Brammenformat |
US5279354A (en) * | 1990-11-30 | 1994-01-18 | Acutus Industries, Inc. | Method of continuous casting with changing of slab width |
EP0498296B2 (de) * | 1991-02-06 | 2000-12-06 | Concast Standard Ag | Kokille zum Stranggiessen von Metallen, insbesondere von Stahl |
IT1252991B (it) | 1991-10-31 | 1995-07-10 | Danieli Off Mecc | Cristallizzatore per lingottiera per colata continua curva per bramme sottili |
IT1262073B (it) * | 1993-02-16 | 1996-06-19 | Danieli Off Mecc | Lingottiera per colata continua di bramme sottili |
IT1267243B1 (it) * | 1994-05-30 | 1997-01-28 | Danieli Off Mecc | Procedimento di colata continua per acciai peritettici |
-
2002
- 2002-02-07 DE DE10290453T patent/DE10290453D2/de not_active Ceased
- 2002-02-07 AU AU2002244616A patent/AU2002244616A1/en not_active Abandoned
- 2002-02-07 WO PCT/DE2002/000443 patent/WO2002064286A2/de not_active Application Discontinuation
- 2002-02-07 US US10/466,754 patent/US6932147B2/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4249590A (en) * | 1977-04-06 | 1981-02-10 | Concast Ag | Method for continuous casting |
US4716955A (en) * | 1986-06-11 | 1988-01-05 | Sms Concast Inc. | Continuous casting method |
DE3640525A1 (de) * | 1986-11-27 | 1988-06-01 | Schloemann Siemag Ag | Kokille zum stranggiessen von stahlband |
EP0300219B1 (de) * | 1987-07-18 | 1991-08-21 | Sms Schloemann-Siemag Aktiengesellschaft | Kokille zum vertikalen Stranggiessen von Stahlband |
EP0552501B1 (de) * | 1992-01-20 | 1997-05-14 | Sms Schloemann-Siemag Aktiengesellschaft | Kokille zum Stranggiessen von Stahlband |
DE4343124A1 (de) * | 1993-12-17 | 1995-06-22 | Schloemann Siemag Ag | Kokille zum Stranggießen von Stahlband |
EP0904873A1 (de) * | 1997-09-27 | 1999-03-31 | Sms Schloemann-Siemag Aktiengesellschaft | Trichtergeometrie einer Kokille zum Stranggiessen von Metall |
DE20102524U1 (de) * | 2001-02-09 | 2001-07-12 | Evertz Egon Kg Gmbh & Co | Stranggießkokille |
Also Published As
Publication number | Publication date |
---|---|
WO2002064286A3 (de) | 2003-04-17 |
DE10290453D2 (de) | 2004-01-15 |
US6932147B2 (en) | 2005-08-23 |
AU2002244616A1 (en) | 2002-08-28 |
US20040050529A1 (en) | 2004-03-18 |
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