EP0258469A1 - Dispositif de coulée de bandes d'acier dans une lingotière de coulée à double bandes - Google Patents
Dispositif de coulée de bandes d'acier dans une lingotière de coulée à double bandes Download PDFInfo
- Publication number
- EP0258469A1 EP0258469A1 EP86111981A EP86111981A EP0258469A1 EP 0258469 A1 EP0258469 A1 EP 0258469A1 EP 86111981 A EP86111981 A EP 86111981A EP 86111981 A EP86111981 A EP 86111981A EP 0258469 A1 EP0258469 A1 EP 0258469A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- section
- mold
- projections
- steel
- 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.)
- Withdrawn
Links
- 238000005266 casting Methods 0.000 title claims abstract description 90
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 16
- 239000010959 steel Substances 0.000 title claims abstract description 16
- 239000011214 refractory ceramic Substances 0.000 claims abstract description 6
- 239000000155 melt Substances 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 11
- 239000011261 inert gas Substances 0.000 claims description 8
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 238000009749 continuous casting Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 239000000161 steel melt Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
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
- B22D11/06—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
- B22D11/0645—Sealing means for the nozzle between the travelling surfaces
-
- 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
- the invention relates to a device for strip casting of steel in a double belt casting mold with continuous, continuous casting belts delimiting a mold space and endless side dams made of chain-like insulation blocks, into which a melt feed extends, the mold space in the inlet area, in which the melt feed is arranged, and on itself connects the front casting belt deflection drums, in the side view up to a casting belt intermediate drum with a constriction extending in the casting direction.
- a double belt casting mold of the type mentioned with moving (i.e. moving in the casting direction) mold walls for casting, in particular, aluminum and aluminum alloys is known from DE-PS 1 235 514; the melt feed protruding into the wedge-shaped inlet area of its mold space consists of a channel.
- the invention has for its object to design a device consisting of melt feed and double belt casting mold in such a way that it enables the casting of steel strip cross-sections, the strand produced being of sufficiently good quality.
- the object is achieved by a device with the features of claim 1.
- the basic idea of the invention is then to design the melt feed - depending on the cross section of the mold space of the double-belt casting mold - in the form of a tubular pouring nozzle or several adjacent pouring nozzles made of refractory ceramics, which - viewed in the casting direction - each have a tube section, a channel section and only one from its side wall sections has or have an existing end section; the pipe section is adapted over part of its longitudinal extent to the cross-sectional profile of the inlet area in order to enable the mold space to be sealed against air access from the outside.
- the insulating blocks that form the moving side dams are held above guide elements lying to the side next to the casting belt side edges and are equipped with peg-like projections which are rectangular in cross section and which, as an extension of the casting nozzle side walls in the mold area, protrude as a side boundary between the casting belts.
- the insulating blocks Due to the fact that the insulating blocks have a sealing component on the one hand and a special guide component outside the casting belts on the other, they can be made flatter than previously in the area between the casting belts.
- the idea of building the front section of the melt feeder from just two side walls (which accordingly corresponds to a sufficient wall thickness of the molds) room height can be adapted), corresponds to the equipment of the side dams with flat projections; these are moved past the outward-facing end sections of the melt feed in such a way that they form a continuous side boundary there (ie already in the region of the projecting side wall sections).
- the pouring nozzle side walls are expediently designed to be straight and parallel to one another, beginning with the end region of the tube section (claim 2); the outer dimension of the pouring nozzle therefore no longer changes in the end region of the tube section, in the channel section and in the end section with the projecting side wall sections.
- the supply of the molten steel into the mold space can be influenced favorably by the fact that the wall thickness of the pouring nozzle - at least that of the pouring nozzle bottom wall - decreases uniformly in the end region in the pouring direction (claim 3).
- the tube section is adapted to the cross section of the inlet area at least in the vicinity of the channel section and is provided on the end face with inert gas supply openings which can be connected to an inert gas source (claim 4).
- the protrusions of the insulation blocks which lie in the area of the mold space between the casting belts, consist of a copper alloy or refractory ceramic, while the insulation block parts supporting them (i.e. the guide components of the insulation blocks) are made of steel (claims 5 and 6).
- a further development of the subject matter of the invention is based the insulating block parts carrying the projections at least in the mold area from a guideway (claim 7), which can be equipped with at least one roller bearing (claim 8).
- the seals which are made of ceramic fiber material at least in the area of contact with the casting belts, each have a support arm and a rocker arm, which is supported with the interposition of a spring element on the support arm and on the associated casting belt.
- the casting belts are relatively narrow in relation to the existing geometric conditions: their width only corresponds to the width of the mold space plus the support width in the area of the two side dam projections.
- the main component of the device according to the invention is a double belt casting mold which has two endless casting belts 1 and 2 which, with two endless, moving side dams 3 and 4, also have a mold space 5 with a rectangular cross section for producing a band-shaped strand limit the low height H and large width B (cf. FIG. 3).
- Each casting belt 1, 2 runs on a front and rear deflection drum 6, 7 or 8, 9 (cf. FIG. 3) in such a way that the casting direction indicated by an arrow 10 in FIG. 1 corresponds to the direction of movement also the side dams 3, 4 in the area of the mold space 5 - results.
- the casting belt sections 1a and 2a which cover the mold space upwards and downwards, are supported by support rollers 11 and 12 resting on the casting belts; the support rollers 11 assigned to the first quarter of the length of the mold space are spring-supported, while the support rollers 12 adjoining them in the casting direction are held stationary.
- the upper casting belt 1 is additionally equipped with an intermediate drum 13.
- the steel melt to be processed by the double-belt casting mold is fed to the mold space 5 through a plurality of adjacent tubular pouring nozzles 14 which protrude into the inlet area E and extend into the area of the mold space, the longitudinal axis 5a of which is inclined at a flat angle with respect to the horizontal.
- the volume flow supplied through the individual casting nozzles is changed in such a way that the casting bath level G in the mold space 5 always takes a position near the casting nozzles.
- These consist of amorphous silica (SiO2) or alumina graphite (Al2O3).
- the pouring nozzle 14 (see FIG. 2a) has three differently shaped longitudinal sections in the casting direction (ie from left to right), namely a pipe section 14a narrowing in a wedge shape in the longitudinal direction with a correspondingly narrowing bore 14b, a channel section 14c in its area the bottom wall 14d associated with the pipe section ends and an end section 14e; this is formed exclusively by the sections 14 ⁇ of the side walls 14f (cf. FIG. 2c) in the area in which they protrude beyond the bottom wall 14d and thus beyond the channel section 14c.
- the end area 14g of these projecting side sections is slightly lower than the mold cavity height.
- the wall thickness of the bottom wall 14d decreases uniformly in its end region in the casting direction (arrow 10) (FIG. 2a).
- the pouring nozzle is adapted to the course of the inlet area E in such a way that between the moving mold walls 1 to 4 on the one hand and the top 14 ⁇ following the paragraph 14h, the associated side wall section 14 ⁇ and the bottom wall 14d of the mouthpiece on the other hand a relatively small one Distance exists.
- the side walls 14f follow the shoulder 14h in the form of the side wall sections 14 ⁇ in a straight line and parallel to one another.
- an inert gas cushion can be generated and maintained in the inlet area E, which shields the mold space 5 and the steel melt located therein from the entry of outside air.
- its bottom wall 14d is oriented in such a way that it extends at least approximately parallel to the longitudinal axis 5a of the mold space.
- each pouring nozzle is preferably supplied with molten steel via its own, cross-sectionally variable feed device.
- the feeder consists preferably of the bottom opening of an intermediate container, which interacts with a height-adjustable stopper rod.
- the insulating blocks 3a, 4a forming the side dams 3, 4 are in a block-shaped guide component 3b or 4b and in a sealing component 3c or 4c in the form of a peg-like or piston-like projection divided, which has a rectangular or square cross-section corresponding to the mold cavity height H and the axial length of the insulation blocks.
- the protrusions 4c (in the exemplary embodiment) made of a copper alloy are guided at a short distance past the side wall sections 14 ⁇ (see FIG. 2b) of the pouring nozzle 14 and subsequently form the side boundary of the mold space 5.
- the individual insulation blocks 3a and 4a are combined to form the continuous side dams 3, 4 (see FIG. 1) via the guide components 3b and 4b, in each of which a continuous steel strip 15 is accommodated in their recesses 3d and 4d as a connecting element is.
- the guide components 3b, 4b are supported next to the side edges of the casting belt sections 1a, 2a on a stationary guide track 16 in such a way that tilting movements of the projections 3c, 4c follow Possibility to be excluded.
- the guideway is equipped with two roller bearings, ie it takes place in two fixed cages 17, 17a Circulating rollers 17b on which the insulation blocks are supported in the horizontal or vertical direction outside the area of their deflection drums, not shown.
- the guide components 3b, 4b carrying these are made of steel.
- the advantage which is achieved with the lateral displacement of the side dam guide elements from the area of the casting belts is, in particular, that the components serving as side delimitation - corresponding to the design of the mold space 5 - can be made very flat if necessary.
- seals 18 are provided immediately after the mold space 5, which seals the casting belt sections 1a, 2a near their side edges 1b, 2b resiliently in contact with the projections 3c (and in a corresponding manner on the projections 4c, not shown).
- the seals 18 also ensure that the cooling water fed into the area of the casting belts cannot penetrate into the mold space.
- the seals 18 are equipped with a support arm 19 which is connected via a support plate 20 to the upper or lower frame, not shown, of the double belt casting mold and on which a bolt 19b a metal rocker 21 is movably attached. This is supported outside the bolt 19b via a prestressed spring 22 on the support arm 19 which is connected to a cooling water circuit via cooling water bores 19a. Since the lower seals 18 bearing on the casting belt 2a are additionally stressed, the associated springs must be designed or preloaded differently than the springs of the upper seals: these only have to absorb the pressure forces occurring in the mold space.
- the support arm 19 and the metal rocker 21 are equipped with a heat protection jacket 23, which is composed of two heat protection layers 24 and 24a made of greased ceramic fiber material .
- the outer heat protection layer 24a is supported under the action of the resilient metal rocker 21 via the casting belt 1a or 2a on the associated projection (for example 3c) and, with sufficient movement of the casting belts and projections, prevents steel melt from escaping from or the penetration of cooling water into the mold space 5.
- the end sections of the heat protection layers 24, 24a are connected to the support arm 19 via clamping elements 25, 26. Due to the use of the seals 18, the partially resiliently held support rollers 11 (see FIG. 1) arranged above or below the mold space are relatively short: their length is smaller than the width B in the embodiment shown in FIG. 4 of the mold room 5.
- the casting belts - and accordingly the casting belt sections 1a, 2a shown in FIG. 4 - should be as narrow as possible, since otherwise cold casting belt outer sections are present during the casting process, which hinder the elongation of the casting belts in the longitudinal direction.
- This requirement is taken into account in the subject matter of the invention in that the contact width D of the seals 18 is dimensioned from the point of view of a sufficient sealing effect and the side edges 1a, 2a protrude only slightly beyond the seals 18 laterally.
- the equalization of the temperature distribution in the casting belts results in less stress, a comparatively longer casting belt service life and a better cooling effect of the double belt casting mold.
- the inlet area E (see FIG. 1) is equipped with gas burners 27, which are stationary above the side dams and the guideway 16 are held with the cages 17, 17a (Fig. 5).
- the configuration according to the invention thus allows the pouring nozzle 14 in the operating position to be heated to a sufficiently high operating temperature by means of a fixed gas burner before initiating the pouring process and also prevents an undesired heat flow to the outside in the region of the pouring nozzle during the pouring process.
- the side dam projections (for example the projection 3c) can be produced from the refractory ceramic, from which the pouring nozzle also consists.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP86111981A EP0258469A1 (fr) | 1986-08-29 | 1986-08-29 | Dispositif de coulée de bandes d'acier dans une lingotière de coulée à double bandes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP86111981A EP0258469A1 (fr) | 1986-08-29 | 1986-08-29 | Dispositif de coulée de bandes d'acier dans une lingotière de coulée à double bandes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0258469A1 true EP0258469A1 (fr) | 1988-03-09 |
Family
ID=8195374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86111981A Withdrawn EP0258469A1 (fr) | 1986-08-29 | 1986-08-29 | Dispositif de coulée de bandes d'acier dans une lingotière de coulée à double bandes |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP0258469A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010102599A1 (fr) * | 2009-03-12 | 2010-09-16 | Salzgitter Flachstahl Gmbh | Buse de coulée pour une installation de coulée horizontale sur bande |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841660A (ja) * | 1981-09-04 | 1983-03-10 | Hitachi Ltd | 連続鋳造機における溶鋼注入方法 |
| EP0092844A1 (fr) * | 1982-04-28 | 1983-11-02 | Hazelett Strip-Casting Corporation | Procédé et installation pour l'alimentation et la coulée continue de métal liquide avec application d'un gaz inerte aux surfaces mobiles de moulage et au métal entrant |
-
1986
- 1986-08-29 EP EP86111981A patent/EP0258469A1/fr not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841660A (ja) * | 1981-09-04 | 1983-03-10 | Hitachi Ltd | 連続鋳造機における溶鋼注入方法 |
| EP0092844A1 (fr) * | 1982-04-28 | 1983-11-02 | Hazelett Strip-Casting Corporation | Procédé et installation pour l'alimentation et la coulée continue de métal liquide avec application d'un gaz inerte aux surfaces mobiles de moulage et au métal entrant |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 124 (M-218)[1269], 28. Mai 1983; & JP - A - 58 41660 (HITACHI) 10.03.1983 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010102599A1 (fr) * | 2009-03-12 | 2010-09-16 | Salzgitter Flachstahl Gmbh | Buse de coulée pour une installation de coulée horizontale sur bande |
| DE102009012984A1 (de) * | 2009-03-12 | 2010-09-23 | Salzgitter Flachstahl Gmbh | Gießdüse für eine horizontale Bandgießanlage |
| US8408279B2 (en) | 2009-03-12 | 2013-04-02 | Salzgitter Flachstahl Gmbh | Casting nozzle for a horizontal continuous casting system |
| DE102009012984B4 (de) * | 2009-03-12 | 2013-05-02 | Salzgitter Flachstahl Gmbh | Gießdüse für eine horizontale Bandgießanlage |
| RU2518864C2 (ru) * | 2009-03-12 | 2014-06-10 | Зальцгиттер Флахшталь Гмбх | Литьевое сопло для горизонтальной ленточной литейной установки |
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| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| AK | Designated contracting states |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18D | Application deemed to be withdrawn |
Effective date: 19880910 |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: FIGGE, DIETER, DIPL.-ING. |