CA2228180A1 - A machine and a method for casting a metal strip - Google Patents
A machine and a method for casting a metal strip Download PDFInfo
- Publication number
- CA2228180A1 CA2228180A1 CA002228180A CA2228180A CA2228180A1 CA 2228180 A1 CA2228180 A1 CA 2228180A1 CA 002228180 A CA002228180 A CA 002228180A CA 2228180 A CA2228180 A CA 2228180A CA 2228180 A1 CA2228180 A1 CA 2228180A1
- Authority
- CA
- Canada
- Prior art keywords
- molten metal
- belt
- casting
- strip
- side walls
- 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.)
- Abandoned
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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
-
- 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
-
- 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
- B22D11/0648—Casting surfaces
- B22D11/066—Side dams
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Coating With Molten Metal (AREA)
Abstract
Thin metal strips, for example wide carbon steel strips, are cast in a single belt machine. The width of the molten metal on the belt is defined by side dams (12, 13) on the belt (11). The side dams have inwardly directed surfaces against the molten metal which makes the surface of the molten metal even also at its edges.
Description
W o 97/06906 PCT/SE96/01020 A - ~ ~and a ~ forcasting a metalstrip This invention relates to a strip casting m~r~ine comprising a cooled and power driven endless belt with side dams~ and a device for supplying molten metal to the upper side of a flat and ~ul,~ lly horizontal part of the endless belt. It relates also to a method of casting a metal strip.
A single belt strip casting m~hine ofthis kind is described in WO 93/01015.
When casting strips, there will usually be edge drops, that is the edges will be thinner, so that the edges must be cut away.
It is an object of the invention to counteract edge drop and this is accomplished principally by having inwardly inclined side dams. Another object is to permit the casting of thinner strips than has been possible before. To these ends, the invention has been given the characteristics stated in the claims.
The invention will be described with reference to the accompanying drawings.
Figure I is a fr~gment~ry perspective view of a strip casting machine in accordance with the invention, Figure 2 is a fragmentary longitudinal section through a m~l~hine that is somewhat modified from the machine in Figure 1, Figure 3 is a transverse section taken along line 2-2 in Figure 3, and Figure 4 is a schematic transverse section through a strip cast by a machine described, the width and thickness of the strip being not in scale.
The m~rl~ine shown in Figure 1 has a substantially horizontal. water cooled, and power driven belt 11 of a heat conductive material for example copper. The belt 11 has side darns 12, 13 which can be movable with the belt, but which can also be fixed. They can advantageously be movable laterally and fixed in various lateral positions so that strips of various width can be cast. Above the belt, there is a tundish 14 that functions as a distributor of molten metal. It has a number of ceramic nozzles distributed over the entire SUB~ ~ ~ ~ ~TE SHEEr width of the belt so that they produce several separate jets that meet the belt 11 which moves as in-lic~t~d by the arrow 15. The orifices should be so located that the molten metal flows out and solidifies as a cast thin continuous strip 29 on the substrate, that is, on the movable belt 1 1. A container 16, for example a furnace or a ladle, supplies a controlled flow of molten metal to the tundish/distributor 14. The flow out of the cont~iner 16 can be regulated in various conventional ways, for example by means of a stopper rod or a sliding gate nozzle.
The Figures 3 and 4 show a design which is somewhat modified from the design shown in Figure 1. The container is replaced by a rotatable tube 17 of the kind disclosed in WO
9301015. The level of the molten metal in the tube 17 is kept constant by means of a non-illustrated regulator that regulates the supply of molten metal to the tube 17. The tube 17 has an outlet 18 in the form of a slot and the flow out of the tube can be regulated by turning of the tube 17 since such turning changes the ferrostatic pressure that drives the flow out through the slot 18. The tundish 14 has two fixed walls 20, 21 that slows down the flow in the tundish and make the flow laminar before it reaches orifices 22. The endless belt I 1 is cooled by a large number of cooling noz7.1es 23 that eject water jets against the underside of the belt 11 so that the molten metal solidifies on the copper belt into a cast continuous strip.
Since the endless belt 11 moves fast when the vertical and parallel jets 30 from the orifices 22 of the tundish meet the belt 11 and the molten metal does not wet the belt. the molten metal will not flow backwardly on the belt and a rear da~n is therefore not ~-~ce~!~n.y. The molten metal should flow out on the belt 11 into an even layer and the distance between the jets 30 must therefore not be too big. There is no contact between the tundish/distributor 14 and the belt 1 1 and the side dams 12, 13 of the belt, which is advantageous particularly when a casting is ended or if a casting goes wrong, since the molten metal cannot freeze on the mzl~hine and prevent it from being started again. The jets are shown vertical but they can also be inclined. Another tundish/distributor can quickly and easily be exchanged for the one on the machine when one wants to cast strips b of another width or one wants to change to a casting process that needs other orifices or another number of orifices since the tundish is neither coupled to the endless belt 11 nor SUB~ JTE SHE~ET
W O 97/06906 PCT~E96/01020 to the container 16 or 17. The number of orifices and their size need to be varied in relation to the combination of strip width, belt velocity, viscosity of the molten metal, and desired thickness of the strip.
The side dams 13,14 are shown having inwardly inclined walls. A steel strip 29 is shown in Figure 1, which has been cast with the machine described. Because of the inward inclination of the side dams, the metal surface is hol;GonL~I along the lines in which solid matter (the dams), the molten metal, and gas (argon) meet. If the surfaces of the dams should instead be vertical, the surface would bend downwards at the edges since the molten metal does not wet the side dams. The inclined dams in combination with the supply of molten metal in the form of separate jets make the upper surface of the strip very even. It will also be possible to cast thinner strips when the influence of the surface tension is counteracted in this way. The inclination of the side walls of the dams 12,13 should be chosen so that it matches the angle of wetting in order to get a flat surface of the molten metal.
It should be understood that the figures are schematic and frz-gm~nt~ry. A cover is for example not shown. Such a cover holding a protective atmosphere, e.g. argon, protects the free jets of molten metal and the free surface of the molten metal on the belt from being oxidised.
The strip casting machine according to the invention can be made in different sizes and for various kinds of metals and alloys. It can for example be suited for fast casting of carbon steel in strip thi~kn~sses down to 6 mm or less and for strip widths of up to 2 metres or more.
SUBSlllUTE SHE~Er
A single belt strip casting m~hine ofthis kind is described in WO 93/01015.
When casting strips, there will usually be edge drops, that is the edges will be thinner, so that the edges must be cut away.
It is an object of the invention to counteract edge drop and this is accomplished principally by having inwardly inclined side dams. Another object is to permit the casting of thinner strips than has been possible before. To these ends, the invention has been given the characteristics stated in the claims.
The invention will be described with reference to the accompanying drawings.
Figure I is a fr~gment~ry perspective view of a strip casting machine in accordance with the invention, Figure 2 is a fragmentary longitudinal section through a m~l~hine that is somewhat modified from the machine in Figure 1, Figure 3 is a transverse section taken along line 2-2 in Figure 3, and Figure 4 is a schematic transverse section through a strip cast by a machine described, the width and thickness of the strip being not in scale.
The m~rl~ine shown in Figure 1 has a substantially horizontal. water cooled, and power driven belt 11 of a heat conductive material for example copper. The belt 11 has side darns 12, 13 which can be movable with the belt, but which can also be fixed. They can advantageously be movable laterally and fixed in various lateral positions so that strips of various width can be cast. Above the belt, there is a tundish 14 that functions as a distributor of molten metal. It has a number of ceramic nozzles distributed over the entire SUB~ ~ ~ ~ ~TE SHEEr width of the belt so that they produce several separate jets that meet the belt 11 which moves as in-lic~t~d by the arrow 15. The orifices should be so located that the molten metal flows out and solidifies as a cast thin continuous strip 29 on the substrate, that is, on the movable belt 1 1. A container 16, for example a furnace or a ladle, supplies a controlled flow of molten metal to the tundish/distributor 14. The flow out of the cont~iner 16 can be regulated in various conventional ways, for example by means of a stopper rod or a sliding gate nozzle.
The Figures 3 and 4 show a design which is somewhat modified from the design shown in Figure 1. The container is replaced by a rotatable tube 17 of the kind disclosed in WO
9301015. The level of the molten metal in the tube 17 is kept constant by means of a non-illustrated regulator that regulates the supply of molten metal to the tube 17. The tube 17 has an outlet 18 in the form of a slot and the flow out of the tube can be regulated by turning of the tube 17 since such turning changes the ferrostatic pressure that drives the flow out through the slot 18. The tundish 14 has two fixed walls 20, 21 that slows down the flow in the tundish and make the flow laminar before it reaches orifices 22. The endless belt I 1 is cooled by a large number of cooling noz7.1es 23 that eject water jets against the underside of the belt 11 so that the molten metal solidifies on the copper belt into a cast continuous strip.
Since the endless belt 11 moves fast when the vertical and parallel jets 30 from the orifices 22 of the tundish meet the belt 11 and the molten metal does not wet the belt. the molten metal will not flow backwardly on the belt and a rear da~n is therefore not ~-~ce~!~n.y. The molten metal should flow out on the belt 11 into an even layer and the distance between the jets 30 must therefore not be too big. There is no contact between the tundish/distributor 14 and the belt 1 1 and the side dams 12, 13 of the belt, which is advantageous particularly when a casting is ended or if a casting goes wrong, since the molten metal cannot freeze on the mzl~hine and prevent it from being started again. The jets are shown vertical but they can also be inclined. Another tundish/distributor can quickly and easily be exchanged for the one on the machine when one wants to cast strips b of another width or one wants to change to a casting process that needs other orifices or another number of orifices since the tundish is neither coupled to the endless belt 11 nor SUB~ JTE SHE~ET
W O 97/06906 PCT~E96/01020 to the container 16 or 17. The number of orifices and their size need to be varied in relation to the combination of strip width, belt velocity, viscosity of the molten metal, and desired thickness of the strip.
The side dams 13,14 are shown having inwardly inclined walls. A steel strip 29 is shown in Figure 1, which has been cast with the machine described. Because of the inward inclination of the side dams, the metal surface is hol;GonL~I along the lines in which solid matter (the dams), the molten metal, and gas (argon) meet. If the surfaces of the dams should instead be vertical, the surface would bend downwards at the edges since the molten metal does not wet the side dams. The inclined dams in combination with the supply of molten metal in the form of separate jets make the upper surface of the strip very even. It will also be possible to cast thinner strips when the influence of the surface tension is counteracted in this way. The inclination of the side walls of the dams 12,13 should be chosen so that it matches the angle of wetting in order to get a flat surface of the molten metal.
It should be understood that the figures are schematic and frz-gm~nt~ry. A cover is for example not shown. Such a cover holding a protective atmosphere, e.g. argon, protects the free jets of molten metal and the free surface of the molten metal on the belt from being oxidised.
The strip casting machine according to the invention can be made in different sizes and for various kinds of metals and alloys. It can for example be suited for fast casting of carbon steel in strip thi~kn~sses down to 6 mm or less and for strip widths of up to 2 metres or more.
SUBSlllUTE SHE~Er
Claims (5)
1. A strip casting machine comprising a cooled and power driven endless belt (11) with side walls (12, 13) and a device (14) for supplying molten metal to the upper side of a flat and substantially horizontal part of the endless belt, characterised in that the side walls (12, 13) have inwardly inclined sides facing the melt.
2. A machine according to claim 2, characterised in that the endless belt (11) has no rear wall and a distributor (14) is arranged with a plurality of orifices for pouring molten metal directly onto the belt.
3. A machine according to claim 2, characterised in that the distributor (14) comprises a tundish (14) arranged to be supplied with a controlled flow of molten metal from a ladle (16).
4. A method of casting a metal strip by supplying molten metal to a cooled and power driven endless belt (11) while limiting the width of the molten metal by side walls (12, 13) on the belt, characterised in that one uses side walls (12, 13) which have inwardly inclined sides that face the melt and chooses an inclination that matches the angle of wetting so that the surface of the molten metal will be flat.
5. A method according to claim 4, characterised in that the molten metal is poured on to the belt in the form of a plurality of free streams (30) which are so close that the molten metal flows out to an even layer on the belt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9502867A SE508311C2 (en) | 1995-08-16 | 1995-08-16 | Method and apparatus for directly casting thin metal strips |
| SE9502867-6 | 1995-08-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2228180A1 true CA2228180A1 (en) | 1997-02-27 |
Family
ID=20399208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002228180A Abandoned CA2228180A1 (en) | 1995-08-16 | 1996-08-16 | A machine and a method for casting a metal strip |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0859675B1 (en) |
| JP (1) | JP3567225B2 (en) |
| KR (1) | KR100443113B1 (en) |
| AT (1) | ATE201341T1 (en) |
| AU (1) | AU6760596A (en) |
| CA (1) | CA2228180A1 (en) |
| CZ (1) | CZ44198A3 (en) |
| DE (1) | DE69612992T2 (en) |
| SE (1) | SE508311C2 (en) |
| WO (1) | WO1997006906A1 (en) |
| ZA (1) | ZA966913B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7033632B2 (en) * | 2002-05-06 | 2006-04-25 | Schreiber Foods, Inc. | Casting food products to controlled dimensions |
| DE102008031476A1 (en) | 2007-08-16 | 2009-02-19 | Sms Demag Ag | caster |
| DE102007055346A1 (en) * | 2007-11-19 | 2009-05-20 | Sms Demag Ag | Casting machine with a device for application to a casting belt |
| DE102009054218A1 (en) | 2009-10-21 | 2011-05-19 | Sms Siemag Ag | Method and device for lateral flow guidance of a molten metal during strip casting |
| JP6037332B2 (en) * | 2013-03-18 | 2016-12-07 | 学校法人常翔学園 | Metal plate casting method and metal plate casting apparatus |
| DE102014224236A1 (en) | 2014-11-27 | 2016-06-02 | Sms Group Gmbh | Device for strip casting of metallic products |
| CN109248994B (en) * | 2017-08-19 | 2021-05-25 | 福建省长汀金龙稀土有限公司 | Casting device and casting method for thin strip |
| KR102033642B1 (en) * | 2017-12-11 | 2019-11-08 | 주식회사 포스코 | Processing apparatus for molten material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS571547A (en) * | 1980-06-04 | 1982-01-06 | Hitachi Ltd | Rotary ring-one side belt type continuous casting device |
| US4694885A (en) * | 1985-06-06 | 1987-09-22 | Hitachi Zosen Corporation | Apparatus for continuous casting of thin metallic plate |
| DE3707897A1 (en) * | 1987-03-12 | 1988-09-22 | Mannesmann Ag | METHOD AND CASTING DEVICE FOR CASTING METAL STRIPS, ESPECIALLY STEEL |
-
1995
- 1995-08-16 SE SE9502867A patent/SE508311C2/en not_active IP Right Cessation
-
1996
- 1996-08-15 ZA ZA966913A patent/ZA966913B/en unknown
- 1996-08-16 CA CA002228180A patent/CA2228180A1/en not_active Abandoned
- 1996-08-16 EP EP96927983A patent/EP0859675B1/en not_active Expired - Lifetime
- 1996-08-16 JP JP50921397A patent/JP3567225B2/en not_active Expired - Fee Related
- 1996-08-16 KR KR10-1998-0701042A patent/KR100443113B1/en not_active IP Right Cessation
- 1996-08-16 WO PCT/SE1996/001020 patent/WO1997006906A1/en active IP Right Grant
- 1996-08-16 AT AT96927983T patent/ATE201341T1/en active
- 1996-08-16 CZ CZ98441A patent/CZ44198A3/en unknown
- 1996-08-16 AU AU67605/96A patent/AU6760596A/en not_active Abandoned
- 1996-08-16 DE DE69612992T patent/DE69612992T2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11510739A (en) | 1999-09-21 |
| EP0859675A1 (en) | 1998-08-26 |
| KR100443113B1 (en) | 2004-09-18 |
| EP0859675B1 (en) | 2001-05-23 |
| SE9502867D0 (en) | 1995-08-16 |
| CZ44198A3 (en) | 1998-07-15 |
| SE9502867L (en) | 1997-02-17 |
| SE508311C2 (en) | 1998-09-21 |
| DE69612992D1 (en) | 2001-06-28 |
| ATE201341T1 (en) | 2001-06-15 |
| WO1997006906A1 (en) | 1997-02-27 |
| ZA966913B (en) | 1998-07-03 |
| JP3567225B2 (en) | 2004-09-22 |
| KR19990036374A (en) | 1999-05-25 |
| DE69612992T2 (en) | 2001-12-13 |
| AU6760596A (en) | 1997-03-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |