EP0859675B1 - 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
- EP0859675B1 EP0859675B1 EP96927983A EP96927983A EP0859675B1 EP 0859675 B1 EP0859675 B1 EP 0859675B1 EP 96927983 A EP96927983 A EP 96927983A EP 96927983 A EP96927983 A EP 96927983A EP 0859675 B1 EP0859675 B1 EP 0859675B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- molten metal
- belt
- side walls
- endless belt
- casting
- 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.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 title claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 38
- 238000005266 casting Methods 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- 229910001338 liquidmetal Inorganic materials 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 2
- 239000010962 carbon steel Substances 0.000 abstract description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate 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
- B22D11/0631—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
Definitions
- This invention relates to a strip casting machine comprising a cooled and power driven endless belt with side dams, and an arrangement for supplying molten metal to the upper side of a flat and substantially horizontal part of the endless belt. It relates also to a method of casting a metal strip.
- edges When casting strips, there will usually be edge drops, that is the edges will be thinner, so that the edges must be cut away.
- the machine 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 dams 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 width of the belt so that they produce several separate jets that meet the belt 11 which moves as indicated 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 11.
- 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 container 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 11 is cooled by a large number of cooling nozzles 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.
- 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 dam is therefore not necessary.
- 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 11 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 machine 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 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 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 12, 13 form 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 horizontal 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.
- a cover is for example not shown.
- 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 thicknesses down to 6 mm or less and for strip widths of up to 2 metres or more.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Coating With Molten Metal (AREA)
- Treatment Of Steel In Its Molten State (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
This invention relates to a strip casting machine comprising a cooled and power driven
endless belt with side dams, and an arrangement for supplying molten metal to the upper side of
a flat and substantially horizontal part of the endless belt. It relates also to a method of
casting a metal strip.
A single belt strip casting machine of this 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.
The machine 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
dams 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
width of the belt so that they produce several separate jets that meet the belt 11 which
moves as indicated 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 11. 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
container 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 11 is cooled by a large number of cooling nozzles 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 dam is therefore not
necessary. 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 11 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 machine 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
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
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 12, 13 form 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 horizontal 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 fragmentary. 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 thicknesses down to 6 mm or less and for strip widths of up to 2
metres or more.
Claims (5)
- A strip casting machine comprising a cooled and power driven endless belt (11) with side walls (12,13), and an arrangement (16,14; 17,14) 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 so as to match the angle of wetting between the molten metal and the solid matter of the side walls and make the surface of the molten metal flat. - A machine according to claim 1, characterised in that the endless belt (11) has no rear wall and in that said arrangement (16,14; 17,14) comprises a distributor (14) arranged with a plurality of orifices for pouring molten metal onto the belt.
- A machine according to claim 2, characterised in that the distributor (14) is a tundish (14) arranged to be supplied with a controlled flow of molten metal from a ladle (16).
- 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 by pouring molten metal on the endless belt (11) in the space between the side walls (12,13) and choosing the angle of inclination of the side walls (12,13) to the horizontal to match the angle of wetting between the liquid metal and the solid matter of said side walls so that the surface of the molten metal will be flat.
- A method according to claim 4, characterised in that the molten metal is poured on to the belt (11) in the form of a plurality of free streams (30) which are so close to one another that the molten metal flows out to an even layer on the belt (11).
Applications Claiming Priority (3)
| 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 | 1995-08-16 | ||
| PCT/SE1996/001020 WO1997006906A1 (en) | 1995-08-16 | 1996-08-16 | A machine and a method for casting a metal strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0859675A1 EP0859675A1 (en) | 1998-08-26 |
| EP0859675B1 true EP0859675B1 (en) | 2001-05-23 |
Family
ID=20399208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96927983A Expired - Lifetime EP0859675B1 (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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101965239A (en) * | 2007-11-19 | 2011-02-02 | Sms西马格股份公司 | Casting system with a device for applying a casting strip |
| CN109248994A (en) * | 2017-08-19 | 2019-01-22 | 福建省长汀金龙稀土有限公司 | A kind of casting device of strip and the casting method of strip |
Families Citing this family (6)
| 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 |
| 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 |
| 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 DE DE69612992T patent/DE69612992T2/en not_active Expired - Lifetime
- 1996-08-16 EP EP96927983A patent/EP0859675B1/en not_active Expired - Lifetime
- 1996-08-16 AT AT96927983T patent/ATE201341T1/en active
- 1996-08-16 WO PCT/SE1996/001020 patent/WO1997006906A1/en active IP Right Grant
- 1996-08-16 AU AU67605/96A patent/AU6760596A/en not_active Abandoned
- 1996-08-16 CZ CZ98441A patent/CZ44198A3/en unknown
- 1996-08-16 KR KR10-1998-0701042A patent/KR100443113B1/en not_active IP Right Cessation
- 1996-08-16 JP JP50921397A patent/JP3567225B2/en not_active Expired - Fee Related
- 1996-08-16 CA CA002228180A patent/CA2228180A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101965239A (en) * | 2007-11-19 | 2011-02-02 | Sms西马格股份公司 | Casting system with a device for applying a casting strip |
| CN109248994A (en) * | 2017-08-19 | 2019-01-22 | 福建省长汀金龙稀土有限公司 | A kind of casting device of strip and the casting method of strip |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE201341T1 (en) | 2001-06-15 |
| KR19990036374A (en) | 1999-05-25 |
| AU6760596A (en) | 1997-03-12 |
| SE508311C2 (en) | 1998-09-21 |
| CA2228180A1 (en) | 1997-02-27 |
| DE69612992D1 (en) | 2001-06-28 |
| WO1997006906A1 (en) | 1997-02-27 |
| DE69612992T2 (en) | 2001-12-13 |
| SE9502867L (en) | 1997-02-17 |
| EP0859675A1 (en) | 1998-08-26 |
| KR100443113B1 (en) | 2004-09-18 |
| SE9502867D0 (en) | 1995-08-16 |
| CZ44198A3 (en) | 1998-07-15 |
| JPH11510739A (en) | 1999-09-21 |
| JP3567225B2 (en) | 2004-09-22 |
| ZA966913B (en) | 1998-07-03 |
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