CA2155483A1 - Continuous casting plant for casting thin slabs - Google Patents
Continuous casting plant for casting thin slabsInfo
- Publication number
- CA2155483A1 CA2155483A1 CA002155483A CA2155483A CA2155483A1 CA 2155483 A1 CA2155483 A1 CA 2155483A1 CA 002155483 A CA002155483 A CA 002155483A CA 2155483 A CA2155483 A CA 2155483A CA 2155483 A1 CA2155483 A1 CA 2155483A1
- Authority
- CA
- Canada
- Prior art keywords
- mold
- partial
- continuous casting
- core
- 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.)
- Abandoned
Links
- 238000005266 casting Methods 0.000 title claims abstract description 36
- 238000009749 continuous casting Methods 0.000 title claims abstract description 15
- 230000005291 magnetic effect Effects 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 3
- 239000012762 magnetic filler Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
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
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
Abstract
A continuous casting plant for casting thin slabs includes an electromagnetic decelerating unit for the molten steel which flows into the mold through a submerged casting pipe. The electromagnetic decelerating unit is composed of a coil with a ferromagnetic core arranged on each of the long sides of the mold and a yoke surrounding the mold. The cores on the long sides of the mold each are composed of a principal core and a partial core on the side of the cast strand, wherein different partial cores can be used as desired for adapting the magnetic field to changing casting conditions.
Description
.
2~5483 BACKGRO~ND OF THE lN V~N -llON
1. Field of the Invention The present invention relates to a continuous casting plant for casting thin slabs. The continuous casting plant includes an electromagnetic decelerating unit for the molten steel which flows into the mold through a submerged casting pipe. The electromagnetic decelerating unit is composed of a coil with a ferromagnetic core arranged on each of the long sides of the mold and a yoke surrounding the mold.
2. Description of the Related Art In a continuous casting plant of this type disclosed in EP-B1 04 01 504, cores of an electromagnetic decelerating unit are provided at the long sides of a slab mold, wherein the poles of the cores are arranged one above the other. The cores can be pivoted about a lower axis in order to influence the flux density of the magnetic field. This complicated arrangement makes it possible to influence the magnetic field only to a limited extent and with insufficient accuracy.
4 ~ 3 The present invention is based on the finding that different casting schedules, i.e., different casting speeds, casting ~;mP~,sions, steel qualities and casting conditions, result in different instable flow conditions within the mold and, thus, in deficiencies of the quality of the cast product.
2~5~83 , .
SUMMARY OF TEE lN v~NllON
Therefore, it is the primary object of the present invention to provide a continuous casting plant with a narrow mold space for casting thin slabs, in which a simple and inexpensive decelerating unit makes it possible to adjust the molten steel flowing from the submerged casting pipe at high speeds more accurately to the casting schedule and the resulting casting conditions.
In accordance with the present invention, the cores on the long sides of the mold each are composed of a principal core and a partial core on the side of the cast strand, wherein different partial cores can be used as desired ~or adapting the magnetic field to changing casting conditions.
By adjusting the magnetic ~ields to the respective casting schedule in accordance with the present invention, it is possible in the case of changing casting conditions to achieve a constant optimum flow distribution within the mold by effecting a defined deceleration of the casting speed. In particular, the present invention makes it possible to prevent washing-out of the strand shell, waves in the casting level, local thickness variations of the slag layer on the casting level which results in deficient lubrication, and a drawing-in of slag and casting powder into the 21~5~3 .
strand. This results as the overall effect in a significant improvement of the strand surface as well as of the structure of the cast thin slab.
In order to achieve a more accurate adaptation and adjustment of the magnetic field, partial cores having the following configurations can be used:
The partial cores have different lengths.
The partial cores have different heights.
The partial cores have portions of reduced cross-section.
Side portions of a partial core are offset with respect to height relative to a middle portion.
In accordance with another feature of the present invention, a mold frame has a recess for receiving the different partial cores of magnetic material, wherein the recess is arranged on the side of the casting strand in front of the principal core. Non-magnetic filler pieces are placed into any empty spaces remaining in the recess after partial cores of different dimensions have been placed in the recess.
2155~3 The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages, specific objects attained by its use, reference should be had to the drawing and descriptive matter in which there are illustrated and described preferred embodiments of the invention.
~15~483 BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
Fig. 1 is a cross-sectional view of a continuous casting mold for thin slabs with an electromagnetic decelerating unit;
Fig. 2 shows a vertical partial sectional view of the mold frame in the area of the recess for a partial core with cross-sectional views of different partial cores;
Fig. 3 is a horizontal partial cross-sectional view of a mold side with longitudinal sectional views of different par~ial cores;
and Fig. 4 is an elevational view of a partial core with side portions which are offset in casting direction relative to a middle portion.
~ 21~4~3 DESCRIPTION OF THE PREFERRED EMBODIMENTS
In the continuous casting mold for thin slabs illustrated in Fig. 1, a mold space 1 is formed by two cooled long side walls 2 and by narrow side walls 3. The long side walls 2 are fastened to a mold frame 4.
The supply of cooling water is effected from a lower cooling chamber 5 on each side of the mold, while the cooling water discharge is effected through an upper cooling chamber 6 on each side of the mold.
The molten steel is conducted into the mold through a submerged casting pipe 7 and the mold is filled up to the casting level 8 which is covered by casting powder. The submerged casting pipe 7 is provided with downwardly inclined lateral openings 9 from which the casting flows emerge.
An electromagnetic decelerating unit for the emerging casting flows is composed of a yoke 11 which surrounds the mold. A
principal core 11 extending over the width of the mold is attached on each side. Each principal core 11 is surrounded by a coil 12.
Recesses 13 are provided in the mold frame 4 at the end faces of 21~5~3 the principal cores. Partial cores 14a-m for influencing the magnetic field are optionally placed in the recesses 13.
Fig. 2 shows various partial cores 14a-g. The partial cores 14a-g differ from each other with respect to length, cross-sectional shape as well as with respect to their arrangement within the recess 13. Any empty spaces are filled out by non-magnetic filler pieces 15b-g.
Fig. 3 shows longitudinal views of partial cores 14h-1 extending over the width of the mold in front of a recess 13 in the mold frame 4 shown in horizontal section. For influencing the magnetic field, the partial cores 14h-l have longitudinal portions of reduced cross-section, wherein hollow spaces are filled out by filler pieces 15i-1 of non-magnetic material. The lengths of the partial cores may also vary.
Fig. 4 shows a front view of a partial core 14m, wherein side portions X are offset relative to the middle portion Y in the casting direction indicated by arrow 16. In this m~nner, an adaptation in the direction of downwardly inclined casting flows is effected.
2 1 ~ 3 4 8 3 , .
The present invention is not limited to the illustrated embodiment of a thin slab mold with a funnel-shaped upper casting area; rather, the present invention can also be used in molds having long side walls which extend parallel to each other or which are arched from the top toward the outlet opening of the mold.
While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
1. Field of the Invention The present invention relates to a continuous casting plant for casting thin slabs. The continuous casting plant includes an electromagnetic decelerating unit for the molten steel which flows into the mold through a submerged casting pipe. The electromagnetic decelerating unit is composed of a coil with a ferromagnetic core arranged on each of the long sides of the mold and a yoke surrounding the mold.
2. Description of the Related Art In a continuous casting plant of this type disclosed in EP-B1 04 01 504, cores of an electromagnetic decelerating unit are provided at the long sides of a slab mold, wherein the poles of the cores are arranged one above the other. The cores can be pivoted about a lower axis in order to influence the flux density of the magnetic field. This complicated arrangement makes it possible to influence the magnetic field only to a limited extent and with insufficient accuracy.
4 ~ 3 The present invention is based on the finding that different casting schedules, i.e., different casting speeds, casting ~;mP~,sions, steel qualities and casting conditions, result in different instable flow conditions within the mold and, thus, in deficiencies of the quality of the cast product.
2~5~83 , .
SUMMARY OF TEE lN v~NllON
Therefore, it is the primary object of the present invention to provide a continuous casting plant with a narrow mold space for casting thin slabs, in which a simple and inexpensive decelerating unit makes it possible to adjust the molten steel flowing from the submerged casting pipe at high speeds more accurately to the casting schedule and the resulting casting conditions.
In accordance with the present invention, the cores on the long sides of the mold each are composed of a principal core and a partial core on the side of the cast strand, wherein different partial cores can be used as desired ~or adapting the magnetic field to changing casting conditions.
By adjusting the magnetic ~ields to the respective casting schedule in accordance with the present invention, it is possible in the case of changing casting conditions to achieve a constant optimum flow distribution within the mold by effecting a defined deceleration of the casting speed. In particular, the present invention makes it possible to prevent washing-out of the strand shell, waves in the casting level, local thickness variations of the slag layer on the casting level which results in deficient lubrication, and a drawing-in of slag and casting powder into the 21~5~3 .
strand. This results as the overall effect in a significant improvement of the strand surface as well as of the structure of the cast thin slab.
In order to achieve a more accurate adaptation and adjustment of the magnetic field, partial cores having the following configurations can be used:
The partial cores have different lengths.
The partial cores have different heights.
The partial cores have portions of reduced cross-section.
Side portions of a partial core are offset with respect to height relative to a middle portion.
In accordance with another feature of the present invention, a mold frame has a recess for receiving the different partial cores of magnetic material, wherein the recess is arranged on the side of the casting strand in front of the principal core. Non-magnetic filler pieces are placed into any empty spaces remaining in the recess after partial cores of different dimensions have been placed in the recess.
2155~3 The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages, specific objects attained by its use, reference should be had to the drawing and descriptive matter in which there are illustrated and described preferred embodiments of the invention.
~15~483 BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
Fig. 1 is a cross-sectional view of a continuous casting mold for thin slabs with an electromagnetic decelerating unit;
Fig. 2 shows a vertical partial sectional view of the mold frame in the area of the recess for a partial core with cross-sectional views of different partial cores;
Fig. 3 is a horizontal partial cross-sectional view of a mold side with longitudinal sectional views of different par~ial cores;
and Fig. 4 is an elevational view of a partial core with side portions which are offset in casting direction relative to a middle portion.
~ 21~4~3 DESCRIPTION OF THE PREFERRED EMBODIMENTS
In the continuous casting mold for thin slabs illustrated in Fig. 1, a mold space 1 is formed by two cooled long side walls 2 and by narrow side walls 3. The long side walls 2 are fastened to a mold frame 4.
The supply of cooling water is effected from a lower cooling chamber 5 on each side of the mold, while the cooling water discharge is effected through an upper cooling chamber 6 on each side of the mold.
The molten steel is conducted into the mold through a submerged casting pipe 7 and the mold is filled up to the casting level 8 which is covered by casting powder. The submerged casting pipe 7 is provided with downwardly inclined lateral openings 9 from which the casting flows emerge.
An electromagnetic decelerating unit for the emerging casting flows is composed of a yoke 11 which surrounds the mold. A
principal core 11 extending over the width of the mold is attached on each side. Each principal core 11 is surrounded by a coil 12.
Recesses 13 are provided in the mold frame 4 at the end faces of 21~5~3 the principal cores. Partial cores 14a-m for influencing the magnetic field are optionally placed in the recesses 13.
Fig. 2 shows various partial cores 14a-g. The partial cores 14a-g differ from each other with respect to length, cross-sectional shape as well as with respect to their arrangement within the recess 13. Any empty spaces are filled out by non-magnetic filler pieces 15b-g.
Fig. 3 shows longitudinal views of partial cores 14h-1 extending over the width of the mold in front of a recess 13 in the mold frame 4 shown in horizontal section. For influencing the magnetic field, the partial cores 14h-l have longitudinal portions of reduced cross-section, wherein hollow spaces are filled out by filler pieces 15i-1 of non-magnetic material. The lengths of the partial cores may also vary.
Fig. 4 shows a front view of a partial core 14m, wherein side portions X are offset relative to the middle portion Y in the casting direction indicated by arrow 16. In this m~nner, an adaptation in the direction of downwardly inclined casting flows is effected.
2 1 ~ 3 4 8 3 , .
The present invention is not limited to the illustrated embodiment of a thin slab mold with a funnel-shaped upper casting area; rather, the present invention can also be used in molds having long side walls which extend parallel to each other or which are arched from the top toward the outlet opening of the mold.
While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
Claims (6)
1. A continuous casting plant for casting thin slabs, the continuous casting plant comprising a mold having long sides and narrow sides, the long sides and narrow sides defining a mold space, a casting pipe extending into the mold space, an electromagnetic decelerating unit for producing a magnetic field for decelerating molten steel which flows into the mold space through the casting pipe, the electromagnetic decelerating unit comprising a coil with a ferromagnetic core arranged on each of the long sides of the mold and a yoke surrounding the mold, each core comprising a principal core and a partial core facing the mold space, wherein the partial cores are exchangeable for adapting the magnetic field to changing casting conditions.
2. The continuous casting plant according to claim 1, wherein the exchangeable partial cores have different lengths.
3. The continuous casting plant according to claim 1, wherein the exchangeable partial cores have different heights.
4. The continuous casting plant according to claim 1, wherein the exchangeable partial cores have lengths, and wherein the partial cores have portions of reduced cross-section over the lengths thereof.
5. The continuous casting plant according to claim 1, wherein an exchangeable partial core has a length and a height, the partial core having a middle portion and side portions adjacent the middle portion, wherein the height of the middle portion is offset relative to the height of the side portions.
6. The continuous casting plant according to claim 1, wherein the mold further comprises a mold frame, the mold frame having recesses for receiving the exchangeable partial cores, the recesses being arranged on the long sides of the mold and facing the mold space, further comprising non-magnetic filler pieces for placement in spaces of the recesses not occupied by partial cores.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4429685A DE4429685A1 (en) | 1994-08-22 | 1994-08-22 | Continuous caster for casting thin slabs |
| DEP4429685.1 | 1994-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2155483A1 true CA2155483A1 (en) | 1996-02-23 |
Family
ID=6526242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002155483A Abandoned CA2155483A1 (en) | 1994-08-22 | 1995-08-04 | Continuous casting plant for casting thin slabs |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5613548A (en) |
| EP (1) | EP0698434B1 (en) |
| JP (1) | JPH0866747A (en) |
| KR (1) | KR960007058A (en) |
| CN (1) | CN1122736A (en) |
| AT (1) | ATE186666T1 (en) |
| CA (1) | CA2155483A1 (en) |
| DE (2) | DE4429685A1 (en) |
| ES (1) | ES2140592T3 (en) |
| FI (1) | FI109101B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69701857T2 (en) * | 1996-02-13 | 2000-12-07 | Abb Ab Vaesteraas | DEVICE FOR POURING INTO A MOLD |
| DE19625932A1 (en) * | 1996-06-28 | 1998-01-08 | Schloemann Siemag Ag | Electromagnetic brake for a continuous casting mold |
| CA2242037C (en) * | 1997-07-01 | 2004-01-27 | Ipsco Inc. | Controllable variable magnetic field apparatus for flow control of molten steel in a casting mold |
| US6341642B1 (en) | 1997-07-01 | 2002-01-29 | Ipsco Enterprises Inc. | Controllable variable magnetic field apparatus for flow control of molten steel in a casting mold |
| SE9703170D0 (en) * | 1997-09-03 | 1997-09-03 | Asea Brown Boveri | Method and apparatus for controlling the metal flow in an injection molding mold by applying electromagnetic fields at a plurality of levels |
| SE516635C2 (en) | 2000-06-21 | 2002-02-05 | Abb Ab | Device for extrusion of metal material |
| SE0101018L (en) * | 2001-03-21 | 2002-09-22 | Abb Ab | Device for continuous casting of metal |
| DE10237188A1 (en) * | 2002-08-14 | 2004-02-26 | Sms Demag Ag | Electromagnetic braking device for steel melts flowing into a continuous casting mold, comprises a magnetic coil having a core consisting of a main part receiving a magnetic coil and travelling toward the wide side walls of a mold |
| JP4073837B2 (en) * | 2003-08-01 | 2008-04-09 | 新日本製鐵株式会社 | Continuous casting mold and method for removing continuous casting mold |
| AT513066B1 (en) * | 2012-07-05 | 2016-06-15 | Primetals Technologies Austria GmbH | Electromagnetic influencing device for a strand in a continuous casting machine |
| DE102014105870A1 (en) | 2014-04-25 | 2015-10-29 | Thyssenkrupp Ag | Process and apparatus for thin slab continuous casting |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1221724B (en) * | 1987-11-24 | 1990-07-12 | Danieli Off Mecc | MAGNETIC FIELD ENHANCER DEVICE IN THE LINGOTTEERA |
| KR930002836B1 (en) | 1989-04-27 | 1993-04-10 | 가와사끼 세이데쓰 가부시까가이샤 | Method and apparatus for continuous casting |
| SE500745C2 (en) * | 1991-01-21 | 1994-08-22 | Asea Brown Boveri | Methods and apparatus for casting in mold |
| JPH05123841A (en) * | 1991-10-30 | 1993-05-21 | Nippon Steel Corp | Electromagnetic brake device for continuous casting mold |
| SE501322C2 (en) * | 1993-01-19 | 1995-01-16 | Asea Brown Boveri | Device for injection molding in mold |
-
1994
- 1994-08-22 DE DE4429685A patent/DE4429685A1/en not_active Withdrawn
-
1995
- 1995-08-04 CA CA002155483A patent/CA2155483A1/en not_active Abandoned
- 1995-08-08 EP EP95112424A patent/EP0698434B1/en not_active Expired - Lifetime
- 1995-08-08 AT AT95112424T patent/ATE186666T1/en not_active IP Right Cessation
- 1995-08-08 DE DE59507236T patent/DE59507236D1/en not_active Expired - Fee Related
- 1995-08-08 ES ES95112424T patent/ES2140592T3/en not_active Expired - Lifetime
- 1995-08-17 KR KR1019950025257A patent/KR960007058A/en active IP Right Grant
- 1995-08-17 FI FI953881A patent/FI109101B/en active
- 1995-08-18 CN CN95109815A patent/CN1122736A/en active Pending
- 1995-08-21 JP JP7211900A patent/JPH0866747A/en active Pending
- 1995-08-22 US US08/517,881 patent/US5613548A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FI953881A0 (en) | 1995-08-17 |
| US5613548A (en) | 1997-03-25 |
| DE59507236D1 (en) | 1999-12-23 |
| KR960007058A (en) | 1996-03-22 |
| DE4429685A1 (en) | 1996-02-29 |
| FI953881A (en) | 1996-02-23 |
| CN1122736A (en) | 1996-05-22 |
| JPH0866747A (en) | 1996-03-12 |
| EP0698434A1 (en) | 1996-02-28 |
| EP0698434B1 (en) | 1999-11-17 |
| ES2140592T3 (en) | 2000-03-01 |
| ATE186666T1 (en) | 1999-12-15 |
| FI109101B (en) | 2002-05-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |