WO1999047297A1 - Arrangement of an immersed pouring nozzle in an ingot mould for continuous slab steel casting - Google Patents
Arrangement of an immersed pouring nozzle in an ingot mould for continuous slab steel casting Download PDFInfo
- Publication number
- WO1999047297A1 WO1999047297A1 PCT/DE1999/000402 DE9900402W WO9947297A1 WO 1999047297 A1 WO1999047297 A1 WO 1999047297A1 DE 9900402 W DE9900402 W DE 9900402W WO 9947297 A1 WO9947297 A1 WO 9947297A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mold
- immersion
- arrangement
- spout
- section
- 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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
Definitions
- the invention relates to an arrangement of a submerged nozzle in a mold for the continuous casting of metal slabs, in particular steel, according to the preamble of claim 1.
- a generic arrangement is known from AT 220768.
- the melt is passed through a submerged spout with a horizontal discharge opening to close to the melting level, the melt being introduced into the mold near the mold wall.
- the horizontal cross-section is the flow parallel to the longer line of symmetry or along the diagonal of this cross-section.
- a disadvantage of this arrangement is that the slag rising from the molten pool is entrained into the molten pool by the outflow in the melting mirror region, and the degree of purity thus deteriorates.
- the object of the invention is to provide an arrangement of an immersion nozzle in a mold for the continuous casting of slabs made of metal, in particular steel, which is particularly suitable for producing slabs with low-inclusion natural edges.
- the upper edge of the drain opening is at least 50 mm below the melting level
- the immersion spout being arranged in the center of the broad sides of the mold and the distance from the location of the outflow of the melt to the narrow side flowing in is at least 1/3 of the length of the broad side of the mold.
- the rolled strip is divided lengthwise in such a way that half meets the extreme requirements, for example the outer skin is sufficient for automobiles, beverage cans, etc. and the second half is fed into the channel for normal purposes. Trimming of the divided strip is not necessary, so that such a strip can be supplied with natural edges. With the same objective, the continuous casting slab can already be divided lengthways.
- the inflow conditions are particularly favorable when the distance from the location of the outflow of the melt to the narrow side flowing in is at least 1/3 the length of the broad side of the mold.
- the outflow preferably takes place in the central region of the broad side of the mold. If the immersion nozzle is positioned too close to the narrow side, the strand shell can be washed out too much and the temperature peaks of the mold wall are correspondingly high. At the same time, the flow on the opposite side can be reduced so much that there is a risk of the melt freezing.
- the drain opening may be inclined to the horizontal.
- the inclination can be in the direction of strand withdrawal or opposite. The inclination is in a range from> 0 degrees to max. 35
- Another possibility of arranging the immersion nozzle is characterized in that two immersion nozzles are used, the outlet openings of which are directed towards one another. With this arrangement, the inclusions are in the middle of the slab collected and can rise well there. In this arrangement, both edges have little inclusion, so that a longitudinal division can be dispensed with. Investigations have shown that the arrangement of two immersion spouts is particularly favorable if they are at a distance from the respective narrow side in the range from 1/8 to 1/4 based on the length of the broad side of the mold. So a certain
- Minimum flow is also guaranteed on the opposite side of the outflow, it is further developed to arrange small openings on this side in the immersion spout.
- the aim of producing a slab with a good oxidic degree of purity and low-inclusion natural edges can also be achieved by using an immersion spout with two approximately horizontally located drain openings in the middle of the mold.
- Such an arrangement is known for example from EP 0 512 1 18 B1 (FIG. 1).
- Long-term studies have shown, however, that the assumption that the same amount of melt would flow out of both outflow openings with the same outlet cross-section is not confirmed in practice.
- each drain opening is connected to a separate channel extending into the plunger nozzle.
- these preferably merge into the common inflow channel with a section which widens conically in the direction of flow.
- immersion pouring has the advantage that the melt flowing out of the narrow channels is better in terms of degree of purity compared to that flowing out of a common large channel.
- FIG. 1 shows a longitudinal section of a first arrangement of the invention
- Figure 2 shows a section in the direction A-A in Figure 1
- Figure 3 shows a longitudinal section of a second arrangement
- Figure 4 shows a longitudinal section through an inventive
- FIG. 1 and 2 show a first arrangement according to the invention of the immersion spout for producing slabs from metal as a basic drawing.
- This arrangement consists of a water-cooled mold 1, which has an approximately rectangular cross section in the horizontal cross section.
- An immersion nozzle 2 projects into this mold 1 in such a way that the lower region dips into the molten bath 4.
- the immersion spout 2 has, in a known manner, an approximately horizontal drain opening 5, which is directed towards a narrow side 6 of the mold 1.
- the dashed lines 7, 7 ' show in principle the formation of the outflow direction. This arrangement ensures that the narrow side 6 on the right here has more inclusions and practically no inclusions are deposited on the opposite narrow side 8 of the slab.
- the distance 21 of the immersion spout 2 from the narrow side 6 flowing against it is at least 1/3 of the length 22 of the broad side of the mold 1.
- the immersion spout 2 is preferably arranged in the middle of the broad side.
- FIG. 10 A second arrangement is shown in a longitudinal section in FIG. This shows a distributor 10 with two drain openings 1 1, 1 1 'and two immersion spouts 12, 12' attached to the distributor 10. These are arranged with respect to the mold 13 so that the
- Drain openings 14, 14 ' are directed towards each other so that the inclusions are pressed into the center of the mold 13 and can rise there.
- FIG. 4 shows, on an enlarged scale, the immersion spout 2 shown in sketch form in FIG. 1. It is made in a known manner from refractory material and consists of an inlet area, a middle part and an outlet area. To protect the immersion spout 2, a tulip-shaped insert 23 is arranged in the inlet area and is made of a special ceramic.
- the drain opening 5 is inclined at an angle of 15 ° downwards.
- the cross section of the drain opening 5 is, as can be seen next to it, essentially rectangular. The one swaying
- the area of the immersion spout 2 located at the melting level is subject to a particular load and is therefore more susceptible to wear than the other areas.
- a ring 24 is therefore arranged in this area and, like the insert 23, is made of a special ceramic.
- FIG. 5 shows in a longitudinal section an immersion spout 24 which has two drain openings 25, 26. Both drain openings 25, 26 have the same outlet cross section.
- the immersion nozzle 24 is made in a known manner from refractory material and has an inlet area, a middle part and an outlet area. In the inlet area, a tulip-like shape is provided to protect the immersion spout 24
- Insert 27 arranged, which is made of a special ceramic. Both drain openings 25, 26 are inclined somewhat in the direction of the strand discharge and are connected separately to a channel 28, 29 extending into the immersion spout 24. At the end of the extension, the separate channels 28, 29 merge into a section 30 which widens conically in the opposite direction to the flow and then forms the one-piece feed channel. This arrangement ensures that the same amount of melt flows out of both discharge openings 25, 26 and thus a symmetrical flow profile is established in the slab.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99910134A EP1062067A1 (en) | 1998-03-13 | 1999-02-09 | Arrangement of an immersed pouring nozzle in an ingot mould for continuous slab steel casting |
JP2000536517A JP2002506735A (en) | 1998-03-13 | 1999-02-09 | Arrangement of Immersion Nozzle in Mold for Continuous Casting of Slab |
KR1020007009820A KR20010041621A (en) | 1998-03-13 | 1999-02-09 | Arrangement of an immersed pouring nozzle in an ingot mould for continuous slab steel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19811957A DE19811957C2 (en) | 1998-03-13 | 1998-03-13 | Arrangement of a diving spout in a mold for the continuous casting of slabs |
DE19811957.7 | 1998-03-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999047297A1 true WO1999047297A1 (en) | 1999-09-23 |
Family
ID=7861452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/000402 WO1999047297A1 (en) | 1998-03-13 | 1999-02-09 | Arrangement of an immersed pouring nozzle in an ingot mould for continuous slab steel casting |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1062067A1 (en) |
JP (1) | JP2002506735A (en) |
KR (1) | KR20010041621A (en) |
DE (1) | DE19811957C2 (en) |
WO (1) | WO1999047297A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2680554C2 (en) * | 2013-11-07 | 2019-02-22 | Везувиус Крусибл Компани | Nozzle and casting installation |
CN108543943B (en) * | 2018-06-19 | 2024-03-08 | 沈阳麒飞新型材料科技有限公司 | Nozzle for producing thin-wall annular blank |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1244557A (en) * | 1958-10-30 | 1960-10-28 | Boehler & Co Ag Geb | Process for the adduction of molten metal, in particular in the continuous casting of bars of elongated cross-section |
FR2170149A1 (en) * | 1972-02-03 | 1973-09-14 | Voest Ag | |
FR2263052A1 (en) * | 1974-03-05 | 1975-10-03 | Kawasaki Steel Co | |
FR2263844A1 (en) * | 1974-03-11 | 1975-10-10 | Mannesmann Ag | |
JPH06126409A (en) * | 1992-10-22 | 1994-05-10 | Kawasaki Steel Corp | Method for supplying molten steel into slab continuous casting mold |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7206583U (en) * | 1972-08-31 | Voest Ag | Refractory pouring pipe for pouring molten metals | |
AT220768B (en) * | 1958-10-30 | 1962-04-10 | Boehler & Co Ag Geb | Process for the continuous casting of metals, in particular steel |
JPS5152330A (en) * | 1974-11-01 | 1976-05-08 | Kawasaki Steel Co | Yojukinzokuno chunyuhoho |
US5297614A (en) * | 1990-11-28 | 1994-03-29 | Kawasaki Steel Corporation | Process for continuous casting of ultra low carbon aluminum killed steel |
-
1998
- 1998-03-13 DE DE19811957A patent/DE19811957C2/en not_active Expired - Fee Related
-
1999
- 1999-02-09 KR KR1020007009820A patent/KR20010041621A/en not_active Application Discontinuation
- 1999-02-09 JP JP2000536517A patent/JP2002506735A/en active Pending
- 1999-02-09 EP EP99910134A patent/EP1062067A1/en not_active Withdrawn
- 1999-02-09 WO PCT/DE1999/000402 patent/WO1999047297A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1244557A (en) * | 1958-10-30 | 1960-10-28 | Boehler & Co Ag Geb | Process for the adduction of molten metal, in particular in the continuous casting of bars of elongated cross-section |
FR2170149A1 (en) * | 1972-02-03 | 1973-09-14 | Voest Ag | |
FR2263052A1 (en) * | 1974-03-05 | 1975-10-03 | Kawasaki Steel Co | |
FR2263844A1 (en) * | 1974-03-11 | 1975-10-10 | Mannesmann Ag | |
JPH06126409A (en) * | 1992-10-22 | 1994-05-10 | Kawasaki Steel Corp | Method for supplying molten steel into slab continuous casting mold |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 018, no. 418 (M - 1650) 5 August 1994 (1994-08-05) * |
Also Published As
Publication number | Publication date |
---|---|
JP2002506735A (en) | 2002-03-05 |
DE19811957C2 (en) | 2002-05-16 |
DE19811957A1 (en) | 1999-09-16 |
KR20010041621A (en) | 2001-05-25 |
EP1062067A1 (en) | 2000-12-27 |
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