EP0790873B1 - Tundish impact pad - Google Patents
Tundish impact pad Download PDFInfo
- Publication number
- EP0790873B1 EP0790873B1 EP95934731A EP95934731A EP0790873B1 EP 0790873 B1 EP0790873 B1 EP 0790873B1 EP 95934731 A EP95934731 A EP 95934731A EP 95934731 A EP95934731 A EP 95934731A EP 0790873 B1 EP0790873 B1 EP 0790873B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impact
- tundish
- sidewall
- pad
- opening
- 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
Images
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
- B22D41/003—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with impact pads
Definitions
- This invention relates to a tundish impact pad, i.e. a pad of erosion resistant material positioned on the floor of a tundish to receive the incoming stream of molten metal poured into the tundish from a ladle.
- U.S. patent 5169591 discloses an impact pad for a tundish for continuous casting of steel that comprises a base, a peripheral top surface and a discontinuous sidewall extending between the base and the peripheral top surface, the sidewall having an undercut inner surface, which may be curvilinear.
- U.S. patent 4776570 discloses a ladle stream breaker in the form of a closed box into which the ladle stream is directed via a pouring tube.
- the box has apertured walls through which the stream flows out of the box as a series of sub-streams each flowing perpendicularly to and impinging against a wall of a tundish.
- the invention provides a tundish impact pad comprising a body of refractory material capable of withstanding contact with molten steel in a tundish; the body comprising a base having an impact surface, an outer sidewall extending upwardly from the impact surface, a top surface connected to the sidewall, an opening being defined in the top surface, which opening provides open access for molten steel to and from the impact surface; the top surface having an inner annular portion substantially parallel to the impact surface, and the sidewall having a continuous interior face which is substantially perpendicular to the impact surface and wherein a substantially right angle corner is provided between the sidewall and the impact surface and a substantially right angle corner is provided between the sidewall and the top surface inner annular portion.
- Molten steel entering through the opening and contacting the impact surface flows outwardly then is turned inwardly by the sidewall interior face and then flows out of the opening.
- the sidewall is endless, i.e. it extends continuously around the impact surface.
- the opening is non-uniform in that it has a long dimension and a short dimension perpendicular to the long dimension.
- the opening may be, for example, rectangular or oval.
- the top outer surface of the pad may conveniently also be parallel to the impact surface.
- the impact pads of the present invention uniformly disperse the flow of incoming steel rather than merely redirecting it.
- the invention is particularly useful in providing improved residence time distribution parameters in the poured molten steel. It can also be of reduced cost due to its simplified internal chamber shapes and may be of reduced overall size relative to known impact pads.
- the impact pads according to the present invention are formed of a refractory composition which is capable of withstanding continuous contact with molten metal, in particular, molten steel such as used in continuous casting operations.
- molten metal in particular, molten steel
- a standard medium-to-high alumina monolithic refractory with an alumina content in the range of about 55 to 85% by weight is desirable.
- a basic refractory is preferred because of steel chemistry, it is preferred that a magnesia based monolithic refractory be utilised, with MgO in the range of about 58 to 93% by weight.
- the invention provides a tundish for holding a volume of molten steel and having a floor and side walls enclosing a region of impact and a drain, an impact pad of the present invention being provided on the floor of the tundish in the region of impact.
- the sidewall 28, with impact surface 24 and underside portion 42 of top surface 32 provides two sharp corners 28A and 28B respectively, which corners also extend continuously around the inside of the impact pad.
- the impact pad 20 be rectangular in shape, as illustrated in Figures 1 through 4, other non-uniform configurations can also be provided.
- an oval impact pad may be utilised, or another type of multi-sided polygon configuration, as long as there is an opening with a long dimension which is aligned with the long dimension of the tundish 10 and a short dimension aligned with the short dimension of the tundish 10.
Landscapes
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Laminated Bodies (AREA)
- Vehicle Step Arrangements And Article Storage (AREA)
- Cold Cathode And The Manufacture (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Silicon Polymers (AREA)
- Fluid-Damping Devices (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Details Of Garments (AREA)
- Ceramic Products (AREA)
Abstract
Description
Claims (9)
- A tundish impact pad (20) comprising a body of refractory material capable of withstanding contact with molten steel in a tundish (10), the body comprising a base (22) having an impact surface (24), an outer sidewall (26, 40) extending upwardly from the impact surface (24), a top surface (32) connected to the sidewall (26, 40), an opening (30) being defined in the top surface, which opening provides open access for molten steel to and from the impact surface (24), the top surface (32) having an inner annular portion (42) substantially parallel to the impact surface (24), and the sidewall (26, 40) having a continuous interior face (28) which is substantially perpendicular to the impact surface (24) and wherein a substantially right angle corner (28A) is provided between the sidewall (28) and the impact surface (24) and a substantially right angle corner (28B) is provided between the sidewall (28) and the top surface inner annular portion (42).
- A tundish impact pad according to Claim 1, wherein the opening (30) has a long dimension (30') and a short dimension (30'') perpendicular to the long dimension.
- A tundish impact pad according to Claim 2, wherein the opening (30) is rectangular or oval.
- A tundish impact pad according to Claim 1, 2, or 3, wherein the top outer surface (32) of the pad is parallel to the impact surface (24).
- A tundish impact pad according to any preceding claim, whereinthe sidewall (26.40) is endless.
- A tundish impact pad according to any preceding claim, wherein the pad (20) is a monolithic refractory having an alumina content of from 55% to 85% by weight.
- A tundish impact pad according to any one of Claims 1 to 5, wherein the pad (20) is a monolithic refractory comprising magnesia and containing from 58% to 93% by weight of magnesia.
- A tundish (10) for holding a volume of molten steel (16) and having a floor (15) and sidewalls (12) enclosing a region of impact and a drain (14), wherein the tundish (10) contains an impact pad (20) as claimed in any preceding claim on the floor (15) in the region of impact.
- A tundish according to Claim 8, wherein the impact pad (20) has an opening (30) to receive a stream of molten metal, the opening (30) having a long dimension (30') and a short dimension (30'') perpendicular to the long dimension (30') and the long dimension (30') of the opening (30) is aligned with the long dimension of the tundish.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US338123 | 1994-11-09 | ||
US08/338,123 US5518153A (en) | 1994-11-09 | 1994-11-09 | Tundish impact pad |
GB9508070 | 1995-04-20 | ||
GBGB9508070.1A GB9508070D0 (en) | 1995-04-20 | 1995-04-20 | Tundish impact pad |
PCT/GB1995/002505 WO1996014951A1 (en) | 1994-11-09 | 1995-10-24 | Tundish impact pad |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0790873A1 EP0790873A1 (en) | 1997-08-27 |
EP0790873B1 true EP0790873B1 (en) | 1998-06-03 |
Family
ID=26306906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95934731A Expired - Lifetime EP0790873B1 (en) | 1994-11-09 | 1995-10-24 | Tundish impact pad |
Country Status (14)
Country | Link |
---|---|
EP (1) | EP0790873B1 (en) |
JP (1) | JP4007429B2 (en) |
CN (1) | CN1069243C (en) |
AT (1) | ATE166814T1 (en) |
AU (1) | AU692622B2 (en) |
BR (1) | BR9509706A (en) |
CA (1) | CA2162551C (en) |
DE (1) | DE69502838T2 (en) |
DK (1) | DK0790873T3 (en) |
ES (1) | ES2104525T3 (en) |
FI (1) | FI110312B (en) |
TR (1) | TR199501393A2 (en) |
TW (1) | TW321615B (en) |
WO (1) | WO1996014951A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10143396C1 (en) * | 2001-09-04 | 2002-11-28 | Rhi Ag Wien | Baffle pot used for casting molten metal comprises a base and a peripheral wall which delimits a chamber and a feed opening for a molten metal lying opposite the base |
WO2004014585A1 (en) * | 2002-08-05 | 2004-02-19 | Refractory Intellectual Property Gmbh & Co. Kg | Fire resistant ceramic part |
DE10257395A1 (en) * | 2002-12-06 | 2004-06-24 | Weerulin Feuerfeste Produkte Gmbh & Co. Kg | Tundish fabricated of incombustible material has perforated steel cover protecting surrounding holding vessel from the impact of incoming molten metal |
DE102007035452A1 (en) | 2007-07-26 | 2009-01-29 | Pa-Ha-Ge Feuerfeste Erzeugnisse Gmbh & Co. Kg | impact absorber |
EP2193861A1 (en) | 2008-12-02 | 2010-06-09 | Foseco International Limited | Tundish Impact pad. |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2756761B1 (en) * | 1996-12-11 | 1999-01-08 | Ugine Savoie Sa | SUPPLY TANK INTENDED TO RETAIN MELTED METAL AND IN PARTICULAR STEEL |
GB9816458D0 (en) * | 1998-07-29 | 1998-09-23 | Foseco Int | Tundish impact pad |
GB9903937D0 (en) * | 1999-02-22 | 1999-04-14 | Foseco Int | Tundish impact pad |
GB9913241D0 (en) * | 1999-06-08 | 1999-08-04 | Foseco Int | Impact pad for tundish |
ES1048253Y (en) * | 2001-02-14 | 2002-05-01 | Refractaria S A | IMPACT BLOCK FOR CONTINUOUS COLADA. |
ZA200206261B (en) * | 2002-03-28 | 2003-04-07 | Foseco Int | Metallurgical impact pad. |
EP2537609A1 (en) * | 2011-06-23 | 2012-12-26 | Calderys Ukraine Ltd. | Metal-flow impact pad and diffuser for tundish |
JP5751078B2 (en) * | 2011-08-04 | 2015-07-22 | Jfeスチール株式会社 | Manufacturing method of high cleanliness steel slab by continuous casting |
CN103273027B (en) * | 2013-05-20 | 2015-08-12 | 江苏永钢集团有限公司 | A kind of Tundish rotational flow type turbulence controller |
EP2865464B1 (en) * | 2013-10-22 | 2016-03-16 | Refractory Intellectual Property GmbH & Co. KG | Fireproof ceramic impact pad |
CN110814330A (en) * | 2019-12-25 | 2020-02-21 | 武汉科技大学 | Top rotating type turbulence controller for continuous casting tundish |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4776570A (en) * | 1987-07-08 | 1988-10-11 | Sidbec Dosco Inc. | Ladle stream breaker |
US5169591A (en) * | 1992-02-07 | 1992-12-08 | Bethlehem Steel Corporation | Impact pad for a continuous caster tundish |
CN2204668Y (en) * | 1993-08-21 | 1995-08-09 | 鞍山钢铁学院 | Impact-proof cushion for ingot underpan |
US5358551A (en) * | 1993-11-16 | 1994-10-25 | Ccpi, Inc. | Turbulence inhibiting tundish and impact pad and method of using |
-
1995
- 1995-10-24 DK DK95934731T patent/DK0790873T3/en active
- 1995-10-24 BR BR9509706A patent/BR9509706A/en active IP Right Grant
- 1995-10-24 WO PCT/GB1995/002505 patent/WO1996014951A1/en active IP Right Grant
- 1995-10-24 ES ES95934731T patent/ES2104525T3/en not_active Expired - Lifetime
- 1995-10-24 AU AU37043/95A patent/AU692622B2/en not_active Expired
- 1995-10-24 EP EP95934731A patent/EP0790873B1/en not_active Expired - Lifetime
- 1995-10-24 JP JP51581096A patent/JP4007429B2/en not_active Expired - Lifetime
- 1995-10-24 AT AT95934731T patent/ATE166814T1/en active
- 1995-10-24 CN CN95197120A patent/CN1069243C/en not_active Expired - Lifetime
- 1995-10-24 DE DE69502838T patent/DE69502838T2/en not_active Expired - Lifetime
- 1995-11-08 TR TR95/01393A patent/TR199501393A2/en unknown
- 1995-11-09 CA CA002162551A patent/CA2162551C/en not_active Expired - Lifetime
- 1995-11-28 TW TW084112638A patent/TW321615B/zh not_active IP Right Cessation
-
1997
- 1997-05-07 FI FI971968A patent/FI110312B/en not_active IP Right Cessation
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10143396C1 (en) * | 2001-09-04 | 2002-11-28 | Rhi Ag Wien | Baffle pot used for casting molten metal comprises a base and a peripheral wall which delimits a chamber and a feed opening for a molten metal lying opposite the base |
WO2004014585A1 (en) * | 2002-08-05 | 2004-02-19 | Refractory Intellectual Property Gmbh & Co. Kg | Fire resistant ceramic part |
DE10235867B3 (en) * | 2002-08-05 | 2004-04-08 | Refractory Intellectual Property Gmbh & Co.Kg | Refractory ceramic component |
US7128247B2 (en) | 2002-08-05 | 2006-10-31 | Refractory Intellectual Property Gmbh & Co. Kg | Fire resistant ceramic part |
DE10257395A1 (en) * | 2002-12-06 | 2004-06-24 | Weerulin Feuerfeste Produkte Gmbh & Co. Kg | Tundish fabricated of incombustible material has perforated steel cover protecting surrounding holding vessel from the impact of incoming molten metal |
DE102007035452A1 (en) | 2007-07-26 | 2009-01-29 | Pa-Ha-Ge Feuerfeste Erzeugnisse Gmbh & Co. Kg | impact absorber |
DE102007035452B4 (en) * | 2007-07-26 | 2013-02-21 | Pa-Ha-Ge Feuerfeste Erzeugnisse Gmbh & Co. Kg | impact absorber |
EP2193861A1 (en) | 2008-12-02 | 2010-06-09 | Foseco International Limited | Tundish Impact pad. |
US8746516B2 (en) | 2008-12-02 | 2014-06-10 | Vesuvius Crucible Company | Tundish impact pad |
Also Published As
Publication number | Publication date |
---|---|
MX9703352A (en) | 1997-09-30 |
TW321615B (en) | 1997-12-01 |
JP4007429B2 (en) | 2007-11-14 |
DK0790873T3 (en) | 1999-02-15 |
DE69502838T2 (en) | 1999-03-18 |
JP2000505728A (en) | 2000-05-16 |
CA2162551A1 (en) | 1996-05-10 |
FI971968A (en) | 1997-05-07 |
AU692622B2 (en) | 1998-06-11 |
FI110312B (en) | 2002-12-31 |
CN1171752A (en) | 1998-01-28 |
AU3704395A (en) | 1996-06-06 |
BR9509706A (en) | 1997-10-28 |
CA2162551C (en) | 2000-08-01 |
ES2104525T3 (en) | 1998-09-16 |
CN1069243C (en) | 2001-08-08 |
WO1996014951A1 (en) | 1996-05-23 |
TR199501393A2 (en) | 1996-07-21 |
FI971968A0 (en) | 1997-05-07 |
DE69502838D1 (en) | 1998-07-09 |
ATE166814T1 (en) | 1998-06-15 |
ES2104525T1 (en) | 1997-10-16 |
EP0790873A1 (en) | 1997-08-27 |
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