USRE35685E - Impact pad for a continuous caster tundish - Google Patents

Impact pad for a continuous caster tundish Download PDF

Info

Publication number
USRE35685E
USRE35685E US08/347,975 US34797594A USRE35685E US RE35685 E USRE35685 E US RE35685E US 34797594 A US34797594 A US 34797594A US RE35685 E USRE35685 E US RE35685E
Authority
US
United States
Prior art keywords
base
sidewall
undercut
top surface
extending
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
Application number
US08/347,975
Inventor
Manfred Schmidt
Scott B. Newman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cleveland Cliffs Steel Technologies Inc
Original Assignee
Bethlehem Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25261886&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=USRE35685(E) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bethlehem Steel Corp filed Critical Bethlehem Steel Corp
Priority to US08/347,975 priority Critical patent/USRE35685E/en
Application granted granted Critical
Publication of USRE35685E publication Critical patent/USRE35685E/en
Assigned to ISG TECHNOLOGIES, INC. reassignment ISG TECHNOLOGIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BETHLEHEM STEEL CORPORATION
Assigned to CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT, THE reassignment CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT, THE PLEDGE AND SECURITY AGREEMENT Assignors: INTERNATIONAL STEEL GROUP, INC.
Assigned to ISG CLEVELAND WEST, INC., ISG PLATE INC., ISG VENTURE, INC., ISG BURNS HARBOR INC., ISG RIVERDALE INC., ISG ACQUISITION INC., ISG WARREN INC., ISG TECHNOLOGIES, INC., ISG INDIANA HARBOR INC., ISG CLEVELAND INC., ISG RAILWAYS, INC., ISG CLEVELAND WEST PROPERTIES, INC., INTERNATIONAL STEEL GROUP, INC., ISG PIEDMONT INC., ISG SOUTH CHICAGO & INDIANA HARBOR RAILWAY COMPANY, ISG SALES, INC., ISG CLEVELAND WORKS RAILWAY COMPANY, ISG HIBBING, INC., BETHLEHEM HIBBING CORPORATION, ISG HENNEPIN, INC., ISG/EGL HOLDING COMPANY, ISG STEELTON INC., ISG LACKAWANNA INC., ISG SPARROWS POINT INC. reassignment ISG CLEVELAND WEST, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/003Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with impact pads

Definitions

  • This invention is directed to apparatus for reducing surface turbulence in a molten metal bath, and more particularly, to impact pads for controlling the fluid flow pattern of an incoming ladle stream for the purpose of reducing surface turbulence within a continuous caster tundish.
  • Tundishes located between the ladle delivering liquid steel to the caster floor and the continuous caster mold, are large containers for holding a reservoir of liquid steel.
  • the liquid steel is transferred from the ladle through a ladle shroud extending into the tundish, and the liquid steel is fed at a continuous or semicontinuous flow rate controlled by a stopper rod, or by a slide gate assembly.
  • the ladle stream fluid flow surges upward, along such barriers, and causes excessive turbulence at the surface of the liquid steel bath.
  • the excessive turbulence produced by the upward surge breaks up the tundish flux cover, and produces a downward surge around the ladle shroud.
  • the broken flux cover allows the liquid steel to be exposed to the atmosphere which sets up conditions conducive to altering the chemistry of the steel bath.
  • the chemical changes typically involve loss of aluminum from the bath and/or absorption of oxygen and nitrogen into the steel.
  • the downward, shear flow of the liquid steel swirling around the ladle shroud entraps particles from the broken slag cover within the ladle stream.
  • an impact pad having a base for receiving an incoming ladle stream, and one or more sidewalls extending in an upward direction along the periphery of the base.
  • Each upward extending sidewall includes an inner surface having an undercut portion facing the incoming ladle stream.
  • Each undercut portion extends along the length of the inner surface, and each undercut portion comprises a shaped surface for receiving and reversing the direction of a fluid flow generated by the incoming ladle stream.
  • FIG. 1 is a longitudinal cross-section view of a water flow-model study tundish having an asymmetrical fluid flow pattern.
  • FIG. 2 is a transverse cross-section view taken along the lines 2--2 of FIG. 1.
  • FIG. 3a is a plan view showing the preferred embodiment of the impact pad invention for use in a tundish having an asymmetrical ladle stream fluid flow pattern.
  • FIG. 3b is a front perspective view taken along the line 3b--3b of FIG. 3a.
  • FIG. 4 is a longitudinal cross-section view through a single strand caster tundish showing the preferred embodiment of the impact pad invention.
  • FIG. 5 is a longitudinal cross-section view through a multiple strand "T" shaped tundish showing the preferred embodiment of the impact pad invention.
  • FIG. 6a is a plan view showing an alternate embodiment of the impact pad invention for use in a tundish having an asymmetrical fluid flow pattern.
  • FIG. 6b is a perspective view taken along the line 6b--6b of FIG. 6a.
  • FIG. 7 is a longitudinal cross-section view through the end wall portion of a tundish showing the alternate embodiment of the impact pad invention for use in a tundish having an asymmetrical fluid flow pattern.
  • FIG. 8 is a longitudinal cross-section view through the end wall portion of a tundish showing a second alternate embodiment of the impact pad invention for use in a tundish having an asymmetrical fluid flow pattern.
  • FIG. 9 is a front perspective view showing the preferred embodiment of the impact pad invention for use in a tundish having a symmetrical ladle stream fluid flow pattern.
  • FIG. 10 is a longitudinal cross-section view through a multiple strand caster tundish showing the preferred impact pad invention for use with a symmetrical fluid flow pattern.
  • FIG. 11 is a transverse cross-section view taken along the lines 11--11 of FIG. 10.
  • the overall geometry of a continuous caster tundish is dictated by the location and number of strands within the casting machine.
  • a rectangular, or a "Bathtub" shaped tundish is customarily used with a single strand caster, and a trough shaped tundish is generally used for a multiple strand caster.
  • the location of the well blocks, and the tundish impact pad is also determined by the casting machine design.
  • a tundish 11a for a single strand caster having a well block 12 at one end of the tundish, and an impact pad 13 positioned adjacent to the end wall 3 at the end opposite the well block.
  • This tundish arrangement produces an asymmetrical fluid flow 9a within the reservoir of liquid steel 5.
  • FIGS. 10 and 11 illustrate a tundish 11c for a multiple strand caster.
  • the tundish well blocks 12 are spaced apart along the length of the tundish floor 4, and the tundish impact pad 16 is located between adjacent well blocks 12. This tundish arrangement produces a symmetrical fluid flow shown at 9b.
  • a variation of the multiple strand tundish comprises a "T" shaped reservoir shown as 11b in FIG. 5.
  • Tundish 11b is comprised of two trough shaped reservoirs arranged perpendicular to each other. One end of the first trough shaped reservoir A, interects the second reservoir B. The opposite end portion of reservoir A includes an impact pad 13 adjacent end wall 3.
  • the incoming ladle stream generates an asymmetrical fluid flow 9a, similar to the fluid flow shown in FIG. 4.
  • FIG. 1 illustrates a single strand tundish 11a having an asymmetrical fluid flow 9a.
  • the ladle shroud 7 is shown adjacent end wall 3 opposite the well block 12. End wall 3 obstructs the fluid flow 9a, and the restricted forces cause an upward fluid flow surge along end wall 3.
  • This upward flow follows a circular path 9c, and comprises an upward surge along the face of wall 3, and a downward flow around the ladle shroud 7.
  • the upward surge of circular flow 9c causes excessive turbulence at the surface of the bath, breaks up a protective flux or slag cover 6, and exposes the liquid steel to the outside atmosphere, thereby creating conditions for possible uncontrolled chemical changes within the liquid steel bath.
  • the downward flow around the ladle shroud generates shear and vortices and pulls broken particles 10, from the flux cover 6, down into the liquid steel bath, creating inclusions within the finished steel product.
  • an impact pad 13 for use in a tundish having an asymmetrical fluid flow 9a, is shown located adjacent the end wall 3 of a tundish and positioned below the ladle shroud 7.
  • the impact pad which is a refractory shape, includes a base 17 having an erosion resistant top surface for receiving the incoming ladle stream 8.
  • Impact pad 13 further includes a sidewall 18 extending in an upward direction along the periphery of base 17. Sidewall 18 partially encircles the incoming ladle stream 8 providing an open side 23 along one edge of the impact pad adjacent well blocks 12.
  • Sidewall 18 includes an inclined outer surface 19 contiguous with the tundish walls, a top surface 20 having a semi-circular or "C" shaped, serpentine edge partially encircling the ladle stream 8, and an inner surface 21 facing the incoming ladle stream.
  • Sidewall 18 further includes a curvilinear undercut portion 22 having a shaped surface capable of reversing the direction of the fluid flow 9a.
  • Undercut 22 extends along the length of the inner surface 21 below top surface 20, and undercut 22 has one end tangent to top surface 17' of base 17.
  • the height "H" of the curvilinear undercut is ⁇ the inside diameter of the shroud delivering the liquid steel into the tundish.
  • the incoming ladle stream 8 falls onto the base top surface 17', generates a radial asymmetrical fluid flow 9a, and emanates toward the impact pad sidewall 18.
  • the reversed fluid flow forms an eddy current 9d, which is gradually disbursed along the open side 23, toward the well blocks 12 at the opposite end of the tundish.
  • FIGS. 6a, 6b and 7, disclose an alternate impact pad embodiment for use in a tundish having an asymmetrical fluid flow 9a.
  • the alternate impact pad 14 is shown adjacent a tundish end wall 3, and positioned below the ladle shroud 7 to receive the incoming ladle stream 8.
  • the alternate impact pad embodiment comprises a refractory shape having a base 24, and a sidewall 25 extending in an upward direction along the periphery of base 24. Sidewall 25 partially encircles the incoming ladle stream 8 to provide an open side 26 along the edge of the impact pad adjacent well blocks 12.
  • the impact pad sidewall 25 includes an inclined outer surface 27 contiguous with the tundish walls, a top surface 28 having a "C" shaped, serpentine edge partially encircling the ladle stream 8, and an inner surface 29 facing the incoming ladle stream.
  • the inner surface 29, of sidewall 25, is sloped at an angle ⁇ in a downward direction from the serpentine edge, of top surface 28, toward the inclined outer surface 27 to provide a planar undercut 30.
  • Angle ⁇ is between 45° and 75°, and the planar undercut portion 30 extends along the length of the inner surface 29 below top surface 28.
  • the height "H" of the planar undercut is ⁇ the inside diameter of the shroud delivering the liquid steel into the tundish.
  • the reversed fluid flow forms an eddy current 9d, which is gradually disbursed along the open side 26, toward the well blocks 12 at the opposite end of the tundish.
  • Impact pad 15 is positioned adjacent tundish end wall 3 and below ladle shroud 7 to receive the incoming ladle stream 8.
  • Impact pad 15 comprises a base having a top surface 31 sloped in a downward direction from the tundish end wall 3 toward the tundish floor 4.
  • Impact pad 15 further includes a pad sidewall 32 extending in an upward direction along the periphery of the base. Sidewall 32 partially encircles the incoming ladle stream 8, and includes an inner surface having a planar undercut surface 33 similar to undercut 30, sloped in a downward direction at angle ⁇ between 45° and 75°.
  • FIGS. 9-11 illustrate the preferred embodiment of the impact pad invention for use in a continuous casting tundish having a symmetrical ladle stream fluid flow 9b.
  • Impact pad 16 comprises a base 34 having an erosion resistant top surface 34', sidewalls 35 and 36 extending along opposite edges of base 34, and two open ends 41 located between the opposed pad sidewalls 35 and 36.
  • Pad sidewalls 35 and 36 extend in an upward direction from their respective opposite base edge portions, and each pad sidewall, 35 and 36, includes an inclined outer surface 37 contiguous with a tundish wail, a top surface 38, and an inner surface 39 facing the incoming ladle stream.
  • Each pad sidewall 35 and 36 further includes a curvilinear undercut portion 40 having a shaped surface capable of reversing the direction of the fluid flow 9d generated by the incoming ladle stream 8.
  • Each undercut 40 extends along the length of inner surface 39 below top surface 38, and each undercut 40 has one end tangent to top surface 34' of base 34.
  • the inclined outer surface 37 of sidewalls 35 and 36 are positioned adjacent the tundish sidewalls 2.
  • the incoming ladle stream 8 falls onto the base top surface 34', generates a radial symmetrical fluid flow, and emanates toward the impact pad sidewalls 35 and 36.
  • the curvilinear undercut 40 extending along each inside surface 39 of sidewalls 35 and 36, captures the fluid flow within their shaped surface, and forces the fluid flow into a reversed direction back toward the incoming ladle stream.
  • the reversed fluid flow forms eddy currents 9d, which are gradually disbursed along the open ends 41, toward the well blocks 12 spaced apart along the length of the tundish floor.
  • impact pad 16 has been shown to comprise a curvilinear undercut 40, it should be understood that the undercut portion could just as well comprise a sloped planar undercut as disclosed in FIGS. 6a-8.
  • FIG. 10 shows only two well blocks, it should be understood that a casting machine for casting more than two continuous strands would require more than two well blocks spaced apart along the length of the tundish floor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

An impact pad for eliminating surface turbulence in a continuous caster tundish, the impact pad having a base for receiving an incoming ladle stream, and one or more sidewalls extending in an upward direction along the periphery of the base. Each upward extending sidewall includes an inner surface having an undercut portion facing the incoming ladle stream. And, each undercut portion extends along the length of the inner surface, and comprises a shaped surface for receiving and reversing the direction of a fluid flow generated by the incoming ladle stream.

Description

BACKGROUND OF THE INVENTION
This invention is directed to apparatus for reducing surface turbulence in a molten metal bath, and more particularly, to impact pads for controlling the fluid flow pattern of an incoming ladle stream for the purpose of reducing surface turbulence within a continuous caster tundish.
Tundishes, located between the ladle delivering liquid steel to the caster floor and the continuous caster mold, are large containers for holding a reservoir of liquid steel. The liquid steel is transferred from the ladle through a ladle shroud extending into the tundish, and the liquid steel is fed at a continuous or semicontinuous flow rate controlled by a stopper rod, or by a slide gate assembly.
Extensive water flow-model studies have been made throughout the steelmaking industry to simulate liquid steel fluid flow patterns within an actual tundish. These water flow-models have been beneficial in determining critical areas of tundish design such as depth of bath, well block locations, and placement of fluid flow control devices within the tundish. As a result of these studies, it is well-known that the fluid flow generated by the incoming ladle stream is reflected from the flat tundish floor toward the surface of the liquid steel. This generated fluid flow, causes a turbulent boiling action and extensive wave motion at the surface of the steel bath. Additionally, where the fluid flow forces are obstructed by structural barriers such as tundish side and end walls, the ladle stream fluid flow surges upward, along such barriers, and causes excessive turbulence at the surface of the liquid steel bath. The excessive turbulence produced by the upward surge breaks up the tundish flux cover, and produces a downward surge around the ladle shroud. The broken flux cover allows the liquid steel to be exposed to the atmosphere which sets up conditions conducive to altering the chemistry of the steel bath. The chemical changes typically involve loss of aluminum from the bath and/or absorption of oxygen and nitrogen into the steel. The downward, shear flow of the liquid steel swirling around the ladle shroud, entraps particles from the broken slag cover within the ladle stream.
Surface requirements, and cleanliness standards for modern high quality steel products, dictate that impurities and chemical changes can not be tolerated within the product. Heretofore, there have been various attempts to reduce or eliminate surface turbulence within a continuous caster tundish to improve the quality of the finished steel product. These attempts have included a wide assortment of dams and weirs which redirect the ladle stream fluid flow away from the surface of the bath. One such attempt, comprising wall dams extending along the tundish sidewalls near the surface of the liquid steel bath, is disclosed in Applicant's prior U.S. Pat. No. 4,715,586 granted Dec. 29, 1987. Although many past fluid flow control devices have been somewhat successful in controlling fluid flow and reducing surface turbulence, they tend to cause operational problems. Caster operators have found that wall dams are difficult and expensive to install and maintain. The operators have also discovered, that because of their location within the tundish, and because of their high profiles, the past flow control devices interfere with tundish deskulling apparatus, and are damaged, or destroyed during the deskulling operations.
SUMMARY OF THE INVENTION
It is therefore an object of this invention to provide a fluid flow control device for reducing surface turbulence in the vicinity of the ladle shroud in a continuous caster tundish.
It is a further object of this invention to provide a fluid flow control device to prevent breakup of the tundish flux cover, and reoxidation of the liquid steel bath.
It is a further object of this invention to provide a fluid flow control device to prevent slag entrainment within the liquid steel bath.
It is a further object of this invention to provide a fluid flow control device for receiving and reversing the direction of the radiating fluid flow generated by an incoming ladle stream.
It is a further object of this invention to provide a fluid flow control device which is easily installed in the flat bottom portion of a continuous caster tundish.
It is still a further object of this invention to provide a fluid flow control device which can be easily replaced during refurbishing of the tundish.
We have discovered that the foregoing objects can be attained with an impact pad having a base for receiving an incoming ladle stream, and one or more sidewalls extending in an upward direction along the periphery of the base. Each upward extending sidewall includes an inner surface having an undercut portion facing the incoming ladle stream. Each undercut portion extends along the length of the inner surface, and each undercut portion comprises a shaped surface for receiving and reversing the direction of a fluid flow generated by the incoming ladle stream.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a longitudinal cross-section view of a water flow-model study tundish having an asymmetrical fluid flow pattern.
FIG. 2 is a transverse cross-section view taken along the lines 2--2 of FIG. 1.
FIG. 3a is a plan view showing the preferred embodiment of the impact pad invention for use in a tundish having an asymmetrical ladle stream fluid flow pattern.
FIG. 3b is a front perspective view taken along the line 3b--3b of FIG. 3a.
FIG. 4 is a longitudinal cross-section view through a single strand caster tundish showing the preferred embodiment of the impact pad invention.
FIG. 5 is a longitudinal cross-section view through a multiple strand "T" shaped tundish showing the preferred embodiment of the impact pad invention.
FIG. 6a is a plan view showing an alternate embodiment of the impact pad invention for use in a tundish having an asymmetrical fluid flow pattern.
FIG. 6b is a perspective view taken along the line 6b--6b of FIG. 6a.
FIG. 7 is a longitudinal cross-section view through the end wall portion of a tundish showing the alternate embodiment of the impact pad invention for use in a tundish having an asymmetrical fluid flow pattern.
FIG. 8 is a longitudinal cross-section view through the end wall portion of a tundish showing a second alternate embodiment of the impact pad invention for use in a tundish having an asymmetrical fluid flow pattern.
FIG. 9 is a front perspective view showing the preferred embodiment of the impact pad invention for use in a tundish having a symmetrical ladle stream fluid flow pattern.
FIG. 10 is a longitudinal cross-section view through a multiple strand caster tundish showing the preferred impact pad invention for use with a symmetrical fluid flow pattern.
FIG. 11 is a transverse cross-section view taken along the lines 11--11 of FIG. 10.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The overall geometry of a continuous caster tundish is dictated by the location and number of strands within the casting machine. A rectangular, or a "Bathtub" shaped tundish, is customarily used with a single strand caster, and a trough shaped tundish is generally used for a multiple strand caster. Likewise, the location of the well blocks, and the tundish impact pad, is also determined by the casting machine design.
Referring to FIG. 4 of the drawings, a tundish 11a for a single strand caster, is shown having a well block 12 at one end of the tundish, and an impact pad 13 positioned adjacent to the end wall 3 at the end opposite the well block. This tundish arrangement produces an asymmetrical fluid flow 9a within the reservoir of liquid steel 5.
FIGS. 10 and 11 illustrate a tundish 11c for a multiple strand caster. The tundish well blocks 12 are spaced apart along the length of the tundish floor 4, and the tundish impact pad 16 is located between adjacent well blocks 12. This tundish arrangement produces a symmetrical fluid flow shown at 9b.
A variation of the multiple strand tundish comprises a "T" shaped reservoir shown as 11b in FIG. 5. Tundish 11b is comprised of two trough shaped reservoirs arranged perpendicular to each other. One end of the first trough shaped reservoir A, interects the second reservoir B. The opposite end portion of reservoir A includes an impact pad 13 adjacent end wall 3. In this tundish arrangement, the incoming ladle stream generates an asymmetrical fluid flow 9a, similar to the fluid flow shown in FIG. 4.
Referring to FIGS. 1 and 2, water flow-model studies have shown that the fluid flow, generated by an incoming ladle stream, is reflected from the flat tundish floor 4 in an upward direction toward the surface of the liquid steel. If this fluid flow is restricted by the tundish walls, the restricted fluid flow is forced upward along the surface of such walls, and the resulting upward surge causes a boiling wave motion at the surface of the steel bath.
FIG. 1 illustrates a single strand tundish 11a having an asymmetrical fluid flow 9a. The ladle shroud 7 is shown adjacent end wall 3 opposite the well block 12. End wall 3 obstructs the fluid flow 9a, and the restricted forces cause an upward fluid flow surge along end wall 3. This upward flow follows a circular path 9c, and comprises an upward surge along the face of wall 3, and a downward flow around the ladle shroud 7. The upward surge of circular flow 9c causes excessive turbulence at the surface of the bath, breaks up a protective flux or slag cover 6, and exposes the liquid steel to the outside atmosphere, thereby creating conditions for possible uncontrolled chemical changes within the liquid steel bath. The downward flow around the ladle shroud generates shear and vortices and pulls broken particles 10, from the flux cover 6, down into the liquid steel bath, creating inclusions within the finished steel product.
As shown in FIG. 2, water flow-model studies have also shown that the sidewalls 2 of tundish 11a also restrict the fluid flow generated by the ladle stream. The restrictive sidewalls 2 cause similar circular fluid flows 9e which further intensify surface turbulence and break up of the protective flux cover 6.
Referring to FIGS. 3a through 5 of the drawings, an impact pad 13, for use in a tundish having an asymmetrical fluid flow 9a, is shown located adjacent the end wall 3 of a tundish and positioned below the ladle shroud 7. The impact pad, which is a refractory shape, includes a base 17 having an erosion resistant top surface for receiving the incoming ladle stream 8. Impact pad 13 further includes a sidewall 18 extending in an upward direction along the periphery of base 17. Sidewall 18 partially encircles the incoming ladle stream 8 providing an open side 23 along one edge of the impact pad adjacent well blocks 12.
Sidewall 18 includes an inclined outer surface 19 contiguous with the tundish walls, a top surface 20 having a semi-circular or "C" shaped, serpentine edge partially encircling the ladle stream 8, and an inner surface 21 facing the incoming ladle stream. Sidewall 18 further includes a curvilinear undercut portion 22 having a shaped surface capable of reversing the direction of the fluid flow 9a. Undercut 22 extends along the length of the inner surface 21 below top surface 20, and undercut 22 has one end tangent to top surface 17' of base 17. In order to achieve effective control over the fluid flow generated by the incoming ladle stream, the height "H", of the curvilinear undercut, is ≧ the inside diameter of the shroud delivering the liquid steel into the tundish.
As shown in FIGS. 4 and 5, the incoming ladle stream 8 falls onto the base top surface 17', generates a radial asymmetrical fluid flow 9a, and emanates toward the impact pad sidewall 18. The curvilinear undercut 22, extending along the inside surface 21 of sidewall 18, captures the fluid flow within its shaped surface, and forces the fluid flow into a reversed direction back toward the incoming ladle stream. The reversed fluid flow forms an eddy current 9d, which is gradually disbursed along the open side 23, toward the well blocks 12 at the opposite end of the tundish.
FIGS. 6a, 6b and 7, disclose an alternate impact pad embodiment for use in a tundish having an asymmetrical fluid flow 9a. The alternate impact pad 14 is shown adjacent a tundish end wall 3, and positioned below the ladle shroud 7 to receive the incoming ladle stream 8. The alternate impact pad embodiment comprises a refractory shape having a base 24, and a sidewall 25 extending in an upward direction along the periphery of base 24. Sidewall 25 partially encircles the incoming ladle stream 8 to provide an open side 26 along the edge of the impact pad adjacent well blocks 12.
The impact pad sidewall 25 includes an inclined outer surface 27 contiguous with the tundish walls, a top surface 28 having a "C" shaped, serpentine edge partially encircling the ladle stream 8, and an inner surface 29 facing the incoming ladle stream. The inner surface 29, of sidewall 25, is sloped at an angle θ in a downward direction from the serpentine edge, of top surface 28, toward the inclined outer surface 27 to provide a planar undercut 30. Angle θ is between 45° and 75°, and the planar undercut portion 30 extends along the length of the inner surface 29 below top surface 28. In order to achieve effective control over the fluid flow generated by the incoming ladle stream, the height "H", of the planar undercut, is ≧ the inside diameter of the shroud delivering the liquid steel into the tundish.
As shown in FIG. 7, planar undercut 30, extending along the inside surface 29 of sidewall 25, captures the fluid flow within its shaped surface, and forces the fluid flow into a reversed direction back toward the incoming ladle stream. The reversed fluid flow forms an eddy current 9d, which is gradually disbursed along the open side 26, toward the well blocks 12 at the opposite end of the tundish.
A second alternate embodiment of the impact pad invention for use in a tundish having an asymmetrical fluid flow 9a, is shown as 15 in FIG. 8. Impact pad 15 is positioned adjacent tundish end wall 3 and below ladle shroud 7 to receive the incoming ladle stream 8. Impact pad 15 comprises a base having a top surface 31 sloped in a downward direction from the tundish end wall 3 toward the tundish floor 4. Impact pad 15 further includes a pad sidewall 32 extending in an upward direction along the periphery of the base. Sidewall 32 partially encircles the incoming ladle stream 8, and includes an inner surface having a planar undercut surface 33 similar to undercut 30, sloped in a downward direction at angle θ between 45° and 75°.
FIGS. 9-11 illustrate the preferred embodiment of the impact pad invention for use in a continuous casting tundish having a symmetrical ladle stream fluid flow 9b. Impact pad 16 comprises a base 34 having an erosion resistant top surface 34', sidewalls 35 and 36 extending along opposite edges of base 34, and two open ends 41 located between the opposed pad sidewalls 35 and 36. Pad sidewalls 35 and 36 extend in an upward direction from their respective opposite base edge portions, and each pad sidewall, 35 and 36, includes an inclined outer surface 37 contiguous with a tundish wail, a top surface 38, and an inner surface 39 facing the incoming ladle stream. Each pad sidewall 35 and 36 further includes a curvilinear undercut portion 40 having a shaped surface capable of reversing the direction of the fluid flow 9d generated by the incoming ladle stream 8. Each undercut 40 extends along the length of inner surface 39 below top surface 38, and each undercut 40 has one end tangent to top surface 34' of base 34.
As shown in FIGS. 10 and 11 of the drawings, the inclined outer surface 37 of sidewalls 35 and 36 are positioned adjacent the tundish sidewalls 2. The incoming ladle stream 8 falls onto the base top surface 34', generates a radial symmetrical fluid flow, and emanates toward the impact pad sidewalls 35 and 36. The curvilinear undercut 40, extending along each inside surface 39 of sidewalls 35 and 36, captures the fluid flow within their shaped surface, and forces the fluid flow into a reversed direction back toward the incoming ladle stream. The reversed fluid flow forms eddy currents 9d, which are gradually disbursed along the open ends 41, toward the well blocks 12 spaced apart along the length of the tundish floor.
Although impact pad 16 has been shown to comprise a curvilinear undercut 40, it should be understood that the undercut portion could just as well comprise a sloped planar undercut as disclosed in FIGS. 6a-8.
And, although FIG. 10 shows only two well blocks, it should be understood that a casting machine for casting more than two continuous strands would require more than two well blocks spaced apart along the length of the tundish floor.
While this invention has been illustrated and described in accordance with a preferred embodiment, it is recognized that variations and changes may be made therein without departing from the invention as set forth in the claims.

Claims (30)

We claim:
1. An impact pad for reversing the direction of a fluid flow generated by an incoming liquid stream, said impact pad comprising: a base having a surface against which said liquid stream impacts, a peripheral top surface to expose said base, and a sidewall extending in an upward direction along the periphery of said base, said sidewall extending between said base and said peripheral top surface and including;
a) a first end, a second end remote from said first end, and
b) an inner surface including an undercut extending continuously below said peripheral top surface.
2. The invention described in claim 1 wherein said sidewall extends along three sides of said base periphery.
3. The invention described in claim 1 wherein said peripheral top surface comprises a "C" shaped configuration.
4. The invention described in claim 1 wherein said undercut is a curvilinear surface.
5. The invention described in claim 4 wherein said curvilinear surface comprises a first arcuate surface below said peripheral top surface, a second arcuate surface tangent to said base surface against which said liquid strum impacts, and a transitional surface extending between said first arcuate surface and said second arcuate surface.
6. The invention described in claim 1 wherein said undercut is a planar surface below said peripheral top surface, said planar surface being sloped at an angle θ of between 45° and 75°.
7. An impact pad for reversing the direction of a fluid flow generated by an incoming liquid stream, said impact pad comprising: a base having a surface against which said liquid stream impacts, a first sidewall extending in an upward direction along a first edge of said base, and a second sidewall extending in an upward direction along a second edge of said base, said first sidewall and said second sidewall being opposite hand, and said first and said second sidewall each including;
a) a first end, a second end remote from said first end, and a top surface, and
b) an inner surface including an undercut extending continuously below said top surface, said undercut including a curvilinear surface having a first arcuate surface below said top surface, a second arcuate surface tangent to said base surface against which said liquid stream impacts, and a transitional surface extending between said first and said second arcuate surfaces.
8. An impact pad for reversing the direction of a fluid flow generated by an incoming liquid stream, said impact pad comprising: a base having a surface against which said liquid stream impacts, a first sidewall extending in an upward direction along a first edge of said base, and a second sidewall extending in an upward direction along a second edge of said base, said first sidewall and said second sidewall being opposite hand, and said first and said second sidewall each including;
a) a first end, a second end remote from said first end, and a top surface, and
b) an inner surface including an undercut extending continuously below said top surface, said undercut being a planar surface sloped at an angle θ of between 45° and 75°.
9. In a continuous caster tundish for containing a reservoir of molten metal having an asymmetrical fluid flow generated by an incoming ladle stream, the tundish including first end wall, a second end wall, sidewalls and a floor, said floor having one or more well blocks located near said first end wall, and said floor including a ladle stream impact area positioned proximate said second end wall, wherein the improvement comprises an impact pad for reversing the direction of said fluid flow generated by said incoming ladle stream comprising: a base having a surface against which said liquid stream impacts, a peripheral top surface to expose said base, and a sidewall extending in an upward direction along the periphery of said base, said sidewall extending between said base and said peripheral top surface and including;
a) a first end, a second end remote from said first end, and
b) an inner surface including an undercut extending continuously below said peripheral top surface.
10. The invention described in claim 9 wherein said sidewall extends along three sides of said base periphery.
11. The invention described in claim 9 wherein said peripheral top surface comprises a "C" shaped configuration.
12. The invention described in claim 9 wherein said first end and said second end remote from said first end provide a fluid flow outlet, said outlet being located along said base portion adjacent the well blocks of the tundish.
13. The invention described in claim 9 wherein said undercut is a curvilinear surface.
14. The invention described in claim 13 wherein said curvilinear surface comprises a first arcuate surface below said peripheral top surface, a second arcuate surface remote from said first arcuate surface and tangent to said base surface against which said liquid stream impacts, and a transitional surface extending between said first arcuate surface and said second arcuate surface.
15. The invention described in claim 14 wherein a height "H" of said curvilinear surface is ≧ the inside diameter of said tubular ladle shroud.
16. The invention described in claim 9 wherein said undercut is a planar surface below said peripheral top surface, said planar surface being sloped at an angle θ of between 45° and 75°.
17. The invention described in claim 16 wherein a height "H" of said planar surface is ≧ the inside diameter of said tubular ladle shroud.
18. The invention described in claim 16 wherein said base surface against which said liquid stream impacts is sloped in a downward direction from said second tundish end wall toward said tundish floor.
19. In a continuous caster tundish for containing a reservoir of molten metal having a symmetrical fluid flow generated by an incoming ladle stream, the tundish including a first sidewall, a second sidewall, end walls and a floor, said floor having two or more well blocks spaced along the length thereof, and said floor including a ladle stream impact area positioned between adjacent well blocks, wherein the improvement comprises an impact pad for reversing the direction of said fluid flow generated by said incoming ladle stream comprising: a base having a surface against which said liquid stream impacts, a first sidewall extending in an upward direction along a first edge of said base, and a second sidewall extending in an upward direction along a second edge of said base, said first sidewall and said second sidewall being opposite hand, and said first and said second sidewall each including;
a) a first end, a second end remote from said first end, and a top surface, and
b) an inner surface including an undercut extending continuously below said top surface, said undercut including a curvilinear surface having a first arcuate surface below said top surface, a second arcuate surface tangent to said base surface against which said liquid stream impacts, and a transitional surface extending between said first and said second arcuate surfaces.
20. The invention described in claim 19 wherein a height "H" of said curvilinear undercut is ≧ the inside diameter of said ladle shroud.
21. In a continuous caster tundish for containing a reservoir of molten metal having a symmetrical fluid flow generated by an incoming ladle stream, the tundish including a first sidewall, a second sidewall, end walls and a floor, said floor having two or more well blocks spaced along the length thereof, and said floor including a ladle stream impact area positioned between adjacent well blocks, wherein the improvement comprises an impact pad for reversing the direction of said fluid flow generated by said incoming ladle stream comprising: a base having a surface against which said liquid stream impacts, a first sidewall extending in an upward direction along a first edge of said base, and a second sidewall extending in an upward direction along a second edge of said base, said first sidewall and said second sidewall being opposite hand, and said first and said second sidewall each including;
a) a first end, a second end remote from said first end, and a top surface, and
b) an inner surface including an undercut extending continuously below said top surface, said undercut being a planar surface sloped at an angle θ of between 45° and 75°.
22. The invention described in claim 20 wherein a height "H" of said curvilinear undercut is ≧ the inside diameter of said ladle shroud. .Iadd.
23. An impact pad, comprising: a base having a surface against which an incoming ladle stream impacts and upon which the fluid thereof flows, a peripheral top surface to expose said base, and a side wall extending in an upward direction along the periphery of said base, said side wall extending between said base and said peripheral top surface and including an inner surface having an undercut extending continuously below said peripheral top surface so that the fluid flow of the ladle stream is forced into a reversed direction back toward the incoming ladle stream. .Iaddend..Iadd.
24. The invention described in claim 23 wherein said undercut is a curvilinear surface. .Iaddend..Iadd.25. The invention described in claim 24 wherein said curvilinear surface comprises a first arcuate surface below said peripheral top surface, a second arcuate surface remote from said first arcuate surface and tangent to said base surface against which said incoming ladle stream impacts, and a transitional surface extending between said first arcuate surface and said second arcuate surface. .Iaddend..Iadd.26. The invention described in claim 23 wherein said undercut is a planar surface below said peripheral top surface, said planar surface being sloped at an angle φ of between 45° and
75°. .Iaddend..Iadd.27. In a continuous caster tundish for containing a reservoir of molten metal having fluid flow generated by an incoming ladle stream, the tundish including a first end wall, a second end wall, sidewalls, and a floor, said floor including at least one well block for discharging molten metal from the continuous caster tundish, and the floor including an impact area to receive the incoming ladle stream, the impact area positioned proximate a shroud introducing the incoming ladle stream, wherein the improvement comprises an impact pad located in the impact area for reversing the direction of the fluid flow generated by the incoming ladle stream comprising: a base having a surface against which the incoming ladle stream impacts, a peripheral top surface to expose said base, and a sidewall extending in an upward direction along the periphery of said base, said sidewall extending between said base and said peripheral top surface and including an inner surface having an undercut extending continuously below said peripheral top surface so that fluid flow of the ladle stream is forced into a reversed direction back
toward the incoming ladle stream. .Iaddend..Iadd.28. The invention described in claim 27 wherein said undercut is a curvilinear surface. .Iaddend..Iadd.29. The invention described in claim 28 wherein said curvilinear surface comprises a first arcuate surface below said peripheral top surface, a second arcuate surface remote from said fast arcuate surface and tangent to said base surface against which said incoming ladle stream impacts, and a transitional surface extending between said first arcuate surface and said second arcuate surface. .Iaddend..Iadd.30. The invention described in claim 29 wherein said shroud is tubular and the height "H" of said curvilinear surface is ≧ the
inside diameter of said shroud. .Iaddend..Iadd.31. The invention described in claim 27 wherein said undercut is a planar surface below said peripheral top surface, said planar surface being sloped at an angle φ of between 45° and 75°. .Iaddend..Iadd.32. The invention described in claim 31 wherein said shroud is tubular and the height "H" of said planar surface is ≧ the inside diameter of said shroud. .Iaddend..Iadd.33. The invention described in claim 31 wherein said base surface against which said incoming ladle stream impacts is sloped in a downward direction from a tundish end wall toward said tundish floor.
.Iaddend..Iadd.34. An impact pad for reversing the direction of fluid flow generated by an incoming ladle stream, said impact pad comprising: a base having a surface against which an incoming ladle stream impacts, a peripheral top surface to expose said base, and a sidewall extending in an upward direction along the periphery of said base, said sidewall extending between said base and said peripheral top surface and including an inner surface having an undercut for receiving and reversing the direction of a fluid flow generated by the incoming ladle stream. .Iaddend..Iadd.35. The impact pad of claim 34, wherein:
a) said undercut is arcuate. .Iaddend..Iadd.36. The impact pad of claim 34, wherein:
a) said undercut is planar.
.Iadd.37. The impact pad of claim 34, wherein:
a) said sidewall extends partially about said base. .Iaddend..Iadd.38. The impact pad of claim 37, wherein:
a) said sidewall has first and second remote ends forming therebetween an opening through which the fluid flow may flow. .Iaddend..Iadd.39. The impact pad of claims 35 or 36, wherein:
a) said undercut extends along the length of said inner surface. .Iaddend..Iadd.40. The impact pad of claim 34, wherein:
a) said peripheral top surface is C-shaped in plan. .Iaddend..Iadd.41. The impact pad of claim 34, wherein:
a) said base is rectangular in plan, and
b) there are two sidewalls, each sidewall extending along an edge of said base and said sidewalls extending in parallel. .Iaddend..Iadd.42. An impact pad for reversing the direction of a fluid flow generated by an incoming ladle stream, said impact pad comprising: a base having a surface against which an incoming ladle stream impacts, a peripheral top surface to expose said base, and a sidewall extending from said base in an upward direction, said sidewall extending between said base and said peripheral top surface and including an inner surface having an undercut extending below said peripheral top surface for receiving and reversing the direction of a fluid flow generated by the incoming ladle stream.
.Iaddend..Iadd.43. The impact pad of claim 42, wherein:
a) said undercut is arcuate. .Iaddend..Iadd.44. The impact pad of claim 42, wherein:
a) said undercut is planar. .Iaddend..Iadd.45. The impact pad of claims 43 or 44, wherein:
a) said undercut extends along the length of said inner surface. .Iaddend..Iadd.46. The impact pad of claim 45, wherein:
a) said sidewall extends partially about said base. .Iaddend..Iadd.47. The impact pad of claim 46, wherein:
a) said sidewall is peripherally disposed about said base. .Iaddend.
US08/347,975 1992-02-07 1994-12-01 Impact pad for a continuous caster tundish Expired - Lifetime USRE35685E (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/347,975 USRE35685E (en) 1992-02-07 1994-12-01 Impact pad for a continuous caster tundish

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/832,520 US5169591A (en) 1992-02-07 1992-02-07 Impact pad for a continuous caster tundish
US08/347,975 USRE35685E (en) 1992-02-07 1994-12-01 Impact pad for a continuous caster tundish

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US07/832,520 Reissue US5169591A (en) 1992-02-07 1992-02-07 Impact pad for a continuous caster tundish

Publications (1)

Publication Number Publication Date
USRE35685E true USRE35685E (en) 1997-12-09

Family

ID=25261886

Family Applications (2)

Application Number Title Priority Date Filing Date
US07/832,520 Ceased US5169591A (en) 1992-02-07 1992-02-07 Impact pad for a continuous caster tundish
US08/347,975 Expired - Lifetime USRE35685E (en) 1992-02-07 1994-12-01 Impact pad for a continuous caster tundish

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US07/832,520 Ceased US5169591A (en) 1992-02-07 1992-02-07 Impact pad for a continuous caster tundish

Country Status (2)

Country Link
US (2) US5169591A (en)
CA (1) CA2082459C (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5861121A (en) * 1996-11-21 1999-01-19 Psc Technologies, Inc. Chamber for reception, Lateral division and redirection of liquid metal flow
US6554167B1 (en) 2001-06-29 2003-04-29 North American Refractories Co. Impact pad
US6929775B2 (en) 2002-09-04 2005-08-16 Magneco/Metrel, Inc. Tundish impact pad
US7004227B2 (en) 2001-05-22 2006-02-28 Vesuvius Crucible Company Impact pad for dividing and distributing liquid metal flow
US20070132162A1 (en) * 2005-12-14 2007-06-14 North American Refractories Co. Impact pad for metallurgical vessels
US20090050285A1 (en) * 2007-08-20 2009-02-26 North American Refractories Company Impact pad
US20090152308A1 (en) * 2007-12-14 2009-06-18 Harrison Steel Castings Co. Turbulence Inhibiting Impact Well for Submerged Shroud or Sprue Poured Castings
EP2769785A1 (en) * 2013-02-25 2014-08-27 Refractory Intellectual Property GmbH & Co. KG Refractory impact pad
US9308581B2 (en) 2014-03-28 2016-04-12 ArceloMittal Investigacion y Desarrollo, S.L. Impact pad, tundish and apparatus including the impact pad, and method of using same

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5358551A (en) * 1993-11-16 1994-10-25 Ccpi, Inc. Turbulence inhibiting tundish and impact pad and method of using
CN1069243C (en) * 1994-11-09 2001-08-08 福塞科国际有限公司 Tundish impact pad
US5518153A (en) * 1994-11-09 1996-05-21 Foseco International Limited Tundish impact pad
US5551672A (en) * 1995-01-13 1996-09-03 Bethlehem Steel Corporation Apparatus for controlling molten metal flow in a tundish to enhance inclusion float out from a molten metal bath
JP3398154B2 (en) * 1995-01-26 2003-04-21 フォセコ、インターナショナル、リミテッド Tundish
GB9517633D0 (en) * 1995-08-30 1995-11-01 Foseco Int Tundish impact pad
US5597528A (en) * 1995-08-31 1997-01-28 A.P. Green Industries, Inc. Impact pad
US5662823A (en) * 1996-01-04 1997-09-02 A. P. Green Industries, Inc. Impact pad
GB9607556D0 (en) * 1996-04-11 1996-06-12 Foseco Int Tundish impact pad
US6102260A (en) * 1996-11-21 2000-08-15 Psc Technologies, Inc. Impact pad
FR2756761B1 (en) * 1996-12-11 1999-01-08 Ugine Savoie Sa SUPPLY TANK INTENDED TO RETAIN MELTED METAL AND IN PARTICULAR STEEL
DE19726540C2 (en) * 1997-06-23 2002-11-28 Gft Ges Fuer Feuerfest Technik impact absorber
US6083453A (en) * 1997-12-12 2000-07-04 Uss/Kobe Steel Company Tundish having fume collection provisions
GB9816458D0 (en) * 1998-07-29 1998-09-23 Foseco Int Tundish impact pad
GB9913241D0 (en) * 1999-06-08 1999-08-04 Foseco Int Impact pad for tundish
US6516870B1 (en) * 2000-05-15 2003-02-11 National Steel Corporation Tundish fluxing process
KR100584749B1 (en) * 2001-12-22 2006-05-30 주식회사 포스코 A tundish
DE10202537C1 (en) * 2002-01-24 2003-01-23 Intocast Ag Feuerfestprodukte Metallurgical vessel used as a tundish having a determined baffle head comprises a plate-like base having an inner chamber formed on the base with a wall
ZA200206261B (en) * 2002-03-28 2003-04-07 Foseco Int Metallurgical impact pad.
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
ITMI20031356A1 (en) * 2003-07-02 2005-01-03 Danieli Off Mecc CRYSTALLIZER MOLTENING METAL FEEDER.
DE102006005723A1 (en) * 2006-02-08 2007-08-16 Purmetall Gmbh & Co. Kg Injection pot for receiving a flowing out of a casting ladle metallic melt
DE102006005724B3 (en) * 2006-02-08 2007-05-31 Purmetall Gmbh & Co. Kg Casting pot for molten metal from casting pan has sector of side wall made with aperture passing into stepped bath connecting to outside wall of pot
EP1955794B1 (en) 2007-02-08 2012-02-01 Berthold Stilkerieg Tundish with impact pad for avoiding splash and rotative swivel
DE102007060140A1 (en) 2007-02-08 2008-08-14 Stilkerieg, Berthold, Dipl.-Ing. Steel tundish has inclined baffle insert and rims with angled outer laminar overflow margins
DE202007009179U1 (en) 2007-06-29 2008-11-06 Purmetall Gesellschaft für Stahlveredelung GmbH u. Co Betriebskommanditgesellschaft Ingot for receiving a flowing out of a ladle metallic melt
EP2047928A1 (en) 2007-10-08 2009-04-15 Foseco International Limited Metallurgic impact pad
DE102008005731A1 (en) 2008-01-23 2009-07-30 Stilkerieg, Berthold, Dipl.-Ing. Mounting body for distributing vessel useful in steel industry for preventing spray appearance in the area of the distributing vessel, comprises rectangular or circular collecting body arranged on tundish bottom in impact zone of steel jet
BRPI1002628A2 (en) 2010-07-27 2012-03-27 Magnesita Refratarios S A turbulence reducer for use in continuous casting steel distributors
CN101972840A (en) * 2010-11-29 2011-02-16 中冶连铸技术工程股份有限公司 Billet continuous casting machine and tundish thereof
KR101867645B1 (en) * 2011-06-14 2018-06-15 베수비우스 유에스에이 코포레이션 Impact pad
EP2537609A1 (en) 2011-06-23 2012-12-26 Calderys Ukraine Ltd. Metal-flow impact pad and diffuser for tundish
RU2477197C1 (en) * 2011-11-23 2013-03-10 Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) Steel teeming pony ladle with chambers for liquid metal plasma heating
ES2595214T3 (en) * 2013-04-26 2016-12-28 Refractory Intellectual Property Gmbh & Co. Kg Wash spoon and bottom of it
CN103252465B (en) * 2013-05-10 2015-07-29 东北大学 A kind of turbulence inhibitor for asymmetric continuous casting production
RU2644095C2 (en) * 2016-06-23 2018-02-07 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" Tundish for steel continuous casting
TWI739877B (en) 2016-08-08 2021-09-21 美商維蘇威美國公司 Impact pad and method for reducing the effects of misalignment of an impinging stream of molten steel entering a refractory vessel
MX2020006559A (en) * 2017-12-21 2020-09-24 Vesuvius Usa Corp Configured tundish.
RU2691473C1 (en) * 2018-05-25 2019-06-14 Федеральное государственное бюджетное образовательное учреждение высшего образования "Грозненский государственный нефтяной технический университет имени акад. М.Д. Миллионщикова" Continuous steel casting method
RU2712206C1 (en) * 2019-03-05 2020-01-24 Сергей Касимович Вильданов Method of filling with refractory material outlet channel of steel casting ladle

Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887171A (en) * 1973-03-12 1975-06-03 Kloeckner Werke Ag Apparatus for purifying in continuous casting silicon- and/or aluminium-killed steel
US4042229A (en) * 1975-06-17 1977-08-16 Foseco Trading A.G. Tundish with weirs
DE2643009A1 (en) * 1976-09-24 1978-03-30 Odermath Gmbh Heinrich Refractory anti-splash grid for tundish - prevents tundish erosion during the continuous casting of steel
US4177855A (en) * 1977-03-28 1979-12-11 Foseco Trading A.G. Tundish and method of pouring molten metal therewith
US4339115A (en) * 1979-03-22 1982-07-13 Daussan Et Compagnie Heat insulating lining for metallurgical vessels
US4383570A (en) * 1980-10-06 1983-05-17 American General Supply Company Method of pouring steel into a container
US4632368A (en) * 1984-05-08 1986-12-30 Centro Sperimentale Metallurgico S.P.A. Continuous casting tundish with post-refining treatment reactor functions
US4653733A (en) * 1984-10-03 1987-03-31 Inland Steel Company Tundish with fluid flow control structure
US4671499A (en) * 1985-02-22 1987-06-09 Nippon Steel Corporation Tundish for continuous casting of free cutting steel
US4711429A (en) * 1986-08-29 1987-12-08 Usx Corporation Tundish for mixing alloying elements with molten metal
US4715586A (en) * 1987-02-18 1987-12-29 Bethlehem Steel Corporation Continuous caster tundish having wall dams
US4770395A (en) * 1987-06-16 1988-09-13 Sidbec Dosco Inc. Tundish
US4776570A (en) * 1987-07-08 1988-10-11 Sidbec Dosco Inc. Ladle stream breaker
US4852632A (en) * 1985-12-13 1989-08-01 Inland Steel Co. Apparatus for preventing undissolved alloying ingredient from entering continuous casting mold
US4909484A (en) * 1988-08-02 1990-03-20 Dresser Industries, Inc. Prevention of slag buildup in steel ladles
US4993692A (en) * 1989-07-10 1991-02-19 Brown William K Unitary tundish linings with flow-control devices
US5072916A (en) * 1990-05-29 1991-12-17 Magneco/Metrel, Inc. Tundish impact pad
US5131635A (en) * 1990-05-29 1992-07-21 Magneco/Metrel, Inc. Impact pad with rising flow surface
US5133535A (en) * 1990-05-29 1992-07-28 Magneco/Metrel, Inc. Impact pad with horizontal flow guides
US5139239A (en) * 1990-08-18 1992-08-18 Foseco International Limited Lining of molten metal handling vessels
US5160480A (en) * 1991-06-03 1992-11-03 Usx Corporation Tundish turbulence suppressor pad
US5188796A (en) * 1990-05-29 1993-02-23 Magneco/Metrel, Inc. Tundish impact pad
US5358551A (en) * 1993-11-16 1994-10-25 Ccpi, Inc. Turbulence inhibiting tundish and impact pad and method of using

Patent Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887171A (en) * 1973-03-12 1975-06-03 Kloeckner Werke Ag Apparatus for purifying in continuous casting silicon- and/or aluminium-killed steel
US4042229A (en) * 1975-06-17 1977-08-16 Foseco Trading A.G. Tundish with weirs
DE2643009A1 (en) * 1976-09-24 1978-03-30 Odermath Gmbh Heinrich Refractory anti-splash grid for tundish - prevents tundish erosion during the continuous casting of steel
US4177855A (en) * 1977-03-28 1979-12-11 Foseco Trading A.G. Tundish and method of pouring molten metal therewith
US4339115A (en) * 1979-03-22 1982-07-13 Daussan Et Compagnie Heat insulating lining for metallurgical vessels
US4383570A (en) * 1980-10-06 1983-05-17 American General Supply Company Method of pouring steel into a container
US4632368A (en) * 1984-05-08 1986-12-30 Centro Sperimentale Metallurgico S.P.A. Continuous casting tundish with post-refining treatment reactor functions
US4739972A (en) * 1984-05-08 1988-04-26 Centro Sperimentale Metallurgico S.P.A. Method for continuously casting molten metal
US4653733A (en) * 1984-10-03 1987-03-31 Inland Steel Company Tundish with fluid flow control structure
US4671499A (en) * 1985-02-22 1987-06-09 Nippon Steel Corporation Tundish for continuous casting of free cutting steel
US4852632A (en) * 1985-12-13 1989-08-01 Inland Steel Co. Apparatus for preventing undissolved alloying ingredient from entering continuous casting mold
US4711429A (en) * 1986-08-29 1987-12-08 Usx Corporation Tundish for mixing alloying elements with molten metal
US4715586A (en) * 1987-02-18 1987-12-29 Bethlehem Steel Corporation Continuous caster tundish having wall dams
US4770395A (en) * 1987-06-16 1988-09-13 Sidbec Dosco Inc. Tundish
US4776570A (en) * 1987-07-08 1988-10-11 Sidbec Dosco Inc. Ladle stream breaker
US4909484A (en) * 1988-08-02 1990-03-20 Dresser Industries, Inc. Prevention of slag buildup in steel ladles
US4993692A (en) * 1989-07-10 1991-02-19 Brown William K Unitary tundish linings with flow-control devices
US5072916A (en) * 1990-05-29 1991-12-17 Magneco/Metrel, Inc. Tundish impact pad
US5131635A (en) * 1990-05-29 1992-07-21 Magneco/Metrel, Inc. Impact pad with rising flow surface
US5133535A (en) * 1990-05-29 1992-07-28 Magneco/Metrel, Inc. Impact pad with horizontal flow guides
US5188796A (en) * 1990-05-29 1993-02-23 Magneco/Metrel, Inc. Tundish impact pad
US5139239A (en) * 1990-08-18 1992-08-18 Foseco International Limited Lining of molten metal handling vessels
US5160480A (en) * 1991-06-03 1992-11-03 Usx Corporation Tundish turbulence suppressor pad
US5358551A (en) * 1993-11-16 1994-10-25 Ccpi, Inc. Turbulence inhibiting tundish and impact pad and method of using

Non-Patent Citations (8)

* Cited by examiner, † Cited by third party
Title
33 Metal Producing, Sep. 1994, pp. 21 23, and 47, Taming the Thunder by Jo Isenberg O,Loughlin. *
33 Metal Producing, Sep. 1994, pp. 21-23, and 47, "Taming the Thunder" by Jo Isenberg-O,Loughlin.
Continuous Casting, vol. 1, Iron & Steel Society of AIME Dec. 1983 pp. 99 112, Water Modeling A Viable Production Tool, D. J. Harris, et. al. *
Continuous Casting, vol. 1, Iron & Steel Society of AIME Dec. 1983 pp. 99-112, Water Modeling--A Viable Production Tool, D. J. Harris, et. al.
Paper given at an AIME Conference, (04) Spring 1994, pp. 198 199. Development of a Turbulence Inhibiting Pouring Pad/Flow Control Device for a Tundish by D. Bolger. *
Paper given at an AIME Conference, (04)-Spring 1994, pp. 198-199. "Development of a Turbulence Inhibiting Pouring Pad/Flow Control Device for a Tundish" by D. Bolger.
Premier Refractories, Blueprint Drawing No. SK 276, Sep. 30, 1991. *
Premier Refractories, Blueprint--Drawing No. SK 276, Sep. 30, 1991.

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5861121A (en) * 1996-11-21 1999-01-19 Psc Technologies, Inc. Chamber for reception, Lateral division and redirection of liquid metal flow
US7004227B2 (en) 2001-05-22 2006-02-28 Vesuvius Crucible Company Impact pad for dividing and distributing liquid metal flow
US6554167B1 (en) 2001-06-29 2003-04-29 North American Refractories Co. Impact pad
US6929775B2 (en) 2002-09-04 2005-08-16 Magneco/Metrel, Inc. Tundish impact pad
US20070132162A1 (en) * 2005-12-14 2007-06-14 North American Refractories Co. Impact pad for metallurgical vessels
US7468157B2 (en) 2005-12-14 2008-12-23 North American Refractories Co. Impact pad for metallurgical vessels
US20090050285A1 (en) * 2007-08-20 2009-02-26 North American Refractories Company Impact pad
US8066935B2 (en) 2007-12-14 2011-11-29 The Harrison Steel Castings Company Turbulence inhibiting impact well for submerged shroud or sprue poured castings
US20090152308A1 (en) * 2007-12-14 2009-06-18 Harrison Steel Castings Co. Turbulence Inhibiting Impact Well for Submerged Shroud or Sprue Poured Castings
US8383032B2 (en) 2007-12-14 2013-02-26 Harrison Steel Castings Company Turbulence inhibiting impact well for submerged shroud or sprue poured castings
EP2769785A1 (en) * 2013-02-25 2014-08-27 Refractory Intellectual Property GmbH & Co. KG Refractory impact pad
WO2014128013A1 (en) * 2013-02-25 2014-08-28 Refractory Intellectual Property Gmbh & Co. Kg Refractory impact pad
AU2014220873B2 (en) * 2013-02-25 2016-01-21 Refractory Intellectual Property Gmbh & Co. Kg Refractory impact pad
US9815112B2 (en) 2013-02-25 2017-11-14 Refractory Intellectual Property Gmbh & Co. Kg Refractory impact pad
EA028440B1 (en) * 2013-02-25 2017-11-30 Рифрэктори Интеллектчуал Проперти Гмбх Унд Ко. Кг Refractory impact pad
US9308581B2 (en) 2014-03-28 2016-04-12 ArceloMittal Investigacion y Desarrollo, S.L. Impact pad, tundish and apparatus including the impact pad, and method of using same
US9643248B2 (en) 2014-03-28 2017-05-09 Arcelormittal Investigacion Y Desarrollo, S.L. Impact pad, tundish and apparatus including the impact pad, and method of using same

Also Published As

Publication number Publication date
CA2082459A1 (en) 1993-08-08
CA2082459C (en) 1995-10-10
US5169591A (en) 1992-12-08

Similar Documents

Publication Publication Date Title
USRE35685E (en) Impact pad for a continuous caster tundish
JP4638545B2 (en) Tundish impact pad for continuous casting
US5358551A (en) Turbulence inhibiting tundish and impact pad and method of using
CA2162548A1 (en) Tundish impact pad
US5381857A (en) Apparatus and method for continuous casting
AU2002310036A1 (en) Impact pad for dividing and distributing liquid metal flow
US5882577A (en) Tundish
CA2076575C (en) Impact pad with rising flow surface
US4715586A (en) Continuous caster tundish having wall dams
EP0790873B1 (en) Tundish impact pad
US9643248B2 (en) Impact pad, tundish and apparatus including the impact pad, and method of using same
US3867978A (en) Method and apparatus for introduction of steel into a continuous casting mold
JP2000508245A (en) Tundish buffer pad
EP0587759A1 (en) Tundish turbulence suppressor pad.
CA2390741C (en) Impact pad
EP2373447B1 (en) Tundish impact pad
JPS61193755A (en) Electromagnetic stirring method
Crowley et al. Cleanliness improvement using a turbulence suppressing tundish impact pad
KR20030044589A (en) Tundish dam for guiding molten iron
CA2174266A1 (en) Tundish impact pad and method
KR200295766Y1 (en) Turn Dish Nozzle for Continuous Casting Machine
JPH07256410A (en) Method for continuously casting molten metal
JPH03165958A (en) Submerged nozzle for continuous casting
JPH03161150A (en) Tundish for continuous casting

Legal Events

Date Code Title Description
FPAY Fee payment

Year of fee payment: 8

AS Assignment

Owner name: ISG TECHNOLOGIES, INC., OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BETHLEHEM STEEL CORPORATION;REEL/FRAME:014033/0881

Effective date: 20030506

AS Assignment

Owner name: CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGE

Free format text: PLEDGE AND SECURITY AGREEMENT;ASSIGNOR:INTERNATIONAL STEEL GROUP, INC.;REEL/FRAME:013663/0415

Effective date: 20030507

FPAY Fee payment

Year of fee payment: 12

AS Assignment

Owner name: ISG HENNEPIN, INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG SPARROWS POINT INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG PIEDMONT INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG RAILWAYS, INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG VENTURE, INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG CLEVELAND WEST, INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG ACQUISITION INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG RIVERDALE INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG INDIANA HARBOR INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: INTERNATIONAL STEEL GROUP, INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG BURNS HARBOR INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG SALES, INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: BETHLEHEM HIBBING CORPORATION, OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG CLEVELAND INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG LACKAWANNA INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG STEELTON INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG SOUTH CHICAGO & INDIANA HARBOR RAILWAY COMPANY

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG TECHNOLOGIES, INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG CLEVELAND WORKS RAILWAY COMPANY, OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG CLEVELAND WEST PROPERTIES, INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG/EGL HOLDING COMPANY, OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG WARREN INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG PLATE INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613

Owner name: ISG HIBBING, INC., OHIO

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE CIT GROUP/BUSINESS CREDIT, INC., AS COLLATERAL AGENT;REEL/FRAME:019432/0170

Effective date: 20070613