US3858642A - Apparatus for delivering metal to a rotating continuous casting drum - Google Patents

Apparatus for delivering metal to a rotating continuous casting drum Download PDF

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Publication number
US3858642A
US3858642A US367143A US36714373A US3858642A US 3858642 A US3858642 A US 3858642A US 367143 A US367143 A US 367143A US 36714373 A US36714373 A US 36714373A US 3858642 A US3858642 A US 3858642A
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United States
Prior art keywords
molten metal
casting
trough
baffle
section
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
US367143A
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English (en)
Inventor
Louis Battiston
Paul Niessen
John R Wellington
Thorpe E Watson
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.)
Teck Metals Ltd
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Teck Metals Ltd
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Publication date
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Publication of US3858642A publication Critical patent/US3858642A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
    • B22D25/04—Casting metal electric battery plates or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
    • B22D11/0614—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires the casting wheel being immersed in a molten metal bath, and drawing out upwardly the casting strip
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85954—Closed circulating system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86187—Plural tanks or compartments connected for serial flow
    • Y10T137/86204—Fluid progresses by zigzag flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86187—Plural tanks or compartments connected for serial flow
    • Y10T137/86212—Plural compartments formed by baffles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86236—Tank with movable or adjustable outlet or overflow pipe

Definitions

  • the apparatus comprises a feed trough having a system of holding and casting sec tions, weirs, baffles, and conduits for providing a controlled flow of molten metal of uniform temperature to a quiescent bath of said molten metal, free of entrained gas bubbles, in a drum casting zone.
  • This invention relates to a method and apparatus for casting metal strips from a molten metal and more particularly relates to a method and apparatus for the continuous casting of metal strips from a reactive molten metal alloy.
  • dross Formation of this dross is undesirable in that the dross tends to become entrapped in the metal that forms the grids and subsequently adversely affects the physical and electrochemical properties of the grids. Also, dross formation is undesirable in that it causes depletion of the reactive metal additive in solidified alloy.
  • lead-calcium alloy cannot be handled satisfactorily in a conventional book-mold type grid casting machine because of drossing due to its reactivity, of its lack of fluidity during casting and of its lack of tensile strength immediately after casting. Although lead-calcium alloy becomes stronger through aging, the grids are very difficult to handle immediately after casting, and poor castability and weak strength characteristics dictate the production of thick grids and the use of an inert atmosphere. Such alloy can be handled more readily by known continuous casting procedures.
  • U.S. Pat. No. 2,074,812 discloses a process in which a drum rotates in a bath of molten metal in a covered chamber, dross being excluded from the metal within the chamber by a submerged partition. Bath level control is not provided for or disclosed in this patent.
  • U.S. Pat. No. 3,228,072 discloses a method of casting between moving belts in which numerous grooves leading from a pouring box provide non-turbulent flow of molten metal with uniform distribution across the width of the lower belt. Metal flows under a lateral baffle in front of the grooves into a pool at the entrance of a casting region defined by the converging belts. The distribution method maintains a layer of cooler metal on the lower belt, thereby preventing warping. In order to pass through the numerous grooves, the molten metal must be sufficiently above melting temperature to prevent freezing. The temperature differential in the casting region would cause irregularities in drum cast sheet.
  • I provide an apparatus for delivery of molten metal to and maintenance of a quiescent pool of said molten metal at the peripheral surface of a rotating drum dipping in said pool for casting of said metal on the drum, said apparatus comprising a substantially rectangular trough, inlet means for introducing molten metal from a reservoir and outlet means for return of excess molten metal to said reservoir, said trough having a holding section and a casting section, first and second opposed spacedapart weirs mounted on adjacent internal walls of said holding and casting sections, said first weir adapted to discharge molten metal from the holding section and said second weir adapted to discharge molten metal from the casting section, means for adjusting the heights of said weirs relative to each other, a channel beneath said internal walls communicating said holding section with said casting section, baffle means disposed within said holding section to evenly distribute incoming molten metal across the holding section, a plate defining the upper face of said channel and extending into said casting section, the part
  • the FIGURE shows schematically the method and apparatus of the invention.
  • a lead-base alloy is prepared for casting in a suitable heated reservoir 1 by melting 99.99+percent pure lead into which is alloyed the prescribed amount of an additive such as elemental calcium or lead-calcium master alloy.
  • an additive such as elemental calcium or lead-calcium master alloy.
  • the molten alloy is conveyed through a closed system comprising pump 3 and conduit 4 to feeding trough 5 which comprises a holding section 6 and a casting section 7.
  • the holding section and part of the casting section are enclosed throughout the casting of reactive metal alloy to form a chamber 30 within which the flow and levels of the molten metal are controlled under an inert gas cover.
  • the molten metal surface is exposed to air during start-up of operations.
  • Holding section 6 a combination of baffles and a weir is used to control the rate and pattern of metal flow through adjustable channel 8 into casting section 7.
  • Holding section 6 comprises feed gallery 10 with inner wall 11, partially submerged baffle 12, and inclined baffle 13.
  • Levels of molten alloy in the holding and casting sections, shown by broken lines and 16 respectively, are controlled by the relative heights of opposed spaced-apart overflow weirs 17 and 18 that are mounted on adjacent internal walls of the holding and casting sections. Flowing metal in excess of that which is removed by casting passes under immersed baffle 28 and over weir 18 into overflow compartment 19 between weirs l7 and 18 and returns to reservoir 1 through conduit 20.
  • Plate 21 defines the upper face of channel 8 and has a sloping portion 22 extending into casting section 7.
  • Weirs l7 and 18, overflow compartment l9, conduit and plate 21 are shown as parts of a unit 14 which may be adjusted vertically, such as by Spacers and ed. m untin ltades gnatesl y meral 32.
  • Als 6, weirs l7 and 18 preferably are mounted for adjustment relative to each other, for example, by means of a vertically adjustable lip 33, shown attached to weir 17 by threaded mounting bolts 35 to control the relative heights of levels 15 and 16 for reasons which will become apparent as the description proceeds.
  • Rotating casting drum 23 which is internally water-cooled, is immersed in molten metal in the casting section to a depth that is sufficient to permit adhesion on its peripheral face of a layer of solidified metal sheet 24.
  • sheet 24 advances to tensioning device 25 and take-up roll 26.
  • Holding section 6 and a part of casting section 7 that is adjacent overflow weir 18 are enclosed by cover 9, thereby forming control chamber 30.
  • molten metal flows into feed gallery 10, through laterally spaced holes near the top of wall 11 and under submerged baffle 12 to rise over inclined baffle 13. Volumetric surges together with a regular portion of the molten metal flow over weir 17, to return to heated reservoir 1, to permit the main stream of the metal to flow at a uniform rate to the casting section.
  • This metal flows downward, through channel 8, and rises at decreased linear velocity as the sectional area increases below sloping extension 22 to fill casting section 7 to a level determined by the height of overflow weir 18.
  • Part of the molten metal I entering casting section 7 is removed by rotating drum 23, the balance flowing over weir 18 and returning to heated reservoir 1.
  • a flow of inert gas through the space below cover 9 and above the molten bath provides protection against oxidation of the molten metal within holding section 6.
  • the exposed portion of molten metal surface 16 in the zone immediately adjacent drum 23 is not protected against oxidation.
  • This arrangement permits convenient access to the drum for necessary handling of sheet 24 as it begins to form.
  • a protective cover (not shown) may be placed over the casting section.
  • baffle l2 Relatively rapid descent and rise of the flowing metal through a somewhat narrowed channel surrounding submerged baffle l2 promotes the separation of dross that may be present in the molten metal in reservoir 1. This dross rises readily to the surface as the flowing metal approaches weir 17. If surges in metal delivery develop, waves will be set up on the part of molten surface 15 that is immediately in front of weir l7. Inclined baffle l3 directs any such waves and accumulated dross over weir 17, leaving the lead flowing through the remainder of the system substantially free of dross and unaffected by the surges. In order that metal may flow through to casting section 7, the height of weir 17 cannot be lower than that of weir 18. Preferably, weir 17 is slightly higher than weir 18, thereby directing a greater proportion of the flow to the casting section.
  • the internal structures of the trough help to maintain uniform temperature and uniform flow of the molten metal. Stabilization of the temperature of the flowing metal is promoted in the relatively large portion of holding section 6 that is below inclined baffle l3.
  • Coarse adjustments of metal flow to the casting section are made by vertical movement of the plate 21 to vary the height of channel 8.
  • Molten metal from channel 8 moves horizontally across the bottom of the expanded zone beneath inclined portion 22 and rises in a uniform flow, providing steady, non-turbulent entry and passage through casting section 7.
  • Direct flow of surface metal to overflow weir 18 is prevented by immersed baffle 28, an extension of cover 9.
  • Molten metal surrounding immersed baffle 28 provides a seal between the atmosphere on the drum side and the inert-gas-filled chamber 30 in which control of levels and flows is maintained.
  • the quiescent upward movement of the whole cross section of molten metal towards the surface causes only minimal disturbance of the portion of surface 16 that is near drum 23.
  • Avoidance of turbulence-promoted oxidation of reactive elements in the molten metal alloy permits start-up and short term operation without excessive inclusion of dross or depletion of elemental reactive metal in the cast metal sheet.
  • the movement of the molten metal around sloping portion 22 results in the flowing metal achieving substantial temperature homogenization by the time it reaches the drum.
  • Inner wall 11 of the feed gallery, baffles 12 and 13, and plate 21 are thermally conductive, thereby promoting temperature stabilization of surrounding molten metal.
  • Inclined baffle 31 extending across the width of the trough preferably is disposed within the molten metal under drum 23 with its upper end extending under immersed baffle 28 and its lower end extending slightly beyond the upper edge of the sloping portion 22 of plate 21.
  • Baffle 31 is effective in diverting gas bubbles, such as hydrogen gas bubbles rising from the underside of sloping portion 22 of plate 21, to baffle 28 for collection in chamber 30 and thereby avoiding inclusion of the gas bubbles in the metal solidifying on the drum without adversely affecting or disturbing the flow pattern of molten metal about the passage between the edge of sloping portion 22 and the outer wall of the trough.
  • the baffle could be disposed as shown by the broken lines designated 31 to divert the bubbles towards the outer end wall of casting section 7.
  • the rate of flow of inert gas, such as argon, through the upper part of holding section 6 is kept low so as to prevent pressurizing the system and thus affecting the metal level in the casting section.
  • Apparatus for delivery of a molten metal to and maintenance of a quiescent pool of said molten metal at the peripheral surface of a rotating drum dipping into said pool for casting of said metal onto the drum comprising a substantially rectangular trough, inlet means for introducing molten metal from a reservoir and outlet means for return of excess molten metal to said reservoir; said trough having a holding section and a casting section, first and second opposed, spacedapart weirs mounted on adjacent internal walls of said holding and casting sections, and first weir adapted to discharge molten metal from the holding section and said second weir adapted to discharge molten metal from the casting section, means for adjusting the heights of said weirs relative to each other, a channel beneath said internal walls communicating with holding section with said casting section, baffle means disposed within said holding section to evenly distribute incoming molten metal across the holding section, a plate defining the upper face of said channel and extending into said casting section, the part of said plate that extends into said casting section being
  • a trough as claimed in claim 1, said holding section comprising a feed gallery having an inner wall with horizontally disposed holes across its upper end, a submerged baffle and a baffle with an upper portion inclined towards said first weir, whereby molten metal that is introduced into said feed gallery disperses across said trough through said horizontally disposed holes, passes under said submerged baffle and passes over said included upper portion, and thence flows downward into said channel, and whereby dross and surges of molten metal are directed over said first weir.
  • a trough as claimed in claim 1 said upper plate of said channel being extended into said holding section.
  • a trough as claimed in claim 1 said immersed baffle in said casting section being an extension of a cover that spans said holding section, thereby closing said holding section and part of said casting section to provide for an inert gas cover.
  • a trough as claimed in claim 1 an inclined immersed baffle extending across the width of the trough and disposed within the casting section below the drum, whereby gas bubbles rising from the upwardly sloping part of the plate are diverted, thereby avoiding inclusion of the gas bubbles in metal solidifying on the drum.
  • a trough as claimed in claim 1 the heights and spacing of said walls and baffles providing for the retention of relatively large masses of molten metal in both holding and casting sections thereby achieving substantial temperature homogenization of the molten metal by the time it reaches the drum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US367143A 1972-10-31 1973-06-05 Apparatus for delivering metal to a rotating continuous casting drum Expired - Lifetime US3858642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA155,736A CA978324A (en) 1972-10-31 1972-10-31 Casting machine improvement

Publications (1)

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US3858642A true US3858642A (en) 1975-01-07

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ID=4094914

Family Applications (1)

Application Number Title Priority Date Filing Date
US367143A Expired - Lifetime US3858642A (en) 1972-10-31 1973-06-05 Apparatus for delivering metal to a rotating continuous casting drum

Country Status (8)

Country Link
US (1) US3858642A (enrdf_load_stackoverflow)
JP (1) JPS534497B2 (enrdf_load_stackoverflow)
CA (1) CA978324A (enrdf_load_stackoverflow)
DE (1) DE2354247C2 (enrdf_load_stackoverflow)
FR (1) FR2204471B1 (enrdf_load_stackoverflow)
GB (1) GB1441319A (enrdf_load_stackoverflow)
IT (1) IT999118B (enrdf_load_stackoverflow)
SE (1) SE385273B (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926247A (en) * 1974-10-29 1975-12-16 Cominco Ltd Lead sheet casting machine
US3958622A (en) * 1973-02-23 1976-05-25 Mitsui Mining & Smelting Co., Ltd. Apparatus for continuously manufacturing endless lead sheet
US4016925A (en) * 1973-02-23 1977-04-12 Mitsui Mining & Smelting Co., Ltd. Method for continuously manufacturing endless lead sheet
US4190095A (en) * 1976-10-28 1980-02-26 Allied Chemical Corporation Chill roll casting of continuous filament
US4210176A (en) * 1978-09-14 1980-07-01 J. I. Case Company Hydraulic liquid reservoir with internal baffle
US4259055A (en) * 1979-10-01 1981-03-31 E. I. Du Pont De Nemours And Company Coating apparatus
US4791959A (en) * 1987-07-17 1988-12-20 Xerox Corporation Release agent management system for a heated fuser roll
WO1994007629A1 (en) * 1992-10-05 1994-04-14 Cominco Ltd. Method and apparatus for producing metal strip
US5337806A (en) * 1988-10-21 1994-08-16 Buchi Laboratoriums-Technik Ag Method and device for heating or cooling a reaction flask
US5503217A (en) * 1990-07-23 1996-04-02 Davy Mckee (Sheffield) Limited Method of manufacturing metal strip
US5948566A (en) * 1997-09-04 1999-09-07 Gnb Technologies, Inc. Method for making lead-acid grids and cells and batteries using such grids
CN1048435C (zh) * 1993-12-29 2000-01-19 科明哥公司 生产金属带的方法和设备
KR100886422B1 (ko) * 2004-11-04 2009-03-02 가부시키가이샤 고마쓰 세이사쿠쇼 유압 탱크

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1031533A (en) * 1974-10-28 1978-05-23 Theodore J. Seymour Lead sheet casting machine
JPS5959272U (ja) * 1982-10-13 1984-04-18 トヨタ自動車株式会社 万力
ES2006806A6 (es) * 1988-02-03 1989-05-16 Remetal Sa Perfeccionamientos en los sitemas repartidores de metal liquido en las lingoteras.
CN113263162B (zh) * 2021-04-20 2022-12-02 广州市通上德智能装备有限公司 一种铅合金挂浆式铸带机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US993904A (en) * 1911-02-28 1911-05-30 Ribbon Metals Syndicate Ltd Apparatus for making metal strips, foil, sheets, or ribbons.
US1082287A (en) * 1913-12-23 Axel Schaeffer Apparatus for feeding semiliquid materials.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA396499A (en) * 1941-05-13 Douglas Turnbull Alexander Metal sheet casting machine
DE674691C (de) * 1936-02-19 1939-04-19 Bernhard Berghaus Vorrichtung zum Herstellen von Blechen aus fluessigem Metall
DE711133C (de) * 1936-02-19 1941-09-26 Bernhard Berghaus Verfahren zum Herstellen von Verbundstraengen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1082287A (en) * 1913-12-23 Axel Schaeffer Apparatus for feeding semiliquid materials.
US993904A (en) * 1911-02-28 1911-05-30 Ribbon Metals Syndicate Ltd Apparatus for making metal strips, foil, sheets, or ribbons.

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958622A (en) * 1973-02-23 1976-05-25 Mitsui Mining & Smelting Co., Ltd. Apparatus for continuously manufacturing endless lead sheet
US4016925A (en) * 1973-02-23 1977-04-12 Mitsui Mining & Smelting Co., Ltd. Method for continuously manufacturing endless lead sheet
US3926247A (en) * 1974-10-29 1975-12-16 Cominco Ltd Lead sheet casting machine
US4190095A (en) * 1976-10-28 1980-02-26 Allied Chemical Corporation Chill roll casting of continuous filament
US4210176A (en) * 1978-09-14 1980-07-01 J. I. Case Company Hydraulic liquid reservoir with internal baffle
US4259055A (en) * 1979-10-01 1981-03-31 E. I. Du Pont De Nemours And Company Coating apparatus
US4791959A (en) * 1987-07-17 1988-12-20 Xerox Corporation Release agent management system for a heated fuser roll
US5337806A (en) * 1988-10-21 1994-08-16 Buchi Laboratoriums-Technik Ag Method and device for heating or cooling a reaction flask
US5503217A (en) * 1990-07-23 1996-04-02 Davy Mckee (Sheffield) Limited Method of manufacturing metal strip
WO1994007629A1 (en) * 1992-10-05 1994-04-14 Cominco Ltd. Method and apparatus for producing metal strip
AU690524B2 (en) * 1992-10-05 1998-04-30 Teck Cominco Metals Ltd Method and apparatus for producing metal strip
RU2118583C1 (ru) * 1992-10-05 1998-09-10 Коминко Лтд. Способ и устройство для изготовления металлической полосы
CN1048435C (zh) * 1993-12-29 2000-01-19 科明哥公司 生产金属带的方法和设备
US5948566A (en) * 1997-09-04 1999-09-07 Gnb Technologies, Inc. Method for making lead-acid grids and cells and batteries using such grids
KR100886422B1 (ko) * 2004-11-04 2009-03-02 가부시키가이샤 고마쓰 세이사쿠쇼 유압 탱크

Also Published As

Publication number Publication date
GB1441319A (en) 1976-06-30
IT999118B (it) 1976-02-20
DE2354247A1 (de) 1974-05-02
CA978324A (en) 1975-11-25
FR2204471A1 (enrdf_load_stackoverflow) 1974-05-24
FR2204471B1 (enrdf_load_stackoverflow) 1980-04-11
DE2354247C2 (de) 1983-01-13
JPS534497B2 (enrdf_load_stackoverflow) 1978-02-17
SE385273B (sv) 1976-06-21
JPS4977832A (enrdf_load_stackoverflow) 1974-07-26

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