US3324935A - Induction furnace for horizontal, continuous metal casting - Google Patents

Induction furnace for horizontal, continuous metal casting Download PDF

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Publication number
US3324935A
US3324935A US369563A US36956364A US3324935A US 3324935 A US3324935 A US 3324935A US 369563 A US369563 A US 369563A US 36956364 A US36956364 A US 36956364A US 3324935 A US3324935 A US 3324935A
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United States
Prior art keywords
furnace
hollow body
horizontal
outlet opening
metal
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Expired - Lifetime
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US369563A
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Alfred J Wertli
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Priority claimed from CH647663A external-priority patent/CH402289A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/14—Charging or discharging liquid or molten material
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
    • B22D11/047—Means for joining tundish to mould
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5241—Manufacture of steel in electric furnaces in an inductively heated furnace
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
    • F27B14/061—Induction furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B2014/008—Continuous casting
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to an induction furnace for horizontal, continuous metal casting, having an outlet in the lower portion of the furnace for releasing the melt.
  • the hollow body extending into the furnace intercepts the current in the melt caused by the electric field and effects calming of the metal flowing through the hollow body before the metal reaches the mold. There are therefore no eddy currents in the melt before entering the mold which facilitates casting and improves the product.
  • numeral 1 designates an induction furnace having an outlet opening 4 in the outer wall 2 close to the bottom 3 of the furnace for releasing the melt, a mold 5 being inserted from the outside into the opening 4.
  • the mold 5 is replacea-bly connected to the wall 2 and is surrounded by a conventional cooler 6.
  • the furnace 1 has an inner wall 7 which extends around a vertical axis 8 and confines a space 9 which contains induction coils arranged in the conventional manner and not shown.
  • An annular space 10 is formed between the inner wall 7 and the outer Wall 2 of the furnace which space is entirely or only partly filled with melt during operation of the furnace.
  • a hollow body 11 is connected to the furnace wall 2 at the outlet opening 4 and extends into the space 10 containing melt, for conducting melt to the mold 5 connected to the outlet opening 4.
  • the hollow body 11 is made of refractory material and has a configuration similar to that of a quarter bend.
  • the body 11 has an inlet opening 12 placed in a horizontal plane at an elevation somewhat higher than the upper part of the outlet opening 4.
  • the area of the inlet opening 12, which may be round or oval, is smaller than that of the outlet opening of the hollow body and the flow area of the conduit formed by the hollow body increases gradually from the inlet opening to the outlet opening of the hollow body 11.
  • the space 10 in the furnace 1 is filled with liquid metal to above the inlet opening 12 wherefrom the metal flows through the hollow body 11 into the mold 5 where the metal solidifies with the aid of the cooler 6.
  • the solid metal is gradually pulled out of the mold by conventional means, not shown.
  • the hollow body Patented June 13, 1967 11 intercepts in the neighborhood of the outlet opening 4 the current of the melt produced by the electric field of the induction coils so that this current cannot adversely affect the metal flowing into the mold 5.
  • the metal flowing into the mold has been calmed in the hollow body 11 so that the horizontal casting process can be operated without disturbance and a homogenous product can be obtained.
  • the hollow body 11 assures efficient warming up and keeping warm of the mold prior to casting and during casting intermissions because the hollow body 11 is always surrounded during these times by liquid metal remaining in the lower portion of the furnace.
  • outlet opening 4 may be so designed that a plurality of molds can be connected and a plurality of metal bars can be cast simultaneously.
  • An induction furnace for horizontal, continuous casting of metal comprising:
  • a hollow body connected to said lower furnace portion at said outlet opening and extending into the furnace for conducting liquid metal from the furnace into said mold, said hollow body having an inlet opening placed inside said lower portion at an elevation above said outlet opening whereby said hollow body interrupts the current within the molten metal to calm the metal flowing through said hollow body.
  • An induction furnace for horizontal continuous castin g of metal comprising a lower furnace portion including a vertical side wall having an outlet opening therein for passage of molten metal through said vertical wall,
  • hollow body connected to said vertical Wall at said outlet opening and extending into said lower surface portion, said hollow body having an let opening inside said lower furnace portion above said outlet opening in said vertical wall.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

Jam 33, 26? A. J. WERTLI 3,324,935
INDUCTION FURNACE FOR HORIZONTAL, CON'IINUOUSMETAL CASTING Filed May 22, 1964 United States Patent 3,324,935 INDUCTION FURNACE FOR HORIZONTAL, CONTINUOUS METAL CASTING Alfred J. Wertli, 15 Poststrasse, Winterthur, Switzerland Filed May 22, 1964, Ser. No. 369,563 Claims priority, application Switzerland, May 25, 1963, 6,476/ 63 6 Claims. (Cl. 164-281) The invention relates to an induction furnace for horizontal, continuous metal casting, having an outlet in the lower portion of the furnace for releasing the melt.
In conventional induction furnaces of the aforesaid type the current in the melt produced by the electric field causes difficulties when casting because this current disturbs flow of the melt into the mold whereby the quality of the cast metal is impaired.
It is the object of the invention to provide an induction furnace for horizontal, continuous metal casting which avoids the difficulties experienced with conventional induction furnaces, by providing a hollow body at the outlet of the furnace which body extends into and communicates the interior of the furnace to the mold. The hollow body extending into the furnace intercepts the current in the melt caused by the electric field and effects calming of the metal flowing through the hollow body before the metal reaches the mold. There are therefore no eddy currents in the melt before entering the mold which facilitates casting and improves the product.
The novel features which are considered characteristic of the invention are set forth with particularity in the appended claims. The invention itself, however, and additional objects and advantages thereof will best be understood from the following description of embodiments thereof when read in connection with the accompanying drawing, the one figure of which shows a longitudinal section through the lower part of a furnace according to the invention.
Referring more particularly to the drawing, numeral 1 designates an induction furnace having an outlet opening 4 in the outer wall 2 close to the bottom 3 of the furnace for releasing the melt, a mold 5 being inserted from the outside into the opening 4. The mold 5 is replacea-bly connected to the wall 2 and is surrounded by a conventional cooler 6. The furnace 1 has an inner wall 7 which extends around a vertical axis 8 and confines a space 9 which contains induction coils arranged in the conventional manner and not shown. An annular space 10 is formed between the inner wall 7 and the outer Wall 2 of the furnace which space is entirely or only partly filled with melt during operation of the furnace.
A hollow body 11 is connected to the furnace wall 2 at the outlet opening 4 and extends into the space 10 containing melt, for conducting melt to the mold 5 connected to the outlet opening 4. The hollow body 11 is made of refractory material and has a configuration similar to that of a quarter bend. The body 11 has an inlet opening 12 placed in a horizontal plane at an elevation somewhat higher than the upper part of the outlet opening 4. The area of the inlet opening 12, which may be round or oval, is smaller than that of the outlet opening of the hollow body and the flow area of the conduit formed by the hollow body increases gradually from the inlet opening to the outlet opening of the hollow body 11.
Before casting, the space 10 in the furnace 1 is filled with liquid metal to above the inlet opening 12 wherefrom the metal flows through the hollow body 11 into the mold 5 where the metal solidifies with the aid of the cooler 6. The solid metal is gradually pulled out of the mold by conventional means, not shown. The hollow body Patented June 13, 1967 11 intercepts in the neighborhood of the outlet opening 4 the current of the melt produced by the electric field of the induction coils so that this current cannot adversely affect the metal flowing into the mold 5. The metal flowing into the mold has been calmed in the hollow body 11 so that the horizontal casting process can be operated without disturbance and a homogenous product can be obtained.
The hollow body 11 assures efficient warming up and keeping warm of the mold prior to casting and during casting intermissions because the hollow body 11 is always surrounded during these times by liquid metal remaining in the lower portion of the furnace.
Without departing from the scope of the present invention the outlet opening 4 may be so designed that a plurality of molds can be connected and a plurality of metal bars can be cast simultaneously.
I claim:
1. An induction furnace for horizontal, continuous casting of metal, comprising:
a lower furnace portion,
an outlet opening for the molten metal in said lower furnace portion,
a mold connected to said lower furnace portion within said outlet opening and extending therefrom, and
a hollow body connected to said lower furnace portion at said outlet opening and extending into the furnace for conducting liquid metal from the furnace into said mold, said hollow body having an inlet opening placed inside said lower portion at an elevation above said outlet opening whereby said hollow body interrupts the current within the molten metal to calm the metal flowing through said hollow body.
2. An induction furnace as defined in claim 1 wherein said lower furnace portion has a side wall and a bottom, said outlet opening being in said side wall adjacent said bottom.
3. An induction furnace as defined in claim 1 wherein said hollow body has substantially the configuration of a quarter bend.
4. An induction furnace as defined in claim 1 wherein said hollow body has an inlet opening placed in a horizontal plane.
5. An induction furnace for horizontal continuous castin g of metal comprising a lower furnace portion including a vertical side wall having an outlet opening therein for passage of molten metal through said vertical wall,
a mold connected to said vertical wall within said outlet opening and extending therefrom, and
a. hollow body connected to said vertical Wall at said outlet opening and extending into said lower surface portion, said hollow body having an let opening inside said lower furnace portion above said outlet opening in said vertical wall.
6. An induction furnace as defined in claim 1 wherein said hollow body has an outlet for releasing liquid metal into said mold, the flow area of said hollow body increasing gradually from said inlet opening to said outlet.
References Cited UNITED STATES PATENTS 2,530,854 11/1950 Brennan 2257.2 3,022,552 2/1962 Tessmann 22-57.2 3,076,241 2/1963 Simonson et al. 2257.2 X 3,125,440 3/1964 Hornak et al 22200.1 X 3,210,812 10/1965 Berwick 2257.2
I. SPENCER OVERHOLSER, Primary Examiner.
R. S. ANNEAR, Assistant Examiner.

Claims (1)

1. AN INDUCTION FURNACE FOR HORIZONTAL, CONTINUOUS CASTING OF METAL, COMPRISING: A LOWER FURNACE PORTION, AN OUTLET OPENING FOR THE MOLTEN METAL IN SAID LOWER FURNACE PORTION, A MOLD CONNECTED TO SAID LOWER FURNACE PORTION WITHIN SAID OUTLET OPENING AND EXTENDING THEREFROM, AND A HOLLOW BODY CONNECTED TO SAID LOWER FURNACE PORTION AT SAID OUTLET OPENING AND EXTENDING INTO THE FURNACE
US369563A 1963-05-25 1964-05-22 Induction furnace for horizontal, continuous metal casting Expired - Lifetime US3324935A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH1280485X 1963-05-25
CH647663A CH402289A (en) 1963-05-25 1963-05-25 Induction furnace for horizontal continuous casting of metal
FR975674A FR1395478A (en) 1963-05-25 1964-05-25 Induction furnace for horizontal, continuous casting of metals

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US3324935A true US3324935A (en) 1967-06-13

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FR (1) FR1395478A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940264A (en) * 1972-06-05 1976-02-24 Granges Essem Aktiebolag Method of distributing molten metal to consumer stations

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530854A (en) * 1946-03-19 1950-11-21 Joseph B Brennan Casting apparatus
US3022552A (en) * 1959-08-24 1962-02-27 Alfred H Tessmann Continuous casting apparatus
US3076241A (en) * 1959-06-22 1963-02-05 Reynolds Metals Co Graphite mold casting system
US3125440A (en) * 1960-12-27 1964-03-17 Tlbr b
US3210812A (en) * 1962-12-31 1965-10-12 Scovill Manufacturing Co Continuous casting mold

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530854A (en) * 1946-03-19 1950-11-21 Joseph B Brennan Casting apparatus
US3076241A (en) * 1959-06-22 1963-02-05 Reynolds Metals Co Graphite mold casting system
US3022552A (en) * 1959-08-24 1962-02-27 Alfred H Tessmann Continuous casting apparatus
US3125440A (en) * 1960-12-27 1964-03-17 Tlbr b
US3210812A (en) * 1962-12-31 1965-10-12 Scovill Manufacturing Co Continuous casting mold

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940264A (en) * 1972-06-05 1976-02-24 Granges Essem Aktiebolag Method of distributing molten metal to consumer stations

Also Published As

Publication number Publication date
FR1395478A (en) 1965-04-09

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