US3835915A - Arrangement for use in making slab ingots by electric slag-refining - Google Patents

Arrangement for use in making slab ingots by electric slag-refining Download PDF

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Publication number
US3835915A
US3835915A US00247576A US24757672A US3835915A US 3835915 A US3835915 A US 3835915A US 00247576 A US00247576 A US 00247576A US 24757672 A US24757672 A US 24757672A US 3835915 A US3835915 A US 3835915A
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section
arrangement
horizontal cross
set forth
electrode
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Expired - Lifetime
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US00247576A
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English (en)
Inventor
W Holzgruber
P Machner
L Schwarz
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Gebrueder Boehler and Co AG
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Gebrueder Boehler and Co AG
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • C22B9/18—Electroslag remelting
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/60—Heating arrangements wherein the heating current flows through granular powdered or fluid material, e.g. for salt-bath furnace, electrolytic heating

Definitions

  • Electrodes which are horizontally spaced from the ingot mold walls which form the long sides of the horizontal cross-section by a larger distance at the central portion of these ingot mold walls than at the edge portions of said walls to promote a uniform temperature distribution in the ingot as it solidifies. Because the electrode spacing increases as stated and its thickness decreases correspondingly relative to the thickness of the ingot, the slag layer area flown through by the electric current is decreased too. Hence, less heat is generated in the central portion of the cross-section of the ingot and the heat is .generated there at a larger distance from the ingot mold walls.
  • the electrode arrangement according to the invention has also the advantage that it can be adapted to all known circuit and electrode arrangements. Preferred embodiments are shown by way of example on the accompanying drawing in top plan views.
  • FIG. 1 shows an arrangement comprising a single electrode disposed in a rectangular ingot mold.
  • FIG. 2 shows an arrangement which comprises two electrodes in a rectangular ingot mold.
  • FIG. 3 shows an arrangement comprising three electrodes in a rectangular ingot mold.
  • FIGS. 4, 5 and 6 show arrangements comprising one, two, and three electrodes, respectively, which have curved surfaces spaced from the long sides of the inside surfaces of the ingot mold;
  • FIG. 7 shows an arrangement which comprises one I-shaped electrode in a rectangular ingot mold
  • FIG. 8 shows an arrangement comprising three rectangular electrodes in a rectangular ingot mold
  • FIG. 9 shows an arrangement comprising one rectangular electrode in a curved ingot mold
  • FIG. 10 shows an arrangement comprising three rectangular electrodes in a curved ingot mold
  • FIG. 1 1 shows an arrangement comprising two round electrodes and one rectangular electrode in a rectangular ingot mold.
  • the simplest embodiment comprises a single electrode, which is disposed in a rectangular ingot mold and has such a double-trapezoidal cross-section that the electrode has the smallest thickness at the center of its cross-section.
  • This embodiment is shown in a top plan view in FIG. 1 of the drawing.
  • the spacing a of this electrode 1 from the ingot mold walls 2 forming the long sides of the crosssection of the ingot mold is not uniform but increases toward the center.
  • the increase of the spacing a is selected so that the average angle between the ingot mold wall and the surface of the electrode is about 2 to 8.
  • Such a remelting plant may be supplied in known manner with single-phase altemating current if the bottom plate and the electrode are connected to respective output terminals of the transformer.
  • FIG. 2 Another embodiment of the invention is shown in FIG. 2 and comprises two electrodes 1, which may be connected in parallel and supplied with single-phase alternating current.
  • any known power supply system maybe employed, e.g., a supply from two separate transformers or a supply from one transformer with the electrodes 1 connected in series.
  • the distance a between the ingot mold walls 2 and the electrodes 1 varies in the same manner as in FIG. 1.
  • an electrode arrangement as shown in FIG. 3 is recommendable, in which the distance a of the electrodes 1 differs only for the outer electrodes 1, whereas the central electrode 1' is rectangular in crosssection.
  • the electrodes are connected in known manner to the transformer for three-phase alternating current.
  • FIG. 4 shows an arrangement according to the invention with a single electrode 1
  • FIG. 5 an arrangement with two electrodes
  • FIG. 6 one with three electrodes. All these embodiments exhibit a nonuniform change of the distance a between the electrode and the ingot mold wall in that the electrode crosssection is defined by a curve.
  • FIGS. 2 and 5 show examples in which the change spacing is changed only in part. Step changes of the spacing are also possible within the scope of the invention. Such embodiments are illustrated by way of example in FIGS. 7 and 8 showing electrode arrangements comprising one and three electrodes, respectively.
  • Electrodes may be used which have a constant thickness at their edge portions and in their central portion.
  • Embodiments comprising a cambered ingot mold are shown in FIGS. 9 and 10 with a single rectangular electrode and three rectangular electrodes respectively.
  • the outer electrodes are circular in cross-section and have a larger diameter than the thickness of the inner rectangular electrode. It will be understood that electrodes having a non-uniform thickness may be combined with cambered ingot molds.
  • the mean spacing is critical, ie, the lines passing through the waves at one-half of the height thereof are considered as the boundaries of the cross-sections of the ingot mold and electrode or electrodes.
  • An arrangement for use in making slab ingots by an electric slag-refining process which comprises an ingot mold having inside surfaces which define an elongated horizontal cross-section having long sides, each of said long sides having a central portion and outer portions, and
  • fusible electrode means extending in said ingot mold and horizontally spaced from said inside surfaces at said central portions by a larger distance than at said outer portions, all of said electrode means being movable with respect to said mold.
  • said inside surfaces define a rectangular horizontal cross-section and said electrode means comprise an inner electrode which is rectangular in horizontal cross-section and disposed between said central portions and two outer electrodes which are trapezoidal and taper inwardly in horizontal cross-section and disposed on opposite sides of said inner electrode.
  • said inside surfaces define a rectangular horizontal cross-section and said electrode means comprise an inner electrode which is rectangular in cross-section and disposed adjacent to said central portions and two outer electrodes which have a larger horizontal thickness than and are disposed on opposite sides of said inner electrode.
  • trodes which are trapezoidally shaped and inwardly tapered in horizontal cross-section.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Continuous Casting (AREA)
  • Furnace Details (AREA)
US00247576A 1971-08-30 1972-04-26 Arrangement for use in making slab ingots by electric slag-refining Expired - Lifetime US3835915A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2143302A DE2143302C2 (de) 1971-08-30 1971-08-30 Verwendung einer Abschmelzelektrodenanordnung bei der Herstellung von Brammenblöcken nach dem Elektro-Schlacke-Umschmelzverfahren

Publications (1)

Publication Number Publication Date
US3835915A true US3835915A (en) 1974-09-17

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US00247576A Expired - Lifetime US3835915A (en) 1971-08-30 1972-04-26 Arrangement for use in making slab ingots by electric slag-refining

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US (1) US3835915A (enrdf_load_stackoverflow)
JP (1) JPS5030017B2 (enrdf_load_stackoverflow)
AT (1) AT316029B (enrdf_load_stackoverflow)
DE (1) DE2143302C2 (enrdf_load_stackoverflow)
FR (1) FR2150896B1 (enrdf_load_stackoverflow)
GB (1) GB1343237A (enrdf_load_stackoverflow)
IT (1) IT962267B (enrdf_load_stackoverflow)
SE (1) SE379550B (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5223933A (en) * 1975-08-19 1977-02-23 Fuji Photo Film Co Ltd Silver halide color photographic light sensitive material
JPS52152722A (en) * 1976-06-15 1977-12-19 Mitsubishi Paper Mills Ltd Silver halide color photographic photosensitive material
JPS544125A (en) * 1977-06-11 1979-01-12 Mitsubishi Paper Mills Ltd Multilayer photosensitive material for color photography
JPS54118246A (en) * 1978-03-06 1979-09-13 Oriental Photo Ind Co Ltd Color photographic lightsensitive material
JPS5723057Y2 (enrdf_load_stackoverflow) * 1979-11-27 1982-05-19
JPS5687040A (en) * 1979-12-18 1981-07-15 Oriental Shashin Kogyo Kk Color photographic material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620287A (en) * 1970-06-03 1971-11-16 Boris Izrailevich Medovar Method of producing ingots, in particular, slab ingots, by electroslag remelting of consumable electrodes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620287A (en) * 1970-06-03 1971-11-16 Boris Izrailevich Medovar Method of producing ingots, in particular, slab ingots, by electroslag remelting of consumable electrodes

Also Published As

Publication number Publication date
GB1343237A (en) 1974-01-10
AT316029B (de) 1974-06-25
JPS5030017B2 (enrdf_load_stackoverflow) 1975-09-27
DE2143302C2 (de) 1979-04-19
JPS4832727A (enrdf_load_stackoverflow) 1973-05-02
FR2150896B1 (enrdf_load_stackoverflow) 1978-03-03
DE2143302A1 (enrdf_load_stackoverflow) 1973-03-15
FR2150896A1 (enrdf_load_stackoverflow) 1973-04-13
DE2143302B1 (de) 1973-03-15
SE379550B (enrdf_load_stackoverflow) 1975-10-13
IT962267B (it) 1973-12-20

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