US3785784A - Scrap blocks for electric furnaces - Google Patents

Scrap blocks for electric furnaces Download PDF

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Publication number
US3785784A
US3785784A US00601034A US60103466A US3785784A US 3785784 A US3785784 A US 3785784A US 00601034 A US00601034 A US 00601034A US 60103466 A US60103466 A US 60103466A US 3785784 A US3785784 A US 3785784A
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US
United States
Prior art keywords
block
grooves
metal scrap
center
diameter
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
US00601034A
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English (en)
Inventor
K Tezuka
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.)
Individual
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Individual
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
Priority claimed from JP5963266A external-priority patent/JPS4817976B1/ja
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3785784A publication Critical patent/US3785784A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/32—Presses specially adapted for particular purposes for consolidating scrap metal or for compacting used cars
    • B30B9/328—Presses specially adapted for particular purposes for consolidating scrap metal or for compacting used cars for making furnace charges
    • 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
    • Y02P10/20—Recycling
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12188—All metal or with adjacent metals having marginal feature for indexing or weakened portion for severing
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12222—Shaped configuration for melting [e.g., package, etc.]
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12229—Intermediate article [e.g., blank, etc.]
    • Y10T428/12271—Intermediate article [e.g., blank, etc.] having discrete fastener, marginal fastening, taper, or end structure
    • Y10T428/12285—Single taper [e.g., ingot, etc.]
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12382—Defined configuration of both thickness and nonthickness surface or angle therebetween [e.g., rounded corners, etc.]

Definitions

  • the present invention relates to improvements in scrap blocks of iron and the like to be melted in an electric furnace.
  • a conventional press machine for shaping metal scrap blocks is composed principally of a hollow, cylindrical press casing and pressing means, and scrap blocks shaped up thereby are solid and cylindrical.
  • An ordinary electric furnace generally in use, is provided with a hollow and cylindrical furnace and a plurality of electrodes to be inserted into said furnace, so that melting of scraps may be carried out by bringing said electrodes into contact with the upper ends of said charged blocks. Therefore, in the melting of said blocks with electric furnace, the central, axial portion of said blocks is relatively easily melted but the outer peripheral portion thereof tends to remain unmelted in a hollow, cylindrical form.
  • said unmelted portion is cut into several pieces by gas cutters or the like; said pieces are dropped down into the molten metal on the furnace bottom; and then the melting is again carried out. Since the cutting work is performed near the high-temperature furnace it is very dangerous for the workers; also, it is a waste of labor to do the cutting and, moreover, it consumes a great deal of oxygen. Otherwise, in the conventional furnaces, there is a thought to the effect that it should be desirable to provide more electrodes to use also in the positions corresponding to said unmelted portions. However, it is not only difficult in respect to the construction and also undesirable for the safety of the furnace walls to provide more electrode rods near the inner wall of the furnace,; in addition, it is extremely uneconomical of power consumption to increase the number of electrode rods.
  • the object of this invention is to provide a method of making metal scrap blocks which can be completely melted in electric furnaces efficiently as well as economically and without requiring cutting work such as mentioned above.
  • Metal scrap blocks according to this invention are solid and substantially cylindrical, having parallel slots formed on the outer periphery thereof in the direction of the ge neratrixes. Said blocks will be completely melted, in the melting'process by electric furnace, efficiently and economically on account of the provision of these slots.
  • slots will be suitably designed to make effective the delivery, melting, etc. of blocks; it is particularly desir able to determine the depth of slots at about A to Va of the diameter of said blocks and said cross-sectional shape as trapezoidal, square, triangular, semicircular or in any other form.
  • FIG. 1 is an oblique view of a metal scrap block
  • FIG. 2 is a frontal view of a press machine showing a vertically-sectional view of its casing and pressing means;
  • FIG. 3 is a-plane view of the casing
  • FIG. 4 is a bottom view of the pressing means
  • FIG. 5 is a partial plane view of another embodiment of the casing
  • FIG. 6 is a partial plane view of another embodiment of the casing.
  • FIG. 7 is a schematic figure for illustrating the melt ing in an electric furnace.
  • scrap block 1 as shown in PK]. 1 is solid and substantially cylindrical, made with iron scraps pressed and thus shaped, its outer pe' riphery having four slots 2 whose cross-sectional shape is trapezoidal, formed at equal intervals and in parallel to each other in the direction of the generatrixes and extending from the one end 3 to the other end 4; the depth in the diametrical direction of said slots 2 is about 1/5 of the diameter of said block I.
  • said block 1 is completely melted in electric furnace efficiently as well as economically as the following description will clarify.
  • said block 1 is inserted into an electric furnace P with its end 3 facing upward; electrode rods E are inserted into the furnace from above and the lower rod ends are brought down upon the upper end 3 of said block 1. Utilizing the requisite electric current, the melting is started.
  • axial portion of said block first begins to melt and the molten metal thereof gathers in the furnace bottom, said axial portion lying in the direction of extension of said electrode rods. Said melting further develops gradually and outwardly to reach said slots 2 eventually, whereupon the outer peripheral portion of the block which has hitherto tended to remain unmelted in a hollow and cylindrical shape, separates into into four pieces C along said slots 2, each of said pieces C then slipping down by its own weight into the molten metal on the bottom where it is naturally all melted.
  • Th s as rhaiiii Efiihbfifisiofsi bisaid"blacks is within the range of about A to Vs of the diameter of block will affect said melting and other processes very favorably, because, if said depth is too small, it will make difficult the separation into pieces of the unmelted portion of said blocks, thus obstructing the efficient, economical and complete melting of the blocks; if said depth is too great, on the other hand, it will make the blocks too easily breakable, thus decreasing the operational efficiency inldelivery and transfer of blocks.
  • the press machine is composedmainly of a press casing and pressing means.
  • the press casing 5 whose one end is entirely open is steelmade and substantially cylindrical, having its inner surface 6 welded with four ridged steel male dies 7 at equal intervals in parallel to each other in the direction of the generatrixes from the casing opening 8 to the bottom 9.
  • the number, diametrical height of ridges, cross-sectional shape, etc. of said male dies 7 should be suitably determined with a view to making effective the pressing, removal of blocks out of the casing, melting, etc.
  • Saidridge height in particular, is about 1/5 of the and a large gear 19 secured to the top of said press disk.
  • the crosssectional shape thereof is trapezoidal in the above example but any other form such as square, triangular, semicircular shapes may be adopted.
  • pressing members of the present device those which are conventionally known to the public or other variety which can be thought of in the future may be as well freely utilized with this invention, but the examples herein shown have adopted pressing members which comprise a number of spot press rams moved by a fluid pressure cylinder such as oil-pressure or hydraulic cyll inder and a rotary press disk having a concavo-convex part on its pressing face.
  • a fluid pressure cylinder such as oil-pressure or hydraulic cyll inder
  • rotary press disk having a concavo-convex part on its pressing face.
  • two oil-pressure cylinders 12 for elevating the rotary press disk 11 are borne vertically by a beam of a gate-type frame F and the lower ends of the rams 13 of said cylinders are secured to a supporting block 14.
  • the convex part 15 of said press disk 11 is shaped in a cross, the shaft 16 standing on said press disk being rotatably and suspendedly borne with bearing.
  • a motor 17 for rotating said press disk is mounted to said supporting block 14, and the rotation of the motor is transmitted to the press disk 11 by way of a pinion 18 of the drive shaft of the motor
  • Four oil-pressure cylinders 21 for lowering all the spot press rams to the pressing position are borne also by said beam 10.
  • each ram 22 is secured to an annular supporting member 23, on which a number of oil-pressure cylinders 24 for the spot rams are supported vertically.
  • the spot ram 20 of each cylinder 24 penetrates, as is so adapted, the supporting ring slidably so as to be able to move back and forth from the underside of the ring.
  • each leg 25 has, on its inside, slots 26 formed as extending from the underside of the ring, said slots being so adapted as to fit into each male die 7 of said casing when pressing is effected.
  • said supporting ring 23 is devised so as to have its outer diameter made just large enough to be insertable into said casing 5
  • said press disk 11 is devised so as to have its diameter made also just large enough to be insertable into said casing without touching the male die 7.
  • the fact that the ridge height of said male die is about V1 to b of the inner diameter of said casing is desirable in shaping specified blocks.
  • the ridge height is too high, easily breakable blocks will be shaped up disadvantageously, in addition to its becoming an obstacle in the pressing; if the ridge height is too low, it will be impossible to shape blocks which are able to be completely melted efficiently as well as economically.
  • a male die 7a is fitted between said opposing projections with its base, circumferentially shifting thereof will be hampered advantageously by said supporting means; there will be no occurrence of any obstruction in the scrap charging and also in the pressing operation but the same object as the foregoing example will be achieved.
  • supporting means there can be employed a variety of means such as means for fixing male dies to the casing with screws.
  • male dies 7a manufacturing of other material such as wood that is combustible at a temperature lower than the melting point of metal scraps.
  • the male die 7d which is made of wood and has clung to a block such as mentioned abovejthe male die may either be removed off the block and again used, or
  • a metal scrap block for use in an electric furnace said block consisting of at least substantially compacted metal scraps having in cross-section a substantially cylindrical portion and a substantially conical portion converging gradually in a direction towards one axial end of said block, provided with a plurality of circumferentially spaced axial grooves extending from the periphery of said block at least substantially radially inwardly towards but short of a center portion of said block, said center portion being substantially solid,- said grooves having a length approaching that of said block, so that, when said block is melted from the center in radially outward direction, the grooved annular outer portion of the block separates along the respective grooves into segments which collapse radially inwardly.
  • said block has a predetermined diameter, and wherein said grooves have a depth which corresponds to between substantially and A of said predetermined diameter.
  • said grooves approaching the length of said block and being dimensioned so that, when said block is disposed in the melting chamber of an electric furnace and melting electrodes are advanced in said chamber axially of said block toward said center portion so as to melt the same and in so doing to enter into and hollow out said block,
  • the remaining unmelted outer annular portion of the block in which said grooves are provided will separate along the inner boundaries of the respective grooves into individual segments which will collapse under their own weight in radially inward direction so as to come within the melting effectiveness range of said electrodes to be melted by the same.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Press Drives And Press Lines (AREA)
US00601034A 1966-09-03 1966-12-12 Scrap blocks for electric furnaces Expired - Lifetime US3785784A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP5794466 1966-09-03
JP5963266A JPS4817976B1 (de) 1966-09-10 1966-09-10
JP6431566 1966-09-30

Publications (1)

Publication Number Publication Date
US3785784A true US3785784A (en) 1974-01-15

Family

ID=27296437

Family Applications (1)

Application Number Title Priority Date Filing Date
US00601034A Expired - Lifetime US3785784A (en) 1966-09-03 1966-12-12 Scrap blocks for electric furnaces

Country Status (14)

Country Link
US (1) US3785784A (de)
AT (1) AT275284B (de)
BE (1) BE692719A (de)
CH (2) CH463961A (de)
DE (2) DE1577271C3 (de)
DK (2) DK111194B (de)
ES (1) ES335677A1 (de)
FI (1) FI46977C (de)
FR (1) FR1510224A (de)
GB (1) GB1122607A (de)
LU (1) LU52835A1 (de)
NL (1) NL6702482A (de)
NO (1) NO119207B (de)
SE (2) SE311796B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6521177B1 (en) 2000-03-29 2003-02-18 Galt Alloys, Inc. Process for compounding titanium alloys
US20030066387A1 (en) * 2001-10-10 2003-04-10 Stebbing Franklin Leroy Method of melting a mixture of scrap metal using scrap rubber
US20050229743A1 (en) * 2004-04-20 2005-10-20 Accelerated Technologies Corporation Methods of using tires and scrap rubber in the manufacture and melting of steel and other metals

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1113941B (it) * 1979-05-03 1986-01-27 Vezzani Spa Off Procedimento e pressa per il caricamento di rottame metallico in forni di fusione
EP0178802B1 (de) * 1984-10-02 1988-07-13 Ngk Insulators, Ltd. Vorrichtung zur Verdichtung und Volumensverminderung
DE19538608C2 (de) * 1995-10-18 2001-09-20 Max Aicher Verfahren zum Erschmelzen von Schrott

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6521177B1 (en) 2000-03-29 2003-02-18 Galt Alloys, Inc. Process for compounding titanium alloys
US20030066387A1 (en) * 2001-10-10 2003-04-10 Stebbing Franklin Leroy Method of melting a mixture of scrap metal using scrap rubber
US20050229743A1 (en) * 2004-04-20 2005-10-20 Accelerated Technologies Corporation Methods of using tires and scrap rubber in the manufacture and melting of steel and other metals
US7393379B2 (en) 2004-04-20 2008-07-01 Franklin Leroy Stebbing Methods of using tires and scrap rubber in the manufacture and melting of steel and other metals
US20080257105A1 (en) * 2004-04-20 2008-10-23 Rex Enterprises, Llc Methods of Using Tires and Scrap Rubber in the Manufacture and Melting of Steel and Other Metals
US7553351B2 (en) 2004-04-20 2009-06-30 Franklin Leroy Stebbing Methods of using tires and scrap rubber in the manufacture and melting of steel and other metals
US20090255374A1 (en) * 2004-04-20 2009-10-15 Rex Enterprices, Llc Methods of Using Tires and Scrap Rubber in the Manufacture and Melting of Steel and Other Metals
US7674317B2 (en) 2004-04-20 2010-03-09 Franklin Leroy Stebbing Methods of using tires and scrap rubber in the manufacture and melting of steel and other metals
US20100154592A1 (en) * 2004-04-20 2010-06-24 Rex Enterprises, Llc Methods of Using Tires and Scrap Rubber in the Manufacture and Melting of Steel and Other Metals
US7883566B2 (en) 2004-04-20 2011-02-08 Rex Enterprises, Llc Methods of using tires and scrap rubber in the manufacture and melting of steel and other metals
US20110126671A1 (en) * 2004-04-20 2011-06-02 Rex Enterprises, Llc Methods of Using Tires and Scrap Rubber in the Manufacture and Melting of Steel and Other Metals
US8152894B2 (en) 2004-04-20 2012-04-10 Franklin Leroy Stebbing Methods of using tires and scrap rubber in the manufacture and melting of steel and other metals
US8470069B2 (en) 2004-04-20 2013-06-25 Franklin Leroy Stebbing Methods of using tires and scrap rubber in the manufacture and melting of steel and other metals

Also Published As

Publication number Publication date
NL6702482A (de) 1968-03-04
GB1122607A (en) 1968-08-07
DE1577271A1 (de) 1970-04-30
FI46977B (de) 1973-05-02
FR1510224A (fr) 1968-01-19
DE1508092B1 (de) 1970-08-27
DE1577271C3 (de) 1976-01-08
SE311796B (de) 1969-06-23
DK117366B (da) 1970-04-20
NO119207B (de) 1970-04-06
SE303304B (de) 1968-08-26
DK111194B (da) 1968-06-24
DE1577271B2 (de) 1975-04-30
ES335677A1 (es) 1968-03-16
LU52835A1 (de) 1967-07-18
CH463961A (fr) 1968-10-15
FI46977C (fi) 1973-08-10
BE692719A (de) 1967-07-17
AT275284B (de) 1969-10-27
CH462864A (fr) 1968-09-30

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