US3357692A - Device for feeding additional materials into a stream of molten metals - Google Patents

Device for feeding additional materials into a stream of molten metals Download PDF

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Publication number
US3357692A
US3357692A US401612A US40161264A US3357692A US 3357692 A US3357692 A US 3357692A US 401612 A US401612 A US 401612A US 40161264 A US40161264 A US 40161264A US 3357692 A US3357692 A US 3357692A
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US
United States
Prior art keywords
stream
orifice
molten metals
outlet channel
feeding chute
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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
US401612A
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English (en)
Inventor
Bakkerus Hermanus
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Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Original Assignee
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
    • C21C7/0043—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material into the falling stream of molten metal
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00

Definitions

  • ABSTRACT F THE DSCLOSURE A device for feeding additives into a stream of molten metals in which there is a mouthpiece in the bottom of the storage chamber for the melt.
  • the mouthpiece includes an outlet channel having a transverse cross section which gradually decreases toward the outlet, and a cylindrical feeding chute is mounted concentrically within the outlet.
  • This invention relates to a device for feeding additive materials into a stream of molten metals, which additive materials have lower boiling points and/ or specific weights than the molten metals. More particularly, the invention is concerned with such a device for feeding magnesium or preliminary alloys thereof into a stream of molten iron for the preparation of nodular cast iron.
  • magnesium and its allied metals present many problems, particularly so, because magnesium, for instance, will melt at 650 C. and will boil at 1120" C.
  • the additive material(s) may be placed on the bottom of a -ladle and the liquid metal may be poured on to it (them).
  • the additional material may be introduced by means of an immersion body, it may be thrown vigorously on to the bath by means of a rapidly revolving paddle wheel or it may be strewn on the bath surface and stirred in very intensively.
  • the feeding in may be effected, while filling a ladle by dropping the additional material from a great height on to a stream of molten metals, or by adding it gradually on or in the stream.
  • a ⁇ device for adding aluminium to pigiron which is formed by a chamber which is closed at the top and is to be heated by a burner.
  • This chamber is provided at its side with a supply pipe with a syphon for maintaining a constant and calm level on the bottom of the chamber.
  • a central drainage channel In the bottom, there is an overflow provided about a central drainage channel, the inlet portion of which has a gradually narrowing transverse cross-section and the bottom of which shows a widened orifice.
  • a collector vessel having a discharge pipe at its side. This collector vessel is also closed on all sides and can be heated by a burner.
  • a feeding chute for the additional material is provided through the cover of the chamber, which chute is coaxial to the drainage channel and reaches up to the overflow.
  • the molten mass is supplied through the syphon in order to ensure that there will always issue a hollow, free-falling tubed stream from the drainage channel.
  • the additional material is supplied from the feeding chute as a free falling, independent core stream, which is not united to the tubed stream until far below the orifice of the drainage channel, substantially at the height of the bath level in the collector Vessel.
  • a device for adding lead to iron alloys is mounted on a steel ladle having a bottom provided with a drainage channel which can be closed by a stop rod.
  • the device is formed by a storage container for the additional material(s), which is connected with a bore of the stop rod, which passes into a cylindrical chute extending into the drainage channel.
  • the stop rod can seal on a conical seat in the drainage channel, or in a lifted position it can let a ring-like tubular stream of liquid metal flow into the further cylindrical part of the drainage channel, whereby a core stream of additional material can be fed through the chute.
  • the feeding chute By making the feeding chute of heat-resistant and insulating material and providing the stop rod at the upper side with a closing device, or by maintaining a high pressure in the bore of the feeding chute with the aid of gas or air, penetration by the molten mass of metal from the tubular stream intothe feeding chute, there to form a lump of frozen fast sintered metal which obstructs the further supply of additional material, may be avoided.
  • the object of this invention is to provide a device which is of course free from the drawbacks referred to and which is perfectly reliable and will remain so for a long time.
  • a mouth piece comprising an outlet channel having transverse cross-sections gradually decreasing towards the oritice and which has substantially no cylindrical part, and mounted concentrically within this outlet channel a cylindrical feeding chute for the additional material, the prefrably bevelled lower rim of the said chute-projecting from under the orifice of the outlet channel.
  • the lower rim projects by more than a quarter of the diameter of the orifice of the outlet channel and the diameter of this lower rim is about one half of the diameter of the orifice.
  • the feeding chute is preferably suspended so as to be readjustable, so that its lower rim can always be brought back to or be maintained at the right height to keep up with progressive wear.
  • a mouth piece 2 of graphite is provided in the bottom 1 of a storage chamber to which the mass of molten metal is Iadded.
  • the mouth piece block 2 is provided with an outlet or drainage channel 3, the transverse cross-section of which gradually and progressively narrows toward and up to its lower end, so that it is substantially without a cylindrical part.
  • a feeding chute 4 of graphite is mounted concentrically in the outlet channel 3 with the aid of a carrier 5 of graphite, which is centered in upstanding projections 6 of the block 2. Between the projections 6 and the carrier 5 there are formed gates 7, through which the melt from the storage chamber can enter the drainage channel 3.
  • the feeding chute 4 extends through the orifice 8 of the drainage channel 3 and the lower rim 9 of the feeding chute extends beyond the orifice 8 over a length, which is about equal to one third of the diameter of t-he said orifice, that is into the free-falling and freely contracting stream 10 of liquid metal of the melt. Towards its lower end, the feeding chute 4 narrows from the outside and widens from the inside, and the diameter of the lower rim 9 then is about half the diameter of the orifice 8.
  • the additional material falls into the feeding chute, 4 which can be kept at the right height with the aid of a heavy clamping holder 12 provided about the feeding chute 4 and which is thereby at the same time safeguarded against rising. Moreover, with the aid of this clamp it is possible to control the length of the projecting piece of the chute, by adjusting it to a higher or lower position.
  • a conical cavity 13 is created under the lower rim 9 in the freely contracting tubular stream 10, in which cavity the falling particles of additional material 14 are caught before they are taken up into the stream 10 which has then become one massive whole. Up to the cavity 13, the additional material is free from t-he direct radiation of the melt and remains cool.
  • a device for feeding additive materials into a stream of the molten metals, which additive materials have lower boiling points or lower specic weights or both than the molten metals said device comprising, in combination:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US401612A 1963-10-15 1964-10-05 Device for feeding additional materials into a stream of molten metals Expired - Lifetime US3357692A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL299266 1963-10-15

Publications (1)

Publication Number Publication Date
US3357692A true US3357692A (en) 1967-12-12

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ID=19755132

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US401612A Expired - Lifetime US3357692A (en) 1963-10-15 1964-10-05 Device for feeding additional materials into a stream of molten metals
US660795A Expired - Lifetime US3514285A (en) 1963-10-15 1967-08-15 Method for feeding additive materials into a stream of molten metals

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US660795A Expired - Lifetime US3514285A (en) 1963-10-15 1967-08-15 Method for feeding additive materials into a stream of molten metals

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US (2) US3357692A (en))
AT (1) AT259605B (en))
BE (1) BE654357A (en))
CH (1) CH439359A (en))
DE (1) DE1911559U (en))
DK (1) DK116453B (en))
ES (2) ES305141A1 (en))
GB (1) GB1013077A (en))
LU (1) LU47081A1 (en))
NL (1) NL299266A (en))
NO (1) NO115080B (en))

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650516A (en) * 1970-03-25 1972-03-21 Rheinstahl Huettenwerke Ag Device for introducing additives into molten metal
US4135920A (en) * 1976-07-06 1979-01-23 Barbakadze Dzhondo F Method of introducing powdered material into molten metal
US4420031A (en) * 1977-06-08 1983-12-13 Sven Eketorp Method of casting metal including disintegration of molten metal
US4520861A (en) * 1983-11-18 1985-06-04 Republic Steel Corporation Method and apparatus for alloying continuously cast steel products

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1278265A (en) * 1968-07-17 1972-06-21 Materials & Methods Ltd Improved process for the manufacture of nodular cast iron
US3753694A (en) * 1970-07-06 1973-08-21 Int Nickel Co Production of composite metallic articles
FR2139992B1 (en)) * 1971-05-28 1977-12-23 Rheinstahl Huettenwerke Ag
US3837842A (en) * 1971-08-02 1974-09-24 Sumitomo Metal Ind A method for projecting pieces of a deoxidizing agent into molten steel
DE2554782C3 (de) * 1975-12-05 1983-04-07 Caspers, Karl-Heinz, 8500 Nürnberg Verfahren und Vorrichtung zur Impfbehandlung von Gußeisenschmelzen
IT1116425B (it) * 1977-04-18 1986-02-10 Centro Speriment Metallurg Sistema di raffreddamento e alligazione della massa fusa nella colata continua dell'acciaio
DE2807527C3 (de) * 1978-02-22 1980-09-11 Goetze Ag, 5093 Burscheid Verfahren zum Impfen oder Veredeln von Metallschmelzen
US4232854A (en) * 1978-05-26 1980-11-11 Barbakadze Dzhondo F Method of introducing powdered reagents into molten metals and apparatus for effecting same
CH662129A5 (de) * 1984-08-08 1987-09-15 Fischer Ag Georg Verfahren und vorrichtung zum einbringen von zusatzstoffen, insbesondere impfmittel, in ein metallbad.
CH665851A5 (de) * 1986-03-20 1988-06-15 Fischer Ag Georg Verfahren zur herstellung von perlitischen gusseisensorten.
IT1278916B1 (it) * 1995-01-05 1997-11-28 Benet Di Bennati Ettore Metodo ed apparecchiatura per il trattamento di bagni metallici con materiali di reazione a basso o alto sviluppo di gas
DE19637282C1 (de) * 1996-09-13 1998-05-20 Elektro Thermit Gmbh Verfahren zum aluminothermischen Zwischengußschweißen von Schienen mit Auflegierung des Stahlgusses im Schienenkopfbereich
US5887646A (en) * 1997-01-16 1999-03-30 Ford Global Technologies, Inc. Modular sand mold system for metal treatment and casting

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707718A (en) * 1948-05-26 1955-05-03 Ajax Engineering Corp Induction pump for casting molten metals
US2994460A (en) * 1959-06-24 1961-08-01 Max A Matthews Blending hopper
US3214804A (en) * 1963-03-18 1965-11-02 Allegheny Ludlum Steel Ladles
US3272619A (en) * 1963-07-23 1966-09-13 Metal Pumping Services Inc Apparatus and process for adding solids to a liquid

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2260226A (en) * 1940-12-31 1941-10-21 Mechanite Metal Corp Method and means for introducing alloying material
US2574764A (en) * 1949-10-06 1951-11-13 Meehanite Metal Corp Process for the incorporation of additives into molten metal
US2677609A (en) * 1950-08-15 1954-05-04 Meehanite Metal Corp Method and apparatus for metallurgical alloy additions
US2663635A (en) * 1950-11-27 1953-12-22 Int Nickel Co Addition agent and method for introducing magnesium into cast iron
US3001864A (en) * 1952-12-09 1961-09-26 Air Reduction Method for introducing solid materials into molten metal
US3210183A (en) * 1962-01-15 1965-10-05 Res Inst Iron Steel Method of manufacturing nodular graphite-cast steel and-cast iron having excellent castability

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707718A (en) * 1948-05-26 1955-05-03 Ajax Engineering Corp Induction pump for casting molten metals
US2994460A (en) * 1959-06-24 1961-08-01 Max A Matthews Blending hopper
US3214804A (en) * 1963-03-18 1965-11-02 Allegheny Ludlum Steel Ladles
US3272619A (en) * 1963-07-23 1966-09-13 Metal Pumping Services Inc Apparatus and process for adding solids to a liquid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650516A (en) * 1970-03-25 1972-03-21 Rheinstahl Huettenwerke Ag Device for introducing additives into molten metal
US4135920A (en) * 1976-07-06 1979-01-23 Barbakadze Dzhondo F Method of introducing powdered material into molten metal
US4420031A (en) * 1977-06-08 1983-12-13 Sven Eketorp Method of casting metal including disintegration of molten metal
US4520861A (en) * 1983-11-18 1985-06-04 Republic Steel Corporation Method and apparatus for alloying continuously cast steel products

Also Published As

Publication number Publication date
ES305141A1 (es) 1965-05-01
GB1013077A (en) 1965-12-15
NO115080B (en)) 1968-07-22
DE1433594A1 (de) 1968-11-21
DE1911559U (de) 1965-03-11
BE654357A (en)) 1965-04-14
ES309214A1 (es) 1965-05-16
CH439359A (de) 1967-07-15
AT259605B (de) 1968-01-25
DK116453B (da) 1970-01-12
LU47081A1 (en)) 1964-12-05
NL299266A (en))
US3514285A (en) 1970-05-26

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