US2668048A - Foundry cupola - Google Patents

Foundry cupola Download PDF

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Publication number
US2668048A
US2668048A US191955A US19195550A US2668048A US 2668048 A US2668048 A US 2668048A US 191955 A US191955 A US 191955A US 19195550 A US19195550 A US 19195550A US 2668048 A US2668048 A US 2668048A
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United States
Prior art keywords
cupola
tuyeres
airbox
air
tuyres
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
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US191955A
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English (en)
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Ronceray Robert Andre Marcel
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Individual
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Individual
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Publication date
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Publication of US2668048A publication Critical patent/US2668048A/en
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Classifications

    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/08—Shaft or like vertical or substantially vertical furnaces heated otherwise than by solid fuel mixed with charge

Definitions

  • the lining of the latter melts and its meltedparticles dripdown, along the cupola walls, until they reach the tuyre level where, by being air-cooled, they are solidified, giving rise to depositsmorea or less obstructing the tuyeres.
  • the air pressure is not equal in all of them and is, in fact, higher in the tuyres lying in proximity to the airadmitting duct than the tuyres diametrally opposedto these ducts. Every tuyere, therefore, discharges a difierent amount of air, so that in, the cupola there occur regions in which the melting is not being carried out under desirable conditions.
  • the present invention has for its object to provide improvements in the foundry cupolas, which permit of obtaining the automatic removal of tuyere deposits, the equality of air pressure in the tuyeres, with reduced losses of head, a smaller wear of the cupola facing, and a heating of the air employed.
  • the cupola is provided with two independent sets of tuyres, and includes self-acting means whereby each set of tuyres may be set in action alternately.
  • the cleaning of the tuyres is then eiiected' regularly and entirely automatically.
  • the air supply is uniform andhence the quality of melted products is regular.
  • each group of tuyres' can be timed by the head melter and the crews therefor do not have to intervene whereby their fatigue is minimized and the operation of the cupola is even and regular at all times.
  • the various tuyeres are converging According to a further improvement, which.
  • the air box is located at a level different fromthat of the tuyeres and is connected to the latter by a subdivided jacket surrounding the cupola.
  • the air pressure is practically equal in all of the tuyeres and the losses of head are rendered low by the large dimensions given to. the connecting ducts.
  • the air that circulates within the jacket throughout the height of the melting region, is warmed up by cooling this region as well as the lining of the latter. Wear of this lining is thereby substantially reduced, for the temperature of the same is about equal to its melting point,.when the cupola is in operation.
  • Fig. 1 is a vertical showing of the cupola, half in elevation and half in section;
  • Fig. 2 is a cross-section through the line II-II of Fig. 1;
  • Fig. 3 is a cross-section through the line IIIl1I of Fig. 1;
  • Fig. 4 is a detail view showing the distribution shutter.
  • the cupola l whose lining is denoted by reference 2, is provided with an air box 3 connected to the air supply duct 4 and divided into two portions by a transversal partition 5.
  • a shutter 6
  • the shutter 6 is connected to a, piston 1 slidable in a double-acting cylinder 8. Compressed air may be sent into one or the other cylinder end throu h the intermediary of a valve 9 actuated by an adjustable clockwork I0.
  • a jacket H made of welded sheet metal, surrounds the cupola below the air box 3 and is provided with partitions such as I2 adapted to define compartments such as 13.
  • partitions such as I2 adapted to define compartments such as 13.
  • One of every two of these compartments communicates with the upper portion of th -air box through apertures such as 14 formed in the partition 5, while the other compartments communicate with the lower portion of this box through apertures such as l5 formed in the bottom of said box.
  • the compartments [3 communicate with radially extending tuyeres such as l6 equally spaced circumferentially of the cupola and each of which tuyres has a converging longitudinal cross section with the small end thereof opening on the inner wall of said cupola. Inspection doors such as I! are positioned in front of the tuyeres IS.
  • the clockwork I0 is for setting in operation alternately the tuyeres IS in communication with the upper portion of the air box 3 and the tuyeres in communication with the lower portion of this box.
  • the tuyeres which are thus caused to be out of action are brought to high temperature and their deposits melt away.
  • the air flowing into the jacket H is heated and its pressure is practically equal in all of the tuyeres in action.
  • the outlet [8 of the cupola opens into a decanting vat IS.
  • the iron slag which is lighter than iron rises to the surface and flows therefrom through an upper passage 20, while the iron collects in the bottom of the vat l9 and is withdrawn through a lower passage 2!.
  • the melted products obtained with such a cupola are of better quality than those obtained with the cupolas hitherto known, since the pouring temperature of the former is more regular.
  • the output of these Products varies within narrow limits. The melter does not have to busy himself about the cleanness of the tuyeres, and
  • An improvement in foundry cupolas comprising a cupola, an airbox surrounding the middle portion of said cupola, a partition extending transversely of and within said airbox and separating said box into two sections positioned one above the other, an air inlet duct connected to said airbox and in communication with both of said sections, a shutter slidably mounted between said duct and said airbox and having an opening capable of placing said duct in communication with one of said airbox sections at a time according to the position of said shutter, a pneumatic jack connected to said shutter for operatin the same, a clockwork mechanism operably connected to said jack for automatically operating same, a plurality of tuyeres provided through said cupola all on the same horizontal plane below said air box, a plurality of vertical conduits connecting alternate tuyres to one of said airbox sections, and a second plurality of vertical conduit connecting the remaining tuyres to the other of said airbox sections.
  • An improvement in foundry cupolas comprising a cupola, an airbox surrounding an upper portion of said cupola, a partition extending transversely of and within said airbox and separating said airbox into two sections positioned one above the other, an air inlet duct connected to said airbox and in communication with both of said sections, a shutter slidably mounted between said duct and said airbox and having an opening for placing said duct in communication with one of said airbox sections at a time according to the position of said shutter, a pneumatic jack connected to said shutter for operating the same, a clockwork mechanism operabl connected to said jack for automatically operating same, a plurality of tuyeres provided through said cupola all on the same horizontal plane below said airbox, a jacket enclosing the portion of said cupola extending from said airbox to and below said tuyeres, said airbox having an annular opening provided in the bottom thereof, said transverse partition having an annular series of openings provided therethrough, a plurality of partition

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US191955A 1950-09-25 1950-10-25 Foundry cupola Expired - Lifetime US2668048A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2668048X 1950-09-25

Publications (1)

Publication Number Publication Date
US2668048A true US2668048A (en) 1954-02-02

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US191955A Expired - Lifetime US2668048A (en) 1950-09-25 1950-10-25 Foundry cupola

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Country Link
US (1) US2668048A (xx)
BE (1) BE504488A (xx)
DE (1) DE903855C (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926903A (en) * 1957-01-29 1960-03-01 Strico Ges Fur Metallurg Und W Bustle pipe for blast furnaces

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1137172B (de) * 1957-01-29 1962-09-27 Strico Ges Fuer Metallurg In zwei Teilraeume unterteilter Windring mit Anschluessen zu den Windduesen eines Schachtofens
GB1069513A (en) * 1963-12-20 1967-05-17 Cossor Ltd A C Improvements in apparatus for electrically identifying one of a number of stations

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US491508A (en) * 1893-02-07 Latjme rollet
US1546521A (en) * 1924-02-05 1925-07-21 Vanderstein Ewald Cupola furnace
US1668133A (en) * 1926-06-02 1928-05-01 Weichel Otto Cupola furnace
US1683809A (en) * 1924-05-10 1928-09-11 Leeds & Northrup Co Control system
US2273902A (en) * 1940-09-30 1942-02-24 Meehanite Metal Corp Apparatus and method for preheating of air and the like by conduction
US2273903A (en) * 1940-11-01 1942-02-24 Meehanite Metal Corp Apparatus for uniformly heating air supplied to a furnace
US2295901A (en) * 1941-05-31 1942-09-15 Allen Overcash J Cupola
US2313769A (en) * 1941-12-17 1943-03-16 Herbert A Reece Apparatus and method for the control of air flow through furnace tuyeres
US2471775A (en) * 1947-03-24 1949-05-31 Herbert A Reece Apparatus for supplying air to cupola furnaces

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US491508A (en) * 1893-02-07 Latjme rollet
US1546521A (en) * 1924-02-05 1925-07-21 Vanderstein Ewald Cupola furnace
US1683809A (en) * 1924-05-10 1928-09-11 Leeds & Northrup Co Control system
US1668133A (en) * 1926-06-02 1928-05-01 Weichel Otto Cupola furnace
US2273902A (en) * 1940-09-30 1942-02-24 Meehanite Metal Corp Apparatus and method for preheating of air and the like by conduction
US2273903A (en) * 1940-11-01 1942-02-24 Meehanite Metal Corp Apparatus for uniformly heating air supplied to a furnace
US2295901A (en) * 1941-05-31 1942-09-15 Allen Overcash J Cupola
US2313769A (en) * 1941-12-17 1943-03-16 Herbert A Reece Apparatus and method for the control of air flow through furnace tuyeres
US2471775A (en) * 1947-03-24 1949-05-31 Herbert A Reece Apparatus for supplying air to cupola furnaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926903A (en) * 1957-01-29 1960-03-01 Strico Ges Fur Metallurg Und W Bustle pipe for blast furnaces

Also Published As

Publication number Publication date
BE504488A (xx)
DE903855C (de) 1954-02-11

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