US3623709A - Apparatus for charging and for distributing charges in shaft furnace - Google Patents

Apparatus for charging and for distributing charges in shaft furnace Download PDF

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Publication number
US3623709A
US3623709A US54677A US3623709DA US3623709A US 3623709 A US3623709 A US 3623709A US 54677 A US54677 A US 54677A US 3623709D A US3623709D A US 3623709DA US 3623709 A US3623709 A US 3623709A
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US
United States
Prior art keywords
bell
fluidtight
bells
envelope
small bell
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
US54677A
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English (en)
Inventor
Robert Dorville
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.)
DELATTRE LEVIVIER S I D L SOC
SOC INDUSTRIELLE DELATTRE-LEVIVIER SIDL
Original Assignee
DELATTRE LEVIVIER S I D L SOC
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
Application filed by DELATTRE LEVIVIER S I D L SOC filed Critical DELATTRE LEVIVIER S I D L SOC
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Publication of US3623709A publication Critical patent/US3623709A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements

Definitions

  • the rotary cone being in a fluidtight envelope which the nonrotatable small bell closes.
  • the small bells are coaxial and vertically displaceable.
  • the rotatable small bell can pass through a seal for the nonrotatable small bell and the envelope has a stop for arresting the cone.
  • PATENTEnuuvsolsn 1623709 SHEET 2 OF 2 FIG-.3
  • the invention relates to apparatus for charging and for distributing solid charges at the top of shaft furnaces in which the pressure is greater than atmospheric pressure. It relates more particularly to blast furnaces operating at high pressures in the throat.
  • the large bell which closes the bottom acts both as the sealing means and as the means for distributing the charges inside the shell.
  • These bells which are subject to wear from the materials and to abrasion by the gases, soon cease to provide a seal and must be replaced after a short time. Also, since they are suspended by means of a central rod, dismantling and replacement of the mechanisms takes a very long time.
  • Most conventional apparatus also has the disadvantage of requiring a large-diameter pressuretight rotary seal for the rotary cone of the small bell.
  • Particular objects of the invention are to permit the apparatus to operate with a lower bell which is not gastight, to facilitate the operation of replacing plant above the lower bell, and to make the seal between the rotary cone and the fixed element of the throat unnecessary.
  • the invention relates to apparatus for charging and for distributing charges in shaft furnaces having a fluidtight envelope above the furnace, a large bell providing a seal at the base of this envelope and distributing the charges in this furnace, a rotary cone situated above the large bell and closed at the bottom by a rotatable small bell, a lower small bell situated between the two preceding bells, means for opening the bells, and a device for charging the rotary cone, characterized in that the rotary cone is situated in a fluidtight shell closed at the bottom by the lower small bell, which is not rotatable, the rotatable small bell and the lower small hell are coaxial and are suspended from a device for producing vertical displacement, each of the small bells cooperates with a seat, the diameter of the rotatable small bell is less than that of the seat of the lower small bell, and the rotary cone and the fluidtight shell have cooperating bearing surfaces which stop the descent of the rotary cone.
  • F 1G. 1 represents a section through the vertical longitudinal axis of apparatus embodying the invention
  • FIG. 2 shows a section on a line ll-ll in F IG. 1;
  • FIG. 3 shows, on a larger scale, the suspension for the bells situated above the bell closing the bottom of the throat.
  • the apparatus comprises a charging chute 1 which can be closed by a gastight valve 2 and introduces the charges into a rotary cone or hopper 3, closed at the bottom by a bell 4 on which a seat 5 attached to the cone 3 bears.
  • the bell 4 is supported by way of a tube 6 on a rotary abutment 7 fixed to a rod 8, which supports a lower small bell 9.
  • the rod 8 is supported by a jack 10 or any other means providing sufficient force to urge the bell 9 on to a seat 11, and to support the dead weight of the fixed bell 9, hell 4 and cone 3 and of materials introduced into the cone.
  • a driving and reducing unit 12 transmits a rotary movement to a toothed ring 13, which rotates with the tube 6 and therefore with the bell 4 and the cone 3 supported by this bell.
  • Rollers l6 guide the rotary movement of the cone 3.
  • the jack l0 permits vertical displacement of the bell 9 and therefore of the bell 4, which is connected to the hell 9 in respect of vertical displacement by way of the abutment 7. During this vertical displacement the hell 9 is guided by guides 17.
  • the vertical stroke of the bells 4 and 9 is equal to the stroke of the jack 110; but the stroke of the seat 5 and therefore of the cone 3 is limited and equal to the distance between the seats 5 and 11.
  • the assembly formed of the bell 4, seat 5 and cone 3 is enclosed in a gastight envelope 1%, closed at the top by a fluidtight rotary seal 19 and fixed at the bottom to the seat 1 l.
  • the lower bell 20 is urged on to its seat 21 by way of jacks 22 fixed to an adjusting lifting beam 23.
  • the interior of the blast furnace is connected by pipes to the space 27 between the large bell 20 and the small hell 9.
  • Pipes 28 make it possible, by means of valves 29 and 30, either to equalize the pressures above and below the bell 9, or to bring the volume of gas enclosed in the shell 18 to atmospheric pressure.
  • valve 29 prevents the gas from passing into the shell 18; the valve 30 connects the shell 18 to the atmosphere.
  • the charges are introduced into the cone 3, which is rotated by the driving and reducing unit 12.
  • the bell 9 remains fixed and provides a seal for the pressurized gases; this bell therefore enables the large-diameter rotary seal required for conventional throats to be eliminated.
  • the rotational movement is stopped and simultaneously the valve 2 is closed and, by means of the clearance in the valves 29 and 30, the pressurized gas is introduced into the shell 18.
  • the bells 4 and 9 are lowered by means of the jack 10.
  • the cone 3 descends with the bell 4, but its downward movement ceases when the seat 5 rests on the seat 11 by way of cooperating bearing surfaces 31 and 32.
  • the bells 4 and 9 continue to descend, and the charge is introduced into the lower pressurized shell.
  • the assembly comprising the bell 9 and seat 11, which provides a gas seal, is not in contact with the materials and is therefore not subject to wear. Gastightness is therefore provided for a longer period.
  • the bells and cone are then hoisted back into their initial position by means of the jack 10.
  • the pressure in the shell 18 is reduced by means of the valves 29 and 30, the valve 2 is opened, and the cone 3 is rotated and is ready to receive the next charge.
  • this bell When enough material is present above the large bell, this bell is opened by means of the jacks 22. The materials are introduced into the blast furnace, and the large bell is closed.
  • Apparatus for charging and for distributing charges in shaft furnaces having a fluidtight envelope above the furnace, a large bell providing a sea] at the base of this envelope and distributing the charges in the furnace, a rotary cone situated above the large bell and closed at the bottom by a rotatable small bell, a lower small bell situated between the two preceding bells, means for opening the bells, and a device for charging the rotary cone, characterized in that the rotary cone is situated in a fluidtight shell closed at the bottom by the lower small bell, which is not rotatable, the rotatable small bell and the lower small bell are coaxial and are suspended from a device for producing vertical displacement, each of the small bells cooperates with a seat, the diameter of the rotatable small bell is less than that of the seat of the lower small bell, and the rotary cone and the fluidtight shell have cooperating bearing surfaces which stop the descent of the rotary cone.
  • Apparatus as claimed in claim 1 characterized in that the large bell is suspended from a device for producing vertical displacement, this device being in the form of an adjusting lifting beam extending transversely within the fluidtight envelope and connected to jacks.
  • Apparatus as claimed in claim 1 characterized in that ducts connect the fluidtight envelope to the fluidtight shell and the latter to the atmosphere, and these ducts include 5 isolating valves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
US54677A 1969-08-22 1970-07-14 Apparatus for charging and for distributing charges in shaft furnace Expired - Lifetime US3623709A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6928827A FR2057488A5 (de) 1969-08-22 1969-08-22

Publications (1)

Publication Number Publication Date
US3623709A true US3623709A (en) 1971-11-30

Family

ID=9039299

Family Applications (1)

Application Number Title Priority Date Filing Date
US54677A Expired - Lifetime US3623709A (en) 1969-08-22 1970-07-14 Apparatus for charging and for distributing charges in shaft furnace

Country Status (7)

Country Link
US (1) US3623709A (de)
BE (1) BE751103A (de)
DE (1) DE2029089B2 (de)
ES (1) ES380821A1 (de)
FR (1) FR2057488A5 (de)
LU (1) LU61550A1 (de)
NL (1) NL7011098A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046908A (en) * 1988-11-09 1991-09-10 Paul Wurth S.A. Installation for charging a shaft furnace

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU80646A1 (fr) * 1978-12-12 1979-04-13 Wurth Anciens Ets Paul Dispositif de chargement d'un four a cuve
DE10234520B4 (de) * 2002-07-30 2011-01-27 Paul Wurth S.A. Vorrichtung zur Bandbegichtung eines Hochofens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3554393A (en) * 1967-03-20 1971-01-12 Nationale De Rech Metallurg Ce Charging device for a furnace

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3554393A (en) * 1967-03-20 1971-01-12 Nationale De Rech Metallurg Ce Charging device for a furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046908A (en) * 1988-11-09 1991-09-10 Paul Wurth S.A. Installation for charging a shaft furnace

Also Published As

Publication number Publication date
FR2057488A5 (de) 1971-05-21
NL7011098A (de) 1971-02-24
ES380821A1 (es) 1972-09-16
DE2029089B2 (de) 1971-10-14
DE2029089A1 (de) 1971-10-14
LU61550A1 (de) 1970-10-22
BE751103A (fr) 1970-11-03

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