EP0081475B1 - Dispositif de déchargement d'un matériau chaud d'un récipient, en particulier d'éponge de fer d'un four à cuve - Google Patents

Dispositif de déchargement d'un matériau chaud d'un récipient, en particulier d'éponge de fer d'un four à cuve Download PDF

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Publication number
EP0081475B1
EP0081475B1 EP82890173A EP82890173A EP0081475B1 EP 0081475 B1 EP0081475 B1 EP 0081475B1 EP 82890173 A EP82890173 A EP 82890173A EP 82890173 A EP82890173 A EP 82890173A EP 0081475 B1 EP0081475 B1 EP 0081475B1
Authority
EP
European Patent Office
Prior art keywords
grate bars
inner tube
grate
discharge
line
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
Application number
EP82890173A
Other languages
German (de)
English (en)
Other versions
EP0081475A3 (en
EP0081475A2 (fr
Inventor
Ernst Oberndorfer
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.)
Voestalpine AG
Original Assignee
Voestalpine AG
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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0081475A2 publication Critical patent/EP0081475A2/fr
Publication of EP0081475A3 publication Critical patent/EP0081475A3/de
Application granted granted Critical
Publication of EP0081475B1 publication Critical patent/EP0081475B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • 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
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/21—Arrangements of devices for discharging

Definitions

  • the invention relates to a device for discharging free-flowing material from a standing container with a discharge tool forming the container bottom, which consists of a grate of parallel, cross-sectionally non-circular grate bars which can be driven to swing about their longitudinal axis.
  • Devices of this type are known from DE-C-829 423 and allow a uniform discharge over the cross-section of the container of the free-flowing material, because due to the non-circular cross-section of the grate bars during the pivoting movement there are opening and closing discharge gaps through which the free-flowing material can flow out.
  • the gaps resulting from the torsional vibrations between the grate bars are at least closed to such an extent that no good particles can pass between the grate bars.
  • the invention has for its object to improve a device of the type described in such a way that its advantages can also be exploited when discharging hot material, in particular sponge iron, from a shaft furnace without the risk of the grate bars being overheated.
  • the grate bars for cooling liquid guidance are hollow and enclose an inner tube, that an annular space is formed between the grate bar jacket and the outside of the inner tube, which is connected to the interior of the inner tube by at least one passage opening, and that the cross section of the annular space is smaller than the free cross section of the inner tube.
  • the inner tube enclosed by the grate bar jacket is in fact filled with coolant, which must additionally evaporate when the coolant supply is interrupted before the grate bars can overheat.
  • the inner tube acts not only in this regard as a coolant reservoir with the advantage of an increased homogenization of the coolant temperature, but can can also be used for supporting functions if the grate bar jacket is connected to the inner tube accordingly.
  • the coolant supplied through the inner tube and returned in countercurrent through the annular space between the inner tube and the rod jacket for discharge results in a particularly high uniformity with regard to the grate rod temperature, because an additional temperature exchange between the supplied and the removed coolant takes place via the inner tube. This practically avoids different thermal expansions over the length of the grate bars.
  • the connection of the discharge line for the cooling liquid can advantageously be provided in the upper apex region of the grate bars. Particularly favorable conditions result if the connection for the discharge of the cooling liquid forms a collecting space tapering upwards for the discharge, via which steam inevitably flows into the discharge line.
  • One of these stub axles 6 has a central connection bore 7 for a feed line 8 for a cooling liquid, usually water, which passes through the connection bore 7 into an inner tube 9 which, according to FIG. 2, is connected tightly to the axle stub 6 having the connection bore 7 and is enclosed at a radial distance from the grate bar jacket 5.
  • the inner tube 9 is connected via spacers 10 to the jacket of the grate bars 2, so that a composite body composed of the grate bar jacket 5 and the inner tube 9 results with a comparatively high bending strength.
  • the grate bars 2 have a non-circular cross-section which is determined by a half circular cylindrical shell with two adjoining wall parts of the grate bar jacket 5, which enclose an obtuse angle. Due to this non-circular cross-section, in the drawn basic position of the grate bars, there is an essentially closed floor surface on which the material stock rests. If the grate bars are driven in a rotating manner, outlet gaps are formed between them through which sponge iron can escape.
  • the grate bars 2 are driven in a simple manner via crank arms 15 which are clamped to the stub axles 6 and which are articulated on push rods 16. About the The discharge quantity can be metered in the oscillation range.
  • connection 13 provided in the upper apex area of the grate bars 2 for the discharge 14 of the cooling liquid forms a collecting space 17 which tapers upward towards the discharge, as is indicated in FIG. 4. In this way the evacuation of vapor bubbles can be ensured without fear of accumulation of vapor bubbles in dead spaces.
  • the device shown for discharging hot sponge iron from a shaft furnace can, of course, also be used for discharging other hot material from a container if passage of this material is ensured by the discharge gaps between them when the grate bars are driven.
  • the thermal load caused by the hot material is kept within acceptable limits by the cooling which can be achieved and is uniform over the grate bar length.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Manufacture Of Iron (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Charging Or Discharging (AREA)

Claims (4)

1. Dispositif pour extraire un produit ruisselant bien d'un récipient dressé avec un outil extracteur formant le fond du récipient et composé d'une grille (1) formée de barreaux (2) parallèles d'une section transversale non-ronde qui peuvent être entraînés en un mouvement de rotation oscillante autour de leur axe longitudinal, caractérisé par le fait que pour pouvoir assurer une circulation d'un fluide de refroidissement, les barreaux (2) sont réalisés creux et entourent un tube interne (9), qu'entre l'enveloppe (5) formant le barreau de grille et le côté extérieur du tube interne (9) est formé un espace annulaire (12) qui communique avec la cavité intérieure du tube interne (9) par au moins un orifice (11) de passage, et que la section transversale de l'espace annulaire (12) est plus petite que la section transversale libre du tube interne (9).
2. Dispositif selon la revendication 1, caractérisé par le fait qu'un tube interne (9) présentant une enveloppe fermée est relié à une extrémité à une conduite d'arrivée (8) du fluide de refroidissement et, à son extrémité opposée, réalisé ouvert, et que le branchement (13) de la conduite d'évacuation (14) du fluide de refroidissement se situe dans la zone de l'extrémité des barreaux (2) de grille qui correspond à la conduite d'arrivée (8).
3. Dispositif selon la revendication 1 ou 2, caractérisé par le fait que le branchement (13) de la conduite d'évacuation (14) du fluide de refroidissement est prévu dans la zone du sommet en hauteur des barreaux (2) de grille.
4. Dispositif selon la revendication 3, caractérisé par le fait que le branchement (13) de la conduite d'évacuation (14) du fluide de refroidissement forme une cavité collectrice (17) qui va en se rétrécissant vers le haut en direction de la conduite d'évacuation (14).
EP82890173A 1981-12-07 1982-11-23 Dispositif de déchargement d'un matériau chaud d'un récipient, en particulier d'éponge de fer d'un four à cuve Expired EP0081475B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT5230/81 1981-12-07
AT0523081A AT373624B (de) 1981-12-07 1981-12-07 Vorrichtung zum austragen eines heissen gutes aus einem stehenden behaelter, insbesondere von eisen- schwamm aus einem schachtofen

Publications (3)

Publication Number Publication Date
EP0081475A2 EP0081475A2 (fr) 1983-06-15
EP0081475A3 EP0081475A3 (en) 1983-08-17
EP0081475B1 true EP0081475B1 (fr) 1986-07-02

Family

ID=3573439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82890173A Expired EP0081475B1 (fr) 1981-12-07 1982-11-23 Dispositif de déchargement d'un matériau chaud d'un récipient, en particulier d'éponge de fer d'un four à cuve

Country Status (5)

Country Link
US (1) US4407489A (fr)
EP (1) EP0081475B1 (fr)
JP (1) JPS6046353B2 (fr)
AT (1) AT373624B (fr)
DE (1) DE3271900D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725309A (en) * 1986-03-17 1988-02-16 Hylsa, S.A. Method and apparatus for producing hot direct reduced iron
US5409197A (en) * 1993-02-08 1995-04-25 Davis; Michael Cooling member for blast furnace tap opening
IT1310772B1 (it) * 1999-09-06 2002-02-22 Danieli Off Mecc Forno per la riduzione diretta di ossidi di ferro
DE102009021921B3 (de) * 2009-05-19 2010-06-17 Beteiligungen Sorg Gmbh & Co. Kg Vorrichtung und Verfahren zum Erzeugen von Glasschmelzen mit einem Schmelzschacht
JP2014062301A (ja) * 2012-09-21 2014-04-10 Kobe Steel Ltd 還元鉄冷却装置及び還元鉄冷却方法
DE102016112969A1 (de) 2016-07-14 2018-01-18 Thyssenkrupp Ag Austragsvorrichtung für einen Schachtofen und Verfahren zum Austragen von Brenngut aus einem Schachtofen
CN110392486A (zh) * 2019-07-24 2019-10-29 苏州创峰光电科技有限公司 输送轴套及电路板湿制程设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2301791A (en) * 1940-05-25 1942-11-10 Laurence P Pitre Calcining apparatus
DE829423C (de) * 1949-04-25 1952-01-24 Humphreys & Glasgow Ltd Anordnung zum Abfuehren von Schuettgut aus einem Behaelter
DE1531015A1 (de) * 1967-06-30 1969-07-31 Rheinstahl Wanheim Gmbh Behaelter zum Trocknen,Konservieren und Lagern von Getreide u.dgl.
US3704011A (en) * 1971-08-12 1972-11-28 Mintech Corp Discharge mechanism for shaft kiln
IT1029175B (it) * 1975-04-28 1979-03-10 Kinglor Metor Spa Estrattore di spugna di ferro da storte

Also Published As

Publication number Publication date
EP0081475A3 (en) 1983-08-17
EP0081475A2 (fr) 1983-06-15
ATA523081A (de) 1983-06-15
AT373624B (de) 1984-02-10
JPS58104107A (ja) 1983-06-21
DE3271900D1 (en) 1986-08-07
US4407489A (en) 1983-10-04
JPS6046353B2 (ja) 1985-10-15

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