EP0116142B1 - Kühlvorrichtung für eine Schachtofenbeschickungsanlage - Google Patents

Kühlvorrichtung für eine Schachtofenbeschickungsanlage Download PDF

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Publication number
EP0116142B1
EP0116142B1 EP83112197A EP83112197A EP0116142B1 EP 0116142 B1 EP0116142 B1 EP 0116142B1 EP 83112197 A EP83112197 A EP 83112197A EP 83112197 A EP83112197 A EP 83112197A EP 0116142 B1 EP0116142 B1 EP 0116142B1
Authority
EP
European Patent Office
Prior art keywords
rotary
annular
cage
vat
accordance
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
EP83112197A
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English (en)
French (fr)
Other versions
EP0116142A1 (de
Inventor
Edouard Legille
Gilbert Bernard
Giovanni Cimenti
Guy Thillen
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Priority to AT83112197T priority Critical patent/ATE23195T1/de
Publication of EP0116142A1 publication Critical patent/EP0116142A1/de
Application granted granted Critical
Publication of EP0116142B1 publication Critical patent/EP0116142B1/de
Expired 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
    • C21B7/10—Cooling; Devices therefor
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden

Definitions

  • the present invention relates to a device for cooling a loading installation of a shaft furnace, comprising a fixed supply channel arranged vertically in the center of the furnace head, a rotary ferrule mounted coaxially around said supply channel , a fixed external carcass mounted coaxially outside said ferrule and laterally delimiting therewith a substantially annular chamber, this chamber being separated, but not isolated, from the interior of the furnace by means of a rotary cage integral with the rotary ferrule, a distribution chute, pivotally mounted in the rotary cage, a first drive means for rotating, as a unit, the ferrule, the cage and the chute around the vertical axis of the furnace and of the channel supply and a second drive means for pivoting the chute, independently of the movement resulting from the first drive means about its horizontal axis of suspension from the ferrule e.
  • This gas cooling has the advantage of not requiring any particular construction in the loading installation.
  • accessory installations for cleaning, cooling and compressing gases are extremely expensive, consume a lot of energy and require a lot of maintenance.
  • the object of the present invention is the contribution to the solution of these problems by a new water cooling device of the loading installation.
  • the invention provides a cooling device for a loading installation of a shaft furnace of the kind described in the preamble, which is essentially characterized by an annular feed tank fixed to the upper edge of the shell. rotary and whose two outer and inner concentric walls slide, by interposition of a seal, in an annular block fixed to the upper part of the carcass, below at least one cooling water intake pipe and provided at least one opening for the passage, by gravity, of the water in the tank, by several cooling coils arranged around the rotary cage and each connected by a pipe to said annular tank, by an annular collector fixed to the outer casing, by a rotary annular cover associated with said collector and fixed to the rotary cage and by pipes connecting each of the coils to said collector through the cover rotary, so that the water flows by gravity between the annular tank and the collector through said pipes and coils.
  • the passage openings in the annular block are preferably angularly offset relative to the intake pipes while the block has over the length of this offset a substantially horizontal groove for the flow of water for cooling.
  • the supply and discharge lines of the coils are preferably flexible to compensate for thermal and mechanical deformations.
  • an access opening is provided through the upper part of the carcass and the annular block.
  • the lower surface of the mobile cage is lined with insulating panels held by refractory steel sheets fixed to the cage by means of bolts with the interposition of insulating fibers eliminating thermal bridges.
  • An isolation labyrinth between the outer casing and the rotating cage prevents the rise of dust in the annular chamber.
  • An adaptation of the pressure inside the annular chamber to that prevailing in the furnace also contributes to preventing the rise of dust in this chamber.
  • FIG. 1 there is shown the upper part of a distribution chute 10 whose drive and suspension mechanism, generally represented by the reference 12 is of the type described in the aforementioned patent US-A-3,880,302 and does not will be described, therefore, that superficially, the reader will want to refer to the aforementioned patent for further details.
  • the drive mechanism essentially comprises two sets of gears 14 and 16 respectively serving for the rotation of a ferrule 18 around a central supply channel 20 for the rotation of the distribution chute 10 around the longitudinal axis of the furnace, respectively of the angular adjustment of the chute 10 with respect to this longitudinal axis.
  • the sets of gears 14 and 16 are driven respectively by a first and a second motor, not shown.
  • the transmission of movement between the gear 16 and the axes of suspension of the chute is effected by means of a ring gear 28 and two gear housings, not shown, but also described in detail in the aforementioned patent.
  • This annular chamber 26 is separated from the interior of the furnace by a cage 30 for hanging the chute, this cage 30 being integral with the rotary ferrule.
  • the parts directly exposed to the heat of the oven are the walls of the cage 30 and, to a lesser degree, the supply channel 20.
  • the invention provided for coating this cage with several cooling coils, three of which are shown in FIG. 1, namely the coils 32, 34 and 36 and in which water is circulated by gravity. Each of these coils is connected by means of a vertical pipe 38 running along the ferrule 18, to an annular supply tank 40 fixed on the upper edge of the rotary ferrule and shown in detail in FIG. 2.
  • This annular tank 40 which has a rectangular section is simply formed by the addition of an outer wall 42 to the shell 18 and defining with it the side edges of this tank 40. These side edges slide, during the rotation of the chute in an inner groove of an annular block 44 fixed on the upper part 50 of the outer carcass 24.
  • the block 44 has a passage opening 52 placing the tank 40 in communication with a pipe 54 for admitting cooling water.
  • the passage opening 52 is not located opposite the supply line 54, the communication being provided by a groove 56 which is substantially horizontal and which, when there is only an intake pipe 54 goes almost all around the annular block 44.
  • the purpose of the flow of cooling water in the groove 56 is to cool this block 44.
  • At least one access opening 58 passing through the upper part 50 of the carcass as well as the annular block 44.
  • each of the cooling circuits is connected through an evacuation pipe 64 fixed to the cover 62 by means of a connection block 66, to the manifold 60.
  • each of the pipes 38 and 64 preferably comprises a compensator with bellows 68.
  • the interior surfaces of the cage 30 are lined with insulating panels 70 held by sheets 72 of refractory steel, fixed to the walls of the cage by means of bolts 74 with the interposition of insulating fibers 76, the goal is to remove the thermal bridges between the chamber 26 and the interior of the oven.
  • the insulating panels 70 can have a thickness of approximately 75 mm.
  • the vertical walls of the cage 30 can also be lined with insulating panels 78 which can, however, be thinner, for example 25 mm, since the vertical surfaces are less exposed than the horizontal surfaces.
  • Another characteristic of the invention is a joint in the form of a labyrinth between the carcass and the rotary cage 30, the aim of which is to contribute to a better separation between the chamber 26 and the interior of the oven.
  • This labyrinth can be constituted by a circular groove 80 fixed on the carcass 24 and associated with a peripheral blade 82 of the cage 30, this lamp 82 constantly evolving in the groove 80.
  • the purpose of this labyrinth is to avoid that, as a result pressure variations at the top, there is a significant transition of dust being suspended in the gas in the direction of the chamber 26. In the absence of pressure variation, such a transition is prevented, advantageously by an adaptation of the pressure inside the chamber 26 to that prevailing inside the oven.
  • cooling circuits shown in FIG. 1 it is advantageous to provide two cooling circuits for the axes of suspension of the chute, these cooling circuits being able to be put in parallel with the circuits already described, that is to say be connected between the supply tank 40 and the collector 60 so that the water flows by simple gravity.
  • the reference 24 schematically designates the carcass in which the feed tank 40 and the collector 60 are located, between which the height A H is responsible for the flow of the cooling water by gravity. Between the tank 40 and the collector 60 are connected cooling circuits 86 and a cooling circuit 88 of the axis of the chute.
  • the circulation of the cooling water between the collector 60 and the tank 40 is ensured by a group of circulation pumps 90.
  • the circuit further comprises a heat exchanger 92, a flow meter 94 and a proportional automatic valve. 96.
  • An auxiliary circuit 98 with an automatic valve (100) makes it possible to introduce additional water into the circuit in order to compensate for the losses by evaporation.
  • the circuit is also provided with a drain pipe 102 associated with an automatic valve 104.
  • the circulation of water in the cooling circuit is automatically controlled under the control of four level measurements associated with the tank 40 and four associated level measurements in the collector 60.
  • the level in the collector 60 must be between the minimum and maximum levels i . If, for whatever reason, the level drops to a minimum, an alarm signal and automatic water replenishment are produced through the automatic valve 100. If, however, the level drops further, the pumps 90 are automatically stopped at min level 2 to prevent them from running empty. When the level rises as a result of the supply through line 98 the valve 100 is closed automatically as soon as the level reaches max i . If despite the closing of the valve 100 the level rises further, the valve 104 is opened automatically to allow the flow of water through the drain pipe 102 in order to prevent the water from overflowing and falling in the oven.
  • the level In the tank 40 the level must be, in normal operation between the minimum and maximum marks i . If the level drops to a minimum, the pumps 90 are controlled to run at full speed and the valve 96 is fully open. As soon as the rising level reaches the max mark, the proportional valve 96 progressively reduces the flow rate and commands a corresponding progressive reduction in the speed of the pumps 90. When the level reaches the threshold maX 2 the valve 96 is completely closed and the pumps 90 are stopped .
  • the level In normal operation, the level should not drop beyond the min 1 mark. If, despite this, the level falls below the mini mark, the automatic valve 100 is open to ensure replenishment through the manifold 60. Therefore the level should rise again in the tank 40 following the action of the pumps 90. If, despite the supply through line 98 and the action of the pumps, the level in tank 40 continues to fall, an alarm signal is triggered at the min 2 mark, which indicates that there probably has a leak at one of the consumers 86 or 88. In other words, in normal operation the min 2 levels should never be reached in the tank and in the collector 60 and, similarly, the maX 2 levels should never be overwhelmed. Exceeding these marks constitutes an automatic indication of a malfunction, for example a leak, either at the level of the tank or of the collector 60, or at the level of the consumers.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Blast Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Electric Stoves And Ranges (AREA)
  • Heat Treatment Of Articles (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Discharge Heating (AREA)
  • Details Of Measuring And Other Instruments (AREA)
  • Furnace Details (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (9)

1. Kühlvorrichtung für eine Schachtofenbeschickungsanlage, die einen feststehenden Zuführungskanal (20), der im Zentrum des Ofenkopfes vertikal angeordnet ist, einen rotierenden Ring (18), der koaxial um besagten Zuführungskanal (20) befestigt ist, ein feststehendes äusseres Rahmengestell (24), das koaxial ausserhalb besagten Ringes (18) angebracht ist und mit diesem eine annähernd ringförmige Kammer (26) seitlich begrenzt, wobei diese Kammer (26) vom Ofeninneren mittels eines rotierenden Gehäuses (30), das mit dem rotierenden Ring (18) verbunden ist, getrennt, aber nicht isoliert ist, eine Verteilerschurre (10), die schwenkbar im rotierenden Gehäuse (30) gelagert ist, ein erstes Antriebsmittel, um, en bloc, den Ring (18), das Gehäuse (30) und die Schurre (10) um die Vertikalachse des Ofens und des Zuführungskanals (20) drehen zu lassen, und ein zweites Antriebsmittel aufweist, um die Schurre, unabhängig von der vom ersten Antriebsmittel ausgehenden Bewegung, um ihre Horizontalachse der Aufhängung am Ring (18) schwenken zu lassen, gekennzeichnet durch eine ringförmige Zuführungsrinne (40), die am oberen Rand des rotierenden Ringes (18) befestigt ist und deren zwei konzentrische äussere und innere Wandungen, mittels Einlage einer Dichtung (46, 48), in einem ringförmigen Block (44) gleiten, der an der oberen Partie (50) des Rahmengestelles (24) unterhalb von mindestens einer Zuführungsleitung (54) für das Kühlwasser befestigt ist und der mit mindestens einer Öffnung (52) für den Durchgang, durch Schwerkraft, des Wassers in die Rinne (40) versehen ist, durch mehrere Kühlschlangen (30, 32, 34, 36), die um das rotierende Gehäuse (30) angeordnet sind und von denen jede über eine Leitung (38) mit besagter ringförmiger Rinne (40) verbunden ist, durch einen ringförmigen Kollektor (60), der am äusseren Rahmengestell (24) befestigt ist, durch eine rotierende ringförmige Abdeckung (62), die mit besagtem Kollektor (60) verbunden ist und am rotierenden Gehäuse (30) befestigt ist, und durch Leitungen (64), die jede der Schlangen (30, 32, 34, 36) mit besagtem Kollektor (60) durch die rotierende Abdeckung (62) hindurch verbinden, in der Art, dass das Wasser zwischen der ringförmigen Rinne (40) und dem Kollektor (60) durch besagte Leitungen und Schlangen hindurch durch Schwerkraft fliesst.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Durchgangsöffnungen (52) im ringförmigen Block (44) im Winkel in Bezug auf die Zuführungsleitungen (54) versetzt sind, wogegen der Block (44) über die Länge dieses Versatzes eine annähernd horizontale Rinne (56) für das Fliessen des Kühlwassers aufweist.
3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Leitungen für die Zuführung (38) und für die Entleerung (64) der Schlangen flexibel sind, um die thermischen und mechanischen Deformationen zu kompensieren.
4. Vorrichtung nach Anspruch 1, gekennzeichnet durch eine Zugangsöffnung (58) durch die obere Partie (50) des Rahmengestells und den ringförmigen Block (44) hindurch.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Innenfläche des rotierenden Gehäuses (30) mit isolierenden Tafeln (70) versehen ist, die durch Bleche (72) aus hitzebeständigem Stahl gehaltert sind, die am Gehäuse mittels Bolzen (74) mit Zwischenlage von isolierenden Fasern (76), die die thermischen Brücken unterdrücken, fixiert sind.
6. Vorrichtung nach Anspruch 1, gekennzeichnet durch eine Labyrinthisolierung (80, 82) zwischen dem Rahmengestell (24) und dem rotierenden Gehäuse (30).
7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Rinne (40) und der Kollektor (60) mit Niveaudetektoren verbunden sind, die eine automatische Funktion gewährleisten und eine Fehlerortung erlauben.
8. Vorrichtung nach einem der Ansprüche 1 bis 7, gekennzeichnet durch zwei Kühlkreise für die Wellen der Schurrenaufhängung, wobei diese Kreise ebenso zwischen der Rinne (40) und dem Kollektor (60) verzweigt sind.
9. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Dichtungen (46 und 48) Staubdichtungen sind.
EP83112197A 1982-12-10 1983-12-05 Kühlvorrichtung für eine Schachtofenbeschickungsanlage Expired EP0116142B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112197T ATE23195T1 (de) 1982-12-10 1983-12-05 Kuehlvorrichtung fuer eine schachtofenbeschickungsanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84521 1982-12-10
LU84521A LU84521A1 (fr) 1982-12-10 1982-12-10 Dispositif de refroidissement d'une installation de chargement d'un four a cuve

Publications (2)

Publication Number Publication Date
EP0116142A1 EP0116142A1 (de) 1984-08-22
EP0116142B1 true EP0116142B1 (de) 1986-10-29

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ID=19729994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112197A Expired EP0116142B1 (de) 1982-12-10 1983-12-05 Kühlvorrichtung für eine Schachtofenbeschickungsanlage

Country Status (17)

Country Link
US (1) US4526536A (de)
EP (1) EP0116142B1 (de)
JP (1) JPS59116306A (de)
KR (1) KR910000005B1 (de)
AT (1) ATE23195T1 (de)
AU (1) AU563622B2 (de)
BR (1) BR8306932A (de)
CA (1) CA1217050A (de)
CS (1) CS235994B2 (de)
DE (1) DE3367255D1 (de)
ES (1) ES8500430A1 (de)
IN (1) IN160180B (de)
LU (1) LU84521A1 (de)
MX (1) MX155924A (de)
SU (1) SU1192628A3 (de)
UA (1) UA7021A1 (de)
ZA (1) ZA838868B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3809533A1 (de) * 1987-03-24 1988-10-06 Wurth Paul Sa Verfahren und vorrichtung zum kuehlen einer beschickungsanlage eines schachtofens
DE4216166C2 (de) * 1991-06-12 2001-07-19 Wurth Paul Sa Vorrichtung zur Kühlung einer Verteilerschurre einer Schachtofen-Beschickungsanlage

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU84303A1 (fr) * 1982-07-28 1984-03-22 Wurth Paul Sa Procede et dispositif de commande du mouvement d'une goulotte oscillante et application a une installation de chargement d'un four a cuve
LU90179B1 (fr) 1997-11-26 1999-05-27 Wurth Paul Sa Procede pour refroidir un dispositif de chargement d'un four a cuve
LU90294B1 (fr) * 1998-10-06 2000-04-07 Wurth Paul Sa Dispositif de répartition de matières en vrac
LU90794B1 (fr) * 2001-06-26 2002-12-27 Wurth Paul Sa Dispositif de chargement d'un four à cuve
EP1801241A1 (de) * 2005-12-23 2007-06-27 Paul Wurth S.A. Kühlvorrichtung einer Schachtofen-Beschickungsanlage mit rotierbarer Verteilerschurre
LU91412B1 (en) * 2008-01-30 2009-07-31 Wurth Paul Sa Charging device for distributing bulk material
LU91601B1 (en) * 2009-08-26 2012-09-13 Wurth Paul Sa Shaft furnace charging device equipped with a cooling system and annular swivel joint therefore
LU91645B1 (en) 2010-01-27 2011-07-28 Wurth Paul Sa A charging device for a metallurgical reactor
LU91717B1 (en) 2010-08-06 2012-02-07 Wurth Paul Sa Distribution device for use in a charging installation of a metallurgical reactor
LU91772B1 (en) * 2011-01-06 2012-07-09 Wurth Paul Metal Tech Beijing A cooling system of a rotary charging device for a shaft furnace
EP2836446B1 (de) 2012-04-09 2023-02-22 Opex Corporation Verfahren und vorrichtung zum sortieren oder abrufen von artikeln
CN106395434B (zh) * 2016-11-01 2018-12-11 中冶焦耐(大连)工程技术有限公司 一种旋转布料器的旋转液封盖

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU65312A1 (de) * 1972-05-08 1972-08-23
LU65537A1 (de) * 1972-06-16 1972-10-25
JPS5111014B2 (de) * 1973-01-31 1976-04-08
JPS5113722B2 (de) * 1973-02-02 1976-05-01
LU80112A1 (de) * 1978-08-16 1979-01-19
DE2942121A1 (de) * 1979-10-18 1981-04-30 Klöckner-Humboldt-Deutz AG, 5000 Köln Ofenanlage, insbesondere zum schmelzen von erzkonzentrat
LU82173A1 (fr) * 1980-02-15 1980-05-07 Wurth Sa O Dispositif de chargement pour fours a cuve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3809533A1 (de) * 1987-03-24 1988-10-06 Wurth Paul Sa Verfahren und vorrichtung zum kuehlen einer beschickungsanlage eines schachtofens
DE4216166C2 (de) * 1991-06-12 2001-07-19 Wurth Paul Sa Vorrichtung zur Kühlung einer Verteilerschurre einer Schachtofen-Beschickungsanlage

Also Published As

Publication number Publication date
CA1217050A (en) 1987-01-27
UA7021A1 (uk) 1995-03-31
MX155924A (es) 1988-05-23
ES527860A0 (es) 1984-11-01
LU84521A1 (fr) 1984-10-22
BR8306932A (pt) 1984-07-24
SU1192628A3 (ru) 1985-11-15
ATE23195T1 (de) 1986-11-15
KR910000005B1 (ko) 1991-01-19
JPH0354163B2 (de) 1991-08-19
JPS59116306A (ja) 1984-07-05
AU563622B2 (en) 1987-07-16
KR840007027A (ko) 1984-12-04
CS235994B2 (en) 1985-05-15
ES8500430A1 (es) 1984-11-01
ZA838868B (en) 1984-09-26
IN160180B (de) 1987-06-27
AU2197483A (en) 1984-06-14
EP0116142A1 (de) 1984-08-22
DE3367255D1 (en) 1986-12-04
US4526536A (en) 1985-07-02

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