EP0143971A1 - Rigole de coulée pour un four à cuve - Google Patents

Rigole de coulée pour un four à cuve Download PDF

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Publication number
EP0143971A1
EP0143971A1 EP84112751A EP84112751A EP0143971A1 EP 0143971 A1 EP0143971 A1 EP 0143971A1 EP 84112751 A EP84112751 A EP 84112751A EP 84112751 A EP84112751 A EP 84112751A EP 0143971 A1 EP0143971 A1 EP 0143971A1
Authority
EP
European Patent Office
Prior art keywords
lining
cooling elements
cooling
main
tapping
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.)
Granted
Application number
EP84112751A
Other languages
German (de)
English (en)
Other versions
EP0143971B1 (fr
Inventor
Gerd Dipl.-Ing. Pfrötschner
Friedrich Dipl.-Ing. Träger
Horst-Peter Dipl.-Ing. Rüther
Wilfried Brieler
Jochem Stasius
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.)
BETR FORSCH INST ANGEW FORSCH
Vodafone GmbH
BFI VDEH Institut fuer Angewandte Forschung GmbH
Original Assignee
BETR FORSCH INST ANGEW FORSCH
Mannesmann AG
BFI VDEH Institut fuer Angewandte Forschung GmbH
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 BETR FORSCH INST ANGEW FORSCH, Mannesmann AG, BFI VDEH Institut fuer Angewandte Forschung GmbH filed Critical BETR FORSCH INST ANGEW FORSCH
Publication of EP0143971A1 publication Critical patent/EP0143971A1/fr
Application granted granted Critical
Publication of EP0143971B1 publication Critical patent/EP0143971B1/fr
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
    • C21B7/14—Discharging devices, e.g. for slag

Definitions

  • the invention relates to a shaft furnace, in particular a blast furnace, for the production of pig iron, consisting of a trough with a refractory lining that carries the liquid metal.
  • tapping channels are known in principle, for example from DE-PS 28 36 123. They consist essentially of a metallic trough with a refractory lining arranged therein that guides the melt.
  • channel linings have prevailed, which initially have a permanent lining made of refractory stones associated with the metallic trough and a wear lining consisting of a refractory mass for guiding the liquid metal.
  • the trough is exposed to strong thermal loads.
  • the wear on refractory material is correspondingly high. If one looks at the ratio of tapping time (i.e. the usage time of the channel in which pig iron flows through the channel) in relation to the rest time (i.e.
  • the usage time of the channel is longer than the resting time today.
  • the time remaining for repair work on the refractory material of a tapping channel is correspondingly short.
  • larger areas of the channel are operated with liquid sump, i.e. That is, in this area, the channel is constantly filled with pig iron, including in the breaks between tapping.
  • the invention is therefore based on the object of providing a device which is both capable of increasing the service life of the refractory material and which at the same time permits control of the wear of the channel lining. In particular, operational security should be guaranteed.
  • cooling elements are arranged parallel to the planes of the side walls of the trough; the cooling elements, which are advantageously delimited by plates, are then approximately perpendicular to the heat flow direction with the latter.
  • the cooling elements can, however, also consist of coils, which, in an appropriate bundle arrangement, enable large-area heat absorption.
  • the arrangement of the cooling elements according to the invention is such that they lie within the wear lining in the vicinity of the permanent lining. In this way, the permanent feed can be obtained and the wear lining can be renewed in good time.
  • a layer of refractory material between the cooling elements and the wear lining with a high thermal conductivity that is greater than that of the permanent lining and the wear lining.
  • a layer is expediently made of graphite stones.
  • the action of the cooling elements on the wear lining is particularly favorable in this case because the layer mentioned enables a high level of heat removal and because they are also protected by the layer.
  • thermocouples can advantageously be attached to a copper plate, which in some cases covers a cooling element and is located in the wear lining in the vicinity of the cooling elements in parallel with the latter.
  • the area relevant for heat reception can thus be increased many times over the arrangement of individual thermocouples. This also reliably detects localized temperature increases, such as are possible, for example, when liquid pig iron penetrates into gaps.
  • Additional valves are advantageously used to connect the cooling elements to branch lines for the main lines of the water inlet and the water return.
  • branched valves are provided for the connection of the cooling elements to branch lines of the main lines for the compressed air and for the exhaust air.
  • a further thermal monitoring can be carried out on the inlet-side pipe connections by resistance thermometers. This monitoring is supplemented by flow monitors. Both the thermal monitoring and the flow monitoring are then additionally connected to the control circuit, so that a corresponding switchover also takes place if there are faults in the cooling water supply.
  • thermocouples of the copper plate in the refractory lining are switched to the control circuit for controlling the solenoid valves via limit switches, which on the one hand can be set to maximum temperature differences and also to maximum temperature change rates. In this case, a direct connection to a relay of the control circuit mentioned is possible.
  • a further improvement of the monitoring results from the fact that additional flow meters are arranged in the main water pipes.
  • FIG. 1 shows the cross section of the trough-shaped channel 1 formed by the iron base plates 2 and side walls 3.
  • the channel is lined with the permanent lining 6 made of refractory bricks, which is followed by the wear lining 5 made of refractory ramming compound.
  • the liquid pig iron 30 largely fills the average cross section and acts on the refractory material in almost the entire interior.
  • cooling elements 4 are provided, which can be acted upon by connecting pipes 34 with a coolant, that is normally with cooling water.
  • the coolant is discharged via further connecting lines 34.
  • the cooling elements 4 rest on at least part of their surface on one side against the permanent lining 6, while their other side faces the wear lining 5. Between the latter and the cooling elements, the layer 7 made of graphite stones can be seen. Arranged below the cooling elements are still gutters 8, which are provided with a pipe section 9, which penetrates the permanent lining 6 and the side wall and allows leakage of escaping leakage in an emergency. In normal operation, however, water leakage is also ruled out if the above-mentioned switchovers become necessary as a result of severe damage to the wear lining.
  • a copper plate 11 can also be seen, which covers the cooling element 4 above and below.
  • the copper plate 11 carries thermocouples, of which the upper one is provided with the reference number 10. Otherwise, the copper plate 11 runs parallel to the surface area of the cooling element 4, which is in turn delimited by plates, such that both the copper plate 11 and the cooling element 4 run parallel to the side wall 3 of the tapping channel and thus approximately perpendicular to the direction of heat flow.
  • the line diagram according to FIG. 2 shows three cooling elements 4 located next to one another, as they are operationally arranged in a vertical position inside the channel, so that the respective stub lines can be connected from above.
  • the stubs 14 are connected to the main water supply line 12 and the stubs 15 to the main water outlet line 13. For reasons of clarity, the further reference numerals of the parts belonging to each of the cooling boxes 4 are only shown for the left cooling box.
  • Each of the branch lines 14, 15 leads to a connecting pipeline 34 via a valve 16.
  • the stub lines 14 for the water inflow correspond to stub lines which can be connected to the compressed air main line 19 via a valve 17 each and which likewise lead to connecting pipelines 34.
  • the stub lines 15 correspond to the stub lines for water drainage, which can be connected to the main exhaust air line 20 via a valve 18.
  • Each of the main lines for compressed air 19, exhaust air 20, water inlet 12 and water outlet 13 also has a solenoid valve 23, 24, 25, 26 which can be controlled in a manner to be described.
  • the flow meter 31 and manometer indicate the water flow.
  • the cooling elements 4 are shown without their connections to the stub lines for the sake of simplicity.
  • the limit switch 28 is in turn connected to a relay 22.
  • the temperature of the copper plate 11 upstream of the cooling elements 4 in the direction of the liquid pig iron is detected by the thermocouples 10, which are connected to a limit switch 21 to which the relay 22 is connected.
  • the outputs of the relay 22 are switched to the solenoid valves 23, 24, 25 and 26 to control the latter.
  • the acoustic signal generator 4D is also activated.
  • the recording recorders 38 and 39 are used for the continuous monitoring of both the temperatures detected by the thermocouples 10 and the temperatures by the resistance thermometers 29.
  • a pipe coil 32 in the wear lining 5 as the cooling element 4 which is made of heat-resistant steel and is fixed in a manner known per se with anchors 33, so that expansion of the overall system when heated can be compensated for .
  • the pipe coil 32 is followed by connecting lines 34 which are guided through the permanent lining 6, the side wall 3 and the supporting structure 35.
  • the connecting pipes 34 are flexibly connected to the further lines in a manner known per se via compensators 36.
  • shut-off valves 16, 17 and 18 can be used to carry out individual switching operations. This is done in such a way that the two valves 16 of the cooling element 4 in question are closed and the valves 17 and 18 are opened. The operation of the remaining cooling elements is then not affected. The valves 24 and 25 remain open in this case.
  • Both the flow monitors 29 and the resistance thermometers 27 indicate the lack of water in the cooling circuit. If a minimum water quantity that can be set on the flow monitor 29 is undershot or if the corresponding temperature is exceeded, those processes are triggered for safety reasons as described under a).
  • FIG. 2 shows the safety valve 37, which is set, for example, to a pressure of 6 bar, so that the steam can escape when this pressure is exceeded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Blast Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP84112751A 1983-10-28 1984-10-23 Rigole de coulée pour un four à cuve Expired EP0143971B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3339135 1983-10-28
DE19833339135 DE3339135A1 (de) 1983-10-28 1983-10-28 Abstichrinne fuer einen schachtofen

Publications (2)

Publication Number Publication Date
EP0143971A1 true EP0143971A1 (fr) 1985-06-12
EP0143971B1 EP0143971B1 (fr) 1987-06-10

Family

ID=6212956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112751A Expired EP0143971B1 (fr) 1983-10-28 1984-10-23 Rigole de coulée pour un four à cuve

Country Status (3)

Country Link
EP (1) EP0143971B1 (fr)
JP (1) JPS60110805A (fr)
DE (2) DE3339135A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404212A1 (fr) * 1989-06-21 1990-12-27 Hoogovens Groep B.V. Rigole de coulée pour fonte liquide
EP0501045A1 (fr) * 1991-02-27 1992-09-02 Hoogovens Groep B.V. Chenal de coulée de la fonte
EP1036848A1 (fr) * 1999-03-16 2000-09-20 SMS Demag AG Rigole de coulée pour un four à cuve
EP2861340A4 (fr) * 2012-06-14 2015-11-04 Prod Ind De Haute Temperature Pyrotek Inc Réceptacle pour manipuler du métal fondu, ensemble de moulage et procédé de fabrication

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR932508A (fr) * 1946-08-21 1948-03-24 Procédé et dispositif pour le contrôle des circuits de refroidissement par circulation d'eau, en particulier pour tuyères de vent chaud
DE1060559B (de) * 1956-10-30 1959-07-02 Asea Ab Betrieb einer Sicherheitsvorrichtung fuer wassergekuehlte, elektrische Ruehrwicklungen
US3499638A (en) * 1967-11-13 1970-03-10 John E Allen Method of cooling damaged blast furnace cooling elements
DE2428590A1 (de) * 1974-06-10 1975-12-18 Hassanzadeh M Reza Dipl Ing Neuartige hochofenschlackenrinne, die aus metall besteht
FR2400558A1 (fr) * 1977-08-17 1979-03-16 Nippon Kokan Kk Chenal de coulee pour laitier de haut fourneau
EP0004614A1 (fr) * 1978-04-04 1979-10-17 VOEST-ALPINE Aktiengesellschaft Système de refroidissement pour un convertisseur d'acierie
DE3101788A1 (de) * 1980-02-19 1982-01-07 VEB Bandstahlkombinat Hermann Matern, DDR 1220 Eisenhüttenstadt Rinne, vorzugsweise schlackenrinne fuer hochoefen
EP0060239A1 (fr) * 1981-03-04 1982-09-15 VOEST-ALPINE Aktiengesellschaft Cheval de coulée pour métal en fusion
EP0090761A1 (fr) * 1982-03-26 1983-10-05 Arbed S.A. Rigole de coulée pour métaux liquides

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR932508A (fr) * 1946-08-21 1948-03-24 Procédé et dispositif pour le contrôle des circuits de refroidissement par circulation d'eau, en particulier pour tuyères de vent chaud
DE1060559B (de) * 1956-10-30 1959-07-02 Asea Ab Betrieb einer Sicherheitsvorrichtung fuer wassergekuehlte, elektrische Ruehrwicklungen
US3499638A (en) * 1967-11-13 1970-03-10 John E Allen Method of cooling damaged blast furnace cooling elements
DE2428590A1 (de) * 1974-06-10 1975-12-18 Hassanzadeh M Reza Dipl Ing Neuartige hochofenschlackenrinne, die aus metall besteht
FR2400558A1 (fr) * 1977-08-17 1979-03-16 Nippon Kokan Kk Chenal de coulee pour laitier de haut fourneau
EP0004614A1 (fr) * 1978-04-04 1979-10-17 VOEST-ALPINE Aktiengesellschaft Système de refroidissement pour un convertisseur d'acierie
DE3101788A1 (de) * 1980-02-19 1982-01-07 VEB Bandstahlkombinat Hermann Matern, DDR 1220 Eisenhüttenstadt Rinne, vorzugsweise schlackenrinne fuer hochoefen
EP0060239A1 (fr) * 1981-03-04 1982-09-15 VOEST-ALPINE Aktiengesellschaft Cheval de coulée pour métal en fusion
EP0090761A1 (fr) * 1982-03-26 1983-10-05 Arbed S.A. Rigole de coulée pour métaux liquides

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404212A1 (fr) * 1989-06-21 1990-12-27 Hoogovens Groep B.V. Rigole de coulée pour fonte liquide
US5031882A (en) * 1989-06-21 1991-07-16 Hoogovens Groep B.V. Channel structure for flow of molten pig iron
EP0501045A1 (fr) * 1991-02-27 1992-09-02 Hoogovens Groep B.V. Chenal de coulée de la fonte
EP1036848A1 (fr) * 1999-03-16 2000-09-20 SMS Demag AG Rigole de coulée pour un four à cuve
EP2861340A4 (fr) * 2012-06-14 2015-11-04 Prod Ind De Haute Temperature Pyrotek Inc Réceptacle pour manipuler du métal fondu, ensemble de moulage et procédé de fabrication

Also Published As

Publication number Publication date
EP0143971B1 (fr) 1987-06-10
DE3339135A1 (de) 1985-05-09
JPS60110805A (ja) 1985-06-17
DE3464143D1 (en) 1987-07-16

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