EP0044792B1 - Kühlvorrichtung für Hochofen und Kühlplatte dafür - Google Patents

Kühlvorrichtung für Hochofen und Kühlplatte dafür Download PDF

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Publication number
EP0044792B1
EP0044792B1 EP81401167A EP81401167A EP0044792B1 EP 0044792 B1 EP0044792 B1 EP 0044792B1 EP 81401167 A EP81401167 A EP 81401167A EP 81401167 A EP81401167 A EP 81401167A EP 0044792 B1 EP0044792 B1 EP 0044792B1
Authority
EP
European Patent Office
Prior art keywords
cooling
circular
plates
tubes
conduit
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
EP81401167A
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English (en)
French (fr)
Other versions
EP0044792A2 (de
EP0044792A3 (en
Inventor
Jean Cordier
Pierre Rollot
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.)
USINOR SA
Original Assignee
Union Siderurgique du Nord et de lEst de France SA USINOR
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 Union Siderurgique du Nord et de lEst de France SA USINOR filed Critical Union Siderurgique du Nord et de lEst de France SA USINOR
Priority to AT81401167T priority Critical patent/ATE16201T1/de
Publication of EP0044792A2 publication Critical patent/EP0044792A2/de
Publication of EP0044792A3 publication Critical patent/EP0044792A3/fr
Application granted granted Critical
Publication of EP0044792B1 publication Critical patent/EP0044792B1/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

Definitions

  • the present invention relates to an installation for cooling metallurgical units, the walls of which are subjected to high heat fluxes and more particularly to the cooling of blast furnaces using cooling plates.
  • the heat flux emitted in the different zones of the blast furnace must be captured by a heterogeneous system formed of the refractory lining, the cooling element, i.e. the cooling plate, the shielding, such as the element cooler fulfills a double function of energetic cooling of the refractory and of screen as the flow passes to the shielding.
  • the cooling element i.e. the cooling plate
  • the shielding such as the element cooler fulfills a double function of energetic cooling of the refractory and of screen as the flow passes to the shielding.
  • These plates consist of cast iron elements traversed in their mass by a network of tubes in which circulates a cooling fluid which, in the techniques known until now, consists of water subjected to vaporization in contact with the flow of heat that the cooling plate is intended to absorb.
  • Application DE-A-2 017 569 describes a cooling installation essentially aimed at cooling the blast furnace nozzles, comprising an external circuit for circulation of the cooling fluid which, according to one of the embodiments, allows the liquid phase to be maintained in the coolant.
  • Patent FR-A-2 054 737 describes an installation for cooling the shielding of a blast furnace using a technique using cooling plates, but according to the principle of spray cooling.
  • the present invention aims to remedy these drawbacks by proposing to provide a cooling installation having greater reliability, lower cost and an operation making it possible to know and control the operation of the blast furnace by detecting thermal fluxes. emitted by the different zones of the latter.
  • the present invention thus relates to a cooling installation of a blast furnace using cooling plates in which a cooling fluid circulates, these plates being arranged in successive rings superimposed along the internal wall of the shielding of the blast furnace and being traversed by internal tubes for circulation of the coolant, the internal tubes of two adjacent plates in a vertical plane being interconnected so as to define a network of vertical fluid circulation lines, said network being connected at each of its ends to an external circuit for circulation and cooling of the fluid defining a closed, forced and pressurized circuit comprising a supply circular, a return circular, a battery of heat exchangers connected to the return circular by a return line and to the supply circular by a supply line, a battery of rec pumps including the coolant disposed on the supply line, and at least one expansion tank placed on the return line at the selected pressurization level, characterized in that the external circuit comprises at least one supply circular, said (said) supply circular (s) being connected to the various inlets of the circulation lines situated at different levels of rings of cooling plates corresponding to the various inlets,
  • the cooling fluid is in particular water which is normally maintained in the liquid state throughout the entire circuit.
  • a special oil resistant to 300 ° C can also be used as the cooling fluid.
  • This characteristic allows a global control of the water flow and therefore a leakage detection by differential measurement.
  • lower water pressures and temperatures can be maintained, which makes it possible to use an apparatus whose technical characteristics are lower and therefore the cost of the installation is lower.
  • Knowledge of the exact flow rates of liquids as well as the measurement of temperatures at different points also makes it possible to know the quantities of heat evacuated in determined zones of the blast furnace, consequently the measurement of the flows emitted in these different zones. Since the water is kept in the liquid state, the formation of local gas pockets preventing the correct evacuation of calories is completely avoided and the risks of deterioration by overheating are limited.
  • the installation shown in FIG. 1 comprises a blast furnace 1 against the inner wall of which are placed cooling plates of which only the internal pipes have been shown connected to each other by the general reference 2.
  • the cooling plates in fact comprise internal tubes which open out to the upper and lower parts of the latter and are connected to the adjacent upper plate and to the immediately lower adjacent plate in a vertical plane, to define a circulation line consisting of all the internal tubes connected to each other defined by the general reference 2.
  • a circular supply pipe 3 surrounding the blast furnace at its lower part comprises a set of individual supply pipes 4 which are respectively connected to the inputs 5 of the circulation lines 2.
  • a circular return pipe 6 surrounding the blast furnace at a higher level also comprises a set of individual return lines 7 connected to the outputs 8 of the circulation lines.
  • This set of vertical circulation lines constitutes a network placed along the shield of the blast furnace which is respectively connected at its bottom part to the feed circular 3 and at the top part to the return circular 6.
  • This network of circulation lines is connected at each of its ends by means of the feed circulars 3 and return 6 to an external circuit on which it is closed.
  • This circuit comprises at least one heat exchanger 9 which is connected to the return circular 6 by a return pipe 10.
  • a battery of recycling pumps 12a, 12b, and 12c returns the coolant from the exchanger 9 to the supply circular 3 by a supply line 13.
  • This battery of pumps comprises two electric pumps 12a and 12b and a 12c diesel backup pump.
  • a line 14 makes it possible to bypass the exchanger 9.
  • a line 15 for supplying additional coolant fluid opens into the supply line 13 at a point located between the battery of the recycling pumps 12a, 12b and 12c and the feed circular 3.
  • the expansion tank has a level regulator 32 which controls a valve 33 for the intake of the auxiliary coolant, placed at the inlet of the pipe 15.
  • the tank 11 also includes a degassing cyclone 34 (deaeration) eventual.
  • a counter 35 is placed on the pipe 15 downstream of the valve 33 to detect a possible leak on the circuit and functions as a primary alert.
  • the cooling fluid is kept in the liquid state, although provision is made, thanks to the flask 11, for the possibility of accidental boiling.
  • the flow rates in the various circulation lines 2 are regulated by means of valves not shown, positioned to obtain identical flow rates in each of the lines. Sufficient flow is provided by the battery of recycling pumps.
  • a line 36 allows the battery of recycling pumps 12a, 12b and 12c to be bypassed and therefore authorizes autosiphon operation as a backup.
  • Line 36 also includes a valve 37.
  • the heat exchanger can be an air cooler as shown or a liquid / liquid heat exchanger and several branches can be arranged in parallel to form a battery.
  • the cooling fluid which, in the following description will be considered without limitation as being water, is introduced at different levels in the same vertical plane along different rows of the cooling plates which are schematically illustrated by rectangles numbered from 0 to 11.
  • the installation in a practical way in fact comprises two circular feeders 3a and 3b from which are fed different inputs 5a, 5b, 5c, 5d ... of the internal tubes of the plates cooling defining separate parallel circulation lines.
  • the installation likewise comprises two return circulars 6a and 6b which take the cooling fluid from different levels of cooling plates.
  • supply circulars 3a, 3b and return 6a, 6b are connected to the external cooling circuit, respectively as regards the supply circulars by lines 13a and 13b opening into the supply line 13 and in that relates to return circulars, via lines 10a and 10b opening into the return line 10.
  • Individual supply lines 4a, 4b, 4c, 4d etc. cooling plates opening out at the inputs 5a, 5b, 5c and 5d of the internal tubes of the latter, are connected to plates of different levels, rows 0, 1, 2 and 3, since the number of internal tubes varies over the circumference of the blast furnace according to the different zones of the latter. It has been indicated previously that the heat fluxes emitted in a blast furnace vary according to the zones of the blast furnace and it is obvious that the greater the heat flux, the more it is necessary that the density of internal cooling tubes on a given circumference is important. Thus, we therefore vary according to the level of the blast furnace, the number of circulation lines that we have. It is then necessary to introduce inputs 4a, 4b, etc. and to take at the outlets 8a, 8b, 8c, 8d the cooling fluid according to different levels in order to respect the density of circulation lines which it is desired to assign.
  • the greater the heat flux emitted in a blast furnace the more the cooling plates have a dense network of internal tubes, and the more plates are available having the same number of internal tubes, but narrower, because the spacing of these tubes is weaker.
  • FIG. 3 there is shown a developed view of cooling plates placed on the internal surface of the blast furnace on four nozzles.
  • the respective inputs 5 and outputs 8 of the cooling tubes have been represented by black, white circles, hatched or crossed with a horizontal line, to materialize the points corresponding to the same circulation line.
  • This developed view corresponds exactly to the number of rows of rings of cooling plates illustrated in FIG. 2 with partial sections between rows 3 and 5, since rows 3 to 5 inclusive have identical plates and likewise, between rows 7 and 8, and 9 and 11 respectively.
  • a first row 0 of cooling plates is arranged surrounding the nozzles 16. From the supply circular 3a, start sixteen individual supply tubes which are connected to the respective inlets of the sixteen circulation lines for the four lower cooling plates. These sixteen circulation lines run in a roughly vertical plane towards the upper part of the blast furnace.
  • the circulation lines 17, 18, 19 and 20 open respectively at the outlets 17b, 18b, 19b and 20b, at the level of the row plates 5 and the cooling fluid is evacuated via the individual return pipes 17c, 18c, 19c and 20c to the return circular 6b.
  • These lines 17c, 18c, 19c and 20c of FIG. 3 correspond to the reference 7d shown diagrammatically by a single individual pipe in FIG. 2. We therefore see that at row 5 four lines are extracted as represented by the corresponding value -4 on the line extracted from row 5 and ending in the return circular 6b.
  • circulation line 21 connecting the inlet 21 to the outlet 21 crosses all the rows of the plates on the same vertical to exit at row 11.
  • circulation line 22 which is supplied at the level of row 3 of cooling plates by an inlet 22a from the circular 3b by an individual supply pipe (not shown) and from which the coolant is withdrawn at the outlet 22b at row 11 to be evacuated by circular 6a.
  • the illustrated cooling installation comprises, in addition to a main network of substantially vertical fluid circulation lines, an annex network of circulation lines intended to cool localized parts 23 of these plates called "curbs".
  • curbs an annex network of circulation lines intended to cool localized parts 23 of these plates.
  • other internal circulation tubes are placed which are arranged in a horizontal plane. These tubes are added to those of the main network and are also connected as in the case of the main network to their counterparts located above in a vertical plane.
  • a supply circular 3c is connected to the supply line 13 by a line 13c.
  • the annex supply circular 3c supplies the inputs 24 of the internal horizontal cooling tubes at the level of the plate 5.
  • These horizontal internal tubes of the cooling plate 5 are connected to those of the cooling plate of row 6 by a pipe 25 and the outlets 26 of the internal horizontal cooling tubes of the row 6 plate are connected to an intermediate circular 27 of the annex network which performs an even distribution of the cooling fluid.
  • This cooling fluid is sent into the horizontal internal tubes of the row 7 cooling plates, then the outlets 28 of these horizontal tubes of the row 7 plates are connected to the inlets 29 of the horizontal tubes of the row 8 plates, the outlets 30 of which are linked to an annex return circular 6c.
  • This return circular 6c is connected to the return pipe 10 by means of a pipe 10c.
  • Each individual circulation line of the main and annex network can be isolated in the event of failure of one of these lines, for example for leaks.
  • the flow in each of these lines as well as the temperature rises of the fluids can be measured individually along the different levels in a vertical plane.
  • the battery of exchangers may include, as shown in FIG. 2, two exchangers 9a and 9b, and an additional pump 31 connected to the return circuit of the battery of the exchangers 9a and 9b.
  • All the internal tubes of the cooling plates have the same diameter and the speed of the cooling liquid is maintained at a value between 1.2 and 2.0 m / s, in order to obtain an appropriate cooling by eliminating any risk of caking .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (5)

1. Vorrichtung zur Kühlung eines Hochofens mit Hilfe von Kühlplatten, wobei die Platten ringartig aufeinanderfolgend und übereinander an der Innenwandung der Auskleidung des Hochofens angeordnet und von Kanälen durchzogen sind, in welchen eine Kühlflüssigkeit zirkuliert, und wobei die Kanäle zweier in vertikaler Richtung nebeneinander angeordneter Platten so miteinander verbunden sind, daß sie ein Netz vertikal geführter Flüssigkeitskanäle (2) bilden, wobei dieses Netz an seinen jeweiligen Enden mit einem äußeren System für die Kreislaufführung und Abkühlung der Flüssigkeit verbunden ist, das einen geschlossenen, steuerbaren und mit Druck beaufschlagbaren Kreislauf aufweist mit einer Speiseringleitung (3), einer Rückführringleitung (6), einer Anzahl von Wärmetauschern (9), welche mit der Rückführringleitung (6) über eine Rückführleitung (10) und mit der Speiseringleitung (3) über eine Zuleitung (13) verbunden sind, mit einer Anzahl von Kühlflüssigkeits-Rückführpumpen (12a, 12b, 12c) an der Zuleitung (13) und mit mindestens einem Druckbehälter (11) an der Rückführleitung (10) zur Einstellung des gewünschten Drucks, dadurch gekennzeichnet, daß der äußere Kreislauf mindestens eine Speiseringleitung (3) aufweist, welche an die verschiedenen Anschlußstellen (5) der Zirkulationskanäle in den unterschiedlichen Höhen der ringartig angeordneten Kühlplatten angeschlossen ist, sowie mindestens eine Rückführringleitung (6), wobei die Rückführringleitung mit den verschiedenen Auslässen (8) der Zirkulationskanäle auf den unterschiedlichen Höhen der ringartigen Kühlplatten verbunden ist und somit eine variable Dichte der vertikal verlaufenden Kühlflüssigkeits-Zirkulationskanäle am Umfang des Hochofens ergibt, wobei der äußere Kreislauf das Kühlmedium in flüssigem Zustand hält.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß diese ein zusätzliches Netz von Kühlflüssigkeits-Zirkulationskanälen umfaßt, welches aus einer Anzahl innerer Kühlkanäle besteht, die sich horizontal im Innern der Kühlplatten erstrecken, um bestimmte Partien (23) der Platten zu kühlen, wobei die horizontal in zwei in vertikaler Richtung nebeneinander angeordneten Platten verlaufenden Kanäle sowohl untereinander als auch mit einem Teil mit einer Zwischenringleitung (27) zur gleichmäßigen Verteilung verbunden sind und wobei die Einlässe (24) und die Auslässe (30) der zusätzlichen Zirkulationskanäle an eine zusätzliche Speiseringleitung (3c) sowie an eine zusätzliche Rückführringleitung (6c) angeschlossen sind, welche jeweils eine Verzweigung zu der Speiseleitung (13) und der Rückführleitung (10) bilden.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß diese zwei Speiseringleitungen (3a und 3b) sowie zwei Rückführringleitungen (6a und 6b) umfaßt, die mit den Kühlplatten auf unterschiedlichen Höhen verbunden sind.
4. Vorrichtung nach irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die innen verlaufenden Kühlkanäle einen konstanten Durchmesser aufweisen.
5. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Kühlflüssigkeit entweder Wasser oder ein spezielles, bei 300°C resistentes Öl ist.
EP81401167A 1980-07-22 1981-07-22 Kühlvorrichtung für Hochofen und Kühlplatte dafür Expired EP0044792B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81401167T ATE16201T1 (de) 1980-07-22 1981-07-22 Kuehlvorrichtung fuer hochofen und kuehlplatte dafuer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8016105 1980-07-22
FR8016105A FR2487377A1 (fr) 1980-07-22 1980-07-22 Installation de refroidissement pour haut fourneau a l'aide de plaques de refroidissement

Publications (3)

Publication Number Publication Date
EP0044792A2 EP0044792A2 (de) 1982-01-27
EP0044792A3 EP0044792A3 (en) 1982-02-03
EP0044792B1 true EP0044792B1 (de) 1985-10-23

Family

ID=9244380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401167A Expired EP0044792B1 (de) 1980-07-22 1981-07-22 Kühlvorrichtung für Hochofen und Kühlplatte dafür

Country Status (7)

Country Link
US (1) US4398701A (de)
EP (1) EP0044792B1 (de)
AT (1) ATE16201T1 (de)
CA (1) CA1178438A (de)
DE (1) DE3172711D1 (de)
ES (1) ES504454A0 (de)
FR (1) FR2487377A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3333841C1 (de) * 1983-09-20 1984-08-30 Mannesmann AG, 4000 Düsseldorf Metallurgisches Gefaess,insbesondere stationaerer oder auswechselbarer Stahlwerkskonverter
JPH0765974B2 (ja) * 1988-10-26 1995-07-19 セイコー電子工業株式会社 熱分析装置の加熱炉部冷却装置
US5657686A (en) * 1994-02-18 1997-08-19 Stein, Inc. Method and apparatus for controlling floor temperature in an oven
CA2566822C (en) * 2006-11-02 2014-06-03 Innovation F.D.G. Inc. A renewable fuel source burner for a furnace
US10870898B2 (en) * 2010-03-30 2020-12-22 Macrae Technologies, Inc Stave cooler with common coolant collar

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2275515A (en) * 1939-08-03 1942-03-10 George S Dunham Method of and apparatus for cooling blast furnaces
US2333439A (en) * 1941-08-04 1943-11-02 Inland Steel Co Method of and means for cooling high temperature structures
DE1236537B (de) * 1964-11-12 1967-03-16 Arnold Spalckhaver Dipl Ing Verfahren und Einrichtung zur Verdampfungskuehlung von Schachtoefen
DE1533831B2 (de) * 1967-03-18 1975-08-28 Deutsche Babcock & Wilcox-Dampfkessel-Werke Ag, 4200 Oberhausen Verfahren zum Heißkühlen eines Schachtofens, insbesondere Hochofens
FR2054727A5 (en) * 1969-07-24 1971-05-07 Inst Ochistke Tekhno Cooling unit for blast furnaces
DE2017569A1 (en) * 1970-04-13 1971-10-28 Rohde, Dr.-Ing. Ewald W., 5905 Freudenberg Separate loop blast furnace tuyere cooling circuit
DE2031379A1 (en) * 1970-06-25 1971-12-30 Rohde, Ewald, W , Dr Ing, 5905 Freundenberg Cooling system for blast furnace tuyeres - using secondary cooling circuit
FR2119167A5 (fr) * 1970-12-22 1972-08-04 Wieczorek Julien Blindage de haut-fourneau à haute-pression et refroldissement progressif pour usine sidérurgique littorale.
DE2403741C2 (de) * 1974-01-26 1975-05-22 Demag Ag, 4100 Duisburg Anlage zur Not-Versorgung von Schachtöfen, insbesondere Hochöfen, mit Kühlwasser
DE2439908A1 (de) * 1974-08-20 1976-03-04 Oschatz Gmbh Anordnung fuer die kuehlung eines hochofens
US4061317A (en) * 1977-02-23 1977-12-06 Sergei Mikhailovich Andoniev Blast furnace bottom cooling arrangement
US4250840A (en) * 1979-02-15 1981-02-17 Kudinov Gennady A Blast furnace cooling arrangement

Also Published As

Publication number Publication date
CA1178438A (fr) 1984-11-27
ES8206632A1 (es) 1982-08-16
ATE16201T1 (de) 1985-11-15
FR2487377B1 (de) 1984-12-28
ES504454A0 (es) 1982-08-16
FR2487377A1 (fr) 1982-01-29
US4398701A (en) 1983-08-16
EP0044792A2 (de) 1982-01-27
DE3172711D1 (en) 1985-11-28
EP0044792A3 (en) 1982-02-03

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