EP0044792A2 - Kühlvorrichtung für Hochofen und Kühlplatte dafür - Google Patents

Kühlvorrichtung für Hochofen und Kühlplatte dafür Download PDF

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Publication number
EP0044792A2
EP0044792A2 EP81401167A EP81401167A EP0044792A2 EP 0044792 A2 EP0044792 A2 EP 0044792A2 EP 81401167 A EP81401167 A EP 81401167A EP 81401167 A EP81401167 A EP 81401167A EP 0044792 A2 EP0044792 A2 EP 0044792A2
Authority
EP
European Patent Office
Prior art keywords
cooling
plates
circular
return
fluid
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
EP81401167A
Other languages
English (en)
French (fr)
Other versions
EP0044792A3 (en
EP0044792B1 (de
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
USINOR SA
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 USINOR SA, Union Siderurgique du Nord et de lEst de France SA USINOR filed Critical USINOR SA
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 whose walls are subjected to high heat fluxes and more particularly to the cooling of blast furnaces using cooling plates.
  • Modern blast furnaces are more and more operated at speeds and pressure levels such that it is important to control heat flows and their transfer, especially in areas of displays, stomach, bottom of tank and mid -tank.
  • the shield does not reach the temperature levels or does not undergo temperature variations which could jeopardize its resistance to the forces to which it is subjected.
  • 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.
  • 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 the flows. thermal 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 lines of circulation of the fluid, characterized in that this network is connected at each of its ends to an external circuit for circulation and cooling of the fluid, thus defining a reinforced, forced and pressurized circuit in which the cooling fluid is kept in the liquid phase.
  • 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.
  • 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 at the upper and lower parts of the latter and are connected to the adjacent upper plate and to the adjacent plate immediately below in a vertical plane, to define a circulation line made up of all the internal tubes connected together defined by general reference 2.
  • a circular supply line 3 surrounding the blast furnace at its bottom comprises a set of individual supply lines 4 which are respectively connected to the inlets 5 of the circulation lines 2.
  • a circular return line 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 connected respectively at its bottom part to the supply 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 supply 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 feed circular 3 by a feed line 13.
  • This battery of pumps comprises two electric pumps 12a and 12b and a diesel backup pump 12c.
  • 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 cricular 3.
  • the expansion tank comprises a level regulator 32 which controls a valve 33 for the intake of the auxiliary cooling fluid, 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 maintained 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 adjusted 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 pipe 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 O 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 system 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 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 quite 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 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 comprise a dense network of internal tubes, and the more plates are available having the same number of internal tubes, but narrower, because the center distance of these tubes is smaller.
  • 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 O 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 traffic lines travel in an approximately 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. It can therefore be seen that at row 5 are extracted four lines as shown 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 21a to the outlet 21b 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 line (not shown) and whose fluid cooling is taken at the outlet 22b at the level of row 11 to be evacuated by the circular 6a.
  • the cooling installation illustrated 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 power supply circular annex 3c supplies the inputs 24 of the horizontal internal 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 rank 6 by a pipe 25 and the outputs 26 of the internal cooling tubes horizontal 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 coolant 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 of which 30 are connected 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 .

Landscapes

  • 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)
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
FR8016105A FR2487377A1 (fr) 1980-07-22 1980-07-22 Installation de refroidissement pour haut fourneau a l'aide de plaques de refroidissement
FR8016105 1980-07-22

Publications (3)

Publication Number Publication Date
EP0044792A2 true EP0044792A2 (de) 1982-01-27
EP0044792A3 EP0044792A3 (en) 1982-02-03
EP0044792B1 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) ES8206632A1 (de)
FR (1) FR2487377A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552106A1 (fr) * 1983-09-20 1985-03-22 Mannesmann Ag Cuve metallurgique notamment un convertisseur d'acierie stationnaire ou interchangeable

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
LU500112B1 (en) * 2021-04-30 2022-10-31 Wurth Paul Sa Cooling system of a metallurgical furnace

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552106A1 (fr) * 1983-09-20 1985-03-22 Mannesmann Ag Cuve metallurgique notamment un convertisseur d'acierie stationnaire ou interchangeable
GB2146749A (en) * 1983-09-20 1985-04-24 Mannesmann Ag A metallurgical vessel

Also Published As

Publication number Publication date
DE3172711D1 (en) 1985-11-28
ES504454A0 (es) 1982-08-16
US4398701A (en) 1983-08-16
FR2487377B1 (de) 1984-12-28
FR2487377A1 (fr) 1982-01-29
ATE16201T1 (de) 1985-11-15
EP0044792A3 (en) 1982-02-03
CA1178438A (fr) 1984-11-27
ES8206632A1 (es) 1982-08-16
EP0044792B1 (de) 1985-10-23

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