EP0118136A1 - Verfahren zur Ausbesserung schadhafter Kühlelemente eines Hochofens - Google Patents

Verfahren zur Ausbesserung schadhafter Kühlelemente eines Hochofens Download PDF

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Publication number
EP0118136A1
EP0118136A1 EP84200072A EP84200072A EP0118136A1 EP 0118136 A1 EP0118136 A1 EP 0118136A1 EP 84200072 A EP84200072 A EP 84200072A EP 84200072 A EP84200072 A EP 84200072A EP 0118136 A1 EP0118136 A1 EP 0118136A1
Authority
EP
European Patent Office
Prior art keywords
cooling
grooves
blast furnace
pipes
boxes
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
EP84200072A
Other languages
English (en)
French (fr)
Other versions
EP0118136B1 (de
Inventor
Jaakko Tenkula
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.)
Telatek Oy
Original Assignee
Telatek Oy
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 Telatek Oy filed Critical Telatek Oy
Priority to AT84200072T priority Critical patent/ATE22117T1/de
Publication of EP0118136A1 publication Critical patent/EP0118136A1/de
Application granted granted Critical
Publication of EP0118136B1 publication Critical patent/EP0118136B1/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 a method for the rearrangement of damaged cooling in a blast furnace.
  • the method is of the type disclosed in the preamble of Claim 1.
  • cooling has a primary effect on the durability of the furnace, since practice has shown that, while the cooling functions, the durability of the refractory lining on the interior surface of the blast-furnace shaft is good, but if the cooling for one reason or another stops functioning even partly, there results a rapid wearing of the refractory lining owing to both chemical reactions and mechanical wear.
  • One cooling system commonly used at present comprises a cooling box cast from cast-iron, inside which there is a cooling-pipe system installed in place at the casting stage, cooling water being circulated in the pipe system. Conventionally there are, on that side of the cooling box which faces the shaft, pocket-like depressions, in which bricks are laid. Such cooling boxes are installed around the entire circumference of the lower part of the shaft, and when the system is in order, the cooling effect achieved with them is good.
  • the space available is very small, and after the blast furnace has been stopped the furnace temperature is still about 200 °C, in addition to which the time available for the work is in general quite limited, since the longer the work lasts, the greater are the productional losses to be expected.
  • the object of the present invention is to avoid the disadvantages of the above-mentioned known repairing methods and to provide a method by means of which the cooling of a blast furnace can be restored at least in part in a very rapid but simple manner.
  • the characteristics of the method are given in the accompanying claims.
  • the basic idea of the invention is that suitable grooves are worked on the outer surface of the cooling box by, for example,grinding or by some other similar method, the grooves extending approximately to the level at which the previous cooling pipe system has been.
  • these grooves there are installed, by means of a suitable mix, new cooling pipes, which are connected to the water-circulating mechanism and which thus restore the cooling of the blast furnace to its previous stage, or at least to a substantial degree, whereby full repairs of the blast furnace can be avoided. Since the method according to the invention is relatively rapid to carry out, long stoppages, which cause productional losses, are also avoided.
  • FIG. 1 shows a cooling box 1, which thus consists of a cast-iron piece inside which there is cast a cooling-pipe system 3. On the outer side of this piece there are worked, by means of the mechanism 4, 5 depicted by way of example in Figure 1, grooves 2, in which new cooling pipes can be installed, the pipes being fastened in the grooves by means of a suitable, heat conductive mix, in addition to which it is necessary in practice only to connect the circulating-water system to the said pipes.
  • Figure 2 depicts a vertical section of the cooling box according to Figure 1, the structure being visible also from the rear side of the cooling box 1. On that side which faces the bosh there are, as mentioned previously, depressions 7 for bricks. In other words, the bricklaying is started by laying bricks first in the depressions 7.
  • the new cooling pipe 6 has been drawn in the cross sectional figure by an uninterrupted line and the old pipe, which has at this stage already been worked off, is indicated in Figure 2 by dotted lines.
  • the work blade is indicated by numeral 5 by way of reference.
  • FIGS 5 and 6 depict an embodiment fully corresponding to the embodiment depicted in Figures 3 and 4, but the cooling element has in this case been installed in a circular groove, which has been ground by means of a specific tool suitable for this purpose.
  • the cooling efficiency achieved using the embodiment depicted in Figures 1 and 2 substantially corresponds to the efficiency of the original cooling system, whereas the circular installation of the cooling element depicted in Figures 5 and 6 produces a 50-percent cooling efficiency as compared with the original cooling. Even a 50-percent . efficiency is highly significant, for it has been observed in practice that by means of it full repairs can be postponed even several years.
  • the method according to the invention has been in trial use, during which it has been observed that the making of two circular grooves according to the invention and the installation of the cooling pipe in the grooves takes a little over 24 hours, which is a very tolerable period in terms of a productional stoppage.
  • the cooling of several cooling boxes has to be repaired in a blast furnace, it means that, if a moderate repair period is desired, several grinding tools must be used for the work, working on each groove simultaneously.
  • the blast furnace has previously been repaired thoroughly at intervals of 5-6 years, and as, by the method according to the invention, a lengthening of u p to several years is achieved in the interval between thorough repairs, the invention is a great step forward financially in the said field. In practice the savings amount to millions, even tens of millions of Finnish marks.

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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)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Soy Sauces And Products Related Thereto (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
EP84200072A 1983-01-27 1984-01-20 Verfahren zur Ausbesserung schadhafter Kühlelemente eines Hochofens Expired EP0118136B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84200072T ATE22117T1 (de) 1983-01-27 1984-01-20 Verfahren zur ausbesserung schadhafter kuehlelemente eines hochofens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI830290A FI68263C (fi) 1983-01-27 1983-01-27 Foerfarande foer omarrengering av skadad kylning speciellt i en masugn
FI830290 1983-01-27

Publications (2)

Publication Number Publication Date
EP0118136A1 true EP0118136A1 (de) 1984-09-12
EP0118136B1 EP0118136B1 (de) 1986-09-10

Family

ID=8516665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84200072A Expired EP0118136B1 (de) 1983-01-27 1984-01-20 Verfahren zur Ausbesserung schadhafter Kühlelemente eines Hochofens

Country Status (5)

Country Link
EP (1) EP0118136B1 (de)
AT (1) ATE22117T1 (de)
DE (1) DE3460635D1 (de)
EG (1) EG16426A (de)
FI (1) FI68263C (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519553A1 (de) * 1991-06-19 1992-12-23 Hoogovens Groep B.V. Verfahren zur Instandsetzung der feuerfesten Bekleidung einer Schachtofenwand
EP1847622A1 (de) * 2006-04-18 2007-10-24 Paul Wurth S.A. Verfahren zur Herstellung einer Plattenkühler für metallurgische Öfen und so hergestellte Plattenkühler

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379427A (en) * 1965-02-03 1968-04-23 Kuznetsky Metall Kom Lining of the internal surface of a blast furnace
US4071230A (en) * 1977-03-23 1978-01-31 Anatoly Vasilievich Zherdev Contrivance for the protection of the walls of a shaft furnace from the heat effect of metallurgical process
FR2386795A1 (fr) * 1977-04-06 1978-11-03 Steinmueller Gmbh L & C Element refrigerant pour parois de recipients exposees a des temperatures elevees

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379427A (en) * 1965-02-03 1968-04-23 Kuznetsky Metall Kom Lining of the internal surface of a blast furnace
US4071230A (en) * 1977-03-23 1978-01-31 Anatoly Vasilievich Zherdev Contrivance for the protection of the walls of a shaft furnace from the heat effect of metallurgical process
FR2386795A1 (fr) * 1977-04-06 1978-11-03 Steinmueller Gmbh L & C Element refrigerant pour parois de recipients exposees a des temperatures elevees

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 5, no. 188, 27 November 1981; & JP-A-56 112 407 *
PATENT ABSTRACTS OF JAPAN, vol. 5, no. 45, 25 March 1981; & JP-A-56 000 211 *
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 90, 27 May 1982; & JP-A-57 019 309 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519553A1 (de) * 1991-06-19 1992-12-23 Hoogovens Groep B.V. Verfahren zur Instandsetzung der feuerfesten Bekleidung einer Schachtofenwand
EP1847622A1 (de) * 2006-04-18 2007-10-24 Paul Wurth S.A. Verfahren zur Herstellung einer Plattenkühler für metallurgische Öfen und so hergestellte Plattenkühler
WO2007118752A1 (en) * 2006-04-18 2007-10-25 Paul Wurth S.A. Method of manufacturing a stave cooler for a metallurgical furnace and a resulting stave cooler
CN101421422B (zh) * 2006-04-18 2011-12-21 保尔伍斯股份有限公司 制造冶金炉用冷却壁的方法及所制造的冷却壁

Also Published As

Publication number Publication date
FI68263B (fi) 1985-04-30
EP0118136B1 (de) 1986-09-10
DE3460635D1 (en) 1986-10-16
FI830290L (fi) 1984-07-28
ATE22117T1 (de) 1986-09-15
FI830290A0 (fi) 1983-01-27
EG16426A (en) 1988-01-31
FI68263C (fi) 1985-08-12

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