EP0258929B1 - Oxigenstahlwerk mit Sublanzeneinrichtung - Google Patents

Oxigenstahlwerk mit Sublanzeneinrichtung Download PDF

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Publication number
EP0258929B1
EP0258929B1 EP19870201570 EP87201570A EP0258929B1 EP 0258929 B1 EP0258929 B1 EP 0258929B1 EP 19870201570 EP19870201570 EP 19870201570 EP 87201570 A EP87201570 A EP 87201570A EP 0258929 B1 EP0258929 B1 EP 0258929B1
Authority
EP
European Patent Office
Prior art keywords
sublance
converter
oxygen
hood
entrance hole
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
EP19870201570
Other languages
English (en)
French (fr)
Other versions
EP0258929A1 (de
Inventor
Petrus Cornelis Hendrikus Zonneveld
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.)
Tata Steel Ijmuiden BV
Original Assignee
Hoogovens Groep BV
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 Hoogovens Groep BV filed Critical Hoogovens Groep BV
Publication of EP0258929A1 publication Critical patent/EP0258929A1/de
Application granted granted Critical
Publication of EP0258929B1 publication Critical patent/EP0258929B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4673—Measuring and sampling devices

Definitions

  • the invention relates to an oxygen steelmaking plant having at least one steel converter, a hood for the converter, two pivoting arms for carrying oxygen lances and a sublance installation which comprises a carriage, a sublance suspended from the carriage and a pick up station for a sensor which is to be transported by the sublance into the converter, the hood having a lance entrance hole and a sublance entrance hole.
  • the invention also relates to a method for operating a sublance installation in such an oxygen steelmaking plant.
  • Oxygen steelmaking plants of this type are in general use in the iron and steel industry.
  • the molten pig iron is processed in the converter until the required composition of the liquid pig iron bath is achieved.
  • Oxygen is blown into the liquid iron bath from above using an oxygen lance, to burn up certain impurities and raise the temperature of the liquid iron bath.
  • an inert gas may be injected through a few bottom bricks of the converter, in order to promote good mixing of the liquid iron bath.
  • the quality of the measurement is determined by inter alia the time of the measurement.
  • An early measurement is unusable because not all the scrap put in the converter will be completely molten, where the temperature of the liquid iron bath is still below 1536 ° C.
  • a correct prediction of the final composition and final temperature of the liquid iron bath where a long blowing time remains is much more difficult.
  • a somewhat later measurement is the obvious answer, but here there is a limit in the reduction in the quantity of carbon as a result of blowing. As a result of this reduction, the stirring effect of combustion is reduced and as a result the homogeneity of the liquid iron bath falls. The measurement is therefore unreliable.
  • the measurement point must be as great as possible.
  • the measurement point should not be too close to the wall of the converter.
  • the measurement sensor must be placed just below the iron/slag interface in the liquid iron bath. The right immersion depth depends on the size of the converter used.
  • the object of the present invention is to provide a sublance installation which avoids the necessity for expensive additions or changes to an existing oxygen steelmaking plant and by which limitations in movement of the sublance described above are avoided. Thus the desired freedom of operation is made possible.
  • the invention is also applicable to the construction of new oxygen steelmaking plants.
  • the invention is set out in claim I.
  • the sublance can be moved between a pickup device for a sensor and a sublance entrance hole.
  • the first and second sublance entrance holes are located symmetrically with respect to the lance entrance hole. This improves the interchangeability of the sublance measurement via either of the sublance entrance holes, because there is no difference in the position of the two sublance entrance holes with respect to the lance entrance hole. It is also preferable for the pickup stations to be located symmetrically with respect to the converter, which has the advantage that the movement pattern of the sublance is independent of the choice of pickup station and entrance hole, and only the transport direction has to be adapted according to the chosen pickup station or entrance hole.
  • the first pickup station On a hood carriage which carries the hood and is movable away from the converter.
  • the oxygen steelmaking plant has at least two steel converters, each equipped with hood, pivoting arms and sublance installation as described in claim I, it is preferable, at least from the point of view of cost, to locate a pickup station between each adjacent pair of the converters, this pickup station being used for both converters of the pair.
  • the invention also relates to a method for operating a sublance installation in an oxygen steelmaking plant in accordance with the invention, as set out in claim 6.
  • Fig. I shows, midway between the casting bay I and the charging bay 2, the converter bay 3 of an oxygen steelmaking plant.
  • the converter 4 is installed in the limited space of the bay 3 and has a hood 5 which is partly shown.
  • the hood 5 is movable away from the converter on a carriage.
  • Located on the line of the axis of the converter is a lance entrance hole 6 in the hood, see Fig. 2.
  • An oxygen lance 7 is shown schematically in Fig. I. Fig.
  • each converter has two pivoting arms 17,18 pivotable around respective axes 17a,18a, each of which can carry an oxygen lance at its end remote from the pivoting axis, so as to bring the lance into place above the lance entrance hole 6 of the hood, whereafter the lance is lowered through the hood into the converter.
  • Two pivoting arms 17,18 are provided so that the lance can be changed without halting production significantly.
  • the converter 4 also has associated with it a sublance installation, consisting of a carriage 9 which moves on a platform 8 above the converter.
  • a sublance 10 is suspended from the carriage 9.
  • the carriage 9 includes a device II by which the height of the sublance 10 can be adjusted.
  • the sublance is able to move, under control of the carriage 9, between two pickup stations 19,20 for measurement sensors or other probes which are located approximately symmetrically on each side of the converter beneath the path of movement of the carriage 9.
  • the mechanism by which the sublance picks up a probe or sensor is known and does not need to be described.
  • the hood 5 has two sublance entrance holes 13,14 located symmetrically with respect to the lance entrance hole 6 in the upper surface of the hood and beneath the path of movement of the carriage 9.
  • the sublance After picking up a probe or sensor from one of the pickup stations 19,20, the sublance carries it to above the closer of the two sublance entrance holes 13,14 and then lowers it through the hole into the converter. After the desired measurement or other operation has been performed in the converter, the sublance then lifts the probe or sensor out of the converter and returns it to the pickup station.
  • Figs. I and 3 show that, when one of these pivoting arms 17,18 is in position swung across the converter with the sublance 7 operating in the converter, the sublance 10 cannot move freely across the whole width of the converter, since its path of movement intersects the arm 17 or 18. Because, according to the present invention two pick- up stations 19,20 and two sublance entrance holes 13,14 are provided, the sublance is still able to move to one of the pickup stations, being the one on the side of the converter opposite the side from which the operating one of the arms 17,18 moves. The sublance can then carry a probe or sensor to or from the sublance entrance hole 13 or 14 on the same side as the chosen pickup station.
  • the Fig. 3, righthand side shows in full lines the arm 17 in the non-operating position swung away from the converter while the arm 18 is in the operating position above the converter. The reverse positions of the arms are shown by the broken lines in Fig. 3.
  • Fig. 3 also shows that the two adjacent converters 4,22 are associated with a total of three pickup stations 19,20 and 21.
  • the intermediate pickup station 19 is common to the two converters and is used by the sublances of both converters.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Claims (6)

1. Oxigenstahlwerk mit einem Stahlkonverter (4), einer über dem Konverter anordenbaren Haube (5) für den Konverter, zwei Schwenkarmen (17, 18) zum Tragen von Sauerstofflanzen (7), welche Arme jeweils schwenkbar sind, um eine Sauerstofflanze über dem Konverter in Position zu bringen, und mit einer Sublanzeneinrichtung, welche eine Sublanze (10), einen zum Transport der Sublanze entlang einer, die Bahn von zumindest einem der Schwenkarme (17, 18) schneidenden Bahn bewegbaren Träger (9), auf dem die Sublanze (10) aufgehängt ist, und eine Aufnahmestation (19) umfaßt, an der die Sublanze einen, von der Sublanze zum Ausführen einer Messung ins Innere des Konverters zu transportierenden Fühler aufnimmt, wobei die Haube ein Lanzeneintrittsloch (6) zum Einsetzen der Sauerstofflanzen in den Konverter und ein Sublanzeneintrittsloch (13) zum Einsetzen einer Sublanze in den Konverter aufweist, dadurch gekennzeichnet, daß die Haube ein zweites Sublanzeneintrittsloch (14) ebenfalls zum Einsetzen der Sublanze in den Konverter aufweist und die Sublanzeneinrichtung eine zweite Aufnahmestation (20) zum Aufnehmen eines Fühlers mit der Sublanze aufweist, wobei besagtes erstes Sublanzeneintrittsloch (13) und besagte erste Aufnahmestation (19) einerseits und das zweite Sublanzeneintrittsloch (14) und die zweite Aufnahmestation (20) anderseits an gegenüberliegenden Seiten des Lanzeneintrittsloches (6) angeordnet sind, und der Träger für den Transport der Sublanze zu besagten beiden Aufnahmestationen (19, 20) und zu besagten beiden Sublanzeneintrittslöchern (13, 14) angeordnet ist.
2. Oxigenstahlwerk gemäß Anspruch 1, wobei das erste Sublanzeneintrittsloch (13) und das zweite Sublanzeneintrittsloch (14) symmetrisch bezüglich des Lanzeneintrittsloches (6) angeordnet sind.
3. Oxigenstahlwerk gemäß Anspruch 1 oder Anspruch 2, wobei die Aufnahmestationen nahe dem Konverter, an gegenüberliegenden Seiten, symmetrisch angeordnet sind.
4. Oxigenstahlwerk gemäß irgendeinem der Ansprüche 1-3, wobei die Haube (5) auf einem Haubenträger montiert ist und die erste Aufnahmestation auf dem Haubenträger angeordnet ist.
5. Oxigenstahlwerk gemäß irgendeinem der Ansprüche 1-4, welches zumindest zwei, mit Haube, Schwenkarmen und Sublanzeneinrichtung gemäß Anspruch 1 ausgerüstete Stahlkonverter umfaßt, wobei zwischen jedem benachbarten Paar von Konvertern eine besagte Aufnahmestation angeordnet ist, welche für beide Konverter des Paares benützt wird.
6. Verfahren zum Betreiben einer Sublanzeneinrichtung in einem Oxigenstahlwerk gemäß irgendeinem der vorhergehenden Ansprüche, wobei (a) der bewegbare Träger der Sublanze in einer Position auf einer, von der rechten und der linken Seite des Konverters ausgewählten ersten Seite angeordnet wird, (b) dann eine Sauerstofflanze aus einer Ruhestellung auf der anderen Seite, von der rechten und der linken Seite des Konverters in eine Arbeitsstellung bewegt wird, (c) dann der bewegbare Träger zumindest einmal zwischen der, an der besagten ersten Seite des Konverters angeordneten Aufnahmestation und einer Arbeitsposition der Sublanze bewegt wird, welche Arbeitsposition dem Sublanzeneintrittsloch entspricht, welches bezogen auf das Lanzeneintrittsloch an besagter ersten Seite des Konverters liegt.
EP19870201570 1986-08-29 1987-08-19 Oxigenstahlwerk mit Sublanzeneinrichtung Expired EP0258929B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8602195A NL8602195A (nl) 1986-08-29 1986-08-29 Oxystaalfabriek.
NL8602195 1986-08-29

Publications (2)

Publication Number Publication Date
EP0258929A1 EP0258929A1 (de) 1988-03-09
EP0258929B1 true EP0258929B1 (de) 1989-10-18

Family

ID=19848474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870201570 Expired EP0258929B1 (de) 1986-08-29 1987-08-19 Oxigenstahlwerk mit Sublanzeneinrichtung

Country Status (3)

Country Link
EP (1) EP0258929B1 (de)
DE (1) DE3760812D1 (de)
NL (1) NL8602195A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2038823A1 (en) * 1990-03-30 1991-10-01 Akio Nagamune In-furnace slag level measuring method and apparatus therefor
CN109777910A (zh) * 2019-03-26 2019-05-21 王军 用于炼钢转炉检测的副枪
CN113604625A (zh) * 2021-07-15 2021-11-05 日照钢铁控股集团有限公司 一种转炉炉口段烟道安装找正的方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1322261A (en) * 1970-08-19 1973-07-04 Ashmore Benson Pease & Co Ltd Oxygen lance and probe guide apparatus
NL185944C (nl) * 1977-08-30 1990-08-16 Hoogovens Groep Bv Ketel boven een converter voor de staalproductie, voorzien van drukmeetpunten.
DE2753161C3 (de) * 1977-11-29 1980-10-09 M.A.N. Maschinenfabrik Augsburg- Nuernberg Ag, 8900 Augsburg Verfahren und Vorrichtung zum Wechseln von MeB- und/oder Probennahmesonden für Stahlschmelzen
AT387855B (de) * 1982-12-09 1989-03-28 Voest Alpine Ag Sondenmanipulator

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Publication number Publication date
NL8602195A (nl) 1988-03-16
DE3760812D1 (en) 1989-11-23
EP0258929A1 (de) 1988-03-09

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