EP0109916B1 - Vorrichtung zum Beliefern eines zu frischenden Metallbades mit gasförmigen und festen Stoffen - Google Patents

Vorrichtung zum Beliefern eines zu frischenden Metallbades mit gasförmigen und festen Stoffen Download PDF

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Publication number
EP0109916B1
EP0109916B1 EP83630174A EP83630174A EP0109916B1 EP 0109916 B1 EP0109916 B1 EP 0109916B1 EP 83630174 A EP83630174 A EP 83630174A EP 83630174 A EP83630174 A EP 83630174A EP 0109916 B1 EP0109916 B1 EP 0109916B1
Authority
EP
European Patent Office
Prior art keywords
cap
block
nozzles
lance
blowing
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
EP83630174A
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English (en)
French (fr)
Other versions
EP0109916A1 (de
Inventor
Robert Mercatoris
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.)
Mecanarbed Dommeldange Sa Rl
Original Assignee
Mecanarbed Dommeldange Sa Rl
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Filing date
Publication date
Application filed by Mecanarbed Dommeldange Sa Rl filed Critical Mecanarbed Dommeldange Sa Rl
Priority to AT83630174T priority Critical patent/ATE29266T1/de
Publication of EP0109916A1 publication Critical patent/EP0109916A1/de
Application granted granted Critical
Publication of EP0109916B1 publication Critical patent/EP0109916B1/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
    • C21C5/4606—Lances or injectors

Definitions

  • the invention relates to a device for supplying gaseous and solid materials, in particular oxygen and carbonaceous materials, to a metal bath in the process of refining by top blowing, as set out in the preamble of claim main.
  • the supply of the metal bath with oxygen must comprise on the one hand an amount of oxygen, penetrating into the metal in order to meet carbon there and to form carbon monoxide gas and on the other hand an amount of oxygen distributed over the surface of the bath in order to burn the said carbon monoxide, formed during the refining.
  • the aim is to recarburize the bath in order to have an increased energy capacity, the energy released by the oxidation of carbon in the resp resp. carbon monoxide above the surface, being ultimately intended to melt in the bath significant amounts of solid scrap.
  • Patent LU-A-78,906 describes a lance head, provided with a central nozzle, the axis of which coincides with the axis of the lance, surrounded by two series of nozzles more or less inclined relative to the nozzle central.
  • a reliable cooling circuit must also be provided in the device while considering the need to limit the scope of this circuit to a minimum, both from the point of view of space and of the quantities of cooling fluid to be used, given that in the event of a fluid leakage, the latter should only reach the crucible in quantities reduced to a strict minimum.
  • the device as complex as its functions, should be accessible to a simple and at least relatively inexpensive manufacturing method.
  • the block and the cap are provided with a central perforation, the diameter of the block perforation being greater than that of the cap. It is in these orifices that a central tube is housed through which it is possible to transport either gas alone or solid material suspended in a carrier gas and there will automatically be a conduit enveloping said central tube; which conduit gives access to the passage between the block and the cap. Thanks to this feature, a device is obtained capable of conveying a given material, possibly not compatible with other materials which are conveyed through the same device, and where the materials are protected against each other by a protective screen which is consisting of a fluid which acts at the same time as a cooling fluid.
  • the block has on its upper face circular end pieces, concentric with respect to the vertical axis of the lance head.
  • These nozzles are arranged so as to delimit annular passages in which the nozzles terminate, so that it suffices to connect the nozzles to concentric tubes to obtain a device having several independent circuits from one another.
  • cap is also connected to a tube which forms the casing of the body of the lance.
  • the main advantage of the device according to the invention lies in the fact that it offers the possibility of conveying and cutting at the same time materials which are not compatible with each other and that the means of protection provided to avoid physical contact between these materials - in this case carbon and oxygen - at the same time fulfills the function of cooling agent.
  • the head essentially consists of the block, the cap and several tubes, therefore of easily achievable elements.
  • FIG. 1 shows a section through the monolithic block of the lance head
  • FIG. 2 shows a section through the outer collar
  • FIG. 3 shows the entire lance head where block is inserted in the cap.
  • the block (1) has a central perforation (10), in the direction of the vertical axis, which is intended to receive the conduit for solid materials and at the same time to form the conduit for supplying the cooling and protective fluid. .
  • nozzles (20, 21 and 22) which can be used for blowing oxygen.
  • the nozzle (20) which is only slightly inclined relative to the vertical axis can convey the refining oxygen, while the oblique nozzles (21, 22) bring the post-combustion oxygen which must not penetrate in the bath.
  • Fig. 1 shows that the loc (1) has on its upper face the circular, concentric ends (5, 6, 7, 8) and it becomes clear that these ends delimit conduits.
  • the end piece (5) forms the central passage (10); at the same time it forms together with the end piece (6) a tubular conduit delimiting the space in which the nozzle ends (20), the end pieces (6 and 7) delimit another tubular conduit in which ends the nozzle (21) and finally, the same is true for the end pieces (7 and 8) with respect to the nozzle (22).
  • the various tubular conduits can constitute the bases common to several nozzles of the same type; so we can predict p. ex. 3 nozzles (20), 3 nozzles (21) and 6 nozzles (22).
  • Fig. 2 shows the cap (2) which is provided with a neck (3).
  • This neck is intended to serve as a support for the central tube which will convey the solid material. It can be connected to the cap or be an integral part.
  • the cap has the perforations (10c, 20c, 21c and 22c) which correspond to the nozzles (10, 20, 21, and 22) of the block according to FIG 1. These perforations can also be made after assembly.
  • FIG. 3 where it is shown the entire lance head.
  • the tube (4) connected to the neck (3) of the cap (2); this tube (4) can convey carbon suspended in an appropriate carrier gas.
  • the different end pieces which are arranged on the upper surface of the block (1) are connected to concentric tubes (5a, 6a, 7a, and 8a).
  • the passage between the tube (5a) resp. the end piece (5) and the tube (4) can be used according to the invention as input corrugation for a cooling and protective fluid.
  • the passage between the tubes (5a and 6a) resp. (6a and 7a) resp. (7a and 8a) lead to the nozzles (20) rep. (21) resp. (22).
  • the device according to the invention can, thanks to its particular design, be manufactured according to conventional and relatively inexpensive methods.
  • the block (1) lends itself to manufacture by mold casting; the perforations can easily be obtained by drilling.
  • the formation of the lower ends can be provided in the arrangement of the mold, as well as that of the nozzles.
  • the upper, concentric ends they can be obtained by turning and milling.
  • the block (1) is usefully made of copper, just like the cap (2).
  • the block and the cap can also form a monolithic unit, relatively easy to produce by casting in a mold. Either we prefer this form of execution or the execution where the block and the cap form individual parts, it is easy to recover the block part in case of damage to the cap part.
  • the tube (4) can be connected to the neck (3) by screwing or by any other sealed assembly means; one can usefully provide an O-ring not shown, between the top of the neck (3) and the adjacent part of the tube (4).
  • the lance protection / cooling circuit is a closed circuit which comprises between the inlet duct in the lance and the outlet duct, outside the lance body, a pump, a heat exchanger heat, a buffer tank as well as means for continuously measuring the pressure and inlet-outlet flow rates of the fluid conveyed in said circuit.
  • the dying instruments are connected to an alert system so that a loss of pressure, or a difference between the input-output flow rates indicative of any deterioration in the circuit, can be directly signaled for intervention. adequate.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (7)

1. Blaslanze zum Beliefern eines Metallbades welches durch Aufblasen gefrischt wird, mit Gasen und mit Feststoffen, insbesondere mit Sauerstoff und mit Kohlenstoffträgern, welche Lanze einen Kopf besitzt, de die Mündungen mehrerer Düsen (20, 21, 22) aufweist, sowie konzentriche Rohre (5a, 6a, 7a, 8a, 9) zum Leiten der gasförmigen und der festen Stoffe sowie einer Kühlflüssigkeit bis zum Kopf hin, dadurch gekennzeichnet, dass dieser Kopf ein monolithischer Block (1) ist, welcher eine zentrale Bohrung (10), Düsen (20, 21, 22), sowie Randstücke (20b, 21b, 22b) aufweist, die die Düsen nach Aussen hin verlängern, wobei der Kopf sich in einer Kalotte (2) befindet welche Oeffnungen (20c, 21c, 22c) hat, die der Lage der Düsenmündungen entsprechen, dass der Block (1) und die Kalotte (2) mittels der Randstücke (20b, 21b, 22b) voneinander beabstandet sind, dass ein Rohr (4), welches sich innerhalb der zentralen Bohrung (10) befindet, mit den Rändern einer in die Kalotte (2) praktizierten Oeffnun (10c) verbunden ist und, dass der Raum zwischen dem Block (1) und der Kalotte (2) bzw. zwischen dem Block (1) und dem Rohr (4) den Durchgang führ ein flüssiges Kühlmittel bildet.
2. Blaslanze nach dem Anspruch 1, dadurch gekennzeichnet, dass der Block (1) auf seiner oberen Fläche zu der Lanzenachse konzentrische Randstüke (5, 6, 7, 8) aufeist, welche mit den konzentrischen Rohren (5a, 6a, 7a, 8a) verbunden sind.
3. Blaslanze nach dem Anspruch 1, dadurch gekennzeichnet, dass die Kalotte (2) mit dem Rohr (9), das die Hülle des Lanzenkörpers darstellt, verbunden ist.
4. Blaslanze nach einem der Ansprüche 1-3, dadurh gekennzeichnet, dass das Rohr (4) konzentrisch zur Lanzenachse ist, während die Düsen (20, 21, 22) um vorzugweise 10-15°, bzw. 30-45°, bzw. 60-120° zur Lanzenachse geneigt sind.
5. Blaslanze nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass die sich auf der oberen Fläche des Blocks (1) befindlichen, konzentrischen Randstücke (5, 6, 7, 8) ringförmige Räume begrenzen, wobei jeder Raum mit Düsen (20, 21, 22) gleicher Neigung zur Lanzenachse in Verbindung steht.
6. Blaslanze nach dem Anspruch 1, dadurch gekennzeichnet, dass das durch die zentral Bohrung (10) des Blocks (1), ragende Rohr (4) mittels eines Kragens (3) mit der Kalotte (2) verbunden ist.
7. Blaslanze nach dem Anspruch 6, dadurch gekennzeichnet, dass der Kragen (3) Bestandteil der Kalotte (2) ist.
EP83630174A 1982-10-22 1983-10-20 Vorrichtung zum Beliefern eines zu frischenden Metallbades mit gasförmigen und festen Stoffen Expired EP0109916B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83630174T ATE29266T1 (de) 1982-10-22 1983-10-20 Vorrichtung zum beliefern eines zu frischenden metallbades mit gasfoermigen und festen stoffen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84433 1982-10-22
LU84433A LU84433A1 (fr) 1982-10-22 1982-10-22 Dispositif pour fournir des matieres gazeuses et solides a un bain de metal en voie d'affinage

Publications (2)

Publication Number Publication Date
EP0109916A1 EP0109916A1 (de) 1984-05-30
EP0109916B1 true EP0109916B1 (de) 1987-09-02

Family

ID=19729968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83630174A Expired EP0109916B1 (de) 1982-10-22 1983-10-20 Vorrichtung zum Beliefern eines zu frischenden Metallbades mit gasförmigen und festen Stoffen

Country Status (7)

Country Link
US (1) US4533124A (de)
EP (1) EP0109916B1 (de)
JP (1) JPS59133336A (de)
AT (1) ATE29266T1 (de)
CA (1) CA1214635A (de)
DE (1) DE3373315D1 (de)
LU (1) LU84433A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001092586A1 (en) * 2000-05-30 2001-12-06 Technological Resources Pty Ltd Apparatus for injecting solid particulate material into a vessel

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LU85363A1 (fr) * 1984-05-15 1986-01-29 Arbed Dispositif d'adaptation pour tuyere d'acceleration de particules solides
LU86321A1 (fr) * 1986-02-25 1987-09-10 Arbed Lance de soufflage d'oxygene
JPH0543088Y2 (de) * 1987-04-24 1993-10-29
US5366537A (en) * 1993-01-05 1994-11-22 Steel Technology Corporation Fuel and oxygen addition for metal smelting or refining process
US5377960A (en) * 1993-03-01 1995-01-03 Berry Metal Company Oxygen/carbon blowing lance assembly
US5865876A (en) * 1995-06-07 1999-02-02 Ltv Steel Company, Inc. Multipurpose lance
US5681526A (en) * 1996-04-23 1997-10-28 Usx Corporation Method and apparatus for post-combustion of gases during the refining of molten metal
US5830259A (en) * 1996-06-25 1998-11-03 Ltv Steel Company, Inc. Preventing skull accumulation on a steelmaking lance
DE19637246A1 (de) * 1996-08-02 1998-02-05 Michael Henrich Schmelzofen insbesondere für Metalle mit zumindest einer in seinen Ofenraum einragenden Lanze, Lanze dafür sowie Verfahren zu deren Steuerung
US5885323A (en) * 1997-04-25 1999-03-23 Ltv Steel Company, Inc. Foamy slag process using multi-circuit lance
AT407398B (de) * 1998-08-28 2001-02-26 Voest Alpine Ind Anlagen Verfahren zum herstellen einer metallschmelze
AT407257B (de) * 1999-02-15 2001-02-26 Voest Alpine Ind Anlagen Verfahren zum herstellen einer metallschmelze
AT407259B (de) * 1999-02-22 2001-02-26 Voest Alpine Ind Anlagen Verfahren zum einbringen von hüttenwerksstäuben in einen konverter
US6217824B1 (en) 1999-05-20 2001-04-17 Berry Metal Company Combined forged and cast lance tip assembly
US7167796B2 (en) 2000-03-09 2007-01-23 Donnelly Corporation Vehicle navigation system for use with a telematics system
US7370983B2 (en) 2000-03-02 2008-05-13 Donnelly Corporation Interior mirror assembly with display
US7720580B2 (en) 2004-12-23 2010-05-18 Donnelly Corporation Object detection system for vehicle
US7402274B2 (en) * 2005-12-07 2008-07-22 Berry Metal Company Metal making lance slag detection system
US8017898B2 (en) 2007-08-17 2011-09-13 Magna Electronics Inc. Vehicular imaging system in an automatic headlamp control system
US20100020170A1 (en) 2008-07-24 2010-01-28 Higgins-Luthman Michael J Vehicle Imaging System
US20170356689A1 (en) * 2016-05-31 2017-12-14 Refractory Service Corp. Lance assembly

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001092586A1 (en) * 2000-05-30 2001-12-06 Technological Resources Pty Ltd Apparatus for injecting solid particulate material into a vessel

Also Published As

Publication number Publication date
ATE29266T1 (de) 1987-09-15
LU84433A1 (fr) 1984-05-10
CA1214635A (fr) 1986-12-02
DE3373315D1 (en) 1987-10-08
US4533124A (en) 1985-08-06
JPS59133336A (ja) 1984-07-31
EP0109916A1 (de) 1984-05-30

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