US3907264A - Means for cleaning blowing nozzles in steel production - Google Patents

Means for cleaning blowing nozzles in steel production Download PDF

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Publication number
US3907264A
US3907264A US42726073A US3907264A US 3907264 A US3907264 A US 3907264A US 42726073 A US42726073 A US 42726073A US 3907264 A US3907264 A US 3907264A
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United States
Prior art keywords
nozzle
hollow body
scraping
support structure
tip
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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 - Lifetime
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English (en)
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Rene Desaar
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Individual
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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
    • C21C5/462—Means for handling, e.g. adjusting, changing, coupling
    • 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
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • 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
    • C21C5/4693—Skull removal; Cleaning of the converter mouth
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • U.S. Cl .2 266/34 LM is provided a Cleaning device comprising a Scraping [5 Int. Cl. C21C 7/00 means to Contact and Scrape at least a part of the [58] held of Search 266/34 34 1 R outer surface of said nozzle when it is raised from a working position to a rest position for automatically [56] References C'ted removing material stuck to said nozzle.
  • the present invention relates to a device for cleaning a blowing nozzle used in the production of steel.
  • the problem of the invention is to provide a device which permits the automatic cleaning of blowing nozzles whenever they pass from the working position to the rest position so as to prevent the formation and increase in volume of a mass of slag on the ends thereof.
  • a device for cleaning an elongate blowing nozzle for use in the production of steel and when mounted so as to be raisable and lowerable by means of a winch mounted on a support said device comprising a scraping means arranged to contact and scrape at least part of the outer surface of the nozzle when the nozzle is raised from a working position to a rest position, so as to automatically remove material stuck to the nozzle.
  • the scraping means is connected to a support fixed relative to the axis of the nozzle and said fixed support is preferably integral with the support of the winch for raising and lowering the nozzle.
  • the scraping means is mounted on a guide member for guiding the end of the nozzle in its downward movement, the guide member being mounted on the fixed support.
  • This guide member is preferably a tapering hollow body oriented so as to have a large open base at its upper end and a small open base at its lower end, and along the axis of which the nozzle may move.
  • the small open base has an orifice which is slightly larger than the nozzle.
  • the scraping means is removably mounted on the outside of the hollow body.
  • This scraping means may comprise a scraping finger terminating in a tip arranged to contact the outer surface of the nozzle.
  • Said tip may comprise curved surfaces and be supported on the lower edge of said hollow body.
  • the tip of the finger comprises two surfaces separated by a projecting edge; these surfaces may be curved, concave and like a ploughshare or they may be planar.
  • FIGS. 1, 2 and 3 are schematic views in front and side elevation and in plan (respectively) and partly in section of a cleaning device according to the invention
  • FIG. 4 is a schematic perspective view of a scraping finger
  • FIG. 5 is a schematic view in part sectional elevation showing a scraping finger mounted pivotally
  • FIG. 6 is a somewhat schematic view of the entire apparatus of the present invention.
  • FIG. 7 is a perspective view of a modified form of guide member
  • FIG. 8 is a perspective view of a modified form of scraping means.
  • FIG. 9 is a fragmentary perspective view of still another form of scraping means.
  • a known container (not shown) used for producing steel is located a metal structure (not shown) to which is fixed a support 1 which carries a winch (not shown) which serves in known manner to operate a blowing nozzle 2 which can be lowered and raised.
  • a support which is fixed relative to the axis of the nozzle and comprises for example a plate 3 fixed by welding.
  • a square hole 3a and from this plate is suspended a guide member for the end of the nozzle which comprises a hollow body 4.
  • This hollow body 4 is a frustum with a square base fixed in inverted manner, i.e., with its small base 4a directed downwardly whilst the large base 4b is disposed upwardly and surrounds the square hole 3a in plate 3.
  • This hollow body 4 is also held in place by a gusset 5.
  • the small base 4a has a passage orifice 40 which isslightly larger than the cylindrical body of the blowing nozzle 2.
  • a scraping finger 7 which terminates in a curved tip 8.
  • This tip 8 is supported on the lower edge 6a of the walls of hollow body 4.
  • the fingers 7 are thus inclined relative to the longitudinal axis of the nozzle.
  • tip 8 is in contact with the cylindrical body of the nozzle 2 along a generator.
  • Tip 8 has two curved concave surface portions 8a, intersecting along a projecting edge 9. These two concave surface portions 8a are each like a ploughshare so that they form a wedge.
  • nozzle 2 When, with the aid of the winch, nozzle 2 is lowered from the rest position to the working position or blowing position its body first passes through a yoke fixed to support 1 of the winch and forming a retaining member for the nozzle which then passes through square hole 3a of plate 3. During this downward movement the end 2a of the nozzle is guided by the inner surfaces of the walls 6 of hollow body 4, then it passes through orifice 4c of the small base. The centers of the retaining yoke 10, of hole 3a and of orifice 4c are aligned on the same vertical line passing through the axis of hollow body 4.
  • the finger 7 can be mounted on a pivot 7a carried by two lugs 6b fixed to the walls 6 of hollow body 4. The finger is then maintained in place by a screw 12 that is threaded in body 4 and is provided with a compression spring 12a. As a result of this assembly it is possible to compensate for wear of tip 8.
  • FIG. 6 shows the overall arrangement of the present invention, in which the fixed support 1 is a portion of a frame 14 that carries a winch 15 for raising and lowering the nozzle 2.
  • the hollow body 4 is formed by two semiconical portions 4fand 4g. Portion 4g is attached to the end of a rack bar 17a driven by a pinion 17 so as to move the part 4g toward and away from 4f.
  • the walls 6 of body 4 are hollow and a cooling liquid such as water is fed through conduit 4d and leaves through conduit 4e.
  • Scraping fingers 7 are hollow as seen in FIG. 8, a cooling liquid being introduced through conduit 7a and leaving through conduit 7b.
  • Tip 8 is bounded by two flat surfaces 80 which terminate at 9a in a surface that is applied against the nozzle.
  • the nozzle is guided by a stirrup 10 comprised of two parts of which one part 10a is attached to a rack bar 16a driven by a pinion 16 whereby it approaches and recedes from the other part 10b.
  • the nozzle 2 as also shown in FIG. 6, comprises in known manner a conduit 2b for the introduction of oxygen, a conduit 2c for the introduction of a cooling liquid such as water, and a conduit 2d for the removal of that cooling liquid.
  • FIG. 9 shows the hollow body 4 in the embodiment of FIG. 7 provided at its small base with a ring 18 of scraping means comprised by a plurality of segments 18a fixed in known manner to the portions 4f and 4g by means of lugs 18b.
  • the hollow body can have a different shape and can therefore be for example a frustum having any polygonal base, square, hexagonal or the like or can be an inverted truncated cone.
  • the scraping fingers can be hollow and provided with a cooling liquid passage. In the same way the walls of the hollow body can be hollow and cooled by a cooling liquid.
  • the members for maintaining the nozzle body in place can comprise several portions which are pivotable relative to one another and operated by a mechanical, hydraulic or similar means.
  • a blowing nozzle mounted for vertical movement on and relative to said support structure.
  • a winch on said support structure for raising and lowering said nozzle, a fixed guide member carried by said support structure for guiding the end of the nozzle in its downward movement, and scraping means mounted on said guide member and supporting said blowing nozzle for scraping at least a part of the outer surface of the nozzle when said nozzle is raised from a working position inside said container to a rest position.
  • the guide member comprises a tapering hollow body oriented so as to have a large open base at its upper end and a small open base at its lower end, and along the axis of which the nozzle may move.
  • a device as claimed in claim 2 wherein said hollow body is an inverted frustrum such as a square based frustrum.
  • a device as claimed in claim 2 wherein said hollow body comprises several portions displaceable relative to one another by mechanical or hydraulic means.
  • said scraping means includes a scraping finger terminating in a tip arranged to contact the outer surface of the nozzle.
  • a device as claimed in claim 1 wherein said hollow body has along its lower edges crown-shaped portions having on the lower edge a surface which widens upwardly.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Cleaning In General (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
US42726073 1973-01-22 1973-12-21 Means for cleaning blowing nozzles in steel production Expired - Lifetime US3907264A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE43986 1973-01-22

Publications (1)

Publication Number Publication Date
US3907264A true US3907264A (en) 1975-09-23

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ID=99312140

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US42726073 Expired - Lifetime US3907264A (en) 1973-01-22 1973-12-21 Means for cleaning blowing nozzles in steel production

Country Status (8)

Country Link
US (1) US3907264A (fr)
AT (1) AT334936B (fr)
CA (1) CA989565A (fr)
ES (1) ES422503A1 (fr)
FR (1) FR2214752B1 (fr)
IT (1) IT1000944B (fr)
LU (1) LU68908A1 (fr)
NL (1) NL7400175A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4226407A (en) * 1979-03-26 1980-10-07 Bethlehem Steel Corporation Metallurgical lance deskuller
US4253644A (en) * 1978-12-04 1981-03-03 Inland Steel Company Fluid closure for and method of preventing flow through an opening in a fluid and particulate confining and conveying structure
US4349231A (en) * 1979-09-10 1982-09-14 Swiss Aluminium Ltd. Chisel alignment unit for a crust breaking facility
US4591134A (en) * 1984-05-08 1986-05-27 Voest-Alpine Aktiengesellschaft Arrangement for cleaning a lance head of a lance introducible into a metallurgical vessel

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2667326B1 (fr) * 1990-09-27 1992-11-13 Unimetall Sa Dispositif de decrassage d'une lance destinee a etre introduite dans un recipient metallurgique.
FR2679570B1 (fr) * 1991-07-25 1993-11-12 Sollac Dispositif de decrassage d'une lance de soufflage dans un recipient metallurgique, notamment un convertisseur d'acierie.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822163A (en) * 1955-05-11 1958-02-04 Pennsylvania Engineering Corp Charging apparatus
US3394928A (en) * 1965-12-20 1968-07-30 Robert A. Wiedl Combination oxygen lance clamp and descaling device
US3556501A (en) * 1968-03-29 1971-01-19 Demag Ag Blow lance assembly for metallurgical furnaces

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822163A (en) * 1955-05-11 1958-02-04 Pennsylvania Engineering Corp Charging apparatus
US3394928A (en) * 1965-12-20 1968-07-30 Robert A. Wiedl Combination oxygen lance clamp and descaling device
US3556501A (en) * 1968-03-29 1971-01-19 Demag Ag Blow lance assembly for metallurgical furnaces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253644A (en) * 1978-12-04 1981-03-03 Inland Steel Company Fluid closure for and method of preventing flow through an opening in a fluid and particulate confining and conveying structure
US4226407A (en) * 1979-03-26 1980-10-07 Bethlehem Steel Corporation Metallurgical lance deskuller
EP0017780A1 (fr) * 1979-03-26 1980-10-29 Bethlehem Steel Corporation Dispositif de décrassage de lances métallurgiques
US4349231A (en) * 1979-09-10 1982-09-14 Swiss Aluminium Ltd. Chisel alignment unit for a crust breaking facility
US4591134A (en) * 1984-05-08 1986-05-27 Voest-Alpine Aktiengesellschaft Arrangement for cleaning a lance head of a lance introducible into a metallurgical vessel

Also Published As

Publication number Publication date
CA989565A (fr) 1976-05-25
NL7400175A (fr) 1974-07-24
DE2364911B2 (de) 1977-06-16
DE2364911A1 (de) 1974-07-25
ATA37074A (de) 1976-06-15
IT1000944B (it) 1976-04-10
LU68908A1 (fr) 1974-02-11
ES422503A1 (es) 1976-04-16
FR2214752B1 (fr) 1978-03-10
AT334936B (de) 1977-02-10
IT7307280A1 (it) 1975-06-11
FR2214752A1 (fr) 1974-08-19

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