US3662447A - Method for producing a nozzle-load for a water cooled blowing lance - Google Patents

Method for producing a nozzle-load for a water cooled blowing lance Download PDF

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Publication number
US3662447A
US3662447A US61090A US3662447DA US3662447A US 3662447 A US3662447 A US 3662447A US 61090 A US61090 A US 61090A US 3662447D A US3662447D A US 3662447DA US 3662447 A US3662447 A US 3662447A
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US
United States
Prior art keywords
nozzle
front plate
blanks
head
blank
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 - Lifetime
Application number
US61090A
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English (en)
Inventor
Otto Schweng
Hellmuth Smejkal
Hans Vereb
Karl Eicher
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Voestalpine AG
Voest AG
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Voestalpine AG
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    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/026—Method or apparatus with machining
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49348—Burner, torch or metallurgical lance making

Definitions

  • the disclosure relates to a nozzle-head for a water-cooled PP N03 61,090 blowing lance comprising at least one outlet opening for a gaseous refining agent and, if desired, fine-grained fluxes, an 30 Foreign Application p Data inlet piece, at least one nozzle tube leading through a watercooled space and a front plate to which the at least one nozzle Aug.
  • the number of connecting seams cor- 56 responds to the number of nozzle tubes; the seams are far 1 References Cited away from the front plate and thus sheltered from any danger UNITED STATES PATENTS to damage- 2,378,516 6/1945 Timmerman et al ..29/l57 C 7 Claims, 8 Drawing Figures 9 10 I I l a,
  • the invention relates to a nozzle-head for a water-cooled blowing lance comprising one or several outlet openings for a gaseous refining agent and, if desired, fine-grained admixtures, an inlet piece, one or several nozzle tubes leading through a water-cooled space and connected with a front plate, and to a method for producing such nozzle-head.
  • blowing lances In basic oxygen steelmaking methods the oxygen necessary for refining the pig iron is blown onto the metal bath by means of water-cooled blowing lances. These blowing lances are provided at their lower end with nozzle-heads usually made of oxygen-free electrolyte copper which guarantees a long life of the nozzle-head because of the good heat conductivity and the poor affinity of copper to oxygen.
  • the blowing lances comprised an oxygen supply tube and a nozzle-head, the outlet opening in the nozzle-head being preferably designed to be converging-diverging (Laval-nozzle).
  • the nozzle-heads were produced from preforged blanks by chip removal.
  • nozzle-heads with several outlets so-called multi-hole nozzles
  • the holes are arranged in a manner that their axes are inclined to the blowing lance axis under a specific angle and the refining agent leaves these holes in several streams so that the reaction area of the oxygen with the melt is enlarged.
  • multi-hole nozzles are used which have e.g. three, four, five or six outlet openings.
  • the noule-heads for such blowing lances were manufactured exactly as those for the one-hole nozzles.
  • the individual parts are primarily produced by forging so that a finegranular structure is present in the material; cast parts have a coarse and porous structure and are unsuitable for this application.
  • an inlet piece and a front plate are separately manufactured by drop forging whereupon these parts are worked by means of chip removal and connected with each other via three interposed prefabricated nozzletubes by soldering or welding.
  • This way of manufacturing necessitates exact working and fitting of the individual parts, soldering or welding is very time consuming, and great manual dexterity is needed because it is difficult to connect the nozzle tubes, which are arranged very closely side by side, with the front plate and the inlet piece.
  • a particular disadvantage resides in that two partition planes are present in that part of the nozzle-head which gets into contact with oxygen; of these planes one lies very closely to the surface of the front plate. In case of flame erosion of the nozzle-head in the vicinity of the outlet openings it may happen that the soldering seam of this partition plane gets undone which would result in a failure of the nozzle-head.
  • the invention is aimed at creating a new nozzle-head for oxygen blowing lances with one or sever 1 outlet openings with which these disadvantages and provided are avoided. Furthermore the invention is aimed at a method for producing such nozzle-head in a simple, safe and cheap way guaranteeing an improved, prolonged life.
  • a water deflecting body is resting on ribs of the front plate, said body being provided with recesses whose number and shape corresponds to the number and shape of the nozzle tubes, the walls of said recesses surrounding the nozzle tubes for at least two-thirds of their circumference thus forming continuous annular cooling-water canals.
  • the method according to the invention for the production of a nozzle-head is characterized by the steps of: producing blanks for the inlet piece and the front plate each with studs in a number corresponding to the number of the nozzle tubes; providing for planar surfaces at the end of the studs of either blank perpendicularly to the nozzle-head axis e.g.
  • the combined two blanks are put onto an auxiliary means comprising a plate and guiding pins vertically arranged thereto, said guiding pins engaging into the holes of the blanks thus affording centering and fixing of these parts.
  • the two blanks for the inlet piece and the front plate and, if desired, the water deflection body are produced by drop forging from pressed material which was preforged in one or several heats, particularly copper, so that a high degree of shaping is achieved, which amounts to about 5 to 25 fold, preferably 10 to 15 fold, shaping for the blank for the front plate.
  • the annular water deflection body may be composed of two parts.
  • FIG. 1 a is a vertical sectional view of a nozzle-head connected with a blowing lance according to the known construction and manufacturing technique, which was also employed by applicants so far.
  • FIG. 1 b is a horizontal sectional view along line I--] of FIG. 1 a.
  • FIG. 2 a is a vertical sectional view of the nozzle-head according to the invention and FIG. 2 b is a horizontal sectional view along line IIII of FIG. 2 a.
  • FIGS. 3 a, 3 b and 3 0 illustrate the method according to the invention and show vertical sectional views of the blanks for the inlet piece and the front plate, respectively, and of the water deflecting body.
  • FIG. 4 is a vertical sectional view through the blanks for the inlet piece and the front plate which are combined with the help of an auxiliary device according to a specific embodiment of the method according to the invention.
  • the nozzle tip which belongs to the art and is shown in FIG. 1 a comprises a nozzle-head 1 which gets into contact with the refining agent, and comprises a water deflecting ring 2 forming a separate constructional part which guides the cooling water to the nozzle-head l.
  • the nozzle-head 1 comprises an inlet piece 3, three individual nozzle tubes 4 and the front plate 5 which parts are rigidly connected with each other by soldering or welding.
  • the axes of the nozzle tubes 4 are inclined towards the vertical line.
  • recesses 6 are provided in the water deflecting ring 2; annular canals are formed between the walls of these recesses and the nozzle tubes 4 through which canals cooling water flows with high speed in the direction shown by the arrows in FIG.
  • the nozzle-head 1 is welded or soldered via its inlet piece 3 to the oxygen tube 9 of the blowing lance and via its front plate 5 with the jacket tube 11.
  • a water guiding tube is built in which is rigidly connected with the water deflecting ring 2 which is supported on ribs of the front plate 5 so that the front plate is intensively cooled, too.
  • Particularly endangered zones of the front plate 5 are the middle part (star) denoted with numeral 12 and the edges 13 in the area of the outlet openings 14 for the oxygen.
  • FIG. 2 a shows for ready comparison the nozzle-head according to the invention.
  • the nozzle-head 1' comprises only two parts, i.e. the inlet piece 3' with tubular projections 17 and a front plate 5 with tubular projections 16; thus, only three junctures 18 are present which are at a great distance from the surface of the front plate 5' and are lying in one plane, which is perpendicular to the axis 33 of the nozzlehead. This connection cannot come undone owing to the influence of heat because the connecting areas are in about the middle of the nozzle-head 1'.
  • the ring 2' around which the water circulates is provided with recesses 6 surrounding the tubes 16 through about two-thirds of their circumference, thus forming continuous annular canals; in FIG. 2a the current of the water is illustrated by arrows.
  • the speed with which the water circulates through the nozzle-head is continuously increased in the area of the ring 2 to reach a maximum when the water enters the space defined by the tubes l0, 11.
  • the baffle ring 2' rests on narrow ribs 15' (FIG. 21:).
  • the ring 2' consists of one piece.
  • a groove or notch 20 is provided for engaging adjusting screws 19 for centering the water guiding tube 10 relative to the oxygen tube 9.
  • FIG. 3 a shows a blank 21 for the inlet piece 3' which blank is drop forged from a preformed block in one or two heats.
  • the blank 21 is provided with three conical studs 22 whose outer shape corresponds to the tubularprojections 17.
  • FIG. 30 shows a blank 21 for the inlet piece 3' which blank is drop forged from a preformed block in one or two heats.
  • the blank 21 is provided with three conical studs 22 whose outer shape corresponds to the tubularprojections 17.
  • FIGS. 1-10 shows a blank 25 for the front plate 5, which blank 25 is formed in the die from a block which is preformed in one or two heats; in this process a 5 to 25 fold total shaping is to take place; a preferably 10 to 15 fold shaping is necessary in order to obtain a fine-granular and dense structure.
  • the blanks 21, 25 are preferably made of oxygen-free electrolyte copper. In principle, it is, however, possible to use also other metals, e.g. pure nickel or stainless steel for producing them.
  • the blanks 21 25 have an outer shape which makes it possible to form the necessary bevel edges 24, 24 and the groove 20 for connecting the nozzle-head with the blowing lance and for engagement of the adjustment screws 19, respectively, at a later point.
  • FIG. 3 a and 3 c the inner contours of the tubular projections l6, 17 is shown in dotted lines.
  • planar surfaces 28, 28' are produced which are perpendicular to the axis 33 of the nozzlehead, and central holes 23, 23' are driven in, so that bores '29 (FIG. 4) may be produced going through the studs 22, 26.
  • FIG. 3 b the water deflecting ring 2', which is preferably made of steel in one piece, is shown. This ring 2' lies on the supporting surfaces 27 (FIG. 3 c) of the ribs 15' of the front plate 5' when the nozzle-head is joined to the blowing lance.
  • FIG. 4 shows an auxiliary device for joining the blanks 21, 25 which device comprises a plate 30 and vertically arranged guiding pins 32.
  • holes 29 had been bored into the blanks through the studs 22, 26 within the predetermined, inner contour of the tubular projections l7, 16, which is shown in dotted lines.
  • the guiding pins 32 engage in these holes 29 and represent a centering means for the blanks 25, 21.
  • a solder in the form of an annular solder foil is inserted, whereupon heating to soldering temperature of about 700 to 900 C in a temperature controlled furnace takes place. Then the blanks are cooled slowly to obtain a firm soldering connection between the blanks 21, 25. If, as shown in FIG.
  • a water circulating ring 2' is used made of one piece, it is inserted after the blank 21 is put onto the auxiliary device comprising the plate 30 and the guiding pins 32 whereupon the blank 25 is joined with the blank 21.
  • the auxiliary means is removed and mechanical working is started, i.e. the milling or boring, respectively, of the insides of the tubular projections l6, 17, the bevel edges 24, 24, the groove 20 and the support planes 27 (FIG. 3 a or 3 c, respectively).
  • the finished nozzlehead 1' together with the water circulating ring may then be welded with the tubes 9, 10, ll of the blowing lance; adjusting screws 19 help to carry out centering of the tube 10.
  • a method for producing a nozzle-head for a blowing lance comprising at least one outlet opening for a gaseous refining agent, an inlet piece, at least one nozzle tube leading through a water-cooled space, and a front plate to which said at least one nozzle tube is connected, the steps of a. producing blanks for the inlet piece and the front plate each with studs in a number corresponding to the number of nozzle tubes;

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Nozzles (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US61090A 1969-08-14 1970-08-05 Method for producing a nozzle-load for a water cooled blowing lance Expired - Lifetime US3662447A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT783069A AT318673B (de) 1969-08-14 1969-08-14 Mit einer wassergekühlten Blaslanze verbindbarer Düsenkopf und Verfahren zu seiner Herstellung

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US3662447A true US3662447A (en) 1972-05-16

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US61090A Expired - Lifetime US3662447A (en) 1969-08-14 1970-08-05 Method for producing a nozzle-load for a water cooled blowing lance

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Country Link
US (1) US3662447A (de)
JP (1) JPS5036405B1 (de)
AT (1) AT318673B (de)
BE (1) BE754652A (de)
CA (1) CA948404A (de)
DE (3) DE2058159C3 (de)
ES (2) ES382405A1 (de)
FI (1) FI50341C (de)
FR (1) FR2056865A5 (de)
GB (1) GB1318721A (de)
LU (1) LU61505A1 (de)
SE (1) SE382468B (de)
ZA (1) ZA705327B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797814A (en) * 1972-03-27 1974-03-19 Berry Metal Co Oxygen lance with multi-orificed nozzle
US3827632A (en) * 1973-09-13 1974-08-06 Berry Metal Co Fuel and oxygen lance assembly
US3835524A (en) * 1973-08-13 1974-09-17 Massey Welding Co Method of manufacturing rejuvenated scarfing blocks
US4052005A (en) * 1976-03-11 1977-10-04 Berry Metal Company Oxygen lance nozzle
US4333527A (en) * 1979-10-22 1982-06-08 Otis Engineering Corporation Side pocket mandrel and method of construction
USRE32441E (en) * 1979-09-20 1987-06-23 Otis Engineering Corporation Side pocket mandrel and method of construction
US5370309A (en) * 1993-05-19 1994-12-06 A. H. Tallman Bronze Company Limited Liquid cooled nozzle
US6217824B1 (en) 1999-05-20 2001-04-17 Berry Metal Company Combined forged and cast lance tip assembly
US6565800B2 (en) * 2000-05-30 2003-05-20 Technological Resources Pty Ltd Apparatus for injecting solid particulate material into a vessel
US20120100496A1 (en) * 2007-08-06 2012-04-26 Anne Boer Burner
US9032623B2 (en) 2007-08-06 2015-05-19 Shell Oil Company Method of manufacturing a burner front face

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712745C2 (de) * 1977-03-23 1979-03-15 Stahlwerke Peine-Salzgitter Ag, 3150 Peine Lanzenkopf für Frischlanze
JPS5446401A (en) * 1977-09-20 1979-04-12 Tamura Shokai Kk Electric device containing box
LU84433A1 (fr) * 1982-10-22 1984-05-10 Mecan Arbed Dommeldange S A R Dispositif pour fournir des matieres gazeuses et solides a un bain de metal en voie d'affinage
RU2051974C1 (ru) * 1995-01-25 1996-01-10 Александр Леонидович Кузьмин Наконечник кислородно-конвертерной фурмы
GB2327259B (en) * 1997-07-15 2001-06-20 British Steel Plc Steel making lances
DE102006010287A1 (de) * 2006-03-02 2007-09-13 Saar-Metallwerke Gmbh Sauerstofflanzenkopf
EP3205420A4 (de) * 2014-10-10 2018-03-28 Seoul Engineering Co., Ltd. Lanzendüse, verfahren zur herstellung einer lanzendüse und vorrichtung zur herstellung einer lanzendüse

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2378516A (en) * 1941-07-02 1945-06-19 Linde Air Prod Co Manufacture of heating heads and blowpipe nozzles
US2397084A (en) * 1943-12-11 1946-03-26 Westinghouse Electric Corp Method of manufacturing pitotstatic tubes
US3228612A (en) * 1963-11-20 1966-01-11 Bethlehem Steel Corp Liquid-cooled burner for open hearth furnaces
US3477112A (en) * 1968-03-08 1969-11-11 Goss Gas Inc Method for forming torch tips

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2378516A (en) * 1941-07-02 1945-06-19 Linde Air Prod Co Manufacture of heating heads and blowpipe nozzles
US2397084A (en) * 1943-12-11 1946-03-26 Westinghouse Electric Corp Method of manufacturing pitotstatic tubes
US3228612A (en) * 1963-11-20 1966-01-11 Bethlehem Steel Corp Liquid-cooled burner for open hearth furnaces
US3477112A (en) * 1968-03-08 1969-11-11 Goss Gas Inc Method for forming torch tips

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797814A (en) * 1972-03-27 1974-03-19 Berry Metal Co Oxygen lance with multi-orificed nozzle
US3835524A (en) * 1973-08-13 1974-09-17 Massey Welding Co Method of manufacturing rejuvenated scarfing blocks
US3827632A (en) * 1973-09-13 1974-08-06 Berry Metal Co Fuel and oxygen lance assembly
US4052005A (en) * 1976-03-11 1977-10-04 Berry Metal Company Oxygen lance nozzle
USRE32441E (en) * 1979-09-20 1987-06-23 Otis Engineering Corporation Side pocket mandrel and method of construction
US4333527A (en) * 1979-10-22 1982-06-08 Otis Engineering Corporation Side pocket mandrel and method of construction
US5370309A (en) * 1993-05-19 1994-12-06 A. H. Tallman Bronze Company Limited Liquid cooled nozzle
US6217824B1 (en) 1999-05-20 2001-04-17 Berry Metal Company Combined forged and cast lance tip assembly
US6565800B2 (en) * 2000-05-30 2003-05-20 Technological Resources Pty Ltd Apparatus for injecting solid particulate material into a vessel
US20120100496A1 (en) * 2007-08-06 2012-04-26 Anne Boer Burner
US9032623B2 (en) 2007-08-06 2015-05-19 Shell Oil Company Method of manufacturing a burner front face

Also Published As

Publication number Publication date
DE2034575C3 (de) 1979-01-25
ES382405A1 (es) 1973-04-16
DE2058159A1 (de) 1972-02-03
ZA705327B (en) 1971-04-28
ES187281Y (es) 1974-08-16
DE2058159C3 (de) 1979-03-22
FR2056865A5 (de) 1971-05-14
FI50341B (de) 1975-10-31
JPS5036405B1 (de) 1975-11-25
GB1318721A (en) 1973-05-31
ES187281U (es) 1974-01-01
LU61505A1 (de) 1970-10-22
SE382468B (sv) 1976-02-02
CA948404A (en) 1974-06-04
DE2034575B2 (de) 1978-05-24
DE7026215U (de) 1971-07-01
DE2058159B2 (de) 1978-07-13
FI50341C (fi) 1976-02-10
BE754652A (fr) 1971-01-18
AT318673B (de) 1974-11-11
DE2034575A1 (de) 1971-05-13

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