US2979270A - Oxygen lances for open-hearth furnaces and the like - Google Patents

Description

April 1961 1.. H. HUTTON 2,979,270

OXYGEN LANCES FOR OPENHEARTH FURNACES AND THE LIXEI Filed Feb. 27, 1959 3 Sheets-Sheet 1 INVENTOR.

LELAND H. HUTTON --llllllll HIM ATTORNEYS April 11, 1961 H. HUTTON OXYGEN LANCES FOR OPEN-HEARTH FURNACES AND THE LIXE 3' Sheets-Sheet 2 Filed Feb. 27, 1959 INVENTOR.

LELAND H. HUTTON ZQA,

ATTORNEYS April 11, 1961 H. HUTTON OXYGEN LANCES FOR OPEN-HEARTH FURNACES AND THE LIKE 3 Sheets-Sheet 3 Filed Feb. 27, 1959 INVENTOR.

LELAND H. HUTTON MgM L ATTORNEYS United? 3w 19 OXYGEN LANCES FOR OPEN-HEARTH FURNACES AND THE LIKE Leland H. Hutton, 2518 'Claver Road, University Heights, Ohio Filed Feb. 27, 1959, Ser. No. 796,157

2 Claims. (Cl. 239-132) This invention relates generally to oxygen lanc'es, but has reference more particularly to devices of this character which are especially adapted for supplying' o'xygen to open-hearth furnaces.

A primary object of the invention is to provide devices of this character which are of simple and sturdy construction and particularly useful for feeding oxygen, in controlled amounts, to the molten metal in open-hearth furnaces.

Another object of the invention is to provide devices of this character which are characterized by the incor' poration therein of means for etficiently Water cooling the parts through which the oxygen passes.

A further object of the invention is to provide devices of the character described, which have incorporated as a part thereof means for transporting and supporting them by means of movable cranes and the like.

A still further object of the inventionis to provide de? vices of the characterdescribed, portions of which are easily removable forrepair or replacement purposes. Other objects and advantages of my invention will-be apparent during the course of the following description. In the accompanying drawings forming a part of this specification, and in which like numerals are employed to designate like parts throughout thesame, I

Fig.1 is a topplan View of one fofiii of the device; Fig. 2 is an elev'ational view, of the device; of Fig. l, with portions thereof bfolcen away to show certain features of construction;

, Fig. 3 is a cross-sectional view, showing a partisan the lower end of the device of Fig; 2, on an enlarged scale, and taken on the line 3 30f Fig. l;

Fig. 4 is a cross-sectional View, taken on the lin Pie- I Y v Fig. 5 is a viewsirnilar to Fig. 3, but showing a modifica'tien of the invention; Y V Y N Fig. 6 is a cioss-sec'ti'onal" view, takedon the line of Fi-gdg M Fig.7 is a view similar to Fig. '5", but showing another modification oftheinventiofij" Y i 'Fig.8 isa. cross-sectional View, takeii' on the" line8=8 0f ri 7; v

Fig. 9 is' a-viw' siniil'ar'to Fig. 3, but shaping afur th rmodifiestion bf the invention; 'Fig' 10 isa eross sectional view, taken an the line 'ltliti'ofFigfli Fig. 11 is a view similar another modification ofthe invention, and Fig. 1'2" is a" cross-sectional new; ts 1212ofFig.l1.ff a a Referring more particularly to Figs. .1 to 4qinelusive 'oflthe drawings, reference numeral desigriates ai gail oi1suppo'rtQfo'r anoxygen lance, which .bail is adaptedgto 1 be en a ezrer supported by thehook of a travelingcrane tang. are: slewin still the line I or the like (not shown) in order to transport the oxygen i lance from one open hearth furnace to another.

The bail or support 1 is pivota'lly-secured or=connected to, an annular collar 2, as by meansot pivot pinso'r In the 'various modifications to be'now .described, th

ice

2 bolts 3, which are thr'eadedly secured to the collar, at diametrically-opposite points of the latter.

Welded to the lower face of the collar 2, in concentric spaced relation to each other, are tubular steel members 4 and 5, the member 4 extending downwardly to a level below the lower end of the member 5. Secured within the lower end of the member 4, as by a press fit, is a tip or nozzle 6, made of copper, and the detailed construe tion of which will be presently described.

The tip or nozzle 6 is provided with a recess 7 centrally of its upper portion, and into which the lower end of a steel conduit or pipe 8 extends, this pipe being secured to the tip or nozzle 6, as by a press fit. The conduit 8 is in concentric spaced relation to the tubular member 5 and extends through a central opening 9 in the collar 2, the upper end of the conduit 8 being provided with threads 10, so as to adapt same for the removable connection thereto of a hose for supplying oxygen to the conduit 8.

In order to provide a fluid-tight seal between the conduit 8 and the collar 2, the collar 2 has welded thereto, as by weld metal 11, a nut 12, in which a bushing 13 is threadedly secured, which bushing is adapted to compress packing 14, disposed in a counterbore 15 of the opening 9, so as to force this packing tightly between thewall of the counterbore 15 and the exterior wall of the conduit 8, thus providing a fluid tight seal between the collar and conduit.

A water inlet pipe 16 is also provided, which extends through the conduits 4 and 5 and communicates with the annular space 17 between the member 5 and conduit 8, ancha similar water outlet pipe 18 is provided, which we tends through the member 4 and communicates with the annular space 19 between the members 4 and 5;

The nozzle or tip 6 is provided with a series of circilnv ferentially-spaced passageways 20, which extend through the nozzle, in a downwardly and outwardly inclined direc= tion; communicating the lower end of the conduit 8*with thespace below the nozzle or tip. The nozzle or tip 6 is also provided with a series of circumferentially-spacdd passageways 21, which are in alternate arrangement with the passageways 20, and extend .downwar'dly' and inwardly toward the center of the tip, these passageways communicating with each other. The passageways 21-, are preferably at least about twice the diameter of the pas sageways 20. I 1 i In theuse of the oxygen lance, as described, the lance iscarriedby means of the hookof a traveling crane to a position above an opening provided in the roof of an'open hearth furnace, and the lance is passed downwardly through this opening to a position. in which the nozzle or tip 6 is disposed closely adjacent the molten-metal in I thefurnaee. Y a 1 Due to. the pivotal connection of the bail or; support- 1 with the collar 2, the bail may. be swung out 'ofli-ne with the axis of thecpnduit 8, so as to facilitateconnection to.this conduit of the hose which supplies oxygen to this conduit. 7 1 f;

I As oxygen is-suppliedyto the conduit 8 and irltozJthe U furnace through the passageways 20,wate'r.-fof cooling a f the tip or .nozzle'6isa,continuously,supplied tdthe pas= sageways 21, {the water .circulatingwthroug'h the'espace 17 land upwardly; through the spacez19. 'ln this'way, the entire lance, and especiallytheitip 6 -is.maintained at a suflicient low temperature to avoid melting or; Idam age thereto, in spite of Y the :highit'emperature: of the molten metal in the furnace. l 1 I In t he event -that the tip 6;.cvneeds replac'ernen not necessarygto replacetlie' entire;}lance;-..sincer the n and the conduit 8 may be easily 'r emovedufrom the col larv 2.. and,mernbers '4 "and 5;"without disturbing the col. ,lar2and rfnembersA and-5; A

upper portions of the lances are the same, in construction, as that shown in Figs. 1 and 2, and need not therefore be shown. The lower portions of the lances are of somewhat difierent construction, and parts thereof which correspond with those in Figs. 1 to 4 inclusive will be identified by corresponding numerals, but with the addition of letters to the numerals.

In Figs. 5 and 6,, a modification of the invention is shown, in which a tip or nozzle 6a, made of copper, is secured to the lower ends of members 4a and 5a, as by weld metal 22. The top or nozzle 6a is provided with a recess 7a centrally of its upper portion, and into which the lower end of the steel conduit or pipe 8a extends, the pipe being secured to the tip or nozzle 8a, as by weld metal 23. v

The nozzle or tip 6a is provided with a series of circumferentially-spaced passageways 20a, which extend through the nozzle, in a downwardly and outwardly inclined direction, communicating the lower end of the space 17a with the Space below the nozzle or tip. The nozzle or tip 6a is also provided with a series of circumferentially-spaced passages 21a, which are in alternate arrangement with the passageways 20a, and extend downwardly and inwardly toward the center of the tip, these passageways communicating the lower end of the space 19a with the recess 7a.

In the use of this modified form of lance, the oxygen is supplied through the conduit 16 to the passageways 200, via the space 17a. The cooling water is supplied through the upper end of the conduit 8a, passes through this conduit into the recess 7a, through the passageways 21a, space 19a and out through the pipe 18.

In Figs. 7 and '8, another modification of the invention is shown, in which the tubular member- 4b is preferably made of stainless steel, and has secured to its lower end, as by weld metal 22b, a cap or tip 6b, also preferably made of stainless steel, and provided with a series of circumferentially-spaced openings 24, which are inclined to the axis of the member 4b.

The steel conduit 8b has secured to its lower end, as by weld metal 23b, a cap 25, provided with a series of circumferentially-spac'ed openings or passageways 26, which are in axial alignment with the openings 24. Stainless steel tubes 27 are welded to the caps 25 and 6b and serve to communicate the openings 26 with the openings 24. In the use of this modified form of lance, the oxygen is supplied through the conduit 8b, and to the openings 24, via the openings 26 and tubes 27; The cooling water is supplied through the pipe 16, passes downwardly through the space 171) upwardly through the space 19b and out through the pipe 18. In this form of the invention, the water is circulated about the pipes 27 and an eflicient cooling effect is obtained.

In Figs. 9 and 10, a further modification is shown, in which the construction is substantially the same as that shown in Figs. 3 and 4, with the exception that the terial, this tube being adapted to carry oxygen from the conduit 8d to a point adjacent the molten metal in the furnace.

In this form of the invention, the cooling water is supplied through inlet 16, passes downwardly through the space 17d upwardly through the space 19d and out nozzle or tip is secured to the tubular member 4c,

as by weld metal 28, and to the conduit 8c, as byweld metal 29.

rIn Figs. 11 and '12, a still further modification is shown, in'which tubular steelmembers 4d and 5d are employed, as well as the conduit 8d. The tubular member 5d terminates at a level above that of the lowerend of the member 4d, and the conduit 8d terminates at-a level substantially abovethat of the lower end of the member 5d. i e i The conduit 8d has secured within its lower end, as by weld metal 30, an interiorly-threaded bushing 31, which, in turn, has secured thereto, as byweld metal32;*a tubular element 33, which, in eifect, is an extension of the through the pipe 18.

It is thus seen that I have provided devices of the character described which are of simple and sturdy construction, and well adapted for the purposes for which they have been designed, being cooled in a thorough and highly efficient manner.

It is to be understood that the form of my invention, herewith shown and described, is to be taken as a preferred example of the same, and that various changes may be made in the shape, size and arrangement of parts thereof, without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. In a device of the character described, a supporting collar, three concentrically arranged spaced tubular members secured to said collar and depending therefrom, a nozzle or tip supported by at least one of said tubular members, said nozzle or tip made as a one-piece member of copper having a series of passageways consisting of circumferentially-spaced inclined bores diverging downwardly and outwardly through said nozzle or tip for the passage of oxygen therethrough, and a series of circumfercntially-spaced passageways therein for the passage of a cooling fluid, said last-named passageways consisting of bores arranged circumferentially alternately with said first-named passageways, and extending inwardly and downwardly toward the center of said tip and converging in a common junction near the center of said tip, said junction being separated from the outer ends of said firstnamed passageways by a mass of said one piece member.

2. In a device of the character described, a supporting collar, three concentrically arranged spaced tubular mem bers secured to said collar and depending therefrom, means for passing oXygen through the innermost of said tubular members, means for circulating a cooling fluid through the other tubular members, a nozzle or tip supported by at least one of said tubular members, said nozzle or tip made as a one-piece member of copper having a series of passageways consisting of circumferentiallyspaced inclined bores leading from said innermost tubular member and diverging downwardly and outwardly through said nozzle or tip for the passage of oxygen therethrough, and a series of circumferentially-spaced passageways therein for the passage of said cooling fluid, said last-named passageways consisting of bores arranged circumferentially alternately with said first-named passageways, and extending inwardly and downwardly toward the center of said nozzle or tip and converging in a common junction near the center of said tip, said junction being separated from the outer ends of said first-named passageways by a mass ofsaid one piece member.

References Cited in the file'of this patent UNITED STATES PATENTS Gehring Sept. 24, 1957

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