US3817505A - Device for injecting fluids in tuyeres with separate multiple feeds - Google Patents

Device for injecting fluids in tuyeres with separate multiple feeds Download PDF

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Publication number
US3817505A
US3817505A US00266256A US26625672A US3817505A US 3817505 A US3817505 A US 3817505A US 00266256 A US00266256 A US 00266256A US 26625672 A US26625672 A US 26625672A US 3817505 A US3817505 A US 3817505A
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United States
Prior art keywords
pipe
outer pipe
tuyere
fluids
tuyeres
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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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US00266256A
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English (en)
Inventor
Roy P Le
E Sprunck
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Creusot Loire SA
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Creusot Loire SA
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Filing date
Publication date
Priority claimed from FR7127760A external-priority patent/FR2146970A1/fr
Priority claimed from FR7137308A external-priority patent/FR2156422A2/fr
Application filed by Creusot Loire SA filed Critical Creusot Loire SA
Application granted granted Critical
Publication of US3817505A publication Critical patent/US3817505A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21C5/48—Bottoms or tuyéres of converters

Definitions

  • FIG 2 The present invention relates to a device for blowing and injecting fluids, i.e. gases or liquids, in tuyeres with separate, multiple feeds, which may for example be used in the refining of metals.
  • fluids i.e. gases or liquids
  • blowing agent For along time steel converters have employed as the blowing agent a single gaseous phase; ordinary air, oxygen-enriched air, or rich mixtures, such as oxygen and water vapour, etc. This blown in gaseous phase was called the blow blast. It was introduced into a large number of tuyeres by means of a wind box fed at relatively low pressure, of the order of 2.5 Bars. Each blow blast jet had only one feed.
  • a first fluid which is generally an oxidising gas, e.g. pure oxygen or else a mixture of several gases, and at the periphery a cooling and protective fluid.
  • oxidising gas e.g. pure oxygen or else a mixture of several gases
  • plastics seals intended for a maximum working temperature, according to the nature of the seal, of between 200 and 250C.
  • the aim of the present invention is to obtain a device for the introduction of at least two distinct fluids into divided double supply or even divided multiple supply, tuyeres, which will function correctly not only at high pressures, but also at temperatures very considerably higherv than 250C, while providing for the possibility of controlling the remaining length of the tuyere while in use, between two operations.
  • a device for the separate introduction of at least two distinct, pressurized fluids, into a multiple feed tuyere comprising at least two concentric pipes, each pipe being longer, on the feed side than the pipe which surrounds it and having on its outer surface, at a level to which the pipe which surrounds it does not extend, at least one annular seal effecting a seal by compression, resulting from screwing, keying, or any other means of compression, between two clamping pieces arranged around the pipe in question, one of which may form a fluid supply chamber for the pipe which surrounds the pipe in question, the outermost pipe being surrounded by a hollow cylindrical part, called a sleeve, fixed to the bottom plate, and the outermost pipe has two annular seals on its outer surface, the first of these seals being clamped against the sleeve and against the outermost pipe by means of a nut screwed onto the said sleeve and being for the purpose of resisting fluid leaks from the nose of the tu
  • the or each of the pipes other than the outermost pipe has only a single seal on its outer surface
  • the outer pipe of each tuyere may be set in position through the bottom plate of the converter even before construction of the refractory bottom, its two open ends may then be temporarily closed during the entire construction of the bottom, the other pipe or pipes forming the tuyere then being engaged in and secured to the already located outermost pipe when the construction and firing of the refractory bottom are complete and the end caps have been removed.
  • the outermost pipe of the tuyere passes through the sleeve, which is closed at its lower end by a closure cap which is screwed onto it, compressing one of the annular seals, while positioning and retaining the said outermost pipe.
  • an elbow piece which will supply the inner pipe of the tuyere with fluid, is provided at the elbow and in the axis of the tuyere with detachable access means, enabling control of the remaining length of the inner pipe of the tuyere while in use.
  • these detachable access means may include a transparent eyehole, like a blast furnace tuyere.
  • each pipe of the tuyere surrounded by another is provided externally with studs in a staggered arrange ment to ensure that the pipe is centred or is off-centre relative to the pipe which surrounds it, depending on whether the projection heights of the studs are the same or vary around the circumference of the pipe.
  • the outermost pipe of the tuyere has several external discs forming baffles to prevent the pipe from being torn out of the refractory mass of the bottom, and also to resist return passage of the protective, peripheral fluid along the outer surface of the said outer pipe.
  • the said peripheral fluid in order to precisely control the flow of peripheral, protective fluid of each tuyere, the said peripheral fluid is admitted into each tuyere by means of an individual pump per tuyere, so that a variation imposed on the peripheral fluid flow of one tuyere does not cause any variation in the peripheral fluid flow of the adjacent tuyeres.
  • a good example of the application of such a device is that a double tuyere, fed with pure oxygen in the central conduit and with fuel oil in the peripheral conduit or conduits.
  • This feature is of particular interest when it is desirable to vary the peripheral, protective fluid flow at will and according to circumstances, for example as a function of the wear rate of the tuyere, or again, in the opposite direction, as a function of commencement of choking and plugging of the nose of the tuyere.
  • Such a double tuyere in the present example, is placed in a converter bottom made of tarred, tamped or vibrated dolomite, the usual refractory material.
  • FIG. 1 is a vertical section of such a device of the invention, in use.
  • FIG. 2 is a vertical section of the lower end of the outer pipe fitted with its temporary closure cap.
  • FIGS. 3, 4 and 5 show in section various constructions for spacing the inner and outer pipes.
  • the bottom plate 1, supporting the tarred dolomite bottom 2 receives a thick cylindrical piece 3 in the form of a short, thick threaded sleeve, which screws into but still projects from plate 1, the projecting portion of the thread receiving nut 6, which is screwed down to compress annular seal 5.
  • This seal 5 resists the return of leaks from the nose of the tuyere, which could be seen between sleeve 3 and pipe 4.
  • This piece 10 forms the protective liquid supply chamber for the pipe. It is arranged annularly around pipe 11, which blows in pure oxygen and is made of copper. it receives the protective liquid through its lateral orifice 12 connected by joint 13 to the protective liquid supply pipe 14.
  • This piece 10 includes a second threaded head 15 onto which screws nut 16 to compress a third annular seal 17, positioned around the oxygen blow pipe 11.
  • This seal 17 resists leaks of liquid between pipe 11 and head 15 of piece 10, as well as the wrenching of pipe 11 from piece 10.
  • Nut 18 screws sealedly onto the end of pipe 11 and thus joins pipe 11 to oxygen conduit 19, through elbow joint 20.
  • This elbow joint 20 is fitted with a threaded cap 21 having a transparent eyehole in its end, which is not visible in FIG. 1.
  • the state of central pipe 11 of the tuyere may be inspected, if desired, between two charges, by direct observation through the eyehole. Also, from time to time between two charges, cap 21 may be unscrewed to measure the remaining length of the central pipe 11 of the tuyere, by means of a straight rod bent back at the end.
  • Inner pipe 11 is also provided externally with special studs 11', in a staggered arrangement, shown in FIG. 3, all projecting to the same height as seen in FIG. 4, which properly centre pipe 11 relative to pipe 4 by contact with the outer pipe 4 and do not noticebly interrupt the peripheral flow of protective liquid.
  • the studs 11' may be of variable height but of constant height along each generatrix of the pipe, as in FIG. 5, to place the inner pipe off center with respect to the outer pipe.
  • outer pipe 4 is provided, in its portion situated above bottom plate 1, with several external discs forming baffles, which are not shown in FIG. 1, to prevent pipe 4 from being torn from dolomite mass 2, and also to resist the return passage of protective liquid along the outer surface of pipe 4.
  • FIG. 2 is a vertical section of the device considered before and during the construction and firing of the tarred dolomite bottom of the converter.
  • cap 22 Before construction of the dolomite bottom, the pro- 5 jecting portion of the thread of sleeve 3 receives closure cap 22, which clamps annular seal 5 against sleeve 3 and pipe 4, as shown in FIG. 2.
  • Cap 22 has a solid head. It forms a closure, as opposed to nut 6 of FIG. 1 which occupies the place of cap 22 when the device is in use.
  • pipe 4 When cap 22 has been screwed onto sleeve 3, pipe 4 is engaged with light friction and slight play, in sleeve 3, from the top.
  • This pipe 4 is made of ordinary steel in the present example.
  • the assembly formed by sleeve 3, seal 5 and cap 22 on the one hand enables pipe 4 to be positioned with precision, cap 22 also serving as a top, and on the other hand keeps it rigidly vertical during the entire period in which the dolomite mixture is laid and vibrated and the bottom is fired. In this way, the rigidity with which pipe 4 is fixed at its lower end is sufficient to dispense, at its upper end, is on the upper surface of the bottom, with all classic methods of fixing the tube assembly 4, such as: jigs, spidersupports, etc.
  • a simple closure cap At this upper end of pipe 4, on the inside of the converter, a simple closure cap, not shown in FIG. 2, protects pipe 4 from any downward penetration of foreign bodies, e.g. tar.
  • one of the main advantages of the embodiment described is to provide the separate supply of two or more fluids in a tuyere having two or more concentric pipes, by means of a device which preserves its tightness not only at high pressures, but also at high temperatures, considerably greater than 250C.
  • a further advantage is to enable easy location of the feed device and of all the pipes forming the tuyere, with the exception of the outermost pipe, after construction and firing of the refractory material of the base, just before the base, already in place in the converter, is put into service.
  • the outermost pipe is provided with baffles so as to prevent these pipes from sliding or being torn from the dolomite, and also so as to prevent the peripheral, protective fluid from leaking through the refractory bottom, along the tuyeres and outside the latter.
  • Another advantage is that the control, while in use, of the remaining length of the tuyere, between two charges of the converter, is rendered possible and easy. 7
  • Device for the separate introduction of at least two distinct, pressurized fluids, into divided multiple feed tuyeres passing through the bottom plate of a converter comprising at least two concentric spaced pipes, each pipe being longer on the feed side than the pipe which surrounds it, atleast one annular compression seal on the outer surface of each pipe, at a level to which the pipe which surrounded it does not extend compression means for compressing each of said seals including two clamping pieces arranged around each pipe one of said clamping pieces forming a feed chamber for the space between the pipes, a hollow, cylindrical sleeve surrounding the outer pipe and attached to the bottom-plate, two annular seals on said outer pipe, the first of said two seals being clamped against said sleeve and against the outer pipe by a nut screwed onto said sleeve to resist leaks of fluids from the tuyere jet seeping back between the outer pipe and said sleeve, the second of said two seals, positioned upstream of said first seal, resisting leak
  • the outer pipe being positioned through the bottom-plate of the converter before construction of the refractory bottom of the converter, means for closing the two open ends of the outer pipe temporarily during the construction of the bottom, the other pipe of the tuyere being mounted in the outermost pipe after construction and firing of the refractory bottom and removal of said closing means.
  • Device for the separate introduction of fluids as described in claim 1 including studs on the pipe within the outer pipe in a staggered arrangement, the projection height of said studs being equal to the width of the passage to be formed between the inner pipe and the outer pipe.
  • the projection height of said studs being variable around the circumference of the inner pipe, and constant along each genatrix of the inner pipe, so that the inner pipe is offcenter to the outer pipe.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US00266256A 1971-07-29 1972-06-26 Device for injecting fluids in tuyeres with separate multiple feeds Expired - Lifetime US3817505A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR7127760A FR2146970A1 (en) 1971-07-29 1971-07-29 Coaxial tube tuyere supply - which operates at high pressures and temps
FR7137308A FR2156422A2 (en) 1971-07-29 1971-10-18 Coaxial tube tuyere supply - which operates at high pressures and temps
FR7215476A FR2182633B2 (xx) 1971-07-29 1972-05-02

Publications (1)

Publication Number Publication Date
US3817505A true US3817505A (en) 1974-06-18

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US00266256A Expired - Lifetime US3817505A (en) 1971-07-29 1972-06-26 Device for injecting fluids in tuyeres with separate multiple feeds

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US (1) US3817505A (xx)
JP (1) JPS5317963B2 (xx)
AU (1) AU467443B2 (xx)
BE (1) BE784806A (xx)
CA (1) CA995456A (xx)
ES (1) ES404547A1 (xx)
FR (1) FR2182633B2 (xx)
GB (1) GB1392225A (xx)
IT (1) IT964640B (xx)
LU (1) LU65699A1 (xx)
NL (1) NL7210419A (xx)
PL (1) PL78143B1 (xx)
SE (1) SE397838B (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023781A (en) * 1973-05-12 1977-05-17 Eisenwerk-Gesellschaft Maximilianshutte Mbh Tuyere for metallurgical vessels
US4050681A (en) * 1973-05-25 1977-09-27 Eisenwerk-Gesellschaft Maximilianshutte Mbh Apparatus for the controlled feeding of a refining gas and of a fluid protective medium
US4097028A (en) * 1975-02-06 1978-06-27 Klockner-Werke Ag Method of melting and apparatus therefor
US4449701A (en) * 1982-08-23 1984-05-22 Pennsylvania Engineering Corporation Tuyere for the injection of gases into a metallurgical vessel
US6351948B1 (en) * 1999-12-02 2002-03-05 Woodward Fst, Inc. Gas turbine engine fuel injector

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5139506A (ja) * 1974-09-30 1976-04-02 Kanai Juyo Kogyo Kk Bokyoshoketsuringu
SE454371B (sv) * 1980-10-10 1988-04-25 Sueddeutsche Kuehler Behr Anslutningsstycke for en dubbelrorskylare
WO1990014264A1 (en) * 1989-05-24 1990-11-29 Robert James Mckay Floatable supports
GB2263696B (en) * 1989-09-22 1994-05-11 British Gas Plc Sealant
ES2702314T3 (es) * 2011-01-27 2019-02-28 St Clair Systems Inc Sistema de manguera coaxial recuperable

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US846475A (en) * 1906-11-08 1907-03-12 Nat Tube Co Peep-sight for twyer-stocks.
US1229938A (en) * 1916-07-19 1917-06-12 George D Golden Twyer.
FR969303A (fr) * 1948-07-09 1950-12-19 Gestion Pour Le Gouvernement M Procédé et dispositif pour l'amélioration de la fabrication de fonte brute et d'acier
US2829960A (en) * 1954-01-18 1958-04-08 Henry J Kaiser Company Method and metallurgical device for the refining of steel
US2863656A (en) * 1955-09-20 1958-12-09 American Brake Shoe Co Injectors for furnaces
GB826442A (en) * 1958-04-11 1960-01-06 Julien Rasquinet Improvements in metallurgical converter bottoms
US3397878A (en) * 1965-11-19 1968-08-20 Union Carbide Corp Under-bath tuyere
US3608880A (en) * 1969-01-28 1971-09-28 Wendel Sidelor And Compagnie D Blast feed device for a steel converter
US3706549A (en) * 1968-02-24 1972-12-19 Maximilianshuette Eisenwerk Method for refining pig-iron into steel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB662159A (en) * 1948-02-19 1951-12-05 Phelps Dodge Corp Improvements in or relating to method and apparatus for removing accretions from thedischarge end of a tuyere
FR1195858A (fr) * 1958-04-11 1959-11-19 Perfectionnement aux dispositifs de fixation et d'étanchéité des tubes à base de cuivre destinés au garnissage des fonds de convertisseurs

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US846475A (en) * 1906-11-08 1907-03-12 Nat Tube Co Peep-sight for twyer-stocks.
US1229938A (en) * 1916-07-19 1917-06-12 George D Golden Twyer.
FR969303A (fr) * 1948-07-09 1950-12-19 Gestion Pour Le Gouvernement M Procédé et dispositif pour l'amélioration de la fabrication de fonte brute et d'acier
US2829960A (en) * 1954-01-18 1958-04-08 Henry J Kaiser Company Method and metallurgical device for the refining of steel
US2863656A (en) * 1955-09-20 1958-12-09 American Brake Shoe Co Injectors for furnaces
GB826442A (en) * 1958-04-11 1960-01-06 Julien Rasquinet Improvements in metallurgical converter bottoms
US3397878A (en) * 1965-11-19 1968-08-20 Union Carbide Corp Under-bath tuyere
US3706549A (en) * 1968-02-24 1972-12-19 Maximilianshuette Eisenwerk Method for refining pig-iron into steel
US3608880A (en) * 1969-01-28 1971-09-28 Wendel Sidelor And Compagnie D Blast feed device for a steel converter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023781A (en) * 1973-05-12 1977-05-17 Eisenwerk-Gesellschaft Maximilianshutte Mbh Tuyere for metallurgical vessels
US4050681A (en) * 1973-05-25 1977-09-27 Eisenwerk-Gesellschaft Maximilianshutte Mbh Apparatus for the controlled feeding of a refining gas and of a fluid protective medium
US4097028A (en) * 1975-02-06 1978-06-27 Klockner-Werke Ag Method of melting and apparatus therefor
US4449701A (en) * 1982-08-23 1984-05-22 Pennsylvania Engineering Corporation Tuyere for the injection of gases into a metallurgical vessel
US6351948B1 (en) * 1999-12-02 2002-03-05 Woodward Fst, Inc. Gas turbine engine fuel injector

Also Published As

Publication number Publication date
JPS4831105A (xx) 1973-04-24
JPS5317963B2 (xx) 1978-06-12
SE397838B (sv) 1977-11-21
LU65699A1 (xx) 1972-10-30
FR2182633A2 (xx) 1973-12-14
PL78143B1 (xx) 1975-04-30
GB1392225A (en) 1975-04-30
AU4363572A (en) 1974-01-03
DE2229022B2 (de) 1974-10-24
FR2182633B2 (xx) 1974-11-08
BE784806A (fr) 1972-10-02
NL7210419A (xx) 1973-01-31
DE2229022A1 (de) 1973-02-15
CA995456A (fr) 1976-08-24
ES404547A1 (es) 1975-06-16
AU467443B2 (en) 1975-12-04
IT964640B (it) 1974-01-31

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