US3840219A - Tuyeres - Google Patents

Tuyeres Download PDF

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Publication number
US3840219A
US3840219A US00385058A US38505873A US3840219A US 3840219 A US3840219 A US 3840219A US 00385058 A US00385058 A US 00385058A US 38505873 A US38505873 A US 38505873A US 3840219 A US3840219 A US 3840219A
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US
United States
Prior art keywords
tube
tuyere
hollow
baffle
nose
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
US00385058A
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English (en)
Inventor
A Sheridan
I Stewart
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.)
British Steel PLC
Original Assignee
British Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by British Steel Corp filed Critical British Steel Corp
Application granted granted Critical
Publication of US3840219A publication Critical patent/US3840219A/en
Assigned to BRITISH STEEL PLC reassignment BRITISH STEEL PLC CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). (BRITISH STEEL ACT 1988 (APPOINTED ORDER 1988, DATED AUG. 2, 1988. Assignors: BRITISH STEEL CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres

Definitions

  • the tube passes through a half-baffle and the design of this member and'the tube termination are such as to promote the maintenance of much higher velocities of the water coolant in the nose portion than hitherto. Good circulation is also maintained in the main body, the water following a spiral pattern
  • the tuyere is preferably monolithic and may readily be made from a single copper casting.
  • the present invention provides a tuyere comprising an annular body of hollowed section for accommodating a liquid coolant, and an inlet tube extending from the rear end of the body into the hollow and terminating adjacent the nose in a lateral aperture, the body having an outlet in the rear and a baffle fin adjacent the nose extending around the interior of the hollow body and through which the tube extends, the disposition and design of the tube termination and the baffle together promoting a uniform unidirectional flow pattern around the nose.
  • the baffle extends from the outer wall of the body by an amount greater than half the width of the hollow, and a gap may be provided in an otherwise continuous symmetrical design of this baffle for accommodating the tube. Further baffle fins of this type may be provided along the length of the body.
  • the whole body of the tuyere may be monolithic and may be cast in a conventional manner in, e.g. copper alternatively, the tuyere may be forged, the baffle fin being welded in position.
  • the pressure drop may be higher than that experienced on current tuyeres of other designs depending on the diameter of the inlet tube but in the majority of cases this will be masked by the much greater pressure drops occasioned by the entry and exit pipework. Thus this or hot blast cupolas etc.
  • This invention thus provides a tuyere of markedly improved efficiency and is relatively inexpensive to manufacture since traditional casting techniques may be employed, there being no problem of core removal, cleaning out, etc.
  • FIG. 1 illustrates an axial section through a tuyere in accordance with this invention
  • FIG. 2 illustrates a section on A A in FIG. 1;
  • FIG. 3 illustrates a detail of the inlet tube termination
  • FIG. 4 illustrates an axial section through another tuyere in accordance with this invention incorporating a dipped nose
  • FIG. 5 illustrates a detail of the inlet tube termination in the FIG. 4 embodiment.
  • FIG. 6 illustrates a detail of an alternative inlet tube termination
  • FIG. 7 illustrates an axial section through a forged tuyere in accordance with this invention.
  • the tuyere comprises a cast copper body 1 of hollowed annular section having a central bore 2 through which a gas, e.g. air, is blasted.
  • a gas e.g. air
  • baffle fin 6 extends inwardly around the outer wall of the body by an amount slightly in excess of half the width of the hollow and is continuous apart from a break through which the tube 5 passes.
  • This tube terminates in the nose of the tuyere and has an aperture 7 in its side.
  • the tube termination/aperture is produced by mitring a similar gauge tube 8 to the open end (FIG. 3), e.g. by brazing, and then machining a vee slot into the mitred section so as to define the aperture.
  • This aperture is oriented tangentially in the annular gap and lies substantially midway between the baffle and the end wall at the nose.
  • the tube diameter may conveniently be 1 inch.
  • a pressure drop of about 10 psi. is realised and this is quite acceptable for normal plant usage.
  • FIG. 4 there is shown a dip nose tuyere by which the blast is directed at an angle to the major axis of the tuyere.
  • the tuyere orifice (9) is inclined downwardly.
  • the tube is constructed differently. In particular it is cranked at 10 so that it lies closer to the inner wall of the tuyere body than the outer wall, promoting better cooling over this latter region where it is more necessary.
  • the tube termination/aperture is also different from the previous one shown.
  • a slot is machined in the lower side wall 11 so as to define a square-section recess 12 and an inclined disc 13 is brazed on to the tube end.
  • the aperture thus formed is again oriented so as to promote tangential flow in the nose portion.
  • modified tube termination and/or the cranked tube may of course also be used in the tuyere previously shown.
  • the shape of the tuyere, the baffle and the tube are not to be regarded as restrictive and the relative dimensions of these parts are not necessarily those giving optimum performance.
  • the tube termination may indeed simply be constituted by a right-angled bend the cross-section then being circular throughout as shown in FIG. 6.
  • the tuyere may not necessarily be monolithic and may be fabricated, e.g. by forging outer and inner cylindrical sections 14 and 15 (FIG. 7) and joining them by a weld as shown.
  • the rear section 16 would be welded to the body thus formed and the baffle would likewise also be welded in position. As shown, a plurality of such baffles may be incorporated in the tuyere and this latter feature may equally well be adopted in cast tuyeres.
  • a tuyere comprising an annular body of hollowed section for receiving a liquid coolant. said body defining an outlet at its rear end communicating with the hollow.
  • an inlet tube extending from the rear end of the body into the hollow and terminating adjacent the nose of the tuyere in a lateral aperture
  • baffle fin located adjacent the nose and extending around the interior of the hollow body partially across the width of the hollow. said tube extending through the baffle fin, the disposition and design of the tube termination and the baffle fin together promoting a uniform unidirectional flow pattern of the coolant around the nose.
  • baffle fin defines a gap in its otherwise symmetrical design whereby to accommodate the tube, the tube lying closer to the downstream than the upstream end of the gap.
  • baffle fin extends from the outer wall of the body by an amount greater than half the width of the hollow.
  • a tuyere comprising an annular body of hollowed section for receiving water coolant, said body defining a water outlet at its rear end communicating with the hollow, I
  • an inlet tube for said water extending from the rear end of the body into the hollow and terminating adjacent the nose of the tuyere in a lateral aperture.
  • baffle fin located adjacent the nose and extending around the interior of the hollow body, the baffle fin extending inwardly from the outer wall of the body partially across the hollow by an amount greater than half the width thereof, and said tube extending through the baffle fin, the disposition and design of the tube termination and the baffle fin together promoting a uniform unidirectional flow pattern of the water around the nose and generating a spiral flow pattern throughout the hollow body.
  • baffle fin is integrally cast with the annular body and defines a gap in its otherwise symmetrical design whereby to accommodate the tube. the tube lying closer to the downstream than the upstream end of the gap.
  • a tuyere according to claim 8 wherein a plurality of said baffle fins are disposed along the body.
  • a tuyere according to claim 6 wherein said body comprises a plurality of forged sections, said sections being secured together by welded joints, and wherein said baffle fin is welded to the forged body, the baffle fin defining a gap in its otherwise symmetrical design whereby to accommodate the tube, the tube lying closer to the downstream than the upstream end of the

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
US00385058A 1972-08-23 1973-08-02 Tuyeres Expired - Lifetime US3840219A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3924772A GB1407078A (en) 1972-08-23 1972-08-23 Tuyeres

Publications (1)

Publication Number Publication Date
US3840219A true US3840219A (en) 1974-10-08

Family

ID=10408504

Family Applications (1)

Application Number Title Priority Date Filing Date
US00385058A Expired - Lifetime US3840219A (en) 1972-08-23 1973-08-02 Tuyeres

Country Status (12)

Country Link
US (1) US3840219A (enrdf_load_stackoverflow)
JP (1) JPS4986202A (enrdf_load_stackoverflow)
CA (1) CA998527A (enrdf_load_stackoverflow)
DE (1) DE2339997A1 (enrdf_load_stackoverflow)
ES (1) ES418093A1 (enrdf_load_stackoverflow)
FR (1) FR2197454A5 (enrdf_load_stackoverflow)
GB (1) GB1407078A (enrdf_load_stackoverflow)
IT (1) IT996612B (enrdf_load_stackoverflow)
LU (1) LU68272A1 (enrdf_load_stackoverflow)
NL (1) NL7311530A (enrdf_load_stackoverflow)
SE (1) SE401521B (enrdf_load_stackoverflow)
ZA (1) ZA735284B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140302A (en) * 1978-02-27 1979-02-20 Lynch Roland H Jet impingement cooling device
US4166433A (en) * 1976-11-25 1979-09-04 British Steel Corporation Tuyeres with independent cooling circuits for nose and body portions
US4564143A (en) * 1981-05-15 1986-01-14 Francois Touze Hot-blast nozzles, particularly for blast furnaces
US6446565B2 (en) * 1999-02-05 2002-09-10 Mannesmannröhren-Werke Ag Blast tuyere for shaft furnaces, in particular blast furnaces or hot-blast cupola furnaces
US20050039578A1 (en) * 2001-10-03 2005-02-24 De Vries Paul Alexander Method and device for controlling the proportion of crystals in a liquid-crystal mixture
US20050178239A1 (en) * 2002-07-05 2005-08-18 Corus Technology Bv Method for fractional crystallisation of a metal
US20070023110A1 (en) * 2005-07-26 2007-02-01 Corus Technology Bv Method for analyzing liquid metal and device for use in this method
US20070272057A1 (en) * 2003-11-19 2007-11-29 Corus Technology Bv Method of Cooling Molten Metal During Fractional Crystallisation
US20080000326A1 (en) * 2004-03-19 2008-01-03 Corus Technology Bv Method for the Purification of a Molten Metal
US20090301259A1 (en) * 2006-06-22 2009-12-10 Aleris Switzerland Gmbh Method for the separation of molten aluminium and solid inclusions
US20090308203A1 (en) * 2006-07-07 2009-12-17 Aleris Switzerland Gmbh C/O K+P Treuhandgesellschaft Method and device for metal purification and separation of purified metal from metal mother liquid such as aluminium
US20100024602A1 (en) * 2006-06-28 2010-02-04 Aleris Switzwerland Gmbh Crystallisation method for the purification of a molten metal, in particular recycled aluminium

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2350073B1 (es) * 2009-05-28 2011-11-07 Fernando Jose De La Dehesa Calles Tobera de doble capa de salida de quemadores que calienta fluido térmico para otros usos.

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166433A (en) * 1976-11-25 1979-09-04 British Steel Corporation Tuyeres with independent cooling circuits for nose and body portions
US4140302A (en) * 1978-02-27 1979-02-20 Lynch Roland H Jet impingement cooling device
US4564143A (en) * 1981-05-15 1986-01-14 Francois Touze Hot-blast nozzles, particularly for blast furnaces
US6446565B2 (en) * 1999-02-05 2002-09-10 Mannesmannröhren-Werke Ag Blast tuyere for shaft furnaces, in particular blast furnaces or hot-blast cupola furnaces
US20050039578A1 (en) * 2001-10-03 2005-02-24 De Vries Paul Alexander Method and device for controlling the proportion of crystals in a liquid-crystal mixture
US7442228B2 (en) 2001-10-03 2008-10-28 Aleris Switzerland Gmbh C/O K+P Treuhangesellschaft Method and device for controlling the proportion of crystals in a liquid-crystal mixture
US20050178239A1 (en) * 2002-07-05 2005-08-18 Corus Technology Bv Method for fractional crystallisation of a metal
US7648559B2 (en) 2002-07-05 2010-01-19 Aleris Switzerland Gmbh C/O K+P Treuhangesellschaft Method for fractional crystallisation of a metal
US7537639B2 (en) 2003-11-19 2009-05-26 Aleris Switzerland Gmbh Method of cooling molten metal during fractional crystallisation
US20070272057A1 (en) * 2003-11-19 2007-11-29 Corus Technology Bv Method of Cooling Molten Metal During Fractional Crystallisation
US20080000326A1 (en) * 2004-03-19 2008-01-03 Corus Technology Bv Method for the Purification of a Molten Metal
US7531023B2 (en) 2004-03-19 2009-05-12 Aleris Switzerland Gmbh Method for the purification of a molten metal
US20070023110A1 (en) * 2005-07-26 2007-02-01 Corus Technology Bv Method for analyzing liquid metal and device for use in this method
US20090301259A1 (en) * 2006-06-22 2009-12-10 Aleris Switzerland Gmbh Method for the separation of molten aluminium and solid inclusions
US8313554B2 (en) 2006-06-22 2012-11-20 Aleris Switzerland Gmbh Method for the separation of molten aluminium and solid inclusions
US20100024602A1 (en) * 2006-06-28 2010-02-04 Aleris Switzwerland Gmbh Crystallisation method for the purification of a molten metal, in particular recycled aluminium
US7892318B2 (en) 2006-06-28 2011-02-22 Aleris Switzerland Gmbh C/O K+P Treuhandgesellschaft Crystallisation method for the purification of a molten metal, in particular recycled aluminium
US20090308203A1 (en) * 2006-07-07 2009-12-17 Aleris Switzerland Gmbh C/O K+P Treuhandgesellschaft Method and device for metal purification and separation of purified metal from metal mother liquid such as aluminium
US7955414B2 (en) 2006-07-07 2011-06-07 Aleris Switzerland Gmbh Method and device for metal purification and separation of purified metal from metal mother liquid such as aluminium

Also Published As

Publication number Publication date
SE401521B (sv) 1978-05-16
IT996612B (it) 1975-12-10
FR2197454A5 (enrdf_load_stackoverflow) 1974-03-22
CA998527A (en) 1976-10-19
DE2339997A1 (de) 1974-03-07
GB1407078A (en) 1975-09-24
NL7311530A (enrdf_load_stackoverflow) 1974-02-26
LU68272A1 (enrdf_load_stackoverflow) 1973-10-24
ZA735284B (en) 1974-07-31
JPS4986202A (enrdf_load_stackoverflow) 1974-08-19
ES418093A1 (es) 1976-03-16

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AS Assignment

Owner name: BRITISH STEEL PLC

Free format text: CHANGE OF NAME;ASSIGNOR:BRITISH STEEL CORPORATION;REEL/FRAME:004993/0383

Effective date: 19881006