EP0199662B1 - Dispositif d'injection de matière pulvérulente, notamment de charbon, dans un haut-fourneau - Google Patents

Dispositif d'injection de matière pulvérulente, notamment de charbon, dans un haut-fourneau Download PDF

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Publication number
EP0199662B1
EP0199662B1 EP86440021A EP86440021A EP0199662B1 EP 0199662 B1 EP0199662 B1 EP 0199662B1 EP 86440021 A EP86440021 A EP 86440021A EP 86440021 A EP86440021 A EP 86440021A EP 0199662 B1 EP0199662 B1 EP 0199662B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
pipe
blast furnace
twyere
axis
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
Application number
EP86440021A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0199662A1 (fr
Inventor
Yann De Lassat De Pressigny
Michel Schneider
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT86440021T priority Critical patent/ATE45593T1/de
Publication of EP0199662A1 publication Critical patent/EP0199662A1/fr
Application granted granted Critical
Publication of EP0199662B1 publication Critical patent/EP0199662B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/002—Heated electrically (plasma)

Definitions

  • the invention relates to the injection of pulverulent materials into a blast furnace, and in particular coal.
  • a known injection device comprises a hot-wind nozzle opening into the blast furnace, a nozzle blocked against the nozzle and coaxial with the latter for the supply of hot wind, a connection produced obliquely on the nozzle and oriented towards the nozzle , and an injection rod passing through this connection and opening into the nozzle.
  • the injection rod is a straight rod whose inclination on the axis of the nozzle is that of the nozzle of the nozzle, generally 15 °.
  • the object of the invention is to propose a new injection device having more flexibility and making it possible to explore a larger region of the nozzle to stop there the choice of the ideal position of the discharge end of the cane d 'injection.
  • the invention achieves its object by the fact that the axis of the injection rod is substantially an arc, the convexity of which is turned towards the axis of the nozzle and the nozzle. Indeed, thanks to this curved rod, it is possible by an adequate movement of rotation of the rod around its center of curvature, to make it penetrate for quite long distances inside the nozzle, while retaining a suitable inclination of the end of the rod on the axis of the nozzle.
  • the radius of curvature of the rod is at least equal to a hundred times its internal diameter.
  • a sufficiently large radius of curvature has the additional advantage of being able to provide a nozzle for the nozzle, the internal passage of which has a section making it possible to accommodate either a straight rod or a curved rod.
  • the adaptation of the curved rod makes it possible to advance its discharge orifice sufficiently in front of the nozzle to avoid the problems linked to the excessive temperature (and to the mechanical abrasion of the coal).
  • a cooling system is advantageously provided for the rod itself, as well as for the nozzle and its tapping.
  • FIG. 1 shows the wind nozzle 1 conventionally fixed on the shield 2 of the blast furnace by means of the tympe 3 and the chapel 4.
  • the nose 5 of the nozzle 1 opens inside the blast furnace above the crucible.
  • the nozzle 6 Locked against a spherical bearing at the rear of the nozzle 1, the nozzle 6 follows it coaxially, to conduct the hot wind which it receives from the wind-bend elbow 7 and from the other known organs for bringing the wind to blast furnace.
  • the nozzle 6 has an oblique connection 8, inclined at 15 ° on the axis 9 of the nozzle and the nozzle, and provided for the insertion of an injection rod.
  • the injection rod is a straight rod whose axis is coincident or parallel with the axis 10 of the nozzle 8. It opens into the nozzle, at the point of intersection of the axes 9 and 10, that is to say that it penetrates into the nozzle over a distance of about 7 cm at best, compared to the 50 to 60 cm length of the nozzle.
  • the rod is curved, as shown in dashes in FIG. 2, its axis 11. This forms an arc of a circle whose radius is at least equal to a hundred times the internal radius of the rod to avoid problems of cane wear by the coal it carries.
  • an injection rod whose internal diameter is 20 mm, and the radius of curvature is 3600 mm.
  • the rod by a displacement (rotation having for center the center of curvature of the rod) during which its axis 11 always remains located on the same circle, the exit orifice of the rod s' moving more or less from point J forwards or backwards: in all cases, the rod opens into the nozzle at an angle less than the inclination of the axis 10.
  • the section of the internal passage 12 of the nozzle 8 of the nozzle is advantageously that shown in FIG. 3, formed by two semicircles connected by two rectilinear parts.
  • the radius of these semicircles and the length of the straight parts is 25 mm.
  • This shape allows the choice, without changing the nozzle, of the curved rod of the invention or of a traditional straight rod.
  • the invention finds a more particularly advantageous application when, as known per se, a plasma torch 13 (fig. 1) is used to overheat the wind.
  • the nozzle 6 is lined with a refractory 14 and provided with a water cooling system 15 (FIGS. 1 and 3).
  • the high temperature allows the coal to burn as soon as it leaves the injection pipe. It is therefore important to make the outlet of the injection rod penetrate further into the nozzle, compared to the conventional installation of a rigid rod, in order to promote the holding of the nozzle.
  • the curved rod according to the invention solves this problem.
  • the curved rod must also be able to withstand the high temperatures encountered when using a plasma torch. This is why a rod is provided for cooling, for example by one of the following three arrangements.
  • a double annular circulation jacket formed of water is produced around the central duct of the rod carrying the mixture of air and coal. Given the limited space available, it is cooling by a water slide (approximately 2 mm thick): the same ultra-pure, deionized and demineralized water is advantageously used for this purpose. , required for cooling the plasma torch.
  • the central duct of the rod is surrounded by an annular air injection chamber under high flow (for example 80 m 3 / h ) .
  • the central conduit 16 (cf. fig. 3) is surrounded by an annular chamber 17 into which a liquid hydrocarbon is injected.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Nozzles (AREA)
  • Manufacture Of Iron (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP86440021A 1985-04-15 1986-03-18 Dispositif d'injection de matière pulvérulente, notamment de charbon, dans un haut-fourneau Expired EP0199662B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86440021T ATE45593T1 (de) 1985-04-15 1986-03-18 Vorrichtung zum einblasen von zerkleinertem feststoffmaterial, insbesondere von kohlenstaub in einen hochofen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8505635 1985-04-15
FR8505635A FR2580296B1 (fr) 1985-04-15 1985-04-15 Dispositif d'injection de matiere pulverulente, notamment de charbon, dans un haut fourneau

Publications (2)

Publication Number Publication Date
EP0199662A1 EP0199662A1 (fr) 1986-10-29
EP0199662B1 true EP0199662B1 (fr) 1989-08-16

Family

ID=9318224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86440021A Expired EP0199662B1 (fr) 1985-04-15 1986-03-18 Dispositif d'injection de matière pulvérulente, notamment de charbon, dans un haut-fourneau

Country Status (12)

Country Link
US (1) US4700930A (enrdf_load_stackoverflow)
EP (1) EP0199662B1 (enrdf_load_stackoverflow)
JP (1) JPH0245757Y2 (enrdf_load_stackoverflow)
CN (1) CN1003863B (enrdf_load_stackoverflow)
AT (1) ATE45593T1 (enrdf_load_stackoverflow)
BR (1) BR8601681A (enrdf_load_stackoverflow)
CA (1) CA1278680C (enrdf_load_stackoverflow)
DE (1) DE3665076D1 (enrdf_load_stackoverflow)
ES (1) ES8703527A1 (enrdf_load_stackoverflow)
FR (1) FR2580296B1 (enrdf_load_stackoverflow)
SU (1) SU1400512A3 (enrdf_load_stackoverflow)
ZA (1) ZA862764B (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4136274A1 (de) * 1991-11-04 1993-05-06 Kortec Ag, Zug, Ch Verfahren und vorrichtung zum schutz einer in einer heisswindleitung eines hochofens angeordneten einblasvorrichtung
US5227117A (en) * 1992-05-29 1993-07-13 Usx Corporation Apparatus for blast furnace fuel injection
DE69322002T2 (de) * 1992-07-01 1999-04-01 Paul Wurth S.A., Luxemburg/Luxembourg Vorrichtung zum Einblasen von Kohlenstaub in einen Hochofen
CA2073707C (en) * 1992-07-13 1998-04-21 Raymond Lemay Pneumatic injection of powder or granule through submerged tuyeres
JP5125819B2 (ja) * 2008-07-02 2013-01-23 Ｊｆｅスチール株式会社 竪型溶解炉および溶銑製造方法
LU91691B1 (en) * 2010-05-26 2011-11-28 Wurth Paul Sa Tuyere stock arrangement of a blast furnace
CN101864503A (zh) * 2010-06-22 2010-10-20 新兴河北工程技术有限公司 水冷式直吹管

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR577454A (fr) * 1922-12-18 1924-09-05 Cie Auxiliaire D Electricite E Perfectionnements aux brûleurs à charbon pulvérisé
FR586015A (fr) * 1923-11-23 1925-03-13 Ile Des Brevets Joullie Soc Ci Dispositif d'injection de combustible d'un haut fourneau et autres appareils métaliurgiques
US3166621A (en) * 1961-03-16 1965-01-19 Colorado Fuel & Iron Corp Burner tuyere arrangement for a blast furnace
GB951043A (en) * 1962-01-12 1964-03-04 British Petroleum Co Improvements relating to the injection of fluid fuels into blast furnaces
DE1433317A1 (de) * 1962-06-23 1968-11-07 Salzgitter Huettenwerk Ag Vorrichtung zum Einfuehren von fluessigen,gas- oder staubfoermigen Brennstoffen in das Gestell eines Schachtofens,vornehmlich eines Hochofens
FR1559679A (enrdf_load_stackoverflow) * 1967-12-08 1969-03-14
DE2912441C2 (de) * 1979-03-29 1982-09-23 ARBED S.A., 2930 Luxembourg Verfahren zum kontinuierlichen Einblasen von feinkörniger Braunkohle in das Gestell eines Hochofens
US4278367A (en) * 1979-07-05 1981-07-14 Cyclonaire Corporation Feeder apparatus for pneumatic conveying lines
FR2501833B1 (fr) * 1981-03-10 1985-05-31 Stein Industrie Dispositif d'introduction et de combustion d'un combustible solide pulverise dans une enceinte sous pression
US4490171A (en) * 1982-03-31 1984-12-25 Kobe Steel, Limited Method and apparatus for injecting pulverized fuel into a blast furnace

Also Published As

Publication number Publication date
ZA862764B (en) 1986-12-30
JPS6236390U (enrdf_load_stackoverflow) 1987-03-04
SU1400512A3 (ru) 1988-05-30
ATE45593T1 (de) 1989-09-15
CN86102628A (zh) 1986-11-19
CA1278680C (fr) 1991-01-08
ES8703527A1 (es) 1987-02-16
DE3665076D1 (en) 1989-09-21
CN1003863B (zh) 1989-04-12
EP0199662A1 (fr) 1986-10-29
BR8601681A (pt) 1986-12-16
FR2580296A1 (fr) 1986-10-17
JPH0245757Y2 (enrdf_load_stackoverflow) 1990-12-04
US4700930A (en) 1987-10-20
ES553955A0 (es) 1987-02-16
FR2580296B1 (fr) 1987-07-10

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