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EP0201441A1 - Vorrichtung zum Einspritzen von pulvrigem Material in einen Ofen, insbesondere einen Hochofen und Verwendung dafür - Google Patents

Vorrichtung zum Einspritzen von pulvrigem Material in einen Ofen, insbesondere einen Hochofen und Verwendung dafür Download PDF

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Publication number
EP0201441A1
EP0201441A1 EP86440033A EP86440033A EP0201441A1 EP 0201441 A1 EP0201441 A1 EP 0201441A1 EP 86440033 A EP86440033 A EP 86440033A EP 86440033 A EP86440033 A EP 86440033A EP 0201441 A1 EP0201441 A1 EP 0201441A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
materials
upstream part
angle
upstream
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.)
Granted
Application number
EP86440033A
Other languages
English (en)
French (fr)
Other versions
EP0201441B1 (de
Inventor
Yann De Lassat De Pressigny
Michel Schneider
Hugues Zanetta
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 AT86440033T priority Critical patent/ATE40411T1/de
Publication of EP0201441A1 publication Critical patent/EP0201441A1/de
Application granted granted Critical
Publication of EP0201441B1 publication Critical patent/EP0201441B1/de
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
    • C21B5/002—Heated electrically (plasma)
    • 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

Definitions

  • the invention relates to the injection of divided solids, preferably pulverulent, in an oven, in particular in a blast furnace.
  • the materials injected can be metal oxides, such as iron ore, and introduced by means of a specialized nozzle directly into the high temperature reaction zone from the top -furnace.
  • these injections are cooling additions, the effect of which must be compensated by a supply of heat advantageously provided by electric arc plasma torches.
  • the object of the invention is to provide a simple and resistant injection device effectively allowing the implementation of the injection of divided solid matter accompanied by a heat supply at high temperature by plasma torches.
  • the device comprises a plasma torch, a nozzle extending the torch and at least one nozzle for injecting solid materials downstream from the torch;
  • the nozzle comprises a substantially cylindrical or frustoconical downstream portion slightly convergent and an upstream portion, frustoconical diverging;
  • the plasma torch is placed coaxially with the nozzle at the entrance to the upstream part of the nozzle, the solids injection nozzle opens obliquely into the upstream part of the nozzle and the taper angle of the upstream part of the nozzle corresponds substantially to the angle of natural expansion of the plasma jet, so that these materials are entrained in the plasma jet and that part of them are projected onto the internal wall of the nozzle.
  • the layer automatically finds an equilibrium thickness.
  • the self-filling effect is favored if the materials are packaged in powder.
  • the internal wall of the nozzle can be specially shaped to favor the attachment of the projected materials.
  • the nozzle 1 internally comprises a substantially cylindrical downstream part 4 of axis 5, which precedes a part upstream 6 in the form of a diverging cone trunk with the same axis 5.
  • the interior passage of the nozzle is cooled by conventional means (water circulation for example) symbolized by the dotted lines 7.
  • a plasma torch 8 is disposed in the axial extension of the nozzle 1, its downstream electrode 9 coming into spherical abutment against the rear of the nozzle 1, so that the plasma jet opens directly into the conical part 6 of the nozzle.
  • the taper thereof is substantially equal to the natural angle of expansion of the plasma jet (commonly 11 °). If this taper is significantly less than this angle, the peripheral velocities of the plasma stream would be too high to allow the deposition of materials in the research wall. Conversely, if it is appreciably greater than this angle, gas recirculation zones would be created around the plasma jet, capable of causing, by vacuum, liquid iron in the nozzle, coming from the blast furnace.
  • Injection nozzles 10 come obliquely into the conical part 6 of the nozzle and are connected to a source of powdery material (iron oxides for example) and carrier gas.
  • the injected pulverulent material meets the plasma jet in a very high temperature zone, over 4000 ° C.
  • the pulverulent material passes into the liquid state, and most of it is carried away by the jet of plasma in the reaction zone of the blast furnace.
  • part of the material tends to press against the cooled internal wall of the nozzle, all the more so since this phenomenon is favored by the swirling effect of the jet.
  • plasma existence of a vortex
  • a layer 11 is then formed on the internal wall of the nozzle 1, the thickness of which is self-regulating: the excess material melts and tends to be carried away by the plasma jet.
  • i1 is preferable that it is not delivered into the nozzle very deep in the plasma jet.
  • the material outlet orifices in the nozzle are flush with the surface of the wall, as shown in the figure.
  • the self-filling of the internal wall of the nozzle can be favored by providing thereon an attachment zone: in particular by having pins or refractory inserts therein. For the same reason, provision can be made for the downstream part 4 of the nozzle to be produced in slightly convergent frustoconical form.
  • the downstream 4 and upstream 6 parts of the nozzle can be made in one piece or in several pieces.
  • the invention extends beyond the example described above and applies to the injection of finely divided solid materials whatever their nature (metal oxide, carbonaceous material such as coal, coke, etc. .) or their conditioning (dry or wet dust, or in the form of pulp, for example an aqueous ore-water or coal-water pulp, etc.).
  • the nozzles 10 can, if desired, extend into the nozzle in the new state. But, from the first commissioning, the portion which exceeds, offered to the plasma jet, will quickly disappear by fusion so that, in use, the injected materials will be delivered to the surface of the wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Glanulating (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Forging (AREA)
  • Powder Metallurgy (AREA)
EP86440033A 1985-05-06 1986-05-02 Vorrichtung zum Einspritzen von pulvrigem Material in einen Ofen, insbesondere einen Hochofen und Verwendung dafür Expired EP0201441B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86440033T ATE40411T1 (de) 1985-05-06 1986-05-02 Vorrichtung zum einspritzen von pulvrigem material in einen ofen, insbesondere einen hochofen und verwendung dafuer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8506849A FR2581395B1 (fr) 1985-05-06 1985-05-06 Dispositif d'injection de matieres solides divisees dans un four, notamment un haut fourneau siderurgique, et applications
FR8506849 1985-05-06

Publications (2)

Publication Number Publication Date
EP0201441A1 true EP0201441A1 (de) 1986-12-17
EP0201441B1 EP0201441B1 (de) 1989-01-25

Family

ID=9318984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86440033A Expired EP0201441B1 (de) 1985-05-06 1986-05-02 Vorrichtung zum Einspritzen von pulvrigem Material in einen Ofen, insbesondere einen Hochofen und Verwendung dafür

Country Status (12)

Country Link
US (1) US4771993A (de)
EP (1) EP0201441B1 (de)
CN (1) CN1004705B (de)
AT (1) ATE40411T1 (de)
AU (1) AU582234B2 (de)
BR (1) BR8602006A (de)
CA (1) CA1283297C (de)
DE (1) DE3661934D1 (de)
ES (1) ES8705044A1 (de)
FR (1) FR2581395B1 (de)
SU (1) SU1473715A3 (de)
ZA (1) ZA863342B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4844737A (en) * 1986-12-27 1989-07-04 Nippon Kokan Kabushiki Kaisha Method for operating a blast furnance by blowing pulverized coal
JPS63171818A (ja) * 1987-01-09 1988-07-15 Nkk Corp 酸素高炉の羽口
US5227117A (en) * 1992-05-29 1993-07-13 Usx Corporation Apparatus for blast furnace fuel injection
CA2073707C (en) * 1992-07-13 1998-04-21 Raymond Lemay Pneumatic injection of powder or granule through submerged tuyeres
DE102006029725B4 (de) * 2006-06-28 2008-08-28 Siemens Ag Verfahren und Vorrichtung zum Einbringen von Stäuben in eine Metallschmelze einer pyrometallurgischen Anlage
US9574770B2 (en) 2012-04-17 2017-02-21 Alter Nrg Corp. Start-up torch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU39431A1 (de) * 1959-12-24 1961-01-18
US3827851A (en) * 1972-10-03 1974-08-06 Peabody Gordon Piatt Combination, oil, gas, and/or solid burner
GB2085575A (en) * 1980-08-22 1982-04-28 Hamworthy Engineering Multi-fuel Burner
US4422624A (en) * 1981-08-27 1983-12-27 Phelps Dodge Corporation Concentrate burner
FR2530666A1 (fr) * 1982-03-31 1984-01-27 Kobe Steel Ltd Procede et appareil d'injection de combustible solide et bruleur pour haut-fourneau
EP0152389A2 (de) * 1984-02-13 1985-08-21 Ingeniörsfirman Petrokraft Ab Brenner zur Verbrennung von staubförmigem Brennstoff

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU423846A1 (ru) * 1973-01-08 1974-04-15 И. И. Кобеза Институт черной металлургии Воздухопровод горячего дутья доменной печи с встроенной камерой горения в прямом участке
US4072502A (en) * 1973-03-26 1978-02-07 Skf Industrial Trading And Development Co. B.V. Method apparatus for increasing blast gas temperature in a shaft furnace
US3892882A (en) * 1973-05-25 1975-07-01 Union Carbide Corp Process for plasma flame spray coating in a sub-atmospheric pressure environment
US4002466A (en) * 1975-11-03 1977-01-11 Bethlehem Steel Corporation Method of reducing ores
SE450898B (sv) * 1981-09-03 1987-08-10 Skf Steel Eng Ab Sett vid anvendning av en plasmagenerator for tillforsel av vermeenergi, samt anordning for genomforande av settet

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU39431A1 (de) * 1959-12-24 1961-01-18
US3827851A (en) * 1972-10-03 1974-08-06 Peabody Gordon Piatt Combination, oil, gas, and/or solid burner
GB2085575A (en) * 1980-08-22 1982-04-28 Hamworthy Engineering Multi-fuel Burner
US4422624A (en) * 1981-08-27 1983-12-27 Phelps Dodge Corporation Concentrate burner
FR2530666A1 (fr) * 1982-03-31 1984-01-27 Kobe Steel Ltd Procede et appareil d'injection de combustible solide et bruleur pour haut-fourneau
EP0152389A2 (de) * 1984-02-13 1985-08-21 Ingeniörsfirman Petrokraft Ab Brenner zur Verbrennung von staubförmigem Brennstoff

Also Published As

Publication number Publication date
CA1283297C (fr) 1991-04-23
ATE40411T1 (de) 1989-02-15
AU5704186A (en) 1986-11-13
ZA863342B (en) 1987-01-28
US4771993A (en) 1988-09-20
AU582234B2 (en) 1989-03-16
DE3661934D1 (en) 1989-03-02
ES8705044A1 (es) 1987-04-16
EP0201441B1 (de) 1989-01-25
CN86103851A (zh) 1986-12-31
BR8602006A (pt) 1987-01-06
SU1473715A3 (ru) 1989-04-15
CN1004705B (zh) 1989-07-05
FR2581395A1 (fr) 1986-11-07
ES554651A0 (es) 1987-04-16
FR2581395B1 (fr) 1992-09-18

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