EP0170566B1 - Verfahren zur Heizung des Heisswindes eines Hochofens mit Hilfe eines Plasmabrenners - Google Patents

Verfahren zur Heizung des Heisswindes eines Hochofens mit Hilfe eines Plasmabrenners Download PDF

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Publication number
EP0170566B1
EP0170566B1 EP85401313A EP85401313A EP0170566B1 EP 0170566 B1 EP0170566 B1 EP 0170566B1 EP 85401313 A EP85401313 A EP 85401313A EP 85401313 A EP85401313 A EP 85401313A EP 0170566 B1 EP0170566 B1 EP 0170566B1
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EP
European Patent Office
Prior art keywords
nozzle
pipe
axis
blast furnace
plasma generator
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Expired
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EP85401313A
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English (en)
French (fr)
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EP0170566A1 (de
Inventor
Didier Pineau
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Airbus Group SAS
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Airbus Group SAS
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Publication date
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Priority to AT85401313T priority Critical patent/ATE31079T1/de
Publication of EP0170566A1 publication Critical patent/EP0170566A1/de
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    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ

Definitions

  • the present invention relates to a method for heating the blowing gas of a blast furnace by a plasma generator.
  • the present invention relates to a process for heating the blowing gas of a blast furnace by a plasma generator not requiring significant modifications to the blast furnace to which it is applied; it does not fundamentally change the operating principle of the blast furnace, and does not call into question the alignment of the nozzle and of the adjacent portion of the blowing gas pipe, while avoiding the risks of excessive wear and destruction of the walls of said pipe by the plasma.
  • the method for heating the blowing gas of a blast furnace by means of a plasma generator, said blowing gas circulating in a pipe into which the nozzle of said plasma generator opens. and which leads to an injection nozzle in said blast furnace, and the axis of said nozzle converging towards that of said pipe, is remarkable in that the acute angle A between the axis of the nozzle and the axis of the pipe is at most equal to 50 °, in that the distance 1 separating the point of intersection of the axis of the pipe and the axis of the nozzle from the center of the outlet orifice of said nozzle is at most equal to , D being the internal diameter of said blowing gas pipe and in that the ratio $, in which d is the internal diameter of said nozzle outlet orifice, is at least equal to 1.5.
  • the Applicant has in fact found that if the conditions mentioned above are met, there is an envelope of blowing gas around the plasma jet, so that the walls of the pipe are isolated from the contact of said plasma jet and therefore protected against the destructive action of it. It is noted that, under the aforementioned conditions, the penetration of the plasma jet creates a turbulence which ensures the sweeping of the internal wall of the pipe by the blowing gas, thus achieving a kind of cladding.
  • the angle A between the axis of the nozzle of the plasma generator and the axis of the blowing gas pipe is close to 40 °.
  • the distance 1 is at least equal to . If the ratio is greater than 4, the distance 1 can tend towards zero and become zero.
  • Figure 1 is a schematic and partial section illustrating the method according to the invention.
  • FIG. 2 is a diagram giving the variations in temperature T (in K) of the wall of the blowing gas pipe as a function of an abscissa measured parallel to the axis of said pipe.
  • FIG. 1 a portion of the wall 1 of a blast furnace is shown, in which a nozzle 2 for injecting blowing gas is arranged.
  • the nozzle 2 is supplied with blowing gas via a pipe 3.
  • the nozzle 2 and the pipe 3 are aligned and have the same axis X-X.
  • the blowing gas circulating in the pipe 3 is for example at a temperature of 1300 ° C., with a pressure of 1.5 bar relative and its flow rate is for example 500 N m 3 / h.
  • a plasma generator 4 is arranged, the nozzle 5 of which emits a jet of plasma through its outlet orifice 6.
  • the nozzle 5 enters the line 3 and its axis YY makes an acute angle A equal to 40 ° relative to the axis XX of the pipe 3.
  • the plasma jet is for example at a temperature of 4300 ° C, with a pressure of 2.5 relative bars and its flow rate is for example 4500 Nm3 / h.
  • FIG. 2 shows, on the one hand, that the temperature of wall 3 which is 1573 K (that is to say 1300 ° C.) upstream of point I, does not believe immediately downstream of it and, on the other hand, that the temperature increase downstream of point 1 is moderate and gradual, evolving steadily, without the appearance of hot spots, towards the mixing temperature which is around 2000 ° C (2273 K).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Plasma Technology (AREA)
  • Furnace Details (AREA)
  • Manufacture Of Iron (AREA)
  • Blast Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Discharge Heating (AREA)
  • Tunnel Furnaces (AREA)

Claims (4)

1. Verfahren zum Vorwärmen des Verbrennungsgases eines Hochofens mittels eines Plasmagenerators (4), wobei das Verbrennungsgas durch eine Zuleitung (3) strömt, in die das Mundstück (5) des Plasmagenerators (4) mündet und die zu einer Zuführungsdüse (2) in dem Hochofen (1) führt, und wobei die Achse (y-y) des Mundstückes (5) konvergiert zu der Achse (x-x) der Zuleitung (3), dadurch gekennzeichnet, daß der spitze Winkel A zwischen der Achse (y-y) des Mundstückes (5) und der Achse (x-x) der Zuleitung (3) höchstens 50° beträgt, daß der Abstand 1 vom Schnittpunkt (I) der Achse (x-x) der Zuleitung (3) und der Achse (y-y) des Mundstücks (5) vom Mittelpunkt (C) der Ausgangsöffnung (6) des Mundstückes (5) höchstens
Figure imgb0009
 beträgt, wobei D der Innendurchmesser der Zuleitung (3) des Verbrennungsgases ist, und daß das Verhältnis d, wobei d der Innendurchmesser der Ausgangsöffnung (6) des Mundstückes (5) ist, mindestens 1,5 beträgt.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Winkel A zwischen der Achse (y-y) des Mundstücks (5) des Plasmagenerators (4) und der Achse (x-x) der Zuleitung (3) des Verbrennungsgases ca. 40° beträgt.
3. Verfahren nach einem der Ansprüche 1 oder 2, wobei das Verhältnis kleiner als 4 ist, dadurch gekennzeichnet, daß der Abstand 1 mindestens gleich
Figure imgb0010
 ist.
4. Verfahren nach einem der Ansprüche 1 oder 2, obei das Verhältnis 9 größer als 4 ist, dadurch gekennzeichnet, daß der Abstand 1 Null ist.
EP85401313A 1984-07-02 1985-06-28 Verfahren zur Heizung des Heisswindes eines Hochofens mit Hilfe eines Plasmabrenners Expired EP0170566B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401313T ATE31079T1 (de) 1984-07-02 1985-06-28 Verfahren zur heizung des heisswindes eines hochofens mit hilfe eines plasmabrenners.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8410467A FR2566802B1 (fr) 1984-07-02 1984-07-02 Procede pour le rechauffage du gaz de soufflage d'un haut fourneau par un generateur de plasma
FR8410467 1984-07-02

Publications (2)

Publication Number Publication Date
EP0170566A1 EP0170566A1 (de) 1986-02-05
EP0170566B1 true EP0170566B1 (de) 1987-11-25

Family

ID=9305698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401313A Expired EP0170566B1 (de) 1984-07-02 1985-06-28 Verfahren zur Heizung des Heisswindes eines Hochofens mit Hilfe eines Plasmabrenners

Country Status (10)

Country Link
US (1) US4670048A (de)
EP (1) EP0170566B1 (de)
JP (1) JPS6119710A (de)
AT (1) ATE31079T1 (de)
AU (1) AU566991B2 (de)
BR (1) BR8503232A (de)
CA (1) CA1232133A (de)
DE (1) DE3561069D1 (de)
FR (1) FR2566802B1 (de)
ZA (1) ZA854623B (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2637443B1 (fr) * 1988-10-03 1990-11-02 Aerospatiale Procede et dispositif pour la mise a poste et le retrait d'une torche a plasma sur un appareil fonctionnant dans des conditions de pression et de temperature interdisant une intervention directe
JPH06220129A (ja) 1993-01-20 1994-08-09 Nippon Oil Co Ltd 高強度・高弾性率ポリエチレン材料の製造方法
US7622693B2 (en) * 2001-07-16 2009-11-24 Foret Plasma Labs, Llc Plasma whirl reactor apparatus and methods of use
US8981250B2 (en) 2001-07-16 2015-03-17 Foret Plasma Labs, Llc Apparatus for treating a substance with wave energy from plasma and an electrical Arc
US10188119B2 (en) 2001-07-16 2019-01-29 Foret Plasma Labs, Llc Method for treating a substance with wave energy from plasma and an electrical arc
US8764978B2 (en) 2001-07-16 2014-07-01 Foret Plasma Labs, Llc System for treating a substance with wave energy from an electrical arc and a second source
US7857972B2 (en) 2003-09-05 2010-12-28 Foret Plasma Labs, Llc Apparatus for treating liquids with wave energy from an electrical arc
WO2008008104A2 (en) 2006-04-05 2008-01-17 Foret Plasma Labs, Llc System, method and apparatus for treating liquids with wave energy from plasma
MX2015007359A (es) 2012-12-11 2015-12-01 Foret Plasma Labs Llc Sistema de reactor de vortice a contracorriente a alta temperatura, metodo y aparato.
WO2014165255A1 (en) 2013-03-12 2014-10-09 Foret Plasma Labs, Llc Apparatus and method for sintering proppants

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209810A (en) * 1962-04-24 1965-10-05 Exxon Research Engineering Co Side-entry fluid fuel injection system for furnaces
GB1068174A (en) * 1963-02-22 1967-05-10 Ass Elect Ind Improvements relating to electric furnaces
FR1599236A (de) * 1968-06-19 1970-07-15
DE2120803A1 (de) * 1971-04-28 1972-11-16 Stahlwerke Peine-Salzgitter AG, 315OPeine Lanze zum Einblasen von Schweröl in die Blasform von Hochöfen
LU81976A1 (fr) * 1979-12-10 1981-07-23 Centre Rech Metallurgique Procede d'injection de gaz reducteurs chauds dans un four a cuve
US4490171A (en) * 1982-03-31 1984-12-25 Kobe Steel, Limited Method and apparatus for injecting pulverized fuel into a blast furnace
SE434650B (sv) * 1982-06-09 1984-08-06 Skf Steel Eng Ab Sett vid utnyttjande av plasmagenerator for hojning av blestertemperaturen i en schaktugn
AU550755B2 (en) * 1983-03-28 1986-04-10 Skf Steel Engineering Ab Method and apparatus for heating process air

Also Published As

Publication number Publication date
JPS6119710A (ja) 1986-01-28
AU566991B2 (en) 1987-11-05
BR8503232A (pt) 1986-03-25
CA1232133A (fr) 1988-02-02
ATE31079T1 (de) 1987-12-15
US4670048A (en) 1987-06-02
FR2566802A1 (fr) 1986-01-03
FR2566802B1 (fr) 1986-12-05
ZA854623B (en) 1986-02-26
EP0170566A1 (de) 1986-02-05
AU4384185A (en) 1986-01-09
DE3561069D1 (en) 1988-01-07
JPS648043B2 (de) 1989-02-13

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