EP0390766A1 - Verfahren zum Injizieren eines Zusatzbrennstoffs in einen Hochofen - Google Patents

Verfahren zum Injizieren eines Zusatzbrennstoffs in einen Hochofen Download PDF

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Publication number
EP0390766A1
EP0390766A1 EP90870043A EP90870043A EP0390766A1 EP 0390766 A1 EP0390766 A1 EP 0390766A1 EP 90870043 A EP90870043 A EP 90870043A EP 90870043 A EP90870043 A EP 90870043A EP 0390766 A1 EP0390766 A1 EP 0390766A1
Authority
EP
European Patent Office
Prior art keywords
jet
auxiliary fuel
blast furnace
injected
oxidizing gas
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.)
Withdrawn
Application number
EP90870043A
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English (en)
French (fr)
Inventor
Arthur Poos
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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 Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of EP0390766A1 publication Critical patent/EP0390766A1/de
Withdrawn legal-status Critical Current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

Definitions

  • the present invention has its origin in a process for injecting auxiliary fuel into a blast furnace.
  • a liquid fuel such as fuel oil, a gaseous fuel such as natural gas or coke oven gas, or a solid fuel such as pulverized coal or lignite.
  • burners oxygen-fuel.
  • Such burners are supplied with auxiliary fuel and with oxygen or with air enriched with oxygen; they must ensure an intimate mixture of the fuel with the oxygen and thus favor the combustion of this fuel in the blast furnace.
  • the current oxy-coal burners produce a central jet of coal surrounded by a peripheral jet, or possibly by a ring of jets of oxygen or oxygen-enriched air.
  • a coal-oxygen jet in hot wind is accompanied by a loss of combustion efficiency, due to a partial dilution of the oxygen by the surrounding hot wind.
  • the present invention therefore provides a method for injecting an auxiliary fuel into a blast furnace, which does not have the above drawbacks and which ensures maximum efficiency of the combustion of this auxiliary fuel in the blast furnace. Therefore, the method of the invention further improves the economy of coke in the blast furnace.
  • a method for injecting an auxiliary fuel into a blast furnace in which an auxiliary fuel and an oxidizing gas are injected together, is characterized in that the oxidizing gas is injected in the form of a jet central and in that said auxiliary fuel is injected in the form of a peripheral jet surrounding, at least partially, the central jet of oxidizing gas.
  • said auxiliary fuel is injected in the form of a single jet which surrounds the central jet of oxidizing gas.
  • said auxiliary fuel is injected in the form of a plurality of jets arranged in a ring around the central jet of oxidizing gas.
  • said auxiliary fuel and the oxidizing gas are injected together preferably in the hot wind supplying the blast furnace; in this case, the auxiliary fuel jet surrounds the central jet of oxidizing gas at least at the point of injection into the hot wind.
  • the method of the invention can be applied in all cases and with all the arrangements for injecting an auxiliary fuel into a blast furnace.
  • FIG. 1 shows a first injection arrangement, in a blast furnace, which comprises a nozzle 1 fitted with an injection nozzle 2 opening into a nozzle 3 situated at the outlet end of the nozzle 1.
  • the injection pipe 2 consists of an inner tube 4 and an outer tube 5 coaxial. This arrangement is known and does not form part of the invention.
  • the nozzle 1 is supplied with hot wind 6 in a conventional manner, from a circular with hot wind not shown.
  • the conventional injection method consists in forming a central jet 7 of charcoal through the inner tube 4, surrounded by a peripheral jet 5 of oxygen or of air enriched in oxygen by the annular duct between the inner 4 and outer 5 tubes (Fig. 1a, 2a).
  • oxygen or oxygen-enriched air is injected in a central jet 8 through the inner tube 4, this central jet 8 being surrounded by a peripheral jet 5 of carbon injected through the annular conduit between the inner 4 and outer 5 tubes (Fig. 2a, 2b).
  • the constitution of the auxiliary fuel and oxygen jet makes it possible to avoid the premature dilution of the oxygen, or of the air enriched with oxygen, by the surrounding hot wind.
  • the oxygen, or the air enriched with oxygen, of the central jet 4 Before reaching the hot wind, the oxygen, or the air enriched with oxygen, of the central jet 4 must in fact first cross the peripheral jet of auxiliary fuel and consequently react with it. A high intensity flame core is thus formed which leads to a marked acceleration of combustion and which therefore makes it possible to increase the quantity of auxiliary fuel which can be injected into the blast furnace.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Manufacture Of Iron (AREA)
EP90870043A 1989-03-28 1990-03-22 Verfahren zum Injizieren eines Zusatzbrennstoffs in einen Hochofen Withdrawn EP0390766A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8900338A BE1003028A6 (fr) 1989-03-28 1989-03-28 Procede pour injecter un combustible auxiliaire dans un haut fourneau.
BE8900338 1989-03-28

Publications (1)

Publication Number Publication Date
EP0390766A1 true EP0390766A1 (de) 1990-10-03

Family

ID=3884091

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90870043A Withdrawn EP0390766A1 (de) 1989-03-28 1990-03-22 Verfahren zum Injizieren eines Zusatzbrennstoffs in einen Hochofen

Country Status (2)

Country Link
EP (1) EP0390766A1 (de)
BE (1) BE1003028A6 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0576869A2 (de) * 1992-07-01 1994-01-05 Paul Wurth S.A. Verfahren und Vorrichtung zum Einblasen von Kohlenstaub in einen Hochofen
FR2702221A1 (fr) * 1993-03-03 1994-09-09 Air Liquide Procédé d'obtention de métal au haut-fourneau ou au cubilot.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR646999A (fr) * 1928-01-06 1928-11-19 Dougree Marihaye Sa Procédé et dispositif de fabrication de fonte
GB1371978A (en) * 1971-12-10 1974-10-30 Centre Rech Metallurgique Injecting liquid fuel into a high-temperature environment by means of a burner
FR2328773A2 (fr) * 1975-10-21 1977-05-20 Creusot Loire Methode et tuyere de soufflage d'un haut fourneau
SU849079A1 (ru) * 1979-11-26 1981-07-23 За витель ;Шз; Ахтаханов и А. Б. Иразю . 1 Г; rv,,-:-; ,., . -м;.;П;; / --iAfr- Способ электрического контрол биОХиМичЕСКОгО COCTABA ВиНОМАТЕ-РиАлОВ
JPS60126508A (ja) * 1983-12-13 1985-07-06 Babcock Hitachi Kk 微粉炭の燃焼装置
WO1989002051A1 (en) * 1987-09-02 1989-03-09 Aga Aktiebolag A method to generate an oxidizing flame, a burner and a use for a burner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR646999A (fr) * 1928-01-06 1928-11-19 Dougree Marihaye Sa Procédé et dispositif de fabrication de fonte
GB1371978A (en) * 1971-12-10 1974-10-30 Centre Rech Metallurgique Injecting liquid fuel into a high-temperature environment by means of a burner
FR2328773A2 (fr) * 1975-10-21 1977-05-20 Creusot Loire Methode et tuyere de soufflage d'un haut fourneau
SU849079A1 (ru) * 1979-11-26 1981-07-23 За витель ;Шз; Ахтаханов и А. Б. Иразю . 1 Г; rv,,-:-; ,., . -м;.;П;; / --iAfr- Способ электрического контрол биОХиМичЕСКОгО COCTABA ВиНОМАТЕ-РиАлОВ
JPS60126508A (ja) * 1983-12-13 1985-07-06 Babcock Hitachi Kk 微粉炭の燃焼装置
WO1989002051A1 (en) * 1987-09-02 1989-03-09 Aga Aktiebolag A method to generate an oxidizing flame, a burner and a use for a burner

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 286 (M-429)[2009], 13 novembre 1985; & JP-A-60 126 508 (BABCOCK HITACHI K.K.) 06-07-1985 *
SOVIET INVENTIONS ILLUSTRATED, semaine E 25, 4 août 1982, Derwent Publications Ltd, Londres, GB; & SU-A-849 079 (FERROUS METALLURGY INST.) 25-08-1981 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0576869A2 (de) * 1992-07-01 1994-01-05 Paul Wurth S.A. Verfahren und Vorrichtung zum Einblasen von Kohlenstaub in einen Hochofen
EP0576869A3 (de) * 1992-07-01 1994-03-09 Wurth Paul Sa
US5451034A (en) * 1992-07-01 1995-09-19 Paul Wurth S.A. Device for the injection of pulverized coal into a blast furnace crucible
FR2702221A1 (fr) * 1993-03-03 1994-09-09 Air Liquide Procédé d'obtention de métal au haut-fourneau ou au cubilot.
WO1994020642A1 (fr) * 1993-03-03 1994-09-15 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procede d'obtention de metal au haut-fourneau ou au cubilot
US5522916A (en) * 1993-03-03 1996-06-04 L'air Liquids, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and apparatus for injecting liquid oxygen

Also Published As

Publication number Publication date
BE1003028A6 (fr) 1991-10-29

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