[go: up one dir, main page]

EP0565695A1 - Procede et dispositif de protection d'un systeme d'insufflation monte dans une conduite de vent chaud d'un haut-fourneau - Google Patents

Procede et dispositif de protection d'un systeme d'insufflation monte dans une conduite de vent chaud d'un haut-fourneau

Info

Publication number
EP0565695A1
EP0565695A1 EP92923142A EP92923142A EP0565695A1 EP 0565695 A1 EP0565695 A1 EP 0565695A1 EP 92923142 A EP92923142 A EP 92923142A EP 92923142 A EP92923142 A EP 92923142A EP 0565695 A1 EP0565695 A1 EP 0565695A1
Authority
EP
European Patent Office
Prior art keywords
channel
lance
blowing
hot wind
oxygen
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Withdrawn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
EP92923142A
Other languages
German (de)
English (en)
Inventor
William Wells
Ralph Weber
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.)
Kortec AG
Original Assignee
Kortec AG
Mannesmann AG
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 Kortec AG, Mannesmann AG filed Critical Kortec AG
Publication of EP0565695A1 publication Critical patent/EP0565695A1/fr
Withdrawn legal-status Critical Current

Links

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 invention relates to a method and a device according to the preambles of claims 1 and 5.
  • Injection lances with which coal dust as a substitute fuel, for example for lumpy coke and heating oil, are blown into the hot wind pipe of a blast furnace by means of a carrier gas, have long been used in the smelting of iron ores (Stahl und Eisen 110, 1990, p. 35 up to 40).
  • the known blowing lance consists of a central tube that is used to supply heating oil.
  • the central tube is surrounded concentrically by a multi-walled outer tube, in which oxygen is supplied, which serves to atomize and burn the fuel oil emerging from the central tube.
  • the outer tube has a coolant channel, which enables coolant circulation in the outer tube via a feed connector and a discharge connector.
  • the present invention is based on the object of making available a method and a device for carrying out the method which enable stronger cooling of the blowing lance which reduces the burn-back.
  • the method according to the invention is characterized by the features of claim 1.
  • the coal dust is blown in through the central channel and a mixture of oxygen-containing gas and the cooling fluid is blown in through an annular channel surrounding the central channel.
  • coal dust is blown through the central channel, oxygen-containing gas through the inner and the cooling fluid through the outer ring channel. This enables independent pressure control for the oxygen-containing gas and the cooling fluid.
  • water is used as the cooling fluid, which is atomized by means of a carrier gas and blown in as a spray mist.
  • a carrier gas atomized by means of a carrier gas and blown in as a spray mist.
  • microdroplets are formed which are at least partially in contact with the pipe wall to be cooled and, because of their enthalpy of evaporation, provide a particularly effective part of the total cooling, which, moreover, occurs as a result of heat transfer from the pipe wall to the flow past Cooling fluid, which is formed from the water and the carrier gas, takes place.
  • the device according to the invention is characterized by the features of claim 5.
  • the preferred exemplary embodiments of the invention are explained in more detail with reference to the following drawings. It shows:
  • FIG. 1 shows a blowing device for carrying out the method according to the invention, which is inserted into a hot wind pipe of a blast furnace;
  • FIG. 2 shows a blow-in lance of a blow-in device according to FIG. 1 into a hot-wind pipe of a blast furnace in a longitudinal section;
  • FIG. 3 shows the blowing lance according to FIG. 2 in a cross section along the section line III-III in FIG. 2;
  • FIG. 4 shows a further embodiment of a blowing lance in longitudinal section
  • FIG. 5 shows a cross section of the blowing lance according to FIG. 4 along the section line V-V in FIG. 4;
  • FIG. 6 shows an injection device according to FIG. 1 inserted in the hot wind line of a blast furnace with an injection lance accommodated in a receiving device.
  • FIG. 1 shows a blowing device 10 with a blowing lance 11 and a receiving device 12 for receiving the blowing lance 11 in an outer wall 13 of a hot wind pipe 14.
  • the hot wind line 14 is used to supply hot air at around 1200 ° C. into the interior of a blast furnace, not shown here.
  • the hot wind pipe 14 opens into a water-cooled wind mold 15, which is received by a water-cooled wind mold insert 16.
  • the windform insert 16 is inserted into a wall 17 of the blast furnace.
  • the blowing device 10 serves to blow coal dust into the hot wind pipe 14 of the blast furnace.
  • the coal dust emerging from the blowing lance 11 into the hot wind is heated by the hot wind and ignited at the latest when it enters the blast furnace.
  • FIG. 2 and 3 show a first embodiment of the blowing lance 11. It consists of a central inner tube 18 to which an outer tube 19 is arranged concentrically.
  • the inner tube 18 forms a central channel 20 and the outer tube 19 by a radial spacing from the inner tube 18 an annular channel 21 (FIG. 3).
  • the inner tube 18 is provided with an inlet 22 for supplying a mixture of a carrier gas and coal dust.
  • the outer tube 19 has two inlets 24, 25 which are separated from one another by a partition 23, the inlet 24, which is towards a closed tube end 26, being used for the supply of water and the adjacent inlet 25 for the supply of oxygen.
  • the blowing lance 11 shown in FIGS. 2 and 3 can be used to carry out the method known per se by blowing coal dust through the central inner tube 18 by means of a carrier gas and supplying oxygen through the ring channel 21 for better combustion of the coal dust.
  • the oxygen carried in the ring channel 21 is now added water through the inlet 24 so that the water is entrained by the oxygen flowing past the partition 23 and atomized to form fine microdroplets.
  • the spray of oxygen and water formed in this way serves both to burn the coal dust emerging from the duct 20 and to cool the tube walls of the inner tube 18 and the outer tube 19 including the outlet cross section 27 of the blowing lance 11, which, as shown in FIG. 1, the hot wind flow in the hot wind line 14 is exposed.
  • the oxygen thus serves not only for the better combustion of the coal dust, but also as a carrier gas for the atomized water.
  • the blowing lance 28 consists of a central inner tube 29, a middle tube 30 and an outer tube 31.
  • the inner tube 29 and the middle tube 30 and the outer tube 31 are arranged concentrically and with radially spaced tube walls.
  • the inner tube 29 forms a central channel 32; the inner tube 29 and the middle tube 30 an inner ring channel 33; the middle tube 30 and the outer tube 31 an outer ring channel 34.
  • the inner tube 29 has at its closed tube end 35 an inlet 36 for supplying a mixture of a carrier gas and coal dust.
  • the central tube 30 has an inlet 38 in the region of its closed tube end 37 for supplying oxygen.
  • the outer tube 31 finally has, in the region of its closed tube end 39, an inlet 40 arranged directly at the tube end for the supply of water and an adjacent inlet 42 separated by a partition 41 for supplying air as a carrier gas.
  • coal dust suspended in a carrier gas is blown through the central duct 32, oxygen is blown through the inner ring duct 33 and a spray of water with air as the carrier gas is blown through the outer ring duct 34.
  • the separate supply of the cooling fluid and the oxygen enables the discharge quantities of these media to be controlled independently of one another.
  • 6 shows the blowing device 10 with the receiving device 12 for receiving the blowing lance 11 or 28.
  • the receiving device 12 has a connection area 44 with which it is inserted into a connection opening 45 of the outer wall 13 of the hot wind pipe 14.
  • the blowing lance 11 or 28 can be pushed into the receiving device 12 in its longitudinal direction and is held in the receiving state in two receiving bores 46, 47 of the receiving device 12.
  • the blowing lance 11, 28 is oriented at an acute angle to the hot wind flow in the hot wind line 14.
  • the outlet opening 27, 43 of the blowing lance 11, 28 is located approximately in the region of the fluid line of the hot wind flow.
  • a housing part 48 adjoins the contour of the outer wall 13 of the hot wind pipe 14.
  • the housing part 48 has a closing device 49 which automatically closes the receiving bore 46 after the blowing lance 11, 28 has been removed from the receiving device 12.
  • the closing device 49 consists of a lid-like closing part 50, which is guided in a guide groove 51 essentially parallel to the outer wall 13 of the hot wind pipe 14.
  • a compression spring 54 is arranged between a groove base formed as a stop 52 and an end region 53 of the closing part 50 facing the stop 52.
  • the end region of the closing part 50 arranged opposite the end region 53 of the closing part 50 is designed as a closing edge 55.
  • a closing recess 56 designed to correspond to the closing edge 55 is arranged in the housing part 48. 6 shows the closing device 49 in the open state, the closing edge 55 of the closing part 50 being separated from the closing recess 56 by the blowing lance 11, 28.
  • the closing part 50 rests laterally on the blowing lance 11, 28 with spring support. After the blowing lance 11, 28 has been removed from the receiving device 12, the closing part 50 is displaced as a result of the force acting through the compression spring 54 until the closing edge 55 comes into contact with the closing recess 56, as a result of which the receiving bore 46 of the receiving device 12 is closed and any Escaping gases from the hot wind line 14 is prevented.
  • the blowing lance 11, 28 is pushed with its outlet openings 27, 43 against the closing edge 55 of the closing part 50, so that - using the wedge effect, since the closing edge 55 and the longitudinal wall of the blowing lance 11, 28 enclose an acute angle with one another - the closing part 50 is pushed against the action of the compression spring 54 in the direction of the stop 52 and the blowing lance 11, 28 can be brought into a position in the receiving device 12 which is ready for operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)

Abstract

En vue d'éviter des retours de flamme dans une lance d'insufflation de charbon pulvérisé qui émerge dans une conduite de vent chaud d'un haut-fourneau, on effectue un refroidissement au moyen d'un agent réfrigérant pulvérisé. L'eau est utilisée de préférence comme agent réfrigérant. Comme gaz porteur pour l'eau pulvérisée, on utilise soit de l'oxygène gazeux insufflé dans la lance pour la combustion complète du charbon pulvérisé, soit de l'air.
EP92923142A 1991-11-04 1992-11-03 Procede et dispositif de protection d'un systeme d'insufflation monte dans une conduite de vent chaud d'un haut-fourneau Withdrawn EP0565695A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4136274A DE4136274A1 (de) 1991-11-04 1991-11-04 Verfahren und vorrichtung zum schutz einer in einer heisswindleitung eines hochofens angeordneten einblasvorrichtung
DE4136274 1991-11-04

Publications (1)

Publication Number Publication Date
EP0565695A1 true EP0565695A1 (fr) 1993-10-20

Family

ID=6444055

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92923142A Withdrawn EP0565695A1 (fr) 1991-11-04 1992-11-03 Procede et dispositif de protection d'un systeme d'insufflation monte dans une conduite de vent chaud d'un haut-fourneau

Country Status (7)

Country Link
US (1) US5403378A (fr)
EP (1) EP0565695A1 (fr)
AU (1) AU2898292A (fr)
BR (1) BR9205447A (fr)
DE (1) DE4136274A1 (fr)
WO (1) WO1993009254A1 (fr)
ZA (1) ZA928255B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6129756A (en) 1998-03-16 2000-10-10 Teramed, Inc. Biluminal endovascular graft system
US6273909B1 (en) * 1998-10-05 2001-08-14 Teramed Inc. Endovascular graft system
KR100948927B1 (ko) * 2007-08-29 2010-03-23 주식회사 포스코 용철 제조용 풍구 및 이를 이용한 가스 취입 방법
RU2449022C2 (ru) * 2010-06-07 2012-04-27 Открытое акционерное общество "Нижнетагильский металлургический комбинат" (ОАО "НТМК") Способ охлаждения фурмы воздушного дутья и подачи природного газа в доменную печь и устройство для его осуществления
JP5775476B2 (ja) * 2012-03-06 2015-09-09 新日鐵住金株式会社 高炉羽口からの還元性ガス吹き込み方法及び吹き込みランス
DE102018113774A1 (de) * 2018-06-08 2019-12-12 Aktien-Gesellschaft der Dillinger Hüttenwerke Vorrichtung und Verfahren zum Einbringen eines Ersatzreduktionsmittels in einen Hochofen

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE462207C (de) * 1928-07-06 Gaston De Bethune Vorrichtung zum Einfuehren von staub- oder pulverfoermigen Stoffen in die Schmelzzone von Schacht-, insbesondere Hochoefen
US1518854A (en) * 1920-08-06 1924-12-09 Edmund B Kirby Method of operating blast furnaces
FR1280598A (fr) * 1960-06-21 1962-01-08 Pompey Acieries Dispositif d'injection de substances liquides, semi-liquides, pulvérulentes, fluidifiées ou analogues
FR1316711A (fr) * 1961-12-22 1963-02-01 Mobil Oil France Brûleur perfectionné
FR1337262A (fr) * 1962-06-01 1963-09-13 Exxon Standard Sa Procédé et dispositif d'injection de combustible dans les hauts fourneaux
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
LU48010A1 (fr) * 1964-02-24 1965-04-17
DE1232603B (de) * 1964-06-04 1967-01-19 Normandie Ste Metallurgique Verschlussvorrichtung fuer eine OEffnung zum Einfuehren von Brennstoff in eine Heisswind-Blasform eines Hochofens
FR1406013A (fr) * 1964-06-04 1965-07-16 Normandie Ste Metallurgique Obturateur pour orifice d'injection de fuel dans une tuyère de vent chaud d'un haut fourneau
NL6712305A (fr) * 1966-09-12 1968-03-13
DE2114781C3 (de) * 1971-03-26 1974-11-07 Nippon Kokan K.K., Tokio Beheizungsverfahren für Hochöfen und Vorrichtung dafür
US3937449A (en) * 1974-06-26 1976-02-10 United States Steel Corporation Liquid-fuel atomization and injection device
SU532624A1 (ru) * 1975-08-11 1976-10-25 Всесоюзный научно-исследовательский институт металлургической теплотехники Устройство дл ввода форсунок при вдувании мазута в доменную печь
DE2633061C3 (de) * 1975-08-14 1980-02-14 Creusot-Loire, Paris Blasverfahren für öfen mit Schmelzschacht, insbesondere Hochöfen und Blasform zur Durchführung des Verfahrens
FR2328773A2 (fr) * 1975-10-21 1977-05-20 Creusot Loire Methode et tuyere de soufflage d'un haut fourneau
GB8506655D0 (en) * 1985-03-14 1985-04-17 British Steel Corp Smelting shaft furnaces
FR2580296B1 (fr) * 1985-04-15 1987-07-10 Siderurgie Fse Inst Rech Dispositif d'injection de matiere pulverulente, notamment de charbon, dans un haut fourneau
JPS63171818A (ja) * 1987-01-09 1988-07-15 Nkk Corp 酸素高炉の羽口
DE4008963C1 (fr) * 1990-03-20 1991-11-14 Hoesch Stahl Ag, 4600 Dortmund, De
US5018458A (en) * 1990-09-12 1991-05-28 Zimpro Passavant Environmental Systems, Inc. Furnace combustion zone temperature control method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9309254A1 *

Also Published As

Publication number Publication date
US5403378A (en) 1995-04-04
BR9205447A (pt) 1994-07-05
ZA928255B (en) 1993-05-06
DE4136274A1 (de) 1993-05-06
AU2898292A (en) 1993-06-07
WO1993009254A1 (fr) 1993-05-13

Similar Documents

Publication Publication Date Title
EP0279913B1 (fr) Brûleur pour la combustion de combustibles liquides ou gazeux
EP0139085B1 (fr) Procédé et brûleur pour la combustion des combustibles liquides ou gazeux avec diminution de la formation de NOx
DE69922441T2 (de) Kohärenter Überschallgasstrahl zum Zuführen von Gas in eine Flüssigkeit
DE69812544T2 (de) Einblaslanze mit kohärentem Strahl
EP0571704B1 (fr) Brûleur pour combustible pulvérulent
DE60129961T2 (de) Direktschmelzungsverfahren und -vorrichtung
EP0598189A1 (fr) Pulvérisateur pour un brûleur à huile
EP0565695A1 (fr) Procede et dispositif de protection d'un systeme d'insufflation monte dans une conduite de vent chaud d'un haut-fourneau
EP0946848B1 (fr) Procede et dispositif permettant de faire fonctionner un four a cuve
US3920230A (en) Blast furnace fuel injector lance
EP0447908A1 (fr) Procédé et dispositif pour l'injection de charbon pulvérisé dans un haut fourneau
US4389243A (en) Method for the flash oxidation of metal concentrates
DE3310500A1 (de) Brenner zur verbrennung von staubfoermigen brennstoffen und verfahren zum betrieb einer brennstaubbrennerflamme
US4249722A (en) Apparatus for the flash oxidation of metal concentrates
AT408348B (de) Verfahren und vorrichtung zum zuführen eines gases in ein metallurgisches gefäss
AT404399B (de) Verfahren und brenner zum verbrennen insbesondere flüssiger brennstoffe
DE3921807A1 (de) Verfahren und vorrichtung zum beheizen eines metallurgischen ofens
DE102005020664B4 (de) Brenner für flüssige Brennstoffe
AT219633B (de) Verfahren und Vorrichtungen zur Verhüttung von Eisenerzen in der Wirbelschmelzkammer-Feuerung eines Dampferzeugers
DE950592C (de) Muffelfeuerung mit Einblasung des Brennstoff-Luft-Gemisches von der Feuergasausstroemseite her
DE2114781C3 (de) Beheizungsverfahren für Hochöfen und Vorrichtung dafür
DE830541C (de) Brenner fuer Siemens-Martin-OEfen
DE19936935C2 (de) Verfahren und Vorrichtung zur Leistungssteigerung und Brennstoffeinsparung bei der Erzeugung von Roheisen
DE19801426C1 (de) Brennerkopf für eine Blaslanze
DE2702422A1 (de) Verfahren und vorrichtung zum einspritzen von brennstoff in eine blasform

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19930629

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE ES FR GB IT LU NL

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KORTEC AG

17Q First examination report despatched

Effective date: 19950913

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MANNESMANN AKTIENGESELLSCHAFT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19970802