US20070137436A1 - Method for the thermal treatment of raw materials and a device for carrying out said method - Google Patents

Method for the thermal treatment of raw materials and a device for carrying out said method Download PDF

Info

Publication number
US20070137436A1
US20070137436A1 US10/474,898 US47489802A US2007137436A1 US 20070137436 A1 US20070137436 A1 US 20070137436A1 US 47489802 A US47489802 A US 47489802A US 2007137436 A1 US2007137436 A1 US 2007137436A1
Authority
US
United States
Prior art keywords
furnace
gas phases
gas
raw materials
gas phase
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.)
Abandoned
Application number
US10/474,898
Other languages
English (en)
Inventor
Lothar Loffler
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.)
ThyssenKrupp AT PRO Tec GmbH
Original Assignee
ThyssenKrupp AT PRO Tec GmbH
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 ThyssenKrupp AT PRO Tec GmbH filed Critical ThyssenKrupp AT PRO Tec GmbH
Assigned to AT.PRO TEC TECHNOLOGIE-TEAM GMBH reassignment AT.PRO TEC TECHNOLOGIE-TEAM GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LOFFLER, LOTHAR
Publication of US20070137436A1 publication Critical patent/US20070137436A1/en
Assigned to THYSSENKRUPP AT.PRO TEC GMBH reassignment THYSSENKRUPP AT.PRO TEC GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: AT.PRO TEC TECHNOLOGIE-TEAM GMBH
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/16—Arrangements of tuyeres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]

Definitions

  • the present invention relates to a method for the thermal treatment of raw materials and to a device for carrying out this method for the thermal treatment of raw materials.
  • shaft furnaces employing prior art technology have a great variety of industrial uses.
  • shaft furnaces can be used as melting units (e.g., blast furnaces, cupola furnaces) or for the heat treatment of a charge (e.g., lime kilns, calcining kilns for bauxite).
  • One method for operating a cupola furnace is known, for example, from DE 41 22 381 A1.
  • the cupola furnace is loaded at the top with the charge, a mixture of lumpy raw materials such as, for example, ore, scrap, coke charge, and fluxing materials.
  • blast air
  • the coke is oxidized to CO 2 and CO and thus produces the energy needed for melting.
  • the air is conveyed into the furnace via tuyées, which are uniformly distributed in an annular plane on the circumference of the furnace.
  • the molten pig iron is collected in the lower zone of the furnace, in what is called the hearth or hearth zone, and flows out continuously through a siphon system.
  • Oxygen is added to the cold or hot blast in contemporary methods in order to increase the melting capacity and improve the metallurgical properties of the pig iron.
  • Various advantages are achieved by the addition of oxygen. These include, among others, an increase in the temperature of the melting zone and a concomitant increase in melting capacity. Furthermore, higher pig iron temperatures are obtained, the coke charge burns more thoroughly (free residual coke can be found in the slag in the case of incomplete combustion), and less coke is therefore consumed.
  • oxygen it must be noted that the pressure of the oxygen decreases within a short distance beyond the inlet with the result that a deeper penetration of the charge is not possible. Rather, a sharp temperature gradient occurs between the interior of the charge and the portion of the charge adjacent to the inlet.
  • DE 197 29 624 A1 proposes that the oxygen be introduced in high-pressure pulses into the furnace by means of a lance disposed in the tuyère.
  • the oxygen should penetrate the charge more deeply and thus eliminate the temperature gradient within the charge.
  • the known method does indeed allow a deeper penetration of the charge, but the results remain unsatisfactory.
  • the large increase in the local reaction temperature in the vicinity of the O 2 inlet causes a superproportional, exponential increase in reaction rates.
  • known formulas e.g., the Arrhenius' equation
  • the object of the present invention is to provide a method for the thermal treatment of raw materials that ensures the best possible penetration of the furnace charge and that avoids localized overheating within the charge.
  • An additional goal is to introduce a device for carrying out the inventive method.
  • a furnace such as a blast furnace, is used in the inventive method for the thermal treatment of raw materials.
  • the raw materials are understood to be, for example, ore, scrap, coke charge, fluxing materials, etc.
  • the furnace is charged with the raw materials and at least two gas phases are introduced into the furnace.
  • the gas phases have different oxygen contents, and even an oxygen-free gas phase is permissible.
  • the at least two gas phases are alternately introduced into the furnace.
  • alternating introduction is understood to mean that for a certain period of time only one of the gas phases is introduced, without the gas phases having been mixed in advanced, and that the gas phases can be alternately introduced in any sequence. It is possible in principle to introduce the gas phases with different oxygen contents by turns in a continuous volume flow or discontinuously, i.e., for a certain period of time neither the one nor the other gas phase is supplied.
  • the sequencing of high oxygen content gas phases with low oxygen content gas phases has the advantage that a “priming charge” occurs with the high-oxygen gas phase at exponentially increased reaction rates and material conversions (especially in the gas-solid reaction with the coke charge), while the atmospheres and temperatures are equalized by the low-oxygen gas phase at high flow rates and thus good removal of the gaseous reaction products.
  • the inventive method allows good penetration of the furnace charge and avoids localized overheating within the charge.
  • a high oxygen content gas phase for example, pure oxygen
  • a low oxygen content gas phase for example, compressed air
  • the injections of oxygen and compressed air can overlap each other, follow one another immediately, or be separated by a time delay.
  • the method has the advantage that use of an oxygen-enriched air feed avoids the hindrance of coke oxidation by a “nitrogen” ballast.
  • an oxygen-enriched air feed avoids the hindrance of coke oxidation by a “nitrogen” ballast.
  • the local atmosphere is diluted and partially cooled with the result that the reaction equilibria are re-established.
  • the equalization of the concentrations and temperatures through turbulence and diffusion owing to the batchwise introduction of oxygen and air accrues distinct advantages with regard to the execution of the reactions.
  • the charge serves as an internal mixing apparatus for the production of enriched air. Mixing can be rapidly adapted to the process by varying the different cycle lengths, with the result that fluctuations in the melt can be minimized.
  • the at least two gas phases undergoing alternating introduction into the furnace are introduced into the furnace under a pressure that is greater than the internal pressure of the furnace. This greater pressure achieves a deeper penetration of the furnace charge, on the one hand, while, on the other hand, minimizing the influence of the wall effect in this zone. This can substantially improve the technical combustion efficiency and the metallurgical results.
  • the at least two gas phases are introduced into the furnace in a continuous volume flow. Accordingly, there is no interruption between the introductions of the different gas phases, and as a result the gas phases immediately following one another drive each other and thus promote constant flow conditions. This results in good penetration of the charge.
  • one of the two gas phases in a preferred embodiment of the method is a mixture of an inert gas and oxygen.
  • the inert gas is preferably N 2 and/or CO 2 and/or Ar.
  • One of the at least two gas phases is air in an advantageous embodiment of the inventive method.
  • One of the at least two gas phases is oxygen in another advantageous embodiment of the inventive method.
  • the proportions of the oxygen quantities introduced into the furnace with the at least two gas phases are regulated in order to establish a certain atmosphere in the furnace. This enables short-term and very sensitive responses to changes in the operating parameters.
  • the duration of introduction of the individual gas phases into the furnace is varied in order to adjust the quantities of oxygen delivered into the furnace with the at least two gas phases.
  • the proportions of the oxygen quantities introduced into the furnace with the two gas phases can be regulated in order to ensure that the atmosphere inside the furnace is always optimal.
  • the inventive furnace for the thermal treatment of raw materials has a chamber with a charging opening for the raw materials.
  • This furnace is also provided with an injection apparatus for introducing the at least two gas phases with different oxygen contents into the chamber.
  • the injection apparatus is designed in such a way that the at least two gas phases are introduced by turns into the furnace.
  • the injection apparatus for delivering the gas phases has gas phase conduits equipped with control valves.
  • Gas phase conduit is understood to mean any mode of delivery by which the gas phases are conveyed.
  • the gas phases are introduced in sequences that can be arbitrarily varied in terms of length, the time interval between injections, and the relationship of the two gas phases to each other.
  • the introduction can be regulated by means of stored-program control (SPC), e.g., with a microprocessor.
  • SPC stored-program control
  • the aforementioned parameters can be programmed variably and freely, and thus the inflow of the gas phases through the valves can be controlled.
  • pressure regulators are provided for adjusting the gas pressure in the gas phase conduits.
  • the furnace can be equipped with an analyzing device for analyzing the atmosphere in the furnace and/or a measuring device for measuring the temperature in the material discharged from the furnace.
  • the inventive furnace is provided with one or more bustle pipes arranged around the furnace.
  • the supply lances are connected to these bustle pipes.
  • FIG. 1 a cutaway side view of a first embodiment of the inventive furnace
  • FIG. 2 a cutaway side view of a second and third embodiment of the inventive furnace.
  • FIG. 1 shows a furnace 2 , which in the embodiment under discussion is devised as a cupola furnace.
  • This cupola furnace serves to melt pig iron continuously.
  • the furnace 2 has a furnace housing 4 that encloses a chamber 6 .
  • the chamber 6 has several zones in which various processes are carried out, namely, a charging zone 8 , a preheating zone 10 , a melting zone 12 , a so-called blast zone 14 , and a hearth zone 16 , with the last being situated directly above the furnace floor 18 .
  • the furnace housing 4 has, at the charging zone, a lateral charging opening 20 , which can also be situated above the charging zone 8 .
  • the charging opening is designed such that the raw materials to be treated (not shown), e.g., a mixture of pig iron, scrap, coke, lime, alloying constituents, and other fluxing materials, can be delivered to the chamber 6 through the opening.
  • the furnace housing in the charging zone has a vent 22 through which the resulting blast-furnace gas can be conducted away.
  • the shaft furnace 2 has a slag taphole 24 and an iron taphole 26 .
  • the furnace 2 also has a first bustle pipe 28 , which surrounds the furnace housing 4 in annular fashion and is supplied with air via an air-supply device that is not shown.
  • Uniformly distributed around the furnace 2 are a plurality of tubular tuyommes 30 , which on the one side are connected to the first bustle pipe 28 and on the other side lead into the chamber 6 at the blast zone 14 .
  • the depicted first embodiment of the furnace 2 is also equipped with a second bustle pipe 32 , which surrounds the furnace housing in annular fashion.
  • each of the gas phase supply lances 34 is disposed substantially coaxially in a tuy Guatemala 30 such that the end 36 of the gas phase supply lance 34 is situated in the center of the mouth of the tuyées 30 in the region of the chamber 6 .
  • a first conduit 42 for delivering a first gas phase and a second conduit 44 for delivering a second gas phase flow into a common gas phase conduit 38 , to which the second bustle pipe 32 is connected.
  • a first blast-pressure tank 46 is connected to the first gas phase conduit 24 [sic]
  • a second blast-pressure tank 48 is connected to the second gas phase conduit 42 [sic].
  • the blast-pressure tanks contain pressurized gas phases with different oxygen contents, and the pressure within the blast-pressure tanks 46 and 48 is higher than the pressure in the blast zone 14 of the chamber 6 of the furnace 2 .
  • the gas phase conduits 42 and 44 deliver pure oxygen (O 2 ) to the first blast-pressure tank 46 and air to the second blast-pressure tank 48 .
  • the blast-pressure tanks 46 and 48 are not absolutely necessary but serve only as vibration dampers.
  • a first pressure regulator 50 is placed upstream from the first blast-pressure tank 46 and a first control valve 52 is placed downstream from the blast-pressure tank 46
  • a second pressure regulator 54 is placed upstream from the second blast-pressure tank 48 and a second control valve 56 is placed downstream from the blast-pressure tank.
  • the furnace has a control unit 40 that is connected via control circuits 60 to the first and second pressure regulators 50 and 54 and to the first and second control valves 52 and 56 .
  • the control unit 40 controls the control valves in such a manner that the common gas phase conduit 38 and the first gas phase conduit 42 communicate with each other while the second gas phase conduit 44 is closed off, or the common gas phase conduit 38 and the second gas phase conduit 44 communicate with each other while the first gas phase conduit 42 is closed off.
  • the control unit adjusts the pressure in the blast-pressure tanks by means of the pressure regulators 50 and 54 .
  • the chamber 6 of the furnace 2 is charged through the charging opening 20 with the raw materials (not shown) which are to be thermally treated, wherein the raw materials in the chamber 6 constitute the so-called charge.
  • the raw materials are a mixture of pig iron, scrap, coke, lime, alloying constituents, and other fluxing materials.
  • the continuously supplied raw materials pass through the various zones of the chamber 6 successively from top to bottom.
  • the raw materials agglomerate in the charging zone 8 .
  • the preheating zone 10 the raw materials are preheated by the heat and reaction gases rising from the underlying zones
  • the preheated raw materials then pass into the melting zone 12 , in which the raw materials begin to melt due to the high temperatures.
  • the partially melted raw materials next pass into the blast zone 14 .
  • air is blown through the first bustle pipe 28 and the tuy insomnias 30 into the chamber 6 .
  • the air needed for combustion is blown into the blast zone 14 as unheated cold blast or as hot blast.
  • the raw materials are completely melted in the blast zone 14 by the air thus supplied, and the melt passes into the hearth zone 16 , in which, on the one side, the slag floating on the melt is carried off through the first opening 24 and, on the other side, the melt is led away through the second opening 26 .
  • At least two gas phases with different oxygen contents are alternately introduced into the blast zone 14 of the chamber 6 of the inventive furnace 2 .
  • the gas phases are introduced in the process via the first and second gas phase conduits 42 and 44 , the common gas phase conduit 38 , and the gas phase supply lances 34 .
  • the continual alternation between the gas phases thus supplied is controlled by the control unit 54 by means of the control valves 52 and 56 such that the pressurized oxygen-rich gas phase (O 2 ) and the pressurized oxygen-poor gas phase (air) are introduced sequentially into the blast zone 14 .
  • control unit 54 The times during which the control valves are open or closed can be changed by the control unit 54 . Furthermore, the pressure of each gas phase can be changed by the pressure regulators 50 and 54 , respectively. To establish a certain atmosphere in the furnace, the proportions of the oxygen quantities introduced into the furnace with the two gas phases are regulated, and to adjust the oxygen quantities the duration of gas phase introduction is changed.
  • the gas phase supply lances 3 [sic] are suitably arranged within the tuyommes 30 (preferably in concentric fashion), as shown in FIG. 1 .
  • the gas phase supply lances 34 can be situated above the tuyommes so that the gas phases are introduced above the blast, as shown in FIG. 2 .
  • Other arrangements of the gas phase supply lances 34 are also possible.
  • the angle of inclination of the gas phase supply lances 34 with respect to the furnace axis or their depth of immersion into the chamber 6 of the furnace 2 can be varied.
  • FIG. 2 /left and FIG. 2 /right, respectively, show second and third embodiments of the inventive furnace 2 .
  • the second embodiment differs from the first embodiment in that the former does not have a second bustle pipe 32 .
  • the inventive furnace 2 has several segmented bustle pipes 70 , of which only one is shown, and which are arranged in annular fashion around the furnace 2 . There is preferably a total of four circumferentially distributed segmented bustle pipes.
  • the segmented bustle pipes are connected to a first gas phase conduit 38 and have gas phase supply lances 34 that open into the chamber 6 of the furnace 2 .
  • the gas phases can be admitted to each segmented bustle pipe 70 independently of the others.
  • the gas phases are preferably admitted to the pipes 70 in sequence so that the gas phases are introduced clockwise or counterclockwise from each side into the furnace. Refer to the description of FIG. 1 for the other parts of the furnace.
  • the third embodiment differs from the first embodiment in that the former has separate gas phase supply lances 34 having one or two valves 72 each, such that each gas phase supply lance 34 has its own gas phase supply.
  • a stored-program control (SPC) system for example, can be employed in this case, wherein valve disturbances or control errors can be detected with feedback sensors for pressure or flow, for example, and eliminated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
US10/474,898 2001-04-10 2002-04-09 Method for the thermal treatment of raw materials and a device for carrying out said method Abandoned US20070137436A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10117962.6 2001-04-10
DE10117962A DE10117962B4 (de) 2001-04-10 2001-04-10 Verfahren zur thermischen Behandlung von Rohmaterialien und zur Durchführung des Verfahrens
PCT/EP2002/003918 WO2002097347A1 (fr) 2001-04-10 2002-04-09 Procede de traitement thermique de matieres premieres et dispositif pour la mise en oeuvre dudit procede

Publications (1)

Publication Number Publication Date
US20070137436A1 true US20070137436A1 (en) 2007-06-21

Family

ID=7681146

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/474,898 Abandoned US20070137436A1 (en) 2001-04-10 2002-04-09 Method for the thermal treatment of raw materials and a device for carrying out said method

Country Status (7)

Country Link
US (1) US20070137436A1 (fr)
EP (1) EP1379824B1 (fr)
AT (1) ATE331925T1 (fr)
DE (2) DE10117962B4 (fr)
ES (1) ES2266525T3 (fr)
PT (1) PT1379824E (fr)
WO (1) WO2002097347A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080277843A1 (en) * 2005-11-10 2008-11-13 L'air Liquide Societe Anonyme Pour L'etude Et L'ex Method for Supersonically Injecting Oxygen into a Furnace
WO2010076211A1 (fr) * 2009-01-05 2010-07-08 Paul Wurth Refractory & Engineering Gmbh Agencement de conduite circulaire
WO2010076210A1 (fr) * 2009-01-05 2010-07-08 Paul Wurth Refractory & Engineering Gmbh Agencement de conduite circulaire
JP2010531390A (ja) * 2007-06-26 2010-09-24 ティッセンクルップ アーテー プロテック ゲーエムベーハー シャフト炉および炉を操作する方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012103996B4 (de) 2011-06-01 2017-04-20 Krytem - Kryotechnische + medizinische Systeme GmbH Verfahren und Vorrichtung zum Betreiben eines Schachtofens sowie Ventil zur Einleitung in einen Schachtofen
DE102014102913A1 (de) 2014-03-05 2015-09-10 Thyssenkrupp Ag Verfahren zum Betreiben eines Schachtofens, insbesondere eines Hochofens
DE102019135200A1 (de) 2019-12-19 2021-06-24 SMB Rohrleitungsbau Wildau GmbH & Co. KG Rohr, Reaktor und Verfahren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1778524A (en) * 1929-02-11 1930-10-14 Votaw S Durbin Cupola furnace and method of operating the same
US2354997A (en) * 1943-06-25 1944-08-01 Brown Instr Co Control system
US4045212A (en) * 1976-02-17 1977-08-30 General Motors Corporation Method of operation of a cupola
US4138098A (en) * 1975-08-14 1979-02-06 Creusot-Loire Method of blowing smelting shaft furnaces and tuyeres used for said blowing

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE459339C (de) * 1925-12-25 1928-05-02 Carl Rein Windfuehrung bei Kupoloefen mit mehreren Duesenreihen
DE851412C (de) * 1949-03-22 1952-10-06 Heinrich Dr Koppenberg Verfahren fuer die Durchfuehrung metallurgischer Reaktionen in einem Schachtofen
DE4122381A1 (de) * 1991-07-05 1993-01-07 Linde Ag Verfahren zum betreiben eines kupolofens
DE29711593U1 (de) 1997-07-02 1997-09-04 Westfalen AG, 48155 Münster Vorrichtung zur thermischen Behandlung eines Rohmaterials
GB2338961A (en) * 1998-06-29 2000-01-12 Unitika Ltd Electrolytic production of ultrafine metal compound particles
DE19939305A1 (de) * 1999-08-19 2001-02-22 Linde Ag Verfahren zum Betreiben eines Schachtofens
DE19954556A1 (de) * 1999-11-12 2001-05-23 Messer Griesheim Gmbh Verfahren zum Betreiben eines Schmelzofens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1778524A (en) * 1929-02-11 1930-10-14 Votaw S Durbin Cupola furnace and method of operating the same
US2354997A (en) * 1943-06-25 1944-08-01 Brown Instr Co Control system
US4138098A (en) * 1975-08-14 1979-02-06 Creusot-Loire Method of blowing smelting shaft furnaces and tuyeres used for said blowing
US4045212A (en) * 1976-02-17 1977-08-30 General Motors Corporation Method of operation of a cupola

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8317897B2 (en) 2005-11-10 2012-11-27 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for supersonically injecting oxygen into a furnace
US20080277843A1 (en) * 2005-11-10 2008-11-13 L'air Liquide Societe Anonyme Pour L'etude Et L'ex Method for Supersonically Injecting Oxygen into a Furnace
US20100251855A1 (en) * 2007-06-26 2010-10-07 Thyssenkrupp At.Pro Tec Gmbh Shaft furnace and method for operating a furnace
US8309016B2 (en) 2007-06-26 2012-11-13 Thyssenkrupp At.Pro Tec Gmbh Shaft furnace and method for operating a furnace
AU2008267846B2 (en) * 2007-06-26 2012-01-19 Thyssenkrupp At.Pro Tec Gmbh Shaft furnace and method for operating a furnace
JP2010531390A (ja) * 2007-06-26 2010-09-24 ティッセンクルップ アーテー プロテック ゲーエムベーハー シャフト炉および炉を操作する方法
CN102272545A (zh) * 2009-01-05 2011-12-07 保尔伍斯耐火材料与工程有限责任公司 环管装置
WO2010076211A1 (fr) * 2009-01-05 2010-07-08 Paul Wurth Refractory & Engineering Gmbh Agencement de conduite circulaire
US20110272868A1 (en) * 2009-01-05 2011-11-10 Paul Wurth Refractory & Engineering Gmbh Bustle pipe arrangement
KR20110126597A (ko) * 2009-01-05 2011-11-23 풀 부르스 에스.에이. 버슬 파이프 배열
EP2208953A1 (fr) * 2009-01-05 2010-07-21 Paul Wurth Refractory & Engineering GmbH Arrangement de conduite circulaire
EP2208952A1 (fr) * 2009-01-05 2010-07-21 Paul Wurth Refractory & Engineering GmbH Arrangement de conduite circulaire
WO2010076210A1 (fr) * 2009-01-05 2010-07-08 Paul Wurth Refractory & Engineering Gmbh Agencement de conduite circulaire
US20110253017A1 (en) * 2009-01-05 2011-10-20 Paul Wurth S.A. Bustle pipe arrangement
US8808616B2 (en) * 2009-01-05 2014-08-19 Paul Wurth Refractory & Engineering Gmbh Bustle pipe arrangement
AU2009334940B2 (en) * 2009-01-05 2014-09-18 Paul Wurth Refractory & Engineering Gmbh Bustle pipe arrangement
US9028743B2 (en) * 2009-01-05 2015-05-12 Paul Wurth Refractory & Engineering Gmbh Bustle pipe arrangement
AU2009334939B2 (en) * 2009-01-05 2015-09-10 Paul Wurth Refractory & Engineering Gmbh Bustle pipe arrangement
TWI509075B (zh) * 2009-01-05 2015-11-21 保爾伍斯股份有限公司 豎爐的環管裝置
KR101642304B1 (ko) 2009-01-05 2016-07-29 풀 부르스 리프랙토리 앤드 엔지니어링 게엠베하 버슬 파이프 배열

Also Published As

Publication number Publication date
ES2266525T3 (es) 2007-03-01
EP1379824B1 (fr) 2006-06-28
EP1379824A1 (fr) 2004-01-14
ATE331925T1 (de) 2006-07-15
WO2002097347A1 (fr) 2002-12-05
DE50207382D1 (de) 2006-08-10
DE10117962A1 (de) 2002-10-24
DE10117962B4 (de) 2006-12-07
PT1379824E (pt) 2006-09-29

Similar Documents

Publication Publication Date Title
US4642047A (en) Method and apparatus for flame generation and utilization of the combustion products for heating, melting and refining
US20210364237A1 (en) Methods for Preheating Metal-Containing Pellets
AU2009295258B2 (en) A material supply apparatus and process
EP0219824A1 (fr) Méthode et installation de préchauffage de la charge au cours de la préparation en continu d'acier
US20070137436A1 (en) Method for the thermal treatment of raw materials and a device for carrying out said method
NO134779B (fr)
WO2007121530A1 (fr) Installation de fusion directe avec unité de récupération de chaleur perdue
EP3924524B1 (fr) Système de réduction directe et procédé associé
EP3543634B1 (fr) Brûleur oxyfuel pour la fusion d'un matériau granulé
US20050155457A1 (en) Method and device for the continuous production of steel using metal charge material
JPS5811710A (ja) 鋼精錬方法の改良
US5946340A (en) Process for melting of metal materials in a shaft furnace
US5246482A (en) Molten metal producing and refining method
US4414026A (en) Method for the production of ferrochromium
CN1067108C (zh) 金属还原和熔化方法及预热设备
US5069715A (en) Direct smelting process and apparatus
EP0534020B1 (fr) Procédé de production et d'affinage de métaux fondus
US20210301358A1 (en) Methods and systems for increasing the carbon content of direct reduced iron in a reduction furnace
US6146440A (en) Process for the direct production of cast iron from iron bearing ore, and an apparatus suitable to carry out said process
US4996694A (en) Method and apparatus for melting iron and steel scrap
AU2005215826B2 (en) Direct smelting plant and process
RU2820584C1 (ru) Фурма верхней продувки для конвертера, способ добавки вспомогательного сырья и способ рафинирования жидкого чугуна
TWI830137B (zh) 轉爐之頂吹噴槍、副原料添加方法及熔鐵之精煉方法
RU2216597C1 (ru) Способ задувки доменной печи
RU2319749C2 (ru) Способ прямого получения железа, в частности стали, и установка для его осуществления

Legal Events

Date Code Title Description
AS Assignment

Owner name: AT.PRO TEC TECHNOLOGIE-TEAM GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LOFFLER, LOTHAR;REEL/FRAME:018841/0219

Effective date: 20031126

AS Assignment

Owner name: THYSSENKRUPP AT.PRO TEC GMBH, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:AT.PRO TEC TECHNOLOGIE-TEAM GMBH;REEL/FRAME:023790/0930

Effective date: 20061107

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION