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WO2013023950A1 - Installation de haut fourneau - Google Patents

Installation de haut fourneau Download PDF

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Publication number
WO2013023950A1
WO2013023950A1 PCT/EP2012/065375 EP2012065375W WO2013023950A1 WO 2013023950 A1 WO2013023950 A1 WO 2013023950A1 EP 2012065375 W EP2012065375 W EP 2012065375W WO 2013023950 A1 WO2013023950 A1 WO 2013023950A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
blast furnace
cleaning unit
conduit
uptake
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.)
Ceased
Application number
PCT/EP2012/065375
Other languages
English (en)
Inventor
Guy Thillen
Lionel Hausemer
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of WO2013023950A1 publication Critical patent/WO2013023950A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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 specially adapted for furnaces of these types
    • F27B1/18—Arrangements of dust collectors
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/002—Evacuating and treating of exhaust gases
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/20—Arrangements for treatment or cleaning of waste gases
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/30—Arrangements for extraction or collection of waste gases; Hoods therefor
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
    • C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
    • 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
    • Y02P10/25—Process efficiency

Definitions

  • the present invention generally relates to a blast furnace installation, in particular comprising blast furnace and a gas extraction unit connected to a gas cleaning unit.
  • Blast furnace gas also referred to as top gas
  • top gas is a by-product of blast furnace operation that is generated when the iron ore is reduced with coke to metallic iron.
  • the top gas which is mostly composed of nitrogen, carbon dioxide and carbon monoxide, is commonly used as a fuel within the steel works. It may however also be used in external installations such as boilers and power plants.
  • As the top gas generally has a rather low heating value, it may be mixed with a richer gas, e.g. natural gas or coke oven gas, before combustion.
  • the top gas is generally also fed through a gas cleaning unit before it is used further. In such a conventional gas cleaning unit, particulate matter, such as blast furnace dust, is generally removed from the top gas to provide a cleaner gas for combustion.
  • Top gas however also contains some undesired contaminants, such as recirculating elements such as zinc and alkalis, which may have a negative influence on the blast furnace operation.
  • the introduction of such undesired contaminants into the burden cycle may be unavoidable, such as when the contaminants are naturally found in the charged raw materials.
  • Zn scaffolds can start to build up in the blast furnace wall region.
  • this Zn scaffolding areas are usually in the upper shaft and throat as temperatures are lower in these regions.
  • the collected top gas which contains the Zn vapours, is extracted from the blast furnace and fed through a conventional gas cleaning unit. Most of the Zn will condensate on the surface of the fine particles which can be retrieved from the extracted top gas e.g. in the form of wet scrubber sludge, such sludge thus containing a fair amount of Zn. In a lower extent part of the Zn is found in the dust collected at a primary stage of the conventional gas cleaning unit. .
  • the sludge may however also contain a non-negligible amount of residual iron and it may be of advantage to further use the sludge to extract the remaining iron.
  • the sludge from the wet scrubber is generally considered as an unusable waste product with all its associated problems.
  • a blast furnace installation comprises a blast furnace with a charging system arranged centrally above the furnace shaft and connected at the top of an upper top cone of the furnace for feeding charge material into the furnace, a conventional gas cleaning unit, and lateral top gas extraction uptakes connected between the top cone, laterally with respect to the charging system, and the gas cleaning unit.
  • the blast furnace installation further comprises a central gas uptake conduit having a lower uptake opening arranged in the vicinity of a vertical axis of the blast furnace, in an upper portion of the blast furnace for extracting gas from an axial region of the blast furnace; and an auxiliary gas cleaning unit connected to the central gas uptake conduit for cleaning gas extracted via the central gas uptake conduit.
  • the present invention provides a central gas uptake conduit.
  • the conventional lateral top gas extraction uptakes extract gas from a lateral region of the blast furnace
  • the central gas uptake conduit extracts gas from an axial region of the blast furnace, thus allowing a more selective extraction of gas from the furnace.
  • said auxiliary gas cleaning unit is a gas cleaning unit dedicated to treating zinc or zinc containing components contained in said gas extracted via said central gas uptake conduit.
  • the uptake opening of the central gas uptake conduit is arranged in the top cone or throat region of the blast furnace, preferably at the level of the base of the top cone, that is below the openings of the lateral top gas extraction uptakes.
  • a dedicated gas extraction in the axial region of the blast furnace thus permits the extraction of a gas much richer in Zn than an average top gas through the traditional lateral top gas extraction uptakes would be.
  • the Zn rich gas collected through the central gas uptake conduit is then fed through an auxiliary gas cleaning unit, which is preferably specifically adapted to collect Zn rich dust or sludge.
  • the auxiliary gas cleaning unit is fed with a gas richer in Zn and thus produces dry flue dust or sludge that is also expected to be richer in Zn.
  • Such an "enriched" sludge is a product with an added value as it can easier be exploited in a dedicated recycling unit or sold to a specialized company.
  • the central gas uptake conduit and the auxiliary gas cleaning unit allow the recycling of Zn rich by products at reduced cost when compared to recycling plants with multiple hearth furnaces.
  • the blast furnace is provided with a central gas uptake conduit that is arranged and formed so as to serve as centre material feeding pipe, which is connected to a material hopper and to the auxiliary gas cleaning unit.
  • a centre material feeding pipe is in some blast furnace installations used to feed further charge material, generally coke, into the blast furnace.
  • the existing centre material feeding pipe may be used as central gas uptake conduit and additionally be connected to an auxiliary gas cleaning unit.
  • the blast furnace is provided with a central gas uptake conduit that is arranged and formed within or on a probe reaching into the blast furnace.
  • a probe may e.g. be an above burden probe or an in burden probe.
  • the uptake opening of the central gas uptake conduit may be arranged above the burden level within the blast furnace. Alternatively, it may be arranged below the burden level within the blast furnace.
  • a primary stage of the auxiliary gas cleaning unit may comprise a cyclone for removing gross particles from the extracted gas. It has been found that Zn generally tends to condensate to the finer particles. The gross particles removed from the extracted gas thus generally have low concentration of Zn. Such gross particles may therefore be more easily recycled, e.g. by feeding them back into the blast furnace.
  • a second stage of the auxiliary gas cleaning unit may comprise a dry gas cleaning unit, e.g. an electrobag filter, downstream of the cyclone for removing flue dust from the extracted gas.
  • a dry gas cleaning unit e.g. an electrobag filter
  • electrobag filters As the Zn generally tends to stick to the finer particles, such flue dust would be particularly rich in Zn.
  • electrobag filters has the advantage that the flue dust remains dry and therefore uses less volume than wet sludge would do.
  • the second stage of the auxiliary gas cleaning unit may also comprise a scrubber downstream of the cyclone for removing sludge from the extracted gas.
  • the auxiliary gas cleaning unit may comprise a venturi ejector for the removal of fine particles from the extracted gas.
  • a venturi ejector which comprises the injection of water, allows separating Zn rich dust from the gas by using the phenomenon of different exit velocities of the gas and the water. The fine dust particles are then removed as sludge.
  • the ejector permits to drive the gas back to the blast furnace.
  • the installation further comprises a return conduit between the auxiliary gas cleaning unit and the blast furnace for feeding cleaned gas back into the blast furnace.
  • the cleaned gas which has been stripped of its high Zn content, may thus be fed back into the blast furnace.
  • the cyclone may be connected to the return conduit for feeding back gross particles removed by the cyclone into the return conduit for introduction into the blast furnace. Gross particles, which are poor in Zn may therefore be fed back into the blast furnace and the residual iron therein may be extracted. In this configuration, the gross particles and gas are entrained by a second ejector placed below the cyclone.
  • the installation may further comprise a recirculation conduit between the dry gas cleaning unit and the central gas uptake conduit for feeding flue dust removed by the dry gas cleaning unit back into central gas uptake conduit.
  • Re-circulation of cold flue dust containing fine Zn particles into the central gas uptake conduit upstream of the cyclone, scrubber or dry gas cleaning unit allows for hot Zn extracted from the blast furnace to condensate on the recirculated colder flue dust, thereby increasing further the Zn concentration of the particles.
  • a combustion chamber is arranged in the central gas uptake conduit for heating the extracted gas fed to the auxiliary gas cleaning unit.
  • a combustion chamber allows re- evaporation of the Zn deposited on the bigger particles and a quick oxidation of the Zn to ZnO, which may then be easier to separate as dust in the off-gas. This combustion can also avoid a condensation of the Zn on the inner face of the pipes.
  • zinc this is understood to encompass zinc-containing molecules such as e.g. zinc oxide (ZnO).
  • Fig. 1 is a cross-section through a traditional blast furnace
  • Fig. 2 is a cross-section through a portion of a blast furnace installation with an auxiliary gas cleaning unit according to a first embodiment of the invention
  • Fig. 3 is a cross-section through a portion of a blast furnace installation with an auxiliary gas cleaning unit according to a second embodiment of the invention
  • Fig. 4 is a cross-section through a portion of a blast furnace installation with an auxiliary gas cleaning unit according to a third embodiment of the invention.
  • Fig. 5 is a cross-section through a portion of a blast furnace installation with an auxiliary gas cleaning unit according to a fourth embodiment of the invention.
  • Fig. 6 is a cross-section through a portion of a blast furnace installation with an auxiliary gas cleaning unit according to a fifth embodiment of the invention.
  • Fig. 7 is a cross-section through a portion of a blast furnace installation with an auxiliary gas cleaning unit according to a sixth embodiment of the invention.
  • Fig. 8 is a cross-section through a portion of a blast furnace installation with an auxiliary gas cleaning unit according to a seventh embodiment of the invention.
  • a blast furnace installation comprises a blast furnace 10, as shown in Fig .1 , with a furnace shaft 12, which has in an upper region a furnace top cone 14 through which charge material is fed into the furnace shaft 12. Laterally in the roof 16 of the blast furnace top cone, openings are arranged for the connection of top gas extraction uptakes 18 leading top gas from the blast furnace to a conventional gas cleaning unit (not shown).
  • a charging system 20 is arranged centrally above the furnace shaft 12 for feeding charge material into the blast furnace 10. Due to the central arrangement of the charging installation 20, the top gas extraction uptakes 18 are arranged off-centre in the roof 16 of the blast furnace.
  • the charging system 20 shown in Fig .1 is of the bell-less top type, it should be noted that other installations, such as e.g. two- or three-bell systems, are equally possible and within the scope of the present invention.
  • Fig.2 shows the top cone 14 of a blast furnace with a central gas uptake conduit 22 and an auxiliary gas cleaning unit 24.
  • the central gas uptake conduit 22 has an uptake opening 26 arranged centrally at the base of the top cone 14 on the axis of the blast furnace 10.
  • the central gas uptake conduit 22 is configured as a centre material feeding pipe connected to a material hopper (not shown) for feeding an additional charge material into the blast furnace in addition to the charge material fed from the charging system 20.
  • the central gas uptake conduit 22 is further connected to the auxiliary gas cleaning unit 24, which comprises a cyclone 28 and a dry gas cleaning unit 30 in the form of an electrobag filter. In the cyclone 28, gross particles are removed from the extracted gas via a gross particle exit 32.
  • Such gross particles have low concentration of Zn.
  • flue dust is removed from the extracted gas via dust exit 34.
  • flue dust has high Zn concentration.
  • the remainder of the extracted gas may be fed via feed pipe 36 to another installation (not shown) for further use.
  • Fig.3 shows the top cone 14 of a blast furnace with a central gas uptake conduit 22 and another auxiliary gas cleaning unit 24.
  • the auxiliary gas cleaning unit 24 of Fig.3 comprises a scrubber 38 for removing sludge from the extracted gas via sludge exit 40.
  • Such sludge has high Zn concentration.
  • Fig.4 shows the top cone 14 of a blast furnace with a central gas uptake conduit 22 and another auxiliary gas cleaning unit 24.
  • the auxiliary gas cleaning unit 24 of Fig.4 comprises a venturi ejector 42 for removing sludge from the extracted gas via sludge exit 44. Such sludge has high Zn concentration.
  • the auxiliary gas cleaning unit 24 of Fig.4 further shows a return conduit 46 for feeding cleaned gas back into the throat 14 of the blast furnace.
  • Fig.5 shows the top cone 14 of a blast furnace with a central gas uptake conduit 22 and another auxiliary gas cleaning unit 24.
  • the auxiliary gas cleaning unit 24 of Fig.5 comprises a cyclone 28 for removing gross particles from the extracted gas via the gross particle exit 32 and a venturi ejector 42 for removing sludge from the extracted gas via sludge exit 44. Furthermore, this auxiliary gas cleaning unit 24 also comprises a return conduit 46 for feeding cleaned gas back into the throat 14 of the blast furnace.
  • the gross particle exit 32 is connected to the return conduit 46 and feeds gross particles having low Zn concentration into the cleaned gas, which is fed back into the throat 14 of the blast furnace.
  • a further venturi ejector 48 is provided in the return conduit 46 for entraining the gross particles.
  • Fig.6 shows the top cone 14 of a blast furnace with a central gas uptake conduit 22 and another auxiliary gas cleaning unit 24.
  • the auxiliary gas cleaning unit 24 of Fig.6 comprises a cyclone 28 for removing gross particles from the extracted gas via a gross particle exit 32 and a dry gas cleaning unit 30 for removing flue dust from the extracted gas via dust exit 34.
  • a recirculation conduit 50 is connected between the dust exit 34 and the central gas uptake conduit 22 for feeding the removed flue dust, which is high in Zn concentration, into the central gas uptake conduit 22 upstream of the cyclone 28. The flue dust is thereby further coated with Zn and forms bigger dust particles.
  • Fig.7 shows the top cone 14 of a blast furnace with another central gas uptake conduit 22 and an auxiliary gas cleaning unit 24.
  • the central gas uptake conduit 22 of Fig.7 is formed within an above burden probe 52 and has its uptake opening 26 arranged centrally in the furnace throat 14 in the vicinity of the axis of the blast furnace 10.
  • the central gas uptake conduit 22 is connected to an auxiliary gas cleaning unit 24 as shown in Fig.3.
  • Fig.8 shows the top cone 14 of a blast furnace with a central gas uptake conduit 22 and an auxiliary gas cleaning unit 24 as generally shown in Fig.2.
  • a combustion chamber 54 is provided in the central gas uptake conduit 22.
  • Such a combustion chamber 54 is arranged for heating the extracted gas, thereby allowing oxidation of the Zn to ZnO, which is easier to separate.
  • central gas uptake conduit 48 further venturi ejector

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

La présente invention concerne une installation de haut fourneau comprenant un haut fourneau (10), une unité de nettoyage des gaz et des tubes d'extraction des gaz supérieurs latéraux raccordés entre un cône supérieur (14) du haut fourneau (10) et l'unité de nettoyage des gaz. Selon un aspect de la présente invention, l'installation de haut fourneau comprend en outre un conduit de montée des gaz central (22), une ouverture de montée des gaz (26) étant disposée à proximité d'un axe vertical du haut fourneau dans une partie supérieure du haut fourneau (10) pour extraire les gaz d'une région axiale du haut fourneau (10) ; et une unité de nettoyage des gaz auxiliaire (24) raccordée au conduit de montée des gaz central (22) pour nettoyer les gaz extraits via le conduit de montée des gaz central (22).
PCT/EP2012/065375 2011-08-18 2012-08-06 Installation de haut fourneau Ceased WO2013023950A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU91855A LU91855B1 (en) 2011-08-18 2011-08-18 Blast furnace installation
LU91855 2011-08-18

Publications (1)

Publication Number Publication Date
WO2013023950A1 true WO2013023950A1 (fr) 2013-02-21

Family

ID=46727181

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/065375 Ceased WO2013023950A1 (fr) 2011-08-18 2012-08-06 Installation de haut fourneau

Country Status (3)

Country Link
LU (1) LU91855B1 (fr)
TW (1) TW201314137A (fr)
WO (1) WO2013023950A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU92150B1 (en) * 2013-02-15 2014-08-18 Wurth Paul Sa Process for charging a burden with a high zinc content in a blast furnace installation
CN104132553A (zh) * 2014-07-31 2014-11-05 广西北流仲礼瓷业有限公司 一种窑炉余热利用系统
CN109022650A (zh) * 2018-09-29 2018-12-18 武汉钢铁有限公司 一种高炉上部煤气流分布的识别方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944909A (fr) * 1972-09-05 1974-04-27
US4152123A (en) * 1977-12-16 1979-05-01 Gottfried Bischoff Bau Kompl. Gasreinigungs- Und Wasserruckkuhlanlagen Gmbh & Co. Kommanditgesellschaft Gas-cleaning apparatus and method for high-pressure blast furnace
DD299917A7 (de) * 1988-04-13 1992-05-14 Ingitec-Buerogemeinschaft Fuer Giessereitechnik,De Koksloser, gasgefeuerter kupolofen
DE4324699A1 (de) * 1993-07-23 1995-01-26 Hans Ulrich Dipl Ing Feustel Verfahren und Einrichtung zur vollständigen Nachverbrennung von Prozeßgasen in einem koksbeheizten Schachtofen
KR20010064156A (ko) * 1999-12-24 2001-07-09 이구택 고로 노정상승관의 코크스 포집장치
JP2002115827A (ja) * 2000-10-06 2002-04-19 Nippon Steel Corp 廃棄物溶融炉
EP1797207A1 (fr) 2004-10-05 2007-06-20 Paul Wurth S.A. Traitement de boues d'usines sidérurgiques dans un four à étages

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944909A (fr) * 1972-09-05 1974-04-27
US4152123A (en) * 1977-12-16 1979-05-01 Gottfried Bischoff Bau Kompl. Gasreinigungs- Und Wasserruckkuhlanlagen Gmbh & Co. Kommanditgesellschaft Gas-cleaning apparatus and method for high-pressure blast furnace
DD299917A7 (de) * 1988-04-13 1992-05-14 Ingitec-Buerogemeinschaft Fuer Giessereitechnik,De Koksloser, gasgefeuerter kupolofen
DE4324699A1 (de) * 1993-07-23 1995-01-26 Hans Ulrich Dipl Ing Feustel Verfahren und Einrichtung zur vollständigen Nachverbrennung von Prozeßgasen in einem koksbeheizten Schachtofen
KR20010064156A (ko) * 1999-12-24 2001-07-09 이구택 고로 노정상승관의 코크스 포집장치
JP2002115827A (ja) * 2000-10-06 2002-04-19 Nippon Steel Corp 廃棄物溶融炉
EP1797207A1 (fr) 2004-10-05 2007-06-20 Paul Wurth S.A. Traitement de boues d'usines sidérurgiques dans un four à étages

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
THEODOR W NIESS ET AL: "The Bischoff top gas process for relined blast furnaces", IRON AND STEEL ENGINEER,, vol. 61, no. 1, 1 January 1984 (1984-01-01), pages 47 - 52, XP001409344 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU92150B1 (en) * 2013-02-15 2014-08-18 Wurth Paul Sa Process for charging a burden with a high zinc content in a blast furnace installation
WO2014125057A1 (fr) * 2013-02-15 2014-08-21 Paul Wurth S.A. Procédé pour charger un lit de fusion à haute teneur en zinc dans une installation de haut fourneau
CN104132553A (zh) * 2014-07-31 2014-11-05 广西北流仲礼瓷业有限公司 一种窑炉余热利用系统
CN109022650A (zh) * 2018-09-29 2018-12-18 武汉钢铁有限公司 一种高炉上部煤气流分布的识别方法

Also Published As

Publication number Publication date
LU91855B1 (en) 2013-02-19
TW201314137A (zh) 2013-04-01

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