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WO2000030989A1 - Procede de pulverisation et de granulation de scories - Google Patents

Procede de pulverisation et de granulation de scories Download PDF

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Publication number
WO2000030989A1
WO2000030989A1 PCT/AT1999/000275 AT9900275W WO0030989A1 WO 2000030989 A1 WO2000030989 A1 WO 2000030989A1 AT 9900275 W AT9900275 W AT 9900275W WO 0030989 A1 WO0030989 A1 WO 0030989A1
Authority
WO
WIPO (PCT)
Prior art keywords
steam
slag
temperatures
granulating
chamber
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/AT1999/000275
Other languages
German (de)
English (en)
Inventor
Alfred Edlinger
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.)
Holcim Ltd
Original Assignee
Holderbank Financiere Glarus 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 Holderbank Financiere Glarus AG filed Critical Holderbank Financiere Glarus AG
Priority to AU13652/00A priority Critical patent/AU1365200A/en
Publication of WO2000030989A1 publication Critical patent/WO2000030989A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
    • C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
    • C01B3/344—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using non-catalytic solid particles
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/066—Receptacle features where the slag is treated
    • C21B2400/074—Tower structures for cooling, being confined but not sealed
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
    • 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 invention relates to a method for comminuting and granulating slag, in which liquid slag is ejected with steam into a granulation chamber and cooled.
  • the resulting kinetic energy was used to break up the jet and shred the slag, with the result that the cooling could be improved and accelerated by additional injection of pressurized water.
  • pressurized water and steam large amounts of steam are required to generate the required kinetic energy. These amounts of steam can be circulated, although relatively high losses must be expected. As a rule, the steam was condensed after granulating the slag and evaporated again.
  • the process according to the invention essentially consists in that superheated steam at temperatures of over 1000 ° C. is blown into the liquid slag near the slag outlet opening and that the cooling in the subsequent pelletizing chamber by endothermic conversion of the superheated steam with hydrocarbons introduced into the pelletizing chamber is carried out with the formation of CO and H2. Because superheated steam with extremely high temperatures is used in deviation from all previously known proposals, the slag and the steam can be introduced into the pelletizing space in a quasi-isothermal manner.
  • hydrocarbons are now introduced into the pelletizing chamber enables the introduction of hydrocarbons to be metered precisely and optimized for the amount of steam introduced, and because of the high degree of superheating of the steam, an extremely rapid reaction with the hydrocarbons introduced into the pelletizing chamber can be carried out.
  • this extremely rapid endothermic reaction of hydrocarbons with superheated steam there is rapid cooling, the superheated steam introduced being largely or completely used up and the energy being stored in the reaction product of the strongly endothermic reaction.
  • carbon monoxide and hydrogen are formed, which can be drawn off largely without steam, so that the problems with condensing water can be largely eliminated.
  • the process according to the invention is advantageously carried out in such a way that steam with temperatures between 1300 ° and 1500 ° C. is used. Since liquid slags are usually introduced into granulation rooms at temperatures of around 1500 ° C., it is largely possible to work isothermally in the area of the slag outlet of a slag storage container, for example a tundish, with such high steam temperatures, so that the desired implementation work is actually performed locally in the granulation room becomes.
  • steam can be used not only in a significantly smaller amount, but also at a significantly lower pressure level, with the procedure advantageously being that the superheated steam is used at a pressure of 1.5 to 3 bar.
  • the strongly superheated steam is generated in a particularly simple manner by superheating the steam, in particular saturated steam, in a regenerative heater.
  • regenerative heaters can be found, for example, as so-called "COWPER" regenerative heaters in steelworks and are used, for example, for hot-blast heating of blast furnaces. Since the saturated steam at relatively low pressure due to such rain rative heater, conventional devices can achieve a high degree of overheating.
  • the desired targeted cooling in the pelletizing chamber can advantageously be achieved by injecting the hydrocarbons into the pelletizing chamber.
  • Such injection of hydrocarbon or injection of gaseous hydrocarbons via appropriate gas outlet nozzles allows the desired cooling effect to be regulated in a targeted manner and adjusted to the minimally required amount of superheated steam.
  • the solidified and comminuted particles can be discharged in one or more stages.
  • the procedure is advantageously such that the granules are withdrawn from the granulating chamber at temperatures ⁇ 650 ° C., preferably ⁇ 600 ° C., via a lock, in particular cellular wheel lock, and that the cracked gas or synthesis gas formed is removed via a dust separator, for example Hot cyclone, is withdrawn. Further particularly finely ground material can be drawn off from the dust separator, so that granules with the desired particle size distribution can be obtained directly.
  • the cracked gas or synthesis gas formed is drawn off at temperatures between 600 ° and 700 ° C.
  • a portion of the cracked gas or synthesis gas formed can be used directly for heating the regenerative heat exchanger for the superheating of steam.
  • Such regenerative heat exchangers can of course also be heated by burning fossil fuels if the high-quality synthesis gas can be used directly, for example, for direct reduction.
  • the substantial saving in steam required allows the procedure to be used in such a way that 0.15 to 0.25 t of steam are used per ton of slag.
  • 1 schematically denotes a saturated steam source, from which saturated steam can be extracted at a pressure of approximately 2 bar.
  • the saturated steam is fed via line 2 and a changeover valve 3 to a first regenerative heat exchanger 4, two superheaters or heat exchangers 4 and 5 being provided, which are operated alternatively.
  • the heat exchangers 4 and 5 are charged with hot combustion gases via lines 6, saturated steam being passed in countercurrent through the heated heat exchangers 4 and 5, respectively.
  • the other heat exchanger 5 or 4 is in turn charged by hot combustion exhaust gases to the correspondingly high temperature for the subsequent overheating of the steam.
  • the superheated saturated steam reaches temperatures of approximately 1500 ° C. in a gas lance 7, which is immersed in a liquid slag bath.
  • the slag bath 8 is contained in a tundish indicated by 9 and leaves this tundish via a slag outlet opening 10, the liquid slag 8 surrounding the overheated steam jet of the lance 7 essentially concentrically.
  • the liquid slag is subsequently discharged into a pelletizing chamber 11, in which hydrocarbons are blown in via lines 12, which lead, for example, to ring nozzles.
  • the reaction of the hydrocarbons with the superheated steam leads to the formation of cracked gas or synthesis gas, with rapid cooling to temperatures below 700 ° C. being achieved since this reaction is highly endothermic.
  • additional lines 13 can be pressurized with pressurized water or water vapor and a pressurized water jet or water vapor directed against the slag jet.
  • the rapidly solidifying material accumulates in the grain size range of approximately 10 to 50 ⁇ m at the lower end of the granulation chamber 11, this accumulation of material being designated 14 schematically.
  • This material can be discharged via a lock, for example a cellular wheel lock 15.
  • the resulting cracked gas or synthesis gas consisting of carbon monoxide and hydrogen passes in the direction of arrow 16 to a subsequent dust separator 17, which is designed as a hot cyclone.
  • the dust particles whose particle size in the
  • Synthesis gas which has been cleaned of solid particles and is largely free of water vapor, can be withdrawn via line 19 and subsequently used for other purposes in a steel mill.
  • this cracked gas or synthetic gas contains a significant proportion of chemical heat which is stored in the cracked gas or synthesis gas.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Inorganic Chemistry (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

L'invention concerne un procédé de pulvérisation et de granulation de scories, selon lequel la scorie liquide (8) est expulsée avec de la vapeur dans une chambre de granulation (11) et refroidie, et de la vapeur surchauffée à une température supérieure à 1000 DEG C est injectée dans la scorie liquide (8), à proximité de l'ouverture de sortie de scorie. Le refroidissement dans la chambre de granulation (11) où est introduite la scorie se fait par réaction endothermique de la vapeur surchauffée avec des hydrocarbures introduits dans ladite chambre de granulation (11), avec formation de CO et de H2.
PCT/AT1999/000275 1998-11-25 1999-11-16 Procede de pulverisation et de granulation de scories Ceased WO2000030989A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU13652/00A AU1365200A (en) 1998-11-25 1999-11-16 Method for crushing and granulating slag

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1982/98 1998-11-25
AT0198298A AT406263B (de) 1998-11-25 1998-11-25 Verfahren zum zerkleinern und granulieren von schlacken

Publications (1)

Publication Number Publication Date
WO2000030989A1 true WO2000030989A1 (fr) 2000-06-02

Family

ID=3525285

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1999/000275 Ceased WO2000030989A1 (fr) 1998-11-25 1999-11-16 Procede de pulverisation et de granulation de scories

Country Status (3)

Country Link
AT (1) AT406263B (fr)
AU (1) AU1365200A (fr)
WO (1) WO2000030989A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1234890A1 (fr) * 2001-02-27 2002-08-28 Tribovent Verfahrensentwicklung GmbH Dispositif de pulvérisation de fontes
JP2009509905A (ja) * 2005-09-30 2009-03-12 タータ スチール リミテッド 鋼プラント廃棄物及び廃熱から水素及び（又は）他の気体を製造する方法
WO2010057763A1 (fr) * 2008-11-21 2010-05-27 Siemens Aktiengesellschaft Procédé et dispositif pour utiliser la chaleur d’échappement d’un laitier liquide
WO2010149495A1 (fr) * 2009-06-25 2010-12-29 Siemens Aktiengesellschaft Procédé d'exploitation de la chaleur perdue d'un processus industriel, dispositif associé et son utilisation
CN102424867A (zh) * 2011-12-31 2012-04-25 钢铁研究总院 一种熔渣粒化和余热回收装置
CN109306384A (zh) * 2018-12-05 2019-02-05 凉山瑞京环保资源开发有限公司 液态钢渣雾化处理装置及液态钢渣雾化处理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3439272A1 (de) * 1984-10-26 1986-05-07 Didier Engineering Gmbh, 4300 Essen Vorrichtung zur rueckgewinnung des waermeinhaltes von schmelzprodukten
WO1995015402A1 (fr) * 1993-12-03 1995-06-08 'holderbank' Financiere Glarus Ag Procede et dispositif de granulation et de broyage de materiaux en fusion et de matieres a moudre
DE19522320C1 (de) * 1995-06-20 1996-08-22 Joseph E Doumet Verfahren und Vorrichtung zum Abkühlen und Verfestigen von glühendflüssiger Hochofenschlacke
EP0829550A1 (fr) * 1996-09-17 1998-03-18 "HOLDERBANK" Financière Glarus AG Procédé pour le traitement de résidus d'incinération dans un convertisseur de métal liquide du type à multiples compartiments

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE429554C (de) * 1926-05-29 Chaux Et Ciments De Lafarge Et Verfahren und Vorrichtung zur Zerkleinerung fluessiger Schlacken durch fluessige oder gasfoermige Mittel unter Druck
DE300510C (fr) *
SU1551678A1 (ru) * 1988-02-02 1990-03-23 Нижнетагильский металлургический комбинат им.В.И.Ленина Способ гранул ции жидких металлургических шлаков

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3439272A1 (de) * 1984-10-26 1986-05-07 Didier Engineering Gmbh, 4300 Essen Vorrichtung zur rueckgewinnung des waermeinhaltes von schmelzprodukten
WO1995015402A1 (fr) * 1993-12-03 1995-06-08 'holderbank' Financiere Glarus Ag Procede et dispositif de granulation et de broyage de materiaux en fusion et de matieres a moudre
DE19522320C1 (de) * 1995-06-20 1996-08-22 Joseph E Doumet Verfahren und Vorrichtung zum Abkühlen und Verfestigen von glühendflüssiger Hochofenschlacke
EP0829550A1 (fr) * 1996-09-17 1998-03-18 "HOLDERBANK" Financière Glarus AG Procédé pour le traitement de résidus d'incinération dans un convertisseur de métal liquide du type à multiples compartiments

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FUJII S: "TREATMENT OF SLAG", CHEMICAL ABSTRACTS + INDEXES,US,AMERICAN CHEMICAL SOCIETY. COLUMBUS, VOL. 107, NR. 20, PAGE(S) 406, ISSN: 0009-2258, XP000015832 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1234890A1 (fr) * 2001-02-27 2002-08-28 Tribovent Verfahrensentwicklung GmbH Dispositif de pulvérisation de fontes
JP2009509905A (ja) * 2005-09-30 2009-03-12 タータ スチール リミテッド 鋼プラント廃棄物及び廃熱から水素及び（又は）他の気体を製造する方法
EP1928781A4 (fr) * 2005-09-30 2011-06-29 Tata Steel Ltd Procede de fabrication d hydrogene et/ou d'autres gaz a partir de dechets d acierie et de chaleur de recuperation
WO2010057763A1 (fr) * 2008-11-21 2010-05-27 Siemens Aktiengesellschaft Procédé et dispositif pour utiliser la chaleur d’échappement d’un laitier liquide
WO2010149495A1 (fr) * 2009-06-25 2010-12-29 Siemens Aktiengesellschaft Procédé d'exploitation de la chaleur perdue d'un processus industriel, dispositif associé et son utilisation
CN102424867A (zh) * 2011-12-31 2012-04-25 钢铁研究总院 一种熔渣粒化和余热回收装置
CN102424867B (zh) * 2011-12-31 2013-07-31 钢铁研究总院 一种熔渣粒化和余热回收装置
CN109306384A (zh) * 2018-12-05 2019-02-05 凉山瑞京环保资源开发有限公司 液态钢渣雾化处理装置及液态钢渣雾化处理方法

Also Published As

Publication number Publication date
AT406263B (de) 2000-03-27
ATA198298A (de) 1999-08-15
AU1365200A (en) 2000-06-13

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