EP0421979A1 - Procédé pour diminuer l'émission du soufre dans des procédés de frittage - Google Patents

Procédé pour diminuer l'émission du soufre dans des procédés de frittage Download PDF

Info

Publication number
EP0421979A1
EP0421979A1 EP90890268A EP90890268A EP0421979A1 EP 0421979 A1 EP0421979 A1 EP 0421979A1 EP 90890268 A EP90890268 A EP 90890268A EP 90890268 A EP90890268 A EP 90890268A EP 0421979 A1 EP0421979 A1 EP 0421979A1
Authority
EP
European Patent Office
Prior art keywords
coke
sulfur
slurry
lime
sintered
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.)
Granted
Application number
EP90890268A
Other languages
German (de)
English (en)
Other versions
EP0421979B1 (fr
Inventor
Horst Dipl.-Ing. Sulzbacher
Harald Dipl.-Ing. Derler
Heinz Schöllnhammer
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.)
Voestalpine Stahl Linz GmbH
Voestalpine Rail Technology GmbH
Original Assignee
Voestalpine Stahl Donawitz GmbH
Voestalpine Schienen GmbH
Voestalpine Stahl Linz 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 Voestalpine Stahl Donawitz GmbH, Voestalpine Schienen GmbH, Voestalpine Stahl Linz GmbH filed Critical Voestalpine Stahl Donawitz GmbH
Publication of EP0421979A1 publication Critical patent/EP0421979A1/fr
Application granted granted Critical
Publication of EP0421979B1 publication Critical patent/EP0421979B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/10—Treating solid fuels to improve their combustion by using additives

Definitions

  • the invention relates to a method for reducing pollutant emissions in thermal processes, such as in particular sintering processes, in which a fuel-containing mixture, in particular a coke bed, is ignited.
  • EP-A1 39 305 has already disclosed a method for reducing pollutant emissions during sintering, in which an extraneous rust coating is applied as an intermediate layer between the raw sintered layer and the sintered grate.
  • the proposed intermediate layer consists of granular material which should be able to remove pollutants. This granular sorbent material is moistened for significant pollutant emissions, with particularly large effects being achieved with basic slurries or liquids. Lime milk was preferably given as the basic slurry, a correspondingly larger volume of sulfur-containing waste products being formed in addition to the coke ash.
  • the invention now aims to provide a method of the type mentioned, in which, without increasing the amount of materials to be handled, enriched with pollutants, a reduction in pollutant emissions, in particular an almost complete desulphurization of the exhaust gases can be achieved without expensive flue gas desulfurization.
  • the invention consists in essential in that the pore-rich fuel fraction, especially the coke, of the mixture is rolled with Ca (OH) 2 or soaked with a slurry of hydrated lime before the fuel-containing mixture is given up.
  • the process according to the invention is preferably carried out in such a way that, based on the amount of coke, 5-30% by weight Ca (OH) 2, preferably 10-25% by weight, are used in dry form and the coke is rolled together with the hydrated lime .
  • Ca (OH) 2 preferably 10-25% by weight
  • an almost unchanged ignition temperature of the coke could be maintained in the case of rolling coke with dry lime hydrate, with the treatment of dried coke with a lime hydrate slurry in the stated proportions by weight lowering the ignition temperature by 40-45 ° C was observed.
  • Such a lower ignition temperature had a higher reak activity and led to particularly good sulfur incorporation in the ashes.
  • a slurry of Ca (OH) 2 is preferably used in 1 to 3 parts by weight of water per part by weight of Ca (OH) 2.
  • slurries with one part by weight of Ca (OH) 2 and one part by weight of H2O as well as slurries with one part by weight of Ca (OH) 2 and three parts by weight of H2O resulted in a particularly strong reduction in the ignition temperature, whereas a treatment of coke with a slurry from one part by weight of Ca (OH) 2 to two parts by weight of H2O still resulted in a lowering of the ignition temperature by about 35 ° C.
  • Sinter coke is primarily used for such sintering purposes, as mentioned above, and in the process according to the invention it is preferred to use sinter coke in a grain size of 0.5-5 mm, preferably 1 to 3 mm.
  • the sintered coke to be used is dried before rolling or before treatment with the hydrated lime slurry, temperatures around 100 ° C. appearing particularly suitable as drying temperatures.
  • a high level of sulfur incorporation can be achieved with the least use of foreign material in that the hydrated lime slurry in an amount of 20-50, preferably 25 to 50 wt .-%, based on coke, is used.
  • the sulfur incorporation could be further optimized by controlling the process temperatures and, according to a preferred procedure, the sintering temperatures are kept low.
  • a sample of the coke mixed with lime sludge or hydrated lime was placed in a retort and heated in a tube furnace with air supply at a heating rate of approx. 5 ° C./min.
  • the exhaust gas composition was continuously measured during the heating phase.
  • the ignition point of the sample mixtures was characterized by a significantly faster rise in the sample temperature and the beginning of CO2 development.
  • the ignition temperatures of the individual samples were 450 ° C. in the case of example 1, 455 ° C. in the case of example 2 and 450 ° C. in the case of example 3.
  • the ignition temperature of the sample of Example 4 was not determined and that of Example 5 was 495 ° C.
  • the ignition temperature of the untreated coke with a grain size of 1 to 3 mm is 490 ° C.
  • the sintered coke samples pretreated according to Examples 1 to 5 were subjected to ashing.
  • the ashing was carried out at three different temperatures, namely 900 ° C, 1000 ° C and 1100 ° C.
  • the incorporation of sulfur into the ashes was created here a sulfur analysis before and after ashing.
  • the results of the sulfur incorporation in the ashes are shown in Figure 1, which is a block diagram of the sulfur incorporation in the ashes.
  • the percent sulfur incorporation is shown on the ordinate and on the abscissa, arranged side by side, the results of the three ashing tests carried out in each case with untreated coke and with the sintered coke breeze treated with hydrated lime.
  • a particularly high sulfur incorporation value in the ash namely 96.5%, was achieved by ashing the sintered coke pretreated according to Example 2 at 900 ° C.
  • the values of the sulfur incorporation at the ashing temperatures 1000 and 1100 ° C. were approximately in the range obtained for the ashing of the mixtures according to Example 1 and Example 3.
  • the largest percentage of sulfur incorporation is achieved at the lowest incineration temperature and the relatively lowest percentage of sulfur incorporation can be achieved at the highest incineration temperature.
  • the percentages of sulfur incorporation in the sinter coke pretreated according to the invention are at least four times as high as those which could be achieved in the ashing of untreated coke.
  • the sulfur emission via sintered exhaust gases depends on the sulfur content of the sintered coke. This sulfur burns primarily to SO2. A reduction in SO2 formation is theoretically possible through a sulfidic bond in the sinter itself.
  • the temporary setting of the coke sulfur in the sinter reduces the SO2 emissions through the sintered exhaust gas and helps to comply with or fall below the prescribed emission values.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Metallurgy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Sludge (AREA)
EP90890268A 1989-10-06 1990-10-05 Procédé pour diminuer l'émission du soufre dans des procédés de frittage Expired - Lifetime EP0421979B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2315/89A AT393095B (de) 1989-10-06 1989-10-06 Verfahren zum verringern der schwefelemission bei sinterprozessen
AT2315/89 1989-10-06

Publications (2)

Publication Number Publication Date
EP0421979A1 true EP0421979A1 (fr) 1991-04-10
EP0421979B1 EP0421979B1 (fr) 1994-03-30

Family

ID=3532090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90890268A Expired - Lifetime EP0421979B1 (fr) 1989-10-06 1990-10-05 Procédé pour diminuer l'émission du soufre dans des procédés de frittage

Country Status (7)

Country Link
US (1) US5116588A (fr)
EP (1) EP0421979B1 (fr)
JP (1) JPH03192194A (fr)
KR (1) KR910008151A (fr)
AT (1) AT393095B (fr)
DE (1) DE59005179D1 (fr)
ES (1) ES2053170T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0526446A3 (en) * 1991-06-28 1993-04-07 Voest-Alpine Stahl Donawitz Gmbh Process for reducing harmful emissions in sintering processes
EP0992594A1 (fr) * 1998-10-08 2000-04-12 Sidmar N.V. Procédé de réduction des émissions de dioxines et de furanes par les installations d'agglomération de minerais de fer

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100321621B1 (ko) * 1997-12-27 2002-05-13 이구택 질소산화물및황산화물을저감할수있는소결광제조방법
US20060127599A1 (en) * 2002-02-12 2006-06-15 Wojak Gregory J Process and apparatus for preparing a diamond substance
AU2005262871B2 (en) * 2004-06-28 2011-06-09 Douglas C. Comrie Reducing sulfur gas emissions resulting from the burning of carbonaceous fuels
JP5617766B2 (ja) * 2011-06-08 2014-11-05 新日鐵住金株式会社 炭材の改質処理設備
JP5598439B2 (ja) * 2011-07-20 2014-10-01 新日鐵住金株式会社 焼結鉱の製造方法
JP5810836B2 (ja) * 2011-10-28 2015-11-11 新日鐵住金株式会社 焼結鉱製造用の改質炭材の製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2154955A1 (de) * 1971-11-05 1973-05-17 Rheinische Braunkohlenw Ag Verfahren und vorrichtung zur anwendung von feinkoernigen brennstoffen, insbesondere feinkoernigen braunkohlenkoksen, fuer die sinterung, insbesondere von eisenerzen
DE2501503A1 (de) * 1975-01-16 1976-07-22 Ruhrkohle Ag Verfahren zur entschwefelung der abgase von wirbelbettfeuerungen
EP0039305A1 (fr) * 1980-04-25 1981-11-04 MANNESMANN Aktiengesellschaft Procédé pour réduire l'émission de polluants pendant l'agglomération par frittage
DE3635206A1 (de) * 1986-10-16 1988-04-21 Westfaelische Berggewerkschaft Verfahren zur verfeuerung fossiler festbrennstoffe unter entwicklung von rauchgasen mit herabgesetztem schwefelgehalt

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19591C (de) * 1900-01-01 Dr. TH. OPPLER in Doos bei Nürnberg Verfahren zur Absorption von gas- und dampfförmigen Säuren durch Briquettes
DE234059C (fr) *
DE131959C (fr) *
US4093451A (en) * 1977-09-28 1978-06-06 Cardd, Inc. Coke agglomerate and method of utilizing same
DE3131959A1 (de) * 1981-08-13 1983-02-24 Johann Schaefer Kalkwerke, 6252 Diez "verfahren zur herstellung einer homogenen mischung aus feinteiligem kalkhydrat und feuchter kohle"
JPS5876728A (ja) * 1981-10-31 1983-05-09 Tokyo Electric Co Ltd ロ−ドセル式台秤
DD234059A1 (de) * 1985-01-18 1986-03-19 Buna Chem Werke Veb Verfahren zur entgiftung der rauchgase von feuerungsanlagen
SE457014B (sv) * 1987-03-25 1988-11-21 Abb Stal Ab Saett att foerbaettra utnyttjningen av svavelabsorbent vid foerbraenning i en fluidiserad baedd och en kraftanlaeggning med foerbraenning i fluidiserad baedd

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2154955A1 (de) * 1971-11-05 1973-05-17 Rheinische Braunkohlenw Ag Verfahren und vorrichtung zur anwendung von feinkoernigen brennstoffen, insbesondere feinkoernigen braunkohlenkoksen, fuer die sinterung, insbesondere von eisenerzen
DE2501503A1 (de) * 1975-01-16 1976-07-22 Ruhrkohle Ag Verfahren zur entschwefelung der abgase von wirbelbettfeuerungen
EP0039305A1 (fr) * 1980-04-25 1981-11-04 MANNESMANN Aktiengesellschaft Procédé pour réduire l'émission de polluants pendant l'agglomération par frittage
DE3635206A1 (de) * 1986-10-16 1988-04-21 Westfaelische Berggewerkschaft Verfahren zur verfeuerung fossiler festbrennstoffe unter entwicklung von rauchgasen mit herabgesetztem schwefelgehalt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0526446A3 (en) * 1991-06-28 1993-04-07 Voest-Alpine Stahl Donawitz Gmbh Process for reducing harmful emissions in sintering processes
EP0992594A1 (fr) * 1998-10-08 2000-04-12 Sidmar N.V. Procédé de réduction des émissions de dioxines et de furanes par les installations d'agglomération de minerais de fer

Also Published As

Publication number Publication date
US5116588A (en) 1992-05-26
ES2053170T3 (es) 1994-07-16
JPH03192194A (ja) 1991-08-22
AT393095B (de) 1991-08-12
DE59005179D1 (de) 1994-05-05
KR910008151A (ko) 1991-05-30
EP0421979B1 (fr) 1994-03-30
ATA231589A (de) 1991-01-15

Similar Documents

Publication Publication Date Title
DE4498936C2 (de) Verfahren zur Herstellung von aktiviertem Koks für Prozesse zur gleichzeitigen Desulfurierung und Denitrierung
DE3045743C2 (de) Verfahren zum Trocknen von organischen Feststoffen, insbesondere Braunkohlen unter Verwendung von Wasserdampf
EP2016203B1 (fr) Procédé thermique de séparation de métaux lourds de cendres sous forme agglomérée
DE69509907T2 (de) Regenerierungsverfahren eines mit stickstoff behandelten kohlenstoffhaltigen für die entfernung von schwefelwasserstoff verwendeten materials
AT393095B (de) Verfahren zum verringern der schwefelemission bei sinterprozessen
DE2855166A1 (de) Verfahren zur herstellung von oxidischen kernbrennstoffkoerpern
DE3013753A1 (de) Hydrophober katalysator fuer rekombinatoren
DE3135200A1 (de) Verfahren zur behandlung von endprodukten aus der rauchgasentschwefelung
CH660754A5 (de) Waermebestaendiges, ferritisches kugelgraphit-gusseisen.
EP0239683A1 (fr) Procédé de fabrication de granules solides à partir de boues minérales
EP0664145B1 (fr) Procédé de purification des gaz de combustion
DE2559047A1 (de) Pigment auf der basis von alpha- eisen(iii)-oxid und verfahren zu seiner herstellung
DE2614342C3 (de) Verfahren zum Herstellen von Eisenpulver mit faseriger Struktur
DE2461921C3 (de) 31.12.73 Japan 3871-74 24.01.74 Japan 9770-74 25.01.74 Japan 10209-74 Pelletmaterial mit einer geringeren Stickstoffoxidemission zum Herstellen von Sintererz für die Eisenerzeugung
AT395828B (de) Verfahren zur verringerung von schadstoffemissionen bei sinterprozessen
DE3319086A1 (de) Verfahren zum einbinden des in der braunkohle befindlichen schwefels in den festen verbrennungsrueckstaenden sowie braunkohlenbrikett
DE3018743C2 (fr)
DE3603003A1 (de) Verfahren zur herstellung von aktiviertem kohlenstoff aus veredelter braunkohle
DE2731933C2 (de) Verfahren zum Herstellen von Pellets aus eisenhaltigen Stäuben
DE2501294C2 (fr)
AT45809B (de) Verfahren zum Entschwefeln roher Bleierze.
EP3395457B1 (fr) Procédé de traitement et de décontamination de cendre volante
DE4317179C2 (de) Verfahren zur Herstellung von Braunkohlenpreßlingen mit verminderter SO¶2¶-Emission bei Verbrennung
AT368686B (de) Verfahren zur herstellung von tonhaeltigen tabakrauchfiltern bzw. -filterteilen
DE505791C (de) Verfahren zur Herstellung rauchfrei verbrennender Brikette

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

AK Designated contracting states

Kind code of ref document: A1

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

17P Request for examination filed

Effective date: 19910909

17Q First examination report despatched

Effective date: 19920313

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Owner name: VOEST-ALPINE STAHL LINZ GMBH

Owner name: VOEST-ALPINE SCHIENEN GMBH

AK Designated contracting states

Kind code of ref document: B1

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

REF Corresponds to:

Ref document number: 59005179

Country of ref document: DE

Date of ref document: 19940505

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2053170

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940624

ET Fr: translation filed
REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3012202

EAL Se: european patent in force in sweden

Ref document number: 90890268.7

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19960901

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960923

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960924

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19960925

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19960926

Year of fee payment: 7

Ref country code: DE

Payment date: 19960926

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19960927

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19961018

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 19961031

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971005

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971005

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971006

Ref country code: ES

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19971006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971031

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19971031

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971031

BERE Be: lapsed

Owner name: VOEST-ALPINE STAHL LINZ G.M.B.H.

Effective date: 19971031

Owner name: VOEST-ALPINE SCHIENEN G.M.B.H.

Effective date: 19971031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980501

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19971005

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19980501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980701

EUG Se: european patent has lapsed

Ref document number: 90890268.7

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20001102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051005