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EP0174676A1 - Procédé de traitement thermique de grains ou d'agglomérés sur une grille mobile - Google Patents

Procédé de traitement thermique de grains ou d'agglomérés sur une grille mobile Download PDF

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Publication number
EP0174676A1
EP0174676A1 EP85201282A EP85201282A EP0174676A1 EP 0174676 A1 EP0174676 A1 EP 0174676A1 EP 85201282 A EP85201282 A EP 85201282A EP 85201282 A EP85201282 A EP 85201282A EP 0174676 A1 EP0174676 A1 EP 0174676A1
Authority
EP
European Patent Office
Prior art keywords
zone
cooling
gas
gases
thermal treatment
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
EP85201282A
Other languages
German (de)
English (en)
Other versions
EP0174676B1 (fr
Inventor
Alois Dr. Kilian
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of EP0174676A1 publication Critical patent/EP0174676A1/fr
Application granted granted Critical
Publication of EP0174676B1 publication Critical patent/EP0174676B1/fr
Expired legal-status Critical Current

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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
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2413—Binding; Briquetting ; Granulating enduration of pellets
    • 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
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/06—Endless-strand sintering machines

Definitions

  • the invention relates to a method for thermally treating lump or agglomerated materials on a traveling grate by passing hot gases through the material bed, wherein hot gases in a thermal B lung zone ehand- with downward flow of the hot gases through the material bed passed are, oxygen-containing cooling gases in a cooling zone with upward flow of the cooling gases through the material bed, and the heated cooling gases are passed under a continuous gas hood from the cooling zone into the thermal treatment zone.
  • Lumpy, agglomerated or shaped materials of any shape, such as Limestone, ore pellets, chamotte, waste materials are in many cases thermally treated on traveling grates in such a way that hot gases are passed through the material bed on the traveling grate, whereby the material is heated to a certain temperature. The material bed is then cooled while passing cold gases through it. The heated cooling gases are led into the thermal treatment zone and used as the primary and / or secondary gas for the burners.
  • the thermal treatment zone generally consists of a drying zone, a heating zone and a firing zone, it being possible for these zones to be subdivided. The cooling zone is also divided in most cases.
  • the entire gases in the cooling zone are already heated to the maximum required temperature and must then be cooled to the temperature required there, for example in the heating zone, by adding cold air.
  • This results in the maximum gas volume in the cooling zone the continuous gas hood must have a correspondingly large cross-section, the heat losses on the walls are large and a cover in the form of another gas must be above the afterburning zone hood can be arranged. This cover leads to dust deposition and formation of deposits.
  • Both versions have the advantages that the gases are heated very evenly when the solid fuel is burned and the gas volume is kept relatively low. When using burners, these can be operated with less load, but there is still a certain problem of ash deposition in the channels. In both cases, cheap solid fuels can be used and energy costs are reduced according to the amount of solid fuel that is fed. However, solid fuel is not always available or the optional use of liquid or gaseous fuels is desired.
  • the invention has for its object to reduce the energy consumption in the thermal treatment when using liquid or gaseous fuels and to reduce the construction and operating costs of the system as possible.
  • the flow rate of the heated cooling gases under the continuous gas hood over the upper run of the traveling grate is set so high that the signs of buoyancy in the vertical direction have practically no influence and thereby parallel current threads with different temperatures are generated under the gas hood, fuel is introduced into individual current threads, individual current threads are heated to differently higher temperatures and then downwards in the thermal treatment zone passed through the material bed.
  • the thermal treatment zone always comprises the firing zone or, in the case of a subdivision, the firing zone and the heating zone.
  • the drying zone can be arranged outside the continuous gas hood, but it can also be included in the thermal treatment zone and covered by the continuous gas hood.
  • the continuous gas hood If the drying zone is not located under the continuous gas hood, only the first part of the cooling zone is located under the gas hood, so that only the hottest cooling gases are captured by the continuous gas hood. If the drying zone is also located under the continuous gas hood, the second part of the cooling zone is also located under the gas hood. Air is generally used as the cooling gas. If other gases are used, they must already contain sufficient oxygen for the combustion of the fuels n or their oxygen content must be enriched. "Current threads" are to be understood as layers of the gases under the continuous gas hood, which flow one above the other and parallel to one another, and which extend across the width of the gas hood.
  • the flow velocity of the current filaments under the gas hood is set so high that the signs of buoyancy under the gas hood in vertical direction practically no influence on the flow behavior.
  • the signs of buoyancy are mainly caused by different temperatures of the individual current filaments.
  • the exact geometric course of the current threads can be determined by calculations and / or tests on a physical flow model, the flow conditions of the overall system being selected such that a stable and defined stratified flow is established.
  • the heating of individual flow filaments is carried out by different B racing stoffeindüsung within the respective boundary lines of the individual current thread.
  • the boundary lines and thus the thickness of the respective current filament are selected in accordance with the desired operating conditions.
  • Each individual current filament with a different starting temperature can be heated up to a different or the same end temperature depending on the desired operating conditions.
  • a certain amount of gas per m 2 and hour must enter the material bed in the thermal treatment zone. This amount is introduced into the cooling zone by controlling the cooling gas fan accordingly. If the combustion of the introduced fuel causes a change in the gas volume, the gas volume introduced into the cooling zone must be changed accordingly.
  • a preferred embodiment is that the flow rate of the heated cooling gases under the continuous gas hood at the transition point from upward flow and downward flow of the gases through the material bed on the traveling grate is above 3 m / sec, preferably between 10 to 60 m / sec.
  • the transition point between upward flow and downward flow lies at the boundary between the end of the thermal treatment zone and the start of the cooling zone.
  • a preferred feature is that the A ufhei- wetting of individual current paths under the continuous gas hood as short as possible before the entry of the respective current thread into the material bed is effected on condition that the permissible on entry into the bed temperature differences within the respective current thread does not be crossed, be exceeded, be passed.
  • the permissible temperature difference within a filament depends on the respective process conditions at the entry zone of the filament into the bed. For example, the permissible difference in the hard firing of pellets in the heating zone can be greater, for example 20 to 40 ° C, while it should be less than 20 ° C in the firing zone.
  • the uniformity of the gas temperature within a current filament depends on the pulse ratios of the fuel injected and the current filament from the point of addition to entry into the bed.
  • a preferred embodiment is that the fuel for heating the individual current threads is introduced into the current threads with little or no gas. If gas, for example natural gas, is introduced as fuel, usually no further gas is required to generate pulses when the fuel is injected. If oil or fine-grained solid fuel is introduced, the fuel is injected only with the pulse gas required for good distribution, but without primary or secondary gas. This pulse gas is in the range of 0.05 to a maximum of 0.25 mass units, based on the fuel chosen. This results in a very good heat balance.
  • gas for example natural gas
  • a preferred embodiment is that current threads emerging in the cooling zone are heated with environmentally harmful constituents and at a low temperature just above the material bed by adding fuel.
  • Current filaments emerging in the cooling zone can contain environmentally harmful constituents if cooling gases which already contain such constituents are used, or if a second material layer is applied to the fired hot material bed in the cooling zone, from which such constituents are volatilized if they are is flowed through and heated by the cooling gases heated in the hot lower layer.
  • the filaments are heated to a temperature at which the environmentally harmful substances are converted into harmless form. The early heating ensures that the conversion is largely carried out. Heating preferably takes place only in the filaments with a low outlet temperature, e.g. below 600 ° C. Any further heating required for the thermal treatment zone can take place shortly before the current filament enters the bed.
  • a preferred embodiment consists in that the continuous gas hood is arranged over the entire treatment length of the traveling grate and at least some of the current threads are led from the last part of the cooling zone into the drying zone without additional heating, the coldest current thread coming from the rearmost part of the cooling zone the first part of the drying zone is passed, and current threads are introduced into the subsequent parts of the drying zone with increasing temperature.
  • the continuous gas hood is arranged both above the first and the second cooling zone and also includes the drying zone as a thermal treatment zone. The gas flow is carried out in such a way that the last stream of filament obtained at the end of the second cooling zone the lowest temperature under the ceiling of the G ashaube first current thread in the beginning of the drying zone through without heating is.
  • substitution gas is introduced from the outside into the filament before entering the material bed in the thermal treatment zone, and the volume of the product gas entering the material bed in the thermal treatment zone by regulating the volume of the in the Cooling zone introduced cooling gases is set to the predetermined setpoint.
  • Flue gases, reducing gases, air, oxygen-enriched gases, pure oxygen or mixtures can be used as substitution gas.
  • the substitution gases can originate from our own process or consist of extraneous gas.
  • the substitution gas is injected from the sides of the gas hood into the corresponding current filaments. Individual current threads can be partially substituted by mixing, or they can also be replaced entirely by the substitution gas.
  • substitution gas means that the inlet gas volume required per m 2 and hour in the thermal treatment zone is not completely covered by the heated cooling gas coming from the cooling zone, but that a part is introduced by the substitution gas, ie the volume of the cooling gas becomes reduced by the volume of the substitution gas.
  • substitution gas is a reaction gas and eak- of chemical R functions takes part that cause a change in the gas volume, this volume change is taken into account in determining the amount of the introduced cooling gas volume, so that the volume of the entering into the material bed volume of the product Gas always corresponds to the target value of the desired gas volume.
  • the R EGE development of the injected volume of cooling gas is preferably carried out in such a way that the pressure is measured in the gas hood over the thermal treatment zone and konsantbone by regulating the cooling gas blower, that is, as much cooling gas supplied so that the extracted amount of gas constant at the Setpoint is maintained.
  • substitution gas makes it possible to influence and control chemical processes at certain points during the thermal treatment of the material.
  • the oxidation of the magnetite to hematite or the combustion of the carbon in the region of low temperatures of the pellet bed can be delayed or prevented and accelerated in the higher temperature range.
  • the release of the heat of oxidation from a lower temperature level - at which sufficient process exhaust gases are available for heating the bed - can be postponed to a higher temperature level where foreign fuel would otherwise be required.
  • One embodiment consists in that takes place after the thermal treatment of the material a T eilkühlung, and reducing in a subsequent reduction zone gases are passed through the material bed.
  • the iron oxide-containing material in the form of pellets or briquettes is first hard-baked, then eilkühlung in the T on the R edutationstemperatur cooled and reduced in a subsequent reduction zone while passing reducing gases to sponge iron.
  • the sponge iron can then be hot charged into a melting unit.
  • the gas emerging from the reduction zone still contains reducing components. It can be recirculated to the gas generator for strengthening or used as fuel in the thermal treatment zone.
  • the reduction zone is equipped with its own gas hood when the sponge iron is thrown off hot.
  • the reducing gas can be passed down or up through the bed.
  • One embodiment is that after the reduction zone, the reduced material is cooled in a further cooling zone, a continuous gas hood is arranged over the entire traveling grate, exhaust gases from the thermal treatment zone and / or from the reduction zone as cooling gas in the further cooling zone upwards through the reduced material are passed, the current threads from the further cooling zone under the gas hood are passed as upper current threads into the thermal treatment zone, the reducing gases are introduced as substitution gases into the gas hood above the reduction zone and are passed down through the material bed. In some cases it is necessary to cool the sponge iron before dropping it, this cooling taking place under non-oxidizing conditions with respect to the sponge iron. This cooling takes place in one or more cooling zones which are connected to the reduction zone.
  • exhaust gases from the thermal treatment zone with low oxygen content can be passed upward through the bed as cooling gas.
  • the exhaust gases are previously cooled to the required cooling temperature in heat exchangers.
  • exhaust gases fall with a low oxygen content in the wind boxes in which are lower than current paths, where B racing material was burned for heating.
  • the oxygen content must be lowest in the first cooling zone. It can be a little higher in the following cooling stages.
  • the reducing gas is injected into the reduction zone just above the bed and distributed over the length of the reduction zone. The reducing gas acts as a substitution gas and replaces the filaments that would enter the reduction zone from the cooling zone without this gas. So there is no need for partitions.
  • Chemical reactions between adjacent current threads can be prevented by interposing narrow current threads as separating gas, the chemical composition of the separating gas, for example flue gas, being chosen accordingly.
  • the separation gas is expediently injected as a substitution gas just above the bed, but it can also be supplied below the grate wagon.
  • the exhaust gas from the reduction zone which has a low calorific value, can preferably be injected as a substitution gas into the filaments for the heating zone and at the beginning of the combustion zone and in mixtures with fresh reducing gas as a substitution gas with a higher calorific value into the electricity filaments which lead to the further combustion zone. If other gases are present, such as blast furnace gas, steel gas, coke gas, natural gas, these can be used instead of the exhaust gas from the reduction zone.
  • the temperature of the material bed in the reduction zone can be influenced by adjusting the ratio of CO to H 2 in the reducing gas and thus also the temperature of the bed with which it enters the cooling zone.
  • the reducing gas is expediently generated by gasification in a circulating fluidized bed with oxygen or oxygen-enriched air with simultaneous hot desulfurization.
  • Such as G has a high reduction potential and at a high combustion calorific value.
  • a preferred embodiment consists in that after the reduction zone the reduced material is cooled in a further cooling zone, solid carbonaceous material is applied to the surface of the material bed, exhaust gas from the reduction zone in the further cooling zone upwards through the bed of sponge iron and the like the hot carbon-containing layer located thereon is guided and thereby strengthened, and the current filaments with the strengthened gas as the reducing gas are passed into the reduction zone.
  • the solid carbonaceous material is preferably applied to the bed as a layer from the partial cooling zone. There the carbonaceous material is ignited by the cooling air, partially burned and heated up. The combustion gases heat up the corresponding current filaments for the combustion zone and, if appropriate, for the heating zone.
  • the exhaust gas from the reduction zone which contains a certain content of C0 2 and H 2 0 as a result of the reduction, is passed up through the bed in the cooling zone, being heated up and then flowing through the glowing layer of the carbon-containing material.
  • the C0 2 and H 2 0 content of the gas is converted back into CO and H 2 .
  • the strengthened gas is fed back into the reduction zone in the corresponding flow threads. There, it is first passed down through the layer of carbonaceous material, further strengthening it, and then passed through the bed as a reducing gas.
  • the added carbon-containing material can be present as a quiescent layer or as a fluidized bed or can be carried along by the gases. Carried particles are returned to the cooling zone with the bed until they are completely used up.
  • the figures represent schematic cross sections through the upper run of hiking grates with gas hoods above and wind boxes below the upper run. The subdivision of the wind boxes below the moving grate has been omitted for clarification.
  • Current threads 1 to 5 are shown under the continuous gas hood G.
  • At 6 the material is fed onto the upper run 7 and at 8 the material is dropped from the upper run 7.
  • the material is first dried in a pressure drying zone a with a separate gas hood 9 and then in a suction drying zone a 1 with a separate gas hood 10.
  • the material is then heated in heating zone b and burned in firing zone c.
  • Heating zone b and firing zone c represent the thermal treatment zone.
  • Current threads 1 to 4 emerge from first cooling zone d and flow into zones b and c.
  • fuel nozzles 11, 11a are arranged on both sides of the continuous gas hood G just above the entry into the bed.
  • the second cooling zone 1 d with separate gas hood 12 is effected, the cooling of the material on the A bschtemperatur.
  • a layer of solid material is placed on the bed at 13 at the beginning of the first cooling zone d, which layer is thermally treated by the emerging hot cooling gas.
  • the continuous gas hood is arranged over the entire length of the upper run 7 and includes the drying zone a, which thus also belongs to the thermal treatment zone.
  • the continuous gas hood G Under the continuous gas hood G, five flow threads 1 to 5 are shown, of which the flow thread 5 is passed from the last part of the cooling zone d into the drying zone a.
  • Fuel nozzles 11, 11a are arranged in the current threads 3 and 4.
  • the continuous gas hood G is also arranged over the entire length of the upper run 7, and five current threads 1 to 5 are shown under the gas hood.
  • a substitution gas 15a having a low oxygen content is injected through the nozzles 15.
  • a substitution gas having a high oxygen content is injected through the nozzles 16. Characterized the substitution gas 15a is delayed, for example, the oxidation of magnetite or the combustion of fuel in the bed in the inlet region and in the inlet region of the S ubstitutionsgases 16a, these reactions are accelerated in the region of higher temperature.
  • the substitution gases can also be supplied at other points 17 or 19 and 18 or 20, depending on whether a complete or partial substitution of current threads is intended.
  • the injection of the gas within hood G takes place at lower D ruckdiffe- limit to the environment than in the feed points 19 and 20th
  • FIG. 5 shows a combined thermal treatment with T a drying zone, heating zone, b, c burning zone and T eilkühlungs- zone depicted d. This is followed by the reduction zone e, the first further cooling zone f and the second further cooling zone g.
  • the nozzle 21 is short-reducing gas injected above the bed, drawn through the bed, cooled in heat exchanger 22 via line 23 and fuel nozzles in the S 2 tromfaden injected.
  • a separating gas is injected through the nozzles 24, which prevents a reaction between the flow thread 2 and the reducing gas. If necessary, at 25 or 25a, a separation gas can also be injected when the S tromfa- contains the 3 large amounts of oxygen.
  • solid fuel can be charged onto the bed, which serves to strengthen the gases in the stream 3 of reducing components.
  • the exhaust gas from the heating zone b is passed via the cooler 27 and line 28 into the first cooling zone f.
  • a fuel gas with a higher calorific value is injected into the flow thread 1 via fuel nozzles 11a.
  • the exhaust gas from the combustion zone c is passed via the cooler 29 and line 30 into the second further cooling zone g.
  • FIG. 5 A thermal treatment with subsequent reduction is also shown in FIG.
  • the reducing gas is circulated and always strengthened. This strengthening takes place in such a way that the exhaust gas from the reduction zone e is returned to the further cooling zone f after cooling in the heat exchanger 22 via line 31, heated in the bed of reduced material and then by a glowing layer of solid carbonaceous material on the bed is directed. C0 2 and H 2 0 contained in the recirculated exhaust gas are converted with C to CO and H 2 .
  • the strengthened gas flows as stream thread 4 into the reduction zone, is passed there again through a layer of solid carbon-containing material on the bed, is further strengthened and enters the bed as a reducing gas.
  • the solid carbonaceous material will charged onto the bed via the feed points 26a.
  • the carbon-containing material given up in the further cooling zone d is partially burned by the cooling air and heated in the process.
  • the hot combustion gases heat up the filaments 1 and 2.
  • a partial flow of the exhaust gas from the reduction zone is removed and can uel as fuel nozzles via line 23 in the B are directed.
  • Exhaust gas from the heating zone b and the combustion zone c can be passed as cooling gas via line 30a into the second further cooling zone g.
  • the advantages of the invention are that the heat and gas formation of the system is improved and thereby the energy consumption is reduced, and the construction and operating costs of the system and the environmental pollution caused by pollutants in the exhaust gases can be reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)
EP85201282A 1984-09-08 1985-08-08 Procédé de traitement thermique de grains ou d'agglomérés sur une grille mobile Expired EP0174676B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3433043 1984-09-08
DE19843433043 DE3433043A1 (de) 1984-09-08 1984-09-08 Verfahren zur thermischen behandlung von stueckigen oder agglomerierten materialien auf einem wanderrost

Publications (2)

Publication Number Publication Date
EP0174676A1 true EP0174676A1 (fr) 1986-03-19
EP0174676B1 EP0174676B1 (fr) 1988-04-20

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ID=6244938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85201282A Expired EP0174676B1 (fr) 1984-09-08 1985-08-08 Procédé de traitement thermique de grains ou d'agglomérés sur une grille mobile

Country Status (7)

Country Link
US (1) US4689007A (fr)
EP (1) EP0174676B1 (fr)
BR (1) BR8504304A (fr)
CA (1) CA1261146A (fr)
DE (2) DE3433043A1 (fr)
IN (1) IN166362B (fr)
ZA (1) ZA856850B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9301631A (nl) * 1992-10-09 1994-05-02 Metallgesellschaft Ag Werkwijze voor het hard bakken van ijzeroxyde bevattende pellets.
WO1996032510A1 (fr) * 1995-04-10 1996-10-17 Siemens Aktiengesellschaft Installation de granulation
DE102011110842A1 (de) * 2011-08-23 2013-02-28 Outotec Oyj Vorrichtung und Verfahren zur thermischen Behandlung von stückigem oder agglomeriertem Material

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630864A (en) * 1995-11-24 1997-05-20 Rierson; David W. Method of processing ore on a traveling grate
FI118539B (fi) * 2006-03-15 2007-12-14 Outotec Oyj Laitteisto ja menetelmä kaasun kuumentamiseksi sintrauksen yhteydessä
FI119940B (fi) * 2007-09-06 2009-05-15 Outotec Oyj Menetelmä ja nauhasintrauslaitteisto pelletoidun mineraalimateriaalin jatkuvatoimiseksi sintraamiseksi ja esipelkistämiseksi
US8202470B2 (en) * 2009-03-24 2012-06-19 Fives North American Combustion, Inc. Low NOx fuel injection for an indurating furnace
US8662887B2 (en) * 2009-03-24 2014-03-04 Fives North American Combustion, Inc. NOx suppression techniques for a rotary kiln
US20100244337A1 (en) * 2009-03-24 2010-09-30 Cain Bruce E NOx Suppression Techniques for an Indurating Furnace
US9250018B2 (en) * 2009-11-06 2016-02-02 Fives North American Combustion, Inc. Apparatus and methods for achieving low NOx in a grate-kiln pelletizing furnace
US20110143291A1 (en) * 2009-12-11 2011-06-16 Clements Bruce Flue gas recirculation method and system for combustion systems
FI123418B (fi) * 2010-09-24 2013-04-15 Outotec Oyj Menetelmä mineraalimateriaalin jatkuvatoimiseksi sintraamiseksi ja sintrauslaitteisto
FI20105986A0 (fi) * 2010-09-24 2010-09-24 Outotec Oyj Menetelmä sintrausuunin käynnistämiseksi ja sintrauslaitteisto
US9976806B2 (en) * 2013-10-30 2018-05-22 Posco Burning apparatus and method for manufacturing reduced iron using the same
BR112020001681B1 (pt) * 2017-08-03 2022-06-14 Outotec (Finland) Oy Dispositivo e método para tratamento térmico de material volumoso
CN111351369A (zh) * 2020-04-30 2020-06-30 昆山宇顺环保科技有限公司 一种利用烧结环冷废气在储料场烘干块矿的装置及方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1244355A (fr) * 1959-09-10 1960-10-28 Houilleres Bassin Du Nord Four pour le traitement des combustibles agglomérés
US3172754A (en) * 1965-03-09 anthes
FR1465102A (fr) * 1965-01-22 1967-01-06 Centre Nat Rech Metall Procédé et dispositif pour le traitement thermique de matières solides
GB2042144A (en) * 1979-02-06 1980-09-17 Luossavaara Kiirunavaara Ab Sintering ore pellets
DE3041958A1 (de) * 1979-11-06 1981-05-14 Voest - Alpine AG, 1011 Wien Verfahren zur steuerung einer pelletieranlage fuer feinkoernige erze
EP0030396A1 (fr) * 1979-12-08 1981-06-17 Metallgesellschaft Ag Procédé de traitement thermique des pellets

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2143905A (en) * 1937-07-14 1939-01-17 Smidth & Co As F L Process for burning cement and similar raw material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172754A (en) * 1965-03-09 anthes
FR1244355A (fr) * 1959-09-10 1960-10-28 Houilleres Bassin Du Nord Four pour le traitement des combustibles agglomérés
FR1465102A (fr) * 1965-01-22 1967-01-06 Centre Nat Rech Metall Procédé et dispositif pour le traitement thermique de matières solides
GB2042144A (en) * 1979-02-06 1980-09-17 Luossavaara Kiirunavaara Ab Sintering ore pellets
DE3041958A1 (de) * 1979-11-06 1981-05-14 Voest - Alpine AG, 1011 Wien Verfahren zur steuerung einer pelletieranlage fuer feinkoernige erze
EP0030396A1 (fr) * 1979-12-08 1981-06-17 Metallgesellschaft Ag Procédé de traitement thermique des pellets

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9301631A (nl) * 1992-10-09 1994-05-02 Metallgesellschaft Ag Werkwijze voor het hard bakken van ijzeroxyde bevattende pellets.
WO1996032510A1 (fr) * 1995-04-10 1996-10-17 Siemens Aktiengesellschaft Installation de granulation
AU701166B2 (en) * 1995-04-10 1999-01-21 Npwp Toreks Pelletizing plant
DE102011110842A1 (de) * 2011-08-23 2013-02-28 Outotec Oyj Vorrichtung und Verfahren zur thermischen Behandlung von stückigem oder agglomeriertem Material
US9790570B2 (en) 2011-08-23 2017-10-17 Outotec Oyj Apparatus and method for the thermal treatment of lump or agglomerated material

Also Published As

Publication number Publication date
DE3433043A1 (de) 1986-03-20
CA1261146A (fr) 1989-09-26
ZA856850B (en) 1987-05-27
IN166362B (fr) 1990-04-21
DE3562298D1 (en) 1988-05-26
BR8504304A (pt) 1986-07-01
EP0174676B1 (fr) 1988-04-20
US4689007A (en) 1987-08-25

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