EP0013871A1 - Procédé et dispositif pour le refroidissement de matières calcinées comme les matières frittées ou les pellets - Google Patents

Procédé et dispositif pour le refroidissement de matières calcinées comme les matières frittées ou les pellets Download PDF

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Publication number
EP0013871A1
EP0013871A1 EP79890059A EP79890059A EP0013871A1 EP 0013871 A1 EP0013871 A1 EP 0013871A1 EP 79890059 A EP79890059 A EP 79890059A EP 79890059 A EP79890059 A EP 79890059A EP 0013871 A1 EP0013871 A1 EP 0013871A1
Authority
EP
European Patent Office
Prior art keywords
cooler
shaft
furnace system
cooling
air
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
EP79890059A
Other languages
German (de)
English (en)
Other versions
EP0013871B1 (fr
Inventor
Johann Dipl.-Ing. Haslmayr
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 AG
Original Assignee
Voestalpine 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3496456&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0013871(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voestalpine AG filed Critical Voestalpine AG
Publication of EP0013871A1 publication Critical patent/EP0013871A1/fr
Application granted granted Critical
Publication of EP0013871B1 publication Critical patent/EP0013871B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0286—Cooling in a vertical, e.g. annular, shaft
    • 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
    • C22B1/26—Cooling of roasted, sintered, or agglomerated ores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • F28C3/14—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material moving by gravity, e.g. down a tube
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0071—Use of a comminuting device, e.g. grinding mill
    • 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
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0286—Cooling in a vertical, e.g. annular, shaft
    • F27D2015/0293—Cooling in a vertical, e.g. annular, shaft including rotating parts
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D2099/0085—Accessories
    • F27D2099/0088—Apparatus to cut metal, e.g. logs, in billets

Definitions

  • the invention relates to a method for cooling fired material, such as sinter or pellets, which is broken after leaving a continuously operating furnace system and cooled in a separate cooler with blown air, and to an apparatus for performing this method.
  • the material leaves the furnace system after passing through an ignition zone and a heat treatment zone as a hot sinter cake or as a fired pellet layer and must subsequently be cooled in its own, also continuously working coolers, for which purpose it is broken and subjected to cooling air.
  • a hot sinter cake or as a fired pellet layer The material leaves the furnace system after passing through an ignition zone and a heat treatment zone as a hot sinter cake or as a fired pellet layer and must subsequently be cooled in its own, also continuously working coolers, for which purpose it is broken and subjected to cooling air.
  • coolers pressure ring coolers, cell coolers or stripping coolers
  • the invention is therefore based on the object of specifying a cooling method of the type described at the outset, which allows the heat from the cooling to be virtually completely returned to the combustion process in an economical manner without any particular effort.
  • a simple, practical device for performing this method is to be created.
  • the cooling air is pressed in countercurrent through the material passing through the cooler and then the entire amount of air is fed to the heat treatment zone in the furnace system.
  • Counter-current cooling allows the required amount of cooling air to be kept small in comparison to cross-flow cooling, and the cooling air is warmed up as it passes through the material to be cooled, practically up to the entry temperature of this material into the cooler, ie approximately to 500 to 600 ° C. Because of this high temperature, economic and complete utilization of the cooling air is possible and the entire cooling heat can be returned to the combustion process. This results in a saving of additional fuels for the heat treatment zone of the furnace system, which not only improves the efficiency of the entire system, but also simplifies environmental protection measures, since pollutants mainly come from the fuel.
  • the fired material layer emerging from the furnace system is separated in height into a lower, hotter and an upper, cooler part, and only the hotter parts are passed on to the cooler.
  • the fired material layer coming out of the furnace has a temperature of approx. 1100 ° C in its lower third, while its upper part, about two thirds of the layer height, has cooled almost to room temperature.
  • the temperature transition does not occur continuously, but in narrow thickness ranges.
  • the material layer can therefore be split into a hot and a cold part, whereby only the hot material part of approx. 900 ° C needs to be fed to the cooler and the cold part of approx. 30 ° C can be conveyed directly to cold screening.
  • the cooling air is also heated to a higher temperature and is more economical to use.
  • the amount of material to be cooled remains less.
  • the air stream coming from the cooler is passed through a solids separator before the heat treatment zone.
  • a device with a standing shaft cooler is used, which according to a further development of the invention is characterized in that the shaft cooler receives a known, transversely movable, ring-shaped sliding table, which cooperates with a pyramid or conical material slide, which is arranged coaxially to the shaft cooler at a distance above the drawer and with its tip below the mouth area of a filling shaft connected via a crusher or the like to the material outlet of the furnace system, and that Inlet opening for the cooling air is provided in the area of the sliding table and the cooler connects with a tapering upper part to a pipeline leading to the heat treatment zone of the furnace system.
  • the material that is constantly introduced into the cooler via the filling shaft is divided into a ring by the interaction of the material slide and the sliding table and is continuously discharged.
  • the cooling air flowing from the bottom up finds a large contact surface and can penetrate the material well. This results in a very even cooling of the material, because on the one hand the discharge speed for the material on the outer circumference of the push table is greater than on the inner circumference and on the other hand because of the cone of bulk the mass flow density of the cooling air on the outside is greater than in the center of the shaft cooler, so that the greater Throughput speed of the material with the greater cooling speed conforms due to the greater mass flow density of the air.
  • the drawer which is driven eccentrically and oscillating, does not require any special design effort and is extremely wear-resistant. It allows the material to be discharged over a very large area, so that a high throughput can be achieved even with a low overall height of the cooler.
  • the shaft cooler according to the invention has guide plates or the like which run around the sides in the area of the material chute and which, together with the material chute, form a material guide directed towards the drawer. This not only ensures trouble-free throughput of the material through the cooler, but also forces the cooling air blown between the hot and the already cooled material to flow entirely through the migrating material and provide the full cooling effect.
  • Acceleration of the cooling can also be achieved in that, according to the invention, air passage openings are provided in the material chute, through which cooling air can also penetrate into the material sliding on the chute.
  • a solid separator can advantageously be installed in the pipeline between the cooler and the heat treatment zone, with which this hot return material is separated from the cooling air .
  • the cooler is preceded by a separating device for dividing the fired material into a hotter and a cooler part, the separating device being a conveyor leading to the cooler fill shaft shaft for the hotter and a leading shaft for cold screening or the like for the cooler parts. Since the material layer coming from the kiln has very different temperatures in height, such a separating device makes it possible to split off the cooler material, which no longer has to be fed to the cooler and can immediately be cold-screened. The remaining hotter part of the material is supplied to the filler shaft of the cooler and cooled in the cooler, whereby on the one hand hotter air gets from the cooler into the heat treatment zone and on the other hand only a smaller amount of material has to pass through the cooler.
  • the separating device In order to achieve a simple separation of the material layer into a hotter and a cooler part, the separating device according to the invention consists of a wedge-shaped hammer tool, for example a pneumatic hammer, which strikes from the bottom up and a guide grate which brings the fired material from the furnace system into the effective range of the tool od. The like.
  • the hot material coming from the furnace system is gripped by the guide grate, deflected accordingly in its path and fed to the tool from above, whereby it is split up.
  • the wedge-shaped tool not only separates the material pieces, but also forms sliding surfaces for the separated material parts.
  • the guide grate has end sections that are adjustable relative to the tool center plane. This adjustment of the grate relative to the direction of action of the tool makes it possible to vary the ratio of the split material parts and the temperature or amount of the portion to be supplied to the cooler or the cold sieve to influence.
  • the material to be sintered is applied via a feed device 2 to a traveling grate 3, which leads it through an ignition zone 4 and a heat treatment zone 5.
  • An induced draft fan 6 directs the cooler exhaust gases resulting from the sintering process to the outside, while the hotter exhaust gases are conveyed back into the ignition zone 4 via a fan 7.
  • the finished sintered sinter cake 8 falls off from the traveling grate 3 in larger pieces after leaving the furnace system and comes into a sting crusher 9, where it is broken up into small pieces.
  • the broken sinter cake then passes through a filling shaft 10 into a shaft cooler 11, which it leaves cooled by an emptying shaft 12 and a discharge chute 13 (arrows 8 ').
  • cooling air is blown into the cooler 11 via a fan 14, where it penetrates the feed in counterflow.
  • the heated cooling air is drawn off via a pipeline 15, fed to a solids separator 16, which frees it from the hot return material, and then fed entirely through line 17 to the heat treatment zone 5, so that practically all of the cooling heat can be reused in the sintering process.
  • the shaft cooler 11 which can have a round or angular cross section, has an upwardly tapering upper part 11a, which is connected to the pipe line 15 connects, and a funnel-shaped lower part 11b, which merges into the drainage shaft 12.
  • the shaft cooler 11 receives an annular push table 18, which is mounted so as to be movable transversely on a cross support 19 and can be set into eccentric or oscillating movement by means of a drive 20.
  • a conical or pyramid-shaped material slide 21 which interacts with the sliding table 18, is fixedly mounted on the cross support 19.
  • the tip of the material slide 21 lies below the mouth region 22 of the filling shaft 10, so that the broken sintered material 8a to be cooled is applied to the slide table 18 evenly distributed through the material slide 21 and evenly on the outside of the slide table and through the gap between the slide table movement
  • Drawer and material slide is carried out on the inside of the drawer.
  • Baffles 23 rotating on the side of the shaft cooler serve to regulate the material flow and to direct the cooling air through the material flow.
  • the cooling air is then blown into the shaft cooler 11 by the blower 14 in the area of the push table 18, that is to say between the already cooled material and the still hot material, through inlet openings 14 ′ and penetrates the material to be cooled in counterflow, as indicated by the arrows 24.
  • the filling shaft 10 is now long enough so that the sintered material 8a introduced is self-sealing and only minimal amounts of cooling air can escape through the cooling shaft.
  • additional air passage openings 25 can be provided in the material chute 21, which is indicated in the exemplary embodiment according to FIG. 3.
  • the cooler 11 can now be preceded by a separating device 26 which divides the sinter cake 8 into two parts in terms of height.
  • the sinter cake is namely much hotter on its side resting on the traveling grate 3 than on its free surface, so that only the hotter portion needs to be fed to the cooler 11 through this separating device 26 and the cooler portion is immediately subjected to cold screening, for example can be.
  • the separating device 26 now consists of a wedge-shaped pneumatic hammer 27 which strikes from below and which interacts with a guide grate 28.
  • the sinter cake pieces 8b falling off the traveling grate are gripped by the guide grate 28 on both sides and brought into the effective area of the hammer 27, which divides them into a cooler portion 8b 'and a hotter portion 8b ", which portions are discharged via separate conveyor shafts 29a; 29b to be able to vary the ratio between the two parts, the guide grate 28 has adjustable end sections 30, as a result of which the action level of the hammer 27 can be adjusted relative to the height of the sinter cake pieces 8b and the part 8b "supplied to the cooler can be selected in terms of quantity and temperature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP79890059A 1979-01-30 1979-12-12 Procédé et dispositif pour le refroidissement de matières calcinées comme les matières frittées ou les pellets Expired EP0013871B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT660/79 1979-01-30
AT66079A AT358617B (de) 1979-01-30 1979-01-30 Verfahren und vorrichtung zum abkuehlen von gebranntem material, wie sinter oder pellets

Publications (2)

Publication Number Publication Date
EP0013871A1 true EP0013871A1 (fr) 1980-08-06
EP0013871B1 EP0013871B1 (fr) 1983-11-09

Family

ID=3496456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79890059A Expired EP0013871B1 (fr) 1979-01-30 1979-12-12 Procédé et dispositif pour le refroidissement de matières calcinées comme les matières frittées ou les pellets

Country Status (5)

Country Link
US (1) US4277235A (fr)
EP (1) EP0013871B1 (fr)
JP (1) JPS55104441A (fr)
AT (1) AT358617B (fr)
DE (1) DE2966401D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488985A1 (fr) * 1980-08-21 1982-02-26 Koppers Co Inc Procede et appareil pour le refroidissement de granules
EP0436140A1 (fr) * 1989-12-14 1991-07-10 Linde Aktiengesellschaft Procédé et dispositif de refroidissement d'une substance pulvérulente
EP0522220A1 (fr) * 1991-07-09 1993-01-13 Consergra, S.A. Machine pour refroidir le fourrage de bétail et matériel similaire
EP3096101A1 (fr) * 2015-05-20 2016-11-23 Primetals Technologies Austria GmbH Dispositif de refroidissement de matiere en vrac

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61238885A (ja) * 1985-04-16 1986-10-24 Maruzen Sekiyu Kagaku Kk 炭素製品製造用素原料の精製法
DE102016102843A1 (de) * 2016-02-18 2017-08-24 Aktien-Gesellschaft der Dillinger Hüttenwerke Vorrichtung und Verfahren zur Sinterung von Erz, insbesondere Eisenerz, enthaltendem Mischgut

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039234B (de) * 1955-05-23 1958-09-18 Metallgesellschaft Ag Verfahren zur Leistungssteigerung beim Pelletisieren von Erzen
DE1097346B (de) * 1956-02-10 1961-01-12 Smidth & Co As F L Verfahren und Vorrichtung zum Kuehlen von klumpigem oder koernigem, aus einem Ofen kommendem Gut, z.B. Zementklinker
DE1115930B (de) * 1957-01-29 1961-10-26 Metallgesellschaft Ag Verfahren zum Kuehlen von heissem Gut unterschiedlicher Korngroesse, vorzugsweise von heissem Erzsinter
DE1558609A1 (de) * 1967-04-08 1970-06-11 Walther & Cie Ag Kuehleinrichtung fuer Drehoefen zum Brennen oder Sintern ungeformter oder koerniger Massen
FR2190257A5 (fr) * 1972-06-19 1974-01-25 Kloeckner Humboldt Deutz Ag
DE2238991A1 (de) * 1972-08-08 1974-02-28 Polysius Ag Schachtkuehler
DE2745924A1 (de) * 1977-02-14 1978-08-17 Voest Ag Austragvorrichtung fuer einen schachtofen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155378A (en) * 1960-12-01 1964-11-03 Knapsack Ag Apparatus for conducting sintered material from a sintering grate to a cooling grate
GB1168713A (en) * 1967-04-24 1969-10-29 Head Wrightson & Co Ltd Improvements in Moving Grate Furnaces.
US3909189A (en) * 1971-08-25 1975-09-30 Mcdowell Wellman Eng Co Process for conditioning sinter draft for electrostatic precipitation of particulate material therefrom
JPS4913221A (fr) * 1972-05-19 1974-02-05

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039234B (de) * 1955-05-23 1958-09-18 Metallgesellschaft Ag Verfahren zur Leistungssteigerung beim Pelletisieren von Erzen
DE1097346B (de) * 1956-02-10 1961-01-12 Smidth & Co As F L Verfahren und Vorrichtung zum Kuehlen von klumpigem oder koernigem, aus einem Ofen kommendem Gut, z.B. Zementklinker
DE1115930B (de) * 1957-01-29 1961-10-26 Metallgesellschaft Ag Verfahren zum Kuehlen von heissem Gut unterschiedlicher Korngroesse, vorzugsweise von heissem Erzsinter
DE1558609A1 (de) * 1967-04-08 1970-06-11 Walther & Cie Ag Kuehleinrichtung fuer Drehoefen zum Brennen oder Sintern ungeformter oder koerniger Massen
FR2190257A5 (fr) * 1972-06-19 1974-01-25 Kloeckner Humboldt Deutz Ag
DE2238991A1 (de) * 1972-08-08 1974-02-28 Polysius Ag Schachtkuehler
DE2745924A1 (de) * 1977-02-14 1978-08-17 Voest Ag Austragvorrichtung fuer einen schachtofen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488985A1 (fr) * 1980-08-21 1982-02-26 Koppers Co Inc Procede et appareil pour le refroidissement de granules
EP0436140A1 (fr) * 1989-12-14 1991-07-10 Linde Aktiengesellschaft Procédé et dispositif de refroidissement d'une substance pulvérulente
EP0522220A1 (fr) * 1991-07-09 1993-01-13 Consergra, S.A. Machine pour refroidir le fourrage de bétail et matériel similaire
EP3096101A1 (fr) * 2015-05-20 2016-11-23 Primetals Technologies Austria GmbH Dispositif de refroidissement de matiere en vrac
WO2016184682A1 (fr) * 2015-05-20 2016-11-24 Primetals Technologies Austria GmbH Dispositif de refroidissement d'un produit en vrac
CN106168448A (zh) * 2015-05-20 2016-11-30 首要金属科技奥地利有限责任公司 用于对松散材料进行冷却的冷却装置
RU2707773C2 (ru) * 2015-05-20 2019-11-29 Прайметалз Текнолоджиз Аустриа ГмбХ Охлаждающее устройство для охлаждения сыпучего материала

Also Published As

Publication number Publication date
ATA66079A (de) 1980-02-15
DE2966401D1 (en) 1983-12-15
US4277235A (en) 1981-07-07
AT358617B (de) 1980-09-25
EP0013871B1 (fr) 1983-11-09
JPS55104441A (en) 1980-08-09

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