EP0013871B1 - 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

Info

Publication number
EP0013871B1
EP0013871B1 EP79890059A EP79890059A EP0013871B1 EP 0013871 B1 EP0013871 B1 EP 0013871B1 EP 79890059 A EP79890059 A EP 79890059A EP 79890059 A EP79890059 A EP 79890059A EP 0013871 B1 EP0013871 B1 EP 0013871B1
Authority
EP
European Patent Office
Prior art keywords
cooler
hotter
tool
shaft
fired material
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.)
Expired
Application number
EP79890059A
Other languages
German (de)
English (en)
Other versions
EP0013871A1 (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
Family has litigation
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(B1) "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

Links

Images

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 in counterflow 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 operating coolers, for which purpose it is broken and subjected to cooling air.
  • 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 operating coolers, for which purpose it is broken and subjected to cooling air.
  • DE-B-1 039234 it is already known from DE-B-1 039234 to push air blown into the cooler in countercurrent through the material passing through the cooler and at least some of the cooling heat by returning the cooling air to the heat treatment zone of the furnace system to recycle.
  • the invention is therefore based on the object of specifying a cooling method of the type described at the outset, which enables the cooling heat to be returned to the combustion process with a high degree of utilization without any particular effort.
  • a simple, appropriate device for performing this method is to be created.
  • the invention achieves this object in that the fired material layer emerging from the furnace system is vertically divided into a lower, hotter and an upper one cooler part is separated and only the hotter parts are forwarded to the cooler.
  • the fired material layer coming out of the furnace has a temperature of approximately 1100 ° C. in its lower third, while its upper part, approximately two thirds of the layer height, has cooled almost to room temperature. The temperature does not change 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 portion of approx.
  • 900 ° C needs to be fed to the cooler and the cold portion of approx. 30 ° C can be directly conveyed to cold screening. Since material with a uniformly higher temperature thus gets into the cooler, the cooling air is also heated to a higher temperature, and because of this high temperature, particularly economical and extensive utilization of the cooling air is possible. In addition, the amount of material to be cooled becomes smaller and additional fuel is saved 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 are mainly come from the fuel.
  • the cooler is preceded by a separating device for dividing the burned material into a hotter and a cooler part, the separating device being a conveyor shaft for the hotter and one that leads to the filling shaft of the cooler has a feed shaft for the cooler parts leading to cold screening. 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 subjected to cold screening. The remaining hotter portion of the material is supplied to the filler shaft of the cooler and cooled in the cooler, whereby on the one hand hotter air from the cooler enters the heat treatment zone and on the other hand only a smaller amount of material has to pass through the cooler.
  • the separating device 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.
  • the hot material coming from the furnace system is thus gripped by the guide grate, in its path accordingly deflected and fed to the tool from above, whereby it is split.
  • the wedge-shaped tool not only separates the material pieces, but also forms sliding surfaces for the separated material parts.
  • the guide grate also has end sections that are adjustable with respect to the tool center plane, it is possible to vary the ratio of the split material parts by this adjustment of the grate in relation to the direction of action of the tool and to influence the temperature or amount of the portion to be supplied to the cooler or the cold screening.
  • the material to be sintered is applied to a traveling grate 3 via a feed device 2, 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 pipe 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 connects to the pipeline 15, and a funnel-shaped lower part 11b, which merges into the emptying 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 area 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 as well as 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 is 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 immediately undergoes 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 from 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (4)

1. Procédé pour refroidir des matières calcinées telles que les matières frittées ou les pellets qui, après avoir quitté une installation de four travaillant en continu, sont broyés et refroidis avec de l'air insufflé à contre-courant dans un dispositif de refroidissement distinct, tandis que l'ensemble de la quantité d'air refoulée à travers la matière qui traverse le réfrigérant, est amenée à la zone du traitement thermique dans l'installation du four, caractérisé par le fait que la couche de matière calcinée, qui sort de l'installation du four, est divisée dans sa hauteur en une partie inférieure plus chaude et une partie supérieure plus froide et que seules les parties plus chaudes sont conduites au réfrigérant.
2. Dispositif pour la mise en oeuvre du procédé suivant la revendication (1), qui comprend un réfrigérant caractérisé par le fait qu'il est prévu en amont du réfrigérant (11) un dispositif (26) séparateur pour partager la matière (8b) calcinée en une partie (8b") plus chaude et en une partie (8b') plus froide, tandis que le dispositif séparateur présente un puits de transport (29b) menant au puits de chargement du réfrigérant pour les parties plus chaudes et un puits (29a) de transport menant au criblage à froid pour les parties plus froides.
3. Dispositif suivant la revendication (2), caractérisé par le fait que le dispositif (26) séparateur se compose d'un outil cunéiforme genre marteau frappant de bas en haut, par exemple d'un marteau piqueur (27) pneumatique, et d'une grille (28) de guidage qui amène matière (8b) calcinée de l'installation (1) du four dans la sphère d'action de l'outil.
4. Dispositif suivant la revendication (3), caractérisé par le fait que la grille (28) de guidage présente des tronçons (30) terminaux positionnables par rapport au plan médian de l'outil.
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
AT66079A AT358617B (de) 1979-01-30 1979-01-30 Verfahren und vorrichtung zum abkuehlen von gebranntem material, wie sinter oder pellets
AT660/79 1979-01-30

Publications (2)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7279981A (en) * 1980-08-21 1982-02-25 Koppers Company, Inc. Method + apparatus for cooling pellets
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
DE3941262C1 (fr) * 1989-12-14 1991-08-01 Linde Ag, 6200 Wiesbaden, De
EP0522220A1 (fr) * 1991-07-09 1993-01-13 Consergra, S.A. Machine pour refroidir le fourrage de bétail et matériel similaire
TR201807475T4 (tr) * 2015-05-20 2018-06-21 Primetals Technologies Austria GmbH Dökme malzemenin soğutulması için soğutma aygıtı.
DE102016102843A1 (de) * 2016-02-18 2017-08-24 Aktien-Gesellschaft der Dillinger Hüttenwerke Vorrichtung und Verfahren zur Sinterung von Erz, insbesondere Eisenerz, enthaltendem Mischgut

Family Cites Families (10)

* 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
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
DE2229810A1 (de) * 1972-06-19 1974-01-17 Kloeckner Humboldt Deutz Ag Kuehlvorrichtung fuer stueckiges ofengut
DE2238991C3 (de) * 1972-08-08 1978-06-29 Polysius Ag, 4723 Neubeckum Schachtkühler für stückiges Gut
AT345002B (de) * 1977-02-14 1978-08-25 Voest Ag Austragvorrichtung fuer einen schachtofen

Also Published As

Publication number Publication date
DE2966401D1 (en) 1983-12-15
AT358617B (de) 1980-09-25
ATA66079A (de) 1980-02-15
JPS55104441A (en) 1980-08-09
EP0013871A1 (fr) 1980-08-06
US4277235A (en) 1981-07-07

Similar Documents

Publication Publication Date Title
DE2343339C3 (de) Vorrichtung zum Abkühlen von aus einem Drehrohrofen ausgetragenen Klinkerkörnern
DE824854C (de) Verfahren und Vorrichtung zur Waermebehandlung von kleinen Formkoerpern aus Erz- undMineralstaub
DE2712238A1 (de) Verfahren und vorrichtung zum mehrstufigen erbrennen von zementklinker
DE3131514C1 (de) Verfahren zum Kuehlen von Kuehlgutbetten und Stauvorrichtung zur Durchfuehrung des Verfahrens
EP3452425B1 (fr) Installation et procédé pour la préparation d'un liant
DE2307165A1 (de) Verfahren und vorrichtung zur direkten kuehlung von feinkoernigem bis grobkoernigem gut mittels kuehlluft
DE3039854C2 (fr)
EP0013871B1 (fr) Procédé et dispositif pour le refroidissement de matières calcinées comme les matières frittées ou les pellets
DE2737533C2 (de) Vorrichtung zum Kühlen von gebranntem teilchenförmigem Material
DE2602285C2 (de) Verfahren zum Sintern feinkörnigen Materials, insbesondere Eisenerzes
DE1136675B (de) Verfahren und Vorrichtung zur Durchfuehrung endothermer Prozesse auf dem Sinterband
EP0215210B1 (fr) Procédé et installation de fabrication à chaud de briquettes sans liant
DE4109396C2 (de) Verfahren zum Herstellen von Eisenerz-Pellets
DE202012003687U1 (de) Indurationsmaschine mit Vorkühlzone
WO2021074057A1 (fr) Dispositif de refroidissement et procédé permettant de refroidir un matériau en vrac
DE3036957C2 (fr)
DE1907494C3 (de) Hubbalkenofen
DE4304458A1 (de) Vorrichtung zur Kühlung von heißem, körnigem Material
BE1027666B1 (de) Kühler zum Kühlen von Schüttgut
DE2020823B2 (de) Vorrichtung zur herstellung von gesintertem erz
BE1027673B1 (de) Kühler und Verfahren zum Kühlen von Schüttgut
DE3323565A1 (de) Verfahren und anordnung zur herstellung von zement nach dem belit-typ
WO2016113049A1 (fr) Procédé de réduction des oxydes d'azote dans les effluents gazeux d'une installation de traitement à flux entrainé dérivé et installation de traitement à flux entrainé
DE3541677A1 (de) Verfahren und rohrkuehler zur kuehlung thermisch behandelter mineralischer rohstoffe
DE3347272A1 (de) Vorrichtung zum vorwaermen von stueckigen erzen o. dgl.

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

Designated state(s): DE FR GB

17P Request for examination filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 2966401

Country of ref document: DE

Date of ref document: 19831215

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: KRUPP - KOPPERS GMBH

Effective date: 19840724

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

Ref country code: FR

Payment date: 19841119

Year of fee payment: 6

Ref country code: DE

Payment date: 19841119

Year of fee payment: 6

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

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

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19850410

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST