EP1190103B1 - Throat closing device for shaft furnaces, especially blast furnaces having a material feeding hopper - Google Patents

Throat closing device for shaft furnaces, especially blast furnaces having a material feeding hopper Download PDF

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Publication number
EP1190103B1
EP1190103B1 EP00927051A EP00927051A EP1190103B1 EP 1190103 B1 EP1190103 B1 EP 1190103B1 EP 00927051 A EP00927051 A EP 00927051A EP 00927051 A EP00927051 A EP 00927051A EP 1190103 B1 EP1190103 B1 EP 1190103B1
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EP
European Patent Office
Prior art keywords
flange
hopper
furnaces
rotary hopper
rotary
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 - Lifetime
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EP00927051A
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German (de)
French (fr)
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EP1190103A1 (en
Inventor
Jörg OVERLÄNDER
Elmar Korbik
Heinz-Peter Marciniak
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SMS Siemag AG
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SMS Demag AG
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Publication of EP1190103A1 publication Critical patent/EP1190103A1/en
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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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/20—Arrangements of devices for charging
    • 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
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F27D3/0032—Charging or loading melting furnaces with material in the solid state using an air-lock

Definitions

  • the invention relates to a top closure for shaft furnaces, in particular Blast furnaces with a feed hopper opposite to which is a temporarily rotating one the stationary parts of sealed rotary funnels.
  • a bell-type top seal is in the upper area a "small bell” and in the lower area a “big one” Bell ".
  • the upper one of the bells arranged one above the other or funnel rotatable.
  • the invention is therefore based on the issue of a gout closure Kind without providing the disadvantages mentioned, while being structurally simpler and easier to assemble and easy to maintain.
  • a sealing unit consisting of from one arranged above the rotating funnel, to the funnel flange complementary, lifting and lowering adjustable flange, the has flange-side seals and in one with the adjustable flange the bridging wall connecting the stationary part of the rotating funnel a compensator element is formed.
  • the compensator element advantageous for example a loop-like band formation or the like, can be designed so that e.g. an axial movement of approx. 50 mm, a lateral one Movement of approx. 20 mm and an overpressure of 3.5 bar were recorded can be.
  • the system can be controlled so that during the material feed the adjustable flange from the receiving funnel into the "little bell" room is raised.
  • the rotating funnel can rotate for material distribution.
  • the adjustment flange is lowered, see above that the parts are sealed to one another, which allows a necessary one Perform pressure equalization.
  • the movement game that allows deformable compensator element is also capable of a possible Compensate for offset with respect to the axis of rotation.
  • the entire sealing unit or the sealing system is easily accessible from the outside and also enables installation on site.
  • a preferred embodiment of the invention are on the circumference of the stationary Part of the rotary hopper distributed and fixed there lifting cylinders connected to the adjustment flange. Take over these hydraulic cylinders not only lifting and lowering and thus lifting the adjustment flange during the material feed, but can simultaneously apply a holding force, which only needs to be large enough to lift the sealing unit is prevented due to the force from the internal pressure of the shaft furnace.
  • the adjustment flange carries two at a distance ring seals arranged from one another, of which the to the axis of rotation of the Rotating funnel adjacent, front ring seal than when the adjustable flange is raised a seal preventing dust leakage is formed.
  • the material feed is the one that is shifted towards the front of the adjustment flange, outer ring seal ineffective in the raised position of the adjustment flange, i.e. it is not in engagement.
  • the Front ring seal also in the lifted operating position of the adjustment flange a dust leak.
  • the cylinders are moved into the "large bell” room, so that a seal the parts to carry out the necessary pressure equalization.
  • the funnel flange is removed from the ring seal during the process of lowering increasingly approaching adjustment flange on the counter surface lying dust particles are gripped and displaced by the sealing edges of the ring seal, so that a quasi dust-free sealing surface is created.
  • One embodiment of the invention provides that between the rotating funnel flange and a stop is arranged on the adjustment flange.
  • This one preferred adjustable stop attached to the rotating funnel flange prevents inadmissible Pressing the seals. The adjustability allows one to compensate for possible seal wear.
  • the compensator element a sliding apron is connected upstream of the furnace or funnel interior, which is only fixed with one end to the bridging wall and with loosely abuts the other end of the bridging wall.
  • the compensator element there is a reinforcing apron in front of the print area, which due to their one-sided loose design when lifting the Adjustable flange slides with this free end over the bridging wall.
  • Fig. 1 of the overall symmetrical system arrangement as a symmetry half in very schematically, only one hopper 1 with one arranged below it Rotating funnel 2 ("Little bell”) shown, being between the rotating funnel 2 and the hopper 1 a stationary part 3 is provided.
  • the rotating funnel 2 are not shown drive means for rotation about the Assigned axis of rotation 4.
  • a sealing unit 5 is arranged in the space between the rotating funnel 2 and the stationary, load-bearing Part 3, a sealing unit 5 is arranged.
  • this includes one above the funnel flange 6 and to this complementary lifting and lowerable adjustable flange 7, the two on its underside concentrically at a distance from each other arranged ring seals 8, 9, of which the Rotary axis closer ring seal 8 as a dust seal with a rotating funnel flange 6 facing bristle 10 is formed.
  • Over the scope of the stationary part 3 of the rotary hopper 4 are distributed several lifting cylinders 11 attached and connected at its other end to the adjustment flange 7. on the other hand is in a connecting flange 7 with the stationary part 3 cylindrical jacket-shaped bridging wall 12 a loop-like Compensator element 13 formed.
  • FIG. 1 shows the operating phase before the discharge into the rotating funnel 12 abandoned material in which the lifting cylinder 11 lowered the adjustment flange 7 have that the parts are sealed to each other to a to be able to carry out the necessary pressure equalization.
  • the end position of the positioning movement is defined by an adjustable or interchangeable stop 16, which at the same time prevents inadmissible pressing of the ring seals 8 or 9.
  • the loop-like Compensator element 13 enables a compensation of the due to the Cylinder adjustments occurring movement play.
  • the compensator element 13 can do both an axial movement and a lateral movement balance and also absorb a certain excess pressure.
  • the rotary axis closer Ring seal 8, the bristles 10 also in the raised or ventilated state on the counter surface of the rotating funnel flange 6, prevents a rotation in this rotary operating phase of the funnel 2 Dust escaping.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to a throat closing device for shaft furnaces, especially blast furnaces having a material feeding hopper (1), to which a temporarily rotating rotary hopper (2) which is sealed with regard to the stationary parts (3) is connected. The inventive throat closing device is produced such that it has a less complex construction and is easier to install, and can be easily serviced due to the provision of a sealing unit (5) comprised of an adjusting flange (7) which is arranged above the rotary hopper (2), is complementary to the hopper flange (6) thereof, can be lifted and lowered, and which comprises seals (8, 9) located on the flange underside. Said sealing unit is configured in a spanning wall (12) which comprises a compensating element (13) and which connects the adjusting flange (7) to the stationary part (3) of the rotary hopper (2).

Description

Die Erfindung betrifft einen Gichtverschluß für Schachtöfen, insbesondere Hochöfen mit einem Guteinlauftrichter, dem sich ein temporär rotierender, gegenüber den stationären Teilen abgedichteter Drehtrichter anschließt.The invention relates to a top closure for shaft furnaces, in particular Blast furnaces with a feed hopper opposite to which is a temporarily rotating one the stationary parts of sealed rotary funnels.

Für das Einfüllen und Verteilen der Chargen zum Begichten von Schachtöfen sind seit langem Vorrichtungen bekannt, die nach dem sogenannten McKee-Prinzip gebaut sind. Bei dieser Ausführung, einem Glocken-Gichtverschluß, ist im oberen Bereich eine "Kleine Glocke" und im unteren Bereich eine "Große Glocke" angeordnet. Hierbei ist die obere der übereinander angeordneten Glokken oder Trichter drehbar.For filling and distributing the batches for charging shaft furnaces Devices have long been known, based on the so-called McKee principle are built. In this version, a bell-type top seal is in the upper area a "small bell" and in the lower area a "big one" Bell ". Here is the upper one of the bells arranged one above the other or funnel rotatable.

Eine Weiterentwicklung des McKee-Gichtverschlusses sieht vor, daß die untere, große Gichtglocke keinen gasdichten Abschluß bilden muß, weil der mit der Glocke verschlossene Drehverteiler in einer dicht abgeschlossenen Hülle angeordnet ist.A further development of the McKee gout closure provides that the lower, large gout bell does not have to form a gas-tight seal, because the one with the Bell sealed rotary distributor arranged in a tightly sealed envelope is.

Bei einer durch die DE 36 32 724 C2 bekanntgewordenen Anordnung wird dem Problem der Abdichtung zwischen unterer Verteilerglocke und unterer Schleusenkammer dadurch begegnet, daß der obere Trichter mittels einer mit Beschickungsklappen ausgerüsteten feststehenden Haube als druckdichte, abschließbare Schleusenkammer ausgebildet ist.In an arrangement made known by DE 36 32 724 C2, the Problem of sealing between the lower distributor bell and the lower lock chamber countered that the upper hopper by means of a loading flap equipped fixed hood as a pressure-tight, lockable Lock chamber is formed.

Aus der DE-AS 10 13 681 ist eine Abdichtungsvorrichtung an drehbaren Gichtverschlüssen von Hochöfen mit einem an dem Drehtrichter befestigten Druckring und einer dazu passenden ortsfesten, ringförmigen Dichtungsmasse bekannt, wobei die Dichtung von Druckring und Dichtungsmasse durch Federkraft bewirkt wird. In einem auf der Gichthaube gasdicht befestigten Ringgehäuse sind dazu nachstellbare Federn angeordnet, welche die ringförmige Dichtungsmasse an den sich mit dem Drehtrichter drehenden Schleifring stetig anpressen. Der Anpreßdruck der Federn ist durch eine aus einer nachstellbaren Spannschraube bestehenden Spannvorrichtung veränderlich einstellbar.From DE-AS 10 13 681 is a sealing device on rotatable gout closures of blast furnaces with a pressure ring attached to the rotary funnel and a matching stationary, ring-shaped sealing compound is known, where the seal of the pressure ring and sealant by spring force is effected. In a ring housing attached gas-tight on the top cover For this purpose, adjustable springs are arranged, which form the annular sealing compound press steadily on the slip ring rotating with the rotating funnel. The contact pressure of the springs is adjustable from one Clamping screw existing clamping device adjustable.

Bei weiteren bekannten Beschickungsvorrichtungen für Hochöfen, z.B. gemäß DE 20 35 458, DE 20 65 460, die an der Gicht mit Gegendruck betrieben werden, ist ein feststehender, zentraler Guteinlauf vorhanden, über den der Möller auf eine drehbare Schurre fällt. Die Drehlagerung und die Antriebsteile der Schurre befinden sich im Ofenraum. Auch diese zuletzt beschriebene Beschikkungsvorrichtung ist in vielfältiger Weise verbessert worden. So wurden z.B. die Drehlagerung und Antriebsteile der Schurre in einem eigenen Gehäuse angeordnet, das vom übrigen Ofenraum abgeteilt ist. In das erwähnte Gehäuse mündet eine Spülgaseinführung. Dadurch soll verhindert werden, daß heiße und staubbeladene Hochofengase eindringen.In other known blast furnace feeders, e.g. according to DE 20 35 458, DE 20 65 460, which are operated on the gout with back pressure, is a fixed, central Guteinlauf through which the Möller falls on a rotating chute. The pivot bearing and the drive parts of the Chutes are in the furnace room. This last described loading device has been improved in many ways. For example, the Pivot bearing and drive parts of the chute arranged in a separate housing, which is separated from the rest of the furnace. In the mentioned housing opens a purge gas inlet. This is to prevent hot and dust-laden blast furnace gases penetrate.

Für die Materialzuführung zum Betrieb eines Schachtofens sind verschiedene Arten von Begichtungseinrichtungen bekannt. So wird beispielsweise bei einem Glockenverschluß zur Vergleichmäßigung der Materialverteilung ein rotierender Trichter eingesetzt, welcher über einen Zahnkranz angetrieben wird. Der Innenraum des drehenden Trichters steht in mittelbarer Umgebung zum Ofenraum, d.h., daß der Raum der Ofenatmosphäre ausgesetzt ist. Aus diesem Grund ist eine Abdichtung des rotierenden Teils des Trichters gegenüber der Umgebung nötig. Die Abdichtung erfolgt dabei mittels einer Labyrinth-Dichtung unter Verwendung federbelasteter Graphitringe, vorzugsweise aus Segmenten mittels Nut und Feder zusammengesetzt, welche in einer N2-Atmosphäre die Abdichtung vornehmen. Die N2-Atmosphäre muß gegenüber dem Ofendruck geregelt werden, damit immer ein geringer Überdruck gegenüber dem Ofendruck vorhanden ist. Bei Stickstoff handelt es sich zudem um ein Gas, das sehr teuer ist.There are different types of material for operating a shaft furnace Types of exposure devices known. For example, with one Bell closure to even out the material distribution a rotating Funnel used, which is driven by a ring gear. The interior the rotating funnel is in the immediate vicinity of the furnace chamber, i.e. the room is exposed to the furnace atmosphere. For this reason sealing the rotating part of the funnel from the environment necessary. Sealing is done using a labyrinth seal spring loaded graphite rings, preferably from segments by means of Tongue and groove assembled, which in an N2 atmosphere the seal make. The N2 atmosphere must be regulated in relation to the furnace pressure so that there is always a slight overpressure compared to the furnace pressure is. Nitrogen is also a gas that is very expensive.

Der Erfindung liegt daher die Ausgabe zugrunde, einen Gichtverschluß dieser Art ohne die genannten Nachteile vorzusehen, dabei konstruktiv einfacher und montagefreundlicher sowie mit guter Wartungsmöglichkeit zu schaffen. The invention is therefore based on the issue of a gout closure Kind without providing the disadvantages mentioned, while being structurally simpler and easier to assemble and easy to maintain.

Diese Aufgabe wird erfindungsgemäß durch eine Dichtungseinheit gelöst, bestehend aus einem oberhalb des Drehtrichters angeordneten, zu dessen Trichterflansch komplementären, heb- und senkbaren Verstellflansch, der flanschunterseitige Dichtungen aufweist und in einer den Verstellflansch mit dem stationären Teil des Drehtrichters verbindenden Überbrückungswand mit einem Kompensatorelement ausgebildet ist. Das Kompensatorelement, vorteilhaft beispielsweise eine schlaufenartige Bandausformung oder dergleichen, läßt sich so auslegen, daß z.B. eine axiale Bewegung von ca. 50 mm, eine laterale Bewegung von ca. 20 mm sowie ein Überdruck von 3,5 bar aufgenommen werden kann. Das System läßt sich so steuern, daß während der Materialaufgabe vom Aufnahmetrichter in den Raum "Kleine Glocke" der Verstellflansch angehoben ist. Im Anschluß an die Materialaufgabe kann der Drehtrichter zwecks Materialverteilung rotieren. Vor der Entleerung des Raumes "Kleine Glocke" in den Raum "große Glocke" wird der Verstellflansch abgesenkt, so daß eine Abdichtung der Teile zueinander erfolgt, was es erlaubt, einen notwendigen Druckausgleich durchzuführen. Das das Bewegungsspiel zulassende, verformbare Kompensatorelement ist außerdem in der Lage, einen möglichen Versatz bezüglich der Drehachse auszugleichen. Weiterhin wird keine Stickstoffatmosphäre benötigt, um einen geringen Überdruck gegenüber dem Ofendruck zu erzeugen. Die gesamte Dichtungseinheit bzw. das Dichtsystem ist von außen ohne weiteres zugänglich und ermöglicht zudem eine Montage vor Ort.According to the invention, this object is achieved by a sealing unit, consisting of from one arranged above the rotating funnel, to the funnel flange complementary, lifting and lowering adjustable flange, the has flange-side seals and in one with the adjustable flange the bridging wall connecting the stationary part of the rotating funnel a compensator element is formed. The compensator element, advantageous for example a loop-like band formation or the like, can be designed so that e.g. an axial movement of approx. 50 mm, a lateral one Movement of approx. 20 mm and an overpressure of 3.5 bar were recorded can be. The system can be controlled so that during the material feed the adjustable flange from the receiving funnel into the "little bell" room is raised. After the material feed, the rotating funnel can rotate for material distribution. Before emptying the room "Small Bell "in the room" big bell "the adjustment flange is lowered, see above that the parts are sealed to one another, which allows a necessary one Perform pressure equalization. The movement game that allows deformable compensator element is also capable of a possible Compensate for offset with respect to the axis of rotation. Furthermore, none Nitrogen atmosphere required to have a slight positive pressure compared to the To generate furnace pressure. The entire sealing unit or the sealing system is easily accessible from the outside and also enables installation on site.

Nach einer bevorzugten Ausführung der Erfindung sind am Umfang des stationären Teils des Drehtrichters verteilt angeordnete und dort befestigte Hubzylinder mit dem Verstellflansch verbunden. Diese Hydraulikzylinder übernehmen nicht nur das Heben und Senken und damit Anlüften des Verstellflansches während der Materialaufgabe, sondern können gleichzeitig eine Haltekraft aufbringen, die nur so groß zu sein braucht, daß ein Abheben der Dichtungseinheit aufgrund der Kraft aus dem Innendruck des Schachtofens verhindert wird. According to a preferred embodiment of the invention are on the circumference of the stationary Part of the rotary hopper distributed and fixed there lifting cylinders connected to the adjustment flange. Take over these hydraulic cylinders not only lifting and lowering and thus lifting the adjustment flange during the material feed, but can simultaneously apply a holding force, which only needs to be large enough to lift the sealing unit is prevented due to the force from the internal pressure of the shaft furnace.

Nach einem Vorschlag der Erfindung trägt der Verstellflansch zwei im Abstand voneinander angeordnete Ringdichtungen, von denen die zur Drehachse des Drehtrichters benachbarte, vordere Ringdichtung als bei angehobenem Verstellflansch einen Staubaustritt verhindernde Dichtung ausgebildet ist. Während der Materialaufgabe ist die zur Stirnseite des Verstellflansches hin verlagerte, äußere Ringdichtung in angehobener Lage des Verstellflansches nicht wirksam, d.h. sie befindet sich nicht im Eingriff. Hingegen verhindert die drehachsennähere, vordere Ringdichtung auch in der angelüfteten Betriebslage des Verstellflansches einen Staubaustritt. Vor der Entleerung des Raumes "Kleine Glocke" in den Raum "Große Glocke" werden die Zylinder verfahren, so daß eine Abdichtung der Teile zum Durchführen des notwendigen Druckausgleichs erfolgt. Von der Ringdichtung werden im Zuge des sich beim Absenken dem Trichterflansch zunehmend mehr annähernden Verstellflansches auf der Gegenfläche liegende Staubpartikel von den Dichtkanten der Ringdichtung erfaßt und verschoben, so daß eine quasi staubfreie Dichtfläche entsteht.According to a proposal of the invention, the adjustment flange carries two at a distance ring seals arranged from one another, of which the to the axis of rotation of the Rotating funnel adjacent, front ring seal than when the adjustable flange is raised a seal preventing dust leakage is formed. While the material feed is the one that is shifted towards the front of the adjustment flange, outer ring seal ineffective in the raised position of the adjustment flange, i.e. it is not in engagement. On the other hand, the Front ring seal also in the lifted operating position of the adjustment flange a dust leak. Before the "Little Bell" room is emptied the cylinders are moved into the "large bell" room, so that a seal the parts to carry out the necessary pressure equalization. The funnel flange is removed from the ring seal during the process of lowering increasingly approaching adjustment flange on the counter surface lying dust particles are gripped and displaced by the sealing edges of the ring seal, so that a quasi dust-free sealing surface is created.

Einer Ausgestaltung der Erfindung sieht vor, daß zwischen dem Drehtrichterflansch und dem Verstellflansch ein Anschlag angeordnet ist. Dieser bevorzugt einstellbar auf dem Drehtrichterflansch befestigte Anschlag verhindert ein unzulässiges Verpressen der Dichtungen. Die Einstellbarkeit erlaubt es, einen möglichen Dichtungsverschleiß zu kompensieren.One embodiment of the invention provides that between the rotating funnel flange and a stop is arranged on the adjustment flange. This one preferred adjustable stop attached to the rotating funnel flange prevents inadmissible Pressing the seals. The adjustability allows one to compensate for possible seal wear.

Es wird erfindungsgemäß weiterhin vorgeschlagen, daß dem Kompensatorelement zum Ofen- bzw. Trichterinneren hin eine Gleitschürze vorgeschaltet ist, die nur mit ihrem einen Ende an der Überbrückungswand festgelegt ist und mit ihrem anderen Ende der Überbrückungswand lose anliegt. Dem Kompensatorelement ist somit zum Druckbereich hin eine verstärkende Schürze vorgelagert, die aufgrund ihrer einseitig losen Ausführung bei Hubbewegungen des Verstellflansches mit diesem freien Ende über die Überbrückungswand gleitet. It is further proposed according to the invention that the compensator element a sliding apron is connected upstream of the furnace or funnel interior, which is only fixed with one end to the bridging wall and with loosely abuts the other end of the bridging wall. The compensator element there is a reinforcing apron in front of the print area, which due to their one-sided loose design when lifting the Adjustable flange slides with this free end over the bridging wall.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung anhand eines in den Figuren dargestellten Ausführungsbeispiels der Erfindung. Es zeigen:

Fig. 1
als Einzelheit eine Teilansicht einer Dichtungseinheit eines weiter nicht dargestellten Schachtofens, bei anstehendem Ofendruck schematisch gezeigt; und
Fig. 2
eine der geschnittenen Teilansicht nach Fig. 1 entsprechende Darstellung mit demgegenüber zur Materialzuführung angelüftetem Dichtungssystem unter anstehendem Umgebungsdruck.
Further features and advantages of the invention result from the claims and the following description with reference to an embodiment of the invention shown in the figures. Show it:
Fig. 1
as a detail a partial view of a sealing unit of a shaft furnace (not shown), shown schematically when the furnace pressure is present; and
Fig. 2
a representation corresponding to the sectional partial view of FIG. 1, with the sealing system being ventilated for supplying material under the prevailing ambient pressure.

Von einem als solchen hinlänglich bekannten Schachtofen ist in Fig. 1 von der insgesamt symmetrischen Anlagenanordnung als eine Symmetriehälfte in sehr schematischer Weise lediglich ein Guteinlauftrichter 1 mit einem darunter angeordneten Drehtrichter 2 ("Kleine Glocke") gezeigt, wobei zwischen dem Drehtrichter 2 und dem Guteinlauftrichter 1 ein stationärer Teil 3 vorgesehen ist. Dem Drehtrichter 2 sind nicht dargestellte Antriebsmittel zur Rotation um die Drehachse 4 zugeordnet.From a well known as such shaft furnace is in Fig. 1 of the overall symmetrical system arrangement as a symmetry half in very schematically, only one hopper 1 with one arranged below it Rotating funnel 2 ("Little bell") shown, being between the rotating funnel 2 and the hopper 1 a stationary part 3 is provided. The rotating funnel 2 are not shown drive means for rotation about the Assigned axis of rotation 4.

In dem Freiraum zwischen dem Drehtrichter 2 und dem stationären, tragenden Teil 3 ist eine Dichtungseinheit 5 angeordnet. Diese umfaßt einerseits einen oberhalb des Drehtrichterflansches 6 und zu diesem komplementären heb- und senkbaren Verstellflansch 7, der an seiner Unterseite zwei konzentrisch im Abstand voneinander angeordnete Ringdichtungen 8, 9 aufweist, von denen die drehachsennähere Ringdichtung 8 als Staubdichtung mit einer dem Drehtrichterflansch 6 zugewandten Beborstung 10 ausgebildet ist. Über dem Umfang des stationären Teils 3 des Drehtrichters 4 sind verteilt mehrere Hubzylinder 11 befestigt und an ihrem anderen Ende mit dem Verstellflansch 7 verbunden. Andererseits ist in einer den Verstellflansch 7 mit dem stationären Teil 3 verbindenden zylindermantelförmigen Überbrückungswand 12 ein schlaufenartiges Kompensatorelement 13 ausgebildet. Diesem ist zum Ofen- bzw. Trichterinneren 14 hin eine Gleitschürze 15 vorgelagert, die an ihrem oberen, zu dem stationären Teil 3 hin gewandten Ende an der Überbrückungswand 12 festgelegt ist, während ihr gegenüberliegendes Ende frei beweglich ausgebildet ist und bei Verstellbewegungen der Hubzylinder 11 in Richtung des Doppelpfeiles auf dem entsprechenden Abschnitt des unteren Teils der Überbrückungswand 12 gleitet.In the space between the rotating funnel 2 and the stationary, load-bearing Part 3, a sealing unit 5 is arranged. On the one hand, this includes one above the funnel flange 6 and to this complementary lifting and lowerable adjustable flange 7, the two on its underside concentrically at a distance from each other arranged ring seals 8, 9, of which the Rotary axis closer ring seal 8 as a dust seal with a rotating funnel flange 6 facing bristle 10 is formed. Over the scope of the stationary part 3 of the rotary hopper 4 are distributed several lifting cylinders 11 attached and connected at its other end to the adjustment flange 7. on the other hand is in a connecting flange 7 with the stationary part 3 cylindrical jacket-shaped bridging wall 12 a loop-like Compensator element 13 formed. This is to the inside of the furnace or funnel 14 out front a sliding apron 15, the upper, to the stationary Part 3 facing end set on the bridging wall 12 is, while its opposite end is freely movable and at Adjustment movements of the lifting cylinder 11 in the direction of the double arrow on the corresponding section of the lower part of the bridging wall 12 slides.

Die Fig. 1 zeigt die Betriebsphase vor der Entleerung des in den Drehtrichter 12 aufgegebenen Materials, in der die Hubzylinder 11 den Verstellflansch 7 so abgesenkt haben, daß eine Abdichtung der Teile zueinander erfolgt, um einen notwendigen Druckausgleich durchführen zu können. Die Endlage der Anstellbewegung wird von einem einstell- bzw. austauschbaren Anschlag 16 definiert, der gleichzeitig ein unzulässiges Verpressen der Ringdichtungen 8 bzw. 9 verhindert. In der gezeigten abgesenkten Position des Verstellflansches 7 liegen die Dichtkanten der hinteren Ringdichtung 9 satt auf der Gegenfläche des Drehtrichterflansches 6 auf, wobei auf der Gegenfläche liegende Staubpartikel beim Absenken des Verstellflansches 7 von der Dichtkante erfaßt und verschoben werden; ein gleicher Effekt stellt sich bei der Verformung der Beborstung 10 der drehachsennäheren Ringdichtung 8 ein.1 shows the operating phase before the discharge into the rotating funnel 12 abandoned material in which the lifting cylinder 11 lowered the adjustment flange 7 have that the parts are sealed to each other to a to be able to carry out the necessary pressure equalization. The end position of the positioning movement is defined by an adjustable or interchangeable stop 16, which at the same time prevents inadmissible pressing of the ring seals 8 or 9. Lie in the lowered position of the adjustment flange 7 shown the sealing edges of the rear ring seal 9 snugly on the counter surface of the Rotary funnel flange 6, with dust particles lying on the counter surface when lowering the adjusting flange 7 from the sealing edge and moved become; the same effect occurs when the bristles are deformed 10 of the ring seal 8 closer to the axis of rotation.

Zur Materialaufgabe und -verteilung vom Aufnahme- bzw. Einlauftrichter 1 in den Drehtrichter 2 ("Kleine Glocke"), bei dann nur anstehendem Umgebungsdruck, wird der die Dichtung 8, 9 tragende Verstellflansch 7 mittels der Hubzylinder 11 in die in Fig. 2 gezeigte Position angehoben. Das schlaufenartige Kompensatorelement 13 ermöglicht hierbei einen Ausgleich des aufgrund der Zylinderverstellungen auftretenden Bewegungsspiels. Das Kompensatorelement 13 kann sowohl eine axiale Bewegung als auch eine laterale Bewegung ausgleichen und zudem einen gewissen Überdruck aufnehmen. Die drehachsennähere Ringdichtung 8, die mit ihrer Beborstung 10 auch im angehobenen bzw. -gelüfteten Zustand an der Gegenfläche des Drehtrichterflansches 6 anliegt, verhindert in dieser Rotations-Betriebsphase des Drehtrichters 2 einen Staubaustritt. Mit der Dichtungseinheit 5 einschließlich Kompensatorelement 13 wird somit in einfacher Weise eine trotz des für die Rotation des Drehtrichters 2 erforderlichen Bewegungsspiels zuverlässige Abdichtung gewährleistet, wobei die gesamte Einheit frei zugänglich und damit wartungs- sowie montagefreundlich liegt.For material feed and distribution from the intake or inlet funnel 1 in the rotary funnel 2 ("small bell"), when the ambient pressure is then only present, is the seal 8, 9 carrying adjustment flange 7 by means of the lifting cylinder 11 raised to the position shown in FIG. 2. The loop-like Compensator element 13 enables a compensation of the due to the Cylinder adjustments occurring movement play. The compensator element 13 can do both an axial movement and a lateral movement balance and also absorb a certain excess pressure. The rotary axis closer Ring seal 8, the bristles 10 also in the raised or ventilated state on the counter surface of the rotating funnel flange 6, prevents a rotation in this rotary operating phase of the funnel 2 Dust escaping. With the sealing unit 5 including compensator element 13 thus becomes a simple one in spite of the rotation of the rotary funnel 2 required movement clearance ensures reliable sealing, being the entire unit is freely accessible and therefore easy to maintain and install lies.

Claims (5)

  1. Throat closure for shaft furnaces, particularly blast furnaces with a material inlet hopper, with which a temporarily rotating rotary hopper sealed relative to the stationary parts is connected, characterised by a sealing unit (5) consisting of a raisable and lowerable adjusting flange (7) which is arranged above the rotary hopper (2) and complementary to the hopper flange (6) thereof and which has seals (8; 9) at the flange underside and is formed with a compensator element (13) in a bridging wall (12), which is connected with the stationary part (3) of the rotary hopper (2), to the adjusting flange (7).
  2. Throat closure according to claim 1, characterised in that stroke cylinders (11) arranged to be distributed at the circumference of the stationary part (3) of the rotary hopper (2) and fastened there are connected with the adjusting flange (7).
  3. Throat closure according to claim 1 or 2, characterised in that the adjusting flange (7) carries two annular seals (8; 9), which are arranged at a spacing from one another and of which the front annular seal (8) adjacent to the axis (4) of rotation of the rotary hopper (2) is constructed as a seal preventing exit of dust when the adjusting flange (7) is raised.
  4. Throat closure according to one of claims 1 to 3, characterised in that an abutment (16) is arranged between the rotary hopper flange (6) and the adjusting flange (7).
  5. Throat closure according to one of claims 1 to 4, characterised by a slide apron (15) which is connected upstream of the compensator element (13) for the furnace or hopper interior (14), is fixed only by one end thereof to the bridging wall (12) and bears by its other end loosely against the bridging wall (12).
EP00927051A 1999-05-03 2000-04-26 Throat closing device for shaft furnaces, especially blast furnaces having a material feeding hopper Expired - Lifetime EP1190103B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19920002A DE19920002A1 (en) 1999-05-03 1999-05-03 Top seal for shaft furnaces, especially blast furnaces with an inlet hopper
DE19920002 1999-05-03
PCT/EP2000/003722 WO2000066794A1 (en) 1999-05-03 2000-04-26 Throat closing device for shaft furnaces, especially blast furnaces having a material feeding hopper

Publications (2)

Publication Number Publication Date
EP1190103A1 EP1190103A1 (en) 2002-03-27
EP1190103B1 true EP1190103B1 (en) 2003-07-23

Family

ID=7906606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00927051A Expired - Lifetime EP1190103B1 (en) 1999-05-03 2000-04-26 Throat closing device for shaft furnaces, especially blast furnaces having a material feeding hopper

Country Status (12)

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US (1) US6685878B1 (en)
EP (1) EP1190103B1 (en)
AT (1) ATE245705T1 (en)
AU (1) AU4556600A (en)
BR (1) BR0010178A (en)
CA (1) CA2370157A1 (en)
DE (2) DE19920002A1 (en)
MX (1) MXPA01010838A (en)
PL (1) PL350653A1 (en)
RU (1) RU2241044C2 (en)
WO (1) WO2000066794A1 (en)
ZA (1) ZA200108889B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7418664B2 (en) * 2002-04-03 2008-08-26 Microsoft Corporation Application sharing single document sharing
US20070040501A1 (en) 2005-08-18 2007-02-22 Aitken Bruce G Method for inhibiting oxygen and moisture degradation of a device and the resulting device
US8115326B2 (en) 2006-11-30 2012-02-14 Corning Incorporated Flexible substrates having a thin-film barrier
DE102007006795B3 (en) * 2007-02-12 2008-04-03 Takraf Gmbh Dust-free bulk material transfer device e.g. for ship loader, has annular seal provided between transfer chute and rotational cute
LU91885B1 (en) 2011-10-11 2013-04-12 Wurth Paul Sa Blast furnace installation
CN106017119B (en) * 2016-07-14 2023-11-10 重庆赛迪热工环保工程技术有限公司 Furnace body hole sealing device
CN107449282B (en) * 2017-08-31 2023-06-16 中冶华天工程技术有限公司 End sealing device of water sealing ring cooling machine
CN114774604B (en) * 2022-05-24 2023-09-22 宝武集团鄂城钢铁有限公司 Furnace top equipment connection transition sealing device and blast furnace top charging equipment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB258631A (en) 1925-03-30 1926-09-30 Gaston De Bethune Improvements in or relating to packing devices for furnace joints
DE3030541C2 (en) 1980-08-13 1988-09-08 Rudolf P. 7000 Stuttgart Fritsch Device for the continuous production of high molecular weight polymers
JPS6057487B2 (en) * 1981-02-09 1985-12-16 住友重機械工業株式会社 Furnace sealing device
JPS6162782A (en) 1984-09-03 1986-03-31 新日本製鐵株式会社 Turning corn section structure in bellless furnace-top charger
FR2653867B1 (en) 1989-10-31 1992-08-21 France Rayonnement UV DRYING ASSEMBLY WITH SEVERAL TRANSMITTERS.
DE19709329C2 (en) * 1997-03-07 2001-03-08 Sms Demag Ag Bell-less top seal for shaft furnaces, especially blast furnaces

Also Published As

Publication number Publication date
MXPA01010838A (en) 2002-07-30
ZA200108889B (en) 2002-10-30
CA2370157A1 (en) 2000-11-09
EP1190103A1 (en) 2002-03-27
RU2241044C2 (en) 2004-11-27
WO2000066794A1 (en) 2000-11-09
PL350653A1 (en) 2003-01-27
US6685878B1 (en) 2004-02-03
DE50003016D1 (en) 2003-08-28
BR0010178A (en) 2002-01-15
DE19920002A1 (en) 2000-11-09
AU4556600A (en) 2000-11-17
ATE245705T1 (en) 2003-08-15

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