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WO2020053397A1 - Appareil de chargement supérieur pour charger un matériau dans un haut fourneau et procédé d'ouverture et de fermeture d'une ouverture inférieure d'une trémie d'un appareil de chargement de haut fourneau - Google Patents

Appareil de chargement supérieur pour charger un matériau dans un haut fourneau et procédé d'ouverture et de fermeture d'une ouverture inférieure d'une trémie d'un appareil de chargement de haut fourneau Download PDF

Info

Publication number
WO2020053397A1
WO2020053397A1 PCT/EP2019/074507 EP2019074507W WO2020053397A1 WO 2020053397 A1 WO2020053397 A1 WO 2020053397A1 EP 2019074507 W EP2019074507 W EP 2019074507W WO 2020053397 A1 WO2020053397 A1 WO 2020053397A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotation shaft
seal valve
opening
charging apparatus
rotation
Prior art date
Application number
PCT/EP2019/074507
Other languages
English (en)
Inventor
Oleksandr Domin
Ewout TESSELAAR
Angelico Della Negra
Massimiliano ZAMPA
Original Assignee
Danieli & C. Officine Meccaniche S.P.A.
Danieli Corus B.V.
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 Danieli & C. Officine Meccaniche S.P.A., Danieli Corus B.V. filed Critical Danieli & C. Officine Meccaniche S.P.A.
Publication of WO2020053397A1 publication Critical patent/WO2020053397A1/fr

Links

Classifications

    • 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 specially adapted for furnaces of these types
    • F27B1/20—Arrangements of devices for charging

Definitions

  • the present invention relates to a top charging apparatus for charging material in a blast furnace, provided with an opening/closing device for closing or opening the bottom opening of a material hopper.
  • a known device includes a shut-off flap valve or furnace mouth flap valve, which is used to control the charging of a blast furnace with coke and burden material.
  • the device includes a flap plate which, for the purpose of closing or opening the opening of the material hopper arranged above the mouth of a blast furnace, is movable into an open position and into a closed position.
  • a drive mechanism is usually in articulated connection at the flap rim, by which it is ensured that, in the open position, the flap plate leaves the flow opening substantially completely clear.
  • the flap plate is pivoted out relatively far away from the opening, so that the mouth of the blast furnace has to be correspondingly dimensioned in order to avoid a collision of the flap plate with loose material.
  • a further known device avoids this disadvantage by means of a flap plate in articulated connection with two pivot arms which are mounted so that they can pivot about pivot axes that extend parallel to one another. It is ensured therein that, when the flap plate moves from the closed position to the open position and vice-versa, the rim regions of the flap plate move along oppositely directed arcuate paths.
  • the movement of the flap plate obtained in that manner brings about a movement of the flap plate on a trajectory close to the bottom opening, as a result of which the charging system of the blast furnace can be of more compact construction overall. Guiding the flap plate along the arcuate paths brings about, in the region of the opening, a relative movement between the rim region of the flap plate and the sealing seat provided for the flap plate at the bottom opening.
  • a top charging apparatus for charging material in a blast furnace which comprises a material hopper, having a top opening and a bottom opening defining a longitudinal axis X; and a closing/opening device for closing or opening said bottom opening; wherein said closing/opening device comprises:
  • At least one handling lever connected to said seal valve, for moving the seal valve from a closing position to a maximum opening position, or vice versa;
  • first rotation shaft and the second rotation shaft have axes of rotation Y, Y’ parallel from one another and perpendicular to a first plane containing the longitudinal axis X;
  • the closing/opening device also comprises:
  • Another aspect of the invention refers to a method for opening the bottom opening of the hopper of said top charging apparatus, the method comprising the following steps:
  • a further aspect of the invention refers to a method for closing the bottom opening of the hopper of said top charging apparatus, the method comprising the following steps:
  • the sealing system can comprise a material gate and a seal valve with a sealing disc.
  • the seal valve is used to pressurize the part below and/or above the sealing disc (i.e. the pressure below or above the disc is higher than the pressure above or below the disc). Any equipment that should be pressurized (for example material bunker) or a blast furnace can be placed below the seal valve.
  • the seal valve arrangement is setup with two particular geometrical constraints:
  • the seal valve rotates and simultaneously laterally moves up with a movement similar to a spherical movement.
  • the advantage compared to only rotational movement is that the total height (seal valve including disc in open / partly opened position) is minimum.
  • a further advantage is that dust could fall down from the disc (as compared to horizontal moving discs).
  • the first actuator ensures a linear, substantially vertical, movement of the seal valve, whereas the second actuator ensures a pivoting movement of said seal valve.
  • the stroke of the first actuator is advantageously shorter than the stroke of the second actuator.
  • rotating actuators can be used.
  • the whole mechanism is designed to limit the freedom of movements.
  • Both actuators are relatively strong actuators, because they are designed to ensure opening at high differential pressure. Sealing force is provided by both said actuators.
  • Mechanical stops can be provided to stop movements of the components at the correct position. Such mechanical stops can have various designs and can have adjustment possibility.
  • Both actuators can be electrical, hydraulic or pneumatic.
  • FIGS. 1 a and 1 b depict perspective views of an apparatus according to the invention
  • Figure 2 depicts a first side view of the apparatus of Figure 1 ;
  • Figure 3 depicts a second side view of the apparatus of Figure 1 ;
  • Figure 4 depicts a top view of the apparatus of Figure 1 ;
  • Figures 5 depicts a cross section view of the apparatus of Figure 1 in an operating position
  • Figures 6a and 6b depict side views of parts of the apparatus in two operating positions
  • Figures 7a and 7b depict side views of parts of the apparatus in two operating positions.
  • top charging apparatus according to the invention, indicated by the numeral reference 1 as a whole, suitable for charging material in a blast furnace.
  • the top charging apparatus 1 comprises:
  • a material hopper 2 having a top opening 3 and a bottom opening 4 defining a longitudinal axis X;
  • the upper part of the hopper 2 includes a material inlet zone 20 ( Figure 5) between the top opening 3 and a material control valve 21 , placed between said top opening 3 and the bottom opening 4.
  • the material control valve 21 is preferably a gate valve comprising two arcuate parts sliding over one another.
  • Dedicated actuator 30 and linkage 31 are provided to move the arcuate parts of the control valve 21 from a closing position to an opening position ( Figures 1 b, 2).
  • the closing/opening device for closing or opening the bottom opening 4 comprises:
  • a seal valve 5 - at least one handling lever 6, connected to the seal valve 5, for moving the seal valve 5 from a closing position to a maximum opening position, or from the closing position to an intermediate opening position, and vice versa;
  • Said intermediate opening position is placed between the closing position and maximum opening position.
  • the closing/opening device also comprises:
  • the rotation shaft 14 and the rotation shaft 16 have a respective axis of rotation Y, Y’. These two axes of rotation Y, Y’ are arranged always parallel from one another and perpendicular to a plane containing the longitudinal axis X. The axes of rotation Y, Y’ lie completely, and thus define, a further plane A.
  • the two parallel axes of rotation Y, Y’ are arranged in fixed positions. Said fixed positions are at a same side of the top charging apparatus comprising the maximum opening position of the seal valve 5.
  • at least one of the two rotation shafts 14, 16 and, thus, the respective axis of rotation Y, Y’ are not arranged in a fixed position.
  • at least one of the two rotation shafts 14, 16 can move along a sliding rail or along a linear or curvilinear path defined within slots provided on the end support structures 40, 41 ( Figure 2) of said at least one rotation shaft.
  • the positions of the two rotation shafts 14, 16 are at a same side of the top charging apparatus comprising the maximum opening position of the seal valve 5.
  • the further plane A is inclined by an acute angle higher than 30°, for example in the range of 30-45°, with respect to the plane containing the longitudinal axis X and orthogonal to the sheet of Figure 5.
  • the seal valve 5 in the maximum opening position intersects the further plane A, containing the two axes of rotation Y, Y’, in an intermediate position between said two axes of rotation Y, Y’.
  • both the rotation shaft 14 and the rotation shaft 16 are placed radially outside of the bottom opening 4, preferably having a diameter lower than 1 ,5 meter.
  • the handling lever 6 has a base 7 fixed to the seal valve 5, in particular fixed to the external bottom of the seal valve 5, and two side arms 8 arranged at opposite sides with respect to the hopper 2.
  • the two side arms 8 protrude from the ends of the base 7.
  • the closing/opening device is provided with:
  • first actuator 11 for actuating the rotation shaft 14 so as to transmit a linear movement to the seal valve 5
  • second actuator 12 for actuating the rotation shaft 16 so as to transmit a pivoting movement to said seal valve 5.
  • the second end 10 of the two side arms 8 is proximal to the base 7, whereas the first end 9 of the two side arms 8 is distal from the base 7.
  • the handling lever 6 has an U-shape, the base 7 of the U-shape being fixed to the seal valve 5 and the two side arms 8 having a F-shape or a C-shape.
  • the two side arms 8 parallel to each other, are arranged on planes transverse, for example orthogonal, to the plane of the base 7 of the U-shape.
  • the two side arms 8 are symmetrically arranged with respect to a plane orthogonal to an longitudinal axis defined by the base 7.
  • the base 7 of the U-shape has an inner surface fixed to a lower outer surface of the seal valve 5.
  • the seal valve 5 has a sealing disc which is intended for closing or opening the bottom opening 4 of the material hopper 2 and is arranged above the throat of a blast furnace.
  • a sealing disc which is intended for closing or opening the bottom opening 4 of the material hopper 2 and is arranged above the throat of a blast furnace.
  • loose material especially ores and burden material, is directed into the throat of the blast furnace through the bottom opening 4 ( Figures 5, 7b).
  • the bottom opening 4 In the closed position, the bottom opening 4 is closed off in gas-tight manner by the sealing disc ( Figures 1 -3).
  • a sealing seat (not shown) having sealing elements.
  • On the rim of the sealing disc there is provided a corresponding circumferential sealing surface (not shown), which in the closed position of the seal valve 5 cooperates with the sealing seat to provide sealing.
  • the first linkage comprises
  • first lever 15 being rigidly fixed at a first end thereof to the rotation shaft 14 and hinged at a second end thereof to the first end 9 of a respective side arm 8;
  • rotation angle of rotation shaft 14 and first levers 15 has a maximum value of 10°.
  • Each first lever 15 is hinged at the second end thereof to the first end 9 of the respective side arm 8 by means of a respective pin 24.
  • the second linkage comprises
  • each second lever 18 being rigidly fixed at a first end thereof to the rotation shaft 16;
  • each third lever 19 being hinged at a first end thereof to a second end of a respective second lever 18 and hinged at a second end thereof to the second end 10 of a respective side arm 8;
  • rotation angle of rotation shaft 16 and second levers 18 has a maximum value of 90°.
  • Each third lever 19 is hinged at the first end thereof to the second end of a respective second lever 18 by means of a respective pin 25, and is hinged at the second end thereof to the second end 10 of the respective side arm 8 by means of a respective pin 26.
  • the first actuator 1 1 and the second actuator 12 are linear actuators.
  • the first actuator 1 1 has a first stroke shorter than a second stroke of the second actuator 12.
  • the first actuator 1 1 has a first stroke having a maximum value of 100 mm, whereas the second actuator 12 has a second stroke having a maximum value of 700 mm.
  • first actuator 1 1 can have a rod 22 connected to the connecting lever 13 by means a pin 23, whereas the second actuator 12 can have a rod 27 connected to the connecting lever 17 by means a pin 28 ( Figures 6a, 6b).
  • first actuator 1 1 and the second actuator 12 are rotating actuators, for example motors, adapted to transmit the rotation to the rotation shaft 14 and the rotation shaft 16, respectively.
  • the first levers 15 rotate together with the rotation shaft 14 so that a linear movement upwards or downwards is transmitted, by means of the pins 24, to the first ends 9 of the side arms 8 and, thus, to the handling lever 6 integrally fixed to the seal valve 5.
  • a further rotation of the first levers 15 occurs by means the pins 24.
  • the further motor transmits a rotation to the rotation shaft 16 in a first direction
  • a further rotation downwards of the first levers 15 occurs.
  • the further motor transmits a rotation to the rotation shaft 16 in a second direction, opposite to said first direction, during this pivoting movement a further rotation upwards of the first levers 15 occurs.
  • the inclination angle of the side arms 8 with respect to the longitudinal axis X of the bottom opening 4 is higher than 45°, preferably in the range of 55-90°, for example about 70° (Figure 5).
  • this inclination angle is defined between a plane orthogonal to the sheet of Figure 5 and containing the longitudinal axis X and a plane Z containing the axes defined by the two side arms 8, also said plane Z being orthogonal to the sheet of Figure 5.
  • Figure 6a shows the seal valve 5 in the closing position, that means the position in which the bottom opening 4 is closed off in gas-tight manner by the sealing disc of the seal valve 5.
  • the method for opening the bottom opening 4 comprises the following steps:
  • the method for closing the bottom opening 4 comprises the following steps:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)

Abstract

Selon l'invention, un appareil de chargement supérieur (1), destiné à charger un matériau dans un haut fourneau, comprend : une trémie à matériau (2) qui présente une ouverture supérieure (3) et une ouverture inférieure (4) délimitant un axe longitudinal (X); un dispositif de fermeture/ouverture pour fermer ou ouvrir ladite ouverture inférieure (4). Ledit dispositif de fermeture/ouverture comprend : un clapet obturateur (5); au moins un levier de manipulation (6) relié audit clapet obturateur (5) pour le déplacer d'une position de fermeture à une position d'ouverture maximale ou inversement; un premier arbre de rotation (14) relié à au moins une première partie du levier de manipulation (6) pour l'actionner; un second arbre de rotation (16) relié à au moins une seconde partie du levier de manipulation (6) pour l'actionner. Le premier arbre de rotation (14) et le second arbre de rotation (16) présentent des axes de rotation (Y, Y') parallèles l'un à l'autre et perpendiculaires à un premier plan comportant l'axe longitudinal (X). Le clapet obturateur (5), dans ladite position d'ouverture maximale, croise un second plan (A) délimité par les axes de rotation (Y, Y') du premier arbre de rotation (14) et du second arbre de rotation (16), dans une position intermédiaire située entre lesdits axes de rotation.
PCT/EP2019/074507 2018-09-14 2019-09-13 Appareil de chargement supérieur pour charger un matériau dans un haut fourneau et procédé d'ouverture et de fermeture d'une ouverture inférieure d'une trémie d'un appareil de chargement de haut fourneau WO2020053397A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800008626 2018-09-14
IT102018000008626 2018-09-14

Publications (1)

Publication Number Publication Date
WO2020053397A1 true WO2020053397A1 (fr) 2020-03-19

Family

ID=64316920

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/074507 WO2020053397A1 (fr) 2018-09-14 2019-09-13 Appareil de chargement supérieur pour charger un matériau dans un haut fourneau et procédé d'ouverture et de fermeture d'une ouverture inférieure d'une trémie d'un appareil de chargement de haut fourneau

Country Status (1)

Country Link
WO (1) WO2020053397A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10339582A (ja) * 1997-06-05 1998-12-22 Ishikawajima Harima Heavy Ind Co Ltd 原料予熱槽の頂部開閉ゲート装置
WO2017050313A1 (fr) * 2015-09-24 2017-03-30 TDCo GmbH Trappe de fermeture pour gueulard

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10339582A (ja) * 1997-06-05 1998-12-22 Ishikawajima Harima Heavy Ind Co Ltd 原料予熱槽の頂部開閉ゲート装置
WO2017050313A1 (fr) * 2015-09-24 2017-03-30 TDCo GmbH Trappe de fermeture pour gueulard

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