EP0513529A1 - Vorrichtung zur Beschickung eines Schachtofens - Google Patents

Vorrichtung zur Beschickung eines Schachtofens Download PDF

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Publication number
EP0513529A1
EP0513529A1 EP92106210A EP92106210A EP0513529A1 EP 0513529 A1 EP0513529 A1 EP 0513529A1 EP 92106210 A EP92106210 A EP 92106210A EP 92106210 A EP92106210 A EP 92106210A EP 0513529 A1 EP0513529 A1 EP 0513529A1
Authority
EP
European Patent Office
Prior art keywords
chute
axis
cap
installation according
pivoting
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
EP92106210A
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English (en)
French (fr)
Other versions
EP0513529B1 (de
Inventor
Pierre Mailliet
Emile Lonardi
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0513529A1 publication Critical patent/EP0513529A1/de
Application granted granted Critical
Publication of EP0513529B1 publication Critical patent/EP0513529B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to a loading installation of a shaft furnace, comprising a rotary and pivoting distribution chute, suspended from the head of the furnace, means for driving the chute, consisting of first and second bearing crowns designed to rotate the chute around the vertical axis of the oven and modify its angle of inclination relative to this axis, by pivoting about its horizontal suspension axis, means for actuating, independently of one of the other, the two bearing rings, a central hopper fitted with a lower sealing valve, two horizontal crosspieces extending parallel on either side of the chute, inside said second ring from which the said crosspieces are integral, the chute being removably supported by two lateral flanges each comprising a support pin housed each in a bearing of each of the said sleepers.
  • a loading installation of this kind is known from document DE-A1-3928466.
  • This known installation has, among other things, the advantage of allowing the dismantling of its chute through its drive mechanism and of being able to be easily adaptable to existing blast furnaces, replacing a conventional bell loading installation.
  • the object of the present invention is to provide an improved loading installation of this kind, which is more compact and allows more efficient and more reliable transmission of the pivoting forces on the distribution chute, and vice versa to reduce the efforts on the gears under the effect of the weight of the chute.
  • the installation proposed by the present invention is essentially characterized in that the two flanges consist of the legs of a stirrup in the shape of a "U" extending transversely by with respect to the chute, in that said first crown comprises a cap in the form of a sector of spherical surface whose center of curvature is at the intersection of said vertical axis and said horizontal axis and which is provided with an elongated groove with parallel edges extending along a meridian of said cap, in that one of said flanges is extended, in the direction of the cap by an arm, the end of which pivots in a sliding shoe in said groove and in that the pivot axis between said arm and the shoe, or vice versa passes through the center of curvature of said cap.
  • the sealing valve which seals between the hopper and the interior of the oven is preferably actuated by a drive mechanism with axial and rotary movements known per se.
  • this drive mechanism is arranged so that its axis passes through the center of curvature of the cap. This arrangement allows a minimum space required for the operation of the sealing valve since the latter, when it opens and closes, performs a circular movement concentric with the cap, so that the movement thereof does not interfere with the operation of the sealing valve and vice versa.
  • a supply tube is suspended below said hopper and enters axially into the open cylindrical space generated by the rotation of the cap around the vertical axis.
  • This tubing is preferably cooled by a water cooling coil passing through the wall of the tubing.
  • FIGS. 1 and 3 represent in FIGS. 1 and 3 the head of a blast furnace, on the upper flange of which is fixed a casing 22 containing a mechanism for driving a distribution chute 24 to rotate the latter around the vertical central axis X and to modify its inclination relative to this axis, by pivoting around its horizontal suspension axis Y.
  • a housing 26 surmounted, in turn, by a central feed hopper 28.
  • This hopper can be isolated from the housing 26 by a sealing valve 30 cooperating with a directory seat 32, fixed on a flange 34, between the housing 26 and the hopper 28.
  • the drive mechanism of the chute 24 essentially comprises a first and a second rolling groups respectively constituted by two rings 36, 38 integral with the wall of the casing 22 and by two toothed rolling rings 40, 42 gravitating around the rings 36 and 38 by means of known rolling means such as balls or rollers.
  • the two toothed crowns 40, 42 are independently actuated by pinions not shown and which are part of a drive system allowing either to rotate the two crowns 40, 42 in synchronism, or to delay or accelerate the crown 40 relative to the crown 42.
  • Each of the two rings 40, 42 comprises an annular support profile 40a, 42a respectively arranged coaxially one above the other.
  • Two parallel horizontal crosspieces 44, 46 are welded inside the support profile 42a of the lower ring 42 at a sufficient distance from the central axis X to allow the suspension of the chute 24.
  • the suspension of this chute 24 is carried out by means of lateral flanges 48a, 48b, each of these flanges being provided with an external pin 52, 54 which are pivotally supported in bearings provided in each of the crosspieces 44, 46.
  • the inclination of the chute 24 with respect to the vertical axis X can therefore be modified by pivoting the pins 52, 54 around their horizontal suspension axis Y in the crosspieces 44, 46.
  • the installation proposed by the present invention differs from the known installation by the transmission of the movement of the rolling ring 40 for the purpose of pivoting the trough 24 about its horizontal axis of suspension Y.
  • the two lateral flanges 48a and 48b are not independent flanges but constitute, in fact, the legs of a stirrup 48 in the shape of a "U" extending transversely relative to the trough 24 (see also FIGS. 5 and 6).
  • stirrup 48 can be dismantled as a block with the flanges 48a and 48b after dismantling the chute 24. It is therefore not necessary, code in the known installation, to dismantle the flanges separately and having, in addition, to identify and fix the position of one flange relative to the other.
  • the annular profile 40a of the ring gear 40 has, on an arc of about 120 °, a cylindrical sector 56 extending upward into the housing 26.
  • This cylindrical sector 56 is covered by a cap 58 in the form of a spherical surface sector whose center of curvature O is at the intersection of the vertical axis X and the horizontal axis Y of pivoting of the chute 24.
  • This cap 58 has a groove elongated 60 or cut, with parallel edges, the longitudinal axis of which extends along a meridian of the spherical surface of the cap 58.
  • This groove 60 is used for guiding and sliding a shoe 62 provided at the end of a lever 64 which is integral with the stirrup 48 and which can be formed by the extension of one of the flanges 48a or 48b.
  • the end of this lever arm 64 is designed in the form of a pin 66 on which the shoe 62 is housed so that it can pivot by relative to the lever arm 64 and vice versa, around the axis A of the journal.
  • This pivot axis A is oriented, according to one of the features of the invention, so as to pass through the center of curvature O of the cap 58.
  • the shoe 62 simply slides in the groove 60 by friction along the walls. To improve this sliding, it is possible to provide the shoe 62 with a rolling system.
  • the distribution chute 24 rotates around the vertical axis X with a constant inclination to deposit the loading material in circles on the surface of loading.
  • the cap 58 acts on the lever arm 64, making pivot the stirrup 48 about the horizontal axis Y to modify the inclination of the chute 24 relative to the vertical axis X.
  • This pivoting of the lever arm 64 is accompanied by a sliding of the shoe 62 in the groove 60 .
  • FIGs 3 and 4 schematically illustrate three different angular positions of the chute 24 under the action of the cap 58.
  • the position in solid lines is a medium position corresponding to a vertical orientation of the lever arm 64, in which the shoe 62 found in its highest position in the groove 60.
  • the positions in broken lines 24a and 24b of the chute correspond respectively to maximum and minimum inclinations of the chute, the last being the vertical position.
  • these extreme inclinations are obtained from the average inclination by relative rotation of the cap 58 relative to the bearing 42 either in one direction or in the opposite direction and accompanied by a descent of the skate 62 in the groove 60 of the cap 58.
  • the amplitude of rotation of the cap 58 necessary for the pivoting of the chute 24 from the vertical position to that of a maximum inclination 24a is less than 1 / 4 turn.
  • the stirrup 48 the torque of the lever arm 64 is distributed uniformly over the two pins 52 and 54, which, compared to the case where the chute is actuated only on one side, eliminates the overturning torques on the journals. Since the lever arm 64 can be relatively long, the force transmission ratio is all the more favorable. The length of this arm 64 also depends on the height of the sector 56. Furthermore, compared to known mechanisms, that proposed by the present invention offers the advantage that the pivoting force of the chute always acts perpendicular to the arm 64 which whatever the inclination of the chute.
  • the stirrup 48 passes over the chute 24. It is however possible to arrange the stirrup so that it is oriented in the opposite direction, that is to say that 'it passes below the chute 24. In this case it can be designed as a cradle for the upper end of the chute 24.
  • FIG. 7 represents an average inclination of the chute 24, corresponding to the inclination in solid line in FIG. 3.
  • the lever arm 24 occupies its vertical position, the shoe 62 being, therefore, automatically at the top of its travel in the groove 60.
  • the cap 58 is rotated by an angle in the direction of FIG. 8, under the effect of a relative rotation of the crown 40 relative to the crown 42, the lever arm 24 is pivoted in the direction of raising of the chute 24, that is to say towards an increase in the inclination relative to the vertical axis X.
  • This movement is necessarily accompanied by a descent of the shoe 62 in the groove 60 of the dome 58, which is illustrated in Figure 8a.
  • FIG. 9 illustrates the maximum angular offset ⁇ of the cap 58, corresponding to a maximum inclination of the chute 24, for which the shoe 62 is positioned at the bottom of the groove 60.
  • the horizontal size of the cap 58 corresponds substantially to an annular surface equivalent to the projection of the cap 58 in a horizontal plane.
  • a cylindrical space remains available in the center for installing a supply tube 70 guiding the fall of the loading material on the chute 24.
  • This tube 70 can be simply placed on a support ring 74 integral with the flange 34.
  • This tubing is preferably cooled with water, thanks to a cooling coil 72 embedded in a layer of thermal conductive concrete applied around the wall of the tubing. This cooling, in addition to its direct action on the wall of the tubing, protects, among other things, the soft seal of the valve from thermal radiation.
  • FIG. 1 Another advantage is offered by the possibility of using a sealing valve as proposed in document EP-B1-0252342.
  • This document proposes a valve carried by an operating arm actuated by a mechanism with axial and rotary movement and whose axis is inclined relative to the axis of the valve seat.
  • the reference 80 designates such a mechanism for operating the sealing valve 30. This mechanism is fixed to the wall of the housing 26.
  • the operating arm of the valve 30 is constituted by a fork 82 which can be rotated by the mechanism. drive 80 around its operating axis B.
  • the sealing valve 30 is carried by the end of a lever arm 84 pivoting around the end of the fork 82, the other end of the lever arm 84 being actuated in the axial direction by the mechanism 80 to pivot the lever 84 around its point of attachment to the fork 82.
  • the opening of the sealing valve 30 first comprises an axial movement of the mechanism 80 to rotate the lever 84 anticlockwise in order to release the valve 30 from its seat 32. Then the fork 82 is turned around the axis of rotation B to move the valve 30 in a rotary motion to a parking position. Closing the valve, of course, has the same phases in reverse.
  • valve drive mechanism 30 By orienting the valve drive mechanism 30 so that its axis B of rotation of the fork 82 passes through the center O of the cap 58 the sealing valve 30 evolves, during its operation, along a circular curve which is concentric with the cap 58.
  • the valve 30 in the garage position, can occupy the very reduced space between the cap 58 and the wall of the housing 26, while during its operation, it can also move in this space without the valve 30 interfering with the movement of the cap 58 or vice versa.
  • the design of the loading installation according to the present invention does not exclude other advantageous embodiments described in the document DE-A1-3928466.
  • the cooling system of the suspension of the chute and its drive mechanism is adaptable without modifications to the installation according to the present invention.
  • the stirrup 48 according to the present invention it is possible to provide a removable attachment device for the chute as in the aforementioned document.
EP92106210A 1991-05-15 1992-04-10 Vorrichtung zur Beschickung eines Schachtofens Expired - Lifetime EP0513529B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU87938A LU87938A1 (fr) 1991-05-15 1991-05-15 Installation de chargement d'un four a cuve
LU87938 1991-05-15

Publications (2)

Publication Number Publication Date
EP0513529A1 true EP0513529A1 (de) 1992-11-19
EP0513529B1 EP0513529B1 (de) 1996-03-13

Family

ID=19731296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106210A Expired - Lifetime EP0513529B1 (de) 1991-05-15 1992-04-10 Vorrichtung zur Beschickung eines Schachtofens

Country Status (10)

Country Link
US (1) US5299900A (de)
EP (1) EP0513529B1 (de)
JP (1) JP3118314B2 (de)
CN (1) CN1044007C (de)
CA (1) CA2068499A1 (de)
CZ (1) CZ285152B6 (de)
DE (1) DE69208929T2 (de)
LU (1) LU87938A1 (de)
RU (1) RU2060280C1 (de)
UA (1) UA26978C2 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU88396A1 (de) * 1993-08-25 1995-03-01 Wurth Paul Sa Verteilerschurre fuer Schuettgut
LU88456A1 (fr) * 1994-02-01 1995-09-01 Wurth Paul Sa Dispositif de répartition de matières en vrac
US5433573A (en) * 1994-03-10 1995-07-18 Buta; John R. Apparatus for injecting fuel into kilns and the like
LU88494A1 (fr) * 1994-06-08 1996-02-01 Wurth Paul Sa Dispositif de chargement à goulotte rotative pour un four à cuve
PL193490B1 (pl) * 1998-12-30 2007-02-28 Sms Demag Ag Zamknięcie gardzieli dla pieców szybowych
LU91480B1 (en) * 2008-09-12 2010-03-15 Wurth Paul Sa Shaft furnace charging device and corresponding distribution chute
LU91565B1 (en) * 2009-05-07 2010-11-08 Wurth Paul Sa A shaft furnace charging installation having a drive mechanism for a distribution chute.
LU91829B1 (en) * 2011-06-21 2012-12-24 Wurth Paul Sa Distribution chute for a charging device
LU91885B1 (en) * 2011-10-11 2013-04-12 Wurth Paul Sa Blast furnace installation
CN103292594B (zh) * 2011-11-14 2014-09-24 姚立猛 冲天炉的炉体
CN111074030B (zh) * 2020-01-17 2021-05-07 北京科技大学 一种高炉布料系统及方法
CN111074031B (zh) * 2020-01-17 2021-05-07 北京科技大学 一种多储料装置同时布料的高炉布料系统
CN114812189B (zh) * 2022-02-08 2023-10-10 河钢股份有限公司承德分公司 一种烧结机导料溜槽及使用方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2657211A1 (de) * 1976-12-17 1978-07-06 Koelsch Foelzer Werke Ag Vorrichtung zur beschickung eines schachtofens
FR2634544A1 (fr) * 1988-07-25 1990-01-26 Wurth Paul Sa Dispositif de manutention d'une goulotte de distribution d'un four a cuve et mecanisme d'entrainement adapte a ce dispositif
FR2636726A1 (fr) * 1988-09-22 1990-03-23 Wurth Paul Sa Installation de chargement d'un four a cuve

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU59207A1 (de) * 1969-07-31 1969-12-10 Wurth Anciens Ets Paul
LU65312A1 (de) * 1972-05-08 1972-08-23
DE2455767C2 (de) * 1974-11-26 1976-10-21 Demag Ag Vorrichtung zum verteilen des beschickungsgutes in schachtoefen, insbesondere hochdruck-hochoefen
LU80112A1 (de) * 1978-08-16 1979-01-19
DE2927316B1 (de) * 1979-07-06 1980-02-21 Demag Ag Mannesmann Verteilvorrichtung fuer Gichtverschluesse von Schachtoefen,insbesondere fuer Hochofen-Gichtverschluesse
JPS5671783A (en) * 1979-11-13 1981-06-15 Ishikawajima Harima Heavy Ind Stock distributor for vertical furnace
LU83370A1 (fr) * 1981-05-18 1983-03-24 Wurth Paul Sa Dispositif de commande du mouvement d'une goulotte oscillante et installation de chargement d'un four a cuve equipe d'un tel dispositif
LU84303A1 (fr) * 1982-07-28 1984-03-22 Wurth Paul Sa Procede et dispositif de commande du mouvement d'une goulotte oscillante et application a une installation de chargement d'un four a cuve
LU86495A1 (fr) * 1986-06-30 1988-01-20 Wurth Paul Sa Dispositif de fermeture d'une ouverture centrale superieure d'une enceinte et application a une tremie de stockage d'une installation de chargement d'un four a cuve
SU1527273A1 (ru) * 1987-06-25 1989-12-07 Государственный Союзный Институт По Проектированию Металлургических Заводов "Гипромез" Распределитель шихты загрузочного устройства доменной печи
SU1678845A1 (ru) * 1989-06-01 1991-09-23 Государственный союзный институт по проектированию металлургических заводов Распределитель шихты загрузочного устройства доменной печи

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2657211A1 (de) * 1976-12-17 1978-07-06 Koelsch Foelzer Werke Ag Vorrichtung zur beschickung eines schachtofens
FR2634544A1 (fr) * 1988-07-25 1990-01-26 Wurth Paul Sa Dispositif de manutention d'une goulotte de distribution d'un four a cuve et mecanisme d'entrainement adapte a ce dispositif
FR2636726A1 (fr) * 1988-09-22 1990-03-23 Wurth Paul Sa Installation de chargement d'un four a cuve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
soviet inventions illustrated, section m24,week 9024,publie 25-07-90. derwent publications,london,gb *

Also Published As

Publication number Publication date
US5299900A (en) 1994-04-05
LU87938A1 (fr) 1992-12-15
UA26978C2 (uk) 2000-02-28
EP0513529B1 (de) 1996-03-13
CZ285152B6 (cs) 1999-05-12
JP3118314B2 (ja) 2000-12-18
CA2068499A1 (en) 1992-11-16
CN1044007C (zh) 1999-07-07
RU2060280C1 (ru) 1996-05-20
CN1066684A (zh) 1992-12-02
DE69208929D1 (de) 1996-04-18
DE69208929T2 (de) 1996-07-25
JPH05179326A (ja) 1993-07-20
CS148092A3 (en) 1992-11-18

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