EP0764220B1 - Dispositif de chargement a goulotte rotative pour un four a cuve - Google Patents

Dispositif de chargement a goulotte rotative pour un four a cuve Download PDF

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Publication number
EP0764220B1
EP0764220B1 EP95920800A EP95920800A EP0764220B1 EP 0764220 B1 EP0764220 B1 EP 0764220B1 EP 95920800 A EP95920800 A EP 95920800A EP 95920800 A EP95920800 A EP 95920800A EP 0764220 B1 EP0764220 B1 EP 0764220B1
Authority
EP
European Patent Office
Prior art keywords
mounting flange
housing
deformable
chute
ring
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
Application number
EP95920800A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0764220A1 (fr
Inventor
Emile Lonardi
Guy Thillen
Georges Reuter
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 EP0764220A1 publication Critical patent/EP0764220A1/fr
Application granted granted Critical
Publication of EP0764220B1 publication Critical patent/EP0764220B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the present invention relates to a chute loading device rotary kiln, comprising a support structure overhanging the shaft furnace, a lock hopper supported by this support structure, a chute drive housing which is tightly connected to a side to the lock hopper and on the other side to a mounting flange to be fixed rigidly in the shaft oven, and at least one large rolling ring diameter mounted in the housing to support said rotary chute.
  • the chute is suspended in a rotating cage, which is supported in the housing by means of a ring large diameter bearing.
  • the rotating cage defines the lower part of a axial flow channel connecting the lock hopper to the chute, and the ring large diameter bearing externally surrounds this axial channel of flow.
  • the bearing ring is designed to take up an axial force and a significant changeover moment. It includes two coaxial rings connected by rolling elements.
  • One of the two rings is rigidly fixed to the rotating cage, while the other ring is rigidly fixed to a plate of support integrated in the housing.
  • the housing itself has a flange lower using which it is rigidly supported on the mounting flange fixed to the shaft oven.
  • the lock hopper is tightly connected to the casing, either rigidly. either through a compensator.
  • the weight of the chute is transmitted rigidly through the support plate and the housing on the mounting flange from the shaft oven.
  • the problem underlying the present invention is to increase the duration life of the rolling ring in a device of the kind described in the preamble.
  • a certain merit of the present invention is to have understood that the flange assembly rigidly fixed to the shaft furnace undergoes deformations asymmetrical that affect the life of the bearing ring.
  • These deformations of the mounting flange of the shaft furnace are due on one side to the internal pressure in the shaft oven and on the other side at thermal expansion of the shaft furnace.
  • Their asymmetry is probably due to the fact the dome of the shaft furnace, to which the mounting flange is attached rigidly, is a non-symmetrical structure which presents for example several important local openings. Therefore, this dome deforms asymmetrically under the combined effect of internal pressure and constraints of thermal origin. In addition, this dome is not necessarily heated uniformly.
  • the internal refractory lining may be less important in some places, which naturally produces heating asymmetric of the dome and therefore, in the wall of the dome, a field asymmetric constraints of thermal origin.
  • the dome undergoes asymmetric deformations which necessarily generate deformations asymmetrical mounting flange attached to the dome.
  • the deformable connecting element integrated in the chain of rigid elements connecting the mounting flange of the oven to tank with the rolling ring supporting the rotating chute, absorbs a much of the asymmetric deformation of the front mounting flange that these deformations cannot affect the geometry of the ring rolling.
  • the connecting element deformable is connected between a mounting plate and a liner outside of the housing.
  • the bearing ring is fixed on this plate mounting and the outer casing of the casing is fixed directly to the flange of mounting fixed to the oven.
  • the deformations of this flange are taken up in mainly by the deformable connecting element.
  • the absorption effect obtained is improved if its support plate is provided with reinforcements giving it a much higher rigidity than that of the deformable element.
  • the element of deformable link is constituted by a first compensator which connects the casing containing said bearing ring, in a sealed manner to the flange of mounting the oven, while allowing relative movements between the casing and the oven furnace mounting flange.
  • the housing is then supported either directly by a rigid support structure, or by the lock hopper. The latter is supported directly or indirectly by a structure of rigid support. Any rigid connection between the mounting flange and the housing supporting the bearing ring is therefore deleted.
  • the connecting element deformable is connected directly between an integrated mounting plate in the housing and the bearing ring. This solution naturally ensures better protection of the bearing ring, because of deformations of the support plate are also absorbed.
  • the connecting element deformable is preferably a ring whose annular wall defines a deformable loop.
  • the connecting element deformable according to the invention directly supports the casing on the flange mounting.
  • This solution differs from the first execution described above by the fact that the deformable connecting element is capable of transmitting the weight of the housing / chute assembly directly on the mounting flange of the shaft furnace, whereas the compensator in the first execution is used exclusively for connect the housing tightly to the mounting flange of the shaft furnace and does not intervene in the recovery of the weight of the housing / chute assembly.
  • the reference 10 marks overall a tank oven. This is for example a blast furnace, but it could also be another type of oven which can be fitted with a chute rotary.
  • the tank furnace shown comprises a cylindrical body 12 and a terminal dome 14.
  • this terminal dome 14 is integrated an opening of load 16 which is surrounded by a mounting flange 18, called in the continued mounting flange 18 of the shaft furnace 10.
  • This mounting flange 18 is rigidly attached to dome 14 and is therefore exposed to all deformation of the last.
  • the load material flows from the lock hopper 26 through the metering member 28 and the casing 30 on the rotary chute 32.
  • the latter distributes the loading material on the loading surface marked by the reference 34.
  • the casing 30 contains the means for suspending the chute as well as the training means thereof. Different types of means suspension and drive of chute 32 are described in detail in documents cited in the introductory part of this description. Help of Figure 3 we will only provide here a brief description of a mode possible execution of these suspension and drive means of the chute.
  • the chute 32 is supported by a rotary cage 36 by means of two lateral pivots 38 'and 38 ".
  • the rotating cage 36 forms the lower part of a channel supply 39 which is coaxial with the axis of the oven 10.
  • This cage 36 is supported in the casing 30 by means of a bearing ring 40 of large diameter which surrounds the supply channel 39 and which defines the axis of rotation vertical of the cage 36.
  • This rolling ring 40 is an element which has proven for the rotary suspension of chute 32.
  • the outer ring 44 which supports the rotary cage 36, while the inner ring 42 is fixed on a support plate 48 of the casing 30.
  • the outer ring 44 supports then a gear toothing 50 which cooperates with a first pinion (not shown) a drive mechanism (not shown) to train in rotation of the cage 36 and, consequently, the chute 32 around the axis of the tank 10.
  • a swivel mechanism allows you to change the angle of inclination of the chute 32 when the latter is rotating.
  • This mechanism includes the most often a second large diameter bearing ring 52, the inner ring 54 is fixed to the support plate 48.
  • the outer ring 56 of this second rolling ring is provided with a gear teeth 58 which cooperates with a second pinion (not shown) of a mechanism training.
  • This drive mechanism is capable of giving the ring exterior 56 a rotational movement which may have a phase shift variable angular with respect to the rotational movement of the cage 36.
  • a mechanism 60 mechanically connected between this outer ring 56 and a at least pivots 38 ', 38 "makes it possible to transform this phase shift or offset angular in a pivoting of the chute around the two pivots 38 'and 38 ".
  • pivoting mechanisms are described in more detail in the documents mentioned in the introduction to this description.
  • At least one deformable connecting element is integrated into the chain of rigid elements mechanically connecting the ring bearing 40 supporting the rotary chute 32 to the mounting flange 18 of the shaft furnace, so that a rigid transmission of deformations between the mounting flange 18 and the rolling ring 40 is avoided.
  • Figures 1 to 5 show several advantageous embodiments of the invention.
  • a compensator 70 is connected between the flange 18 of the dome 14 and the counter-flange 18 'of the casing 30.
  • This compensator 70 for example a metallic bellows compensator, guarantees watertightness between the casing 30 and the shaft furnace 10, while allowing relative movement of the two flanges 18 and 18 '.
  • the casing 30 is supported by the hopper assembly lock 26 / metering member 28.
  • This assembly 26/28 is supported itself, as described above, by the support structure 22.
  • the compensator 70 must therefore essentially fulfill a function seal and must in no way support the weight of the housing assembly 30 / chute 32.
  • the dome 14 can deform asymmetrically, for example under the influence of a field of asymmetric temperature or internal pressures acting on the dome, without that these deformations affect the casing 30.
  • the integrated bearing ring 40 in the casing 30 is therefore protected from tensions induced by the asymmetric deformations of the dome 14.
  • the device according to Figure 2 differs from the device of Figure 1 by the fact that the casing 30 is supported directly by the support structure 22.
  • a second compensator 72 is connected between the hopper assembly lock 26 / shutter member 28 and the casing 30.
  • This embodiment has the advantage that the casing 30, which is generally hotter than the hopper lock 26, 28, can expand almost freely on both sides.
  • this second compensator is recommended if continuous weighing is to be carried out of the lock hopper via integrated load cells in the supports of the hopper 26 on the support structure 22.
  • FIG. 3 shows a preferred embodiment of the invention, in which the deformable connecting element is integrated in the casing 30.
  • This deformable connecting element more precisely comprises a ring deformable 80 connected between the support plate 48 of the casing and a outer jacket 82 of the casing 30.
  • This modified casing 30 can be rigidly mounted on the mounting flange 18 of the shaft furnace 10. Indeed, the deformations of this flange 18 affect the wall 82 of the casing 30, but not or little the plate support 48. It will be noted that the latter is advantageously reinforced by boxes 84 which increase its rigidity. Indeed, the higher the plate support 48 is rigid with respect to the deformable ring 80, the better deformation of the outer jacket 82 will be taken up by the ring deformable.
  • a high rigidity of the support plate 48 amplifies by therefore the effect of absorbing deformations of the deformable ring 80 and thus guarantees that the support plate 48 does not deform either in its plane or perpendicular to this plane.
  • a deformation of the dome 14 induced in the ring 42 of the rolling ring 40, which is fixed to the support plate 48 hardly any deformations affecting the circularity and the flatness of this ring 42.
  • the deformable ring 80 is for example a ring having a section open in "U".
  • One of the branches then constitutes a fixed flange, for example welded to the wall 82; while the other branch constitutes a fixed flange, by example welded to the support plate 48.
  • the ring 80 is, as we have seen more high, dimensioned to be much less rigid than the plate support 48. It follows that the deformations of the wall 82 produce a deformation of section "U" of ring 80 and do not affect the shape of the plate 48.
  • Figure 4 also shows an embodiment in which the element of deformable link is integrated in the casing 30.
  • the outer casing 30 and support plate 48 are assembled more or less rigidly.
  • Between the support plate 48 and the ring bearing 40 is connected against a deformable sleeve 90. The latter absorbs any deformation of the support plate 48 without transmit significant stresses to the bearing ring 40.
  • the casing modified from Figure 4 can also be rigidly mounted on the flange 18 of the dome 14.
  • Figure 5 shows an execution of a deformable connecting element 100 which can be integrated between the casing 30 and the dome 14 and which has the particularity of being able to transmit the weight of the casing 30 / chute assembly 32 on the dome 14.
  • the deformable element 100 comprises a lower flange 102, fixed to the dome 14, and a mounting flange 104, supporting the casing 30.
  • the two flanges are 102 and 104 are connected by a metal wall 106 deformable which forms an open loop inwards. It will be noted that this loop preferably has the shape of a lyre.
  • This metal wall 106 is dimensioned so as to be able to transmit the weight of the housing assembly 30 / chute 32 of the mounting flange 104 on the lower flange 102, while allowing a relative horizontal and / or vertical displacement of the two flanges 102 and 104.
  • stops 108 and 110 have been provided in order to avoid excessive relative movements of the two flanges 102 and 104, which could cause plastic deformation of the metal wall 106.
  • stops 108 and 110 have been provided. avoid excessive compression of the deformable element 100.
  • the elements 110 avoid too great an extension, as well as a excessive horizontal displacement of the two flanges 102 and 104.
  • the purpose of the tie rods 110 is in particular to avoid an extension excessive axial of the loop formed by the wall 106 under the effect of the internal pressure in the oven (bottom effect).
  • Figure 6 shows a detail of a preferential execution of the element deformable 100. It can be seen that the loop formed by the wall 106 is entirely filled with a material 112. It is an insulating and compressible material, for example rock wool. An annular screen 114 closes the opening of the loop, without interfering with the deformation thereof.
  • This element execution deformable 100 has the advantage that the deformable wall 106 is protected against excessive heating, which would negatively influence its properties elastic. In addition, it is excluded that the cavity inside the loop fills with non-compressible materials, which could hinder deformation of the wall 106.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Blast Furnaces (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Vending Machines For Individual Products (AREA)
  • Heat Treatment Of Articles (AREA)
  • Forging (AREA)
  • Unwinding Of Filamentary Materials (AREA)
  • Tunnel Furnaces (AREA)
  • Rolling Contact Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
EP95920800A 1994-06-08 1995-05-05 Dispositif de chargement a goulotte rotative pour un four a cuve Expired - Lifetime EP0764220B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU88494A LU88494A1 (fr) 1994-06-08 1994-06-08 Dispositif de chargement à goulotte rotative pour un four à cuve
LU88494 1994-06-08
PCT/EP1995/001704 WO1995033858A1 (fr) 1994-06-08 1995-05-05 Dispositif de chargement a goulotte rotative pour un four a cuve

Publications (2)

Publication Number Publication Date
EP0764220A1 EP0764220A1 (fr) 1997-03-26
EP0764220B1 true EP0764220B1 (fr) 1998-08-12

Family

ID=19731476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95920800A Expired - Lifetime EP0764220B1 (fr) 1994-06-08 1995-05-05 Dispositif de chargement a goulotte rotative pour un four a cuve

Country Status (20)

Country Link
US (1) US5738822A (xx)
EP (1) EP0764220B1 (xx)
JP (1) JP3657987B2 (xx)
KR (1) KR100322944B1 (xx)
CN (1) CN1041639C (xx)
AT (1) ATE169685T1 (xx)
AU (1) AU2612595A (xx)
BR (1) BR9508356A (xx)
CZ (1) CZ284436B6 (xx)
DE (1) DE69504068T2 (xx)
ES (1) ES2122618T3 (xx)
LU (1) LU88494A1 (xx)
PL (1) PL179703B1 (xx)
RO (1) RO116415B1 (xx)
RU (1) RU2127318C1 (xx)
SK (1) SK281738B6 (xx)
TW (1) TW376411B (xx)
UA (1) UA39901C2 (xx)
WO (1) WO1995033858A1 (xx)
ZA (1) ZA954292B (xx)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1046552C (zh) * 1997-06-13 1999-11-17 僧全松 钢丝绳传动的高炉炉顶溜槽布料器
DE10334417A1 (de) * 2003-06-20 2005-01-05 Z & J Technologies Gmbh Ofenkopf bzw. Gichtverschluß
ITMI20050626A1 (it) 2005-04-13 2006-10-14 Technit Compagnia Tecnica Inte Apparato per la misura e il controllo dell'alimentazione di materiale di carica o rottame ad un forno e relativo procedimento
CN201634694U (zh) * 2010-03-10 2010-11-17 北京科技大学 一种水冷水封型高炉无料钟炉顶传动箱
LU91716B1 (en) * 2010-08-06 2012-02-07 Wurth Paul Sa Distribution chute
LU91885B1 (en) * 2011-10-11 2013-04-12 Wurth Paul Sa Blast furnace installation
CN104976891B (zh) * 2014-04-02 2017-02-15 中国二十冶集团有限公司 一种先侧后中的退火炉炉辊安装调整施工方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1406976A (fr) * 1964-09-08 1965-07-23 Demag Ag Procédé et dispositifs de chargements complémentaires pour haut fourneau
LU58146A1 (xx) * 1968-03-08 1969-07-07
LU59207A1 (xx) * 1969-07-31 1969-12-10 Wurth Anciens Ets Paul
LU66430A1 (xx) * 1972-11-08 1973-02-05
JPS5111014B2 (xx) * 1973-01-31 1976-04-08
FR2230246A5 (en) * 1973-05-16 1974-12-13 Delattre Levivier Rotating chute charger for blast or shaft furnaces - with all working parts sealed in annular chamber for protection against hot gas and dust
LU84000A1 (fr) * 1982-03-10 1983-11-17 Wurth Paul Sa Installation d'alimentation d'un four a cuve
SU1148870A1 (ru) * 1983-11-22 1985-04-07 Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Им.Л.И.Брежнева Загрузочное устройство доменной печи
LU85811A1 (fr) * 1985-03-15 1986-10-06 Wurth Paul Sa Installation de chargement d'un four a cuve
AT394631B (de) * 1988-07-25 1992-05-25 Wurth Paul Sa Handhabungsvorrichtung fuer eine verteilerschurre eines schachtofens, und an diese vorrichtung angepasster antriebsmechanismus
LU87341A1 (fr) * 1988-09-22 1990-04-06 Wurth Paul Sa Installation de chargement d'un four a cuve
LU87938A1 (fr) * 1991-05-15 1992-12-15 Wurth Paul Sa Installation de chargement d'un four a cuve

Also Published As

Publication number Publication date
LU88494A1 (fr) 1996-02-01
JP3657987B2 (ja) 2005-06-08
CZ284436B6 (cs) 1998-11-11
UA39901C2 (uk) 2001-07-16
TW376411B (en) 1999-12-11
JPH10501026A (ja) 1998-01-27
SK281738B6 (sk) 2001-07-10
PL317483A1 (en) 1997-04-14
PL179703B1 (pl) 2000-10-31
ES2122618T3 (es) 1998-12-16
RU2127318C1 (ru) 1999-03-10
SK157096A3 (en) 1997-07-09
DE69504068D1 (de) 1998-09-17
CN1041639C (zh) 1999-01-13
EP0764220A1 (fr) 1997-03-26
CN1149890A (zh) 1997-05-14
CZ357096A3 (en) 1997-04-16
AU2612595A (en) 1996-01-04
DE69504068T2 (de) 1999-02-25
KR970703435A (ko) 1997-07-03
RO116415B1 (ro) 2001-01-30
WO1995033858A1 (fr) 1995-12-14
US5738822A (en) 1998-04-14
BR9508356A (pt) 1997-10-28
ZA954292B (en) 1996-04-16
KR100322944B1 (ko) 2002-04-17
ATE169685T1 (de) 1998-08-15

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