EP1034310B1 - Procede pour refroidir un dispositif de chargement d'un four a cuve - Google Patents

Procede pour refroidir un dispositif de chargement d'un four a cuve Download PDF

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Publication number
EP1034310B1
EP1034310B1 EP98951479A EP98951479A EP1034310B1 EP 1034310 B1 EP1034310 B1 EP 1034310B1 EP 98951479 A EP98951479 A EP 98951479A EP 98951479 A EP98951479 A EP 98951479A EP 1034310 B1 EP1034310 B1 EP 1034310B1
Authority
EP
European Patent Office
Prior art keywords
ring
shaped
process according
annular
cooling
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
EP98951479A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1034310A1 (fr
Inventor
Emile Lonardi
Jean-Jacques Venturini
Giovanni Cimenti
Guy Thillen
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
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Filing date
Publication date
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP1034310A1 publication Critical patent/EP1034310A1/fr
Application granted granted Critical
Publication of EP1034310B1 publication Critical patent/EP1034310B1/fr
Anticipated expiration legal-status Critical
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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 method for cooling a device for loading of a shaft furnace.
  • a device for loading a shaft furnace concerned by the present invention more specifically comprises a carcass support mounted on the furnace head, suspended loading equipment rotatably in the support frame and at least one circuit of cooling carried by rotary loading equipment and powered by an annular rotary coupling device.
  • the loading equipment includes a loading chute suspended in a suspension cage, which is itself suspended in the support frame, so that it can be driven in rotation, and which is crossed by a central supply channel of the chute.
  • This suspension cage also forms a protective screen around the feed channel, which protects the drive devices housed in the support frame, in particular against heat radiation at inside the shaft oven.
  • the distribution chute suspension cage is provided with a cooling circuit. The latter is supplied by a liquid cooling through an annular rotary coupling device arranged around the feed channel of the chute.
  • the connection device comprises a rotating ferrule, integral with the suspension cage, and a fixed ring.
  • This ring is carried by the support frame and the rotating ferrule is adjusted with play in the fixed ring.
  • Two superimposed annular grooves are arranged in the fixed ring so as to face the cylindrical surface external of the rotating shell.
  • Connection pipes of the cooling define mouths in the cylindrical surface outer of the rotating shell opposite the two grooves.
  • Toppings sealing which are mounted along the two edges of each groove, rely on the external cylindrical surface of the rotating shell for the purpose sealing between the rotating ferrule and the fixed ring.
  • Water is flowing therefore by gravity, from a stationary supply line in rotation, in the rotating annular tank, passes by gravity through the cooling coils mounted on the rotating cage, to be collected then in the lower collector stationary in rotation and be evacuated to the outside of the support frame.
  • This circulation of water is under the control of level measurements associated with the annular tank and the collector inferior.
  • the level is adjusted so as to be constantly between a minimum and a maximum level. If the level drops to the minimum level, the feed rate of the tank is increased annular, to ensure proper supply of the coils. If the level rises to the maximum level, the feed rate of the annular tank, in order to avoid an overflow of the annular tank.
  • a disadvantage of the 1982 cooler is that the gases blast furnace come into contact with the cooling water in the tank annular. As these blast furnace gases are highly charged with dust, there are fairly large amounts of dust passing in cooling water. This dust forms sludge in the bin ring, which pass through the cooling coils and risk plug these. In this context it should also be noted that the available pressure to pass the cooling water through the coils is essentially determined by the height difference between the annular tank and lower collector.
  • the present invention reduces the risk of dust entering the cooling.
  • the method according to the invention relates more specifically to a device for loading of a shaft furnace comprising: a support carcass mounted on the furnace head; loading equipment rotatably suspended in the support frame, a cooling circuit carried by the equipment rotary loading so as to be rotated by the latter; so that an annular rotary connection device, this connection device comprising a fixed part and a rotary part, able to rotate with rotary loading equipment, the rotary part being separated from the part fixed by an annular separation slot to allow rotation relative.
  • the fixed part of the connection device is supplied with coolant, which passes through the rotating part of the fitting, where it feeds the cooling circuit, to be evacuated at the outlet of the latter outside the support carcass.
  • the supply of coolant to the swivel joint is carried out so that a leakage flow passes through the annular separation gap to form a liquid seal, this leakage rate then being collected and evacuated outside the support frame, without passing through the cooling.
  • the coolant is used to close the annular separation gap, which must exist between the part rotary and the fixed part of the rotary union to allow rotation and which connects the interior of the cooling circuit with the atmosphere of the oven.
  • the device in most cases, it will be advantageous to provide the device with connection of elements capable of creating an additional pressure drop at the level of the annular separation gap, so that the pressure coolant supply can be significantly more higher than the back pressure prevailing in the support frame, without as much generate too high a leak rate.
  • the invention allows to supply for the first time a cooling circuit of a rotary loading equipment with overpressure. No longer limited by supply pressure point of view, we can obviously create circuits more efficient cooling.
  • the leak rate which passes through the elements capable of creating an additional pressure drop e.g. seals, elastomeric seals, labyrinth seals
  • connection device comprises a block annular integral with the support carcass and delimited by two surfaces cylindrical, as well as an annular channel secured to the loading and delimited by two cylindrical surfaces.
  • the fixed annular block in rotation enters the annular channel so that the surfaces cylindrical juxtaposed delimit two annular spaces which are part of said annular separation slot.
  • the annular channel is advantageously provided with overflow openings connected to discharge pipes leak. To create an additional pressure drop which reduces the flow by leakage when the cooling water supply pressure is increased, we have between the two juxtaposed cylindrical surfaces, below the overflow openings, elastomeric annular seals, by example of lip seals.
  • the annular block secured to the carcass of support advantageously comprises passages making communicate the two annular spaces, so that there is a pressure balance between the two annular spaces.
  • the connection device comprises a ring provided with a fixed rotating annular front surface, as well as a annular channel integral with the loading equipment.
  • the ring is housed in the annular channel so that its frontal annular surface is located opposite an annular surface in the annular channel, a slot annular separating the two annular surfaces juxtaposed.
  • a set of fittings is then placed between the two annular surfaces, to create a additional pressure drop in said annular separation slot.
  • the ring is advantageously mounted so as to be able to undergo a translation parallel to the axis of rotation, so that it can exert some pressure on the set of linings.
  • the ring is worn by compensators, so as to be able to undergo a slight displacement parallel to the axis of rotation.
  • the ring is connected by means of a sliding connection to a fixed annular block, so to be able to slide parallel to the axis of rotation.
  • the annular separation slot forms at least one labyrinth seal.
  • the connection device comprises advantageously an annular block secured to the support carcass and laterally delimited by two stepped annular surfaces, as well as a channel annular secured to the loading equipment and delimited laterally by two annular surfaces stepped in a complementary manner.
  • the annular block then enters the annular channel so that two stepped surfaces juxtaposed cooperate to form a labyrinth seal, which is part of said annular separation slot.
  • the annular channel is advantageously provided with overflow openings connected to pipes of the leakage flow and located above the labyrinth seal, and the block annular integral with the support carcass advantageously comprises passages connecting the two annular spaces.
  • FIG 1 there is shown schematically an installation of loading of a tank furnace provided with a distribution chute 10. This last is rotated around the central axis of the shaft furnace, identified by the reference sign 8.
  • An installation of this type is described in detail by example in US-A-3,880,302. It is important to note, however, that the present invention is generally of interest to any loading installation a shaft furnace comprising loading equipment so suspended to be able to be trained around an axis. It is certainly not limited to an installation of the type described in US-A-3,880,302.
  • the chute 10 is suspended using a suspension device and drive, generally identified by the reference 12, in a carcass of support 14 mounted on the shaft furnace.
  • This device 12 includes a crown toothed 16 used for the rotational drive of a ferrule 18 around a channel central power supply 20 fixed in rotation.
  • the training is done using a engine not shown.
  • the device suspension and drive 12 could further include a mechanism allowing the angular adjustment of the chute 10 by pivoting around a horizontal axis.
  • the support frame 14 delimits laterally with the rotary ferrule 18 an annular chamber 22, in which is housed for example the mechanism pivoting of the chute 10.
  • the rotary ferrule 18 is integral with a cage 24, in which the chute 10 is suspended using pins 26. This cage 24 also acts as a screen between the lower edge of the rotating ferrule 18 and the lower edge 25 of the support frame 14, so as to separate the annular chamber 22 of the interior of the furnace.
  • this cage 24 is provided with several circuits cooling in which a coolant is circulated, by example of water.
  • these circuits are shown schematically by cooling boxes 28, 30, 32, 34. These the latter advantageously contain baffles or tubes (not shown) circulating the cooling water along the walls of the cage 24.
  • the boxes 28, 30, 32, 34 are connected by means of pipes 36, 38 to a device for annular rotary union, generally identified by reference 40. The latter will be described later in more detail using Figures 2 and 3.
  • the evacuation of the water from the cooling circuits 28, 30, 32, 34 is carried out through pipes 41, 42 in an annular collector 44 fixed on the lower edge 25 of the support frame 14. Of the manifold ring 44, the cooling water is finally discharged via pipes discharge 49 outside the support casing 14.
  • the chute 10 itself may be provided with a cooling circuit which is supplied with preferably on the suspension cage 24 through its suspension pins 26. This additional circuit can either be provided with its own connection to the annular rotary coupling device 40, either be connected to one of the circuits cooling 28, 30, 32, 34.
  • the annular rotary coupling device 40 essentially comprises a fixed part connected to a stationary circuit supply (represented by a pipe 44) and a rotating part connected to the cooling circuits 28, 30, 32, 34 via the pipe 36.
  • the rotary part is essentially an annular tank 46, defining an annular channel 47, which is laterally delimited by two coaxial cylindrical surfaces. One of the two cylindrical surfaces is defined by the outer wall of the ferrule 18, the other is defined by a crown 48 surrounding the ferrule 18.
  • the upper edges of the ferrule 18 and the crown 48 slide, during the rotation of the chute 10, each in an annular groove 50, 52 arranged in a fixed element of the outer carcass 14, so as to create a first pair of slots annulars or seals 54, 55 between the fixed part and the rotating part.
  • This first pair of annular slots 54, 55 is intended to slow the penetration of gas loaded with dust in the annular tank 46.
  • the fixed part of the fitting 40 essentially comprises an annular block 56 fixed to the carcass support 14 and externally delimited by two cylindrical surfaces.
  • This annular block 56 is housed in the annular channel 47 so that its outer cylindrical surfaces delimit, together with the surfaces cylindrical juxtaposed with channel 47, a second pair of annular slots 58, 60 between the fixed part and the rotating part of the connection device 40.
  • the annular block 56 has at least one passage opening 62, which communication an annular chamber 64 with an annular channel supply 66, into which the fixed supply pipes 44 open. As shown in a comparison of Figures 9 and 10, the mouths of four supply lines 44 in the annular supply channel 66 are strongly offset from the passage openings 62.
  • the pipes connection 36, 38 of the cooling circuits 28, 30, 32, 34 have a mouth 68 at the bottom of channel 47.
  • the pipes 44 are supplied with cooling.
  • This water passes through the annular channel 66, which it must cross before leaving it through passages 62.
  • the water which crosses the annular channel 66 fulfills the role of a thermal barrier between the central feed channel 20 and the top plate of the carcass support 14 and also guarantees cooling of the suspension device 12.
  • the water flows through the annular chamber 64 of the fixed block 56 in the annular channel 47 of tank 46.
  • the connecting pipes 36, 38 of the cooling 28, 30, 32, 34 At the outlet of these circuits, the water from cooling flows through pipes 41, 42 in the annular manifold 44, which is again fixed in rotation, to be discharged through the pipes discharge 49 outside the carcass 14.
  • the supply of coolant of the rotary coupling 40 is carried out so that that a leakage flow passes through the two annular slots 58, 60 to form there a liquid seal.
  • This leak rate is then collected and discharged outside the support carcass 14 without passing through one of the cooling circuits 28, 30, 32, 34.
  • the means used to collect the leakage rate in the two annular slots 58, 60 are described using Figure 3.
  • In the crown 48 is provided with at least one overflow opening 70.
  • a recess ring 71 in ring block 56 facilitates the flow of the leakage flow at through overflow openings 70.
  • Overflow opening 70 communicates through a channel 72 with a drain pipe 74.
  • each of the two annular slots 58, 60 is equipped with a seal 76, 78, arranged below the level of the overflow opening 70.
  • These seals 76, 78 are preferably elastomeric lip seals, intended to create an additional pressure drop at the two slots annulars 58, 60, so that the liquid supply pressure of cooling may be significantly higher than the back pressure prevailing in the oven, without generating too high a leak rate. It is therefore important to note that in normal operation these seals elastomers 76, 78 are not intended to avoid leaks, but to limit the leakage rate at an acceptable level.
  • annular slot 58 communicates with annular slot 60, via at least one passage 80 through the annular block 56.
  • These passages 80 allow to evacuate the leakage water flow which passes through the slit annular 60.
  • An annular recess 81 in the annular block 56 facilitates the flow of this leakage flow through the passages 80.
  • annular rotary coupling device An alternative embodiment of an annular rotary coupling device is described using Figures 4 and 5.
  • This device differs from the device of Figures 2 and 3 essentially by the fact that the second pair of slots annular 58, 60 is executed in the form of labyrinth seals 58 ', 60'.
  • annular block 56 'into annular channel 47' we entrusted to block 56 'and channel 47' of stepped trapezoidal sections, which cooperate to form the two joints labyrinths 58 ', 60'.
  • annular grooves 84, 86 are connected by at least one passage 70 ', which fulfills the same function as passage 70 of the device of Figures 2 and 3. It will be noted that the leakage rate which is established at through the two labyrinth seals 58 ', 60', cools the parts forming the seals labyrinths, prevents gas from entering the cooling circuit, takes away any solid matter that could seep into the joints mazes and purges sludge of dust that could form in the channel 47 'above the two seals 58', 60 '.
  • FIG. 6 Another variant of a swivel connection device ring is described using Figures 6 and 7.
  • This device differs from device of Figures 2 and 3 essentially by the fact that the second pair of annular slots 58, 60 is replaced by a single annular slot frontal 90, which separates a frontal annular surface from a fixed ring 92 in rotation, of a front annular surface of a ring 94 mounted in the tank 46. Between the two rings 92 and 94 are mounted two linings 96, 98, of so that they define an annular space between them.
  • toppings 96, 98 are intended to create an additional pressure drop at the level of the front slit 90, so that the supply pressure of the liquid from cooling may be significantly higher than the back pressure prevailing in channel 47, without generating too much leakage rate important. It is therefore important to note that in normal operation these fittings 96, 98 are not intended to prevent leaks, but to limit the flow leakage to an acceptable level.
  • the leakage rate which passes below the packings 96, 98 flows into the annular channel 47.
  • the latter is provided at its bottom, in a cavity below the ring 94, of at least one mouth 100 in a discharge pipe 74 ′, which opens out like its equivalent, the evacuation pipe 74 of FIG. 1, in the annular collector 44.
  • the main flow of cooling water passes through openings 102 in the ring 94 in the pipes of connection 36, 38 of the cooling circuits.
  • the ring 92 is connected to a ring block 56 "(which corresponds to the upper part of ring block 56 Figures 2 and 3) using two coaxial compensators 104, 106. These these allow the ring 92 to land on the ring 94 and ensure a some compression of the linings 96, 98. To ensure compression adequate packing 96, 98, in principle acts on the weight of the ring 92.
  • an annular space 108 delimited by the two compensators coaxial 104, 106, the cooling water passes through openings of communication 110 arranged in the ring 92.
  • FIG. 8 An additional variant of a connection device annular rotation is described using Figure 8.
  • This device is distinguished of the device of Figures 6 and 7 essentially by the fact that the compensators 104, 106 are replaced by a sliding annular connection 112, arranged between a ring 92 ′, which is the equivalent of ring 92, and a ring block 56 "', which is the equivalent of ring block 56".
  • the ring 92 ′ is provided with a chamber annular 114, in which is housed the annular end 116 of the block 56 "'.
  • Elastomeric seals 118, 120 improve the tightness of the sliding connection 112.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Joints Allowing Movement (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Blast Furnaces (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Paper (AREA)
  • Furnace Details (AREA)
EP98951479A 1997-11-26 1998-09-28 Procede pour refroidir un dispositif de chargement d'un four a cuve Expired - Lifetime EP1034310B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU90179 1997-11-26
LU90179A LU90179B1 (fr) 1997-11-26 1997-11-26 Procede pour refroidir un dispositif de chargement d'un four a cuve
PCT/EP1998/006153 WO1999028510A1 (fr) 1997-11-26 1998-09-28 Procede pour refroidir un dispositif de chargement d'un four a cuve

Publications (2)

Publication Number Publication Date
EP1034310A1 EP1034310A1 (fr) 2000-09-13
EP1034310B1 true EP1034310B1 (fr) 2001-11-28

Family

ID=19731721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98951479A Expired - Lifetime EP1034310B1 (fr) 1997-11-26 1998-09-28 Procede pour refroidir un dispositif de chargement d'un four a cuve

Country Status (19)

Country Link
US (1) US6544468B1 (pt)
EP (1) EP1034310B1 (pt)
JP (1) JP4199418B2 (pt)
KR (1) KR20010031887A (pt)
CN (1) CN1083888C (pt)
AT (1) ATE209693T1 (pt)
AU (1) AU9747598A (pt)
BR (1) BR9814222A (pt)
CZ (1) CZ298626B6 (pt)
DE (1) DE69802713T2 (pt)
ES (1) ES2166191T3 (pt)
HK (1) HK1030633A1 (pt)
LU (1) LU90179B1 (pt)
PL (1) PL190890B1 (pt)
RU (1) RU2194766C2 (pt)
TW (1) TW383338B (pt)
UA (1) UA52800C2 (pt)
WO (1) WO1999028510A1 (pt)
ZA (1) ZA9810691B (pt)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU90794B1 (fr) 2001-06-26 2002-12-27 Wurth Paul Sa Dispositif de chargement d'un four à cuve
EP1801241A1 (en) * 2005-12-23 2007-06-27 Paul Wurth S.A. A rotary charging device for a shaft furnace equipped with a cooling system
EP1935993A1 (en) * 2006-12-18 2008-06-25 Paul Wurth S.A. A rotary charging device for a shaft furnace
KR101006761B1 (ko) * 2008-03-31 2011-01-10 (주)귀뚜라미동광보일러 증기보일러 부설 과열기 겸 온수가열기
LU91601B1 (en) * 2009-08-26 2012-09-13 Wurth Paul Sa Shaft furnace charging device equipped with a cooling system and annular swivel joint therefore
LU91811B1 (en) * 2011-04-27 2012-10-29 Wurth Paul Sa Load distribution device
LU91844B1 (en) * 2011-07-22 2013-01-23 Wurth Paul Sa Charging device for shaft furnace
LU92469B1 (en) * 2014-06-06 2015-12-07 Wurth Paul Sa Gearbox assembly for a charging installation of a metallurgical reactor
KR102598114B1 (ko) * 2019-02-05 2023-11-02 어플라이드 머티어리얼스, 인코포레이티드 증착 장치 및 증착 장치를 모니터링하기 위한 방법

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU65537A1 (pt) 1972-06-16 1972-10-25
JPS5521577A (en) * 1978-08-03 1980-02-15 Nippon Kokan Kk <Nkk> Method of cooling material loading device at the top of blast furnace
LU80112A1 (pt) 1978-08-16 1979-01-19
LU84521A1 (fr) * 1982-12-10 1984-10-22 Wurth Paul Sa Dispositif de refroidissement d'une installation de chargement d'un four a cuve
LU86818A1 (fr) * 1987-03-24 1988-11-17 Wurth Paul Sa Procede et dispositif de refroidissement d'une installation de chargement d'un four a cuve
LU87341A1 (fr) * 1988-09-22 1990-04-06 Wurth Paul Sa Installation de chargement d'un four a cuve
JPH0311536A (ja) * 1989-06-08 1991-01-18 Nec Kagoshima Ltd 蛍光表示管
JPH0313516A (ja) * 1989-06-13 1991-01-22 Kawasaki Steel Corp ベルレス装入装置用垂直シュート
LU87948A1 (fr) 1991-06-12 1993-01-15 Wurth Paul Sa Dispositif de refroidissement d'une goulotte de distribution d'une installation de chargement d'un four a cuve
JP3048688B2 (ja) * 1991-07-24 2000-06-05 川崎製鉄株式会社 ベルレス炉頂装入装置における漏水検出装置
LU88456A1 (fr) * 1994-02-01 1995-09-01 Wurth Paul Sa Dispositif de répartition de matières en vrac

Also Published As

Publication number Publication date
EP1034310A1 (fr) 2000-09-13
PL190890B1 (pl) 2006-02-28
UA52800C2 (uk) 2003-01-15
CN1279725A (zh) 2001-01-10
JP2001525485A (ja) 2001-12-11
DE69802713D1 (de) 2002-01-10
HK1030633A1 (en) 2001-05-11
DE69802713T2 (de) 2002-09-05
LU90179B1 (fr) 1999-05-27
ES2166191T3 (es) 2002-04-01
PL340633A1 (en) 2001-02-12
BR9814222A (pt) 2000-10-03
RU2194766C2 (ru) 2002-12-20
CN1083888C (zh) 2002-05-01
ATE209693T1 (de) 2001-12-15
US6544468B1 (en) 2003-04-08
TW383338B (en) 2000-03-01
KR20010031887A (ko) 2001-04-16
WO1999028510A1 (fr) 1999-06-10
CZ298626B6 (cs) 2007-11-28
JP4199418B2 (ja) 2008-12-17
AU9747598A (en) 1999-06-16
CZ20001721A3 (cs) 2001-07-11
ZA9810691B (en) 1999-05-31

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