EP0012310A1 - Beschickungsvorrichtung für einen Schachtofen - Google Patents

Beschickungsvorrichtung für einen Schachtofen Download PDF

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Publication number
EP0012310A1
EP0012310A1 EP79104836A EP79104836A EP0012310A1 EP 0012310 A1 EP0012310 A1 EP 0012310A1 EP 79104836 A EP79104836 A EP 79104836A EP 79104836 A EP79104836 A EP 79104836A EP 0012310 A1 EP0012310 A1 EP 0012310A1
Authority
EP
European Patent Office
Prior art keywords
bell
segments
distributor
hopper
skirt
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
EP79104836A
Other languages
English (en)
French (fr)
Other versions
EP0012310B1 (de
Inventor
Edouard Legille
Pierre Mailliet
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
Priority to AT79104836T priority Critical patent/ATE4601T1/de
Publication of EP0012310A1 publication Critical patent/EP0012310A1/de
Application granted granted Critical
Publication of EP0012310B1 publication Critical patent/EP0012310B1/de
Expired 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 device for loading a shaft furnace, comprising a rotary loading hopper with movable bottom, a sealed envelope around this hopper, the upper part of this envelope being provided with at least one insertion orifice. of material and equipped with a sealing valve, while the bottom of the envelope cooperates with a bell which can slide along the vertical axis of the furnace and of the device.
  • This kind of loading device more commonly referred to as a "bell jar” fitted, a few years ago, almost all blast furnaces and is still currently the most common type of loading devices.
  • This kind of device which are distinguished, among others, by the number of bells.
  • the use of several superimposed bells is necessary to avoid putting the oven enclosure in direct contact with the atmosphere during the introduction of the material to be put into the oven. This obviously requires a very precise sequence of successive operations of moving the bells.
  • this type of loading device has several drawbacks which become all the more serious the larger their dimensions and the pressure of the furnace.
  • the lower bell which is the largest and which functions as a distributor and, generally a sealing member to delimit an upper airlock, presents, because of its size, serious manufacturing problems.
  • bells of this size pose problems for their operation and their replacement. This maneuver requires not only an important means for balancing the p re- sions but also control means powerful enough, which generally increases the height of the installation.
  • the object of the present invention is to provide a new calf loading device of the kind described in the preamble which makes it possible to significantly reduce the aforementioned drawbacks, in other words to provide a new loading device of the conventional type which allows variations in the mode of distribution of the material to be placed in the oven, in particular depending on the nature of this and operating conditions of the oven, while respecting other essential criteria such as, for example, low height, simple mechanism, ease of dismantling and maintenance, etc.
  • a device of the type described in the preamble is essentially characterized by a material distributor in the form of a frustoconical skirt with variable opening angle, arranged around the vertical axis of the device below the bell.
  • the skirt is composed of a number of overlapping segments, each having the shape of a sector of an annular surface, mounted by their narrow side on a ring of pivots and each connected to a rod arranged in the vertical axis and connected to a control unit arranged outside, to undergo a sliding movement and change the opening angle of the skirt.
  • connection between the different segments and the sliding rod is advantageously carried out by means of a star-shaped plate whose points are provided with a penetrating lug and sliding in an elongated opening of the associated segment.
  • a cylindrical deflector arranged between the distributor and the small bell deflects the current of the loading material flowing from the hopper onto the distributor which, in turn, deflects the current along a conical sheet on the loading surface.
  • Adjusting the opening angle of the skirt by sliding the rod makes it possible to change the angle of discharge of this sheet and, consequently, the radius of the annular surface of the material deposit. It is therefore possible to change after each loading cycle, corresponding to the flow of the contents of the rotary hopper, the dumping angle or else make corrections to the loading profile based on the information provided by a profile probing device. of the loading surface.
  • the dispenser according to the present invention a j in addition, the advantage of being cleared by the collar of the blast furnace through the joint associated with the small bell and after removal thereof.
  • a loading device designated, as a whole, by the reference 12, mounted on a blast furnace 10.
  • This loading device 12 is mounted on a flange 14 forming part of the neck 16 blast furnace 10.
  • a loading hopper 18 is mounted in a rotating cage 21 associated with a guide device 20, 22 allowing vertical movement of the hopper.
  • a drive motor 24 with peripheral drive and intended to communicate to the cage 21 and the hopper 18 a rotary movement by means of a drive pinion 26 and a bearing 28.
  • the guide system 20, 22 may consist of two pairs of rollers with concave rolling surface each cooperating with guides with convex surface fixed on the loading hopper 18.
  • the latter rests by its own weight on a conical bottom 30, with conicity turned upwards and serving as a protective and wear cone for a bell 32.
  • the conical bottom 30 is integral with an axial sheath 34 composed of anti-wear elements surrounding a hollow rod 38 for suspending the small bell 32. This sheath 34 is suspended from this hollow rod 38 by means of a bearing 36.
  • the action of the motor 24 communicates a gyratory movement to the assembly formed by the rotating cage 21, the guide system 20, 22, the hopper 18, the conical bottom 30 ; and the sheath 34, while a vertical sliding movement of the hollow rod 38 allows the hopper 18 to slide vertically relative to its guide system 20,22.
  • a sealed envelope 40 surrounds the rotary hopper 18. This envelope is tightly fixed on the flange 14 and can be closed, on the blast furnace side 10, by the bell 32 when the latter is in the raised position applied to a seat 42 fixed to the base of the casing 40.
  • the watertight casing 40 communicates at the upper part with a recipe chute 44 from which it can be isolated in a leaktight manner by a sealing valve 46. Above this recipe chute 44 terminates means of transport known per se and not shown, such as for example skips or a conveyor belt, for bringing the loading material.
  • a conical distributor 48 suspended from the bell 32 by means of an intermediate circular piece 50 integral with the bell 32.
  • the distributor 48 therefore follows the upward and downward movement of the bell 32 and when the latter is lowered, the distributor 48 is moved to the position in phantom.
  • the distributor 48 has a frustoconical surface or skirt 52 formed by a number of overlapping segments 54. These segments 54 each have the shape of a sector of an annular surface, slightly curved, so as to generate this conical surface when they are mounted, one after the other, in partial overlap, around the axis O of the furnace.
  • the part 50 has on its inner face a ring of ribs 56, the number of which corresponds to that of the segments 54. However, it is not necessary for all these ribs to extend to the bell 32.
  • Each of the segments 54 is articulated on the corresponding rib 56 by means of pivots 58.
  • Each of the segments 54 has on its inner concave face a flank 60, constituted by a plate welded or poured perpendicularly on the segments 54. These flanks 60 each have a slot 62 into which penetrates a lug 64 provided on a corresponding point 68 of a star plate 66 whose number of points 68 corresponds to the number of segments 54.
  • the plate 66 is fixed to the lower end of a control rod 70 coaxial with the hollow rod 38 and connected outside the sealed envelope 40 to a drive mechanism for raising or lowering the plate 66.
  • each of the segments 54 is determined by the position of the plate 66.
  • this plate 66 is in the lowered position relative to with the small bell 32, the segments 54 are separated and the opening angle of the skirt 52 is maximum.
  • the control rod 70 is raised relative to the small bell 32, the segments 54 are folded, in a group, in the direction of the axis O and the opening angle of the skirt 52 gradually decreases until in the position according to Figure 4.
  • the skirt 52 passes through a cylindrical position, that is to say that in the extreme position according to Figure 4, the taper of the skirt is opposite to that of figure 1.
  • the pivot angle of each of the segments 54 between the two extreme positions is 60 °.
  • This angle is represented by ⁇ in FIG. 1.
  • each of the lugs 64 slides in the slot 62 of the corresponding flank 60 in order to ensure the transition between the vertical movement of the lugs 64 and the pivoting movement of the slots 62 around the pivots 58.
  • the angle ⁇ is equal to 60 °, it is preferable that the axis of the slots 62 occupies in the two extreme positions an angle of 30 ° relative to the horizontal passing through the pivots 58.
  • the number of segments must, of course, be a divisor of 360. This number must, moreover, be fairly high, that is to say at least equal to 16 and, preferably, equal to 24, this for thermal and geometric reasons. In fact, the segments must not be too large to keep the thermal expansion within acceptable limits. The geometric reason is that the width of the segments on the outer side opposite the pivots 58 cannot be too high to allow sufficient closing of the skirt 52.
  • the segments 54 will be made of special refractory steel having good wear resistance properties. These steels are well known in the field concerned.
  • a circular deflector 72 is provided around the distributor 58. The lower edge of this deflector 72 converges in the direction of the axis O so as to deflect the material flowing from the hopper 18 onto the skirt 52 of the distributor 48.
  • a control unit 74 for actuating the bell 32 and controlling the opening angle of the skirt 52 is mounted immediately above the envelope 40.
  • the hollow rod 38 of the bell 32 passes through the envelope 40 by a press -throat and is connected by means of a removable collar 82 to the rod 80 of a hydraulic cylinder 78.
  • the control rod 70 of the distributor 48 passes through the entire hollow rod 38 as well as the cylinder 78 and is actuated by a second cylinder 84 mounted above the jack 78.
  • This second jack 84 is integral with the piston of the jack 78, so that the jack 84 follows the vertical sliding movement of the hollow rod 38.
  • References 86 and 88 designate supply lines for a cooling fluid for cooling certain parts of the distributor 48.
  • Line 86 is intended to supply a certain number of tubes, not shown, arranged in a ring between the hollow rod. 38 and the control rod 70. These tubes are intended to bring a cooling fluid into conduits circulating through the ribs 56, the pivots 58, the segments 54 and possibly the sides 60.
  • a second circulation of a cooling fluid can be provided through the interior of the control rod 70 from the pipe 88 as far as the points 68 of the star plate 66.
  • the cooling of the plate 66 and of the different segments 54 increases their mechanical resistance and therefore reduces the risk of deformation.
  • the lower bell For filling the loading hopper 18, the lower bell must be applied in a manner waterproof against its seat 42 so that the oven 10 is sealed in relation to the outside. After opening the valve 46, the loading material can be introduced through the acceptance chute 44.
  • the motor 24 communicates thereto a continuous or intermittent rotary movement according to that the material is brought into the chute 44 by a conveyor belt or by a skip installation.
  • the valve 46 is closed and a pressure equalization is carried out by bringing the pressure inside the envelope, by means known per se, to a pressure corresponding approximately to that prevailing at inside the oven.
  • the next phase consists in actuating the jack 78 to lower the hollow rod 38 supporting the bell 32.
  • This descent of the bell 32 drives, by gravity, the sheath 34, that is to say the entire hopper of loading 18, by sliding in the guide system 20,22. From a certain moment (see FIG. 2), the descent of the hopper 18 is stopped by a ring of shock absorbers incorporated in the lower part of the casing 40. In the figures, we see two of these shock absorbers 90, 91. It should be noted that during the downward movement of the hopper 18, the motor 24 is stopped.
  • the seat 42 is bolted to the upper face of a lower flange 94 of the casing 40 whose internal diameter is greater than the maximum external diameter of the bell 32 and of the distributor 48. This makes it possible to dismantle the assembly comprising the bell 32 and the distributor 48 by release through the flange 94 after having dismantled the seat 42 and the bottom 92 of the hopper 18 and brought the distributor 48 to the position illustrated in FIG. 4.
  • control unit 74 is mounted directly on the casing 40 allows an extremely low construction and makes the usual bell tower superfluous.
  • a second factor which comes into play favorably for a low construction is the fact that in the proposed loading device, there is only one bell left and that the distributor 48 can be brought closer to this bell 32, since it does not there is more storage between this bell 32 and the distributor 48.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Heat Treatment Of Articles (AREA)
  • Jib Cranes (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Drying Of Solid Materials (AREA)
  • Frying-Pans Or Fryers (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Vending Machines For Individual Products (AREA)
EP79104836A 1978-12-12 1979-12-03 Beschickungsvorrichtung für einen Schachtofen Expired EP0012310B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104836T ATE4601T1 (de) 1978-12-12 1979-12-03 Beschickungsvorrichtung fuer einen schachtofen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU80646 1978-12-12
LU80646A LU80646A1 (fr) 1978-12-12 1978-12-12 Dispositif de chargement d'un four a cuve

Publications (2)

Publication Number Publication Date
EP0012310A1 true EP0012310A1 (de) 1980-06-25
EP0012310B1 EP0012310B1 (de) 1983-09-07

Family

ID=19729070

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104836A Expired EP0012310B1 (de) 1978-12-12 1979-12-03 Beschickungsvorrichtung für einen Schachtofen

Country Status (10)

Country Link
US (1) US4307987A (de)
EP (1) EP0012310B1 (de)
JP (1) JPS5582706A (de)
AT (1) ATE4601T1 (de)
CA (1) CA1146750A (de)
DE (1) DE2966145D1 (de)
ES (1) ES486746A1 (de)
LU (1) LU80646A1 (de)
MX (1) MX150657A (de)
SU (1) SU963474A3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088253A1 (de) * 1982-03-10 1983-09-14 Paul Wurth S.A. Vorrichtung zur Beschickung eines Schachtofens
RU2618304C1 (ru) * 2015-11-27 2017-05-03 Петр Иванович Щербаков Устройство для маневрирования конусом доменной печи

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125410C2 (de) * 1981-06-27 1983-04-28 Beckenbach, Ulrich, Dipl.-Ing., 4005 Meerbusch Vorrichtung zur Beschickung eines Schachtofens
LU85811A1 (fr) * 1985-03-15 1986-10-06 Wurth Paul Sa Installation de chargement d'un four a cuve
DE3632724A1 (de) * 1986-09-26 1988-04-07 Gutehoffnungshuette Man Doppelschleusen-gichtverschluss fuer schachtoefen, insbesondere hochoefen
DE4445845C2 (de) * 1994-12-22 1996-10-31 Gutehoffnungshuette Man Begichtungsanlage für Schachtöfen, insbesondere Hochöfen
US6991415B1 (en) * 2001-09-07 2006-01-31 Anschultz Jackie R Gravity grain diverter
RU2279484C1 (ru) * 2005-02-07 2006-07-10 Общество С Ограниченной Ответственностью "Исследовательско-Технологический Центр "Аусферр" Устройство для подачи компонентов при прямом легировании стали
US8776844B1 (en) * 2011-02-03 2014-07-15 Carl F. Yaegel Flow diverter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE611801C (de) * 1935-04-06 E H Julius Stoecker Dr Ing Gichtverschluss fuer Schachtoefen, insbesondere Hochoefen
US2560844A (en) * 1948-07-16 1951-07-17 Cie Forges Et Acieries Marine Distributing device for the charge of shaft furnaces
US2586298A (en) * 1947-07-25 1952-02-19 Cie Forges Et Acieries Marine Distributing device for the charge of shaft furnaces
FR1266894A (fr) * 1960-09-06 1961-07-17 Installation de chargement pour haut fourneau ou analogue
BE721977A (de) * 1968-10-07 1969-03-14
DE1956261A1 (de) * 1969-11-08 1971-05-19 Demag Ag Verteilvorrichtung fuer das Beschickungsgut in Schachtoefen,insbesondere in Druckhochoefen
DE2029089B2 (de) * 1969-08-22 1971-10-14 Ste Industrielle Delattre-Levivier, S.I.D.L., Paris Vorrichtung zum einfuellen und verteilen der chargen fuer einen schachtofen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US796784A (en) * 1904-08-15 1905-08-08 John Gilman Witherbee Charging apparatus.
JPS5825724B2 (ja) * 1973-11-01 1983-05-30 ア−サ− ジ− マツキ− アンド カンパニ− チヨクリツロヘノゲンザイリヨウソウニユウホウウ オヨビ ソノソウニユウソウチ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE611801C (de) * 1935-04-06 E H Julius Stoecker Dr Ing Gichtverschluss fuer Schachtoefen, insbesondere Hochoefen
US2586298A (en) * 1947-07-25 1952-02-19 Cie Forges Et Acieries Marine Distributing device for the charge of shaft furnaces
US2560844A (en) * 1948-07-16 1951-07-17 Cie Forges Et Acieries Marine Distributing device for the charge of shaft furnaces
FR1266894A (fr) * 1960-09-06 1961-07-17 Installation de chargement pour haut fourneau ou analogue
BE721977A (de) * 1968-10-07 1969-03-14
DE2029089B2 (de) * 1969-08-22 1971-10-14 Ste Industrielle Delattre-Levivier, S.I.D.L., Paris Vorrichtung zum einfuellen und verteilen der chargen fuer einen schachtofen
DE1956261A1 (de) * 1969-11-08 1971-05-19 Demag Ag Verteilvorrichtung fuer das Beschickungsgut in Schachtoefen,insbesondere in Druckhochoefen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088253A1 (de) * 1982-03-10 1983-09-14 Paul Wurth S.A. Vorrichtung zur Beschickung eines Schachtofens
US4512702A (en) * 1982-03-10 1985-04-23 Paul Wurth S.A. Installation for feeding a shaft furnace
RU2618304C1 (ru) * 2015-11-27 2017-05-03 Петр Иванович Щербаков Устройство для маневрирования конусом доменной печи

Also Published As

Publication number Publication date
JPS6328961B2 (de) 1988-06-10
MX150657A (es) 1984-06-15
LU80646A1 (fr) 1979-04-13
US4307987A (en) 1981-12-29
ATE4601T1 (de) 1983-09-15
ES486746A1 (es) 1980-06-16
EP0012310B1 (de) 1983-09-07
JPS5582706A (en) 1980-06-21
SU963474A3 (ru) 1982-09-30
DE2966145D1 (en) 1983-10-13
CA1146750A (fr) 1983-05-24

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