EP2529037B1 - Ladevorrichtung für einen metallurgischen reaktor - Google Patents

Ladevorrichtung für einen metallurgischen reaktor Download PDF

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Publication number
EP2529037B1
EP2529037B1 EP11701398.7A EP11701398A EP2529037B1 EP 2529037 B1 EP2529037 B1 EP 2529037B1 EP 11701398 A EP11701398 A EP 11701398A EP 2529037 B1 EP2529037 B1 EP 2529037B1
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EP
European Patent Office
Prior art keywords
rotor
rotary
charging device
feeder spout
stationary
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.)
Active
Application number
EP11701398.7A
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English (en)
French (fr)
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EP2529037A1 (de
Inventor
Emile Lonardi
Guy Thillen
Jeannot Loutsch
Lutwin Franziskus
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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Publication date
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Publication of EP2529037A1 publication Critical patent/EP2529037A1/de
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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
    • 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 peculiar to furnaces of these types
    • F27B1/20—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2300/00—Process aspects

Definitions

  • the present invention generally relates to a rotary charging device for charging and distributing charge material (burden) in a metallurgical reactor e.g. a blast furnace or a melter-gasifier used in pig iron production.
  • a metallurgical reactor e.g. a blast furnace or a melter-gasifier used in pig iron production.
  • Such charging devices typically have the following construction. They comprise a stationary housing forming a closure on the top opening (throat) of the reactor.
  • the housing has an upper housing part, usually in the form of a connecting hopper or valve casing, which has one or more burden inlets and is mounted on top of a lower housing part, usually configured as a gear casing.
  • An annular rotor is rotatably arranged inside this lower housing part (gear casing) and supports a distribution member, mostly a pivotable distribution chute, for distributing charge material circumferentially inside the reactor.
  • a feeder spout is arranged centrally in the lower housing part and forms an open channel that channels charge material through a central passage in the rotor and onto the distribution member.
  • the present invention relates more particularly to an improved charging device, which is equipped with a conduit-connecting rotary joint for fluid supply to rotating components of the charging device, e.g. to the rotor and/or the distribution member. Accordingly, the rotary joint connects at least one stationary conduit to at least one rotary conduit that rotates with the rotor. Examples of such charging devices are discussed below.
  • PAUL WURTH proposed a cooling system with a kind of "open rotary joint" that works without watertight seals.
  • This kind of system now equips numerous blast furnace charging devices throughout the world. It includes an upper annular trough mounted coaxially on the upper circumference of the rotor to rotate therewith. Stationary ports supply cooling water into the upper rotary trough that is connected to cooling coils on the rotor. The coils have outlet pipes discharging into a fixed annular trough mounted on the stationary housing around a lower portion of the rotor.
  • PAUL WURTH proposed a chute equipped with water or inert gas cooling channels in U.S. patent no. 5,252,063 .
  • This system also uses an "open rotary joint" similar to that of US 4,526,536 , which does not permit pressurizing.
  • WO 03/002770 by PAUL WURTH on the other presents a rotary joint designed for a pressurized cooling circuit on the rotating components of a charging device.
  • the design of WO 03/002770 is an improvement over the design of U.S. 4,273,492 , in that the rotary part of the joint is supported in floating manner by the stationary part and in that seals, which are less tight i.e. not entirely watertight, are used (i.e. a small amount of leakage is foreseen). Therefore, these seals are less subject to problems of excessive wear. Whilst allowing pressurized forced circulation and increasing the seal service-live, large-diameter watertight seals arranged between the stationary and rotary parts of the joint are still required. Even though less rapidly, these seals still wear off due to the large diameter of the joint.
  • WO 97/37047 requires cables for electric power supply and conduits for hydraulic power supply and for water-cooling to pass onto the rotary hopper, among others for actuating the lower material gate valve, the lower sealing valve and the chute. Accordingly, WO 97/37047 proposes to arrange those conduits through a central pipe-shaped member, which passes through a bell, and via spokes connecting the pipe-shaped member to a feed hopper in the upper portion of the rotary hopper. By virtue of its unusual configuration, the device of WO 97/37047 enables the use of a small diameter rotary joint arranged on top of the pipe-shaped member.
  • this device has among others the drawbacks of involving considerable rotating masses, including that of the intermediate hopper and its payload of charge material, and that of not being compatible with conventional designs of charging device components, especially of the gear casing comprising the drive mechanism for rotating the distribution chute.
  • an installation according to WO 97/37047 can only practically be used with low-pressure reactors that operate at no more than 0.1 - 0.2 bar overpressure.
  • the invention as presently claimed in independent claim 1, relates to a charging device for a metallurgical reactor that may employ a standard-type drive mechanism.
  • the proposed charging device thus comprises a stationary housing with a lower housing part having an annular rotor arranged therein.
  • the rotor is rotatable about an axis of rotation and has a central passage coaxial with the axis of rotation.
  • the housing has an upper housing part with at least one charge material inlet offset from the axis of rotation, through which the charging device can be connected to upstream devices of a complete charging installation, e.g. to a stationary intermediate storage hopper.
  • a distribution member e.g. a pivotally mounted distribution chute, is supported by the rotor to rotate together with the rotor, which can be driven by a typical drive mechanism.
  • the charging device also comprises a feeder spout arranged centrally in the stationary housing.
  • the feeder spout provides an open channel that channels charge material through the central passage onto the distribution member.
  • charging device has at least one stationary conduit, at least one rotary conduit that rotates together with the rotor, and a conduit-connecting rotary joint that has a stationary part and a rotary part and connects the stationary conduit to the rotary conduit for fluid supply to the rotor and/or to the distribution member.
  • the charging device has a feeder spout:
  • the rotary conduit can thus conveniently pass from the rotary part of the rotary joint via the support and via the outside of the feeder spout to any rotary component of the charging device that requires fluid supply.
  • joint diameter refers to the decisive diameter of (a virtual cylinder through) the interface between the stationary part and the rotary part of the joint.
  • the width of the passage as measure of comparison refers to the smallest diameter of free passage within the rotor, i.e. the width required for receiving the feeder spout and/or permitting a nominal charge material flow.
  • the invention thus enables use of a rotary joint with substantially smaller diameter.
  • the joint diameter may even be smaller than the internal diameter of the outlet of the feeder spout, i.e. smaller in diameter than the minimum required flow cross-section.
  • the proposed configuration solution requires modifications merely at the level of the feeder spout. No other substantial modifications in the charging device components, in particular at the level of the drive mechanism for driving the distribution member, are necessary for putting into practice the proposed solution.
  • the support comprises an axle fixed to the one or more spoke members and a dedicated auxiliary roller bearing supporting both the axle and the feeder spout in rotation.
  • the feeder spout preferably has an associated mechanical coupling, e.g. an axially slideable coupling, connecting the feeder spout in rotation to the rotor so that they rotate synchronously despite the independent bearing of the feeder spout.
  • the feeder spout is fixedly attached to the rotor i.e. the former is supported in unison with the latter. Since the rotor is rotatably supported on a main roller bearing, the main roller bearing thus also supports the feeder spout in this embodiment.
  • the spout can be fixedly attached to the rotor by one or more transverse beams extending radially in the central passage so as to allow any charge material falling incidentally outside the spout to pass through the central passage.
  • the stationary part of the joint is preferably flexibly attached to the upper housing part so as to allow radial movement of the rotary joint relative to the housing, e.g. by means of a flexible member and at least two articulated tie rods.
  • the rotary joint may be mounted directly onto the spoke member(s).
  • an axle is provided it is preferably hollow and coaxial with the longitudinal spout axis. Most preferably, it has a lower axle portion that is fixed to the spoke member(s) at a level above the spout outlet section and an upper axle portion arranged at a level above the spout inlet section. Accordingly, neither the axle nor the rotary joint suffer from impacts if the joint is sheltered at a distal and safe position on the upper portion of the axle.
  • the feeder spout preferably comprises at least two spoke members fixed to the inlet section and an annular flow-shaping ring fixed coaxially with the longitudinal axis to the spoke members.
  • the flow-shaping ring allows retaining and circumferentially distributing charge material inside the feeder spout to reduce adverse reduction of flow rate when the spoke members cross the incoming flow during rotation of the spout.
  • the conduits are connected by means of the rotary joint.
  • the conduits On their section starting from the rotary joint and ending at the rotor or at the distribution member (and vice versa), they preferably pass via the spout support, ideally inside thereof, and via the outside of the feeder spout so as to be sheltered from any material impact.
  • the housing may comprise a circumferential dust protection skirt surrounding the feeder spout and protruding into the rotor passage with sufficient interspace to permit charge material that drops besides the spout to descend nevertheless into the passage of the rotor.
  • the spout protrudes into the rotor passage with annular clearance and so as to shield the rotor from charge material, ideally over an axial distance of at least 50% of the passage height.
  • the feeder spout is funnel-shaped, preferably with an outlet section of cylindrical or downwardly tapering shape, and with a frusto-conical inlet section.
  • the proposed configurations are particularly suited for a charging device with rotating and pivoting distribution chute and also permit coolant supply of a distribution chute equipped with a water-cooled jacket.
  • the charging device more specifically its stationary upper housing part, has at least two charge material inlets offset from the rotation axis.
  • the proposed design minimizes undesirable interruptions while avoiding non-simultaneous interruptions of both incoming flows when feeding through both inlets at the same time.
  • the number of spokes and their geometrical arrangement preferably corresponds to the number and geometric arrangement of material inlets.
  • FIG.1 partially illustrates a charging installation for a metallurgical reactor, e.g. a blast furnace or a melter gasifier.
  • the installation comprises a charging device, generally identified by reference numeral 100.
  • the rotary charging device 100 comprises a stationary housing 102 that has a lower housing part 104 and an upper housing part 106.
  • the upper and lower housing parts 104, 106 are adjacent separate casings connected in gas-tight manner at flange 107.
  • the lower housing part 104 is attached to a flange at the top opening (throat) of the reactor. Since the reactor typically operates at overpressure, e.g. at 2 to 5 bar, the housing 102 is configured as a gas-tight enclosure, through which furnace gas cannot leak and which connects the top opening to material feeding devices (not shown) of the charging installation.
  • the charging device 100 is of the rotary type to enable distribution of bulk charge material, e.g. lump ore, sinter, pellets, direct reduced iron (DRI), compacted DRI or coke, inside the reactor.
  • bulk charge material e.g. lump ore, sinter, pellets, direct reduced iron (DRI), compacted DRI or coke
  • rotor 108 an annular supporting structure, hereinafter called rotor 108, is rotatably arranged inside the lower housing part 104.
  • the rotor 108 is supported on a main roller bearing 109 that is fixed to the structure of the lower housing part 104. Accordingly, the rotor 108 is rotatable about a rotation axis A, which is normally vertical and typically coincides with the central axis of the reactor.
  • the rotor 108 supports a distribution member 116, typically a trough-shaped or conically tubular elongated distribution chute, so that the distribution member 116 rotates in unison with the rotor 108 about axis A.
  • the annular rotor 108 has an internal substantially cylindrical wall 111 that delimits a central passage 110, through which charge material drops onto the distribution chute 116.
  • the distribution chute 116 is attached to the rotor 108 by means of a mechanism configured for pivoting, i.e. varying the tilt angle of the distribution chute 116, about a pivoting axis C (see FIG.4 ) perpendicular to axis A.
  • a mechanism configured for pivoting, i.e. varying the tilt angle of the distribution chute 116, about a pivoting axis C (see FIG.4 ) perpendicular to axis A.
  • Various well-known components of the charging device 100 such as drive and gear components for rotating and pivoting the distribution chute 116, which are not essential to the present invention, are not shown. Suitable configurations are known, e.g. from U.S. patent 3'880'302 .
  • the distribution chute 116 distributes charge material in targeted manner radially and circumferentially inside the reactor in accordance with its tilting and rotational motion.
  • other types of rotary distribution members e.g. a non-pivoting chute according to
  • the upper housing part 106 has two radially opposite charge material inlets 112, 114 that are offset from the axis of rotation A and connected in sealed manner to a respective feed pipe.
  • charge material is supplied through the inlets 112, 114 from any suitable source such as, for instance upstream intermediate storage hoppers or directly from conveyor belts.
  • the charging device 100 is configured to direct and center a flow of charge material 115 centrally along axis A onto the distribution chute 116.
  • a feeder spout 120 is arranged with its longitudinal axis B centrally inside the stationary housing 102.
  • the feeder spout 120 is configured as an upwardly and downwardly unrestricted open channel for channeling a free falling flow of charge material received from the inlets 112, 114 through the central passage 110 onto the distribution member 116.
  • the feeder spout 120 has an upper inlet section 122 formed of a hollow frusto-conical mantle that is attached in smooth transition to a lower outlet section 124 made of a shell or tube of cylindrical or downwardly tapering tubular shape.
  • the inlet section 122 has an inlet of large cross-section adapted for receiving bulk material from both inlets 112, 114, whereas the outlet section 124 has an outlet of small cross-section for centering the flow 115.
  • the upwardly widening inlet section 122 is arranged inside the upper housing part 106.
  • the outlet section 124 is arranged at least partially in the lower housing part 104. While shorter forms of outlet sections are possible, the outlet section 124 of the feeder spout 120 preferably protrudes into the central passage 110 with an annular clearance toward the cylindrical wall 111 so as to shield the rotor 108 from charge material. As seen in FIG.1 , the outlet section 124 protrudes into the central passage 110, preferably on an axial distance of at least 50% of the height of the central passage 110 for reliable shielding and improved centering of the flow 115 onto the distribution chute 116.
  • the upper housing part 106 has a lower portion conjugated in shape to the frusto-conical inlet section 122 of the feeder spout 120.
  • a cylindrical sleeve 125 and the lower portion of the upper housing part 106 form a circumferential dust protection skirt surrounding the feeder spout 120.
  • the cylindrical sleeve 125 also protrudes into the passage 110 and may be water-cooled.
  • the upper housing part 106 and the sleeve 125 are configured to leave a circumferential interspace toward the feeder spout that permits charge material accidentally dropping past the inlet section 122 to descend through the passage 110 into the reactor.
  • the feeder spout 120 is rotatably supported relative the stationary housing 102 and coupled in rotation to the rotor 108.
  • Rotatably supporting the feeder spout 120 enables it to support a conduit-connecting rotary joint 130 (also called swivel joint or revolving joint), and more specifically its rotary part 132 that is connected in fluid tight manner to a stationary part 134 of the rotary joint 130.
  • the feeder spout 120 is supported by means of an auxiliary roller bearing 129 that is arranged on the top cover of the upper housing part 106.
  • FIG.1 merely exemplarily illustrates a two-path radial type rotary joint 130 for forward and return connection.
  • the rotary joint 130 may be of the axial or radial type and of a single-path or multi-path configuration.
  • the feeder spout 120 comprises a support 140 that has two radially opposite spoke members 142, 144, which extend generally radially, e.g. transversely upward at an angle to axis B, from the upper inlet section 122 toward the axis B.
  • Suitable spoke members 142, 144 are e.g. hollow profiles of rectangular or inverted U-shape.
  • the spoke members 142, 144 are fixed to the feeder spout 120.
  • the spoke members 142, 144 are fixed to a central axle 146, more specifically, to a lower portion of the axle 146.
  • the axle 146 is hollow and extends coaxially with axis B.
  • the axle 146 extends through a seal at the top cover of the upper housing part 106 and has an upper portion outside the housing 102, to which the rotary part 132 of the rotary joint 130 is fixedly mounted in order to rotate with the feeder spout 120.
  • the support 140 supports the rotary joint 130 above the outlet section 124, and preferably above the inlet section 122, to avoid impact of material. Arranging the rotary joint 130 centrally on or approximately on the axis A and above the region through which the flow 115 passes, has the major benefit of enabling the use of a small-diameter standard type rotary joint 130.
  • a considerable increase in joint life-time and at the same time reduced cost of the rotary joint 130 is achieved. Furthermore, even though the rotary joint 130 could be mounted immediately above the feeder spout 120, mounting the rotary joint 130 outside and above the housing 102 facilitates maintenance. Furthermore, the auxiliary roller bearing 129 on the upper portion of the axle 146 is also arranged outside the housing 102, thus avoiding exposure to the reactor atmosphere.
  • the axle 146 has its lower end arranged significantly above the outlet section 124 of the rotatable feeder spout 120 in order to further minimize the risk of material impact.
  • Other configurations for supporting the rotary part 132 of the rotary joint 130 coaxially with the longitudinal axis B of the feeder spout 120 are not excluded however.
  • the hollow axle 146 is water-cooled, e.g. by means of a cooling serpentine (not shown) connected to the rotary part 132 of the rotary joint 130 and arranged inwardly on the cylindrical wall of the axle 146.
  • conduits connected to the rotary part 132 are arranged to pass from the rotary part 132 via the support 140 and via the outside surface of the feeder spout 120 toward the rotating components that require fluid supply, e.g. the rotor 108 and/or the distribution member 116.
  • respective water-cooling circuits e.g. cooling serpentines, are provided on both the rotor 108, for cooling the heat-exposed cylindrical wall 111, and on the distribution chute 116, which is also directly exposed to the heat inside the reactor.
  • a rotary forward conduit 152 and a rotary return conduit 153 pass inside the hollow axle 146, inside the spoke members 142, 144 and downwardly along the outside of inlet and outlet sections 122, 124 into the central passage 110.
  • the rotary forward and return conduits 152, 153 are respectively connected to an inlet and an outlet of a cooling circuit arranged on the rotor 108, e.g. to cool the cylindrical wall 111.
  • the rotary forward and return conduits 152, 153 are respectively connected to a coolant inlet and outlet of the distribution chute 116, which has a water-cooled jacket.
  • the return conduits 152, 153 are also connected to two cooling arrangements for cooling two pivotally actuated chute suspension shafts 156, 158.
  • the suspension shafts 156, 158 support and pivot the chute 116 about axis C and are thus also exposed to heat from inside the reactor.
  • the mentioned connections are made e.g. using heat and wear resistant flexible hoses, whereas the rotary forward and return conduits 152, 153 themselves are preferably made of standard tubes that are mounted in floating manner to allow axial dilatation, e.g. with suitable pipe clips.
  • the outlet section 124 is arranged at least partially in the lower housing part 104, the outlet section 124 shields the rotary conduits 152, 153 from bulk material flowing inside the feeder spout 120. To enhance this effect, a significant extent of vertical protrusion of the outlet section 124 inside the central passage 111 is preferred, as shown in FIG.1 .
  • the feeder spout 120 is coupled in rotation to the rotor 108 to rotate synchronously therewith.
  • a mechanical coupling 160 preferably an axially slideable coupling.
  • the mechanical coupling 160 may be a suitable articulated rod linkage or any other drive type fastening, e.g. an inverted U-shaped tappet engaging respective axially oriented tappet holes on the rotor 108 and the outlet section 124.
  • the coupling 160 fixes the feeder spout 120 in rotation to the rotor 108 so that both rotate in unison despite being independently supported by respective roller bearings 109, 129.
  • an independent rotational support avoids the risk of radial motion of the rotary joint 130 off the axis.
  • the auxiliary roller bearing 129 is mounted close to or preferably adjacent the rotary joint 130 as best seen in FIG.1 . While mechanical coupling is preferred, other means of coupling the rotor 108 and the feeder spout 120 in rotation, such as a synchronized auxiliary drive driving the feeder spout 120 are not excluded.
  • a rotary electric connector e.g. of the slip ring type, can be integrated in or provided adjacent to the rotary joint 130 for powering electric components on the rotating parts of the charging device 100, e.g. on the rotor 108.
  • the rotary joint 130 connects the rotary conduits 152, 153 respectively to a stationary forward conduit 154 and a stationary return conduit 155 of any suitable stationary cooling circuit (not shown).
  • FIGS.1-4 illustrate a preferred embodiment for connecting cooling circuits on rotating parts of the charging device 100
  • the rotary joint 130 may alternatively or in addition be used for connecting other types of circuits, e.g. a hydraulic power circuit for actuating a hydraulic actuator for pivoting the chute according to US 6,481,946 , and/or a lubrication circuit.
  • the feeder spout 120 is equipped with an annular flow-shaping ring 170 that is fixed coaxially with axis B to the spoke members 142, 144, e.g. downstream, upstream or at the level of the spoke member 142, 144 (when seen relative to the flow 115).
  • the flow-shaping ring 170 is configured as a so-called "stone box", i.e. as a material retaining ring, in which a layer of charge material is retained in order to avoid wear-off.
  • the flow-shaping ring 170 has any suitable cross-section that is concave in the flow direction of flow 115, e.g. a simple L-shaped cross-section as illustrated in FIG.1 .
  • the flow-shaping ring 170 is configured as a closed ring covering 360° in circumference so as to continuously obstruct inflow from the inlets 112, 114, irrespectively of the rotational position of the feeder spout 120.
  • a first function of the flow-shaping ring 170 is to reduce the extent of interruption of the flow 115 when the rotating spoke members 142, 144 cross the flow 115.
  • the annular flow-shaping ring 170 is positioned centrally within the flow path of material falling into the feeder spout 120.
  • the flow-shaping ring 170 acts as a "spreader" and causes circumferential distribution of material about axis B, i.e. broadening of the flow. Since the flow-shaping ring 170 broadens the flow, it reduces the flow interruption when the spoke members 142, 144 cross the flow 115.
  • the flow-shaping ring 170 reduces eccentric impact of the flow 115 on the distribution chute 116, especially in case of low flow-rates. As illustrated in FIG.1 , it radially divides the flow into an inward partial flow and an outward partial flow. At low flow rates, these partial flows collide above or within the outlet section 124 into a recombined flow having reduced horizontal velocity.
  • the annular flow-shaping ring 170 enhances mixing of materials, in case two different types of material are dropped simultaneously from each inlet 112, 114 respectively. Enhanced mixing downstream the flow-shaping ring 170 is another consequence of circumferentially spreading and radially dividing each of the inflows as described above.
  • FIGS.5-6 illustrate a second embodiment of a charging device 200.
  • reference signs with incremented hundreds digit refer to structurally and/or functionally identical parts with respect to FIGS.1-4 . Therefore, only the main differences and notable common features will be detailed below.
  • the charging device 200 has a stationary housing 202 with a lower housing part 204 fixed immediately on the top opening of the reactor.
  • the upper housing part 206 also forms a gas gas-tight connection to upstream installation devices via inlets 212, 214.
  • the housing 202 is of unitary construction with the upper and lower housing parts 204, 206 forming a single enclosure.
  • the charging device 200 also has a feeder spout 220 of particular design arranged inside the housing 202. That is to say the feeder spout 220 is also rotatable about its longitudinal axis B and comprises a support 240 configured for supporting the rotary part 234 of a conduit connecting rotary joint 230 coaxially with axis B and above the lower housing part 202.
  • the support 240 also has an axle 246 with an upper portion carrying the rotary joint 230 above the housing 202.
  • a flow-shaping ring 270 is also fixed to the spoke members 242, 244 of the support 240.
  • the feeder spout 220 is fixedly attached to the rotor 208 by means of one or more transverse beams, e.g. two radially opposite transverse beams 262, 264, as best seen in FIG.6 .
  • the transverse beams 262, 264 extend radially through the passage 210 and are circumferentially spaced in order to allow charge material, which accidentally passes outside of the feeder spout 220, to pass between them and drop into the reactor.
  • the transverse beams 262, 264 have their respective ends rigidly fixed to the outlet section 224 and to the rotor 208, e.g. to a lower region of the cylindrical wall 211.
  • the transverse beams 262, 264 are arranged in the lowermost region of the passage 210 in order to provide additional heat shielding. Being rigidly connected by the transverse beams 262, 264, the feeder spout 220 and the rotor 208 form a unitary structure that rotates in unison. Consequently, no separate roller bearing is required.
  • the main roller bearing 209 of the rotor 208 also supports the feeder spout 220 with its longitudinally axis B coinciding with rotation axis A.
  • the stationary part 234 of the rotary joint 230 is attached to the top cover of the upper housing part 206 by means of a flexible member 280.
  • the flexible member 280 is preferably a gas-tight bellows, i.e. a corrugated expansion joint (often called compensator), sealingly connecting the rotary joint 230 to the top opening in the upper housing part 206, in order to avoid gas leakage.
  • two or more articulated tie rods 282 fasten a mounting flange to the top cover of the upper housing part 206.
  • the stationary part 234 is fixed on this mounting flange, as illustrated in FIG.1 .
  • one or more tangential tie rods (not shown) are preferably provided for fixing the stationary part 234 in rotation to the upper housing part 206.
  • a gas-tight seal is preferably provided in between the stationary part 234 and the axle 246 of the support 240, e.g. at the mounting flange, in order to isolate the rotary joint 230 from the reactor atmosphere inside the housing 202.
  • FIG.7 illustrates a charging device 300 according to a third embodiment, which is a variant of FIGS.1-4 .
  • Its central feeder spout 320 is also supported rotatably about its longitudinal axis B by means of an independent auxiliary roller bearing 329.
  • the auxiliary roller bearing 329 is also mounted on top of the upper housing part 306 shortly below the conduit connecting rotary joint 330.
  • the roller bearing 329 and the rotary joint are easily accessible and protected from impact of material. They are further protected from furnace gases by means of a seal or gasket between the top cover of the upper housing part 306 and the axle 347 that supports the feeder spout 320.
  • the funnel-shaped feeder spout 320 is also coupled in rotation to the rotor in the lower housing part (not shown). Accordingly, the lower portion of the charging device 300, at the level of the lower housing part (not shown), has components and functions configured as described above by reference to FIGS.1-4 , in particular any kind of desired fluid-supplied circuit on the rotor and/or on the distribution member.
  • FIG.7 illustrates only modifications in the upper housing part 306.
  • the support 341 has a modified configuration. It has radially opposite spoke members 343, 345 that extend transversely upwards toward axis B to a higher level, i.e. over a longer extent and at steeper angle.
  • the flow-shaping ring 370 has identical configuration and function as in FIG.1-4 . Only its attachment to the steeper spoke members 343, 345 is adapted. Using longer spoke members 343, 345, the axle 347 that carries the feeder spout 320 and the rotary joint 330 can have considerably shorter length when compared to FIGS.1-4 . This configuration may be preferred, e.g. in case the diameter of the axle 347 and its roller bearing 329 has to be larger, e.g.
  • a small-diameter rotary joint 330 of suitable commercially available type can be used.
  • the rotary joint 330 that connects one or more required conduits to the rotor does not necessarily have the same larger diameter as the axle 347, as seen in FIGS.1 &7.
  • the rotary joint 330 may have a smaller rotary part 332 mounted centrally within the top front end of the axle 347.
  • Other parts, especially conduit connections, structurally and/or functionally identical to those of FIGS.1-4 are not repeatedly described and indicated by corresponding reference signs with incremented hundreds digit.
  • FIG.8 in turn illustrates another embodiment of charging device 400.
  • This charging device 400 is a variant of the device 200 of FIG.5 with modifications in the arrangement of the small-diameter rotary joint 430 for conduit connection. More specifically, FIG.8 shows another possible configuration for supporting the rotary part 432.
  • the rotary joint 430 is mounted inside the upper part 406 of the housing 402. This allows eliminating the axle and the seal used, mainly for gas-tightness, in preceding embodiments.
  • the rotary joint 430 is mounted immediately on top of steep spoke members 443, 445 configured identical to those of FIG.7 , at an angle of less than 45° with the vertical axis A or B.
  • the rotary joint 430 is still arranged in an uppermost position in the housing 402 where it is relatively sheltered.
  • the housing 402 can be of unitary or assembled construction, although an assembled construction is seen in FIG.8 .
  • the feeder spout 420 is fixedly attached to the rotor (not shown in FIG.8 ) to allow eliminating the auxiliary roller bearing. Consequently, whereas no separate roller bearing is required, minor radial movement of the rotary joint 430 with respect to the housing 402 should be allowed due to the axial distance towards and play in the main roller bearing of the rotor (see FIG.5 ).
  • a flexible member 480 connects the immobile upper housing part 406 to a separate mounting flange or mounting plate 481 that supports and fixes the stationary part 434 in rotation with respect to the housing 402.
  • the flexible member 480 may be a compensator.
  • Two or more articulated tie rods 482 fasten the mounting plate 481 and therewith the stationary part 434 of the rotary joint 430 axially to the housing 402.
  • One or more tangential tie rods can be provided for blocking any potential rotation of the stationary part 434.
  • the rotary part 432 however, is mounted directly onto the spoke members 452, 453 in order to rotate in unison with the feeder spout 420 and thus with the rotor that requires supply in fluid.
  • the stationary forward conduit 454 and the stationary return conduit 455 pass from the stationary part 434 through sealed openings in the mounting plates 481 outside the housing 402. Whereas exposing the rotary joint 430 to the less friendly atmosphere inside the housing 402, this embodiment may reduce investment cost by avoiding a wear-prone gas-tight seal, an additional axle and an additional auxiliary bearing.
  • Both embodiments discussed above enable the use of a small-diameter rotary joint for supplying fluid to the rotary parts of the charging in any desired kind of circuit, e.g. a water-cooling circuit, a hydraulic powering circuit, a lubrication circuit.
  • the proposed configuration enables high velocity / high-pressure force circuit water-cooling of heat exposed parts of the charging device by means of a standard type low-wear rotary joint.
  • the proposed configurations avoid exposing the rotary joint to the reactor atmosphere thus further increasing the joint life-time.
  • FIG.1-4 FIG.5-6 100 charging device 200 charging device 102 stationary housing 202 stationary housing 104 lower housing part 204 lower housing part 106 upper housing part 206 upper housing part 107 connection flange 208 annular rotor 108 annular rotor 209 main roller bearing 109 main roller bearing 210 central passage 110 central passage 211 cylindrical wall 111 cylindrical wall 212, 214 charge material inlets 112, 114 charge material inlets 215 flow of charge material 115 flow of charge material 216 distribution member 116 distribution member 220 feeder spout 120 feeder spout 222 inlet section 122 inlet section 224 outlet section 124 outlet section 227 protection skirt 125 cylindrical sleeve 230 rotary joint 129 auxiliary roller bearing 232 rotary part 130 rotary joint 234 stationary part 132 rotary part 240 support 134 stationary part 242, 244 spoke members 140 support 142, 144 spoke members 246 axle 252 rotary forward conduit 146 axle 253 rotary return conduit 152 rotary forward conduit 254 stationary forward conduit 153 rotary return conduit 255

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Claims (15)

  1. Beschickungsvorrichtung (100) für einen Hüttenreaktor, wobei die Beschickungsvorrichtung (100) aufweist:
    ein feststehendes Gehäuse (102) mit
    einem unteren Gehäuseteil (104) mit einem darin angeordneten ringförmigen Rotor (108), wobei der Rotor um eine Drehachse (A) drehbar ist und einen mittleren Durchgang (110) aufweist, der mit der Drehachse (A) koaxial ist; und
    einem oberen Gehäuseteil (106) mit mindestens einem Beschickungsmaterialeinlass (112, 114), der in Bezug auf die Drehachse (A) versetzt ist;
    ein Verteilungselement (116), das von dem Rotor (108) getragen wird, um sich zusammen mit dem Rotor zu drehen, um Beschickungsmaterial umfänglich um die Drehachse (108) zu verteilen;
    eine Zuführschnauze (120), die in dem feststehenden Gehäuse (102) mittig angeordnet ist, wobei die Zuführschnauze (120) eine Längsachse (B) aufweist und einen offenen Kanal zum Kanalisieren von Beschickungsmaterial durch den mittleren Durchgang (110) auf das Verteilungselement (116) bildet;
    mindestens eine feststehende Leitung (154, 155), die mit dem feststehenden Gehäuse (102) ortsfest bleibt, mindestens eine drehbare Leitung (152, 153), die sich zusammen mit dem Rotor (108) dreht, und eine leitungsverbindende drehbare Verbindungsstelle (130), die einen feststehenden Teil (134) und einen drehbaren Teil (132) aufweist und die feststehende Leitung (154, 155) mit der drehbaren Leitung (152, 153) zur Fluidzufuhr zu dem Rotor (108) und/oder zu dem Verteilungselement (116) verbindet;
    dadurch gekennzeichnet, dass
    die drehbare Verbindungsstelle (130) einen Verbindungsstellendurchmesser aufweist, der kleiner als die Breite des mittleren Durchgangs (110) ist;
    die Zuführschnauze (120) einen Einlassabschnitt (122) aufweist, der in dem oberen Gehäuseteil (106) angeordnet ist, und einen Auslassabschnitt (124) aufweist, der zumindest teilweise in dem unteren Gehäuseteil (104) angeordnet ist;
    die Zuführschnauze (120) drehbar gehalten und drehtechnisch an den Rotor gekoppelt ist, um sich zusammen mit dem Rotor (108) zu drehen;
    die Zuführschnauze (120) einen Träger (140) mit mindestens einem Speichenelement (142, 144) aufweist, das an der Zuführschnauze (120) befestigt ist und den drehbaren Teil (132) der drehbaren Verbindungsstelle (130) koaxial mit der Längsachse (B) über dem Auslassabschnitt (124) hält; und
    sich die drehbare Leitung (152, 153) von dem drehbaren Teil (132) der drehbaren Verbindungsstelle (130) über den Träger (140) und über die Außenseite der Zuführschnauze (120) zu dem Rotor (108) und/oder zu dem Verteilungselement (116) erstreckt.
  2. Beschickungsvorrichtung (100) nach Anspruch 1, dadurch gekennzeichnet, dass der Träger (140) eine Achse (146) aufweist, die an dem Speichenelement (142, 144) befestigt und koaxial mit der Längsachse (B) der Zuführschnauze (120) ist und ein zusätzliches Rollenlager (129) aufweist, das die Achse (146) und damit die Zuführschnauze (120) trägt.
  3. Beschickungsvorrichtung (100) nach Anspruch 2, dadurch gekennzeichnet, dass die Zuführschnauze (120) eine mechanische Kopplung (160), vorzugsweise eine axial verschiebbare Kopplung, die die Zuführschnauze (120) drehtechnisch mit dem Rotor (108) verbindet, aufweist.
  4. Beschickungsvorrichtung (200) nach Anspruch 1, dadurch gekennzeichnet, dass die Zuführschnauze (220) fest an dem Rotor (208) angebracht ist, der drehbar auf einem Hauptrollenlager (209) getragen ist, so dass das Hauptrollenlager (209) die Zuführschnauze (220) trägt.
  5. Beschickungsvorrichtung (200) nach Anspruch 4, dadurch gekennzeichnet, dass die Zuführschnauze (220) durch einen oder mehrere Querbalken (262, 264), die sich in dem mittleren Durchgang (210) radial erstrecken, fest an dem Rotor (208) angebracht ist, um es Beschickungsmaterial außerhalb des Auslassabschnitts (224) zu gestatten, durch den mittleren Durchgang (210) zu gelangen.
  6. Beschickungsvorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass der feststehende Teil (234) der drehbaren Verbindungsstelle (230) durch ein flexibles Element (280) und mindestens zwei angelenkte Zugstangen (282) flexibel an dem oberen Gehäuseteil (206) angebracht ist, um eine radiale Bewegung der drehbaren Verbindungsstelle (230) relativ zu dem Gehäuse (202) zu gestatten.
  7. Beschickungsvorrichtung (100) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Zuführschnauze (120) aufweist:
    mindestens zwei Speichenelemente (142, 144), die an dem Einlassabschnitt (122) befestigt sind; und
    einen ringförmigen, den Fluss formenden Ring (170), der koaxial mit der Längsachse (B) an den Speichenelementen (142, 144) befestigt ist, um Beschickungsmaterial innerhalb der Zuführschnauze (120) zu halten und umfänglich zu verteilen.
  8. Beschickungsvorrichtung (100) nach einem der Ansprüche 1 bis 7, gekennzeichnet durch eine drehbare Zufuhrleitung (152) und eine drehbare Rückführleitung (153), die sich von dem drehbaren Teil (132) der drehbaren Verbindungsstelle (130) über den Träger (140) und über die Außenseite der Zuführschnauze (120) zu dem Rotor (108) und/oder zu dem Verteilungselement (116) erstreckt, und dadurch gekennzeichnet, dass ein Kühlkreis auf dem Rotor (108) und/oder auf dem Verteilungselement (116) vorgesehen ist, wobei der Kühlkreis (die Kühlkreise) mit der drehbaren Zufuhrleitung (152) und der drehbaren Rückführleitung (153) verbunden ist (sind) und der feststehende Teil (134) der drehbaren Verbindungsstelle (130) mit einer Zufuhrleitung (154) und mit einer Rückführleitung (155) eines feststehenden Kühlkreises verbunden ist.
  9. Beschickungsvorrichtung (200) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das feststehende Gehäuse (202) einen umfänglichen Staubschutzmantel (227) aufweist, der die Zuführschnauze (220) umgibt und mit einem umfänglichen Zwischenraum zwischen dem Mantel (227) und der Zuführschnauze (220) in den Durchgang (210) des Rotors (208) vorsteht, der es dem Beschickungsmaterial gestattet, in den Durchgang (210) des Rotors (208) hinunter zu gelangen.
  10. Beschickungsvorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Träger (140) ferner eine Hohlachse (146) aufweist, die mit der Längsachse (B) koaxial ist und einen unteren Abschnitt aufweist, der an dem Speichenelement (142, 144) über dem Auslassabschnitt (124) befestigt ist, und einen oberen Abschnitt aufweist, der über dem Einlassabschnitt (122) angeordnet ist, wobei der drehbare Teil (132) der drehbaren Verbindungsstelle (130) an dem oberen Abschnitt der Hohlachse (146) befestigt ist.
  11. Beschickungsvorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Auslassabschnitt (124) der Zuführschnauze (120) mit einem ringförmigen Zwischenraum in den mittleren Durchgang (110) des Rotors (108) vorsteht, und zwar auf eine solche Weise, dass der Rotor (108) von Beschickungsmaterial abgeschirmt ist, und zwar vorzugsweise über einen axialen Abstand von mindestens 50% der Höhe des mittleren Durchgangs (110).
  12. Beschickungsvorrichtung (110) nach Anspruch 11, dadurch gekennzeichnet, dass die Zuführschnauze (124) trichterförmig ist und vorzugsweise einen Auslassabschnitt (124) von einer zylindrischen oder sich nach unten verjüngenden Rohrform aufweist, der an einem kegelstumpfförmigen Einlassabschnitt (122) angebracht ist.
  13. Beschickungsvorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
    der Rotor (108) einen Schwenkmechanismus mit zwei Aufhängewellen (156, 158) zum Halten des Verteilungselements (116) schwenkbar um eine Schwenkachse (C), die senkrecht zu der Drehachse (A) ist, aufweist;
    das Verteilungselement (116) eine Verteilungsschurre ist, vorzugsweise eine Verteilungsschurre, die mit einem wassergekühlten Mantel versehen ist, der mit der drehbaren Leitung (152, 154) verbunden ist.
  14. Beschickungsvorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der feststehende obere Gehäuseteil (106) mindestens zwei Beschickungsmaterialeinlässe (112, 114) aufweist, die in Bezug auf die Drehachse (A) versetzt sind.
  15. Beschickungsvorrichtung (100) nach Anspruch 14, dadurch gekennzeichnet, dass zwei Beschickungsmaterialeinlässe (112, 114) sich radial gegenüber liegen und die Zuführschnauze (120) zwei sich radial gegenüber liegende Speichenelemente (142, 144) aufweist.
EP11701398.7A 2010-01-27 2011-01-25 Ladevorrichtung für einen metallurgischen reaktor Active EP2529037B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU91645A LU91645B1 (en) 2010-01-27 2010-01-27 A charging device for a metallurgical reactor
PCT/EP2011/050999 WO2011092165A1 (en) 2010-01-27 2011-01-25 A charging device for a metallurgical reactor

Publications (2)

Publication Number Publication Date
EP2529037A1 EP2529037A1 (de) 2012-12-05
EP2529037B1 true EP2529037B1 (de) 2014-02-12

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EP (1) EP2529037B1 (de)
JP (1) JP5683609B2 (de)
KR (1) KR101630671B1 (de)
CN (1) CN102725426B (de)
LU (1) LU91645B1 (de)
TW (1) TWI529361B (de)
WO (1) WO2011092165A1 (de)
ZA (1) ZA201205442B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014201556A1 (en) 2013-06-17 2014-12-24 Hatch Ltd. Feed flow conditioner for particulate feed materials
LU92581B1 (fr) * 2014-10-22 2016-04-25 Wurth Paul Sa Dispositif de refroidissement des tourillons de support d'une goulotte de distribution d'un four à cuve
CN107120975B (zh) * 2017-07-12 2022-11-15 中冶北方（大连）工程技术有限公司 用于竖式冷却筒冷却工艺的切向回转布料机
LU100535B1 (en) * 2017-12-07 2019-06-12 Wurth Paul Sa Charging system, in particular for a shaft smelt reduction furnace
EP3604560A1 (de) * 2018-08-01 2020-02-05 Paul Wurth S.A. Kühlbox für einen schachtofen
TWI717821B (zh) * 2018-09-06 2021-02-01 日商住友重機械工業股份有限公司 支援裝置、支援方法及支援程式產品

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Publication number Priority date Publication date Assignee Title
US648194A (en) * 1899-09-15 1900-04-24 Alessandro Capra Self-playing piano or organ.
LU59207A1 (de) 1969-07-31 1969-12-10 Wurth Anciens Ets Paul
LU65537A1 (de) 1972-06-16 1972-10-25
JPS54128905A (en) * 1978-03-31 1979-10-05 Nippon Kokan Kk <Nkk> Charging apparatus for raw material to blast furnace top
LU80112A1 (de) 1978-08-16 1979-01-19
JPS5713659U (de) * 1980-06-26 1982-01-23
LU84521A1 (fr) 1982-12-10 1984-10-22 Wurth Paul Sa Dispositif de refroidissement d'une installation de chargement d'un four a cuve
JPS6162782A (ja) * 1984-09-03 1986-03-31 新日本製鐵株式会社 ベルレス炉頂装入装置における旋回コ−ン部構造
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
SE507247C2 (sv) 1996-03-29 1998-04-27 Ssab Oxeloesund Ab Beskickningsanordning för en masugn
LU90294B1 (fr) * 1998-10-06 2000-04-07 Wurth Paul Sa Dispositif de répartition de matières en vrac
LU90794B1 (fr) * 2001-06-26 2002-12-27 Wurth Paul Sa Dispositif de chargement d'un four à cuve
EP1770174A1 (de) 2005-09-30 2007-04-04 Paul Wurth S.A. Vorrichtung zum beschicken eines schachtofens
CN104034173B (zh) * 2009-10-09 2016-03-30 新日铁工程技术株式会社 装入装置

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Publication number Publication date
CN102725426A (zh) 2012-10-10
WO2011092165A1 (en) 2011-08-04
KR101630671B1 (ko) 2016-06-15
JP2013518188A (ja) 2013-05-20
ZA201205442B (en) 2013-09-25
TWI529361B (zh) 2016-04-11
JP5683609B2 (ja) 2015-03-11
CN102725426B (zh) 2014-06-11
TW201144731A (en) 2011-12-16
EP2529037A1 (de) 2012-12-05
KR20120118025A (ko) 2012-10-25
LU91645B1 (en) 2011-07-28

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