WO2013020703A1 - Dispositif de chargement présentant une section de fond interchangeable - Google Patents

Dispositif de chargement présentant une section de fond interchangeable Download PDF

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Publication number
WO2013020703A1
WO2013020703A1 PCT/EP2012/003386 EP2012003386W WO2013020703A1 WO 2013020703 A1 WO2013020703 A1 WO 2013020703A1 EP 2012003386 W EP2012003386 W EP 2012003386W WO 2013020703 A1 WO2013020703 A1 WO 2013020703A1
Authority
WO
WIPO (PCT)
Prior art keywords
charging device
bottom plate
plate
bottom portion
guide
Prior art date
Application number
PCT/EP2012/003386
Other languages
German (de)
English (en)
Inventor
Gerhard Fuchs
Original Assignee
Fuchs Technology Holding Ag
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 Fuchs Technology Holding Ag filed Critical Fuchs Technology Holding Ag
Publication of WO2013020703A1 publication Critical patent/WO2013020703A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/527—Charging of the electric furnace
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
    • 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
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F27D13/002—Preheating scrap
    • 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
    • F27D3/04—Ram or pusher apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention relates to a charging device for charging an arc furnace with feed material, in particular scrap or sponge iron in the form of pellets or briquettes, and a bottom portion of a bottom plate for such a charging device.
  • WO 2010/115619 AI is a charging device for feeding a
  • Arc furnace with feed material known which is configured as a feed preheater.
  • the charging device has a shaft with an outlet opening and a bottom and a slider.
  • the slider may be moved on the floor between a first, retracted, floor releasing position and a second position advanced toward the discharge opening of the charging apparatus.
  • the bottom plate is designed so that a section that has been damaged can be removed from the charging device and replaced with a new or repaired section. As a result, long furnace downtimes are avoided and the repair of the damaged portion of the bottom plate can be done outside the charging device. Further features and expediencies will become apparent from the description of exemplary embodiments with reference to FIGS. From the figures show:
  • FIG. 1 is a schematic side view, partially in section, of an electric arc furnace with a connected charging device
  • FIG. 2 is a schematic front view of a slider and an embodiment of a base plate
  • FIG. 3 is a plan view, partly in section, of the slider and the bottom plate of FIG. 2
  • FIG. 4 is a plan view of a wear plate of the bottom plate of FIG. 2
  • Fig. 5 is a side view, in section, of the wear plate of Fig. 4, and
  • FIG. 6 is a perspective view, partially in section, of an exchangeable portion of the bottom plate of FIG. 2.
  • FIG. 1 shows a schematic side view, partially in section, of a charging device 100.
  • the charging device 100 has a shaft 110 extending in the vertical direction.
  • the shaft 110 has a front shaft wall 111, a rear shaft wall 113 and lateral shaft walls 112 (only one of two lateral shaft walls 112 can be seen in FIG. 1 due to the sectional view).
  • the shaft walls 1 11, 1 12, 113 are formed plate-shaped.
  • the front shaft wall 111 is slightly inclined backwards relative to the vertical.
  • the lateral shaft walls 112 and the rear shaft wall 113 are arranged substantially vertically.
  • the lateral shaft walls 112 are connected to the front shaft wall 1 11 and the rear shaft wall 113 connected.
  • the shaft walls 1 11, 112, 113 are arranged essentially at right angles to one another, so that the shaft 110 has a rectangular cross section in the vertical direction.
  • the shaft walls 111, 112, 13 are held in a frame construction 120.
  • the shaft 110 also has a shaft bottom 300 with a bottom plate 170.
  • the bottom plate 170 is disposed in a lower portion of the duct 110.
  • the lower ends of the lateral shaft walls 112 are each connected to a guide receptacle 125 (see FIG. 2). Between the guide receptacles 125, the bottom plate 170 is arranged.
  • the bottom plate 170 has a bottom plate top 172 and a bottom plate bottom 178.
  • the bottom plate top side 172 and the bottom plate bottom side 178 are flat.
  • the bottom plate 170 is disposed sloping toward the front shaft wall 111.
  • the inclination angle of the bottom plate 170 with respect to the horizontal is about 15 degrees.
  • the shaft 110 also has an inlet opening 130.
  • the inlet opening 130 is arranged horizontally at the upper end of the shaft 110.
  • the inlet opening 130 is bounded by the shaft walls 111, 112, 113.
  • the inlet opening 130 can be closed by a lid 131.
  • the lid 131 is formed horizontally displaceable.
  • the shaft 110 also has an outlet opening 140.
  • the exit port 140 is vertically disposed in a lower portion of the front shaft wall 111.
  • the discharge port 140 extends vertically from a front end of the bottom plate 170 upward.
  • the shaft 110 further includes a gas outlet port 114.
  • the gas outlet port 114 is vertically disposed in an upper portion of the rear shaft wall 113.
  • a gas outlet pipe 117 is connected to the gas outlet port 114.
  • the gas outlet tube 117 extends rearwardly from the gas outlet port 114 and obliquely upward.
  • the shaft 110 also has a slide opening 118.
  • the slider opening 118 is disposed in a lower portion of the rear shaft wall 113.
  • the charging device 100 further includes a slider 150.
  • the slider 150 extends through the slider opening 118.
  • the slider 150 has a top 151, a bottom 152, a transverse end 153, and two longitudinal sides 154, 155 extending in the longitudinal direction.
  • a projection 156 is arranged on the front side 153.
  • the projection 156 extends from the front side 153 forward.
  • the slider 150 is disposed in a slider frame 158.
  • the slider frame 158 is located in the frame structure 120 and is supported in the frame structure 120 by stops projecting transversely from the slider frame 158.
  • the shaft bottom 300 further has a support floor 180.
  • the support floor 180 extends under the slider 150 through the slide opening 118.
  • the support floor 180 connects to a rear transverse side of the floor panels 170 at.
  • the support floor 180 has a support base bottom side 182 and a support floor top side 181.
  • the support floor 180 is connected to the bottom plate 170 to the shaft bottom 300.
  • the support floor 180 has the same angle of inclination as the bottom plate 170.
  • the slider 150 rests with its underside 152 on the support bottom top side 181.
  • the charging device 100 further includes an actuator 157.
  • the actuator 157 is disposed in a rear portion of the slider 150 and protrudes rearward from the slider 150.
  • the actuating device 157 has at least one hydraulically actuated lifting cylinder and a lifting rod.
  • the charging device 100 further includes a horizontal axis pivot bearing 183.
  • the horizontal axle pivot bearing 183 is arranged on a rear transverse side slider frame 158 and has a horizontally extending pivot axis.
  • a rear end of the actuator 157 is connected to the horizontal axis pivot bearing 183.
  • a front end of the actuator 157 is connected to the slider 150 via a horizontal axis pivot bearing (not shown).
  • the shaft 110 further includes an upper boundary portion 121 formed as a beam.
  • the upper boundary part 121 is arranged above the outlet opening 140.
  • the upper limiting element 121 limits the outlet opening 140 in the vertical direction.
  • the Upper boundary portion 121 is by means of hydraulic linear actuators (not shown) in the vertical direction movable, ie formed raised and lowered.
  • the charging device 100 further comprises rollers 122.
  • the charging device 100 has four rollers 122 (only two out of four rollers 122 can be seen in FIG. 1 due to the sectional view).
  • the rollers 122 are mounted in chassis 124.
  • the rollers 122 are arranged on rails 123.
  • the rails 123 extend horizontally on a floor (not shown) on which the charging device 100 is disposed.
  • the arc furnace 200 is conventionally constructed as an AC or DC furnace, and therefore, no details are described here.
  • the arc furnace 200 includes a furnace vessel 201 having a lower vessel portion 202 in operation with a molten pool 240 and an upper vessel portion 203 and a lid 204 defining an interior space.
  • the upper vessel part 203 has a wall 260.
  • the wall 260 has an inlet opening 250. Around the inlet opening 250, a projection 210 extends horizontally outward.
  • the discharge port 140 faces the entrance port 250.
  • the outlet opening 140 has substantially the same dimensions as the inlet opening 250.
  • Fig. 2 shows a schematic front view of the slider 150 and the bottom plate 170 in the direction F of the plane of the shaft bottom 300.
  • the slider 150 has downwardly converging longitudinal sides 154, 155 having a converging angle ⁇ .
  • the convergence angle ⁇ of the longitudinal sides 154, 155 with respect to the horizontal is 45 degrees.
  • the bottom plate 170 has stepped longitudinal sides. An upper side 172 of the bottom plate 170 is longer in the transverse direction than the lower side 178 of the bottom plate 170 in the transverse direction.
  • FIG. 2 also shows the two guide seats 125 connected to the lower ends of the side shaft walls 112 (not shown).
  • the guide receivers 125 are arranged opposite one another in the transverse direction and parallel to one another in the longitudinal direction.
  • Each guide receptacle 125 has a lower guide wall 126 in a lower area.
  • the lower guide wall 126 is stepped inwardly and downwardly.
  • each guide Receiving 125 in an upper region an upper guide wall 127 on.
  • the upper guide wall 127 is formed obliquely inwardly and downwardly.
  • the guide frames 125 are disposed laterally along the bottom plate 170 and the slider 150 and form a guide channel 128.
  • the bottom plate 170 and the slider 150 are disposed between the guide frames 125.
  • the bottom plate 170 is disposed at a lower portion of the guide channel 128.
  • the slider 150 is disposed on the bottom plate 170 resting in an upper portion of the guide channel 128. In the assembled state are the lower guide walls 126 and the upper guide walls 127 of the two guide frames
  • the stepped shape of the lower guide walls 126 is complementary to the stepped longitudinal sides of the bottom plate 170.
  • the oblique shape of the upper guide walls 127 is complementary to the converging longitudinal sides 154, 155 of the slider 150.
  • FIG. 3 shows a plan view of the bottom plate 170 and the slider 150 of FIG. 2.
  • the slider 150 is shown in a first, retracted position releasing the bottom plate 170 as in FIG.
  • the charging device 100 has a drainage plate 161.
  • the drain plate 161 is disposed at a front end of the bottom plate 170 below the bottom plate 170.
  • the drain plate 161 has a trapezoidal configuration.
  • the drain plate 161 is arranged such that the width of the trapezium widens rearwardly from the front end of the bottom plate 170.
  • the sides of the drainage plate 161 that are not parallel to each other project transversely beyond the bottom plate 170.
  • the slider 150 has a vertical axis pivot bearing 184 in its front portion.
  • the vertical axis pivot bearing 184 has a perpendicular to the viewing direction F pivot axis.
  • the projection 156 has a substantially rectangular shape in plan view, wherein the front transverse side has a recess extending approximately over the entire transverse side.
  • the bottom plate 170 has an exchangeable bottom portion 171.
  • the replaceable bottom portion 171 is located at the foremost end of the bottom plate 170.
  • the replaceable bottom portion 171 has a top 173 and a bottom 177.
  • the upper side 173 and the lower side 177 of the exchangeable base section 171 are planar and arranged in the same plane as the upper side 172 or the lower side 178 of the base plate 170.
  • the replaceable bottom portion 171 extends across the entire width of the bottom plate 170 in the transverse direction.
  • the bottom plate 170 and the exchangeable bottom portion 171 have wear plates 190.
  • the replaceable bottom portion 171 has seven wear plates 190.
  • the wear plates 190 are arranged on the upper side 173 of the exchangeable bottom section 171 and transversely side by side on the exchangeable bottom section 171. If the bottom plate 170 and the exchangeable bottom portion 171 are provided with wear plates 190, the top of the wear plates 190 forms the top of the bottom plate 170 and the exchangeable bottom portion 171, respectively.
  • Each wear plate 190 has a substantially rectangular shape. Furthermore, each wear plate 190 has at its rear end at least one guide recess 191 and at least one guide projection 192.
  • the at least one guide projection 192 of a wear plate 190 disposed on the replaceable bottom portion 171 engages the at least one guide recess 191 of a wear plate 190 disposed on the remainder of the bottom plate 170 to compensate for longitudinal expansion by longitudinal thermal expansion one.
  • the distance is usually a few cm, for example 2.5 to 5 cm for a wear plate made of steel with a thermal expansion coefficient of 12 x 10 ⁇ 6 K _1 and a length of the plates of about 4 m and about 500 K temperature. At higher temperatures, such as 600 K and 700 K, the distance can be 3 to 5.5 cm or 3.5 to 6 cm.
  • the guide projections 192 in the transverse direction of the bottom plate 170 are arranged alternately to the guide recesses 191.
  • the laterally juxtaposed wear plates 190 form a transversely extending engagement line in a rectangular serrated shape (see FIG. 3), which is a longitudinal expansion joint 196.
  • 4 shows a plan view of a wear plate 190. As shown in FIGS. 3 and 4, the wear plate 190 has eighteen through holes 193.
  • the eighteen through holes 193 of the wear plate 190 are disposed in two longitudinally extending parallel tracks on the wear plate 190.
  • the through holes 193 have a square cross section.
  • the first two distances between the through holes 193 are shorter in the longitudinal direction than the following six distances between the through holes 193.
  • the through holes 193 which have a smaller distance from each other, at a front end of the exchangeable bottom portion 171st
  • Fig. 5 shows a longitudinal section through a wear plate 190.
  • the longitudinal section extends through one of the tracks of through holes 193.
  • holding elements 194 are introduced.
  • the holding members 194 are L-shaped and welded to the wear plate 190 at an upper edge of the through holes 193 and a lower edge of the through holes 193.
  • the holding elements 194 project downwardly from the wear plate 190.
  • Fig. 6 shows a perspective view of the exchangeable bottom portion 171 (without wear plates 190).
  • the upper side 173 of the exchangeable bottom section 171 has fourteen tracks, each with nine slots 174.
  • the elongated holes 174 have a rectangular shape and extend in the longitudinal direction of the exchangeable bottom section 171. In a front region of the exchangeable bottom section 171, the first two distances between the oblong holes 174 are shorter than the following six distances between the oblong holes 174 Slotted holes 174 are thus complementary to the introduced into a wear plate 190 holding elements 194. When installed, the short, horizontally extending parts of the L-shaped holding elements 194 point to the rear.
  • thermal expansions in the longitudinal direction can be compensated in that the holding elements 194 can move in the oblong holes 174 in the forward direction.
  • the securing elements may be formed, for example, as blocks with parallelepiped shape and may be arranged in the free space of the elongated holes 174 in front of the holding elements 194 in the state arranged on the bottom plate 170.
  • the two holding elements 194 located at the rear end of the exchangeable bottom section 171 are preferably loaded with the securing elements 194 to the rear.
  • the remaining holding elements 194 can move in thermal expansion of the wear plate 190 in the free spaces of the slots 174 forward.
  • the replaceable bottom portion 171 also has two openings 175 each on the longitudinally extending longitudinal sides. Each opening 175 has a circular cross-section.
  • the apertures 175 are adapted to be able to insert fasteners 176, such as bolts (a bolt exemplarily shown in FIG. 6).
  • the bolts may be inserted from outside to inside through the left and right guide slots 125 through the openings 175.
  • the guide recesses 125 corresponding openings or holes (not shown), which extend in the transverse direction through each Füliixmgsaumahme 125.
  • the interchangeable bottom portion 171 further has inside transversely and longitudinally extending inner walls 179 so that the interchangeable bottom portion 171 is internally divided into a plurality of chambers. Furthermore, the exchangeable bottom section 171 has a cooling device 160 in the interior.
  • the cooling device 160 is arranged at least in a part of the chambers.
  • the cooling device 160 is formed as a longitudinally extending tube.
  • the cooling device 160 is provided with a plurality of holes for discharging a cooling medium, such as water.
  • the cooling medium used for cooling the replaceable bottom portion 171 is supplied through a hose (not shown) attached to the underside of the exchangeable bottom portion 171.
  • the cooling device 160 is designed as a spray cooling device.
  • the shaft 1 10 may also have other shaft walls for other manhole shapes.
  • the shaft walls can, for example, also be designed such that the shaft 110 has a transverse has oval or rounded or polygonal shape.
  • the walls can also be formed completely perpendicular. But preferred is a shaft extending downward shape.
  • the actuator 157 may also be electrically or pneumatically actuated. Furthermore, the actuating device 157 may also have a plurality of actuating cylinders, which are pivotable via corresponding horizontal axle pivot bearings 183 and corresponding vertical axis pivot bearings 184.
  • the discharge opening 130 can also be arranged in an upper region of a front or rear shaft wall 111, 113.
  • the cover 131 does not have to be designed to be linearly displaceable, but it can also be designed to be pivotable or liftable by crane.
  • the outlet opening 140 may also be arranged horizontally in a lower region of the charging device 100.
  • the bottom plate 170 may also be arranged horizontally in the charging device 100.
  • the angle of inclination of the bottom plate 170 with respect to the horizontal may be in a range between 5 ° and 10 °, 10 ° and 15 °, 15 ° and 20 °, 20 ° and 25 °, 25 ° and 30 °, 30 ° and 35 ° or 5 °, 10 °, 15 °, 20 °, 25 °, 30 °, 35 °.
  • the bottom plate 170 instead of the stepped shape in cross-section, may also have a linearly or curved downwardly tapering shape in cross section. Accordingly, then the lower guide walls 125 of the guide receptacles 125 also have a linear or curved shape corresponding to the linear or curved downwardly tapered shape of the bottom plate 170 in cross section.
  • the replaceable bottom portion 171 may be any part of the bottom plate 170.
  • only a front, on top of the bottom plate 170 left, center or right part of the bottom plate 170 may be formed as an exchangeable bottom portion 171.
  • a left-rear, central or right-hand part of the bottom plate 170 which is offset from the front side of the bottom plate 170 and which is top view of the bottom plate 170, can also be designed as an exchangeable bottom section 171.
  • the bottom plate 170 may also be divided into a plurality of different replaceable bottom sections 171, so that, depending After which part or parts of the bottom plate 170 are damaged, a corresponding replaceable bottom portion 171 or a plurality of corresponding replaceable bottom portions 171 can be removed from the bottom plate 170.
  • the at least one replaceable bottom section 171 is fastened to at least one guide receptacle 125 by means of fastening means 176, such as, for example, bolts, clamps or hooks.
  • fastening means 176 such as, for example, bolts, clamps or hooks.
  • each guide receptacle 125 can have a bore extending transversely through the guide receptacle 125, which is designed to pass through the fastening means 176 from the outside to the inside in order to produce the detachable connection.
  • the lower guide wall 126 of each guide receptacle 125 may include hooks or clamping mechanisms that engage the replaceable bottom portion 171.
  • At least one wear plate 190 which extends over the entire exchangeable bottom portion 171, may be arranged. Likewise, at least one wear plate 190 may be arranged on the part of the bottom plate 170 which is not replaceable.
  • the through holes 193 formed in each wear plate 190 may be more or less than eighteen through holes 193.
  • the through holes 193 may also be round or polygonal. In particular, the number of through holes 193 introduced into the different wear plates 190 may differ.
  • the holding members 194 disposed in the through holes 193 may take any form suitable for holding the wear plate 190 on the bottom plate 170 and / or the replaceable bottom portion 171. For example, instead of the L-shaped retaining elements 194, bolts or snap-in devices may also be used as retaining elements 194.
  • the cooling device 160 can also be arranged outside the exchangeable bottom section 171 in the charging device 100.
  • the projection 156 may also be formed of a plurality of cleat plates, which are arranged side by side in the transverse direction on the end face 153 of the slider 150.
  • the convergence angle ⁇ the longitudinal side 154, 155 of the slider 150 is preferably between 45 degrees and 75 degrees, for example 60 degrees.
  • the cover of the charging device 100 is displaced to the side and feed material is filled via the inlet opening 130 into the shaft 110. If the charging device 100 is unfilled at the beginning of Befullungsbeginn, the slider 150 is in the first, the bottom plate 170 releasing position. Thus, the slider 150 is also guided and held in the retracted first position, the support base 180 is disposed directly to the bottom plate 170 then behind this. When the slider 150 is in the first position, the charging material falls on the bottom plate 170. The falling loading material may damage the bottom plate 170. Gradually filled feed material no longer directly impacts the bottom plate 170, but forms a feedstock column thereon.
  • the slider 150 is provided on the slider bottom 152 with rollers (not shown) and is interposed between the retracted first position (FIG. 1) releasing the bottom plate 170 and the second position (not shown) advanced toward the outlet port 140 by means of FIGS Actuator 157 displaced. In the first position, the slider 150 rests on the support floor 180. In the second position, the slider 150 rests on the bottom plate 170. When loading the arc furnace 200 with charging material, the slider 150 is moved back and forth by the actuator 157. With the end face 153 and the protrusion 156, the spool 150 transports feed material toward the exit opening 140.
  • the feed material is conveyed through the exit opening 140 into the arc furnace 200 where the feed material is subsequently melted.
  • the upper limit of the outlet opening 140, the raised and lowered upper boundary portion 121 is provided.
  • feed material may enter between the slider 150 and the guide receptacle 125 or the bottom plate 170.
  • This feed material abuts the slider bottom 152 and / or the downwardly converging longitudinal sides 154, 155 of the slider 150 and pushes the slider 150 after above.
  • the slider 150 can make an evasive upward movement.
  • the slide 150 can also escape laterally through the vertical axis pivot bearing 184. Thereby, jamming or blockage of the slider 150 can be avoided by feed material entering between the slider 150 and the guide receiver 125 and / or the bottom plate 170.
  • the stops which protrude in the transverse direction of the slider frame 158, a movement of the slider frame 158 in the direction F is avoided, a movement in the vertical direction of the slider frame 158 but allows.
  • the charging device 100 serves not only to supply charging material but also to preheat charging material in the charging device 100.
  • hot gas which is formed during melting of the feed material in the arc furnace 200, through the inlet opening 250 and the outlet opening 140 into the shaft 110 and the gas outlet port 1 14 and the gas outlet tube 117 again out of the charging device 100 or derived. Due to the preheating, the charge material has temperatures of up to 500 ° C.
  • the heat of the charge material resting on the bottom plate 170 may also damage the bottom plate 170.
  • the hot feed material may result in deformation of the top of the bottom plate 170.
  • the charging device 100 To repair the bottom plate 170, the charging device 100 is required to be disabled. Stopping the operation of the charging device 100 also means stopping the operation of the arc furnace 200. To the furnace downtime and thus In order to minimize the economic losses due to the repair process, the bottom plate 170 is not repaired within the charging device 100, but only the damaged part of the bottom plate 170, a so-called exchangeable bottom section 171, is removed from the charging device 100 and a new replaceable bottom section 171 used.
  • the removal of the replaceable bottom portion 171 is usually carried out via the shaft 110, but can also take place through the outlet opening 140.
  • the exchangeable bottom section 171 Before exchanging the exchangeable bottom section 171, the exchangeable bottom section 171 is first cooled. Due to the fact that the inner walls 179 divide the interior of the exchangeable floor section 171 into a plurality of chambers, the exchangeable floor section 171 is not only stiffened but at the same time provides space for arranging further devices inside the exchangeable floor section 171, such as a cooling device 160.
  • the cooling device 160 cools the replaceable bottom portion 171 by spraying the replaceable bottom portion 171 inside with the cooling medium.
  • the cooling medium is discharged via a drain plate 161 and a drip pan (not shown) arranged in the chassis 124.
  • the hose that supplies the cooling device 160 with the cooling medium is released from the charging device 100 and the connection between the charging device 100 and the arc furnace 200. Then, using the rollers 122 in the chassis 124, the charging apparatus 100 is displaced a few meters, for example two meters, horizontally from the arc furnace 200 on the rails 123 rearwardly.
  • an appropriate number of suspensions are attached to the replaceable bottom portion 171.
  • four suspensions are welded to the replaceable bottom section 171.
  • the suspensions are for striking crane hooks (not shown) or the like.
  • the replaceable bottom section 171 is lifted out of the charging device 100 by means of a crane through the shaft 110.
  • the replaceable bottom portion 171 When the replaceable bottom portion 171 is removed from the charging device 100, the replaceable bottom portion 171 outside the charging device 100 is discharged at a suitable location for repairing the replaceable bottom portion 171, released from the crane hooks, and repaired. If wear plates 190 are arranged on the exchangeable bottom section 171, the damaged wear plates 190 are removed and replaced by new wear plates 190.
  • each wear plate 190 is moved in the direction of the front.
  • the attached to the respective wear plate 190 L-shaped holding elements 194 are moved in the slots 174 forward, so that the L-shaped support members 194 no longer engage under the top 173 of the interchangeable bottom portion 171.
  • the holding members 194 are displaced forward, the horizontal parts of the L-shaped holding members 194 are guided through the through holes 193.
  • the wear plates 190 are removed from the removable bottom portion 171 upwards and replaced by new wear plates 190.
  • the steps for installing the new wear plates 190 occur in reverse order to the above-described steps in removing the wear plates 190.
  • a new replaceable bottom section 171 can be inserted through the shaft 110 into the charging device 100 by means of the crane.
  • the new interchangeable floor section 171 also has suspensions. If the new exchangeable bottom section 171 has wear plates 190, the at least one guide projection 192 engages in the at least one guide recess 191 and thus helps to align the replaceable bottom section 171 with the bottom plate 170 remaining in the charging device 100. As soon as the new interchangeable bottom section 171 is inserted into the charging device 100, the suspensions are removed, the charging device 100 is again shifted in the direction of the arc furnace 200 and the operation of the arc furnace 200 is continued.
  • the stepped, linear or curved lower guide walls 126 of the ceremoniessaufiiahmen 125 serve to guide the new interchangeable bottom portion 171 when it is inserted from above between the matterssaufhahmen 125.
  • the inclined upper guide walls 127 of the guide receivers 125 serve to guide the slider 150 as it is moved back and forth during operation of the charging apparatus 100.
  • the new replaceable bottom portion 171 is inserted into the bottom plate 170 such that the wear plates 190 of the exchangeable bottom portion 171 are spaced from the wear plates 190 of the remaining bottom plate 170. This allows the wear plates 190 to expand during operation of the arc furnace 200 by the heat generated in the shaft 110.
  • the above-described replacement of the exchangeable bottom portion 171 takes about half an hour and significantly reduces the furnace downtime associated with the repair of the bottom panel 170.
  • long furnace downtime can be avoided and an optimal economic operation of the charging device 100 and the arc furnace 200 can be ensured.
  • the repair of the damaged part of the bottom plate 170 outside the charging device 100 is simplified.
  • the replaceable bottom section 171 has at least one wear plate 190, which is held on at least one holding element 194 on an upper side 173 of the exchangeable bottom section 171.
  • the replaceable bottom section 171 has at least one wear plate 190, which is held on at least one holding element 194 on an upper side 173 of the exchangeable bottom section 171.
  • the upper side 173 of the exchangeable bottom section 171 has at least one oblong hole 174.
  • the at least one retaining element 194 is L-shaped and engages in the at least one slot 174 a. During operation of the arc furnace 200, the at least one retaining element 194 may move longitudinally in the elongated holes 174 and thus compensate for thermal expansion of the wear plate 190. Furthermore, the at least one wear plate 190 can be quickly and reliably arranged on the exchangeable bottom section 171 by means of the at least one L-shaped holding element 194.
  • the at least one wear plate 190 has at least one guide projection 192 and at least one guide recess 191 on at least one side of the first wear plate 190. Thus, when replacing the replaceable bottom portion 171, it is ensured that a plurality of wear plates 190 are exactly aligned with each other.
  • first and second wear plates 190 are spaced from each other.
  • the first and second wear plates 190 may additionally expand by the heat generated during operation of the arc furnace 200.
  • the charging device 100 further comprises a cooling device 160, which is designed to cool the exchangeable bottom portion 171 of the bottom plate 170 with the cooling medium.
  • a cooling device 160 which is designed to cool the exchangeable bottom portion 171 of the bottom plate 170 with the cooling medium.
  • the cooling device 160 is arranged in the interior of the exchangeable bottom section 171. This space-saving arrangement of the cooling device 160 enables efficient cooling of the exchangeable bottom section 171.
  • the replaceable bottom portion 171 is detachably connected via fastening means 176 with at least one of the guide receptacles 125. This ensures an easy-to-install and easy-to-release connection between the replaceable bottom portion 171 and the at least one guide receptacle 125th
  • the width of the exchangeable bottom section 171 extends transversely to the side walls 112 of the shaft 110.
  • the underside of the exchangeable bottom section 171 has a smaller width than the top of the replaceable bottom section 171. As a result, the exchangeable bottom section 171 is guided or centered during the simpler changeover procedure during insertion become.

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  • 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)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

L'invention concerne un dispositif de chargement (100) pour alimenter un four à arc (200) par une matériau de charge. Ce dispositif comprend une cuve (110) ayant des parois latérales (112) et une plaque de fond (170), et une ouverture de sortie (140) dans une paroi avant (111) orienté vers le four à arc (200). En outre, le dispositif de chargement (110) comprend un bélier (150), qui est mobile sur un côté supérieur (172) de la plaque de fond (170) entre une première position retirée libérant la plaque de fond (170) et une deuxième position avancée dans la direction de l'ouverture de sortie (140). Dans le dispositif de chargement (100), deux logements de guidage (125) s'étendent opposés l'un par rapport à l'autre sur le côté de la plaque de fond (170). La plaque de fond (170) comprend au moins une section de fond (171) interchangeable. La ou les sections de fond (171) interchangeables sont reliées de façon amovible avec au moins l'un des logements de guidage (125).
PCT/EP2012/003386 2011-08-09 2012-08-08 Dispositif de chargement présentant une section de fond interchangeable WO2013020703A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011109860A DE102011109860A1 (de) 2011-08-09 2011-08-09 Chargiervorrichtung mit auswechselbarem Bodenabschnitt
DE102011109860.0 2011-08-09

Publications (1)

Publication Number Publication Date
WO2013020703A1 true WO2013020703A1 (fr) 2013-02-14

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PCT/EP2012/003386 WO2013020703A1 (fr) 2011-08-09 2012-08-08 Dispositif de chargement présentant une section de fond interchangeable

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103978146A (zh) * 2014-05-30 2014-08-13 北京北方车辆集团有限公司 一种改进的防损加热炉

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3219984A1 (de) * 1981-05-30 1983-01-13 Daido Tokushuko K.K., Nagoya, Aichi Verfahren zur herstellung von eisen in einem reaktor und vorrichtung zur durchfuehrung des verfahrens
WO1994024506A1 (fr) * 1993-04-15 1994-10-27 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Appareil de prechauffage et d'alimentation en ferrailles
WO2005052481A1 (fr) * 2003-11-27 2005-06-09 Fuchs Technology Ag Dispositif de chargement, notamment dispositif de prechauffage des charges
WO2010115619A1 (fr) 2009-04-07 2010-10-14 Fuchs Technology Holding Ag Dispositif de chargement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1993950U (de) * 1959-04-08 1968-09-19 Schulte Fa D W Drehherd fuer industrielle drehherdoefen.
US5078594A (en) * 1991-01-28 1992-01-07 Cadence Chemical Resources, Inc. Device for charging combustible solids to rotary kilns
DE10305113A1 (de) * 2003-02-07 2004-08-19 Polysius Ag Belüftungselement für einen Kühler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3219984A1 (de) * 1981-05-30 1983-01-13 Daido Tokushuko K.K., Nagoya, Aichi Verfahren zur herstellung von eisen in einem reaktor und vorrichtung zur durchfuehrung des verfahrens
WO1994024506A1 (fr) * 1993-04-15 1994-10-27 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Appareil de prechauffage et d'alimentation en ferrailles
WO2005052481A1 (fr) * 2003-11-27 2005-06-09 Fuchs Technology Ag Dispositif de chargement, notamment dispositif de prechauffage des charges
WO2010115619A1 (fr) 2009-04-07 2010-10-14 Fuchs Technology Holding Ag Dispositif de chargement
DE102009016774A1 (de) * 2009-04-07 2010-10-14 Fuchs Technology Holding Ag Chargiervorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103978146A (zh) * 2014-05-30 2014-08-13 北京北方车辆集团有限公司 一种改进的防损加热炉

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