Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C17/00—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports
  • B66C17/06—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports specially adapted for particular purposes, e.g. in foundries, forges; combined with auxiliary apparatus serving particular purposes
  • B66C17/10—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports specially adapted for particular purposes, e.g. in foundries, forges; combined with auxiliary apparatus serving particular purposes for transporting ladles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
  • B22D41/12—Travelling ladles or similar containers; Cars for ladles
• • 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
  • C21C5/28—Manufacture of steel in the converter
  • C21C5/42—Constructional features of converters
  • C21C5/46—Details or accessories
  • C21C5/4686—Vehicles for supporting and transporting a converter vessel
• • 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
  • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
  • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle

Definitions

• the invention relates to a device and a method for lifting a ladle. Furthermore, the invention relates to a plant for the treatment of liquid metal, in particular a plant for degassing of liquid metal such as a Ruhrstahl - Heraeus plant. The invention further relates to a method for changing a treatment device.
• a known treatment method is, for example, the degassing of liquid metal in order to remove residues of oxygen and / or other gases from the molten metal.
• This process is usually carried out in an RH plant (Ruhrstahl-Heraeus plant).
• the liquid metal in a so-called Stahlg screenpfanne (hereinafter referred to as pan) positioned below a treatment facility.
• the treatment device for example a vacuum vessel, has at least one inlet on its underside. To treat the liquid metal in the pan, it is introduced through the inlet into the treatment device. As a rule, the liquid metal is sucked through the inlet into the interior of the treatment device.
• the pan must be raised a little way up, so that at the bottom of the inlet during treatment no air penetrates.
• the metal is treated, in particular degassed, and flows back into the pan after the treatment process.
• the pan is usually lifted with a device for lifting a pan in the direction of the treatment device and lowered down again after treatment.
• WO 2012000218 A discloses a ladle lifting system comprising a frame structure, which by means of hydraulic cylinders is raised.
• the frame construction, as well as the filled with liquid metal pan itself, has a high weight and requires correspondingly powerful designed lifting cylinder.
• the object of the invention is to provide a flexible and inexpensive device and a method suitable for lifting a pan. It is another object of the invention to provide an easy-to-maintain system comprising such a device.
• the object is achieved by means of a device for lifting a pan for the treatment of liquid metal in the Pfan ne by means of a treatment device, wherein the device has two, movably mounted on at least three metal struts, crossbar, wherein the metal struts at one end for fixing in a substrate are provided, wherein the crossbars on each two of the metal struts are movable in the vertical direction, wherein the crossbar each having a pan receiving element, by means of which the pan is receivable, wherein at least one positioning means is provided for aligning the pan receiving element, wherein for positioning the crossbar each at least one positioning element is provided, wherein each positioning element on the one hand either on one of the metal struts can be fastened and / or set up and / or fixable on the ground and on the other hand is fixed to one of the crossbar, de that a change in position of the ladle can be effected by means of the transverse bars, and in which the transverse bars are arranged independently of one another
• a system comprising a device according to the invention for lifting a pan and furthermore a treatment device, wherein the treatment device is releasably secured to the at least three metal struts.
• the device for lifting the pan forms part of a plant for the treatment of liquid metal.
• the device for lifting the ladle is in particular suitable for being integrated into an already existing system not according to the invention, in particular into a system for the treatment of liquid metal, in order to produce a system according to the invention.
• the device according to the invention and a system equipped therewith have the advantage that, in comparison with known devices, the weight to be lifted is markedly reduced and therefore smaller-sized positioning elements with reduced energy requirement can be used. While heavy and inflexible frame constructions are used in the prior art, lightweight and independently movable cross bales are used here, which themselves and their positioning elements can be independently maintained or replaced.
• the metal struts are usually vertical and are attached to a substrate, preferably with the help of a foundation.
• Each two metal struts is assigned a crossbar.
• one of the metal struts is assigned two crossbeams.
• the crossbars extend in an arrangement of the three metal struts at the tips of a triangle, viewed perpendicularly from above, at an angle to each other.
• four metal struts serve as the basic framework.
• the crossbars, viewed from above, are preferably aligned parallel to one another.
• the treatment device can be fixed in the upper region of the metal struts and fixed during the operation of the treatment device.
• the treatment device has on its underside at least one inlet opening and at least one outlet opening. Into the inlet opening (s) flows the treatment intended for treatment. insert liquid metal into a treatment room, and out through the outlet opening.
• the inlet opening is modeled after a proboscis in its shape.
• the crossbars are independently positionable in the vertical position.
• Optional guide elements at the ends of the crossbars can be advantageously used to reduce the friction between the crossbar and metal struts during vertical positioning of the crossbars. The guide elements are still located in particular at the contact areas of the crossbar and the metal struts.
• the pan receiving elements can be aligned by means of the positioning means.
• the pan receiving elements serve to receive the pan, for fixing the pan on the respective crossbar and for settling the pan, especially on a provided trolley.
• the pan receiving elements for horizontal positioning of the pan can be used by the pan receiving elements including the pan are raised by the positioning elements to the desired stroke position.
• the positioning elements are used for vertical positioning of the crossbars.
• the positioning elements are advantageously attached to the metal struts themselves.
• the vertical positioning of the crossbars takes place independently of each other.
• positioning elements as positioning elements as well as for aligning the Pfannenauf- receiving elements are advantageously selected as a positioning means hydraulic cylinder or cable systems.
• suitable positioning elements or means include a motor, a gear and one or more racks, wherein the gear is provided for toothing with the racks and is driven by the motor.
• the gear-equipped motor is equipped with a releasable brake, which prevents a downward movement of the crossbar in case of failure of the supply voltage.
• a brake advantageously prevents only the rotation of the motor in one direction and can be switched on and off.
• a motor-operated positioning element saves the hydraulic control and, if appropriate, can be integrated more easily into a control device of the system for the treatment of liquid metal.
• the stress on the metal struts is reduced and the metal struts are additionally reinforced by the attachment of toothed racks to the metal struts.
• a system according to the invention comprises a transport system.
• the transport system is used in particular for transporting the pan by means of suitable rolling carriages towards the device or away from it.
• the crossbars each have at least one movable treatment device receiving element, wherein the treatment device with the help of the specialistsss wornsaufnah- mme elements on the two crossbar is receivable.
• the treatment facility is controlled by the treatment facility receiving elements is releasably connectable to the crossbars and wherein the treatment device is variable in its vertical position by means of the positioning elements for vertical positioning of the two crossbars.
• the object is achieved by a method for lifting a ladle with liquid metal, the ladle being raised by means of the device according to the invention for lifting the ladle so far that the liquid metal in the ladle can be treated by means of the treatment device.
• the pan in particular by means of a trolley and using a transport system, to position below the treatment device. Then take the pan-receiving elements handle elements on the pan and connect the pan releasably connected to the crossbars of the device. Then the crossbars are moved by means of the positioning elements up until the pan reaches the sphere of action of the treatment device. After the treatment of the liquid metal in the pan, the
• An above-described method for lifting a pan is to operate energy-efficient by the low weight of the device. Due to the low weight to be lifted also the performance of the positioning elements is smaller dimensioned.
• the object is achieved by a method for changing a treatment device of the system, wherein by means of a device for raising a pan, the treatment device is received by the treatment device receiving elements and the metal struts and / or the Cross struts is solved, by means of the positioning elements, the cross bar and thus the treatment device is placed down on a waiting trolley, being replaced by means of trolley and the transport system, the treatment device against another treatment device, the other treatment device is received by the treatment device receiving elements and is positioned with the device in the original position of the treatment device and wherein the other treatment device is attached to the metal struts and / or the cross struts.
• the treatment device is advantageously releasably attached to the metal struts by means of fastening means. Such a connection can be released in a simple manner after lifting the treatment device for weight relief of the fastening means and subsequent release of the fastening means.
• the combination of the two functions of one hand lifting and lowering the pan and on the other hand the possibility of changing a treatment device contribute to a cost-effective and flexible operation of a system according to the invention.
• the simple and rapid change of the treatment device is advantageous, since dead times of a plant for the treatment of liquid metal often represent a significant cost factor in the operation of such a system.
• Hydraulic cylinders for positioning the transom have the advantage that in the event of a technical fault or a failure of the power supply of the device, a controllable movement to a starting position can be triggered. Hydraulic cylinders and other positioning elements are easily fixable to the metal struts, for example by means of an angular support element and optionally further fastening means which connect the positioning element with the corresponding metal strut.
• Hydraulic cylinders can be fixed in a simple manner in their position, for example, by a manually operated hydraulic valve. Furthermore, hydraulic cylinders are low maintenance and can also be used in heavily soiled areas.
• An advantageous method of attachment is in particular a suspension connection, wherein a shaped element is introduced into an opening provided for this purpose from above and, when the treatment device is suspended, a stable but releasable connection is made by lifting it.
• the treatment device receiving elements are aligned with further positioning elements, preferably with hydraulic cylinders.
• a separate control or regulating device is provided for each positioning element and / or each positioning means.
• Coordinate moving means in the case of tilting and / or a different type of disorder in the operation of the device, a manual adjustment of a single positioning element is a simple way of troubleshooting.
• the control devices are connected to each other for the purpose of easy operation. Only in the case of a malfunction in the operation of a coordinated control or regulation is not possible and each of the positioning elements must be controlled individually.
• Such a control advantageously increases the flexibility and lowers the maintenance costs that occur for the device for raising a ladle and / or the system.
• the treatment device receiving elements are also advantageous supplemented by additional support elements. These support elements are advantageously fastened to the respective crossbeam and serve, in particular, for securing the accommodated treatment device, if one of the further positioning elements, in particular at
• Hydraulic cylinders fail during operation.
• the treatment device for degassing liquid metal is provided, wherein the treatment device is a vacuum vessel.
• FIG. 2 shows a device for lifting a pan according to FIG. 1,
• FIG. 3 shows a schematic sketch of another system
• FIG. 4 shows a schematic sketch of a further device
• FIG. 6 shows the further embodiment of the system according to FIG. 5 during the reception of the treatment device, FIG.
• FIG 7 shows the further embodiment of the system according to FIG 5 with the recorded and lowered treatment device
• the plant 100 shows a possibility for positioning the crossbar 1 shows a plant 100 for the treatment of liquid metal 8 in a three-dimensional view.
• the plant 100 has a device 1 for lifting a pan 9.
• the plant 100 comprises the device 1 with four metal struts 2, the treatment device 3, two transverse bars 5, four positioning elements 4 in the form of hydraulic cylinders, two pan receiving elements 7 and two treatment vessel receiving elements 21.
• the treatment device 3 has an inlet opening 13 and an outlet opening 13 'at its Bottom on.
• the crossbars 5 are variable by means of the positioning elements 4 in its vertical position.
• the pan 9 is located below the treatment device 3 on a trolley 17.
• the pan 9 has two handle elements 11. On each transverse bar 5 is in each case a pan receiving element 7 fastened.
• the illustration shows the pan-receiving elements 7 hooked into the handle elements 11 of the pan 9.
• the metal struts 2 are advantageously firmly connected by a foundation with the substrate 20.
• the crossbars 5 are connected via guide elements 12 with the metal struts 2.
• the guide elements 12 are fastened laterally to the two ends of the crossbars 5 and at least partially encase the metal struts 2.
• the positioning elements 4 rest on the substrate 20.
• the positioning elements can also be arranged on a pedestal, which is arranged on the substrate 20 and is optionally connected to at least one metal strut 2.
• For aligning the pan receiving elements 7 each serve a positioning means 4 'in the form of another hydraulic cylinder.
• the positioning means 4 ' are connected via a rotary joint with the crossbars 5.
• the crossbeams 5 continue to have the treatment device receiving elements 21 on their upper sides.
• the treatment device receiving elements 21 are moved horizontally in the direction of the treatment device 3 by further positioning elements 4 ".
• the further positioning elements 4 "for aligning tion of the treatment device receiving elements 21 are largely hidden in this illustration by the cross bar 5 and by the treatment device receiving elements 21 and only the underside of a further positioning element 4 '' is visible on the left side.
• the further positioning elements 4 '' for aligning the treatment device receiving elements 21 are fixed at one end to the transverse bar 5. The other end of the further positioning element 4 "is connected to the respective treatment device receiving element 21.
• the crossbar 5 moves upward.
• the pan 9 is raised together with the liquid metal 8 in the pan 9.
• a treatment of the liquid metal 8 by means of the treatment device 3, in particular a degassing is possible.
• the transverse bars 5 and thus the pan 9 are lowered again by means of the positioning elements 4 and the pan 9 is lowered onto the pan
• FIG. 1 shows the device 1 for lifting a pan 9 from FIG. 1.
• the device 1 comprises two mirror-image parts which together form the device 1.
• the same reference numerals as in FIG. 1 designate the same elements.
• JE of the parts comprises a transverse bar 5, two positioning elements 4 for vertical positioning of the respective crossbar 5, a positioning means 4 'for aligning the pan receiving element 7, a treatment device receiving element 21 and a further positioning element 4''for actuating the treatment device receiving element 21st
• the crossbar 5 in this embodiment consists of several composite metal parts. This embodiment is advantageous because of its stability and low weight. An advantage of this design is also the modular structure of standard components such as tailored mold components.
• 3 shows a schematic representation of another system 100 'in the side view.
• the same reference numerals as in FIGS. 1 and 2 designate the same elements.
• the treatment device 3 is fastened with fastening elements 15 to the metal struts 2.
• the crossbars 5 (of which only one is visible here) have no treatment device receiving elements 21.
• For vertical positioning of the crossbar 5 serve two positioning elements 4 in the form of hydraulic cylinders. These are fastened to the underside on angular support elements 16 on the metal struts 2.
• To reduce the friction between crossbar 5 and metal struts 2 in the vertical positioning of the crossbar 5 in the z-direction guide elements 12 serve in the form of roller bearings.
• the pan 9 has four handle elements 11 here.
• FIGS. 1 and 3 designate the same elements.
• the positioning elements 4 are here attached to the insides of the metal struts 2. To the functioning of the others
• each of the two transverse bars 5 has both a cup receiving element 7 and a treatment device receiving element 21.
• the orientation of the cup receiving element 7 is by a positioning means (not visible here) and the orientation of the treatment device receiving element 21 is by other positioning elements 4 '' changeable.
• positioning elements 4 for vertical positioning of the crossbar 5 here is an electric drive.
• Racks 4b are fastened along the metal struts 2.
• the motors 4a For positioning the crossbar 5 serve motors 4a, which are fixed to the crossbar 5.
• the motors 4a drive gears, which are toothed with a rack 4b.
• the racks 4b are also retrofittable to existing metal struts 2 mountable.
• the treatment device 3 is fastened by means of fastening elements 15 to at least one transverse strut 2 a, which is releasably fastened between two metal struts 2 of the four metal struts 2.
• the fastening elements 15 are released and the treatment device 3 is supported by the treatment device receiving elements 21.
• hydraulic cylinders can optionally be supplemented, as shown, for example, in FIG. The hydraulic cylinders advantageously assist the positioning of the crossbars 5.
• the support of the positioning of the crossbeams 5 by a simultaneous use of positioning elements 4 and hydraulic cylinders contributes to increasing the safety of such a device 1.
• the treatment device receiving elements 21 are movably mounted on the crossbar 5.
• the treatment device receiving elements 21 for receiving the treatment device 3 are changeable in their orientation by means of the further positioning elements 4 '.
• the pan 9 is raised by means of two pan-receiving elements 7.
• the trolley 17 is freely movable in this position of the pan 9.
• the trolley runs on rails 18, which are part of a transport system.
• FIG. 6 shows the system 100 "according to FIG. 5 in the state before the treatment device 3 is replaced.
• the same reference numerals as in FIG. 5 designate the same elements.
• the crossbeams 5 are raised so far that the treatment device 3 can be received by means of the extended treatment device receiving elements 21.
• the treatment device 3 is released from the at least one transverse strut 2a, wherein the fastening means 15 are released.
• the treatment device 3 can now be raised. After lifting the treatment device 3, this is held only on the treatment device receiving elements 21 and the crossbars 5. Any connections with vacuum pumps for generating a negative pressure in the interior of the treatment device 3 are separated. Such compounds have not been shown here for the sake of clarity.
• the treatment device 3 Due to the vertical change in the position of the transverse bars 5, the treatment device 3 can be changed in its vertical position and set down on the provided empty trolley 17.
• the treatment device receiving elements 21 are brought into a position so that they can be retracted again. After the maintenance work or an exchange of the treatment device 3, it is possible to lift the treatment device 3 again by means of the treatment device receiving elements 21 and then fix it again to the metal struts 2 or here the at least one transverse strut 2 a by means of the fastening means 15 provided for this purpose.
• a combination of the positioning belts shown in the figure is shown.
• te 4 with hydraulic cylinder for positioning the crossbar 5 use.
• FIG. 7 shows the system 100 "according to FIG. 5 with the treatment device 3 in a lowered vertical position.
• the same reference numerals as in FIG. 5 or 6 denote the same elements.
• the figure shows the device 1 shortly before a settling of the treatment device 3 on the rolling carriage 17 provided therefor.
• the fastening elements 15 on the at least one transverse strut 2 a are freely accessible. In this
• Position are the pan receiving elements 7 in a highly angular orientation.
• FIG. 8 shows a further possibility of positioning the crossbar 5 on a metal brace 2 for a device for the treatment of liquid metal.
• a positioning element 4 in the form of a suspended hydraulic cylinder is fastened to the metal strut 2 by means of a receiving element 16.
• the movable end of the hydraulic cylinder is fixed by means of a hinge 19 to the crossbar 5.
• the crossbar 5 slides over a guide element 12, in this case by means of rollers or balls, along the metal strut 2 along.
• several such hydraulic cylinders per metal strut 2 are expedient.
• both the metal struts 2, the cross bars 5 and the optional cross struts 2a are advantageously made of a suitable section steel, in particular a double-T profile.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transportation (AREA)
• Load-Engaging Elements For Cranes (AREA)
• Treatment Of Steel In Its Molten State (AREA)
• Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
• Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
• Manufacture And Refinement Of Metals (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (3)

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• 2013
  • 2013-07-12 DE DE102013213716.8A patent/DE102013213716B4/de not_active Expired - Fee Related
• 2014
  • 2014-06-23 BR BR112016000311-0A patent/BR112016000311B1/pt not_active IP Right Cessation
  • 2014-06-23 MX MX2016000348A patent/MX2016000348A/es active IP Right Grant
  • 2014-06-23 CN CN201480039845.XA patent/CN105473491B/zh active Active
  • 2014-06-23 WO PCT/EP2014/063107 patent/WO2015003890A1/de active Application Filing
  • 2014-06-23 RU RU2016104607A patent/RU2683158C2/ru active

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