EP2603757A1 - Procédé de fonctionnement d'un dispositif de préchauffage de charge, dispositif de préchauffage de charge et installation four de fusion - Google Patents

Procédé de fonctionnement d'un dispositif de préchauffage de charge, dispositif de préchauffage de charge et installation four de fusion

Info

Publication number
EP2603757A1
EP2603757A1 EP11740625.6A EP11740625A EP2603757A1 EP 2603757 A1 EP2603757 A1 EP 2603757A1 EP 11740625 A EP11740625 A EP 11740625A EP 2603757 A1 EP2603757 A1 EP 2603757A1
Authority
EP
European Patent Office
Prior art keywords
shaft
opening
charging
charging material
exhaust gas
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.)
Withdrawn
Application number
EP11740625.6A
Other languages
German (de)
English (en)
Inventor
Uwe Wilhelm
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.)
Primetals Technologies Germany GmbH
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP2603757A1 publication Critical patent/EP2603757A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • 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
    • 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
    • C21C5/56—Manufacture of steel by other methods
    • C21C5/562—Manufacture of steel by other methods starting from scrap
    • C21C5/565—Preheating of scrap
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/18—Arrangements of devices for charging
    • F27B3/183—Charging of arc furnaces vertically through the roof, e.g. in three points
    • F27B3/186—Charging in a vertical chamber adjacent to the melting chamber
    • 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
    • C21C2005/5282—Charging of the electric furnace with organic contaminated scrap
    • 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 method for operating a Chargiergutvor lockerrs for a melting furnace and a Chargiergutvor lockerr, wherein the Chargiergutvor lockerr a
  • the invention furthermore relates to a melting furnace system comprising such a charging material preheater.
  • the invention relates to a charging material preheater for lumped charging material in the form of metal scrap, which is melted down in a melting furnace, in particular an electric arc furnace.
  • Chargiergutvor lockerr and melting furnace systems of the type mentioned are known for example from DD 292517 A5.
  • the DD 292517 A5 describes a smelting unit with a slot-shaped Chargiergutvor Anlagenr and a melting furnace in the form of an electric arc furnace.
  • the shaft of the Chargiergutvor ⁇ preheater forms a kon ⁇ constructive unit with a cover of the Lichbogenofens.
  • at least one movable locking member or a retaining device is present in the shaft.
  • DE 3940558 AI describes an electric arc furnace with a slot-shaped Chargiergutvor Anlagenr, which together with the Cover the furnace is moved relative to the furnace furnace furnace furnace furnace vertically or horizontally.
  • a charging material preheater are generally used to use the heat energy contained in the exhaust gas of a melting furnace in large as possible ⁇ SSER quantity to preheat a charge in the melting furnace to be melted lumpy charging material and thus to reduce the specific energy requirement of the melting furnace and to optimize the energy balance of the melting process.
  • the resulting during the melting of a batch of charging material in the furnace exhaust gas is usually sucked to and passed through a subsequently introduced into the furnace batch of lumpy charging material through.
  • the charging material is temporarily stored in a container or shaft laterally and / or above the melting furnace and acted upon by the extracted from the furnace chamber exhaust gas.
  • the shaft functions here like a chimney, at the upper end, ie in the region of the charging opening, due to the thermal and a downstream vacuum generator, a negative pressure is generated, which causes suction of the exhaust gases from the furnace chamber.
  • the shaft can be arranged directly above the Ofende ⁇ ckels so that the charging material can fall down directly into the furnace space.
  • the shaft may also be arranged laterally of the furnace, wherein the charging material falls within a, for example, horizontal supply channel, from which it is displaced by means of for example a shift ⁇ bers in the furnace chamber.
  • One or more movable and / or pivotable retaining ⁇ devices are generally used to retain in a first position, the charging material for the purpose of preheating in the shaft and drop down into a further position the heated charging material by its own weight out of the chute or slide down to leave.
  • a retainer may be in the form of a grid or the like that can be laterally pulled out of the well to release the discharge opening.
  • a retaining device can also pivotal fingers or extensions have, which release the discharge opening by pivoting the fingers or projections down.
  • the charging material lies on the retention device (s) and exhaust gas flows through it.
  • the exhaust gas in rich Be ⁇ the discharge opening of the hopper is introduced into the shaft opening and removed in the area of the charging opening of the hopper and fed to a generally exhaust gas aftertreatment system.
  • the exhaust gas is often introduced through the discharge opening in the shaft, the retainer (s) must be permeable in this case, of course, for the exhaust gas or the exhaust gas must pass.
  • Charging material is in the worst case so strong that it comes to ei ⁇ nem closure of the shaft through the charging material and the shaft no longer fulfills the function of a chimney. In Result it comes to an outgassing of the furnace, ie it forms in the furnace from an overpressure and the exhaust is blown Undefined by scratches and leaks between the furnace lid and furnace vessel, shaft and furnace cover, etc. in the atmosphere.
  • the charging material preheater comprises a shaft with a vertical shaft opening, which at its upper end has at least one charging opening for filling the shaft opening with lumpy
  • Charging material and at its lower end has a Entle fürsöff ⁇ tion, wherein a cross section of the shaft opening extends from the charging opening in the direction of the discharge opening, and wherein the Chargiergutvor lockerr in the region of the discharge opening further at least one
  • Retaining device for temporary retention of the charge in the shaft comprises, comprising the following steps: a) arranging the shaft in a charging position above and / or laterally of the furnace;
  • the object is for the Chargiergutvor lockerr, in particular for carrying out the method according to the invention, wherein the Chargiergutvorowskir a shaft with a vertical
  • Shaft opening comprises at least one charging opening for filling the shaft opening with lumpy charging material and at its lower end has at its upper end a Entlee ⁇ convergence opening, wherein a cross section of the Schachtöff ⁇ voltage, starting extended from the charging opening in the direction of the discharge opening, and wherein the Chargiergutvor lockerr in the discharge opening further comprises at least one retaining means for temporary retention of the charge in the manhole, thereby solved that further ⁇ at least one lifting device for vertical lifting of the shaft relative to by means of at least one rear ⁇ holding device in the shaft restrained batching material is present.
  • the at least one lifting device of the charging material preheater according to the invention in particular for the vertical lifting of the shaft relative to the charging material from a Chargierposi ⁇ tion, in which at least one horizontal cross-sectional area of the shaft opening is filled with charging material, ⁇ rmposition furnished in a pre ⁇ in which at least one, par- dere annular, auxiliary opening between an inner wall of the shaft and the retained charge is also keptbil ⁇ det.
  • the shaft is first filled with lumped charging material, wherein a me ⁇ chanisch largely stable cone forms on charging material in the shaft opening, wherein the charging material is partially in direct contact with the inner wall of the shaft.
  • the at least one auxiliary opening forms when required a Pas ⁇ say for the exhaust gas, which is at least largely or completely free of charging material, so that at least a part of the ex ⁇ gases from the furnace during the entire preheating time in which the charging material remains in the shaft, the Schachtöff ⁇ voltage crossing and can be utilized for preheating the charging material.
  • the freely flow-through cross section in the shaft which was previously determined solely by the spaces between the existing pieces of charging material is at least temporarily artificially increased by the formation of at least one auxiliary opening if necessary, so that each ⁇ currently exhaust can pass through the shaft.
  • the chimney effect of the shaft is maintained and a Ausqual ⁇ men of the melting furnace is reliably avoided.
  • the exhaust gas is sucked through the at least one auxiliary opening and the spaces between ⁇ rule the pieces of charging material.
  • the exhaust gas is increasingly sucked through the at least one auxiliary opening and can pass further up in the shaft in the interstices in the cone and further heat the charge in the interior of the cone , This ensures good heat transfer from the exhaust gas to the charging material.
  • the at least one retaining device is in particular designed to be pivotable about a pivot axis, which is arranged horizontally parallel to the shaft wall in the region of the shaft wall.
  • a pivot axis which is arranged horizontally parallel to the shaft wall in the region of the shaft wall.
  • two pivotable restraints are provided opposite each other on the shaft.
  • the te shark can also be designed as a grate or grate movable in another way, for example as a grate which can be displaced horizontally.
  • the cross section of the shaft opening expands starting from the charging opening in the direction of the emptying opening preferably uniformly on all sides, so that when lifting the shaft relative to the charging an annular opening between the inner wall of the shaft and the charging material is formed substantially uniformly wide everywhere. This improves the uniformity of the heating of Char ⁇ gierguts.
  • Step d) of the process preferably takes place already during a performance of step c) or steps c) and b) or steps c) and b) and a).
  • the exhaust gas is continuously sucked out of the furnace chamber into the shaft without interruption. This also makes it possible to use the time in which the shaft is filled and the flow-through cross section in the shaft is purposefully increased.
  • the Vorciar ⁇ tion of a batch of charging material is effected by much more quickly, without having to be expected that at the beginning of preheating already ei ⁇ nem bonding the charging material.
  • a gas-tight connection, indirectly or directly, between the shaft and the furnace is preferably maintained, in order to avoid exhaust gas leakage into the atmosphere and heat loss. It has proven useful if the at least one remindhalteein ⁇ direction, the emptying opening during the preheating of the charge in the shaft only partially closes and the exhaust gas is passed through the discharge opening in the shaft opening. Thus, an additional connection of the shaft and furnace space for transferring the exhaust gas into the shaft can be saved.
  • the at least one retaining means of the invention shown SEN charging material preheater preferably comprises at least two retaining fingers which are spaced from each other that only partially closes at least one remindhalteeinrich ⁇ tung while retaining charging material in the shaft, the emptying opening. This allows the exhaust gas without detour directly into the discharge opening and thus reach the shaft opening.
  • the fingers can be arranged to each other such that the fingers of one remindhal ⁇ te immunity show to the fingers or in the gaps between the fingers of the other retainer.
  • the shaft is brought relative to the charging material by means of at least one lifting device from the Chargierpo ⁇ position in the preheating or vice versa.
  • the at least one lifting device can be actuated either manually or automatically.
  • the at least one lifting device of the charging material preheater according to the invention is preferably connected to the shaft and / or the at least one retaining device.
  • the at least one lifting device engages at the shaft and the shaft in the vertical direction be ⁇ is moved.
  • the shaft is lifted vertically upward.
  • the at least one lifting device can be formed for example by a crane or at least one lifting cylinder, which acts directly on the shaft or on a mechanically fixedly connected to the shaft support structure.
  • the at least one lifting device can engage a retaining means to the at least such that the at least one retaining means including the charging material to the retained ⁇ it is moved in the vertical direction downwards.
  • the shaft itself remains unchanged in its position and is only raised relative to the load.
  • At least one exhaust gas value is detected in the shaft opening, which in particular characterizes an exhaust gas quantity and / or an exhaust gas pressure and / or an exhaust gas volume and / or an exhaust gas velocity and / or an exhaust gas temperature of the exhaust gas flowing through the shaft opening, and wherein a middle one Width of the at least one auxiliary opening ⁇ tion, which corresponds to the average distance between the inner wall of the shaft and the charging material, is set in dependence on the at least one exhaust gas value.
  • the vertical raising of the shaft is preferably carried out relative to the charging material, until in the area of Entle fürsöff ⁇ a negative voltage exhaust gas pressure, in particular ranging from about - LoPa present. This ensures that at all times has a sufficient size by ⁇ flowable cross-section in the shaft and a Ausqualmen of the melting furnace is prevented.
  • either the shaft or the at least one retaining device can be moved as a function of the at least one exhaust gas value.
  • the charging material preheater has at least one measuring device on the shaft for detecting at least one exhaust gas value, in particular an exhaust gas quantity and / or an exhaust gas pressure and / or an exhaust gas volume and / or an exhaust gas velocity and / or an exhaust gas temperature of the exhaust gas flowing through the shaft opening, wherein the at least a lifting device and / or the at least one retaining device can be controlled by at least one control device as a function of the at least one exhaust gas value.
  • the control device receives the signals from the at least one measuring device and changes the size of the at least one auxiliary opening and / or the position of the at least one retaining device on this basis.
  • the at least one control device is considered as a white component of the charging material preheater.
  • a first measuring device in the region of the discharge opening and a further measuring device in the region of the charging opening is preferably provided to determine the op ⁇ timal shaft position relative to the charging material and optionally by changing the shaft position relative to the charging material based on the exhaust pressures measured there to set a desired exhaust gas pressure difference in the shaft.
  • the object is further achieved for the melting furnace system in that it comprises a melting furnace and a arranged above and / or laterally of the melting furnace erfindungsge MAESSEN Chargiergutvor Suiter.
  • the melting furnace is preferably one
  • the melting furnace for melting lumped charging material in the form of metal scrap, in particular steel scrap. More preferably, the melting furnace is an electric arc furnace, comprising in particular a furnace vessel, a furnace cover, Minim ⁇ tes a guided through the furnace cover electrode and Minim ⁇ least a guided through a furnace wall of the furnace vessel, fossil fueled burner unit. Alternatively it can also be a different type of furnace and / or to other relieschmelzendes charging material, such as glass shards ⁇ .
  • At least one flexible sealing arrangement is furthermore provided, which forms a gas-tight connection directly or indirectly between the shaft and the melting furnace in the charging position, the preheating position and any further position between the charging position and the preheating position of the shaft relative to the retained charging material ,
  • the flexible sealing arrangement is formed as a tubular bellows-type bellows gas-tight, in particular on the one hand connected to the furnace lid of the furnace and on the other hand the circumference of the shaft.
  • the flexible seal arrangement is preferred as the tubular Bellows seal formed, which is in particular connected on the one hand gas-tight with the supply shaft and on the other hand, the circumference of the shaft of the Chargiergutvor Suiters.
  • the flexible seal arrangement reliably prevents leakage of exhaust gas into the atmosphere and heat loss.
  • Figures 1 to 12 show examples of various OF INVENTION ⁇ dung proper charging material and method for its operation, and shows schematically a so equipped ⁇ melting furnace. So shows 1 shows a Chargiergutvor Suiter in charging position;
  • FIG. 2 shows the charge material preheater according to FIG. 1 in preheating position
  • FIG. 3 shows the charge material preheater according to FIG. 1 in a first possible plan view
  • FIG. 4 shows the charging material preheater according to FIG. 1 in a second possible plan view
  • FIG 5 Charge material preheater according to FIG 1 in one
  • FIG. 7 shows schematically the melting furnace system according to FIG. 6 with the charge material preheater according to FIG. 2 in FIG
  • FIGS. 8 to 12 show a method for operating a charging material preheater on the basis of the melting furnace system according to FIGS. 6 and 7.
  • Shaft 2 with a vertical shaft opening 2a comprises.
  • the shaft 2 has at its upper end a charging opening 3 for filling the shaft opening 2a with lumpy charging material 50 (charging material and its location in the shaft only for the sake ⁇ sake half shown schematically) and at its lower end an emptying opening 4 for transferring the charge 50 from the shaft opening 2a in a melting furnace (see FIG 6 or 7) or alternatively in a supply shaft, from which it is moved in the direction of a melting furnace on.
  • Em cross section of the shaft opening 2a widens out ⁇ starting from the charging opening 3 in the direction of the discharge opening 4.
  • the charging stock preheater 1 comprises here in the region of the emptying opening 4 further comprises two about a pivot axis 5a pivotable retaining devices 5 for the temporary retention of the charging material 50 in the shaft 2.
  • the Schwenkbe ⁇ rich the retaining devices 5 to the respective pivoting Axle 5a is indicated here by double arrows and dashed lines.
  • At least one lifting device 6, which is shown only schematically, is provided for vertically lifting the shaft 2 relative to the charging material 50 retained in the shaft 2.
  • the lifting and lowering function of the lifting device (s) 6 is indicated here by a double arrow.
  • a He ⁇ stunning device 6, which is able to raise the shaft vertically may be, or a combination of lifting lugs on the shaft 2 with a crane to acting on the shaft or a mechanically strong composites ⁇ NEN with the shaft support structure, for example, Act lift cylinder.
  • the lifting device can also or additionally act on the retaining devices or their pivot axes, or an electric drive for moving these components, and the position of the retaining devices 5 including the charging material 50 relative to the shaft 2 to changed ⁇ countries.
  • the lifting device (s) 6 is / are designed for vertical lifting of the shaft 2 relative to the charging stock 50 of an embodiment shown in FIG 1 charging position, in which at least one horizontal cross-sectional area of the shaft opening is filled 2a with charging material 50, in a preheating position according to FIG 2 is a ⁇ directed.
  • the shaft 2 In the preheating position shown in FIG. 2, the shaft 2 is lifted vertically relative to the charging material 50 from the charging position according to FIG. 1, whereby at least one gap or annular auxiliary opening 7 is formed between an inner wall of the shaft 2 and the charging material 50 remaining in its conical shape becomes.
  • At least one measuring device 9 for Erfas ⁇ solution of at least one exhaust gas value in particular an exhaust quantity and / or an exhaust gas pressure and / or an exhaust gas volume and / or an exhaust gas velocity and / or an exhaust gas temperature of the shaft opening 2a flowing through the exhaust gas present.
  • the lifting device (s) 6 and / or the retaining devices 5 are controllable here by means of at least one control device 10 as a function of the at least ei ⁇ nen exhaust gas value.
  • the control device 10 upon detection of an exhaust gas pressure, exhaust gas volume or Ab ⁇ gas velocity, which / which (s) (s) below a fest ⁇ th limit, effect a further increase of the shaft 2 by means of the lifting device (s) 6, the at least to enlarge a gap or annular auxiliary opening 7 and to increase the cross-section for exhaust gas from a melting furnace.
  • an elevation of the shaft 2 by means of the lifting device (s) 6 can be effected in order to enlarge the at least one auxiliary opening 7 and enlarge the cross-section for exhaust gas from a melting furnace, thus more exhaust gas is forced through the shaft 2 and the charging material 50 and this is optimally heated.
  • the position of the shaft 2 relative to the cone of charging material 50 can therefore be adapted automatically and dynamically to the exhaust gas values.
  • an actuation of the retaining devices 5 by the control device 10 can take place upon detection of a specific exhaust gas temperature.
  • Exceeds the exhaust gas temperature for example, a certain limit at which is safe to expect a melting of the charge 50 in the shaft, a pivoting process can be automatically initiated so that the batch 50 fall in the direction of gravity from the shaft 2 via the discharge opening 4 down or slip can and a strong sticking with the retaining means 5 is prevented.
  • FIGS. 3 to 5 show the charging material preheater 1 according to FIG. 1 in each case in a possible plan view. Same strainszei ⁇ surfaces as shown in Figs 1 and 2 indicate like elements.
  • the circumference of the shaft 2 of the charging material preheater 1 is rectangular, for example.
  • the Char ⁇ yaw opening 3 and the discharge opening not visible here 4 are here square formed with all four sides of the shaft 2 are made uniformly obliquely to the vertical.
  • an annular auxiliary opening 7 is formed.
  • the circumference of the shaft 2 is also formed rectangular. However, only two of the four sides of the shaft 2 are formed obliquely, while the other two sides are aligned vertically.
  • two slit-shaped, rectangular auxiliary openings 7 form in the region of the oblique side walls of the shaft 2.
  • the circumference of the shaft 2 of the charging material preheater 1 is, for example, round.
  • the Chargieröff ⁇ tion 3 and the not visible here emptying opening 4 are formed here circular, with the diameter of the shaft 2, starting from the charging opening 3 evenly expanded in the direction of discharge opening 4.
  • an annular auxiliary opening 7 is also formed here.
  • the centers of the charging opening 3 and the discharge opening 4 are on the longitudinal axis of the
  • the periphery of the charging opening 3 and the discharge opening 4 can, shown by way ⁇ represents, for example, in FIG 4 differ from each other.
  • FIG. 6 schematically shows a melting furnace system 100 comprising a melting furnace 110 and a charge material preheater 1 arranged above the melting furnace 110 according to FIG. 1 in the charging position.
  • 7 shows schematically the melting furnace system 100 according to FIG. 6 with the charging material preheater 1 according to FIG. 2 in the preheating position.
  • Same reference numerals as in FIGS. 1 and 2 identify the same elements.
  • At least one flexible seal assembly 8 is present, which in the charging position, the preheating position and any other position between the Charging and the preheating position of the shaft 2 relative to the retained charge 50 forms a gas-tight connection between the shaft 2 and here the melting furnace 110.
  • a sealing arrangement 8 a tubular bellows made of a highly temperature-resistant material tempe ⁇ which is gas-tight for the exhaust gas from the melting furnace 110th
  • FIGS. 8 to 12 now schematically show a method for
  • the Char ⁇ giergutvor lockerr 1 is here above an opening llOd arranged in the furnace lid 110c of the melting furnace 110, which covers the melting ⁇ vessel 110b of the melting furnace 110 above.
  • the emptying ⁇ opening 4 is located in this embodiment, just above the opening llOd in the furnace lid 110c, so that the retaining ⁇ devices 50 are pivotable in the furnace chamber 110a.
  • Shaft 2 is formed by the tubular, flexible seal ⁇ arrangement 8.
  • an exhaust gas extraction 12 is provided for exhausting exhaust gas 12a from the furnace chamber 110a.
  • the exhaust gas 12a from the furnace chamber 110a is sucked into the shaft 2 through the discharge port 4, rises in the shaft port 2a and is sucked off via the charging port 3 or in the region of the charging port 3.
  • the exhaust gas 12 a heats the next intended for melting, stored by means of the retaining means 5 batch of bulk cargo 50 a.
  • the charging material 50a is filled into the shaft 2 until at least one horizontal cross-sectional area of the shaft opening 2a is filled with the charging material 50a. It forms a mechanically me ⁇ largely stable, self-supporting cone on charging material 50a.
  • the furnace vessel 110b is often tilted, as shown in FIG. But also a in the bottom region of the furnace vessel 110b existing An outlet can be used, with the furnace vessel 110b not having to be tilted.
  • the next melt down cycle begins by the preheated charging material 50a isssenschmol ⁇ zen in the furnace chamber 110a and a new batch of lumpy charging material 50b, shown only schematically here in the form of an arrow, is filled into the shaft. 2
  • a new batch of lumpy charging material 50b shown only schematically here in the form of an arrow, is filled into the shaft. 2
  • an exhaust gas extraction 12 which can be opened via at least one slide and / or at least one flap in such a way that the new charge material 50b can be charged through the exhaust gas extraction 12 into the shaft opening 2a.
  • Chargiergutvor Suiters opposite the furnace is chosen only by way of example. Furthermore, it is not detailed Darge ⁇ represents that there may be an arc furnace for the smelting furnace, wherein the electrodes are guided through the furnace lid, fossil-fueled burner units are passed through the wall of the furnace vessel. Also, the Hebeein ⁇ direction (s) is / are only shown schematically, which are capable of the shaft relative to the charging material in the Lift shaft vertically. So can be done in addition to a crane or overhead crane and the use of one or more lifting cylinders. As both the lift cylinder for example, the furnace roof, the furnace platform, the foundation, etc. can be mon ⁇ advantage and attack at bay and lift it or lower it. Also, lifting device (s) thus mounted can be arranged to vertically lower or raise the position of the restraint devices and thus the charge material disposed thereon, without departing from the spirit of the invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

L'invention concerne un procédé de fonctionnement d'un dispositif de préchauffage de charge pour un four de fusion, un dispositif de préchauffage de charge et une installation four de fusion équipée d'un tel dispositif de préchauffage de charge. Le dispositif de préchauffage de charge comprend un puits pourvu d'une ouverture verticale qui présente, à son extrémité supérieure, au moins un orifice de chargement pour remplir l'ouverture de puits d'une charge en morceaux et, à son extrémité inférieure, un orifice d'évacuation; une section transversale de l'ouverture de puits s'élargissant de l'orifice de chargement en direction de l'orifice d'évacuation; et le dispositif de préchauffage de charge au voisinage de l'orifice d'évacuation comportant également au moins un équipement de retenue pour la retenue temporaire de la charge dans le puits. Le dispositif de préchauffage de charge permet un soulèvement vertical du puits par rapport à la charge retenue dans le puits depuis une position de chargement jusqu'à une position de préchauffage, au moins un orifice auxiliaire étant formé entre au moins une zone d'une paroi interne du puits et la charge retenue dans le puits.
EP11740625.6A 2010-08-10 2011-07-27 Procédé de fonctionnement d'un dispositif de préchauffage de charge, dispositif de préchauffage de charge et installation four de fusion Withdrawn EP2603757A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010039112 2010-08-10
PCT/EP2011/062914 WO2012019913A1 (fr) 2010-08-10 2011-07-27 Procédé de fonctionnement d'un dispositif de préchauffage de charge, dispositif de préchauffage de charge et installation four de fusion

Publications (1)

Publication Number Publication Date
EP2603757A1 true EP2603757A1 (fr) 2013-06-19

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DE102014115671A1 (de) * 2014-10-28 2016-05-12 Gerhard Fuchs Schmelzvorrichtung und schmelzverfahren

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DE3906653A1 (de) 1989-03-02 1990-09-06 Fuchs Technology Ag Einschmelzaggregat mit schachtfoermigem chargiergutvorwaermer
DE3940558A1 (de) 1989-12-07 1991-06-13 Fuchs Technology Ag Verfahren zum betrieb eines lichtbogenofens und lichtbogenofen
WO1994009332A1 (fr) * 1992-10-16 1994-04-28 Nippon Steel Corporation Convoyeur de riblons d'acier
DE19807590A1 (de) * 1998-02-23 1999-08-26 Arcmet Tech Gmbh Chargiergutvorwärmer
DE10140805A1 (de) * 2001-08-20 2003-03-06 Vai Fuchs Gmbh Metallurgischer Ofen und Materialkorb für einen metallurgischen Ofen
RU2293938C1 (ru) * 2005-09-29 2007-02-20 Общество с ограниченной ответственностью "СЛОТ" Подогреватель скрапа электродуговой сталеплавильной печи средней и малой мощности посредством дымовых газов

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RU2576973C2 (ru) 2016-03-10
RU2013110305A (ru) 2014-09-20
MX2013001556A (es) 2013-03-07

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