EP0329566B1 - Convertisseur d'élaboration de métal - Google Patents

Convertisseur d'élaboration de métal Download PDF

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Publication number
EP0329566B1
EP0329566B1 EP89400459A EP89400459A EP0329566B1 EP 0329566 B1 EP0329566 B1 EP 0329566B1 EP 89400459 A EP89400459 A EP 89400459A EP 89400459 A EP89400459 A EP 89400459A EP 0329566 B1 EP0329566 B1 EP 0329566B1
Authority
EP
European Patent Office
Prior art keywords
rollers
tank
tilting
converter according
support
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.)
Expired - Lifetime
Application number
EP89400459A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0329566A1 (fr
Inventor
Robert Vatant
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.)
Clecim SAS
Original Assignee
Clecim SAS
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 Clecim SAS filed Critical Clecim SAS
Priority to AT89400459T priority Critical patent/ATE71983T1/de
Publication of EP0329566A1 publication Critical patent/EP0329566A1/fr
Application granted granted Critical
Publication of EP0329566B1 publication Critical patent/EP0329566B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/50—Tilting mechanisms for converters
    • 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
    • C21C5/4633—Supporting means

Definitions

  • the subject of the invention is a new embodiment of a metal processing converter.
  • the converters used in particular for the preparation and refining of steel by blowing air or oxygen into a cast iron bath, generally consist of a retort in the form of an elongated tank in which is charged a bath of liquid metal to be treated, for example cast iron.
  • the tank consists of a side wall, generally of revolution about an axis and limiting a treatment space closed at one end by a bottom and opening at its other end on a loading and pouring orifice, the side wall and the bottom being covered with a refractory lining.
  • the retort must be placed in an upright position for blowing air or oxygen and then inverted by rotation around a horizontal axis for the casting of the metal after treatment.
  • the tank is placed between two raised fixed supports on which it rests by means of two diametrically opposite rotary support members centered on the same horizontal axis around which the tank can tilt under the action of a control means.
  • the support members are subjected, on the one hand, to mechanical loads which depend on the self-weight of the tank and the refractories, on the load of cast iron and / or scrap and on the vibrations caused by the treatment. and, on the other hand, the thermal loads due to the temperature of the pig iron loaded in the tank, to the temperature given off by the blowing of air or oxygen during the preparation and to the radiation during the cleaning or emptying .
  • the treatment tank covered internally with a refractory coating so as to withstand the high temperatures due to the treatment and on the other hand its support means which generally comprise a circular belt delimiting an orifice in which the tank can be threaded, bearing on the two fixed supports, by means of pins.
  • the tilting movement is applied to the belt which rotates around its pins by driving the tank.
  • the tilting torque can advantageously be applied to a crown of fairly large diameter wedged on one of the pins and whose rotation is controlled by a reduction gear (FR-A-1,550,338).
  • a crown in the form of a cylindrical ferrule centered on the tilting axis, can also be rotatably mounted on rollers so as to serve as a support member for the belt (FR-A-1257664).
  • the treatment function and the support and tilting function are thus ensured by separate members which can be provided accordingly, for example, the belt can be cooled by circulation of water, which is not possible in tank.
  • the tank is not generally supported by the belt only by isolated support points.
  • Such an embodiment is, however, very heavy and expensive since the belt must support not only the weight of the tank but also the moments due to tilting.
  • the self-weight of the belt can, moreover, be of the same order as that of the tank.
  • the subject of the invention is a new embodiment of the converter making it possible to satisfactorily resolve all of these difficulties thanks to a much simpler support mode.
  • the invention therefore applies, in general, to a converter of the type comprising an elongated tank placed between two raised fixed supports and constituted by a hollow side wall centered on an axis and limiting a closed treatment space to a end by a bottom, the assembly being internally covered with a refractory lining, two diametrically opposite rotary support members, taking support, respectively, on the two fixed supports and centered on the same transverse axis of tilting orthogonal to the axis of the tank, and means for controlling the tilting of the tank around the transverse axis.
  • each rotary support member of the tank comprises a piece in the shape of a large-diameter circular ferrule, on which are formed a plurality of regularly distributed notches limiting a plurality of spaced connecting blades whose ends are turned towards the tank are fixed directly to the side wall thereof along an internal connecting edge, said connecting blades being calculated so as to withstand the various forces of bending, compression and shearing, while allowing the deformations of the tank so that the use of a support belt independent of the tank is not necessary.
  • each ferrule may be between a quarter and a half of the diameter of the tank.
  • each rotary support member comprises a circular track formed on the external face of the ferrule and bearing on at least two rotary rollers mounted on the corresponding fixed support and spaced from one another .
  • each support member preferably comprises a series of gussets placed inside the shell and associated respectively with said connecting blades, each gusset having two perpendicular sides fixed respectively on the side wall of the tank and on the internal face of the shell.
  • each support is provided with at least two counter-rollers for holding the ferrule, bearing on the latter on the side opposite to the support rollers.
  • These counter-rollers can be carried by an annular frame surrounding the ferrule by bearing from the outside on the same circular track as the support rollers, at the upper part thereof.
  • the rollers and the circular tracks have rounded shapes, respectively convex and concave, cooperating with each other to compensate for misalignments, any mechanical or thermal distortions and the lateral retention of the track on the rollers. .
  • the invention also has the advantage of simplifying the control of the tilting of the tank by using one of the support rings as a drive ring on which a tilting mechanism acts.
  • a circular flange fixed on its periphery on one of the support ferrules and in the center of which is fixed a control shaft centered on the tilting axis and connected by a reducing mechanism to at least one tilt control motor.
  • each pinion could be mounted in a casing carrying rollers rolling on circular tracks adjacent to the ring gear to maintain the meshing of the pinion with the latter.
  • FIG. 1 there is shown, in elevation, the assembly of a converter comprising, generally, a retort 1 placed between two supports 2 and 2 ′ and resting on the latter by means of two members rotary support 30 and 30 diam diametrically opposite and centered on a horizontal axis (15) around which the tank can rotate, under the action of a mechanism 4 for tilting control, so as to be first directed towards the high for the loading of the liquid metal and, if necessary, of the scrap, as well as for the processing of processing, then inclined downwards for the casting of the metal.
  • a mechanism 4 for tilting control so as to be first directed towards the high for the loading of the liquid metal and, if necessary, of the scrap, as well as for the processing of processing, then inclined downwards for the casting of the metal.
  • the tank 1 is constituted by a side wall 11 of revolution about an axis 10 orthogonal to the tilting axis 15, closed at one end by a bottom 12 and opening at its other end on an orifice 13.
  • the wall lateral 11 has, generally, a cylindrical shape in its central part and tightens at its open end so as to limit the orifice 13.
  • the whole of the lateral wall 11 and of the bottom 12 is covered internally by a refractory lining 14.
  • Each support member 30, 30 ′ consists essentially of a cylindrical shell 3, 3 ′, centered on the transverse axis 15 and fixed directly to the side wall 11 of the tank 1.
  • the two support ferrules 3 and 3 ′ form an integral part of the tank 1 whose side wall 11 is entirely free between the two ferrules 3, 3 ′ since no support belt is necessary.
  • Each ferrule 3, 3 ′ is fixed to the side wall 11 of the tank, along its circular edge 31 turned towards the latter and the diameter of the ferrule must therefore be determined so that the connection is provided over a length sufficient for absorb the stresses resulting from the forces applied in service and from differential expansions.
  • Each ferrule will therefore have a much larger diameter than that of conventional pins and which may for example be of the order of half the diameter of the tank.
  • Each support ring 3, 3 ′ rests, along its external face 36, on a pair of support rollers 5 rotatably mounted each around an axis 50 parallel to the transverse axis 15 on a frame 51 fixed itself- even at the top of the support block 2, 2 ′.
  • the two rollers 5 are spaced from each other, on either side of the median plane P1 of the tank passing through the axis 10 of the tank and the tilting axis 15, so as to provide a good seat.
  • the ferrule 3 is mounted on a series of gussets 32 directed along radial planes passing through the axis 15, distributed regularly around this axis and comprising two perpendicular sides fixed respectively on the internal face 33 of the shell 3 and on the side wall 11.
  • the latter is advantageously provided with notches 34 separated from each other and regularly distributed along the shell 3 on the side facing the wall. lateral 11, the ferrule 3 being therefore connected to the wall 11 only by spaced blades 35 left between the notches 34 and by the gussets 32 which are placed in the center of the blades 35.
  • the connecting edge 31 of the ferrule 3 with the side wall of the tank is then formed by the ends of the blades 35 facing the tank.
  • the diameter of the ferrule 3, as well as the dimension and the number of the notches 34 must be determined so that, in total, the connection with the side wall (11) is ensured over a sufficient length.
  • each ferrule 3 therefore constitutes a circular running track on the two support rollers 5, which can advantageously be constituted by a bandage 36 threaded or welded on the ferrule 3.
  • each ferrule 3 on the pair of support rollers 5 are associated with a pair of counter-rollers 52 resting on the ferrule on the opposite side.
  • the rollers 5 are mounted on a frame 51 of annular shape with clearance surrounding the ferrule 3 and at the top of which are mounted the counter-rollers 52, each rotating around d 'an axis parallel to the transverse axis 15 and bearing on the same circular track as the support rollers 5, formed by the tire 36.
  • These rollers are applied with a controlled force so as to avoid vibrations, in particular during the phase of elaboration.
  • the rollers are provided with a convex side wall and the external face 37 of the tire 36 has a corresponding concave shape, which makes it possible to center the rollers 5 and 52 on the track 36 as well as a good distribution. loads over the entire surface of the roller even when the deformations of the tank due to the stresses supported cause a slight misalignment of the ferrules 3, the axis 15 then being slightly curved.
  • the means 4 for controlling the tilting of the tank comprises one or more motors associated with a reduction mechanism 42.
  • the reduction mechanism 42 can, for example, be simply mounted in overhang on a control shaft 44 integral with the flange 43 and centered on the axis 15.
  • the flange 43 is held laterally between two pairs of rollers 53 mounted on the chassis 51 for supporting the rollers 5.
  • the second rotary support member placed on the side opposite to the control mechanism 4, is arranged so as to be able to move slightly by compared to these supports.
  • the support rollers 5 ′ and retaining rollers 52 ′ of the shell 3 ′ can be slidably mounted on their axes so as to move laterally in the event of an increase in the diameter of the tank.
  • the annular frame 51 ′ on which the rollers 5 ′ and the counter-rollers 52 ′ are mounted is articulated around a horizontal axis 21 on a yoke 22 fixed on the upper part of the support frame 2 ′.
  • the possibility of the chassis pivoting is limited by springs which are not shown or else by a torsion bar which distributes the loads on the two rollers.
  • the support ferrules 3 and 3 ′ are molded parts made in one piece with the gussets 32 and the corresponding part 16 of the side wall 11 of the tank which is made up of a portion of cylindrical wall limited by a circular edge of diameter a little larger than that of the shell 3 and which is welded along a circular orifice of the same diameter formed on the side of the wall 11.
  • the molded part 3 is calculated to resist the forces exerted and the circumference of the circular part 16 must be sufficient for the welded connection with the wall 11 to absorb the stresses.
  • FIG. 5 there is shown a mechanically welded embodiment which allows in particular to produce the side wall 11 of the tank in a homogeneous manner.
  • the ferrule 3 is then a simple circular sheet welded to the wall 11 along its internal edge 31.
  • the elongation of the connecting blades 35 increases the flexibility of these and, consequently, the capacity of adaptation of the shape of the shell to the stresses supported.
  • the T-section assemblies formed by each blade 35 associated with a gusset 32, as shown in FIG. 6, are relatively independent of each other and can follow the deformations of the shell 3.
  • the support for the support rings 3 and 3 ′ is produced in a more compact manner.
  • the support rollers 5 are each associated with a counter-roller 54 placed immediately on the other side of the shell 3, that is to say on the internal face 37 thereof.
  • the two pairs of rollers 5 and 54 can then be mounted on a chassis 55 of reduced dimensions which simply covers the lower part of the ferrule 3.
  • the chassis 55 for supporting the rollers placed on the side of the tilting mechanism is fixed and also carries guide rollers 53 mounted to rotate on axes directed radially and bearing on either side a side wall 43 ′ which, in this case, has an annular shape so as to allow the counter-rollers 54 to pass; the flange 43 connected to the drive mechanism 4 is then set back and fixed on the internal face 37 of the ferrule 31.
  • the support rollers 5 ′ and the counter rollers 54 ′ are advantageously mounted to slide axially on the chassis 51 ′ and the latter, as described above with reference to FIG. 2, is itself even mounted pivoting about a horizontal axis 21 ′ on a yoke 22 ′ fixed on the support mass 2 ′.
  • FIG. 9 another particularly advantageous embodiment of the tilting mechanism is shown diagrammatically.
  • a toothed ring 45 is applied directly to one of the support rings 3, or to an extension 40 thereof, to which the tilting control movement is directly applied, by means of one or more several pinions driven in rotation.
  • the two diametrically opposed casings 61 bear on a torsion bar 64 perpendicular to the plane of the figure, fixed on the support block 2 and carrying at its ends two keyed cranks 65, each connected to the corresponding casing 61 by an articulated connecting rod 66 at its ends.
  • the two pinions can be driven by the same motor, for example by means of reducers mounted on each of the casings 61.
  • This arrangement makes it possible, on the one hand, to apply the tilting torque on a large circle, by reducing the shear stresses and, on the other hand, to release the entire interior of the shell, as on the non-motorized side, to pass there the various piping of fluids useful to the process.
  • the invention has many advantages.
  • each ferrule makes it possible to reduce and distribute the support and tilting forces over a larger portion of sheet metal than in conventional systems.
  • the possibility of slight deformation of the support ferrules, and in particular the connection to the retort by relatively flexible blades calculated so as to withstand the various bending, compression and shear forces allows the axial expansion to be left free and diametral of the tank under the effect of thermal stresses.
  • the tank can be supported isostatically since it is supported only by two support members having a certain possibility of adaptation to the distribution of loads.
  • the large diameter of the support ring allows a wide passage for the various fluid pipes necessary for metallurgical processes to be left free.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Electroluminescent Light Sources (AREA)
  • Solid Thermionic Cathode (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Rolling Contact Bearings (AREA)
EP89400459A 1988-02-19 1989-02-17 Convertisseur d'élaboration de métal Expired - Lifetime EP0329566B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89400459T ATE71983T1 (de) 1988-02-19 1989-02-17 Konverter zum erzeugen von metall.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8802037 1988-02-19
FR8802037A FR2627510B1 (fr) 1988-02-19 1988-02-19 Convertisseur d'elaboration de metal

Publications (2)

Publication Number Publication Date
EP0329566A1 EP0329566A1 (fr) 1989-08-23
EP0329566B1 true EP0329566B1 (fr) 1992-01-22

Family

ID=9363448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400459A Expired - Lifetime EP0329566B1 (fr) 1988-02-19 1989-02-17 Convertisseur d'élaboration de métal

Country Status (7)

Country Link
US (1) US4946141A (ja)
EP (1) EP0329566B1 (ja)
JP (1) JPH01272712A (ja)
AT (1) ATE71983T1 (ja)
BR (1) BR8900696A (ja)
DE (1) DE68900730D1 (ja)
FR (1) FR2627510B1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2663951B1 (fr) * 1990-06-28 1994-07-01 Clecim Sa Cuve de convertisseur pour l'elaboration de metal liquide.
DE19928195A1 (de) * 1999-06-19 2000-12-21 Sms Demag Ag Konverter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1123868A (en) * 1913-01-13 1915-01-05 Herbert Haas Converter.
FR1257664A (fr) * 1960-01-26 1961-04-07 Creusot Forges Ateliers Dispositif de contrôle des mouvements et des positions angulaires d'un organe rotatif
US3144496A (en) * 1960-02-20 1964-08-11 Demag Ag Converter support
DE1508139B2 (de) * 1966-01-11 1975-06-26 Demag Ag, 4100 Duisburg Konverter oder ähnliches metallurgisches Gefäß
FR1550338A (ja) * 1967-11-07 1968-12-20
US3548678A (en) * 1969-05-14 1970-12-22 Falk Corp Torque absorber for shaft mounted gear drives
AT336658B (de) * 1973-07-12 1977-05-25 Voest Ag Kippbarer konverter

Also Published As

Publication number Publication date
EP0329566A1 (fr) 1989-08-23
US4946141A (en) 1990-08-07
BR8900696A (pt) 1989-10-17
JPH01272712A (ja) 1989-10-31
ATE71983T1 (de) 1992-02-15
DE68900730D1 (de) 1992-03-05
FR2627510B1 (fr) 1990-08-10
FR2627510A1 (fr) 1989-08-25

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