US3225397A - Ladle carriage, particularly for converters in steel mills - Google Patents

Ladle carriage, particularly for converters in steel mills Download PDF

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Publication number
US3225397A
US3225397A US181343A US18134362A US3225397A US 3225397 A US3225397 A US 3225397A US 181343 A US181343 A US 181343A US 18134362 A US18134362 A US 18134362A US 3225397 A US3225397 A US 3225397A
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US
United States
Prior art keywords
ladle
boom
carriage
converter
outrigger
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
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US181343A
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English (en)
Inventor
Grunewald Waldemar
Schops Rudolf
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Pintsch Bamag AG
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Pintsch Bamag 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 Pintsch Bamag AG filed Critical Pintsch Bamag AG
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Publication of US3225397A publication Critical patent/US3225397A/en
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    • 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
    • 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
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/10—Slag pots; Slag cars

Definitions

  • the steel After blowing of a converter, the steel is poured into a ladle which, by means of the ladle carriage, is kept close to the mouth of the tilting converter.
  • the filled ladle is transported on the carriage to the foundry where the ladle is transferred to a crane or directly emptied through a bottom opening into the ingot moulds.
  • Another object of the invention is to devise a ladle carriage that affords more accurately adapting the varying ladle position to the tilting motion of the converter while the steel is being poured into the ladle.
  • Still another object of our invention is to devise an improved ladle carriage that affords reducing the pouring distance as well as the danger of spilling and splashing to a greater extent than heretofore feasible with known ladle carriages.
  • a ladle carriage according to the invention is based upon the known design in which the free end of an outrigger boom serves to hold the ladle, and the outrigger can be moved in such a manner that the ladle, during emptying of the converter, follows approximately the path of the converter mouth.
  • an outrigger boom is designed as a double-armed lever and is mounted for motion with two degrees of freedom of which the first one affords a ladle motion in adaptation to the tilting of the converter, while the second degree of freedom permits an essentially vertical displacement of the ladle independent of the tilting of the converter.
  • the filled ladle instead of being transported to the foundry on the heavy ladle carriage, can be put upon a simple rail vehicle which then takes care of further transportation. This reduces the necessary number of the heavy and expensive steel-receiving ladle carriages and also reduces the time required for transporting the steel from the converter to the foundry.
  • the path of the ladle can be better adapted in this manner to the converter tilting motion so that the purpose of such adaptation is satisfied to an optimal extent.
  • the above-mentioned guiding contour is constituted by the longitudinal side of a guiding slot. This provides a support for the rear end of the outrigger boom and 3,225,397 Patented Dec. 28, 1965 thereby prevents it from tilting upwardly under its own weight when the boom is withdrawn into the carriage after the ladle is put off.
  • the fulcrum of the outrigger lever is preferably made displaceable in the vertical plane for producing the outrigger motion in accordance with the above-mentioned second degree of freedom.
  • the displaceability of the outrigger boom relative to a support that forms the fulcrum can be used to further advantage by giving the lower edge of the boom a cam curvature that coacts with the above-mentioned contour at the rear end of the outrigger boom in producing the motion according to the first degree of freedom.
  • the advantage of thus distributing the cam action upon two contours is the fact that the curvature of the contour at the rear end can be kept considerably smoother and shallower than if this contour were alone effective, while the curvature of the lower edge of the boom is likewise only slight.
  • the guidance at its rear end is preferably subdivided into two individual guidance portions. Since the same applies to the support of the outrigger at the fulcrum, the design may result in a statically indeterminate four-point support which may become objectionable in view of the heavy loads to be coped with. This, however, can be remedied by interconnecting the two individual supports that jointly define the fulcrum axis so as to form a mechanical or hydraulic balancing system;
  • FIG. 1 is a lateral view of the ladle carriage shown during emptying of steel from a converter into a ladle.
  • FIG. 2 shows in its left portion a section along the line AA and in its right portion a section along the line BB in FIG. 1;
  • FIG. 3 illustrates another embodiment of a ladle carriage by a section corresponding to the left portion of FIG. 2.
  • the illustrated ladle carriage comprises a frame structure 1 with lateral walls 2 and a counterpoise 3 for compensating the load.
  • the frame structure 1 is rotatable about a vertical axis on a truck 4 whose wheels 5 run on rails 6.
  • the required propulsion drive and the drive for rotating the frame structure about the vertical axis are not illustrated because they are not essential to the invention and known as such.
  • An outrigger boom 7 protrudes from the right of the frame structure 1 (FIG. 1). A portion of the boom 7 extends transversely between the two lateral walls 2 (FIG. 2) and is formed by several boxprofile structures partly visible in FIG. 2.
  • the free end 8 of the outrigger 7 is designed as a fork whose legs straddle a casting ladle 9. Two hooks 10 at the ends of the legs engage from below the respective trunnions 11 with which the ladle is conventionally provided.
  • each teeter 18 is pivoted on a lever 19 rotatable about a pivot 20 on frame structure 1.
  • the piston 21 of a hydraulic drive has its head 24 articulately joined with the outrigger boom 7.
  • the ap pertaining hydraulic cylinder 22 is located centrally between the lateral walls 2 and is tiltably mounted at 23 on the frame structure 1.
  • the hydraulic drive has a doubleacting design and serves to displace the boom 7 longitudinally on the roller pairs 16, 17.
  • Two further hydraulic drives serve for rotating the respective levers 19.
  • the appertaining hydraulic cylinders 25 are pivotally attached at 26 to the frame structure 1, and the respective pistons 27 are connected with the levers 19 by respective links 28.
  • the two cylinders 25 are hydraulically connected in parallel. This is indicated in FIG. 2 by a pressure line 29 interconnecting the two cylinders 25.
  • the ladle carriage is run to the location of a converter 30 to be emptied, with the outrigger boom 7, carrying an empty ladle 9, withdrawn into the carriage.
  • the converter 30 is tilted about the axis of its trunnions 31 after the blowing operation is terminated.
  • the pouring of the steel commences when the converter assumes the dot-and-dash position.
  • the boom 7 is placed in the position where the ladle edge and ladle trunnion are at the respective locations denoted by I.
  • the boom 7 is run out of the carriage a further extent so that the ladle passes successively through the positions II, III, IV and ultimately reaches the end position V.
  • the dot-and-dash curves denoted by x and y indicate the travel path of the edge 32 at the converter mouth 33 and of the ladle edge 34 respectively. It will be recognized from these paths that the ladle accurately follows the tilting motion of the converter mouth.
  • the path 3 is obtained by giving the upper edge 35 of slot 14- a suitable guiding contour and also applying a corresponding guide curvature to the lower edge on the boom 7. If only one of these two expedients were used, considerably steeper curvatures either at edge 35 or at edge 15 would result and would cause correspondingly unfavorable stresses and strains.
  • the boom 7 When the ladle 9 is filled and the converter 30 tilted back to its base position, the boom 7 is withdrawn into the carriage and the frame structure 1 is turned 90 about the vertical axis.
  • the carriage can new travel on rails 6 away from the converter, for example to another rail on which a simple platform car is available for further transportation of the ladle.
  • the boom 7 For lowering the ladle onto the vehicle, the boom 7 is run out for moving the ladle to above the car. Then the boom 7 is lowered by rotation of the levers 19 with the aid of the drives 25, 27, until the ladle is set upon the platform of the car and the hooks 10 have released the ladle trunnions 11. Thereafter the boom 7 can be moved back into the ladle carriage.
  • the guide slots 14 then prevent the boom from turning upwardly under its own weight. While the ladle is being transported away on a separate, simpler vehicle, the ladle carriage is again ready to receive an empty ladle and can travel to another converter to be discharged.
  • the hydraulic parallel connection of the two cylinders has the action of a balancing system which causes the two rails 36, by means of which the boom 7 rests upon the respective two pairs of rollers 16 and 17, to always impose equal forces upon these rollers.
  • the outrigger boom 7 is thus supported in a statically definite manner.
  • levers 19 are not limited to affording a filled ladle 9 to be put off the outrigger boom by lowering the latter or conversely to load an empty ladle onto the boom. These levers 19 also permit adjusting and displacing the path y of the ladle edge. This may become necessary or desirable if converters of different dimensions are to be serviced by the same ladle carriage in the same plant, and also if the path x has changed by material burning away from the converter spout.
  • ladle carriages according to the invention are also applicable to advantage in other plants requiring molten metal to be poured from a containing vessel structure into a casting ladle by tilting the vessel structure, such as the pouring of aluminum or other light metal from a tilting crucible into a ladle from which the metal is cast into moulds.
  • the invention affords keeping the pouring distance uniformly short and preventing or greatly minimizing the danger of spilling or splashing, aside from permitting a greater versatility of ladle motion for other purposes.
  • a ladle carriage for converters in steel plants and similar purposes comprising a wheeled truck and a frame structure thereon, said frame structure having fixed guide means forming a guide contour extending in a given direction, roller means engaging with said guide means and guidingly displaceable along said contour, a rigid boom forming a double-armed lever extending generally in the given direction of said contour, said lever having an arm fulcrummed on said roller means in guided relation with said contour and being displaceable with said roller means relative to said frame structure in the given direction of said contour, said lever also having a bifurcated frontal arm protruding beyond said frame structure and having two legs for straddling a ladle and adapted at the respective leg ends to hold the ladle, two supporting rollers engaging each of said respective legs from below and being arranged behind each other longitudinally of said lever, a teeter member on which said two rollers are journalled, an arm member pivotally joined with said teeter member and pivotally mounted on said frame structure for raising and lowering said

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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)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US181343A 1961-04-01 1962-03-21 Ladle carriage, particularly for converters in steel mills Expired - Lifetime US3225397A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP0026877 1961-04-01

Publications (1)

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US3225397A true US3225397A (en) 1965-12-28

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US (1) US3225397A (fr)
BE (1) BE611297A (fr)
LU (1) LU40826A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061231A (en) * 1975-07-01 1977-12-06 Midcon Pipeline Equipment Co. Pipe handling apparatus for pipe laying barges
EP2011959A3 (fr) * 2007-07-02 2017-03-29 Control Flow Inc. Ensemble de suspension à rouleau

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1629184A (en) * 1925-03-25 1927-05-17 Acec Foundry ladle crane
FR665205A (fr) * 1927-11-30 1929-09-16 Bamag Meguin Ag Dispositif, actionné électriquement, de montée et de descente de la chaudière des chariots à couler
FR743000A (fr) * 1933-03-21
DE614338C (de) * 1935-06-06 Demag Akt Ges Giesswagen
US2292599A (en) * 1940-11-04 1942-08-11 Kelsey Hayes Wheel Co Casting apparatus
US2892225A (en) * 1954-06-23 1959-06-30 Buhrer Erwin Process and means for casting system for operating pouring ladles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR743000A (fr) * 1933-03-21
DE614338C (de) * 1935-06-06 Demag Akt Ges Giesswagen
US1629184A (en) * 1925-03-25 1927-05-17 Acec Foundry ladle crane
FR665205A (fr) * 1927-11-30 1929-09-16 Bamag Meguin Ag Dispositif, actionné électriquement, de montée et de descente de la chaudière des chariots à couler
US2292599A (en) * 1940-11-04 1942-08-11 Kelsey Hayes Wheel Co Casting apparatus
US2892225A (en) * 1954-06-23 1959-06-30 Buhrer Erwin Process and means for casting system for operating pouring ladles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061231A (en) * 1975-07-01 1977-12-06 Midcon Pipeline Equipment Co. Pipe handling apparatus for pipe laying barges
US4067450A (en) * 1975-07-01 1978-01-10 Midcon Pipeline Equipment Co. Pipe handling apparatus for pipe laying barges
EP2011959A3 (fr) * 2007-07-02 2017-03-29 Control Flow Inc. Ensemble de suspension à rouleau

Also Published As

Publication number Publication date
BE611297A (fr) 1962-03-30
LU40826A1 (fr) 1962-01-14

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