US3218682A - Apparatus for molten metal supply changeover during casting - Google Patents

Apparatus for molten metal supply changeover during casting Download PDF

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Publication number
US3218682A
US3218682A US266368A US26636863A US3218682A US 3218682 A US3218682 A US 3218682A US 266368 A US266368 A US 266368A US 26636863 A US26636863 A US 26636863A US 3218682 A US3218682 A US 3218682A
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ladle
molten metal
intermediate container
mold
channel
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US266368A
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English (en)
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Namy Gerald
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SMS Concast AG
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Concast AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal

Definitions

  • the invention relates to novel apparatus for the continuous casting of metals, especially steel, and in particular to the arrangement of ladles and distributor containers, over the ingot mold or die of a continuous casting machine.
  • a pouring ladle is arranged above the die or mold and supplies an intermediate container which in turn enables feeding of the metal into the die.
  • the casting operation is initiated with a cold-slab or dummy bar, which seals the die or mold at its base, prior to the casting, and is then pulled out downwardly and afterwards separated from the slab proper.
  • the pouring ladle is emptied the casting operation is then interrupted and a cold slab is once again inserted, so as to re-commence, and continue the casting operation.
  • This procedure involves excessive down time, particularly when casting slabs.
  • the first portion of the cast strand, which follows the dummy bar and the end portion i.e., the portion formed by the molten material maintained in the mold as the feeding head
  • the end portion i.e., the portion formed by the molten material maintained in the mold as the feeding head
  • This disadvantage causes either an overheating of the fused steel mass, or requires the installation of additional heating units on the intermediate container.
  • the overheating of the fused steel mass causes disadvantages in the form of increased wear of the ladles, the increased accumulation of slag, and substantially higher melting costs.
  • the heating appliance for the intermediate container renders the plant intricate and reduces the service life of the intermediate container. It has therefore been proposed to provide a quick interchanging device for the intermediate container.
  • the proposed structures revealed disadvantages, in that the die and its suspension means were covered by dirt, when changing the intermediate container, by the steel still flowing out or by the slag. Furthermore, the cleaning of the die and its suspension is very difficult, because access is restricted.
  • the material and production losses have increased manufacturing costs.
  • the art has used large ladles. Although more metal may be poured from a large ladle, to avoid inclusion of material cooled below the casting tempera- 3,218,682 Patented Nov. 23, 1965 ture, changeover to another ladle must be made at a time when the first ladle holds a considerable amount of material. Thus, handling costs are increased. Further, on changeover, the slag carried in the stream of the new ladle enters the casting. Thus, the large ladles only decrease the frequencies of faults in the casting at the expense of increased handling costs.
  • An object of the present invention is the provision of apparatus for the continuous casting of metals which eliminates the above mentioned disadvantages.
  • the liquid metal is directed successively from containers via associated intermediate containers and their outlets in a casting mold or die.
  • the method consists in placing, before emptying a first container, at least one collecting device leading to an emergency ladle beneath the outlet of an intermediate container associated with a second container, filling the second intermediate container and turning it with its collecting device into a position above the die, turning the collecting device from the outlet of the container and clearing the way for the jet of metal to the die, simultaneously placing the collecting device associated with said first intermediate container beneath the outlet of this container to divert its jet of metal into said emergency ladle, and then turning the first intermediate container with its collecting device away from the die, the said turning movements of the intermediate containers being synchronized so that the supply of metal to the die is not substantially interrupted.
  • This process enables the fully continuous casting of a faultless slab, since, during the changing of a ladle becoming empty for a full ladle, the intermediate container associated with the full ladle is filled, the cold steel and the slag in the intermediate container are drained by a channelof the collecting device, and in the appropriate moment, when the steel flowing out of the intermediate container has reached the desired temperature, the chan nel can be removed from underneath this container, while the channel associated with the intermediate container of the empty ladle is placed underneath this latter container for collecting the slag.
  • the two intermediate containers, together with their channels, are simultaneously positioned over the die and moved away from the die respectively.
  • the intermediate containers can be interchanged without soiling the die, or its suspension. Furthermore, since the intermediate containers can be of reduced volume and accordingly the loss of temperature is small it is not necessary to overheat the steel, and therefore the costs for the brick-lining of the ladle and intermediate containers are reduced.
  • each intermediate container is pivotally mounted on a suspension means and for each spout a channel is pivotally mounted on suspension means below each intermediate container.
  • This arrangement has'the advantage that the channels can be utilized not only when changing a ladle for another one, but also when a disturbance occurs during operation of the casting plant.
  • the intermediate containers and the channels are supported on a common suspension means. This arrangement results in an exceptional simplification of the control, and in an economical, and simple space, saving construction.
  • each intermediate container and its associated channel are pivoted on a common suspension means.
  • This arrangement offers the advantage of eifecting repair and maintenance of the intermediate containers and the channels outside of the casting floor and thus to keep the workmen concerned away from the immediate vicinity of the casting machine.
  • FIGURE 1 is a side-view of an apparatus for continuous casting according to a first embodiment of the invention, partly drawn in section along the'line II of FIG- URE 2.
  • FIGURE 2 is a horizontal section taken along the line IIII of FIGURE 1, with the stoppers omitted.
  • FIGURE 3 is a view in elevation, partly drawn in section along the line III-III of FIGURE 1 with the left intermediate container removed.
  • FIGURE 4 is an illustration of the progressive dislocation of the molten streams from the various intermediate containers above the ingot mould.
  • FIGURE .5 is a view in elevation partly shown in section along the .line VV o'f FIGURE 6 showing another embodiment of the invention.
  • FIGURE 6 is a plan view partly shown in section along the line VIVI of FIGURE 5.
  • FIGURE 7 is a view in elevation partly drawn in section of the embodiment of FIGURE 6, with the left intermediate container removed.
  • FIGURE 1 shows an arrangement of two ladles 1 and 2 mounted symmetrically to the casting axis, upon a stage 3 above a pouring fioor 4.
  • the ladles 1 and 2 can be lifted out, or lowered into the stage 3, by means of a crane 5.
  • 'Two intermediate containers 6 and 7 are arranged below the ladles 1 and 2.
  • the containers are interchangeably positioned on frames 8 and 9.
  • the frames 8 and 9 are pivoted on a pillar 10.
  • the pillar 10 runs parallel to the casting axis, and is. symmetrically positioned to the ladles 1 and 2.
  • sufiicient-t-he intermediate containers 6 and 7 can be turned to a bridge or similar platform .(not shown), where they can be exchanged and/or pro-heated.
  • the swivel-movement of the intermediate containers can be achieved for example by cables 11 and 12, and by winches mounted on the stage 3.
  • Other means can however be utilized to swivel the intermediate containers 6 and 7.
  • Plugs 15 and .16 are arranged in the intermediate containers 6 and 7 to control the rate of pouring or to close the outlet nozzles 17 and 18 (FIGS. 2 and 4). The movement of the plugs 15 and 16 is controlled through compound lever systems 19 and 20 (FIG. 2).
  • Channels 21 and 22 are .arranged .below the intermediate containers 6 and 7.
  • the channels are pivoted .on the pillar 10, and open into the slag containers 23 and ,24, which if need 'be, can overflow into an emergency ladle 25.
  • FIGURE 3 an ingot mold or die 26 isshown, which can be supplied with liquid steel alternatively from the outlet nozzle 17 or 18 of the intermediate containers 6 .or 7.
  • the reference numerals 27 and 28 mark the areas where the liquid steel which flows out from the ladles 1 and 2, impinges upon the containers 6 and 7.
  • FIGURE 4 the changing from one ladle to the other is schematically illustrated.
  • the ladle 1 is almost empty, the ladle 2 which is inserted at the correct time by the crane 5 into the stage 3, starts to pour into the intermediate container 7.
  • the chan- -nel 22, under the intermediate conatiner is driven beforehand under the spout 18.
  • the intermediate-container 7 is filled with liquid metal and the slag with the too cold metal is diverted through the channel 22 into the slag container 24. If an additional plug 16 is available,
  • This suspension means is as shown in the example concerned, then it will be closed, as soon as the slag container is thoroughly rinsed, and the cold steel and slag have finished running-oil.
  • the intermediate container 7, together with the channel 22 is moved in the direction of the mold 26 into ready position.
  • the plug 16 is opened.
  • the stream from the nozzle 18, is directed into the channel 22 until the stream has cleaned the nozzle and ceases to flap.
  • the channel 22, is moved away from under the molten stream coming from the nozzle 18, and thereby, leaves the way tree for the molten stream to flow into the ingot mold.
  • the channel 21 is then simultaneously moved under the nozzle 17,and the steel coming from the intermediate container 6 at present not yet mixed with slag, is directed through the channel 21, into the slag container 23. If no plugs are available, the steel flowing from the nozzle 18, will be directed through the channel 22, until the channel 21, can be brought under the nozzle 17. In this case, the intermediate container 7 is filled while in the ready position.
  • FIGURE 4 illustrates the progressive transfer of the molten-streams which come from the nozzles 17 and 18 when inter-changing one intermediate container for the other, whereby the lines m correspond with the narrow side of the ingot mold 26.
  • Position a preparation for casting, filling of the inter-- mediate-container.
  • the molten stream coming from the nozzle 17 is still situated in the casting axis A, whilst the molten-stream coming from the nozzle 18 is directed through the channel 22.
  • the channel 21 stands in readiness.
  • Position b immediately prior to the change.
  • the intermediate container 7, together with the channel 22, is moved in the direction of the casting axis, the molten stream coming from the nozzle 18 is still being directed through the channel 22.
  • the molten stream coming from the nozzle 17 wanders away to :the right from the casting axis owing to movement of the intermediate container 6.
  • the molten stream however still flows into the mold.
  • Position c the moment of changing from nozzle 17 .to nozzle 18.
  • the intermediate container continues to be turned, whilst the turning movement of the channel 22 is stopped (the channel 22 can also be removed).
  • the intermediate container 6 is turned over the channel21, and the molten stream coming from the nozzle 17 flows into the channel 21 (the channel 21 can also be turned under the molten stream coming from the nozzle 17), whilst the molten stream coming vfrom the nozzle 18 flows into the die.
  • Position 2 the change is completely effected by 'the moltenstream coming from the nozzle 18, is in the desired place, whilst the intermediate container 6, together with the channel 21 is turned further. As soon as all the steel and slag has flowed out of this container, it can then be turned away up to and more, from its original casting position. In this position, the container can be repaired or changed. When this work is completed, the container may receive a pre-heating device so as to keep it warm for the next casting operation. Likewise, repair-work can be undertaken on the channel 21.
  • the ladle .1 is lifted out of the stage 3 by 'means of the crane 5 and returned to the steelworks to be filled in preparation .for the next casting. One could possibly omit completely the .use of ladies, and thus feed the metal direct from the furnace, via channels into the casting machine.
  • FIGURES 5, 6 and 7 show a modification of the invention.
  • the ladles 30 and 31 are interchangeable their frame, arranged above the die or mold and can be emptied into the intermediate containers 34 and 35.
  • the intermediate containers 34 and 35 are pivoted on pillars 36 and 37. These pillars are secured on trucks 38 and 39, which are movable on rails 40.
  • the arrangement of the pillars 36 and 37, and the containers 34 and 35 is so, that when being ready for casting the pillars 36 and 37 are situated externally and the containers 34 and 35 internally alongside one another (FIG. 6).
  • the channels 41 and 42 are likewise pivoted on pillars 36 and 37, below the intermediate containers, and serve exactly as described in the first example, to direct the cold steel and the slag, into the slag containers 43 and 44, and an emergency ladle 45.
  • the change from an empty ladle to a full one is achieved as described in the first example.
  • the modified arrangement has the advantage, that the intermediate containers can be brought further away from the casting machine so that the immediate vicinity around the casting machine is free of reserve intermediate containers, working tools, etc.
  • the change from one intermediate container to another is effected as described for the first example.
  • Apparatus for changeover of the supply of molten metal being poured into a mold without introduction of slag or solidified metal into the pour during the changeover comprising a mold, a first ladle of molten metal, a first intermediate container positioned below said first ladle to receive the molten metal flowing from said first ladle, said first intermediate container being provided with a first outlet nozzle to pour said received metal into said mold, a first channel positioned below said first intermediate container and adjacent said first nozzle, a second ladle of molten metal, a second intermediate container positioned below said second ladle to receive the molten metal flowing from said second ladle, said second intermediate container being provided with a second outlet nozzle through which said received molten metal flows, a second channel positioned below said second intermediate container and aligned with said second outlet nozzle, said first and second intermediate containers being rotatably mounted about vertical axes, and means for swinging said intermediate containers about the respective axis simultaneously to position said first nozzle over said first channel
  • Apparatus for changeover of the supply of molten metal being poured into a mold without introduction of slag or solidified metal into the pour during the changeover comprising a mold, a first ladle of molten metal, a first intermediate container positioned below said first ladle to receive the molten metal flowing from said first ladle, said first intermediate container being provided with a first outlet nozzle to pour said received metal into said mold, a first channel positioned below said first intermediate container and adjacent said first nozzle, a second ladle of molten metal, a second intermediate container positioned below said second ladle to receive the molten metal flowing from said second ladle, said second intermediate container being provided with a second outlet nozzle through which said received molten metal flows, a second channel positioned below said second intermediate container and aligned with said second outlet nozzle, said first and second channels being pivotally mounted about vertical axes, and means for swinging said channels about the respective axis simultaneously to position said first channel underneath said first outlet nozzle and to move
  • each of said intermediate containers together with its associate channel means are pivotally mounted on a separate suspension means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US266368A 1962-03-22 1963-03-19 Apparatus for molten metal supply changeover during casting Expired - Lifetime US3218682A (en)

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FR891898A FR1325803A (fr) 1962-03-22 1962-03-22 Procédé et dispositifs de coulée continue des métaux

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GB (1) GB969308A (en))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382913A (en) * 1965-08-25 1968-05-14 Bliss E W Co Apparatus for uninterrupted continuous casting
US3456713A (en) * 1966-09-07 1969-07-22 Bliss Co Method for supplying multiple metal streams to a continuous casting mold
US3773228A (en) * 1969-12-17 1973-11-20 Demag Ag Turret device for continuous casting installations
JPS5150820A (ja) * 1974-10-29 1976-05-04 Buehrer Erwin Yojukinzokuchunyusochi
US4031948A (en) * 1974-06-15 1977-06-28 Von Roll Ag Mold-equipped casting oven unit for continuous rod castings
CN114054732A (zh) * 2021-09-22 2022-02-18 山东杰创机械有限公司 一种双工位同步浇注系统及浇注方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH571909A5 (en)) * 1974-05-10 1976-01-30 Concast Ag
US3974874A (en) * 1975-11-24 1976-08-17 Concast Incorporated Continuous casting plant
DE3017548A1 (de) * 1980-05-08 1981-11-12 Sack GmbH, 4000 Düsseldorf Transporteinrichtung zur vollkontinuierlichen versorgung einer stranggiessanlage mit metallschmelze

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2202702A (en) * 1938-11-15 1940-05-28 American Smelting Refining Material handling mechanism
GB704620A (en) * 1949-07-25 1954-02-24 Siegfried Junghans Arrangement for the continuous casting of metals having high melting points
US3066364A (en) * 1958-03-26 1962-12-04 American Smelting Refining Pouring technique for continuous casting

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2202702A (en) * 1938-11-15 1940-05-28 American Smelting Refining Material handling mechanism
GB704620A (en) * 1949-07-25 1954-02-24 Siegfried Junghans Arrangement for the continuous casting of metals having high melting points
US3066364A (en) * 1958-03-26 1962-12-04 American Smelting Refining Pouring technique for continuous casting

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382913A (en) * 1965-08-25 1968-05-14 Bliss E W Co Apparatus for uninterrupted continuous casting
US3456713A (en) * 1966-09-07 1969-07-22 Bliss Co Method for supplying multiple metal streams to a continuous casting mold
US3773228A (en) * 1969-12-17 1973-11-20 Demag Ag Turret device for continuous casting installations
US4031948A (en) * 1974-06-15 1977-06-28 Von Roll Ag Mold-equipped casting oven unit for continuous rod castings
JPS5150820A (ja) * 1974-10-29 1976-05-04 Buehrer Erwin Yojukinzokuchunyusochi
CN114054732A (zh) * 2021-09-22 2022-02-18 山东杰创机械有限公司 一种双工位同步浇注系统及浇注方法

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GB969308A (en) 1964-09-09
FR1325803A (fr) 1963-05-03
BE629901A (en))

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