KR910009998B1 - Continuous metal tube casting method and apparatus - Google Patents

Abstract

Dense, homogeneous tubular metal products (33) such as pipe is cast in long lengths continuously by introducing liquid metal (32) into the lower portion of an annular-shaped casting vessel (11). The liquid metal (32) is withdrawn in the presence of at least one elongated upwardly travelling alternating electromagnetic levitation field and a second inner electromagnetic containment field for maintaining the tubular liquid metal column (26) in a substantially weightless and pressureless condition while solidifying. The resulting solidified tubular metal product (33) is withdrawn from the upper portion of the field, cooled and further processed to result in a desired end product.

Description

Continuous casting method of metal tube, apparatus and products thereof

1 is a schematic view of the main part of a novel and improved tubular metal product casting apparatus according to the present invention.

2 is a block diagram of a continuous casting method according to the present invention using the apparatus shown in FIG.

* Explanation of symbols for the main parts of the drawings

10: storage unit 11: casting vessel / heat exchanger

12,13: casting vessel 14: central opening

15 heat exchanger 16 inlet

17: outlet 18: internal heat exchanger

18A: Header 18B: Side

18C: Central Conduit 18D: Exhaust Conduit

19: entrance 21: exit

22: multi-line winding body 23: internal multi-line winding body

24 supply conductor 25 polyphase current supply and controller

26,29: frequency controller 27,31: power controller

28: internal coil current source and controller 33: solidified tubular metal product

34: pre-cooling chamber 35, 36: exit roll

37,38: hot rolling table 38: winding table

The present invention relates to new and improved methods and apparatus for the continuous production of tubular metal products, such as pipes, and to finished products. In particular, the present invention provides electronic levitation to minimize gravity, friction and adhesion to the cast tubular metal product while maintaining maximum heat transfer efficiency between the heat exchanger and the tubular molten metal forming the product during and during the solidification. The present invention relates to a method for continuously producing a tubular metal product such as a long pipe by casting with a sheet.

Conventionally, tubular metal products in the form of pipes and the like have been produced by various techniques including the casting method described in detail in the publications related to the art. In the first and second columns of US Patent No. 4,274,470, issued June 23, 1981, a number of electronic casting apparatuses suitable for the manufacture of tubular metal products, such as pipes, have been discussed and discussed. Patents and techniques of the prior art are described. These prior arts include Getselev et al., US Patent Nos. 3,467,166, Getselev et al. US Pat. No. 3,605,865, Karlson US Pat. The content is the use of an electron mold to contain the pool in a particular dimension during the pool movement of the molten metal, and the part extending from the pool to the outside and laterally solidifying. In this process, by gravity flow to the upper end of the descending pool forming the solidified incoat, the increase of the solidified metal, whether semi-continuous or continuous, will proceed in the longitudinal direction and the molten metal will move in that direction. One of the more serious problems of this process is that no known risk prevention measures have been provided. Thus, in the case of an unexpected power cut, the molten metal would be the case of an upward casting system, but the simple operation would not be in place and would be poured from the downwardly moving pool of molten metal. In addition, due to the possibility of excessive flow and interruption of molten metal in such known white casting technology, it is necessary to carefully control both the moving speed of the molten metal and the removal rate of the solidification ingot. It is usually severely limited by the heat exchange problem, which consequently reduces the possibility.

Lohikoski and many other U.S. Patent Nos. 3,746,077 and Lohikoski's U.S. Patent No. 3,872,913, both of which were transferred to Outo Kumpo oy, Finland, are concerned with up-casting technology, in which molten metal is subjected to hydrostatic forces or pushed upwards by vacuum. When formed, it is an open end and enters a vertically placed machine mold. The casting cooled by this process is intermittently removed from physical contact with the upper end of the machine mold into which molten metal is continuously introduced. The desirable risk protection characteristics of the up-casting technique in such systems are obtained by compensating for significant wear and cracks in the external contact molds that wear out in unacceptably short time during continuous or semi-continuous operation of the system. Accordingly, there is a need for an improved continuous casting method for tubular metal products that overcomes the drawbacks of prior art electronic casting systems.

The primary object of the present invention is a novel and improved continuous casting for producing a tubular metal product such as a long and continuous pipe using the continuous casting technology and system of the tubular metal product as described above and overcoming presently known disadvantages and shortcomings. It is to provide a method and apparatus.

A feature of the present invention is the presence of a product in the presence of an electronic flotation that flows upward to minimize gravity, friction and adhesion to the cast tubular metal product while maintaining the maximum heat transfer between the solidifying tubular metal product and the heat exchanger. Provided is an improved method and apparatus for the continuous production of tubular metal products, such as long pipes, by casting.

In practicing the present invention, the method and apparatus are for producing an elongated tubular metal product comprising means for extending in an inner side of the surrounding annular casting vessel and proceeding upwards to form an electronic flotation of alternating current, It also provides a wide range of electromagnetic fields at right angles to the upwardly floating buoy. A second field generating means is provided for at least forming a second field component acting in the opposite direction to the first field in the center of the annular casting container. The liquid metal injects the liquid metal into the lower part of the annular casting casting vessel and the electromagnetic field to form a tubular liquid metal column. The value of the electron flotation acting on the tubular liquid metal column is a suitable means for minimizing the static pressure head of the column while maintaining a predetermined dimension between the outer and inner surfaces of the tubular liquid metal column and the outer side surrounding the surface of the annular casting vessel. Set to. The electromagnetic field acting on the tubular liquid metal pillar is large enough to provide a pressureless contact with the cross-sectional dimension of the tubular liquid metal pillar, but excludes the substantial gap between the inner and outer surfaces of the tubular liquid metal pillar and the outer side surrounding the surface of the annular casting vessel. To maintain effective pressureless contact and achieve maximum heat transfer between the tubular liquid metal column and the casting vessel, while minimizing gravity, friction and adhesion. The liquid metal column moves upward through the casting vessel and is thus suspended and solidified in the solidification zone surrounded by the heat exchanger, and then the solidified tubular metal product is removed from the top of the casting vessel.

During the continuous casting process, the liquid metal is continuously injected into the lower part of the casting vessel, and the solidified tubular metal product is continuously removed from the upper part of the container, where the manufacturing speed of the tubular metal product is solidified from the upper part of the container. This is determined by adjusting the removal rate of metal products and the corresponding speed at which liquid metal is injected into the bottom of the container.

In a preferred embodiment of the present invention, the second electromagnetic field generating means is generated by an upwardly moving second electromagnetic floating field generating means disposed in the central opening of the annular casting container.

When the process is initially started, the starting metal tube is joined to the tubular liquid metal column moving upward through the buoy by cooling and solidifying the upper end of the tubular liquid metal column in the magnetic field to the lower end of the starting metal tube in the solidification zone. Means are provided for discharging the starting metal tube, which is attached to the solidified tubular metal product at a rate that determines the production rate of the tubular metal product. The discharged tubular metal product is precooled as it exits the upper end of the casting vessel and is subsequently cooled to room temperature when rolling is required to the desired final product. Alternatively, initially cast with the desired dimensions, the tubular metal product is precooled as it exits the top of the casting vessel and then cooled to room temperature and stored.

Many other objects, features and advantages of the present invention will be described with reference to the accompanying drawings in which like parts are designated by like reference numerals.

U.S. Patent No. 4,414,285 to Hugh R. Lowry and Robert T. Frost, issued November 8, 1983, assigned to General Electric Company, entitled `` Continuous Metal Casting Methods, Apparatus and Products thereof ''. The present invention relates to a novel continuous metal casting method, apparatus and product thereof for casting a long, homogeneous concentration of solid metal rod by injecting a liquid metal into the bottom of the casting vessel in the presence of an extended upwardly moving alternating electron flotation. The present invention expands on the principle of Patent No. 4,414,285 to improve the method and apparatus by producing tubular metal products in the form of pipes and rods.

FIG. 1 functionally illustrates a modified device suitable for the production of long tubular metal products in a continuous manner in accordance with the present invention using the principles of No. 4,414,285. The apparatus in FIG. 1 comprises an annular molten metal reservoir 10 which is supplied with molten metal which is a pipe of another tubular metal product to be manufactured. The molten metal reservoir 10 is composed of a suitable refractory liner insulator and a heating element for keeping the molten metal in a molten state. The annular and combined casting vessel / heat exchanger indicated by (11) in the figure has an inlet leading to an opening of a corresponding shape at the top of the molten metal reservoir 10 and an annular casting vessel / heat exchanger aligned with the inlet ( It is disposed at the upper end of the reservoir 10 together with the annular inner passage of 11).

The annular casting vessel / heat exchanger 11 includes an outer cylinder-type ceramic liner 12 that is supported and protrudes in an annular passage formed at the top of the reservoir 10. The inner ceramic lining 13 is formed in an inverted cup shape disposed on the central opening 14 formed in the center of the annular molten metal reservoir 10. The side wall of the inner ceramic cup liner 13 in relation to the outer ceramic liner 12 defines an elongated annular casting vessel with molten metal in the reservoir 10 which solidifies in the form of a desired tubular metal product such as a pipe. .

Arranged around the outer ceramic liner 12 in the region immediately above the molten metal reservoir 10 is an annular heat exchanger 15, the above-mentioned U.S. Patent No. 4,414,285, which is incorporated herein in its entirety. It is assembled and operated in the same way as the heat exchanger shown and described with respect to 3 degrees. Cooling water is supplied to the heat exchanger 15 through the inlet indicated by arrow 16, and hot water is discharged from the heat exchanger through the outlet indicated by arrow 17. The second inner annular heat exchanger 18 is physically disposed immediately adjacent to the inner surface of the inner cup-shaped ceramic liner 13 for dissipating heat from the liner 13. The internal heat exchanger 18 is designed with an upper head portion 18A disposed against the lower surface of the inverted ceramic cup liner 13 and supplies coolant downward through the side portion 18B which is hung downward. The downsided side 18B is in contact with the heat and away from the downsided side of the inverted ceramic cup liner 13 that defines the annular casting vessel from which the tubular product is manufactured in relation to the cylindrical ceramic liner 12. To discharge. Cooling water is supplied to the head portion 18A through the central suction pipe 18C, and again divided in a manner as indicated by arrows 19 and 21 to the side portion 18B hanging downward of the internal heat exchanger 18. do. The entire structure is physically supported in the central opening 14 of the annular molten metal reservoir 10 by a suitable physical support (not shown). Thus, the coolant is supplied to the internal heat exchanger 18 via the central conduit 18C as indicated by arrow 19, circulated through the head portion 18A again, and then the side portion 18B by the outlet 21. Is discharged via the cup side 18B and the discharge conduit 18D which are caught downward.

The multi-wire winding agent 22 surrounds the outer periphery of the external heat exchanger 15 in the manner as shown in FIG. By way of example, the multi-line coil 22 includes twelve coils disposed vertically spaced about the outer ceramic liner 12 with the plane of the windings arranged substantially normally about the axis of the ceramic liner tube 12. . As described in detail in US Pat. No. 4,414,285, in particular in FIG. 3, each coil of the multi-wire winding 22 has a multiphase current source as shown in FIG. Are connected to three groups in a row.

The somewhat similar multi-wire winding body 23 is formed of each coil of the multi-wire winding body which is developed in a plane perpendicular to the central axis of the inverted cup liner 13 which is an internal ceramic. The coil of the winding body 23 is wound around the inner surface of the side skirt 18B of the inverted cup-shaped heat exchanger 18 inside. It is possible to configure the inner coil as a single-phase winding body, as will be described in detail later, while applying a multiphase current to the inner multi-wire winding body 23 to form a second internal downwardly movable electromagnetic field. However, in a preferred embodiment of the present invention, the inner multi-coil 23 is connected to a multi-phase winding supplied with a polyphase current via the supply conductor 24. As a result, a phase having a substantially upward movable float generated by the external multi-coil 22, but extending in a direction perpendicular to the upward movable float and opposite to a retained magnetic field component generated by the external multi-coil 22 An upwardly movable electron buoyancy field with a retaining magnetic field component is generated.

2 is a polyphase current source connected to the controller 25 and a polyphase current source whose output value is independently controlled by the power controller 27 and the frequency is independently controlled by the frequency controller 26, which is a conventional and known structure. 22 is shown. Similarly, the inner multi-wire coil 23 of FIG. 1 is independent for controlling the power and frequency values of the supply current supplied by the controller 28 to the inner spiral coil winding 23 via the supply conductor 24. It is connected to an internal coil power supply and a controller 28 having a frequency controller 29 independent of the phosphorous power controller 31. As described above, the multi-coil 23 has an outer polyphase winding 22 in the case where the current supplied by the controller 28 via the supply conductor 24 is a polyphase current capable of generating an upwardly movable electron buoy. Multi-phase winding similar to). This magnetic field is suitably nearly in phase with the uploating flotation generated by the external multi-wire coil 22, but is substantially perpendicular to the uploating flotation, and in contrast to the retention component generated by the external multi-coil 22. Have a functioning retention component.

The molten metal generated in the furnace (not shown) during operation is the upper part of the reservoir into the lower part of the annular casting vessel defined by the opposite inner surface of the outer ceramic liner 12 and the hung skirt surface outside of the inverted ceramic cupliner 13. Is supplied to the crucible reservoir 10 via an inlet 10A that is replaced from. The arrangement is based on the external and internal of the multi-coils 22 and 23 in the annular casting vessel where the molten metal 25 is defined between the ceramic walls 12 and 13, whether by gravity flow or by the pressure of the sealing of the inert gas. It is supposed to ascend to a position immediately above the lower end of the set. In order to maintain the starting point of the molten metal in the annular casting containers 12 and 13 as such, the suction molten metal, whether intermittently or continuously, is transferred into the reservoir 10 as necessary during the continuous process. At this height, the molten metal moves under the influence of not only the electromagnetic field component generated by the inner multi-line coil 23 but also the upwardly movable full floater generated by the outer coil 22. This means that the magnetic field generated by the multi-coil 23 is a coupled upwardly movable electromagnetic buoy with a holding component that acts opposite to the holding component of the supporting electromagnetic field generated by the outer multi-coil 22 or is simply a horizontally applied holding field. It is true.

During the initial initiation, the start of the tube member is injected from the upper end of the annular casting vessel 12, 13 to contact the top of the tubular liquid metal column formed by the rising molten metal in the annular casting vessel 12, 13 and the lower end of the starting tube. Go to. The upper portion 26 of the tubular liquid column solidifies in contact with the starting tube member while the coolant travels at the highest speed through the respective heat exchangers 15 and 18. Then, the solidification tube column 26 attached to the starting tube member is separated upwardly from the annular casting containers 12 and 13 by a suitable recovery roll as shown in FIG. The tubular metal column 26 attached to the starting tube is released at a rate determined by the formation rate of the solid rod, which in turn determines the production rate of the continuous casting system. During solidification in the solidification region essentially defined by the length of the multi-coils 22 and 23, the liquid metal pillars in molten and solidified form are placed in an upwardly movable electronic flotation as described in detail in U.S. Patent No. 4,414,285. Thereby substantially weightless and pressureless.

During operation, tubular liquid metal columns within the solidification range undergo unique and unexcited self-control characteristics during flotation in the manner described above. Due to this self-control characteristic, when the tubular liquid metal column is buoyant than the gravity of the liquid metal column, it is accelerated upward, resulting in a decrease in the cross-sectional area of the column. As a result, the lifting force is automatically reduced due to the reduction of the cross-sectional area of the liquid metal column due to the larger flotation force. Eventually, the slow movement of the tubular liquid metal column upwards occurs automatically and the system itself is stable and self-controlled. On the contrary, when the tubular metal pillar is decelerated due to the decrease in the flotation force, the cross-sectional area of the tubular liquid metal pillar is increased to increase the flotation force acting on the pillar, thereby accelerating the upward movement of the tubular liquid metal pillar. Thus, in the flotation zone where the upwardly moving electron flotation acts on the tubular metal column in the molten or solidified state, the system can be made to substantially reduce the flotation support of the solidified tubular liquid metal column in the solidification zone as described above. Inherent self-control.

이 되는 곳)의 하부 및 상부 단부에서의 기둥부분이 액상기둥을 초기 높이로 상승시키기 위하여 제공된 압력부에 의하여 또 전술한 출발튜브를 통하여 인가된 자장의 상승에 의하여 각각 지지된다. 따라서 튜브형 액상금속기둥이 세워지면 작은 상향 추진력이 부양장의 하단부 영역에 형성되지만, 액상 금속기둥이 상향 이동하여 부양영역의 중심부에 위치하면 본질적으로 무중량 상태에서 기둥을 세우고 유지시키기 충분한 세기의 자장이 형성되고, 환상 주조용기의 측벽(12,13)에의 접촉부는 거의 무압력으로 된다. 무압력에 의하여 액상 금속 기둥의 내부 및 외부 표면과 환상 주조용기(12,13)의 내측 주위면 사이의 연속적인 압력접촉은 없으며 튜브형 액상금속기둥은 임계 응고영역에서 실질적인 전압헤드가 없고 또 응고하는 금속기둥에 작용하는 중력, 마찰력, 접착력은 상기 임계영영에서 최소로 감소된다.While the sufficient effect of the flotation field acts on the tubular liquid metal column and most of the length of the tubular metal product solidified in the solidification zone, the solidification zone (only average of the flotation force occurring at the center of the zone)

The pillar portions at the lower and upper ends are supported by the pressure field provided for raising the liquid column to the initial height and by the rise of the magnetic field applied through the above-described starting tube, respectively. Thus, when a tubular liquid metal column is erected, a small upward thrust force is formed in the lower region of the buoy, but when the liquid metal column moves upward and is located in the center of the buoy area, a magnetic field of sufficient strength to erect and maintain the column in the essentially unweighted state is The contact portions to the side walls 12 and 13 of the annular casting container are almost pressureless. There is no continuous pressure contact between the inner and outer surfaces of the liquid metal column and the inner circumferential surface of the annular casting vessel 12, 13 by pressurelessness and the tubular liquid metal column has no substantial voltage head and solidifies in the critical solidification region. Gravity, friction and adhesion to the metal column are reduced to a minimum at the critical region.

The inner diameter of the outer cylindrical ceramic liner 12 and the outer diameter of the cylindrical skirted portion of the inner ceramic cup liner 13 are annular between the outer surface of the tubular liquid metal pillar 25 and the opposite side of the ceramic liners 12, 13. Design the gap to be minimal. This gap is not an actual gap, but sporadically or randomly occurring open space between the outer surface of the tubular metal column and the side wall of the casting vessel, which is very small in the drawing because it is important for good heat transfer to keep the dimensions very small. Is shown. However, the gaps shown in FIGS. 2 and 3 of US Pat. No. 4,414,285 are shown schematically, and do not imply a practical representative of the location or dimensions of the gaps. The gap is not constant but occurs irregularly, the presence of which is demonstrated by the outer surface of the final solidified tubular metal product, which is a shiny appearance. If the gap is allowed to be too large due to the retention component of the uplifting floating field, as is known, there is a strong inverse correlation between magnetic field strength and heat removal rate, so the opposite sides of the tubular liquid metal column and the ceramic liner (12, 13) It will severely damage the effective heat transfer between them. Eventually, the buoy strength is formed at the beginning of the casting process to form the desired pressureless contact, which results in excellent heat transfer with minimal gap clearance. In addition, the strength of the magnetic field should be maintained at this setting and should not change during the casting process, even if the removal rate of the tubular liquid metal column changes through the solidification zone.

Referring to FIG. 2, when the solidified tubular metal product is discharged from the upper end of the buoy tube assembly, it enters the precooling chamber 34 and passes through the two series hot rolling systems 37 via the exit rolls 35 and 36. After 38) it is finally cooled down and wound up on the take-up table 39. When the tubular metal product solidified in another way is finished for use in casting with a suitable diameter, it is discharged from the precooling chamber by the exit rolls 35 and 36 and subsequently transported to be cooled and wound up without further processing. .

During the process, the casting speed (i.e. the linear velocity of the tubular liquid metal column passing through the heat exchanger / lifter assembly 11) acts simultaneously with the rolling mills 37 and 38 and the winding mechanism 39. 36) to be controlled by control of the drive motor. The buoy strength and the excitation frequency are set to values calculated for the special size and resistance of the tubular metal being cast to give a range of flotation ratios of 75 to 200%. In order to reliably initiate the initiation process in the practical processes and systems of the present invention, the starting point is lower than the normal linear velocity and higher than the normal support ratio. After reaching steady state operating conditions (within 2 to 3 minutes), the linear velocity is stepwise manual until the casting rate of displacement of molten metal to the coagulated tubular metal product is maximized in terms of tons / hour. Will be increased and the flotation strength will be decreased step by step. Then keep the system at these settings for the duration of the process. In general, the temperature at which the solidified tubular metal product exits is preferably supervised with a naked eye or pyrometer when exiting the annular casting vessel for continuous manufacture.

The present invention allows the use of a novel method and apparatus for continuous casting of tubular metal products, such as pipes, which significantly reduces the wear, cracking or required force of machinery normally associated with the casting of such products using flotation electromagnetic fields. It is.

As described above, the present invention has been described in detail with reference to the accompanying drawings, the method, the apparatus and the final solidified tubular metal product, but the technical field of the present invention within the spirit and scope of the present invention as defined in the appended claims. Modifications and variations are possible by those skilled in the art.

Claims (20)

Forming an upwardly movable alternating current electron buoy extending inside the enclosing annular casting container and providing a coexistent electron holding component in a vertical direction to the upwardly movable buoy, the first within the center of the annular casting container; Forming at least a second electron retention component acting in an opposite direction to the electron retention field, injecting a liquid metal into the lower portion of the annular casting container and applying a magnetic field to form a tubular liquid metal column; Setting the value of the electronic buoy acting on the tubular liquid metal column to minimize the static pressure head of the column while maintaining a predetermined dimensional relationship between the outer and inner surfaces of the inner surface and the surface surrounding the inner side opposite the annular casting vessel. The cross sectional dimension of the tubular liquid metal column provides a pressureless contact, but the internal and Sufficient to eliminate the formation of substantial gaps between the outer surface and the surface enclosing the inner side of the annular casting vessel, allowing maximum heat transfer between the tubular liquid metal column and the casting vessel with minimal gravity, friction and adhesion. And maintaining the value of the electrons to form an effective pressureless contact, moving the casting vessel and the tubular liquid metal column upward through the casting vessel, solidifying the metal during the upward movement through the magnetic field, and solidifying the tubular shape. And removing the metal product from the top of the casting vessel. The method of claim 1, wherein the liquid metal is continuously injected into the lower portion of the casting vessel, and the solidified tubular metal product is continuously discharged from the upper portion of the casting vessel, the production rate of the tubular metal product of the solidified metal product from the top of the casting vessel Determined by controlling the release rate and controlling the corresponding injection rate at which the liquid metal is injected into the bottom of the casting vessel, the second electron holding component being driven by a second upwardly moving electron buoy which acts in the central opening of the annular casting vessel. Continuous casting method of a metal tube, characterized in that generated. 3. The tubular liquid metal pillar extending upward through the electromagnetic field is maintained in a weightless position such that a static pressure head does not substantially occur over most of the full length in the magnetic field. The cross-sectional dimension of the tubular liquid metal column is set so as to maintain a predetermined dimension relationship between the inner and outer surfaces and the surface surrounding the outer side of the annular casting container, and the inner and outer surfaces of the tubular liquid metal column and the outer side of the annular casting container. Maintained at a value that prevents substantially continuous pressure contact between the surfaces and acts on a tubular metal pillar that solidifies without damaging heat transfer between the metal pillar solidifying in the solidification zone and the surrounding casting vessel without generating a static pressure head. Characterized by reducing gravity, friction, and adhesion to a minimum Continuous casting process of metal tube. 4. The method of claim 3, wherein in the initial stage of the process the starting metal tube is connected to a tubular liquid metal column moving upward through the magnetic field by cooling and solidifying the upper end of the tubular liquid metal column in the magnetic field for the lower end of the starting metal tube. Continuous casting method of a metal tube, characterized in that. Injecting liquid metal into the lower part of the extended upward floating magnetic levitation field and interacting holding field, and reducing the gravity, friction, and adhesive force to a minimum, to maximize the heat transfer between the tubular liquid metal and the casting vessel. The inner and outer surfaces and annular column of the tubular liquid metal column at a value such that the cross-sectional dimension of the liquid metal is large enough to exclude the formation of the actual gap between the inner and outer surfaces of the tubular liquid metal and the surrounding surface of the annular casting vessel. Solidification of the metal while maintaining the tubular liquid metal in the solidification zone under conditions to minimize the static pressure head of the liquid metal while maintaining a predetermined dimensional relationship between the enclosing surfaces of the vessel. Steps appearing while moving upward and shaking through the acting holding field Shiny and product of the process according to claim 1, which has a surface of a waveform including a constant composition and a continuous high density of the metal tube diameter caused by. An elongated annular tubular casting vessel disposed in an upright position for accommodating the liquid metal to be solidified, means for moving the liquid metal to the lower portion of the annular casting vessel to form a tubular liquid metal column, and a tubular liquid metal column cooling And heat exchanger means coupled to the vessel for solidifying, means for removing the solidified tubular metal product from the top of the vessel, first electronic flotation generating means disposed around the outside of the annular casting vessel along its length; A second electromagnetic field generating means disposed at the center of the annular casting container, for generating at least a second electron holding component acting in an opposite direction to the electron holding component generated by the first electron floating field generating means; Heat transfer between the tubular liquid metal column and the casting vessel with maximum efficiency while reducing gravity, friction and adhesion In order to maintain the cross-sectional dimensions of the tubular liquid metal column, the values of the electron levitation and retention field are large enough to exclude the formation of the actual gap between the inner and outer surfaces of the tubular liquid metal column and the enclosing surface of the annular casting vessel. Means for holding, moving the tubular liquid metal column upward through the casting vessel, independent of the electron levitation and holding means generating means, and means for removing the solidified tubular metal product from the top of the casting vessel. The first and second electromagnetic field generating means reduce the static pressure head of the column and maintain a predetermined dimension relationship between the outer and inner surfaces of the tubular liquid metal column and the surrounding surface of the annular casting vessel. Continuous casting device of the tube. 7. The method of claim 6, wherein the second electromagnetic field generating means further comprises an electromagnetic levitation field generating means, wherein the first and second electromagnetic quantum generating means connect a plurality of electrons connected to a continuous phase of a polyphase current source for generating an upwardly movable AC field. Continuous casting device of a metal tube, characterized in that it comprises a coil. 8. A crucible for accommodating molten metal bath connected to the lower end of the annular casting container, and a tubular liquid metal column up to a height directly above the lower end of the first electron flotation generating means. Continuous casting device of a metal tube, characterized in that it further comprises a means coupled to the crucible. 10. The continuous casting of a metal tube according to claim 8, wherein the polyphase current source is a three-phase generator, the output and frequency of which are set to generate a uniform and coordinated upwardly movable electron buoyancy according to the type and size of the metal to be cast. Device. 10. The metal lifting tube on top of the tubular liquid metal column according to claim 9, wherein the metal rising tube is placed on top of the tubular liquid metal column by contacting the top of the tubular liquid metal column of the riser tube and solidifying the tubular metal column at the end of the riser tube while in the solidification zone at the initial start of the device. And means for operative to connect, and means for discharging the riser tube and the solidified tubular metal column attached thereto at a rate that determines the manufacturing rate of the tubular metal product. . 11. The method of claim 10, further comprising means for precooling the solidified tubular metal product as it exits from the top of the casting vessel, means for rolling the product to the desired dimensions, and means for cooling the rolled product to room temperature. Continuous casting device of a metal tube, characterized in that. 12. A continuous tube of metal tube according to claim 10, comprising means for precooling the solidified tubular metal product as it exits from the top of the casting vessel, and means for cooling the precooled tubular metal product to room temperature. Casting equipment. The continuous casting apparatus of a metal tube according to claim 6, wherein the second electron holding component generating means comprises single phase electron holding generating means for generating an externally working electron holding field acting on the tubular liquid metal column. . 15. The tubular liquid metal column as claimed in claim 13, wherein while in the solidification zone at the initial initiation of the apparatus, the top of the rise tube is brought into contact with the top of the tubular liquid metal column and the tubular metal column is solidified at the end of the rise tube. And means for acting to engage, and means for discharging the riser tube and the solidified tubular metal column attached thereto at a rate that determines the manufacturing rate of the tubular metal product. Electromagnetically boosted to form a tubular liquid metal column and advancing the tubular liquid metal column into the solidification zone, and at the same time reducing the static pressure head of the column and between the outer surface of the tubular liquid metal column and the surrounding surface of the casting vessel. Maintains almost the entire length of the column in the solidification zone included to establish the dimensional relationship, and maximizes heat transfer between the tubular liquid metal column and the casting vessel while minimizing gravity, friction and adhesion, and creates an efficient pressureless contact. In order to maintain the value of the electronic buoys and holdings to widen the cross-sectional dimensions of the liquid metal columns to prevent the formation of substantial gaps between the inner and outer surfaces of the tubular liquid metal columns and the surrounding surfaces of the casting vessel, The tube-shaped metal product solidified when Continuous casting device of a metal tube, characterized in that it comprises the step of removing from. 16. The method of claim 15, wherein most of the lengths of the tubular liquid metal pillars in the solidification zone are gravity, friction, and adhesion forces acting on the solidified metal pillars with little damage to heat transfer between the surrounding casting vessel and the solidifying tubular metal pillars. The column has almost no static head and the cross sectional dimension of the tubular liquid metal column is the pressure dimension between the inner and outer surfaces of the tubular liquid metal column and the surrounding surface of the casting vessel. A method of continuous casting of a metal tube, characterized in that it is held electronically in a predetermined dimension between the inner and outer surfaces of the tubular liquid metal column and the surrounding surface of the casting vessel so as to exclude substantially continuous pressure contact by contact. 17. The method of claim 16, wherein the tubular liquid metal column is formed continuously and proceeds to the solidification region, and the solidified tubular metal product is solidified by different means than the supporting electromagnetic field to control the manufacturing speed of the solidified tubular metal product. Continuous casting method of a metal tube, characterized in that the continuous removal from. A product produced by the process according to claim 17, having a gloss and solidified surface in a floating electromagnetic field that acts on and shakes a tubular liquid metal column without continuous pressure contact with the casting vessel. 18. The method of claim 17, wherein the upwardly movable electronic levitation field has a frequency of 1 kilohertz or more. 18. The continuous casting of a metal tube according to claim 17, wherein the electromagnetic strength of the upwardly movable buoy is determined according to the type and size of metal to be cast to provide a support ratio of 75 to 200% by weight per unit length of the liquid metal. Way.

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