KR860000905A - Continuous casting method, apparatus and products thereof - 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 The liquid metal (32) is withdrawn in the presence of at least one elongated upwardly travelling alternating electromagnetic levitation field and a second inner electromagnetic containment field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 The resulting solidified tubular metal product (33) is withdrawn from the upper portion of the field, cooled and further processed to result in a desired end product.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, apparatus and products thereof

As this is a public information case, the full text was not included.

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: reservoir, 11: casting vessel / heat exchanger, 12, 13: casting vessel, 14: central opening, 15: heat exchanger, 16: inlet, 17: exit, 18: internal heat exchanger, 18A: header, 18B: Side, 18C: Central conduit, 18D: exhaust conduit, 19: inlet, 21: outlet, 22: multi winding, 23: internal poly winding, 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: Precooling chamber, 35, 36: Breakaway, 37, 38: Hot rolling mill, 38: Winding table.

Claims (20)

Forming an upwardly movable AC electron floater extending inside the surrounding annular casting container, preparing a coexisting electron holding component in a direction perpendicular to the upwardly movable floating container, and in the center of the annular casting container; Forming at least an electron-retaining field component acting in the opposite direction to the liquid crystal, 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, and an outer and inner surface of the tubular liquid metal column and an annular column In order to minimize the static head of the column while maintaining a predetermined dimension between the surfaces surrounding the inner side of the container, the value of the electron buoy acting on the tubular liquid metal column is set, and the cross-sectional dimension of the tubular liquid metal column is set. Provides pressurized pressure contact, but inside and outside surfaces of tubular liquid metal columns and opposite to annular casting vessels Enough to eliminate the formation of substantial gaps between the enclosing surfaces to maximize the heat transfer between the tubular liquid metal column and the casting vessel with minimum gravity, friction and adhesion, and to provide effective pressureless contact. Maintaining the value of the electromagnetic field to form and moving the casting vessel and the tubular liquid metal column upward through the casting vessel, solidifying the metal while moving upward through the magnetic field, and removing the solidified tubular metal product from the top of the casting vessel. Continuous casting method of a metal tube comprising a. 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 top of the casting vessel, the production rate of the tubular metal product of the solidified metal product from the top of the casting vessel The release rate and the corresponding injection rate at which the liquid metal is injected into the bottom of the casting vessel are determined, and the second electron holding compartment component is placed in the second upwardly moving electronic buoy which operates in the central opening of the annular casting vessel. Continuous casting method of a metal tube, characterized in that generated by. 3. The tubular liquid metal pillar extending upward through the electromagnetic field is held in a weightless position such that no static pressure head is substantially generated over most of its length in the magnetic field, and the strength of the electromagnetic field is The cross-sectional dimension of the tubular liquid metal pillar is set so as to maintain the dimensional relationship between the inner and outer surface and the surface surrounding the outer side of the annular casting vessel, and the inner and outer surface of the tubular liquid metal pillar and the outer side of the annular casting vessel. Is maintained at a value that prevents substantially continuous pressure contact between the surfaces, and does not generate a static pressure head, so that the tubular metal column solidifies without damaging heat transfer between the metal pillar solidifying in the solidification region and the surrounding casting vessel. Metals characterized by minimal reduction in applied gravity, friction and adhesion Continuous casting method of the 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. The method of claim 1, wherein the liquid is injected into the lower portion of the extended upwardly moving electromagnetic field and the interacting holding field, and heat transfer between the tubular liquid metal and the casting vessel can be obtained while minimizing gravity, friction and adhesion. In order to maximize the cross-sectional dimension of the tubular liquid metal, the inner and outer sides of the tubular liquid metal column at a value 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. While maintaining the intended dimensional relationship between the outer surface and the surrounding surface of the annular casting vessel, the metal is solidified while maintaining the tubular liquid metal in the solidification zone under conditions to minimize the static pressure head of the liquid metal. While moving up and shaking, Shiny appear is generated by the product step 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. 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 and gravity arranged in the center of the annular casting container for generating at least a first electron holding component which acts in an opposite direction to the electron holding component generated by the second electron buoy generating means; Heat transfer between the tubular liquid metal column and the casting vessel with maximum efficiency while reducing friction and adhesion is minimized. To ensure that the cross-sectional dimension of the tubular liquid metal column is 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, the value of the electron levitation and retention field Means for retaining, for moving the tubular liquid metal column upward through the casting vessel, independent of the electron flotation and reservoir 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 electron floating field generating means, wherein the first and second electromagnetic floating field generating means connect a plurality of phases connected to a continuous phase of a polyphase current source for generating an upward mobility alternating electromagnetic field. Continuous casting device for a metal tube, characterized in that it comprises two electron coils. 8. A crucible for accommodating a 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 float generating means, for placing and moving the annular casting container. 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 tubular liquid metal column according to claim 9, wherein the upper portion 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 while in the solidification region at the initial start of the apparatus. Means for activating to connect to the top, 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. Casting device. 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. 11. Combustion of a metal product 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 device. 7. The apparatus of 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 according to claim 13, wherein the upper part 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 while in the solidification zone at the initial initiation of the device. And means for dispensing the rising tube and the solidified tubular metal column attached thereto at a speed that determines the manufacturing speed of the tubular metal product. Affection between the outer surface of the tubular liquid metal column and the enclosing surface of the casting vessel to form a tubular liquid metal column and to advance the tubular liquid metal column into the solidification zone, while simultaneously reducing the static pressure head of the column. Maintains almost the entire length of the column in the solidification zone included to establish the dimensional relationship, minimizes gravity, friction and adhesion and minimizes heat transfer between the tubular liquid metal column and the casting vessel and provides efficient pressureless contact. To form the cross-sectional dimension of the liquid metal column to maintain the value of the electronic flotation and the retainer sufficiently wide to prevent the formation of a substantial gap between the inner and outer surfaces of the tubular liquid metal column and the surrounding surface of the casting vessel, Solidification area for solidified tubular metal products when the column is held electronically Continuous casting method of a metal tube comprising a step of removing from. 16. The gravity, friction, and adhesive force of claim 15, wherein most of the lengths of the tubular liquid metal columns in the solidification region act on the solidified metal columns with little damage to heat transfer between the surrounding casting vessel and the solidified tubular metal columns. The column has almost no static head and the cross sectional dimension of the tubular liquid metal column is the pressure of the cross section of the tubular liquid metal column and the pressure 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 electromagnetically 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. 17. The method of claim 16, wherein the tubular liquid metal column is formed continuously and proceeds to the solidification region, and the solidification region is formed by means different from the supporting electromagnetic field to control the manufacturing speed of the tubular metal product solidifying the solidified tubular metal product. Continuous casting method of a metal tube, characterized in that continuously removed from. 18. A product produced by the process according to claim 17, having a gloss gloss solidified in a floating electromagnetic field which acts on and shakes a tubular liquid metal column without continuous pressure contact to the casting vessel. 18. The method of claim 17, wherein the upwardly movable electron buoy 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. ※ Note: The disclosure is based on the initial application.