CN108290215B - Casting apparatus and casting method - Google Patents
Casting apparatus and casting method Download PDFInfo
- Publication number
- CN108290215B CN108290215B CN201680066514.4A CN201680066514A CN108290215B CN 108290215 B CN108290215 B CN 108290215B CN 201680066514 A CN201680066514 A CN 201680066514A CN 108290215 B CN108290215 B CN 108290215B
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- ladle
- nozzle
- hanger
- mold
- molten steel
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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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle
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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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/12—Travelling ladles or similar containers; Cars for ladles
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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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/24—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings characterised by a rectilinearly movable plate
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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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/505—Rings, inserts or other means preventing external nozzle erosion by the slag
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
Abstract
The casting apparatus according to the present invention comprises: a ladle for containing molten steel; a mold for solidifying molten steel supplied from a ladle to cast a slab; a movable hanger formed to extend in one direction to support a ladle; a ladle gripping device formed to extend in one direction such that one end thereof is connected to the hanger and the other end thereof grips the ladle; a hanger seating part provided above the top of the mold such that a hanger supporting a ladle is seated on the hanger seating part and thus the ladle supported by the hanger is positioned to correspond to the top of the mold; and a nozzle connected to a lower portion of the ladle to discharge molten steel of the ladle. Therefore, according to an aspect of the present invention, the ladle can be stably fixed at the same position at all times by the hanger seating plate and the stopper. In addition, the ladle and the nozzle may be arranged to be perpendicular to the ground without being inclined to either side by the first and second balance adjusting parts so that the molten steel may be stably supplied to the mold or the tundish.
Description
Technical Field
The present invention relates to a casting apparatus and a casting method, and more particularly, to a casting apparatus and a casting method capable of adjusting a balance between a ladle and a nozzle so that the ladle can be always positioned in the same position when the ladle is positioned in a casting position.
Background
Generally, a continuous casting process includes: a ladle for containing refined molten steel in a steelmaking process; a tundish for temporarily containing molten steel supplied from a ladle; a shroud nozzle for supplying molten steel of a ladle to a tundish; a mold for solidifying the molten steel supplied from the tundish into a predetermined shape to cast a cast slab; and a plurality of sectors arranged and installed in one direction at a lower side of the die and cooling the cast slab drawn from the die.
Here, a ladle turret as shown in korean patent laid-open publication No.2013-0120149 is used when molten steel of a ladle is supplied to a tundish. The ladle turret includes a swing tower that is rotatably driven, and ladle carriages that are installed to be connected to both sides of the swing tower and each have a ladle seated thereon. According to such a ladle turret, the ladles are alternately positioned at an upper portion of the tundish by rotation of the swing tower, and the molten steel of the ladles is discharged into the tundish, so that casting is continuously performed.
The ladle turret has the advantages that: the ladle can be stably positioned at the same position at the upper portion of the tundish at all times. However, the ladle turret is costly and has the disadvantages of: a ladle containing several hundred tons of molten steel is rotated, raised, or lowered to be positioned at a casting position, so that power consumption in the continuous casting process is large. Further, in the case of semi-continuous casting in which casting is terminated after casting a cast slab having a predetermined length, rather than continuously casting the cast slab, the operation of the ladle turret as described above becomes a more inefficient factor in terms of power consumption.
Meanwhile, in the continuous casting apparatus, the drooping of the shroud nozzle is an important factor for preventing molten steel from being re-oxidized due to the mixing of external air when molten steel of a ladle is supplied to a tundish. Generally, the shroud nozzle includes a ladle nozzle connected to a lower portion of a ladle and a long nozzle clamped to the lower portion of the ladle nozzle to supply molten steel of the ladle into a tundish. Such a shroud nozzle makes the clamping position between the ladle nozzle and the long nozzle or the sag formed by the ladle nozzle and the long nozzle different when the long nozzle is clamped to the ladle nozzle. That is, when the shroud nozzle is clamped to the ladle nozzle, in the case where the shroud nozzle is displaced to either side and the arrangement is disturbed or misalignment occurs, external air may intrude between the ladle nozzle and the long nozzle to be mixed into molten steel. Thus, when the long nozzle is clamped to the ladle nozzle, it is desirable to adjust the sag so that the long nozzle or ladle nozzle is not displaced to either side. In order to adjust the degree of sagging, a shroud manipulator as disclosed in korean patent laid-open publication No.2013-0075570 was used. The manipulator of korean patent laid-open publication No.2013-0075570 includes: a shroud arm configured to be movable back and forth relative to the long nozzle; a grip member positioned on a lower side of the shroud arm, movable forward and backward with respect to the long nozzle, and capable of gripping the long nozzle; and a hydraulic moving means installed in a lower portion of the shroud arm and capable of moving the grip member forward and backward.
However, there are problems in that the cost of the shield manipulator is high, and the shield manipulator has a complicated configuration and requires a large installation area.
Disclosure of Invention
Technical problem
The present invention provides a casting apparatus and a casting method capable of always positioning a ladle in the same position and adjusting the balance between the ladle and a nozzle when positioning the ladle in a casting position.
The present invention provides a casting apparatus which is disposed in a casting position by supporting a ladle with a simple structure and includes a ladle supporting device capable of adjusting a balance between the ladle and a nozzle, and a casting method.
Technical scheme
The casting apparatus according to the present invention comprises: a ladle for containing molten steel; a mold for solidifying molten steel supplied from a ladle to cast a cast slab; a hanger extending in one direction, supporting the ladle, and being movable; a ladle gripping device extending in a vertical direction and having one end connected to the hanger and the other end gripping the ladle; a hanger seating part installed above an upper side portion of the mold, seating a hanger for supporting a ladle on the hanger seating part, and allowing the ladle supported by the hanger to be positioned corresponding to the upper side portion of the mold; and a nozzle connected to a lower portion of the ladle and discharging molten steel of the ladle.
The hanger installation part includes: a pair of first settling brackets extending in a direction crossing an extending direction of the hanger and installed to be spaced apart from each other such that both edges of the hanger are installed on the upper portion; and a pair of second settling brackets installed to extend upward from upper portions of the pair of first settling brackets, respectively, and having two settling members installed to be spaced apart from each other by a distance greater than a width of the hanger.
The casting apparatus includes a pair of stoppers mounted at a lower edge of the hanger, wherein the pair of stoppers are mounted from a lower portion of the hanger to be spaced apart from each other by a distance smaller than a spaced distance between the pair of first settling brackets.
The nozzle includes: a first nozzle having one end connected to the ladle and a second nozzle clampable to the first nozzle; a first balance adjustment member capable of moving back and forth, grasping the second nozzle to move the second nozzle in a direction in which the first nozzle is located, clamping the second nozzle to the first nozzle, and supporting the second nozzle; and a second balance adjusting part installed at a lower side of the hanger seating part, capable of moving forward and backward and advancing toward the ladle to which the nozzle clamped by the first and second nozzles is connected, thereby supporting the ladle at a position opposite to the first balance adjusting part.
The first balance adjustment member is movable along the ladle, wherein the first balance adjustment member includes: a nozzle gripping member capable of gripping the second nozzle; an arm connected to the nozzle grip member and movable forward and backward; and a counterweight mountable on the arm at a location opposite the nozzle gripping member.
The casting apparatus includes a support member installed at a lower portion of the ladle and capable of supporting the arm.
The second balance adjusting part includes: a horizontal moving member which is movable back and forth at a position opposite to the first balance adjusting member with respect to a side surface of the ladle and supports the ladle by contacting the side surface of the ladle during the advancing.
The casting apparatus includes: a protruding portion formed in any one of the first nozzle and the second nozzle; and a clamping member provided on the other nozzle and having a clamping groove capable of receiving the protruding portion.
When the hanger is supported on the hanger seating part and the ladle is positioned above the upper side of the mold, the other end of the second nozzle is installed to be inserted into the mold, and the second balance adjusting part is fixed and installed on the upper portion of the mold cover for covering the upper portion of the mold.
The casting apparatus causes a cast slab to be drawn from the mold in a direction perpendicular to the ground.
The casting apparatus includes a tundish installed between the hanger setting part and the mold, and the other end of the second nozzle is installed to be inserted into the tundish when the hanger is supported on the hanger setting part and the ladle is positioned above the upper side of the mold. Also, a second balance adjusting part is fixed and installed on an upper portion of a tundish cover for covering an upper portion of the tundish.
A casting method comprising: supporting a ladle containing refined molten steel therein to a hanger; clamping the second nozzle to the first nozzle installed at a lower portion of the ladle; moving and seating the hanger on a hanger seating part positioned above an upper side portion of the mold such that the ladle is positioned above the upper side portion of the mold; moving molten steel of a ladle through a nozzle to supply the molten steel to a mold; and solidifying the molten steel in the mold and drawing the cast slab from the mold, wherein moving the hanger and placing the hanger on a hanger placing member positioned above an upper side portion of the mold comprises: each of one end portion and the other end portion of the hanger is seated on an upper portion of a pair of first seating brackets installed in a direction corresponding to an extending direction of the hanger.
Moving and placing the hanger on a hanger placing part positioned above the upper side of the mold is performed such that one end portion and the other end portion of the hanger are positioned between two placing members extending upward from upper portions of the pair of first placing frames and installed to be separated in a width direction of the hanger.
Clamping the second nozzle to the first nozzle comprises: clamping the second nozzle to a forward movable nozzle gripping member; operating an arm connected to the nozzle gripping member and advancing the nozzle gripping member back and forth, moving the nozzle gripping member to a lower side of the first nozzle, and clamping the second nozzle to the first nozzle; and mounting the arm weight at a position opposite to the position of the nozzle gripping member.
The method comprises, after clamping the first nozzle and the second nozzle: moving the hanger to an upper side portion of the mold and then adjusting a balance between the ladle and the first and second nozzles, wherein adjusting the balance comprises: operating a horizontal moving member installed at a lower side of the hanger seating member to advance a ladle support member connected to the horizontal moving member toward the ladle, thereby allowing the ladle support member to support a side surface of the ladle, thereby applying a force in a direction in which the nozzle gripping member is positioned such that the ladle and the first and second nozzles are adjusted to be perpendicular to the ground.
Operating the horizontally moving part to allow the ladle supporting member to support the ladle includes: advancing a first moving member coupled to the ladle support member to bring the ladle support member into contact with an outer surface of the ladle; and advancing or retreating the second moving member in a state where the second moving member connected to the ladle support member and capable of finely moving back and forth with respect to the first moving member is in contact with the ladle, so that the ladle, the first nozzle, and the second nozzle are adjusted to be perpendicular to the ground without being inclined.
Placing the hanger on a hanger placing member positioned above an upper side portion of the mold such that the ladle is positioned above the upper side portion of the mold comprises: allowing a lower portion of the second nozzle to be inserted into a mold, wherein supplying molten steel of a ladle to the mold includes: molten steel of a ladle is supplied to a mold through a first nozzle and a second nozzle.
Placing the hanger on a hanger placing member positioned above an upper side portion of the mold such that the ladle is positioned above the upper side portion of the mold comprises: allowing a lower portion of the second nozzle to be inserted into a tundish positioned between the hanger setting part and the mold, wherein supplying molten steel of the ladle to the mold includes: molten steel of a ladle is supplied to a tundish through a first nozzle and a second nozzle.
The cast slab is drawn from the mold in a direction perpendicular to the ground surface to be cast vertically, or the cast slab is arc-cast in such a manner that the cast slab is drawn from the mold in a vertical direction and then cast in a horizontal direction.
Advantageous effects
According to an embodiment of the present invention, the ladle can be stably fixed in the same position at all times by the hanger seating part. Further, the ladle and the nozzle may be disposed perpendicular to the ground without being inclined to either side, so that the molten steel may be stably supplied to the mold or the tundish.
The hanger seating part according to the embodiment has a simple structure and consumes less power to drive compared to a conventional turntable. Furthermore, there are advantages in that: the first balance adjustment part and the second balance adjustment part have a simple structure compared to a conventional shield manipulator, thereby reducing an installation space and requiring lower costs for manufacturing and operation.
Drawings
Fig. 1 and 2 are views showing a casting apparatus according to an embodiment of the present invention.
Fig. 3 (a) is a front view illustrating a first nozzle and a second nozzle according to an embodiment of the present invention. Fig. 3 (b) is a plan view showing a clamping member for clamping the first nozzle and the second nozzle, and fig. 3 (c) is an enlarged view showing the clamping member for clamping the first nozzle and the second nozzle.
Fig. 4 is a plan view illustrating a hanger and a hanger settling part for settling the hanger.
Fig. 5 is a plan view of a second balance adjusting part according to an embodiment of the present invention as viewed from an upper side.
Fig. 6 is a view for explaining an operation of a ladle supporting device according to an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The present invention relates to a casting apparatus including a ladle supporting device for supporting a ladle containing molten steel therein to supply the molten steel contained in the ladle to a mold or a tundish. More particularly, the present invention relates to a casting apparatus having an adjustable ladle supporting device so that a ladle containing molten steel can be stably positioned in the same position all the time on an upper portion of a mold or a tundish, and a nozzle for discharging molten steel is perpendicular to the ground on the upper portion of the mold or the tundish without tilting.
The ladle support device according to the embodiment allows a cast slab to be drawn from a mold in a direction perpendicular to the ground and applied to a vertical semi-continuous casting apparatus for casting a cast slab having an ultra-thick gauge thickness. In the case of the vertical semi-continuous casting apparatus according to the embodiment, molten steel of a ladle is directly supplied to a mold, and a cast slab is vertically cast. In other words, in a general vertical bending casting apparatus, molten steel of a ladle is supplied to a tundish, and molten steel of the tundish is supplied to a mold to be cast. However, in the vertical casting apparatus according to the embodiment, molten steel of a ladle is directly supplied to a mold through a nozzle to be cast into a cast slab.
In addition, in the case of a vertical semi-continuous casting facility, the amount of molten steel required for a single charge is small compared to a general vertical bending type continuous casting facility. Therefore, the ladle supporting device according to the embodiment is configured such that one ladle is supported.
Fig. 1 and 2 are views showing a casting apparatus according to an embodiment of the present invention. Fig. 3 (a) is a front view showing a first nozzle and a second nozzle according to an embodiment of the present invention, fig. 3 (b) is a plan view for explaining a clamping member for clamping the first nozzle and the second nozzle, and fig. 3 (c) is an enlarged view for explaining the clamping member for clamping the first nozzle and the second nozzle. Fig. 4 is a plan view showing a hanger and a hanger setting frame provided with the hanger corresponding to the hanger setting part according to the present invention. Fig. 2 is a plan view of the second balance adjusting part according to the embodiment of the present invention, as viewed from the upper side. Fig. 6 is a view for explaining an operation of a ladle supporting device according to an embodiment of the present invention.
Hereinafter, in the following description of the ladle supporting device according to the embodiment of the present invention, a vertical casting apparatus that directly supplies molten steel of a ladle to a mold without a tundish will be described by way of example.
Referring to fig. 1 and 2, a casting apparatus according to an embodiment of the present invention includes: a ladle L for containing refined molten steel; a mold M for solidifying the molten steel supplied from the ladle L; a mold cover C for covering an upper side portion of the mold M; a nozzle 2000 for supplying molten steel of the ladle L to the mold M, the nozzle 2000; and a ladle supporting device 1000, the ladle supporting device 1000 supporting the ladle L containing the molten steel such that the ladle L is positioned corresponding to an upper side portion of the mold M, and the ladle supporting device 1000 adjusting a balance between the ladle L and the nozzle 2000. Further, the casting apparatus includes: a surface plate 10, the surface plate 10 being used to draw a cast slab from a mold M in a direction perpendicular to the ground; and a surface plate moving means 20, which surface plate moving means 20 is used to move the surface plate 10 in a vertical direction relative to the ground.
As shown in fig. 1 and 2, the nozzle 2000 includes: a first nozzle 2100, the first nozzle 2100 being fixed and installed at a lower portion of the ladle L; and a second nozzle 2200 installed such that one end portion of the second nozzle 2200 is clamped to the first nozzle 2100 and the other end portion is positioned in the mold M to supply the molten steel of the ladle L to the mold M.
As shown in fig. 3, the first nozzle 2100 includes a top nozzle 2110 and a bottom nozzle 2120, the top nozzle 2110 is disposed in the bottom of the ladle L and installed to correspond to an outflow port from which molten steel flows, and the bottom nozzle 2120 is installed to correspond to a lower side portion of the top nozzle 2110. Further, a slide gate 2400 is installed between the top nozzle 2110 and the bottom nozzle 2120 such that communication between the top nozzle 2110 and the bottom nozzle 2120 is adjusted according to an operation of the slide gate 2400.
When molten steel is supplied to the mold M, the second nozzle 2200 is clamped to a lower portion of the first nozzle 2100, i.e., a lower portion of the bottom nozzle 2120. Here, the second nozzle 2200 may be referred to as a long nozzle or a shroud nozzle.
When the first and second nozzles 2100 and 2200 are clamped, the first and second nozzles 2100 and 2200 need to be perpendicular to the ground in a balanced manner without being inclined to either side. For this, in the present invention, a clamping member 2300 is provided between a lower portion of the first nozzle 2100 and an upper portion of the second nozzle 2200, so that the first nozzle 2100 and the second nozzle 2200 are always clamped at the same position without misalignment and become perpendicular to the ground.
The clamping member 2300 includes a protrusion 2310 and a clamping groove 2320, the protrusion 2310 being formed on either one of a lower portion of the first nozzle 2100 and an upper portion of the second nozzle 2200, the clamping groove 2320 being provided on the other one of the nozzles 2000 and receiving the protrusion 2310. For example, in the present embodiment, the protrusion portion 2310 is provided to protrude upward on the upper portion of the second nozzle 2200, and the clamping groove is provided in the lower portion of the first nozzle 2100. In this case, the protrusion 2310 is provided to be positioned at one side of the hollow portion of the second nozzle 2200, and the clamping groove 2320 is also provided to be positioned at one side of the hollow portion of the first nozzle 2100.
Of course, the protrusion 2310 may be installed in a lower portion of the first nozzle 2100, and the clamping groove 2320 may be provided on an upper portion of the second nozzle 2200.
Here, when the first and second nozzles 2100 and 2200 are clamped by the protrusion 2310 and the clamping groove 2320, the position of the protrusion 2310 and the position of the clamping groove 2310 are determined in the case where each of the first and second nozzles 2100 and 2200 is in a state of being maintained in balance without being relatively inclined to either side while being perpendicular to the ground.
The ladle supporting device 1000 includes: a ladle support unit 100 for supporting the ladle L such that the ladle L can be positioned to correspond to an upper side portion of the mold L; a balance adjustment unit 200, the balance adjustment unit 200 enabling the ladle L and the nozzle 2000 to be disposed in a balanced manner such that the ladle L and the nozzle 2000 are perpendicular to the ground during casting without being inclined to either side; and a weight measuring device installed in the ladle support unit 100 and measuring the weight of the ladle L.
The ladle support unit 100 includes: a movable hanger 110, the movable hanger 110 allowing the ladle L to be supported and positioned on an upper portion of the mold M; stoppers 130 installed at both edges of the lower portion of the hanger, the stoppers 130; a hanger seating part 120 fixed and installed on an upper portion of the mold cover and supporting the hanger 110 such that the ladle L supported to the hanger 110 can be positioned to correspond to the upper portion of the mold M; and a ladle gripping device 140, the ladle gripping device 140 having one end connected to the hanger 110 and the other end gripping the ladle L.
The hanger 110 is in the shape of a rod extending in one direction, and a ring 111 is mounted on an upper portion of the hanger 110, and a moving device such as a crane can be clamped to the ring 111. As described above, the stoppers 130 are installed at both edges of the lower portion of the hanger. The stopper 130 has a block shape and functions such that the hanger is seated at the same position when seated on the hanger seating part 120 described later.
The hanger setting part 120 is positioned at an upper side of the mold, and the hanger setting part 120 includes: a pair of first settling frames 121, the pair of first settling frames 121 being spaced apart from each other in a direction intersecting or orthogonal to an extending direction of the hanger 110; and a pair of second settling brackets 122 installed on an upper portion of each of the pair of first settling brackets 122 to be separated from each other in a width direction of the hanger 110 and by a certain thickness.
The first rest frames 121 extend in a direction intersecting or orthogonal to the extending direction of the hangers 110 and are provided as a pair. In this case, the pair of first rest frames 121 are preferably installed to be spaced apart from each other such that both edges of the hanger 110 can be supported on the pair of first rest frames 121 when the hanger 110 is positioned thereon.
The second rest 122 is mounted on an upper portion of each of the pair of first rests 121, and the second rest 122 includes a pair of rest members 122a spaced apart from each other in an extending direction of the first rest 121 and mounted to face each other. According to such a second rest 122, one end portion and the other end portion of the hanger 110 are respectively placed on the first rest 121 to be positioned between the pair of seating members 122a such that the hanger 110 is seated on the hanger seating part 120. In this case, the stopper 130 is seated on the lower portion of the hanger 110, and the stopper 130 is seated in close contact with the inner surface of the first seating step 121, thereby enabling the hanger 110 to be seated at the same position at all times.
The balance adjusting unit 200 includes: a first balance adjustment part 210, the first balance adjustment part 210 performing an adjustment operation such that the first and second nozzles 2100 and 2200 are not inclined to either side; a second balance adjusting part 220 positioned below the hanger seating part 120, seated and mounted on an upper portion of the mold cover C, and capable of moving back and forth with respect to a side surface of the ladle L, thereby performing an adjusting operation such that the ladle L is not inclined to any side; and a support member 230, the support member 230 being seated on a lower portion of the ladle L to allow the first balance adjusting part 210 to be supported in a floating state.
The first balance adjusting part 210 includes: an arm 211 that is capable of moving back and forth with respect to a second nozzle 2200 positioned at a lower side portion of the first nozzle 2100; a nozzle grip member 212 that is disposed on the front end portion of the arm 211 and grips an upper portion of the second nozzle 2200 when advanced; a weight unit 213 mounted at a position opposite to the nozzle gripping member 212 at a lower portion of the arm 211 and having a predetermined weight.
The arm 211 has a shape of a rod formed to extend in one direction. When the arm 211 is advanced and the nozzle grasping member 212 grasps the second nozzle 2200, the arm 211 passes through the support member 230 disposed on the lower portion of the ladle and is supported by the support member 230. Here, one side of the support member 230 is in the shape of an open ring portion and is supported in such a manner that the arm 211 is seated on the ring portion.
The arm 211 according to the embodiment is a hydraulic cylinder type, but is not limited thereto, and may be changed to various devices capable of moving forward and backward.
The nozzle holding member 212 has an opening shape in the direction in which the second nozzle 2200 is located, for example, an english letter "C" or a korean consonant
The shape of (2).
The first balance adjusting part 210 clamps the second nozzle 2200 to the first nozzle 2100 installed at the lower portion of the ladle L. That is, when the ladle L containing molten steel reaches the casting position, the arm 211 is moved forward in a state where the second nozzle 2200 is gripped or supported by the nozzle gripping member 212 of the first balance adjusting part 210, and the upper portion of the second nozzle 2200 is positioned to correspond to the lower portion of the first nozzle 2100, so that the first nozzle 2100 and the second nozzle 2200 are clamped to each other.
When the first nozzle 2100 is thus clamped to the second nozzle 2200, a weight is mounted on the arm 211. In this case, a rotational moment to continuously rotate the arm is generated due to the weight of the balance weight, so that a force to tilt the ladle L and the nozzle 2000 in a direction opposite to the first balance adjustment part is generated.
Accordingly, in the embodiment of the present invention, the second balance adjusting part 220 is installed between the hanger setting part 120 and the mold cover C, and a pushing force is applied from a direction opposite to the first balance adjusting part 210 toward a direction in which the first balance adjusting part 210 is located, so that the ladle L and the nozzle 2000 are adjusted to be perpendicular to the ground without tilting.
As shown in fig. 5, the second balance adjusting part 220 includes: a ladle support member 221 that can move forward and backward and supports a side surface of the ladle while moving forward; a horizontal moving part 222 for horizontally moving the ladle support member 221 by the horizontal moving part 222; and a fixing member 223, the fixing member 223 being seated on the mold cover C and supporting the horizontally moving member 222 on an upper portion of the fixing member 223.
It is preferable that the ladle support member 221 has a shape at least such that an inner surface of the ladle support member 221 coincides with an outer circumferential surface of the ladle L to easily contact and support a side surface of the ladle L. That is, the inner surface of the ladle support member 221 may have a curved shape or bent shape to conform to the shape of the outer surface of the ladle support member 221. Of course, the present embodiment is not limited thereto, and the ladle support member 221 may be in the form of a flat plate having no curvature.
The horizontal moving member 222 includes: a pair of first moving members 222a installed to be spaced apart from each other in a width direction of the ladle support member 221, and the pair of first moving members 222a having one end portion connected to the ladle support member 221; a pair of first driving members 222b for moving the pair of first moving members 222a forward and backward; a second moving member 222c positioned between the pair of first moving members 222a and having one end connected to the ladle support member 221; and a second driving member 222d for moving the second moving member 222c forward and backward.
Here, the first moving member 222a may be a roller, and the first driving member 222b may be a roller guide for moving the first moving member 222a forward and backward. The roller guide extends in a direction in which the ladle supporting member 221 is located, and the first moving member 222a can move back and forth along the first driving member 222 b. Further, the second moving member 222c and the second driving member 222d according to the embodiment are configured such that: the forward movement and the backward movement can be finely adjusted as compared with the first moving member 222a and the first driving member 222 b. Accordingly, the second driving member 222d may take the shape of a handle, and the second driving member 222d may be a device capable of moving forward and backward according to the rotational direction of the second driving member 222d and adjusting the forward and backward distance according to the amount of rotation.
As described above, when the balance weight 213 is mounted on the arm 211 of the first balance adjusting member 210, the second balance adjusting member 220 prevents the ladle L and the nozzle 2000 from being tilted in the opposite direction to the position of the first balance adjusting member 210, thereby allowing the ladle L and the nozzle 2000 to be balanced without being tilted or perpendicular to the ground. That is, when the balance weight 213 is mounted on the arm 211 of the first balance adjusting part 210, or after the balance weight 213 is mounted on the arm 211 of the first balance adjusting part 210, when the first and second moving members 222a and 222c of the horizontal moving part 222 of the second balance adjusting part 220 are moved forward to support the ladle L using the ladle support member 221, the ladle L and the nozzle 2000 are maintained in balance without tilting due to the thrust or supporting force of the horizontal moving part 222.
The present embodiment is described in an example in which the ladle supporting device 1000 is applied to a vertical casting apparatus, the ladle L is positioned to correspond to an upper side portion of the mold M, and molten steel of the ladle L is directly supplied to the mold L. However, the present embodiment is not limited thereto, and a separate tundish may be installed at the upper side of the mold M. In this case, the ladle support device 1000 supports the ladle L to position the ladle L to correspond to the upper side portion of the tundish, and thus the ladle support device 1000 may allow molten steel of the ladle L to be supplied to the tundish. Further, as another example, the present embodiment may be applied to a conventional arc casting apparatus in which a cast slab is drawn in a vertical direction and then drawn in an arc direction, instead of a vertical casting apparatus. Accordingly, the hanger seating part 120 of the ladle supporting device 1000 may be positioned above the upper side portion of the tundish cover C for covering the opening on the upper side portion of the tundish, and the second balance adjusting part 220 may be positioned on the upper side portion of the tundish.
Hereinafter, a casting process according to an embodiment of the present invention will be described with reference to fig. 1 to 6.
In the steel making process, refined molten steel is contained in a ladle L, and the ladle L supported by the hanger 110 is transferred to a position in the casting process using a moving means such as a crane (see (a) of fig. 6). Subsequently, the second nozzle 2200 is clamped to the first nozzle by using the first balance adjustment member 210, as shown in (b) of fig. 6. That is, in a state where the upper portion of the second nozzle 2200 is gripped and supported by the nozzle gripping member 212 of the first balance adjustment member 210, the arm 211 is moved forward toward the first nozzle 2100 installed in the lower position of the ladle L, and the protrusion 2310 of the second nozzle 2200 is inserted into the clamping groove 2320 of the first nozzle 2100, so that the first and second nozzles 2100 and 2200 are clamped. In this case, when the protrusion 2310 provided in the second nozzle 2200 is inserted into the clamping groove 2320 of the first nozzle 2100 so that the first and second nozzles 2100 and 2200 are clamped, the first and second nozzles 2100 and 2200 are in a state of maintaining balance without being relatively inclined to either side. After that, the arm 211 of the first balance adjusting part 210 is suspended in a manner of being supported by the support member 230 connected to the lower portion of the ladle L, and the counterweight 213 is mounted on the arm 211.
In addition, as shown in (c) of fig. 6, the hanger 110 supporting the ladle L is moved by using a moving means, and the hanger 110 is seated on the hanger seating part 120. That is, one end portion and the other end portion of the hanger 110 are disposed to be positioned between a pair of the disposition members 122a of the second disposition frame 122 located on the upper portion of the first disposition frame 121. In this case, the stopper 130 is installed at the lower portion of the hanger 110, and the stopper 130 does not move to the outside of the first seating part 121, so that the hanger 110 is always seated and installed on the constant position of the hanger seating part 120. Also, when the hanger 110 is seated on the hanger seating part 120, the lower portion of the second nozzle 2200 is installed to be positioned in the mold M through the opening of the mold cover C.
When the hanger 110 is seated on the hanger seating part 120, the first driving member 222b of the second balance adjusting part 220 is operated and the pair of first moving members 222a are moved forward such that the ladle support member 221 is brought into contact with and supported by the side surface of the ladle L. Thereafter, the second driving member 222d is operated as needed to finely advance or retreat the second moving member 222c so that the ladle L is finely adjusted to be vertical without being tilted to either side. Therefore, even in the case where a force inclined toward a position opposite or opposite to the position of the first balance adjusting member 210 is generated due to the weight of the weight member 213 of the first balance adjusting member 210, the ladle L and the nozzle 2000 are prevented from being inclined by applying a force that causes the second balance adjusting member 220 to push the ladle L in the direction in which the first balance adjusting member 210 is located, and each of the ladle L and the nozzle 2000 can be perpendicular to the ground.
When the ladle L and the nozzle 2000 are thus positioned to correspond to the upper portion of the mold M and the balance is adjusted, casting is started. That is, when the slide gate 2400 positioned between the top nozzle 2110 and the bottom nozzle 2120 of the first nozzle 2100 is operated to communicate the top nozzle 2110 with the bottom nozzle 2120, molten steel of the ladle L is supplied to the mold M through the top nozzle 2110, the bottom nozzle 2120, and the second nozzle 2200. The lower portion of the mold M is sealed by the surface plate 10 before the molten steel is supplied to the mold M so that the molten steel supplied to the mold M is solidified in the mold M. Thereafter, the surface plate 10 is continuously lowered in a direction perpendicular to the ground to draw the cast slab from the mold M. In this case, the molten steel is supplied to the mold M until a cast slab having a target length is cast, and the surface plate 10 is lowered. When a cast slab having a target length is cast, the slide gate 2400 is closed, the supply of molten steel to the mold M is stopped, the cast slab is completely drawn from the mold M, and then the descent is stopped to terminate the casting.
Therefore, according to an embodiment of the present invention, the ladle L may be stably fixed in the same position at all times by the hanger seating part 120 and the stopper 130. Further, the ladle L and the nozzle 2000 may be disposed to be perpendicular to the ground without being inclined to either side by the first and second balance adjusting parts 210 and 210, so that the molten steel may be stably supplied to the mold M or the tundish. In addition, the hanger seating part 120 according to the embodiment has a simple structure and consumes less driving power compared to the conventional turntable. In addition, the first balance adjustment part 210 and the second balance adjustment part 210 have a simple structure compared to the conventional shield manipulator, thus providing advantages of a small installation space and a low cost.
INDUSTRIAL APPLICABILITY
According to the disclosed casting apparatus and casting method, the ladle can be stably fixed at the same position all the time by the hanger mounting part. Further, the ladle and the nozzle may be disposed to be perpendicular to the ground without being inclined to either side by the first and second balance adjusting parts so that the molten steel may be stably supplied to the mold or the tundish.
Claims (17)
1. A casting apparatus comprising:
a ladle for containing molten steel;
a mold for solidifying the molten steel supplied from the ladle to cast a cast slab;
a hanger extending in one direction, supporting the ladle, and being movable;
a ladle gripping device extending in a vertical direction, and having one end connected to the hanger and the other end gripping the ladle;
a hanger seating part installed above an upper side portion of the mold, seating the hanger supporting the ladle on the hanger seating part, and allowing the ladle supported by the hanger to be positioned corresponding to the upper side portion of the mold; and
a nozzle connected to a lower portion of the ladle and discharging molten steel of the ladle,
wherein the nozzle comprises:
a first nozzle and a second nozzle, one end of the first nozzle being connected to the ladle and the second nozzle being clampable to the first nozzle;
a first balance adjustment member capable of moving back and forth, gripping the second nozzle to move the second nozzle in a direction in which the first nozzle is located, clamping the second nozzle to the first nozzle, and supporting the second nozzle; and
a second balance adjusting part installed at a lower side of the hanger seating part, capable of moving back and forth and advancing toward the ladle to which the first and second nozzles are coupled, thereby supporting the ladle at a position opposite to the first balance adjusting part.
2. The casting apparatus of claim 1, wherein the hanger seating component comprises:
a pair of first settling brackets extending in a direction crossing an extending direction of the hanger and installed to be spaced apart from each other such that both edges of the hanger are installed on an upper portion; and
a pair of second settling brackets installed to extend upward from an upper portion of each of the pair of first settling brackets, and having two settling members installed to be spaced apart from each other by a distance greater than a width of the hanger.
3. The casting apparatus of claim 2, comprising:
a pair of stops mounted at a lower edge of the hanger,
wherein the pair of stoppers are installed to be spaced apart from each other by a distance smaller than a spaced distance between the pair of first settling brackets from a lower portion of the hanger.
4. The casting apparatus according to any one of claims 1 to 3, wherein the first balance adjustment component is movable along the ladle,
wherein the first balance adjustment part includes:
a nozzle gripping member capable of gripping the second nozzle;
an arm connected to the nozzle gripping member and movable back and forth; and
a weight mountable on the arm at a location opposite the nozzle gripping member.
5. The casting apparatus of claim 4, comprising:
a support member mounted at a lower portion of the ladle and capable of supporting the arm.
6. The casting apparatus of claim 5, wherein the second balance adjustment component comprises:
a horizontal moving member that is movable back and forth at a position opposite to the first balance adjusting member with respect to a side surface of the ladle and supports the ladle by contacting the side surface of the ladle during advancing.
7. The casting apparatus of claim 4, comprising:
a protruding portion formed in any one of the first nozzle and the second nozzle; and
a clamping member disposed on the other nozzle and having a clamping groove capable of receiving the protruding portion.
8. The casting apparatus according to claim 6, wherein when the hanger is supported on the hanger setting part and the ladle is positioned above the upper side of the mold, the other end portion of the second nozzle is installed to be inserted into the mold,
wherein the second balance adjusting part is fixed and mounted on an upper portion of a mold cover for covering an upper portion of the mold.
9. The casting apparatus of claim 8, wherein the cast slab is drawn from the mold in a direction perpendicular to the ground.
10. The casting apparatus according to claim 6, comprising a tundish mounted between the hanger setting member and the mold,
wherein the other end portion of the second nozzle is installed to be inserted into the tundish when the hanger is supported on the hanger setting part and the ladle is positioned above the upper side portion of the mold,
wherein the second balance adjusting part is fixed and installed on an upper portion of a tundish cover for covering an upper portion of the tundish.
11. A casting method, comprising:
supporting a ladle containing refined molten steel therein to a hanger;
clamping a second nozzle to a first nozzle installed at a lower portion of the ladle;
moving the hanger and placing the hanger on a hanger placing member positioned above an upper side portion of a mold such that the ladle is positioned above the upper side portion of the mold;
after clamping the first nozzle and the second nozzle, comprising: moving the hanger to the upper side of the mold and then adjusting the balance between the ladle and the first and second nozzles;
moving molten steel of the ladle through a nozzle to supply molten steel to the mold; and
solidifying the molten steel in the mold and drawing a cast slab from the mold,
wherein moving the hanger and placing the hanger on the hanger placing member positioned above the upper side of the mold comprises:
disposing each of one end portion and the other end portion of the hanger on an upper portion of a pair of first disposition frames installed in a direction corresponding to an extending direction of the hanger,
wherein clamping the second nozzle to the first nozzle comprises:
clamping the second nozzle to a nozzle gripping member capable of moving back and forth,
wherein adjusting the balance between the ladle and the first and second nozzles comprises:
operating a horizontal moving member installed at a lower side of the hanger seating member to advance a ladle supporting member connected to the horizontal moving member toward the ladle, thereby allowing the ladle supporting member to support a side surface of the ladle, thereby applying a force in a direction in which the nozzle gripping member is positioned such that the ladle and the first and second nozzles can be adjusted to be perpendicular to the ground.
12. The method according to claim 11, wherein moving the hanger and placing the hanger on the hanger placing part positioned above the upper side of the mold is performed such that one end portion and the other end portion of the hanger are positioned between two placing members extending upward from an upper portion of the pair of first placing frames and installed to be separated in a width direction of the hanger.
13. The method of claim 12, wherein clamping the second nozzle to the first nozzle comprises:
operating an arm connected to the nozzle gripping member and advancing the nozzle gripping member back and forth, moving the nozzle gripping member to a lower side of the first nozzle, and clamping the second nozzle to the first nozzle; and
mounting an arm weight at a position opposite to a position of the nozzle gripping member.
14. The method of claim 13, wherein operating the horizontal movement component to allow the ladle support member to support the ladle comprises:
advancing a first moving member coupled to the ladle support member to bring the ladle support member into contact with an outer surface of the ladle; and
in a state where a second moving member connected to the ladle supporting member and capable of finely moving back and forth with respect to the first moving member is in contact with the ladle, the second moving member is moved forward or backward so that the ladle, the first nozzle, and the second nozzle are adjusted to be perpendicular to the ground without being inclined.
15. The method of claim 14, wherein placing the hanger on the hanger placement member positioned above the upper side of the mold such that the ladle is positioned above the upper side of the mold comprises:
allowing a lower portion of the second nozzle to be inserted into the mold,
wherein supplying the ladle to the mold comprises:
supplying molten steel of the ladle to the mold through the first nozzle and the second nozzle.
16. The method of claim 14, wherein placing the hanger on the hanger placement member positioned above the upper side of the mold such that the ladle is positioned above the upper side of the mold comprises:
allowing a lower portion of the second nozzle to be inserted into a tundish positioned between the hanger setting part and the mold,
wherein supplying the ladle to the mold comprises:
supplying molten steel of the ladle to the tundish through the first nozzle and the second nozzle.
17. The method of claim 15 or claim 16, wherein the cast slab is vertically cast by being drawn from the mould in a direction perpendicular to the ground, or
The cast slab is arc-cast in such a manner that the cast slab is drawn from the mold in a vertical direction and then cast in a horizontal direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150161126A KR101821254B1 (en) | 2015-11-17 | 2015-11-17 | Casting equipment and method for casting |
| KR10-2015-0161126 | 2015-11-17 | ||
| PCT/KR2016/012589 WO2017086637A1 (en) | 2015-11-17 | 2016-11-03 | Casting equipment and casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108290215A CN108290215A (en) | 2018-07-17 |
| CN108290215B true CN108290215B (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680066514.4A Active CN108290215B (en) | 2015-11-17 | 2016-11-03 | Casting apparatus and casting method |
Country Status (6)
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| EP (1) | EP3378582B1 (en) |
| JP (1) | JP6548833B2 (en) |
| KR (1) | KR101821254B1 (en) |
| CN (1) | CN108290215B (en) |
| ES (1) | ES2763081T3 (en) |
| WO (1) | WO2017086637A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT523252A1 (en) * | 2019-12-13 | 2021-06-15 | Fill Gmbh | Casting device comprising a melt transport device with at least one melt container |
| CN113664195B (en) * | 2021-08-18 | 2024-04-12 | 三鑫重工机械有限公司 | Be applied to ladle and open three-layer slide mechanism of watering |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1288767B (en) * | 1967-12-08 | 1969-02-06 | Voest Ag | Mobile pouring device |
| JPS5474718U (en) * | 1977-11-04 | 1979-05-28 | ||
| JPS5680960U (en) * | 1979-11-27 | 1981-06-30 | ||
| CN1440847A (en) * | 2003-03-03 | 2003-09-10 | 边仁杰 | Buoyancy draining long-life intermediate tank with directly replaced sprue |
| KR101056771B1 (en) * | 2009-05-29 | 2011-08-16 | 주식회사 삼우에코 | Long Nozzle Vertical Adjuster for Continuous Casting Machine |
| CN101559488B (en) * | 2009-06-02 | 2011-02-02 | 史日霞 | Automatic sand filling device and sand filling method thereof |
| CN101791695B (en) * | 2010-04-23 | 2012-07-04 | 杭州冠重铸机有限公司 | Reladling mechanism and reladling method of ladle |
| KR20120020483A (en) * | 2010-08-30 | 2012-03-08 | 현대제철 주식회사 | Device for measuring nozzle handling position and method therefor |
| KR101243130B1 (en) * | 2010-12-22 | 2013-03-12 | 주식회사 포스코 | Tilting ring for preventing separation |
| KR101379896B1 (en) * | 2011-12-27 | 2014-04-02 | 주식회사 포스코 | Apparatus guiding ladle long nozzle of continuous casting apparatus |
| KR101330580B1 (en) * | 2012-01-31 | 2013-11-26 | 현대제철 주식회사 | Device for adjust position of ladle |
| CN202824649U (en) * | 2012-07-27 | 2013-03-27 | 河北钢铁股份有限公司邯郸分公司 | Centering bracket for mounting continuous-casting submerged nozzle |
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2015
- 2015-11-17 KR KR1020150161126A patent/KR101821254B1/en active IP Right Grant
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2016
- 2016-11-03 ES ES16866589T patent/ES2763081T3/en active Active
- 2016-11-03 WO PCT/KR2016/012589 patent/WO2017086637A1/en active Application Filing
- 2016-11-03 EP EP16866589.1A patent/EP3378582B1/en active Active
- 2016-11-03 JP JP2018544011A patent/JP6548833B2/en active Active
- 2016-11-03 CN CN201680066514.4A patent/CN108290215B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018532599A (en) | 2018-11-08 |
| WO2017086637A1 (en) | 2017-05-26 |
| ES2763081T3 (en) | 2020-05-27 |
| CN108290215A (en) | 2018-07-17 |
| EP3378582B1 (en) | 2019-09-25 |
| EP3378582A1 (en) | 2018-09-26 |
| JP6548833B2 (en) | 2019-07-24 |
| KR101821254B1 (en) | 2018-01-23 |
| EP3378582A4 (en) | 2018-10-31 |
| KR20170057696A (en) | 2017-05-25 |
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