KR20170024799A - Tundish and Method for casting using the same - Google Patents

Tundish and Method for casting using the same Download PDF

Info

Publication number
KR20170024799A
KR20170024799A KR1020150120281A KR20150120281A KR20170024799A KR 20170024799 A KR20170024799 A KR 20170024799A KR 1020150120281 A KR1020150120281 A KR 1020150120281A KR 20150120281 A KR20150120281 A KR 20150120281A KR 20170024799 A KR20170024799 A KR 20170024799A
Authority
KR
South Korea
Prior art keywords
main body
slag
melt
tundish
molten steel
Prior art date
Application number
KR1020150120281A
Other languages
Korean (ko)
Other versions
KR101749077B1 (en
Inventor
윤정균
Original Assignee
주식회사 포스코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020150120281A priority Critical patent/KR101749077B1/en
Publication of KR20170024799A publication Critical patent/KR20170024799A/en
Application granted granted Critical
Publication of KR101749077B1 publication Critical patent/KR101749077B1/en

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/04Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/06Equipment for tilting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/005Removing slag from a molten metal surface

Abstract

The present invention relates to a method for manufacturing a slag, comprising: a main body having a space for containing a melt therein; an opening and closing port formed in a bottom portion of the main body to slide the melted material; And a driving part mounted on the bottom part of the main body so as to selectively tilt the main body to the side of the slag bath, and a casting method using the same, The slag can be easily excluded, and a tundish and casting method capable of improving the casting edge can be provided.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting method,

TECHNICAL FIELD The present invention relates to a turn-dish and a casting method using the same, and more particularly, to a turn-dish having improved structure for easily excluding slag during casting and a casting method using the same.

The turn-dish provided in the continuous casting facility is a device that receives molten steel from the ladle and continuously injects it into the mold. The tundish has the function of storing molten steel and slag for a certain period of time, preventing molten steel and slag from flowing out to the outside, maintaining the temperature of the molten steel, lengthening the residence time of molten steel, and helping to separate the nonmetallic inclusions. Such a turn-over has a quadruple structure of the inner side from the outer side to the inner side, the inner side, the inflow material and the coating material. It keeps the structure and shape of the tundish so that it forms the outer wall of the tundish and protects the tundish from the hot molten material by being built inside the tundish. The inflow material and the coating material are provided as a non-metallic refractory material which is not melted in the hot melt, and are injection-molded or coated inside the soft material to prevent erosion by the hot melt.

In order to improve the function of storing the molten steel, which is a main function of the tundish, the thickness of the inflow material and the coating material should be maintained to an appropriate thickness during the tundish of the tundish, but the inflow material and the coating material are gradually eroded by the slag during the tundish There is a problem that it is difficult to maintain the thickness thereof.

In particular, the influent and coating materials are provided as basic refractories, and their erosion rate is inversely related to the basicity of the slag contained in the tundish. Therefore, when the steel containing oxygen is contained in the tundish, the basicity of the slag is lowered, so that the refractory is eluted and the erosion speed is accelerated by the equilibrium reaction.

Conventionally, in order to maintain the thickness of the inflow material and the coating material at an appropriate thickness during the tundish of the tundish, the thickness of the inflow material and the coating material is increased or the refractory material of the slag erosion portion of the tundish is reinforced. However, this method has a problem in that it is less effective than the generation cost.

KR 10-2011-0103150 A

The present invention provides an improved turn-dish structure to facilitate the discharge of slag during casting.

The present invention provides a casting method capable of easily discharging slag from a turn-off during casting.

A turn-dish according to an embodiment of the present invention includes: a main body having a space in which a melt is contained; An opening formed in a bottom portion of the main body to guide the melt; A slag bath formed on the side wall of the main body at an upper portion of the main body to discharge the slag that is floated on top of the melt and separated; And a driving part mounted on the bottom part of the main body so as to selectively tilt the main body toward the slag bath side.

Wherein an inlet of the slag duct is connected to the inside of the main body through a side wall of the main body at one side edge of the main body and an outlet of the slag duct extends downwardly inclined from an inlet of the slag bath, Can be opened from the outside.

The driving unit may be mounted at a position spaced longitudinally and widthwise from the center of the bottom of the main body.

The driving unit may be elevated in a height direction from a lower side of the main body so as to tilt the main body toward the slag bath side downward with the center axis of the bottom part of the main body being the center.

The tilting angle of the main body may be more than 0 DEG and less than 5 DEG.

A casting method according to an embodiment of the present invention includes: a process of preparing a melt; Injecting the melt into the body of the tundish; Tilting the main body toward the slag bath side of the tundish to discharge the slag that is floated and separated on the melted material; A step of bringing the main body back into place; Injecting the molten material into a mold and drawing the molten material into a cast slab; And a step of cooling the cast steel through a cooling stand.

The process of discharging the slag may include a step of tilting the main body to the side of the slag bath with respect to the width direction and discharging the slag to be floated on the upper side of the melt.

The tilting angle of the main body may be more than 0 DEG and less than 5 DEG.

According to the embodiment of the present invention, it is possible to easily discharge the slag from the tundish during casting. For example, when the continuous casting process is applied to the continuous casting process, the structure is improved so that the tundish storing the molten steel and distributing the molten steel to the mold is inclined at a predetermined angle toward the slag bath, The slag can be easily guided to the slag bath side and discharged from the tundish.

From this, it is possible to suppress the rapid erosion of the refractory of the tundish by the large amount of slag, and the tundishness of the tundish can be further improved to 10 to 20 ladles in the conventional 5 to 6 ladle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a casting installation according to an embodiment of the present invention; FIG.
2 is a view for explaining a turn-on according to an embodiment of the present invention;
3 is a view for explaining a cross-sectional structure of a portion AA 'in FIG. 2;
4 is a view for explaining the operation of the turn-off according to the embodiment of the present invention.
5 is a view for explaining a casting method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS The drawings may be exaggerated or enlarged to illustrate embodiments of the invention, wherein like reference numerals refer to like elements throughout.

Hereinafter, embodiments of the present invention will be described by way of example based on continuous casting equipment and continuous casting process of a steel mill, but the embodiments of the present invention can be applied to various equipments and processes for processing various melts.

1 is a schematic view showing a casting facility according to an embodiment of the present invention.

1, a casting installation according to an embodiment of the present invention will be described. The casting facility includes a ladle 10 containing molten steel such as molten steel and a tundish 20 located below the ladle 10 for temporarily storing molten steel supplied from the ladle 10, An immersion nozzle 30 provided below the immersion nozzle 30 for immersing the molten steel into the molten steel, a mold 40 provided below the immersion nozzle 30 for solidifying the molten steel with the molten steel, And a cooling stage (not shown) for cooling the cast steel continuously withdrawn from the casting mold 40 and running a series of molding operations.

The ladle 10 is a container of a predetermined shape, for example, a cylindrical shape, and the upper portion is opened upward, and the inside is protected by the refractory. The ladle 10 is movably provided on the upper side of the turn-dish 20, and serves to supply the molten steel contained therein to the turn-dish 20.

The turn dish 20 is a container having a predetermined shape and serves to inject molten steel from the ladle 10 into the mold 40 continuously. For this purpose, the turn-dish 20 stores molten steel and slag for a certain period of time, prevents molten steel and slag from flowing out to the outside, maintains the temperature of the molten steel, lengthens the residence time of the molten steel, And so on. For example, since the molten steel M has a specific gravity of about 7.8 and the slag S has a specific gravity of about 2.5, while the molten steel contained in the tundish 20 flows and stays in the turn-dish 20, And can be separated and separated.

2 is a schematic diagram illustrating a turn-off according to an embodiment of the present invention. Here, FIG. 2 (a) is a schematic view showing a plane of the turn-over, and FIG. 2 (b) is a schematic view showing a cross- 3 is a schematic view showing a partial sectional structure taken along line A-A 'in Fig. 2 (b).

Referring to Figs. 2 and 3, the turn-off according to the embodiment of the present invention will be described. Hereinafter, in describing the embodiment of the present invention, the longitudinal direction may be the transverse direction of FIGS. 2 (a) and 2 (b), and the transverse direction may be the longitudinal direction of FIG. 2 (a). And the height direction may be the longitudinal direction of Fig. 2 (b). This direction definition is for the purpose of describing the present invention, and each of the above-described directions can be variously defined in a manner different from the above in a range equivalent to the above-mentioned meaning of each direction.

The turn-dish 20 may include a main body, a louver 22, a slag casting 23, and a driving part 24. [ The main body may be a container provided with a space of a predetermined size and shape capable of taking molten steel therein, and a louver 22 is formed in the bottom portion to guide the molten steel therein. The upper portion of the main body is opened to the upper side, and the cover 21 is mounted on the opened upper side. At least one dam (not shown) for controlling overflow and flow of molten steel may be formed inside the body. In the embodiment of the present invention, the structure and the method of the dam are not particularly limited, so a description thereof will be omitted. The lances 22 may be formed through the bottom of the main body so as to guide molten steel and may be provided in a plurality of left-right symmetry with respect to the center position of the bottom of the turn-dish 20.

The slag duct 23 may be formed on the side wall portion of the main body at an upper portion of the main body so as to discharge the slag S to be lifted up and separated from the molten steel M. The inlet portion of the slag duct 23 is connected to the inside of the main body 20 through one of the side wall portions extending in the longitudinal direction of the side wall portion of the main body 20 at one side edge of the main body 20 in the longitudinal direction , The outlet of the slag boiler 23 can be opened from the outside of the main body 20 by extending downwardly inclined from the inlet of the slag boiler 23.

The driving unit 24 can be mounted on the bottom of the body from the outside so as to selectively tilt the main body toward the slag bath 23. At this time, at least one of the driving units 24 is mounted at a position spaced apart in the longitudinal direction and the width direction from the center of the bottom of the main body. In the embodiment of the present invention, The four driving portions 24 mounted on the position are illustrated.

The driving section 24 may be a mechanical or hydraulic cylinder device and is configured to be tilted so as to be tilted downward toward the slag casting mold 23 side with respect to the central axis in the longitudinal direction of the bottom of the main body, As shown in FIG. At this time, the tilting angle of the main body may be more than 0 DEG and less than 5 DEG with respect to the width direction.

1 to 3, the remaining constitution of the casting equipment according to the embodiment of the present invention will be described. The immersion nozzle 30 serves to supply the molten steel contained in the turn-dish 20 to the mold 40 and can be mounted through the louver 22 at the lower side of the turn-dish 20. The immersion nozzle 30 may be a hollow tube extending in a height direction, and upper and lower portions may be opened to allow molten steel to pass therethrough, and the inside may be protected by a refractory. A sliding gate (not shown) is provided on one side of the immersion nozzle 30. The gate controls the opening degree of the immersion nozzle (30) to adjust the amount of molten steel flowing.

The mold 40 may be formed in the shape of a hollow square block with open upper and lower portions and is positioned to surround the lower portion of the immersion nozzle 30 from below the turn-dish 20. The casting mold 40 serves to cast molten steel from the turn-dish 20 and solidify the casting into a cast steel, and to continuously draw downward.

The mold 40 may be a rectangular mold or a square mold. When the mold 40 is a rectangular mold, the short side plates of the mold 40 may be arranged so as to be spaced apart from each other in the width direction and parallel to the longitudinal direction, and the long side plates of the mold 40 are spaced apart from each other in the longitudinal direction, And the width in the width direction of the long side plates at this time may be formed to a width larger than 160 mm. Therefore, when the turn-dish 20 is rotated in the width direction about the central axis in the longitudinal direction of the bottom portion, for example, the immersion nozzle 30 moves along the width direction between the long- (40) can be prevented.

The mold 40 may be spaced apart from the bottom of the immersion nozzle 30 so as to have a predetermined gap in the longitudinal direction and the width direction so that when the tundish 20 is tilted about the width direction, It is possible to prevent a collision with the vehicle body 30. The inner surface of the mold 40 and the lower portion of the immersion nozzle 30 are spaced apart from each other at a predetermined interval to prevent collision between the mold 40 and the immersion nozzle 30 during tilting of the turn- .

For example, among the inner surfaces of the mold 40, the inner surfaces intersecting with the width direction may be spaced from the discharge port by an interval of 10 mm to 30 mm, . In this case, even when the mold 40 is provided as a forward mold, when the turn-dish 20 is rotated, for example, in the width direction about the central axis in the longitudinal direction of the bottom portion, the distance between the mold and the immersion nozzle 40 Collision can be prevented.

The cooling stand serves to cool the casting continuously withdrawn from the mold 40 and perform a series of molding operations. The cooling zone is provided with a plurality of segments and is arranged continuously in a predetermined direction, and each of the segments is provided with a plurality of rolls to guide the withdrawal of the strip. A nozzle is provided between each of the rolls, and the cooling water is injected into the casting. This cooling zone may be a curved or vertical curved cooling zone.

The molten steel M is first cooled in the mold 30 and solidified into the cast steel, and the cast steel is guided to a plurality of rolls at the cooling stand, and the casting is completed by secondary cooling and pressing. The casting completed is cut by a torch in a cutting part (not shown) and transferred to a post-process.

On the other hand, the main body of the turn-dish 20 has a quadruple structure of an inner side, an inner side, and an inflow material and a coating material. The iron is formed as an outer wall of the turn-dish 20 to maintain the shape of the turn-dish 20, and is formed inside the steel pipe to protect the steel pipe from hot molten steel. The inflow material and the coating material are provided as a non-metallic refractory material which is not melted in high-temperature molten steel, and are injection-molded or coated inside the furnace to prevent erosion with the high temperature molten steel.

At this time, the coating material is provided with a coating material of a basic refractory component such as MgO-SiO 2 system. When the molten steel is, for example, a high-acid steel, the basicity of the slag is relatively low. Therefore, due to the chemical equilibrium reaction between the slag and the coating material, The component may be eluted and the coating may be eroded.

For example, since the solubility of MgO is high and the amount of FeO component and MnO component, which are reducing components, is high, the refractory component of the coating material is eroded and molten by FeO, MnO and the like in the slag.

Therefore, in the embodiment of the present invention, after the molten steel is injected into the turn-dish 20, the calcium oxide (CaO) is injected into the slurry and the basicity of the slag (CaO / SiO 2 ) is controlled to be not less than 0.8, the corrosion of the coating material can be suppressed or prevented. For example, after a portion of the slag of the turn-dish 20 is sampled at six consecutive cycles, the components are analyzed to calculate the basicity, and the quicklime may be added to control the calculated basicity to a desired basicity .

For example, when the slag is modified in the above manner to increase the basicity of the slag from 0.5 to 1.5, the solubility of the MgO component of the slag is lowered and the FeO and MnO components as the reducing components in the slag become smaller, Or inhibited or prevented.

On the other hand, even if the basicity of the slag is controlled by controlling the basicity of the slag in this manner, the amount of the slag accumulated during the continuous playing may increase the erosion of the coating material if the amount exceeds the certain amount.

Therefore, in the embodiment of the present invention, the slag can be effectively removed from the upper portion of the molten steel during the continuous performance by using the slag molten metal 23 and the drive unit 24 provided in the turn-dish 20.

FIG. 4 is a process diagram illustrating the operation of the turn-off according to an embodiment of the present invention, and FIG. 5 is a flowchart illustrating a casting method according to an embodiment of the present invention. At this time, FIG. 4A shows the main body in the home state, and FIG. 4B shows the main body in the state where it is tilted toward the slag bath side.

Hereinafter, a casting method according to an embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. The casting method includes a process of preparing molten steel, a process of injecting molten steel into the main body of the tundish, a process of slagging the main body to the side of the slag bath to discharge the slag which is floated and separated on the molten steel, And drawing the mixture into a cast slab, and cooling the cast slab by passing the cast slab through the cooling slab.

First, a melt (for example, molten steel) is placed in the ladle (S100). Then, the ladle is moved to the upper side of the tundish, and the shroud nozzle provided at the lower portion of the ladle is opened to inject molten steel into the main body of the tundish (S200). At this time, the turn-dish 20 may be a turn-off time during the running performance, and the slush may be contained in the turn-off time together with the molten steel.

Thereafter, the main body is tilted to the side of the slagging bath 23 using the driving unit 24 to discharge the slag to the slagging bath (S300). For example, the driving units 24 positioned at the front side of the main body among the driving units 24 provided at the bottom of the main body, and lower the remaining driving units 24 positioned at the rear side of the main body 20. [

At this time, the main body is divided into two regions around the central axis in the longitudinal direction of the main body bottom portion, and the side wall portion side where the slag grooves 23 are formed is referred to as the rear surface of the main body.

In this state, when the molten steel is taken in the main body, the slag molten metal 23 is tilted downward in the width direction, and the slag S is overflowed by the slag molten metal 23 formed on the side wall of the main body in the longitudinal direction . The sequence of this process is shown in Figs. 4 (a) and 4 (b).

In this way, the slag floated and separated on the molten steel can be easily overflowed to the slag bath 23 in a short period of time. From this, it is possible to lower the rate of the refractory erosion of the turn-dish 20 by the slag, and for example, the turn-dish 20 having the firing angle of 5 to 6 can be cast at the firing angle of 10 to 20. Here, the edge perimeter means the number of ladles that can be cast per turndisplay.

On the other hand, the tilt angle [theta] of the main body of the turn-dish 20 may be more than 0 DEG and less than 5 DEG. If the turn dish 20 is tilted by about 5 ° to the rear end where the slag duct 23 is located, the slag S can be easily collected toward the slag duct 23, and the slag S (23). When the tilt angle? Of the main body exceeds 5 degrees, the molten steel is discharged together with the slag molten metal 23 or the slag discharging speed is increased by the slag molten metal 23, It is possible to interfere with the molten steel flow in the tundish facing the sphere. If the tilting angle of the main body exceeds 5 degrees, structural contact or collision may occur between the immersion nozzle 30 provided at the bottom of the turn-dish 20 and the mold 40, Structural interference between the immersion nozzle 30 and the mold 40 can be prevented when the main body is tilted at a tilting angle? Of 5 or less, and stable operation is possible.

When the discharge of the slag is completed, the main body is tilted to the opposite side of the slagging duct 23 and is returned to its original position (S400).

During the tilting process and the home position process of the main body, or after the win position process of the main body, the molten steel is continuously injected into the casting mold 30 and the cast steel is drawn (S500) Cooling and pressing down (S600) and continuous casting.

According to the embodiment of the present invention, when a predetermined amount of slag is accumulated, the total amount of slag in the tundish can be maintained at an appropriate level by removing the slag during the tandem performance, so that the steel containing oxygen is taken into the tundish and the basicity of the slag is relatively , It is possible to suppress the refractory erosion of the turn-by-slag by the slag. Therefore, it is possible to increase the firing rate of the oxygen-containing steel material, thereby improving the productivity of the process.

It should be noted that the above-described embodiments of the present invention are for the purpose of illustrating the present invention and not for the purpose of limitation of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

10: Ladle 20: Turndish
23: slag bath diagram 24:
30: immersion nozzle 40: mold

Claims (8)

A body having a space in which a melt is contained;
An opening formed in a bottom portion of the main body to guide the melt;
A slag bath formed on a side wall of the main body at an upper portion of the main body so as to discharge the separated slag that is floated up to the upper portion of the melt; And
And a driving part mounted on the bottom part of the main body so as to selectively tilt the main body toward the slag bath side.
The method according to claim 1,
The inlet of the slag bath is connected to the inside of the main body through a side wall of the main body at one side edge of the main body,
Wherein the outlet portion of the slag flow channel extends downwardly from the inlet portion of the slag flow channel and opens at the outside of the main body.
The method according to claim 1,
Wherein at least one of the driving portions is mounted at a position spaced longitudinally and widthwise from the center of the bottom of the main body.
The method of claim 3,
Wherein the driving portion is lifted up and down in a height direction from a lower side of the main body so that the main body is tilted downwardly inclined toward the slag bath side with the center axis of the bottom portion of the main body being the center.
The method of claim 4,
The tilt angle of the body is greater than 0 DEG and less than 5 DEG.
A process of preparing a melt;
Injecting the melt into the body of the tundish;
Tilting the main body toward the slag bath side of the tundish to discharge the slag that is floated and separated on the melted material;
A step of bringing the main body back into place;
Injecting the molten material into a mold and drawing the molten material into a cast slab; And
And cooling the cast steel through a cooling zone.
The method of claim 6,
The process of discharging the slag includes:
And tilting the main body to the side of the slag bath with respect to the width direction to discharge the slag floating on the upper portion of the melt.
The method of claim 6,
Wherein the tilting angle of the main body is more than 0 DEG and less than 5 DEG.
KR1020150120281A 2015-08-26 2015-08-26 Tundish and Method for casting using the same KR101749077B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150120281A KR101749077B1 (en) 2015-08-26 2015-08-26 Tundish and Method for casting using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150120281A KR101749077B1 (en) 2015-08-26 2015-08-26 Tundish and Method for casting using the same

Publications (2)

Publication Number Publication Date
KR20170024799A true KR20170024799A (en) 2017-03-08
KR101749077B1 KR101749077B1 (en) 2017-06-20

Family

ID=58404608

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150120281A KR101749077B1 (en) 2015-08-26 2015-08-26 Tundish and Method for casting using the same

Country Status (1)

Country Link
KR (1) KR101749077B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110103150A (en) 2010-03-12 2011-09-20 (주)인영 Tundish structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110103150A (en) 2010-03-12 2011-09-20 (주)인영 Tundish structure

Also Published As

Publication number Publication date
KR101749077B1 (en) 2017-06-20

Similar Documents

Publication Publication Date Title
KR101795470B1 (en) Casting apparatus and method thereof
EP3372326B1 (en) Molten steel treatment apparatus and method
KR101749077B1 (en) Tundish and Method for casting using the same
KR101914084B1 (en) Molten material processing apparatus
JP4725244B2 (en) Ladle for continuous casting and method for producing slab
KR20140129895A (en) Tundish for continuous casting
KR100963733B1 (en) Submerged Nozzle for Tundish
KR101969113B1 (en) Apparatus for treating molten metal
KR101794599B1 (en) Apparatus for blowing gas and apparatus for processing molten material using the same
KR101221994B1 (en) Continuous casting machine for tundish
JP2019155396A (en) Slab casting device and slab casting method
JP7364893B2 (en) Method of supplying molten steel
JP4490947B2 (en) Metal melt discharge structure.
KR100701192B1 (en) Device for preventing clogging of submerged nozzle in the continuous casting
JP6327304B2 (en) Shutter door of converter refining furnace and method of operating converter refining furnace
KR101914089B1 (en) Molten material processing apparatus and processing method
JP3470537B2 (en) Inclusion removal method in tundish for continuous casting
KR101818156B1 (en) Molten material processing method
KR20150073448A (en) Apparatus and method for treating molten metal
KR20150069272A (en) continuous casting apparatus and controlling system for cast of using it
KR20100001233U (en) Bottom Structure of Tundish
KR101460662B1 (en) Apparatus for controlling melten metal flow and the method thereof
RU2210457C1 (en) Continuous casting method
KR101462167B1 (en) Method for casting
KR100642778B1 (en) Continuous casting method

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right