[go: up one dir, main page]

WO2019117553A1 - Dispositif de traitement de matériau fondu - Google Patents

Dispositif de traitement de matériau fondu Download PDF

Info

Publication number
WO2019117553A1
WO2019117553A1 PCT/KR2018/015563 KR2018015563W WO2019117553A1 WO 2019117553 A1 WO2019117553 A1 WO 2019117553A1 KR 2018015563 W KR2018015563 W KR 2018015563W WO 2019117553 A1 WO2019117553 A1 WO 2019117553A1
Authority
WO
WIPO (PCT)
Prior art keywords
melt
dam
container
flow
molten material
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2018/015563
Other languages
English (en)
Korean (ko)
Inventor
김성줄
서정도
안종태
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
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 Posco Co Ltd filed Critical Posco Co Ltd
Priority to CN201880079794.1A priority Critical patent/CN111448012A/zh
Priority to JP2020531030A priority patent/JP2021505397A/ja
Priority to EP18888361.5A priority patent/EP3725430A4/fr
Publication of WO2019117553A1 publication Critical patent/WO2019117553A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • B22D41/003—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with impact pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/116—Refining the metal
    • B22D11/118—Refining the metal by circulating the metal under, over or around weirs
    • 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

Definitions

  • the present invention relates to a melt processing apparatus, and more particularly, to a melt processing apparatus capable of reducing the stagnation region to improve inclusion removal capability.
  • a typical continuous casting facility includes a ladle for transporting molten steel, a tundish for temporarily storing and receiving molten steel from the ladle, and continuously supplying molten steel from the tundish to the slab A first coagulating mold, and a cooling device for secondarily cooling the cast steel continuously withdrawn from the mold and performing a series of molding operations.
  • the molten steel stay in the turn-off time for a sufficient time.
  • the molten steel must be retained for a sufficient time in the interior of the tundish so that the inclusions can be smoothly separated from the molten steel.
  • the upward flow of the molten steel must be actively induced in the turn-off time.
  • Patent Document 1 discloses a method of controlling the flow control of molten steel using a dam and a weir to construct a plurality of refractory dams in a tundish such as a dam, an auxiliary dam, and an induction dam, and then argon gas is injected into the molten steel through an auxiliary dam, A method of inducing an upward flow of molten steel is proposed.
  • Patent Document 2 after the impact pads and the separating wall are installed on the lower side of the shroud nozzle, the molten steel is collided with the impact pad, passes through the space between the separating wall and the impact pad, and positively induces an upward flow of molten steel Method is presented.
  • Patent Documents 1 and 2 have a disadvantage in that a manufacturing cost for constructing a plurality of dams in a turn-off time is added, installation work becomes complicated, and the number of refractory dams and the back surface of the separation wall ) And a stagnation region in which the flow velocity of molten steel is very low near the region far from the impact pad.
  • the degree to which the molten steel stays in the stagnation region becomes excessive, and the residence time of the molten steel becomes excessively long. That is, when the congestion region of the molten steel increases in the turn-on time, the molten steel does not secure a proper residence time within the turn-off time. If the inclusions enter the stagnation region, the inclusions stay at the center of the stagnation region due to the low flow velocity of the molten steel, and are not separated from the molten steel, and flow into the molds to finally cause quality defects.
  • Patent Document 1 KR10-2014-0085127 A
  • Patent Document 2 KR10-1602301 B1
  • the present invention provides a melt processing apparatus capable of ensuring a sufficient and adequate residence time of a melt contained in a container.
  • the present invention provides a melt processing apparatus capable of reducing the stagnation area of a melt to improve the ability to remove inclusions.
  • the present invention provides a melt processing apparatus capable of widely distributing an ascending flow reaching an upper surface of a melt.
  • a melt processing apparatus includes a container having a melt receiving space formed therein, a melt injection portion disposed on one side, and a melt outlet formed on the other side; And a dam disposed between the injection port and the discharge port such that the one surface directly faces the injection port and connected to both longitudinally opposite sidewalls mounted on the bottom of the container, And the upper surface is located on the upper portion of the melt.
  • the dam may be provided at an edge of the drop area.
  • the other surface of the dam can directly face the lateral side wall of the discharge port side.
  • the size of the drop area is proportional to the size of the inner diameter of the injection part, and the distance between one side of the dam and the injection part may be proportional to the size of the drop area.
  • the distance between one surface of the dam and the injection unit may be in a range of 2.5 to 5 times the inner diameter of the injection unit.
  • the height of the upper surface of the dam may be in the range of 0.5 to 0.75 times the height of the melt surface of the melt.
  • the through-hole is formed in a lower portion of the dam, and is formed in a direction from the one side to the other side, and the inner wall can be directly connected to the bottom.
  • a dam on the bottom of the container so as to be located at the edge of the molten metal of the melt, and optimize the height of the top surface of the dam to optimize the flow field of the melt.
  • sufficient and adequate residence time of the melt contained in the container can be ensured, and the stagnation area of the melt can be reduced to improve the ability to remove inclusions.
  • a strong flow of the molten steel in the molten metal can be directed to the upper surface of the molten metal to form a rising current, so that the rising current reaching the upper surface of the molten metal can be widely distributed.
  • the inclusions in the melt can be smoothly separated and floated, the cleanliness of the melt can be improved, and the quality of the product made of the melt can be improved.
  • the size and the number of the refractory structures provided in the container can be minimized and optimized, and the structure can be simplified, .
  • FIG. 1 is a view for explaining a modeling structure for evaluating a flow of a melt processing apparatus according to an embodiment of the present invention and comparative examples.
  • FIG. 1 is a view for explaining a modeling structure for evaluating a flow of a melt processing apparatus according to an embodiment of the present invention and comparative examples.
  • FIG. 2 is a view showing a result of flow evaluation of a melt processing apparatus according to an embodiment of the present invention and comparative examples.
  • FIG. 3 is a graph showing quantitative values of the flow characteristics of the melt derived from the flow evaluation results in accordance with embodiments of the present invention and comparative examples.
  • FIG. 4 is a view for explaining a modeling structure for evaluating the flow of a melt processing apparatus according to embodiments and comparative examples of the present invention.
  • FIG. 5 is a graph showing quantitative values of flow characteristics of a melt derived from flow evaluation results according to embodiments of the present invention and comparative examples.
  • FIG. 6 is a view showing results of flow evaluation according to embodiments of the present invention.
  • FIG. 7 and 8 are schematic views of a melt processing apparatus according to an embodiment of the present invention.
  • the melt processing apparatus proposes a technical feature capable of increasing the ascending flow reach area of the upper surface of the melt while reducing the stagnation area of the melt and improving the inclusion removal capability.
  • the apparatus for processing a melt according to an embodiment of the present invention is applied to a continuous casting process of a steel mill, but can also be applied to various casting processes using various melts. An embodiment of the present invention will be described based on a continuous casting process.
  • FIG. 7 and 8 are schematic diagrams showing a melt processing apparatus according to an embodiment of the present invention.
  • Fig. 7 is a cross-sectional view of the melt processing apparatus
  • Fig. 8 is a perspective view of the melt processing apparatus.
  • the direction in which one side wall 1a in the width direction shown in Fig. 7 and the other side wall 1b in the width direction are separated from each other is one direction
  • the direction in which the injection portion 2 extends is the up and down direction
  • the direction intersecting both the one direction and the height direction is the other direction.
  • the direction in which the dam 3 shown in Fig. 8 extends is the other direction.
  • One direction may be referred to as a longitudinal direction
  • the up and down direction may be referred to as a height direction.
  • the melt processing apparatus comprises a container 1 in which a melt receiving space is formed and a melt injection unit 2 is disposed on one side and a melt discharge port 1c is formed on the other side, And a dam 3 which is disposed between the injection part 2 and the discharge port 1c so as to directly face the container 1 and is connected to both longitudinal side walls 1d at the bottom of the container 1.
  • the dam 3 is installed in the falling region of the melt formed on the lower side of the injection part 2, and the upper surface is located on the upper part of the molten material.
  • the melt may comprise molten steel.
  • the melt may be carried in a transport container, such as a ladle (not shown), to a melt processing device, disposed above the container 1, and connected to the injection section 2.
  • the melt can be injected into the interior of the container 1 through the injection part 2.
  • the melt may be varied other than the molten steel.
  • the lower part of the melt is a section from the bottom of the container 1 to a height of less than 0.5 times the height of the melt surface of the melt.
  • the upper portion of the melt is a section from a height of 0.5 times the height of the melt surface of the melt to the melt surface of the melt. For example, if the bottom height of the vessel 1 is zero and the melt surface height of the melt is 1, the height from 0 to less than 0.5 is the bottom of the melt and the height from 0.5 to 1 is the top of the melt.
  • the height of the melt surface of the melt means the height of the melt formed at a constant height in the container 1 in the steady state during the continuous casting process.
  • the height of the melt surface of the melt may be referred to as the melt level or the melt level.
  • the steady state means a steady state for the melt flow in the vessel 1.
  • the injection part 2 may be a reflow nozzle through which the melt can pass, and may be a shroud nozzle.
  • the injection section 2 is mounted on a manipulator (not shown), and by the elevation of the manipulator, the upper opening can be coupled to the collector nozzle (not shown) of the transport container.
  • the injection part 2 is disposed on one side of the container 1 and is spaced from the bottom of the container 1 and the bottom opening is located inside the container 1 and at least a part can be immersed in the melt.
  • a dropping region (hereinafter referred to as dropping region) of the melt is formed below the injection section 2.
  • the drop area is the area through which the molten material injected into the container 1 through the injection part 2 passes first.
  • the molten material falling and supplied from the injection portion 2 can flow at a predetermined speed along the bottom with a relatively high energy after colliding with the bottom of the container 1. Thereafter, as the melt moves away from the drop region, the melt gradually decreases in speed, and the melt can flow at a normal flow rate with relatively low energy.
  • the drop area is formed on the bottom of the container 1 and its center c is aligned in the vertical direction on the vertical axis (not shown) passing through the center of the injection part 2.
  • the size of the drop area for example, the width in one direction, is proportional to the size of the inner diameter of the injection part 2.
  • the size of the dropping area is also increased in proportion to the inner diameter of the injection part 2.
  • the inner diameter of the injection section 2 is an inner diameter with respect to the opening of the lower end of the injection section 2 and one direction is a direction extending from the injection section 2 to the discharge port 1c Direction.
  • the distance between the edge of the falling area in the one direction and the center c may be 2.5 to 5 times the inner diameter d of the injection part 2.
  • the melt can actively flow at a predetermined speed.
  • the melt in the drop zone has a significant speed.
  • a meaningful velocity of the melt means that the melt has a velocity enough to form an ascending flow instead of descending after colliding with the dam (3).
  • the melt flow in the drop zone can affect the formation of the total melt flow in the vessel 1, and in this respect the drop zone is a significant region.
  • the drop area is also referred to as a drip portion.
  • the container (1) is provided with a melt receiving space therein, a melt injection portion (2) is disposed on one side, and a melt discharge port (1c) is formed on the other side.
  • the container 1 may comprise, for example, a tundish.
  • the turn-off time may be a rectangular turn-off time that is elongated in one direction.
  • the container 1 has a rectangular bottom extending in one direction and a second direction crossing the first direction, two longitudinal side walls 1d and 1d extending in one direction along both long sides of the rim of the bottom, And a width direction side wall 1a and a width direction other side wall 1b, each extending in the other direction along both short sides of the rim of the floor and projecting in the vertical direction.
  • the injection section 2 is arranged close to the one side wall 1a relatively in the width direction and the outlet port 1c is formed in the vicinity of the other side wall 1b relatively.
  • the bottom of the container 1 may have a stepped shape in which the height at the other side is lower than the height at one side.
  • the melt receiving space is formed by the bottom, longitudinal side walls 1d, one side wall 1a in the width direction and the other side wall 1b in the width direction.
  • the longitudinally opposite side walls 1d are opposed to each other in the other direction, and the one widthwise side wall 1a and the other widthwise other side wall 1b are opposed to each other in one direction.
  • the injection unit 2 is disposed on one side of the bottom and the injection unit 2 can be disposed on the upper part of the container 1 in the vertical direction at one side of the bottom.
  • the discharge port 1c may be formed through the other side of the bottom in the vertical direction.
  • a discharge nozzle such as an immersion nozzle is provided through the discharge port 1c from the lower side of the container 1, and a mold (not shown) is disposed by surrounding the lower portion of the immersion nozzle.
  • the discharge port 1c is opened by a slide gate (not shown), and the melt can be discharged to the mold.
  • the mold can solidify the melt into a cast.
  • the cooling stand can perform a series of molding operations by cooling and pressing the casting continuously drawn in the casting mold.
  • the slab having passed through the cooling zone can be cut at a cut (not shown), transferred to a rolling facility, or transported to various post-processing facilities depending on the application.
  • the container 1 has a function of controlling and distributing the amount of melts supplied to the mold (not shown), a function of reducing the pressure due to the load of the melt, for example, a static pressure of iron, and a flow control of the melt, Function.
  • the dam 4 is installed on the bottom of the container 1 for removing the inclusions.
  • the dam 4 controls the flow of the melt to increase the residence time of the melt, thereby floating the slag and the inclusions contained in the melt to the upper surface of the melt, for example, a bath surface. As slag and inclusions floating on the upper surface of the melt are separated from the melt, incorporation of inclusions and slag into the molds can be minimized.
  • the dam 3 is positioned between the injection part 2 and the discharge port 1c so that one side faces the injection part 2 directly and is installed on the bottom of the container 1 and extends in the other direction, (1d).
  • the dam 3 can be supplied from the injection part 2 to the vessel 1 to raise the flow of the melt flowing along the bottom to the upper part of the vessel 1.
  • One surface of the dam 3 is a surface facing one side surface 1a in the width direction and the injection portion 2 among the both sides of the dam 3 extending in the width direction and the vertical direction.
  • the other surface of the dam 3 is a surface facing the other side wall 1b in the width direction and the discharge port 1c on both sides of the dam 3 described above.
  • one surface of the dam 3 is referred to as the front surface, and the other surface of the dam 3 is referred to as the back surface.
  • the separate structure may include various walls including a weir and an auxiliary dam, a container such as an impact pad, and various structures having various other shapes.
  • the dam 3 since no separate structure is provided between the dam 3 and the injection unit 2, one side of the dam 3 can directly face the injection unit 2. Since the dam 3 is installed directly facing the injection part 2, the molten material supplied to the dropping area can be directly affected by the dam 3 without interruption and the flow can be controlled. That is, the molten material first collides with the dam 3 after the molten material falls on the floor, and an upward flow can be formed.
  • the dam 3 can be installed in the drop region to effectively induce the ascending flow of the melt.
  • the dam 3 is provided in the edge portion of the falling region in the other direction so as to face the molten material in the falling region.
  • the dam 3 can first make contact with the melt flowing along the bottom of the container 1 in the direction from one side of the container 1 to the other side in this installed position. That is, the dam 3 is directly exposed to the melt in the falling region at the edge portion of the falling region, and can directly contact the melt.
  • direct contact means that the melt first comes into contact with a separate structure, and the melt and the dam 3 are in contact with each other in advance before the flow is controlled.
  • the melt in the drop zone can only make contact with the dam 3 except for the bottom and side walls of the container 1.
  • the other surface of the dam 3 can directly face the lateral side wall 1b on the side of the discharge port 1c. That is, no separate structure is provided between the dam 3 and the discharge port 1c. In this way, only one dam 3 is provided inside the vessel 1, and the flow of the melt can be controlled by one dam 3.
  • the distance between one side of the dam 3 and the injection part 2 may be proportional to the size of the drop area. As the size of the drop area increases, the distance L between the one side of the dam 3 and the injection part 2 can be distant. At this time, the distance between one surface of the dam 3 and the injection part 2 may be set to be 2.5 to 5 times the inner diameter d of the injection part. Thus, at least one surface of the dam 3 may be located at the edge of the falling area.
  • the dam 3 may have an upper surface located on the top of the melt.
  • the height H of the upper surface of the dam 3 can be formed in the range of 0.5 to 0.75 times the height of the melt surface of the molten material with respect to the bottom of the vicinity of one side of the container 1.
  • the height of the upper surface of the dam 3 is less than 0.5 times the height of the melt surface of the melt, a smooth upward flow can not be formed and the melt is hard to rise to a wide area to the melt surface.
  • the height of the top surface of the dam 3 is more than 0.75 times the height of the melt surface of the molten material.
  • the molten metal rises above the current hot water level and overflows and can flow over the outside of the container 1.
  • the melt processing apparatus described above is referred to as a melt processing apparatus according to the first embodiment.
  • a melt processing apparatus according to a second embodiment of the present invention will be described.
  • the melt processing apparatus according to the second embodiment of the present invention further includes a through hole (not shown) formed in the dam 3, including the above-described configurations of the melt processing apparatus according to the first embodiment.
  • the through-hole is formed in the lower part of the dam 3 and is formed in a direction from one side of the container 1 to the other side, and the inner wall can be directly connected to the bottom of the container 1.
  • the dam 3 is provided in the container 1, and the mounting position is set as the falling area edge portion, and the upper surface is positioned on the upper side of the molten material.
  • the melt processing apparatus can reduce the stagnation region of the melt to improve the inclusion removal capability and distribute the upward flow reaching the upper surface of the melt, do.
  • FIG. 1 is a view for explaining a modeling structure for evaluating a flow of a melt processing apparatus according to an embodiment of the present invention and comparative examples.
  • FIG. FIG. 2 is a view showing a result of flow evaluation of a melt processing apparatus according to an embodiment of the present invention and comparative examples.
  • 3 is a graph showing quantitative values of the flow characteristics of the melt derived from the flow evaluation results in accordance with embodiments of the present invention and comparative examples.
  • the apparatus for processing a melt according to embodiments of the present invention is an apparatus for minimizing inclusions in melts according to the shape and design value of a dam in a continuous casting process. And the shape and the design value of the inner shape of the container 1, such as the dam 3, are designed to be an optimum profile.
  • FIG. 1 (a) is a modeling structure of a melt processing apparatus according to the first embodiment of the present invention.
  • the height of the upper surface of the dam 3 may be 600 mm, for example, 2/3 of the height of the molten metal bath surface.
  • Fig. 1 (b) is a modeling structure of the melt processing apparatus according to the first comparative example, in which the integral structure is not provided in the container 1. Fig.
  • (c) is a modeling structure of a melt processing apparatus according to a second comparative example in which the impact pad 4 is provided right under the injection section 2
  • (d) is a modeling structure in which the height of the upper surface is 40 mm 3 is a modeling structure of a melt processing apparatus according to a third comparative example in which a dam 5 is provided and a dam having a through-hole is provided behind the dam.
  • the dam having the through-hole is not installed so as to directly face the injection part 2.
  • the height of the top surface of the dam having the through-hole is 450 mm, which is 1/2 of the height of the molten metal bath surface, and the mounting position is the outside of the drop area.
  • a dam having a through-hole hereinafter referred to as 3 ', is distinguished from the dam 3 of the first embodiment.
  • Fig. 1 (e) is a modeling structure of the melt processing apparatus according to the fourth comparative example of the present invention, in which only the auxiliary dam 5 is installed in the falling area.
  • Fig. 1 (f) is a modeling structure of a melt processing apparatus according to a fifth comparative example of the present invention.
  • Fig. 1 (f) is a modeling structure of the melt processing apparatus according to the fifth comparative example of the present invention, An auxiliary dam (5) is installed at a position with a distance of 1500 mm. Meanwhile, in the modeling structures of FIG. 1, the inner diameter of the inlet was 160 mm.
  • the structure of the dam 3 of the melt processing apparatus is an optimized profile for the purpose of increasing the plug volume and reducing the dead volume in the melt, The ability to remove inclusions in the melt can be assessed through a graph.
  • FIG. 3 shows quantitative values for analyzing the flow characteristics of the melt through the residence time distribution curve graph for the modeling shapes of the embodiment and comparative examples shown in FIG.
  • a retention time distribution curve is constructed by forming a continuous casting facility for a number model test, then injecting a predetermined amount of a test solution (dye) into the injection section for 2 to 3 seconds while conducting a water model test of a continuous casting process, And the results are shown graphically on the dimensionless time axis.
  • the residence time distribution curve is a standard concentration graph according to the dimensionless time measured at the exit when the dye is introduced into the inlet side of the flow.
  • this curve can be derived using numerical analysis as well as numerical model experiments.
  • the residence time distribution curve can be used to judge, for example, the capacity of the tundish and the degree of mixing of the molten steel due to the change of the internal shape and the effect of the inclusion separation float.
  • the minimum time in the figure is the time at which the concentration of the test solution was first detected. Peak time is the time when the concentration of the test solution is highest.
  • the mean time is a value obtained by dividing the internal volume of the container 1 by the melt injection flow rate at the injection section 2. The molten material injection flow rate is the same for both the embodiment and the comparative example, but the content of the container 1 is different depending on the internal profile of the container 1.
  • Active mean residence time is the area of the curve when the dimensionless value of the measured average time is 2 or more divided by the average residence time.
  • the active region fraction or the active volume fraction is a fraction of the region where the molten steel is mixed, and includes a plug volume fraction and a mixed volume fraction.
  • the stagnation area fraction or stagnation volume fraction is the fraction of the area in which the melt flows very slowly, twice the average residence time of the melt in the vessel.
  • the molten steel volume in the tundish is divided into an active volume and a dead volume.
  • the active volume is an area in which molten steel is mixed
  • the dead volume is an area in which no mixing occurs.
  • the active volume is divided into a plug volume and a mixed volume.
  • the volume of the plug flows through the pipe at the same flow rate of molten steel, and no interlayer mixing occurs.
  • the mixed volume is the area where the mixing is maximized and is the area where mechanical stirring occurs.
  • the dead volume also known as the stagnation area, is a fluid area that moves very slowly in the vessel and stays for twice the average residence time.
  • Vp in the drawing refers to the plug volume fraction
  • Vd refers to the stagnation area fraction
  • Vm refers to the mixed volume fraction.
  • the peak time is related to the plug volume, which is the largest value in the embodiment.
  • the case of Example 1 is the best result.
  • the percentage of stagnation regions shows that Examples 1 and 2 are less than 10%. All the other comparative examples can be seen to exceed 10%.
  • the reduction in stagnation region is effective at 4.7% to 5.8%. This is an effect of removing inclusions in the range of 41% to 50% in terms of the ability to remove inclusions.
  • the fraction of the plug volume should be high and the fraction of the stagnation region should be low, and Example 1 and Comparative Example 2 show the best results.
  • FIG. 4 is a view for explaining a modeling structure for evaluating the flow of a melt processing apparatus according to embodiments and comparative examples of the present invention.
  • 5 is a graph showing quantitative values of flow characteristics of a melt derived from flow evaluation results according to embodiments of the present invention and comparative examples.
  • FIG. 6 is a view showing results of flow evaluation according to embodiments of the present invention.
  • the design of the upper surface of the dam 3 according to the embodiment of the present invention is further evaluated by changing the installation position, the number, and the through hole.
  • P1 is a position where the dam 3 is installed according to Embodiment 1
  • P2 is a position spaced rearwardly by a distance L from P1
  • P3 is a position spaced rearwardly by a distance 2L from P1.
  • L was set to 500 mm and the flow was evaluated.
  • P1 + P2 of Comparative Examples 10 and 11 means that the dam 3 is installed at the P1 and P2 positions. The others also indicate the installation location.
  • the presence or absence of a hole means whether or not a through hole is formed.
  • FIG. 6A is a numerical analysis result of the internal flow of the container 1 according to the first embodiment of FIG. 5, and FIG. 6B is a numerical analysis result of the internal flow of the container 1 according to the second embodiment.
  • the values in the first and second embodiments have very small values. That is, it can be seen that the dam is constructed as in the first embodiment, but the inclusion removal performance is improved by providing the through-hole.
  • the comparative examples 6 to 17 it can be confirmed that installing the dams farther away or installing more than the falling area adversely affects the inclusion removing ability.
  • the size of the stagnation region can be reduced to about 5%
  • FIGS. 6A and 6B it can be seen that the ascending current can reach the wide area of the tub surface, and it is understood that the inclination can be adequately reduced.
  • the distance between the center c of the fall area and the one side wall 1a in the width direction is determined by the center c of the fall area and the distance between the center 3c of the fall area and the dam 3,
  • the width of the dam 3 in one direction should be within a range of 50 mm to 200 mm.
  • the height of the top surface of the dam 3 should be larger than 1/2 of the height of the molten metal bath surface and smaller than 3/4.
  • the distance between one surface of the dam 3 and the injection part 2 is set to be 2.5 to 5 times the inner diameter of the injection part 2,
  • the height of the top surface can be set in the range of 0.5 to 0.7 times the height of the melt surface of the melt.
  • the melt processing apparatus is applied to a continuous casting process, a casting process is performed by performing a continuous casting process of a plurality of charges, and castings are sampled to inspect the inclusions.
  • the total number of inclusions was reduced by about 40%, and large inclusions larger than 20 ⁇ m were reduced by about 51% from the conventional one.
  • the inclusions having a size of 10 to 15 ⁇ were reduced by 35% compared with the conventional ones, and the inclusions having a size of 15 to 20 ⁇ were reduced by about 40% as compared with the conventional ones, which was also effective in reducing the micro-inclusions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

La présente invention concerne un dispositif de traitement de matériau fondu comprenant : un récipient ayant un espace de réception de matériau fondu formé à l'intérieur de celui-ci, et ayant une partie d'entrée de matériau fondu disposée au niveau d'un premier côté de celui-ci et une sortie de matériau fondu formée sur l'autre côté de celui-ci ; et un barrage, qui est positionné entre la partie d'entrée et la sortie de telle sorte qu'une surface de celui-ci fait directement face à l'entrée, est disposé sur le fond du récipient de façon à être relié aux deux parois latérales dans une direction longitudinale, est disposé dans une zone de dépôt de matériau fondu sur le côté inférieur de la partie d'entrée, et a une surface supérieure positionnée sur la partie supérieure du matériau fondu. Le dispositif de traitement de matériau fondu augmente une zone d'arrivée d'un écoulement vers le haut et réduit une zone encombrée du matériau fondu, ce qui permet d'améliorer une capacité d'élimination d'inclusion.
PCT/KR2018/015563 2017-12-11 2018-12-07 Dispositif de traitement de matériau fondu Ceased WO2019117553A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201880079794.1A CN111448012A (zh) 2017-12-11 2018-12-07 熔融材料处理装置
JP2020531030A JP2021505397A (ja) 2017-12-11 2018-12-07 溶融物の処理装置
EP18888361.5A EP3725430A4 (fr) 2017-12-11 2018-12-07 Dispositif de traitement de matériau fondu

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2017-0169476 2017-12-11
KR1020170169476A KR102033642B1 (ko) 2017-12-11 2017-12-11 용융물 처리 장치

Publications (1)

Publication Number Publication Date
WO2019117553A1 true WO2019117553A1 (fr) 2019-06-20

Family

ID=66820492

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/015563 Ceased WO2019117553A1 (fr) 2017-12-11 2018-12-07 Dispositif de traitement de matériau fondu

Country Status (5)

Country Link
EP (1) EP3725430A4 (fr)
JP (1) JP2021505397A (fr)
KR (1) KR102033642B1 (fr)
CN (1) CN111448012A (fr)
WO (1) WO2019117553A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5882577A (en) * 1995-01-26 1999-03-16 Foseco International Limited Tundish
KR19990036374A (ko) * 1995-08-16 1999-05-25 프레트 퀴클러, 폴크마르 쿠르츠 금속 스트립의 주조 장치 및 주조 방법
JPH11170011A (ja) * 1997-12-10 1999-06-29 Nippon Steel Corp 連続鋳造タンディッシュ
KR20140085127A (ko) 2012-12-27 2014-07-07 주식회사 포스코 연속주조용 턴디쉬 및 연속주조장치
KR20140129895A (ko) * 2013-04-30 2014-11-07 현대제철 주식회사 연속주조용 턴디쉬
KR20150022196A (ko) * 2013-08-22 2015-03-04 주식회사 포스코 용탕 처리 장치
KR101602301B1 (ko) 2008-12-02 2016-03-21 포세코 인터내셔널 리미티드 턴디시 충격 패드

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55128356A (en) * 1979-03-26 1980-10-04 Kawasaki Steel Corp Decreasing method for inclusion in molten steel at continuous cast pouring time
JPS63174764A (ja) * 1987-01-12 1988-07-19 Kawasaki Steel Corp 連続鋳造における鋳込み開始時の溶鋼酸化防止方法
JPH1094860A (ja) * 1996-09-25 1998-04-14 Nippon Steel Corp 鋼連続鋳造用タンディッシュ
KR100379604B1 (ko) * 1996-12-26 2003-07-10 주식회사 포스코 연주공정의래들-턴디시간편심주입시청정강제조를보장하는턴디시구조
JP3563222B2 (ja) * 1997-01-31 2004-09-08 日本冶金工業株式会社 鋼の連続鋳造用タンディッシュ
US6074600A (en) * 1999-05-26 2000-06-13 Armco Inc. Modification of tundish dam to minimize turbulence
KR20030044589A (ko) * 2001-11-30 2003-06-09 주식회사 포스코 용강 흐름 유도용 턴디쉬 댐
US7611666B2 (en) * 2008-02-07 2009-11-03 North American Refractories Company Tundish dry vibratable form
KR101322395B1 (ko) * 2011-10-31 2013-10-29 주식회사 포스코 턴디쉬
CN103567423A (zh) * 2012-07-28 2014-02-12 泰州市旺鑫耐火材料有限公司 中间包的挡渣墙
CN202701364U (zh) * 2012-08-23 2013-01-30 北京科技大学 一种长水口连铸中间包
CN103990787B (zh) * 2014-05-16 2016-07-06 莱芜钢铁集团有限公司 一种用于去除连铸中间包内钢液夹杂物的装置及方法
JP6428307B2 (ja) * 2015-01-27 2018-11-28 新日鐵住金株式会社 高清浄鋼の製造方法
KR102461605B1 (ko) * 2015-08-17 2022-11-02 닛테츠 닛신 세이코 가부시키가이샤 환상 둑

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5882577A (en) * 1995-01-26 1999-03-16 Foseco International Limited Tundish
KR19990036374A (ko) * 1995-08-16 1999-05-25 프레트 퀴클러, 폴크마르 쿠르츠 금속 스트립의 주조 장치 및 주조 방법
JPH11170011A (ja) * 1997-12-10 1999-06-29 Nippon Steel Corp 連続鋳造タンディッシュ
KR101602301B1 (ko) 2008-12-02 2016-03-21 포세코 인터내셔널 리미티드 턴디시 충격 패드
KR20140085127A (ko) 2012-12-27 2014-07-07 주식회사 포스코 연속주조용 턴디쉬 및 연속주조장치
KR20140129895A (ko) * 2013-04-30 2014-11-07 현대제철 주식회사 연속주조용 턴디쉬
KR20150022196A (ko) * 2013-08-22 2015-03-04 주식회사 포스코 용탕 처리 장치

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3725430A4 *

Also Published As

Publication number Publication date
EP3725430A1 (fr) 2020-10-21
KR102033642B1 (ko) 2019-11-08
KR20190069093A (ko) 2019-06-19
JP2021505397A (ja) 2021-02-18
CN111448012A (zh) 2020-07-24
EP3725430A4 (fr) 2020-12-30

Similar Documents

Publication Publication Date Title
RU2551742C2 (ru) Разливочный стакан и включающий его сборочный узел
CN104364032B (zh) 高洁净度钢铸片的制造方法以及中间包
US4949778A (en) Immersion nozzle for continuous casting
JP5516235B2 (ja) 連続鋳造による高清浄度鋼鋳片の製造方法
WO2019117553A1 (fr) Dispositif de traitement de matériau fondu
CN107774971A (zh) 一种借助电磁装置控制金属液流动的连铸中间包
KR20090123228A (ko) 턴디쉬
JP5751078B2 (ja) 連続鋳造による高清浄度鋼鋳片の製造方法
JP4714539B2 (ja) 連続鋳造用タンディッシュ
TWI450776B (zh) 餵槽衝擊墊、衝擊墊組件以及餵槽總成
JP5794969B2 (ja) 連続鋳造方法
JP4998705B2 (ja) 鋼の連続鋳造方法
KR20100035821A (ko) 턴디쉬
KR100779687B1 (ko) 연속주조설비에 사용되는 완충 패드가 부착된 턴디쉬
JP6672549B2 (ja) 連続鋳造用タンディッシュ、及びそのタンディッシュを用いた連続鋳造方法
WO2018088753A1 (fr) Équipement de coulée et procédé de coulée l'utilisant
JPH04238658A (ja) 連続鋳造用浸漬ノズル
JP5025312B2 (ja) 湯道に旋回流を発生させて鋼塊表面肌を改善する下注造塊用鋳型への注湯方法
KR101981455B1 (ko) 용융물 처리 장치
JP5850776B2 (ja) 連続鋳造用タンディッシュ
KR101615020B1 (ko) 연주 턴디쉬
KR950005279Y1 (ko) 유동제어 가능한 소형턴디쉬
KR20040046774A (ko) 연속주조용 침지노즐
JP5009033B2 (ja) 鋼の連続鋳造方法および連続鋳造装置
JPH10328794A (ja) 連続鋳造用タンディッシュにおける介在物除去方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18888361

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2020531030

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018888361

Country of ref document: EP

Effective date: 20200713