CN103781572A - Continuous casting device for steel - Google Patents
Continuous casting device for steel Download PDFInfo
- Publication number
- CN103781572A CN103781572A CN201180073324.2A CN201180073324A CN103781572A CN 103781572 A CN103781572 A CN 103781572A CN 201180073324 A CN201180073324 A CN 201180073324A CN 103781572 A CN103781572 A CN 103781572A
- Authority
- CN
- China
- Prior art keywords
- mold
- bend
- long limit
- molten steel
- mixing apparatus
- 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.)
- Granted
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
- 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
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
This continuous casting device for steel is provided with a mold for molten steel casting, which is provided with a pair of long side walls and a pair of short side walls, a submerged nozzle that discharges molten steel within this mold, and electromagnetic stirring devices, which are disposed along the outside surfaces of each of the long side walls and which stir the upper part of the molten steel that is within the mold. In a plane view of the long side walls, curved parts that are curved convexly toward the electromagnetic stirring devices are formed at least in positions facing the nozzle, and the long side walls have a uniform thickness, inclusive of the curved parts. When the inside surface of a curved part is viewed in a plane view, the shortest horizontal distance between the apex, which is the deepest recessed position, and the outer peripheral surface of the submerged nozzle is 30-80 mm in a range from the lower end part of the electromagnetic stirring devices up to a position 50 mm higher than the upper end part of the electromagnetic stirring devices when viewed along the perpendicular direction.
Description
Technical field
The present invention relates to the continuous casting apparatus of the steel of supplying with molten steel manufacture slab in mold.
Background technology
In the continuous casting of steel, in order to improve the surface texture of slab, carry out following work all the time: the electromagnetic mixing apparatus that utilization has near the solenoid top that is arranged on mold, carries out electromagnetic agitation to the molten steel in this mold.
For this electromagnetic agitation, for example, dispose electromagnetic mixing apparatus along a pair of long limit wall that forms mold.And, while discharging molten steel in from dipping spray nozzle to mold, supply with electric current to electromagnetic mixing apparatus, the top of the molten steel in mold is divided and given thrust.By this thrust, molten steel is stirred in horizontal plane, forms the rotating flow of this molten steel.By this rotating flow, near field trash, the bubble etc. of meniscus that has suppressed mold internal upper part is formed on the solidified shell seizure of the side in mold.
But, because dipping spray nozzle in mold is impregnated, so region becomes narrower than other region between long limit wall and dipping spray nozzle.Therefore,, in the region between Chang Bianbi and dipping spray nozzle, compared with its region in addition, molten steel is difficult to flow.
In addition, easily adhere to around the dipping spray nozzle in mold and pile up field trash etc.The attachment of piling up like this, also has its thickness to reach the situation of tens of mm.Therefore, grow region between limit wall and dipping spray nozzle narrower than other position.So the stream of described rotating flow narrows partly, in the region between Chang Bianbi and dipping spray nozzle, molten steel becomes and is difficult to flow.
Therefore, following proposal was once proposed: use described electromagnetic mixing apparatus, and, replace the mold of the parallel type that stove medial surface is smooth and use as shown in Figure 7, in long limit wall 101,102 with dipping spray nozzle 103 with respect to face 104,105 become protruding what is called abnormity mold (patent documentation 1) towards each electromagnetic mixing apparatus 106,107 lateral bends.Moreover in this Fig. 7, being configured between long limit wall 101,102 and electromagnetic mixing apparatus 106,107 is the backboard 108,109 that is provided with the stainless steel of the stream (not shown) of the cooling water of cooling long limit wall 101,102.
According to above-mentioned special-shaped mold, in long limit wall 101,102 with dipping spray nozzle 103 with respect to face 104,105 become protruding to electromagnetic mixing apparatus 106,107 lateral bends respectively, so dipping spray nozzle 103 is longer than parallel mold in the past with the shortest horizontal range between long limit wall 101,102, correspondingly can guarantee significantly the stream of rotating flow 110,111, molten steel becomes easily and flows.
Formerly technical literature
Patent documentation
Patent documentation 1: the JP 2008-183597 of Japan communique
Summary of the invention
But, in described prior art, in order to make the face relative with dipping spray nozzle 103 104,105 in long limit wall 101,102 bend to concavity, and the central portion of long limit made of copper wall 101,102 is cut.Therefore, the thickness of long limit wall 101,102, in bending the part of face 104,105 become as thin as a wafer.Usually, the electromagnetic field being produced by electromagnetic mixing apparatus 106,107 is AC magnetic field, and therefore, decay in magnetic field in conductor.Therefore, in these bendings the part of face 104,105 in, compared with other part of linearity, the decay in magnetic field is less, so electromagnetic force grow, the flow velocity of the stirring stream in the region between bending face 104,105 and dipping spray nozzle 103 becomes faster than other region.Its result, the flow velocity that stirs stream 110,111 becomes inhomogeneous partly, there is mobile disorder and/or stagnant areas in existence meeting, and field trash, bubble etc. are easily solidified the problem that shell catches in the region 112,113 in the downstream of the stirring stream 110,111 at Chang Bianbi 101,102 places.Therefore, can not get the raising of the steel quality of the degree of expecting.
And the inventor investigates rear known, thereby when being only when forming as described above bending simply face 104,105 and making to stir stream 110,111 and easily flow, can not suppressing field trash and be grown the solidified shell of limit wall 101,102 and catch., distinguish the following fact: although if the face 104 that increases bending, 105 and dipping spray nozzle 103 between horizontal range can suppress the seizure of bubble, but in bending face 104, in 105 part, electromagnetic force is grow still, in bending face 104, 105 and dipping spray nozzle 103 between the flow velocity of the mobile stirring in region stream, the flow velocity of the stirring stream more mobile than the region at other is fast, so stirring stream 110, the region 112 in 111 downstream, in 113, there is mobile disorder and/or stagnant areas, can not solve field trash and easily be solidified the problem that shell catches.
The present invention is the invention of making in view of this, its object is, in the continuous casting apparatus of steel with electromagnetic mixing apparatus, even special-shaped mold, by making the flow velocity of molten steel on the top in mold even, and, make the horizontal range between the face and the dipping spray nozzle that bend to concavity in mold suitable, also improve the quality of the slab of casting.
In order to realize described object, the present invention adopts following scheme.
(1), the continuous casting apparatus of the steel that a mode of the present invention relates to, it possesses: the mold with the molten steel casting use of a pair of long limit wall and pair of short edges wall, to the dipping spray nozzle of discharging molten steel in this mold, with the each lateral surface configuration along described each long limit wall, the electromagnetic mixing apparatus that the top of the described molten steel in described mold is stirred, at described each long limit wall, at least the position relative with described dipping spray nozzle is formed with in the situation of overlooking and bends to protruding bend towards described electromagnetic mixing apparatus, and described each long limit wall has the same thickness including described each bend, obtaining the darkest position in the situation lower recess of medial surface of overlooking described bend is the shortest horizontal range between top and the outer peripheral face of described dipping spray nozzle, in the situation that observing along vertical, in the scope of the position of the high 50mm in upper end than described electromagnetic mixing apparatus, be more than 30mm and below 80mm from the bottom of described electromagnetic mixing apparatus.
(2) in the mode of above-mentioned (1), also can adopt following formation: the electro-magnetic braking device that also possesses the below that is configured in described each electromagnetic mixing apparatus, this electro-magnetic braking device gives D.C. magnetic field on the mold thickness direction along described each minor face wall, and described D.C. magnetic field has the same magnetic flux distribution in the situation that overlooking on the mold width along described each long limit wall.
In addition, in the mode of above-mentioned (1), more preferably: the shortest described horizontal range, in the situation that observing along vertical, in the scope of the position of the high 50mm in upper end than described electromagnetic mixing apparatus, be more than 50mm and below 75mm from the bottom of described electromagnetic mixing apparatus.
The mode of recording according to above-mentioned (1), each long limit wall, at least with described dipping spray nozzle with respect to position have towards described electromagnetic mixing apparatus lateral bend and become protruding bend, and thereby each long limit wall has the same thickness formation including this bend, so electromagnetic force being produced by electromagnetic mixing apparatus, in bend and part in addition thereof, be all the same, its result, can make to stir the flow velocity flowing even., the intensity distributions of the described electromagnetic force in the situation that overlooking each long limit wall, becomes identical in the part beyond bend and this bend, so can prevent the situation that in the past such position electromagnetic force being equivalent to bend strengthens partly.
Therefore, can suppress in the past such mobile disorder and/or the generation of stagnant areas, can suppress bubble etc. and easily be solidified the situation that shell catches.
In addition, the shortest horizontal range between top and the dipping spray nozzle of bend, observing in the short transverse of this continuous casting apparatus, in the position of the bottom from described electromagnetic mixing apparatus to more than being set to 30mm in the scope of the position of the high 50mm in upper end than described electromagnetic mixing apparatus and below 80mm, so in the region between top and the dipping spray nozzle of bend, also can guarantee the smooth and easy of molten steel and flow uniformly.
That is, in the opinion newly obtaining the inventor, if the shortest horizontal range between the top of bend and dipping spray nozzle lower than 30mm, in bending area, molten steel becomes and is difficult to flow, the bubble in molten steel etc. is easily solidified shell and catches.On the other hand, if the shortest described horizontal range exceedes 80mm, in bending area, be difficult to guarantee flowing uniformly of molten steel, in the slow region of the flow velocity of molten steel, the field trash in molten steel is easily solidified shell and catches.
In the present invention, based on such opinion, more than the shortest horizontal range between the top of bend and dipping spray nozzle is set as to 30mm and below 80mm, so in the bending area between top and the dipping spray nozzle of bend, the bubble smooth and easy and that flow, and suppress uniformly in molten steel that can guarantee the stirring stream of molten steel is solidified shell seizure.
In addition, like that the shortest horizontal range between the top of bend and dipping spray nozzle is set in to the scope of the short transverse of 30mm～80mm, for the bottom from electromagnetic mixing apparatus is to the scope of the position of the high 50mm in upper end than electromagnetic mixing apparatus.This be due to, the part that the electromagnetic force that molten steel is produced by electromagnetic mixing apparatus directly stirs is the part corresponding to upper end with the bottom of electromagnetic mixing apparatus, but in the time of practical operation, meniscus is positioned at the cause of the position higher than the upper end of electromagnetic mixing apparatus sometimes.In addition, in general, be positioned at than high position, the upper end of electromagnetic mixing apparatus at meniscus, it is highly roughly than the position of the high 50mm in upper end of electromagnetic mixing apparatus.Therefore, the scope of the short transverse more than the shortest horizontal range between the top of bend and dipping spray nozzle is set in to 30mm and below 80mm, for the bottom from electromagnetic mixing apparatus is to the position of the high 50mm in upper end than electromagnetic mixing apparatus.
Moreover the same thickness that Chang Bianbi has refers to: except being formed with the part of bolt hole, cooling water groove etc., the electromagnetic field causing because of the variation of thickness is to the error that is changed to permissible range of the penetration degree in molten steel lower than 10% thickness.Be described, in the case of applying the magnetic field of the magnetic flux density with regulation in the lateral mold of Chang Bianbi, in the magnetic field intensity of the induced inside of mold, lose according to the size of the thickness of long limit wall.,, if the varied in thickness of long limit wall, magnetic field changes to the length of penetration in mold.If long limit wall thickening, magnetic field becomes and is difficult to infiltration.Therefore, with the size of described loss together, the magnetic field intensity change in mold, but that the thickness of long limit wall becomes is the same, to make in the case of the horizontal direction of the wall along Chang Bianbi is observed this variation lower than 10%.
In addition, the scope of the short transverse of the same thickness that Chang Bianbi has, from the action effect of electromagnetic mixing apparatus, as long as the bottom from electromagnetic mixing apparatus is to the scope of the position of the high 50mm in upper end than electromagnetic mixing apparatus.
Moreover, about " the same thickness that Chang Bianbi has ", further supplementary notes.In the case of overlooking along the long limit wall of vertical configuration, the relativeness of the thickness of the thickness of the part of bend and this bend adjacent part in addition becomes and is even more important.; for the meaning of " each long limit wall has the same thickness including described each bend " in above-mentioned (1); but the thickness of the part beyond the thickness of the part of bend being designated as to t1, this bend is designated as t2, and meaning t1 is that t2 ± 10% is with interior (0.9 × t2≤t1≤1.1 × t2).Moreover, most preferably t1=t2.
In addition, as recorded above-mentioned (2), in the continuous casting apparatus of this steel, also can and use so-called electro-magnetic braking device and electromagnetic mixing apparatus.; also can further there is electro-magnetic braking device; this electro-magnetic braking device is configured in the below of described each electromagnetic mixing apparatus, gives to have the D.C. magnetic field of the same magnetic flux distribution on the mold thickness direction of the minor face wall along described mold on the mold width of the long limit wall along described mold.
In this situation, the floating of bubble, the field trash the molten steel that promotes to discharge from dipping spray nozzle, bubble, field trash swim in molten steel, can suppress it and remain in the situation that causes quality to reduce in cast slab.Therefore, can further improve the quality of slab.
Moreover, " the same magnetic flux density " in above-mentioned (2) remarked additionally, it means: in the time overlooking mold, in the case of observing along the magnetic flux distribution on the mold width of Chang Bianbi, the deviation of the magnetic flux density in the length dimension of the coiler part of electro-magnetic braking device, in its average out to ± 30%.
As described above, according to the present invention, bubble contained in cast slab etc. can be reduced, its quality can be improved.
Accompanying drawing explanation
Fig. 1 is plane model figure continuous casting apparatus, that near the summary partly of mold forms that represents that an embodiment of the invention relate to.
Fig. 2 is by the longitudinal section in the situation of this continuous casting apparatus of A-A cross-section of Fig. 1.
Fig. 3 is by the longitudinal section in the situation of this continuous casting apparatus of B-B cross-section of Fig. 1.
Fig. 4 is the stereogram of the long limit wall of this continuous casting apparatus.
Fig. 5 is the figure suitable with Fig. 3, is the longitudinal section of the size around the mold for representing this continuous casting apparatus.
Fig. 6 is the figure that represents the variation of this continuous casting apparatus, is to have longitudinal section in the situation of bend of other shape, suitable with Fig. 2.
The plane model figure of Fig. 7 for representing that near the summary of part existing continuous casting apparatus, mold forms.
The specific embodiment
Embodiments of the present invention are below described.Fig. 1 be overlook and pattern represent near the key diagram of the formation mold of continuous casting apparatus 1 of the steel that present embodiment relates to, Fig. 2 be same pattern represent the key diagram in positive cross section, Fig. 3 be same pattern represent the key diagram in the cross section of side.
And, dispose respectively electromagnetic mixing apparatus 7a, the 7b with solenoid in the outside of backboard 5a, 5b.And, under electromagnetic mixing apparatus 7a, 7b, dispose electro-magnetic braking device 8a, 8b.That is, dispose electromagnetic mixing apparatus 7a and electro-magnetic braking device 8a in the outside of backboard 5a, and electro-magnetic braking device 8a be configured in electromagnetic mixing apparatus 7a under.In addition, dispose electromagnetic mixing apparatus 7b and electro-magnetic braking device 8b in the outside of backboard 5b, and electro-magnetic braking device 8b be configured in electromagnetic mixing apparatus 7b under.
In present embodiment, the length (cast thickness) of overlooking in the situation of minor face wall 4a, 4b is for example 50mm～300mm left and right.This length decides according to desired slab width, if thin width slab is 50mm～80mm left and right, if in thick width slab be 80mm～150mm left and right, if the slab of bandpass is about 150mm～300mm.Moreover, the horizontal direction along Chang Bianbi 3a, 3b (directions X in Fig. 1～Fig. 3) is called to mold width, the horizontal direction along minor face wall 4a, 4b (Y-direction in Fig. 1, Fig. 3) is called to mold thickness direction.
The central portion of the each medial surface in the situation that overlooking Chang Bianbi 3a, 3b, is formed with towards electromagnetic mixing apparatus 7a, 7b lateral bend and becomes protruding bend 11a, 11b.Each bend 11a, 11b are formed on the position relative with being located at dipping spray nozzle 21 in mold 2 described later.About the thickness distribution of overlooking the bearing of trend along them in the situation of Chang Bianbi 3a, 3b, the part of bend 11a, 11b, from the part of its two adjacent linearity do not have different, to there is the mode moulding of the same thickness along horizontal direction.Specifically, for example, by compressing etc., form bend 11a, 11b at Chang Bianbi 3a, 3b.
Say in further detail the medial surface 11a1 of the mode bending that bend 11a is separated from described dipping spray nozzle 21 by the internal face to grow limit wall 3a and forming with the lateral surface 11a2 that grows the mode bending that the outside wall surface of limit wall 3a separates from described dipping spray nozzle 21.The medial surface 11b1 of the mode bending that similarly, bend 11b is separated from described dipping spray nozzle 21 by the internal face to grow limit wall 3b and forming with the lateral surface 11b2 that grows the mode bending that the outside wall surface of limit wall 3b separates from described dipping spray nozzle 21.
Moreover, the same thickness having about long limit wall 3a, 3b further remarks additionally, in the situation that overlooking these long limit wall 3a, 3b, in the case of the thickness of bend 11a, 11b being designated as to t1, the thickness of two adjacent parts beyond this bend 11a, 11b is designated as t2, meaning t1 is that t2 ± 10% is with interior (0.9 × t2≤t1≤1.1 × t2).Moreover, most preferably t1=t2.
In backboard 5a, 5b, its central medial surface has the part that becomes protruding shape towards electromagnetic mixing apparatus 7a, 7b lateral bend, makes the curved shape fit forming with each lateral surface 11a2, the 11b2 of each bend 11a, the 11b of long limit wall 3a, 3b.But the lateral surface of backboard 5a, 5b, is formed as smooth (plane) towards the face of electromagnetic mixing apparatus 7a, 7b side.
Moreover, conventionally, in this backboard, be formed with the cooling water stream for cooling long limit made of copper wall therein, but form this stream in backboard 5a, 5b time, the stream that for example forms channel form by the surface (medial surface) of the side contacting with long limit wall 3a, 3b in backboard 5a, 5b, can easily form cooling water stream.,, by backboard 5a, the 5b of the stream that is formed with channel form at medial surface are overlapped and assembled with the mode of the lateral surface adherence (closely sealed) of long limit wall 3a, 3b with their medial surface, can easily form the stream of channel form.
Each bend 11a, 11b, for example as shown in Figures 2 and 3, from each upper end position of Chang Bianbi 3a, 3b downward, relatively form with dipping spray nozzle 21.Each lower end position of bend 11a, 11b, can be the height identical with the lower end position of dipping spray nozzle 21, or, also can be formed as than the lower end position of dipping spray nozzle 21 on the lower.In space (gap) between bend 11a, 11b and dipping spray nozzle 21, as shown in Figure 1, be formed with respectively bending area 9a, 9b.
Bend 11a, 11b, form along with their lower end of trend, shape that bending part fades away down (part that, forms the depression of bend 11a, 11b shoals and the shape that disappears down gradually).In the present embodiment, also as shown in Figure 4, in the medial surface of for example long limit wall 3a, the boundary line of bend 11a and the flat beyond it, at the parallel linearity of the length direction of the Wei Yuchang limit, office, bottom of bend 11a wall 3a (the horizontal linear SL along directions X in Fig. 4), at the both side edges part place of bend 11a, be the linearity (the straight line VL of extending direction along Z direction in Fig. 4) parallel with the short transverse of long limit wall 3a.
As shown in Figure 5, in situation by bend 11a, 11b with the cross-section of the thickness of slab direction along them, the shortest horizontal range L between their curved top portion (the darkest position of caving in to obtain) and the side face of dipping spray nozzle 21 is: along with the lower end of trend bend 11a, 11b, the taper that disappears thereby the degree of depth of the part of depression shoals gradually, so its length is according to short transverse and difference.In present embodiment, in the position of the each bottom from electromagnetic mixing apparatus 7a, 7b, in than the scope of the position of the high 50mm in upper end of this electromagnetic mixing apparatus 7a, 7b, the shortest described horizontal range L is set to 30mm～80mm.Moreover as this shortest horizontal range L, the 30mm～80mm preferably here stipulating, when more preferably more than 50mm and below 75mm.
; be described with reference to Fig. 5; the shortest horizontal range L between the side face of the curved top portion of bend 11a, 11b and dipping spray nozzle 21; in the scope H of the position of the high 50mm in upper end than electromagnetic mixing apparatus 7a, 7b, be set to 30mm～80mm in the position of the bottom from electromagnetic mixing apparatus 7a, 7b.The length of h in Fig. 5 is 50mm.
For guaranteeing depth D 30mm～80mm, that form the depression of bend 11a, 11b as the shortest horizontal range L between the curved top portion of bend 11a, 11b and the side face of dipping spray nozzle 21, also depend on the thickness of long limit wall 3a, 3b, but can consider the intensity of backboard 5a, 5b, in addition due to electromagnetic mixing apparatus 7a, 7b when position during away from molten steel electromagnetic force die down, so consider this point of thickness that suppresses overall, suitably set the depth D of depression.As the upper limit of the depth D caving in, can be illustrated as below 50mm, can be shown below 40mm by preference.On the other hand, as the lower limit of depth D of depression, more than can being illustrated as 5mm, more than can preference being shown 10mm., more than depth D is preferably 5mm and below 50mm, more preferably more than 10mm and below 40mm.
Described dipping spray nozzle 21, as shown in Figure 3, in the time of casting, its underpart impregnated in the molten steel M in mold 2.Moreover, in this Fig. 3, for the structure in clear and definite continuous casting apparatus 1, omit the hacures of molten steel M.Near the lower end of the side of dipping spray nozzle 21, be formed with two places to the interior tap 22 of tiltedly down discharging molten steel of mold 2.These taps 22 are formed at the relative position separately with each minor face wall 4a, the 4b of mold 2.The bubble that contains the Ar gas being blown into for Washing spray nozzle the discharge currents 23 of discharging from each tap 22, other the field trash etc. of aluminium oxide, slag system etc.These bubbles, field trash float near meniscus 24.Moreover the melted powder 25 with molten oxide is fed on meniscus 24 by not shown feed mechanism.
At the medial surface of mold 2, as shown in Figure 3, be formed with that molten steel M is cooled and the solidified shell 26 that is frozen into.
Be configured in electro-magnetic braking device 8a, the 8b below separately, that formed by electromagnet etc. of electromagnetic mixing apparatus 7a, 7b, can be to the discharge currents 23 of firm molten steel M from each tap 22 is discharged, on the mold thickness direction (Y-direction in Fig. 1, Fig. 2) of minor face wall 4a, 4b along mold 2, give D.C. magnetic field, described D.C. magnetic field has much the same magnetic flux distribution in mold width (directions X in Fig. 1, Fig. 2) scope of long limit wall 3a, 3b along mold 2.The discharge currents 23 of the molten steel M discharging by this D.C. magnetic field with from each tap 22, there is the induced-current towards mold width (directions X in Fig. 1, Fig. 2), by this induced-current and described D.C. magnetic field, near oppositely relative counter current flow (adverse current) of formation and this discharge currents 23 discharge currents 23.By this counter current flow, can suppress bubble in discharge currents 23, be mingled with part and invade deeper in molten steel M, in addition, can promote these bubbles, be mingled with floating of part, suppress it and be solidified shell 26 and catch.
Moreover, above-mentioned " the same magnetic flux density " remarked additionally, mean: in the time overlooking mold 2, observe in the situation of the magnetic flux distribution on the mold width of Chang Bianbi 3a, 3b, the deviation of the magnetic flux density in the length dimension of the coiler part of electro- magnetic braking device 8a, 8b, in its average out to ± 30%.
The continuous casting apparatus 1 of present embodiment forms as described above.Below, illustrate and use continuous casing this continuous casting apparatus 1, molten steel M.
First, in dipping spray nozzle 21, be blown into Ar gas on one side, on one side from each tap 22 of dipping spray nozzle 21 to the interior discharge molten steel of mold 2 M.Molten steel M oliquely downward discharges, and minor face wall 4a, the 4b from each tap 22 to mold 2 forms discharge currents 23.The bubble that contains Ar gas in these discharge currents 23, other field trash, swim in their molten steel M in mold 2, will rise because of the buoyancy that the difference in specific gravity of they and molten steel M causes soon.
And, also can with discharge molten steel M side by side from dipping spray nozzle 21, make electro- magnetic braking device 8a, 8b action.In the situation that using these electro- magnetic braking devices 8a, 8b, in molten steel M, form the counter current flow reverse with the flow direction of discharge currents 23.Its result, as described above, can suppress bubble in discharge currents 23, other field trash invades in molten steel M, in addition deeper, can suppress its diffusion to the surrounding of dipping spray nozzle 21, it floats near meniscus 24 from taking advantage of described counter current flow near dipping spray nozzle 21.
And, with the action of electro- magnetic braking device 8a, 8b side by side, electromagnetic mixing apparatus 7a, 7b also move, and thus by electromagnetic agitation as described above, electromagnetic force, form and stir stream near the molten steel M meniscus 24 in mold 2.And, taking advantage of above-mentioned counter current flow and floating near the bubble of Ar gas meniscus 24 etc., flow by this stirring and rotate, can not caught by the solidified shell of mold 2 26, the melted powder 25 for example with molten oxide is included in and is removed.
Because the long limit wall 3a at mold 2, each center upper portion position of 3b are formed with bend 11a, 11b, so be formed with bending area 9a, 9b between these bends 11a, 11b and dipping spray nozzle 21.Now, long limit wall 3a, 3b also have same thickness including this bend 11a, 11b, so give the magnetic flux density to the electromagnetic force of molten steel M by described electromagnetic mixing apparatus 7a, 7b, and though be for (1) in bending area 9a, 9b mobile molten steel M, or the molten steel M flowing point-blank in the position beyond bending area 9a, 9b for (2) becomes identical degree mutually.Therefore, can form along the flow direction of molten steel M the stirring stream of uniform flow velocity, so can be suppressed at mobile disorder and/or the stagnant areas of region (with the of the prior art described region 112,113 of Fig. 7 explanation) middle generation in the downstream of the stirring stream at long limit wall 3a, 3b place.Therefore can suppress to cause because of the generation of this stagnant areas, bubble etc. is solidified the situation that shell catches.
Moreover long limit wall 3a, 3b have the same thickness including bend 11a, 11b in its each position, but in the thickness attenuation at the part place corresponding with bend 11a, 11b, correspondingly, there is the inhomogeneous of magnetic flux density in backboard 5a, 5b.But in general the electromagnetic field of electromagnetic agitation is AC magnetic field, so can decay in conductor, especially conductivity is higher, decays fiercer.And this backboard 5a, 5b are the austenite stainless steel systems of nonmagnetic material, so its conductivity is little more than long limit wall 3a made of copper, 3b.Therefore, even the attenuation partly of the thickness of backboard 5a, 5b, its impact does not almost have yet, and in bending area 9a, 9b, in mobile molten steel M, can obtain uniform magnetic flux density yet.
In fact, the inventor utilizes gaussmeter to measure magnetic flux density and investigates, and distinguishes following situation.; in the case of the short transverse along continuous casting apparatus 1 is observed; in the height center of electromagnetic mixing apparatus 7a and the curved top portion of the bend 11a that is 30mm from cup depth D to dipping spray nozzle 21 sides near the place of 10mm; utilize gaussmeter to measure magnetic flux density; can confirm: compared with the magnetic flux density of the part of the linearity beyond the bend 11a of long limit wall 3a, the variation below 10% has also only occurred.; many places measure continuous casting apparatus 1 sustained height place magnetic flux density and they are compared; confirm: the measured value in the above-mentioned place corresponding with bend 11a and be positioned at the measured value at the smooth part place of the both sides of the chest of bend 11a, only have the poor of 10% left and right.
As a reference, can also confirm: as prior art, only form by the long limit of curved concave cutting wall the bend that cup depth D is 30mm, in the situation of the thickness attenuation of this bend, its magnetic flux density is than high 40% left and right of the magnetic flux density at the part place of the linearity of long limit wall.That is, with the structure of the prior art shown in Fig. 7 similarly, the lateral surface of long limit wall is smooth state, only on medial surface, forms the curved concave same with above-described embodiment, instrumentation magnetic flux density is carried out same evaluation.Its results verification to: the measured value in the above-mentioned place corresponding with bend than high 40% left and right of measured value at smooth part place of both sides of the chest that is positioned at bend.Therefore, also can confirm the effect of present embodiment from this point.
Describe with Fig. 5, in the present embodiment, the shortest horizontal range L between the curved top portion of bend 11a, 11b and dipping spray nozzle 21 is set to 30mm～80mm in the bottom from electromagnetic mixing apparatus 7a, 7b in the scope H of the position of the high 50mm in upper end than electromagnetic mixing apparatus 7a, 7b.By this formation, can make the flow velocity of stirring mobile in bending area 9a, 9b stream even, can guarantee the smooth and easy of molten steel M and flow uniformly, so can molten steel M fully be stirred mold 2 is interior.Therefore, put and also can suppress bubble etc. and be solidified shell 26 and catch from this.
And, in the present embodiment, also and used electro- magnetic braking device 8a, 8b, so the floating of field trash of the bubble in molten steel M etc. is promoted, and suppress its peripherad diffusion, can further suppress bubble etc. and be solidified shell 26 and catch.
Moreover, in the present embodiment, bend 11a, 11b are shaped as following shape,, as shown in Figure 2, Figure 4 shows such, along with trend lower end, the bend 11a linearity parallel at the length direction of the Wei Yuchang limit, office, bottom of bend 11a wall 3a with the border of its flat around (Fig. 2, Fig. 44 in the straight line SL along directions X), and, be the shape that becomes the linearity (straight line VL along Z direction in Fig. 2, Fig. 4) parallel with the short transverse of long limit wall 3a in the office, both sides of bend 11a.But, also can adopt other shape as the shape of bend 11a, 11b, can be also for example: as shown in Figure 6, along with trend lower end, the boundary line of bend and the flat beyond it, a bit restraining and that disappear, the so-called bend 11c that hangs upside down bell shape bottom., also can adopt as shown in Figure 6, have at the bend 11c that becomes downward the boundary line of the half-oval shaped that the tip is thin to depending on Chang Bianbi 3a in the situation that.
Below, to using in the situation of continuous casting apparatus of the steel that relates to of embodiments of the invention, remove Ar gas bubble contained in molten steel and the effect of field trash describes.In the time implementing the present embodiment, as the continuous casting apparatus of steel, use the continuous casting apparatus 1 shown in previous Fig. 1～Fig. 3.
Be 1200mm, the formation position of the meniscus 24 in the mold 2 that is 250mm for 900mm, thickness highly at width, settle each upper end position of electromagnetic mixing apparatus 7a, 7b that to make highly as 200mm, thrust be 100mmFe to become the height identical with meniscus position, use configuration to make from meniscus 24 electro-magnetic braking device 8a, the 8b of 500mm depth location performance peakflux density downward.In addition, the dipping spray nozzle 21 of maximum outside diameter 190mm, internal diameter 100mm is inserted into and is become from the meniscus 24 molten steel dipping portion of 400mm depth location downward along vertical, cast.
The continuous casting machine 1 of the present embodiment, has the vertical component effect of bending radius 7.5m, 2.5m.Utilize this continuous casting machine 1, divide casting carbon aluminium-killed steel with casting speed 2m/.As dipping spray nozzle 21, use: the medial surface of the tap 22 of dipping spray nozzle 21 and minor face wall 4a, the 4b in the space in mold 2 is relative and to discharge angle θ (with reference to Fig. 2) be 2 hole nozzles that downward 30 apertures of spending are 70mm.
That the constant thickness that forms long limit wall 3a, 3b is 30mm, the parallel mold of common long limit copper coin, long limit copper coin middle body is pressed, the cup depth D that makes the position of meniscus 24 is 0,5,10,20,30,40,50,55mm, and backboard 5a, 5b are cut.; in the time making long limit wall 3a, 3b; prepare the rectangular copper coin of the thickness equally with 30mm; top central portion to this copper coin carries out compressing; thus, the cup depth D that has made the height and position place of meniscus 24 is respectively 0,5,10,20,30,40,50, seven kinds long limit wall 3a, the 3b of 55mm.Moreover cup depth D is the mold that 0mm means to have nonpitting long limit wall.
On the other hand, in the mode consistent with the shape (the bending degree of depth) of bend 11a, the 11b of these seven kinds long limit wall 3a, 3b, seven kinds of different backboard 5a, 5b of shape (the bending degree of depth) of curved recessed portion have been made.Moreover the thickness of each backboard 5a, 5b is made as 80mm, but at the part place that is formed with curved recessed portion than this thin thickness.
The bubble of slab, inclusion defects, adopt the slab top layer from slab observed and the bubble with diameters more than 100 μ m that counts and the index of field trash number are evaluated to the part of the degree of depth of 50mm.Ar gas bubble number index expression in table 1: the distance L (with reference to Fig. 5) between bend 11a, 11b and dipping spray nozzle 21 for 25m and cup depth D are 0mm, the number of Ar gas bubble do not form bend 11a, 11b on Chang Bianbi 3a, 3b in the situation that is as 1, with respect to it, the ratio of the number of Ar gas bubble under each condition.
In addition, about field trash number index, similarly, represent: be that 25mm and cup depth D are 0mm by the distance L between bend 11a, 11b and dipping spray nozzle 21, the number of the field trash in the situation that of not forming bend 11a, 11b on Chang Bianbi 3a, 3b is as 1, with respect to it, the ratio of the number of field trash under each condition.Moreover the distance L between bend and dipping spray nozzle in table 1 is illustrated in the size at the lower end position place of electromagnetic mixing apparatus 7a, 7b.In addition, cup depth D represents the size at the height and position place at meniscus 24 places as mentioned above.
Moreover, in order to confirm the effect of the inventive example, first will not make electro- magnetic braking device 8a, 8b action, and only make the result of electromagnetic mixing apparatus 7a, 7b action be illustrated in table 1.
Table 1
Distinguish according to the result shown in table 1, in the situation that distance L is 25mm, even cup depth D is made as to 5mm and forms bend 11a, 11b, the situation that is 0mm from cup depth D compare do not have yet different, Ar gas bubble number index and field trash number index are all 1, can not make the number of Ar gas bubble and field trash reduce.
But, in the time that distance L is 30mm, even if cup depth D is more shallow, be 5mm, Ar gas bubble number index is also reduced to 0.6.
In addition we know, in the time that distance L is 80mm, Ar gas bubble number index is 0.2, and in low-level, and field trash number index, also in low-level, is 1.3, but in the time that distance L becomes 85mm, field trash number index is increased to 2.0 by leaps and bounds.
By under the condition identical with embodiment 1, thereby electro- magnetic braking device 8a, 8b action is illustrated in table 2 with the result of electromagnetic mixing apparatus 7a, 7b use below.
Table 2
According to the result shown in table 2, see the tendency same with the situation that does not make electromagnetic braking 8a, 8b action.; in the situation that distance L is 25mm; even cup depth D is made as to 5mm and forms bend 11a, 11b; Ar gas bubble number index and field trash number index are all also 1; the situation that is 0mm from cup depth D compare do not have different, so can not make Ar gas bubble and field trash number reduce.
On the other hand, in the time that distance L is 30mm, even if cup depth D is 5mm, Ar gas bubble number index also reduces by half to 0.5.
And in the time that distance L is 80mm, Ar gas bubble number index is 0.1, further reduction compared with 0.2 shown in table 1.Therefore can confirm: and with electro- magnetic braking device 8a, 8b in the situation that, aspect the removing of Ar gas bubble, produce effect.But known, in the time that distance L becomes 85mm, although Ar gas bubble to remove effect still high, field trash number index is increased to 1.8 tremendously.
In industry, utilize possibility
The present invention is useful supply with molten steel manufacture slab in mold time.
Description of reference numerals
1 continuous casting apparatus
2 molds
The long limit of 3a, 3b wall
4a, 4b minor face wall
5a, 5b, 6a, 6b backboard
7a, 7b electromagnetic mixing apparatus
8a, 8b electro-magnetic braking device
9a, 9b bending area
11a, 11b, 11c bend
21 dipping spray nozzles
22 taps
23 discharge currents
24 meniscus
25 melted powder
26 solidified shell
M molten steel
Claims (2)
1. a continuous casting apparatus for steel, is characterized in that, possesses:
There is the mold of the molten steel casting use of a pair of long limit wall and pair of short edges wall;
To the dipping spray nozzle of discharging molten steel in this mold; With
Along each lateral surface configuration of described each long limit wall, the electromagnetic mixing apparatus that the top of the described molten steel in described mold is stirred,
In position wall, at least relative with described dipping spray nozzle, described each long limit, be formed with in the situation of overlooking and bend to protruding bend towards described electromagnetic mixing apparatus, and described each long limit wall has the same thickness including described each bend,
Obtaining the darkest position in the situation lower recess of medial surface of overlooking described bend is the shortest horizontal range between top and the outer peripheral face of described dipping spray nozzle, in the situation that observing along vertical, in the scope of the position of the high 50mm in upper end than described electromagnetic mixing apparatus, be more than 30mm and below 80mm from the bottom of described electromagnetic mixing apparatus.
2. the continuous casting apparatus of steel according to claim 1, is characterized in that, also possesses the electro-magnetic braking device of the below that is configured in described each electromagnetic mixing apparatus,
This electro-magnetic braking device gives D.C. magnetic field on the mold thickness direction along described each minor face wall, and described D.C. magnetic field has the same magnetic flux distribution in the situation that overlooking on the mold width along described each long limit wall.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/075868 WO2013069121A1 (en) | 2011-11-09 | 2011-11-09 | Continuous casting device for steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103781572A true CN103781572A (en) | 2014-05-07 |
| CN103781572B CN103781572B (en) | 2016-09-07 |
Family
ID=48288713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180073324.2A Active CN103781572B (en) | 2011-11-09 | 2011-11-09 | The continuous casting apparatus of steel |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20140190655A1 (en) |
| EP (1) | EP2754513B1 (en) |
| KR (1) | KR20140053279A (en) |
| CN (1) | CN103781572B (en) |
| BR (1) | BR112014005417B1 (en) |
| CA (1) | CA2844450C (en) |
| ES (1) | ES2695045T3 (en) |
| PL (1) | PL2754513T3 (en) |
| WO (1) | WO2013069121A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500228A (en) * | 2017-02-27 | 2018-09-07 | 宝山钢铁股份有限公司 | FLUID FLOW INSIDE CONTINUOUS SLAB CASTING MOLD control method |
| TWI679072B (en) * | 2017-03-03 | 2019-12-11 | 日商日鐵不鏽鋼股份有限公司 | Continuous casting method and continuous casting device |
| JP2020015083A (en) * | 2018-07-27 | 2020-01-30 | 日本製鉄株式会社 | Flow control apparatus for thin slab continuous casting and continuous casting method for thin slab |
| CN111194247A (en) * | 2018-02-26 | 2020-05-22 | 日本制铁株式会社 | Casting mould equipment |
| CN111676381A (en) * | 2020-06-22 | 2020-09-18 | 江苏江南铁合金有限公司 | Process for stirring alloy liquid |
| CN112236249A (en) * | 2018-06-07 | 2021-01-15 | 日本制铁株式会社 | Continuous casting equipment and continuous casting method used for casting thin slab of steel |
| CN112272593A (en) * | 2018-06-07 | 2021-01-26 | 日本制铁株式会社 | In-mold flow control device and in-mold flow control method in thin slab casting |
| CN115194107A (en) * | 2022-07-13 | 2022-10-18 | 沈阳工程学院 | Multi-segment independently adjustable composite magnetic field device and method for controlling molten metal flow |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6427945B2 (en) * | 2014-05-09 | 2018-11-28 | 新日鐵住金株式会社 | Bloom continuous casting method |
| JP6331757B2 (en) * | 2014-06-25 | 2018-05-30 | 新日鐵住金株式会社 | Equipment for continuous casting of steel |
| EP3221070B1 (en) | 2014-11-20 | 2020-06-03 | ABB Schweiz AG | Electromagnetic brake system and method of controllong molten metal flow in a metal-making process |
| KR20190016613A (en) | 2015-03-31 | 2019-02-18 | 신닛테츠스미킨 카부시키카이샤 | Continuous casting method for steel |
| CN113001848B (en) * | 2021-02-24 | 2022-09-09 | 桂林恒保健康防护有限公司 | Preparation method of medical gloves with uniform thickness |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995026839A1 (en) * | 1994-04-01 | 1995-10-12 | Acutus Industries | Continuous metal casting mold |
| CN1139891A (en) * | 1994-01-28 | 1997-01-08 | 曼内斯曼股份公司 | Continuous casting ingot mould for guiding continuous castings |
| JPH10193067A (en) * | 1996-12-27 | 1998-07-28 | Nkk Corp | Method for continuously casting steel |
| CN1170645C (en) * | 1996-05-13 | 2004-10-13 | Km欧洲钢铁股份有限公司 | Liquid-cooled mould |
| CN102196871A (en) * | 2008-11-04 | 2011-09-21 | 新日本制铁株式会社 | Device for continuously casting steel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4512386A (en) * | 1982-11-12 | 1985-04-23 | Swiss Aluminium Ltd. | Adjustable mold for electromagnetic casting |
| IT1262073B (en) * | 1993-02-16 | 1996-06-19 | Danieli Off Mecc | LINGOTTIERA FOR CONTINUOUS CASTING OF THIN SLABS |
| DE19710791C2 (en) * | 1997-03-17 | 2000-01-20 | Schloemann Siemag Ag | Optimized forms of the continuous casting mold and the immersion nozzle for casting steel slabs |
| DE19741131C2 (en) * | 1997-09-15 | 2001-06-28 | Sms Demag Ag | Continuous casting mold |
| SE523881C2 (en) * | 2001-09-27 | 2004-05-25 | Abb Ab | Device and method of continuous casting |
| EP1468760B1 (en) * | 2003-04-16 | 2005-05-25 | Concast Ag | Tube mould for continuous casting |
| JP5321528B2 (en) * | 2010-04-22 | 2013-10-23 | 新日鐵住金株式会社 | Equipment for continuous casting of steel |
-
2011
- 2011-11-09 US US14/237,757 patent/US20140190655A1/en not_active Abandoned
- 2011-11-09 PL PL11875560T patent/PL2754513T3/en unknown
- 2011-11-09 WO PCT/JP2011/075868 patent/WO2013069121A1/en active Application Filing
- 2011-11-09 CA CA2844450A patent/CA2844450C/en not_active Expired - Fee Related
- 2011-11-09 CN CN201180073324.2A patent/CN103781572B/en active Active
- 2011-11-09 ES ES11875560.2T patent/ES2695045T3/en active Active
- 2011-11-09 BR BR112014005417-7A patent/BR112014005417B1/en active IP Right Grant
- 2011-11-09 EP EP11875560.2A patent/EP2754513B1/en not_active Not-in-force
- 2011-11-09 KR KR1020147005878A patent/KR20140053279A/en active Search and Examination
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1139891A (en) * | 1994-01-28 | 1997-01-08 | 曼内斯曼股份公司 | Continuous casting ingot mould for guiding continuous castings |
| CN1064873C (en) * | 1994-01-28 | 2001-04-25 | 曼内斯曼股份公司 | Continuous casting ingot mould for guiding continuous castings |
| WO1995026839A1 (en) * | 1994-04-01 | 1995-10-12 | Acutus Industries | Continuous metal casting mold |
| CN1170645C (en) * | 1996-05-13 | 2004-10-13 | Km欧洲钢铁股份有限公司 | Liquid-cooled mould |
| JPH10193067A (en) * | 1996-12-27 | 1998-07-28 | Nkk Corp | Method for continuously casting steel |
| CN102196871A (en) * | 2008-11-04 | 2011-09-21 | 新日本制铁株式会社 | Device for continuously casting steel |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500228A (en) * | 2017-02-27 | 2018-09-07 | 宝山钢铁股份有限公司 | FLUID FLOW INSIDE CONTINUOUS SLAB CASTING MOLD control method |
| TWI679072B (en) * | 2017-03-03 | 2019-12-11 | 日商日鐵不鏽鋼股份有限公司 | Continuous casting method and continuous casting device |
| CN111194247A (en) * | 2018-02-26 | 2020-05-22 | 日本制铁株式会社 | Casting mould equipment |
| CN111194247B (en) * | 2018-02-26 | 2021-12-10 | 日本制铁株式会社 | Casting mould equipment |
| CN112236249A (en) * | 2018-06-07 | 2021-01-15 | 日本制铁株式会社 | Continuous casting equipment and continuous casting method used for casting thin slab of steel |
| CN112272593A (en) * | 2018-06-07 | 2021-01-26 | 日本制铁株式会社 | In-mold flow control device and in-mold flow control method in thin slab casting |
| CN112236249B (en) * | 2018-06-07 | 2022-08-02 | 日本制铁株式会社 | Continuous casting equipment and continuous casting method used for casting thin slab of steel |
| JP2020015083A (en) * | 2018-07-27 | 2020-01-30 | 日本製鉄株式会社 | Flow control apparatus for thin slab continuous casting and continuous casting method for thin slab |
| JP7151247B2 (en) | 2018-07-27 | 2022-10-12 | 日本製鉄株式会社 | Flow controller for thin slab continuous casting and thin slab continuous casting method |
| CN111676381A (en) * | 2020-06-22 | 2020-09-18 | 江苏江南铁合金有限公司 | Process for stirring alloy liquid |
| CN115194107A (en) * | 2022-07-13 | 2022-10-18 | 沈阳工程学院 | Multi-segment independently adjustable composite magnetic field device and method for controlling molten metal flow |
| CN115194107B (en) * | 2022-07-13 | 2023-05-16 | 沈阳工程学院 | Multi-stage independent adjustable composite magnetic field device and method for controlling metal liquid flow |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103781572B (en) | 2016-09-07 |
| CA2844450C (en) | 2017-08-15 |
| EP2754513A1 (en) | 2014-07-16 |
| KR20140053279A (en) | 2014-05-07 |
| EP2754513B1 (en) | 2018-10-10 |
| CA2844450A1 (en) | 2013-05-16 |
| BR112014005417B1 (en) | 2019-07-02 |
| ES2695045T3 (en) | 2018-12-28 |
| EP2754513A4 (en) | 2015-06-24 |
| PL2754513T3 (en) | 2019-03-29 |
| BR112014005417A2 (en) | 2017-04-04 |
| WO2013069121A1 (en) | 2013-05-16 |
| US20140190655A1 (en) | 2014-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103781572A (en) | Continuous casting device for steel | |
| US8418749B2 (en) | Continuous casting apparatus for steel | |
| JP5321528B2 (en) | Equipment for continuous casting of steel | |
| US10512970B2 (en) | Method for continuously casting steel | |
| WO2013190799A1 (en) | Method for manufacturing high-purity steel casting, and tundish | |
| US10987730B2 (en) | Continuous casting apparatus and continuous casting method for multilayered slab | |
| JP5073531B2 (en) | Slab continuous casting apparatus and method for continuous casting | |
| EP2092998B1 (en) | Molten metal continuous casting method | |
| EP0445328B1 (en) | Method for continuous casting of steel | |
| TW202003134A (en) | Continuous casting facility and continuous casting method used for thin slab casting | |
| JP5673162B2 (en) | Continuous casting method and continuous casting apparatus | |
| WO2023190017A1 (en) | Immersion nozzle, mold, and steel continuous casting method | |
| JP5549346B2 (en) | Steel continuous casting apparatus and continuous casting method | |
| JP7200722B2 (en) | In-mold flow control method in curved continuous casting equipment | |
| KR20120043332A (en) | Apparatus and method for continous casting using electromagnetic stirring device | |
| JP2006000896A (en) | Continuous casting method | |
| JPWO2013069121A1 (en) | Steel continuous casting equipment | |
| JP4492333B2 (en) | Steel continuous casting method | |
| JP2008221243A (en) | Continuously casting method and apparatus for steel | |
| JP2011218435A (en) | Continuous casting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Tokyo, Japan, Japan Patentee after: Nippon Iron & Steel Corporation Address before: Tokyo, Japan, Japan Patentee before: Nippon Steel Corporation |