CN1272074A - Continuous casting method and casting mold for continuous casting - Google Patents
Continuous casting method and casting mold for continuous casting Download PDFInfo
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- CN1272074A CN1272074A CN 99800847 CN99800847A CN1272074A CN 1272074 A CN1272074 A CN 1272074A CN 99800847 CN99800847 CN 99800847 CN 99800847 A CN99800847 A CN 99800847A CN 1272074 A CN1272074 A CN 1272074A
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- crystallizer
- gap nozzle
- continuous cast
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/07—Lubricating the moulds
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Abstract
A method of continuously casting a metal, comprising improving a rate of cooling a portion between a casting mold and a billet and increasing the thickness of a consolidated shell by controlling a width of an air gap occurring between the casting mold and billet (consolidated shell) due to the consolidation shrinkage and transformation shrinkage of the billet, and improving the productivity of the continuous casting method and the quality of a molded product by increasing a powder supply rate and reducing the bulging and breakout of the billet and the breakage of the surface thereof. A casting mold for the continuous casting of a metal, comprising: 1) slit nozzles (6) for blowing out a high-pressure fluid therefrom in the downward direction, provided on a bottom surface of a lower portion of the casting mold (l) so that the nozzles are arranged in the direction of the whole of a circumferential portion of the bottom surface so as to surround a billet (3), or at least on the bottom surface constituting a rear surface of the casting mold, 2) a recess (l4) formed in an inner surface of the lower portion of the casting mold (l) in such a manner that an outer surface of the billet (3) and the inner surface of the casting mold are put in a completely non-contacting condition, and in such a manner that the recess extends in the direction of the whole of the circumferential portion of the bottom surface so as to surround the billet (3), or at least in the wear surface, and slit nozzles (6) adapted to blow out a high-pressure fluid therefrom and provided on an upper surface (l5) or a side surface (l6) of the recess, or 3) a box (l) provided on the lower portion of the casting mold (l) so as to be joined thereto, and slit nozzles (6) adapted to blow out a high-pressure fluid therefrom and provided on a bottom surface of the box (l7) or on the upper surface (l5) or side surface (l6) of the recess (l4).
Description
Technical field
The present invention relates to cooling or lubricity good metal continuous cast method and casting mold for continuous casting between crystallizer-strand.
Background technology (prior art)
1) designated state comprises the U.S. and Canadian occasion
In the steel continuous cast method that adopts existing fixedly crystallizer, solidifying as shown in Figure 13 of strand carried out.On crystallizer top, the molten steel 2 that contacts with water mold 1 by the covering slag 4 that lubricates usefulness begins to solidify, and is pulled out along casting direction when further solidifying.Usually, in order to prevent the bonding of 3 of crystallizer 1-strands (or solidified shell),, mold oscillation supplies between crystallizer-strand while will being lubricated with covering slag 4.
The solidified shell 3 that constantly solidifies is because solidification shrinkage and δ-γ phase transformation produce contraction and formation air gap 8 between crystallizer-strand.Because the existence of this air gap 8, the basifacial cooling velocity reduces in crystallizer, thereby becomes a factor that hinders solidified shell to grow up.Particularly, thin by the thickness of solidified slab shell in secondary behind the crystallizer when carrying out high-speed casting in order to boost productivity, be easy to bring out bulge and bleed-out.Eliminate fully as the air gap that will be formed at wide of crystallizer and leptoprosopy, then can make, thereby reduce defective and the bleed-out that bulge causes by the solidified shell thickening behind the crystallizer.
As the method for eliminating this air gap, can adopt crystallizer leptoprosopy or wide setting more toward below narrow more tapering method and mechanically push the method etc. of wide or leptoprosopy, but any method all can not be eliminated air gap fully at all steel grades.In addition, particularly in the latter's method, mechanical agency cost height.
In addition, feature of the present invention is toward being blown into gases at high pressure between crystallizer-strand and utilizing attached wall effect described later to form along the casting direction airflow flowing with the control air gap, but this is impossible in existing gas blowing method (spy opens clear 57-124555 communique).Reason is as shown in Figure 14, to form hydrostatic pressing 9 (P+ ρ gh at molten steel 2 along gravity direction; P: static pressure, ρ: density, g: acceleration of gravity, h: the distribution molten steel degree of depth), the gas 5 that is blown into from the high side of hydrostatic pressing 9 towards a low side flow, thereby form opposite with casting direction mobile.That is, the gas 5 that is blown into is owing to making the initial stage solidify the part disorder, so be difficult to obtain stable shaped strand.
Below, attached wall effect is described.The principle that attached wall effect flows at rated condition lower edge wall based on fluid blows out the purpose of angular bend formation along the fluid of wall for making, and is widely used in air-conditioning and gas turbine etc.In order to bring out this attached wall effect, as long as guarantee following condition: 1) blow-off outlet is shaped as two-dimentional gap nozzle, 2) make the blowing outlet on the direction of fluid warpage that arc sections is set in hope, this arc sections has and is at least the arc radius of blow-off outlet thickness more than 3 times, 3) make and blow out angle towards the direction of wishing warpage tilt (list of references: Mitsubishi Heavy Industries Ltd's skill is reported Vol.26, No.3 (1989) p206).
In imbedding walls such as wall type air-conditioning in the design of air-conditioning, in order not worsen heating installation efficient because of attached wall effect generation wall adheres to jet flow, under the condition of not bringing out above-mentioned attached wall effect, it is well-designed so that the adjustment air is blown into indoor (list of references: Mitsubishi Heavy Industries Ltd's skill is reported Vol.26, No.3 (1989) p206).In addition, can use attached wall spiral nozzle as the logical line technology of optical fiber, make the air of supply flow to a peristome of nozzle forcibly, and supply to optical fiber from another peristome, this method also can be utilized above-mentioned attached wall effect (list of references: turbomachinery well, No. the 4th, the 22nd volume, 56, (1994)).
2) designated state does not comprise the U.S. and Canadian occasion
In addition; when high-speed casting; and when using the high-viscosity covering slag of the worry be not involved in covering slag to cast, exist tendency and the covering slag that the covering slag feed speed descends between crystallizer-strand to supply with in width and the uneven tendency of casting direction to the steel grade that the continuous casting covering slag defective becomes problem.In such occasion, insufficient lubrication between crystallizer-strand and inhomogeneous solidifying produce the slab surface crack defective.
As the method that improves the covering slag feed speed, attempted covering slag lowering viscousity, mold oscillation high frequency high-strokeization, covering slag high speed scorification, covering slag eutectic and revealed, but also not have proposition to control the method for covering slag feed speed energetically at wide region.
In addition, the inventor proposed in crystallizer basifacial by gap nozzle be blown into gas along the casting direct of travel towards 3 of crystallizer 1-solidified shells, by the method (Japanese patent gazette spy opens flat 10-291054 number) of jeting effect control air gap, and its validity confirmed, but in the metal of a part of solidified shell weak strength, can show the unstability of gas, so wish to obtain more stable operation.
That is in the method, gas may flow between crystallizer-strand towards the top, the gas flow instability.In addition, in the method, owing to gap nozzle directly contacts the high temperature strand or contacts strand by covering slag, so, the big and gap nozzle generation thermal deformation of the melting loss of gap nozzle.In addition, in the method, covering slag can cause stopping up attached to gap nozzle.
(problem that invention will solve)
1) designated state comprises the U.S. and Canadian occasion
The present invention makes in order to solve such problem, its purpose is to provide a kind of casting mold for continuous casting that is suitable for high-speed casting with cheap price, in this crystallizer, utilizes the air-flow of attached wall effect formation towards casting direction, make crystallizer-strand ask decompression, eliminate air gap.
2) designated state does not comprise the U.S. and Canadian occasion
The present invention makes in order to solve such problem; its purpose is to provide a kind of casting mold for continuous casting with good cooling performance; for this crystallizer; even when high-speed casting and use high-viscosity covering slag; supply between crystallizer-strand also can keep stable and have good lubricity; in the crystallizer bottom, can eliminate the air gap between crystallizer-strand.Disclosure of an invention (means of dealing with problems)
1) designated state does not comprise the U.S. and Canadian occasion
In order to address the above problem, the inventor finds, becomes decompression state between crystallizer-strand by making in the crystallizer bottom, can stably increase the covering slag quantity delivered between crystallizer-strand, and can increase cooling capacity.Reduce pressure in order to make between crystallizer-strand; in the casting mold for continuous casting of metal; all entirely in the crystallizer bottom surface; or the bottom surface of a wide at least side; or make the top or side of the recess that strand and crystallizer be provided with fully non-contiguously; the parallel gap nozzle that is used for blowing out towards the below high-pressure fluid that cuts out of relative strand is set; jeting effect by the high-pressure fluid that blows out from this gap nozzle forms vacuum or reduced pressure zone; improve the covering slag feed speed; and attract strand to make it near the crystallizer inwall; the air gap that elimination forms between crystallizer-strand; improve the heat absorption capacity of crystallizer, thereby do not have skin breakage; the casting of bulge and bleed-out.
In the present invention, gap nozzle does not directly contact strand, and in addition, also obstructed overprotection slag is in direct contact with strand.
Here, high-pressure fluid refers to gases at high pressure (air, nitrogen, inert gas, steam etc.), highly pressurised liquid (water etc.) and high pressure solution-airmixture (air+water droplet), below for convenience, be defined in gases at high pressure and describe.In addition, blow out the occasion that not only refers to vertical below towards the below, and comprise having from vertical below towards the oblique angle of strand inclination so that gases at high pressure impact the occasion of strand.
Specifically, in using the continuous casting of the fixing metal of crystallizer, crystallizer is carried out the processing of following (1) or (2),
(1) crystallizer bottom face or the case bottom surface that is connected to the crystallizer bottom be provided with gases at high pressure below blow out with gap nozzle 6, this gap nozzle 6 surrounds strand 3 with Quan Zhouzhuan and be parallel to casting billet surface ground and be provided with, or be provided with abreast at the relative casting billet surface in the bottom surface of wide 11 side of crystallizer at least, perhaps
(2) in the crystallizer lower inner face or be connected to the inner face of the case of crystallizer bottom, encirclement strand 3 ground are with complete all shapes or wide 11 side recess 14 is set at least, casting billet surface is not contacted fully with crystallizer 1, and on recess 15 or side 16 configured in parallel be set below the gases at high pressure of casting billet surface, blow out with gap nozzle 6, and
(3) form such formation, that is, blow out gases at high pressure towards the below, after in a single day gas jet contacts strand, flow towards the casting direction of advance along casting billet surface by gap nozzle 6.But, make and to add man-hour in the bottom surface of wide side of crystallizer when blowing out the restriction that gases at high pressure stream, crystallizer cooling water produce, also can or be located at above the recess of leptoprosopy side or side in crystallizer leptoprosopy side bottom surface and gases at high pressure are set blow out and use gap nozzle.
That is, continuous cast method of the present invention is as follows:
(1) a kind of metal continuous cast method, it is characterized in that: crystallizer bottom surface in the crystallizer bottom, or on the recess that strand and crystallizer are provided with fully non-contiguously or the side, gap nozzle is set, from this gap nozzle surround strand ground with complete all shapes or at least leniently the face side blow out high-pressure fluid towards the below, thereby reduced pressure in the space that is surrounded by crystallizer, strand and high-pressure fluid.
(2) a kind of metal continuous cast method, it is characterized in that: case is routed to crystallizer in the crystallizer bottom, bottom face at this case, or on the recess that strand and this case are provided with fully non-contiguously or the side, gap nozzle is set, from this gap nozzle surround strand ground with complete all shapes or at least leniently the face side blow out high-pressure fluid towards the below, thereby reduced pressure in the space that is surrounded by case, strand and high-pressure fluid.
(3) as above-mentioned (1) or (2) described metal continuous cast method, it is characterized in that: decompression degree Δ P has such relation, that is, and and 0.01≤Δ P≤0.5 (atm).
(4) as any one described metal continuous cast method in above-mentioned (1)～(3), it is characterized in that: high-pressure fluid is gases at high pressure.
Casting mold for continuous casting of the present invention is as follows:
(5) a kind of metal continuous cast crystallizer is characterized in that: the bottom face of this crystallizer have high-pressure fluid below blow out and use gap nozzle, this gap nozzle surrounds strand ground with complete all shapes or be configured wide side bottom surface at least.
(6) as above-mentioned (5) described metal continuous cast crystallizer, it is characterized in that: below this, blow out with between gap nozzle and this crystallizer inner face crystallizer inwall being set.
(7) as above-mentioned (5) or (6) described metal continuous cast crystallizer, it is characterized in that: the horizontal range X that blows out with gap nozzle to this below from this crystallizer inner face has such relation, that is, and and 0.5 (mm)≤X≤5 (mm).
(8) a kind of metal continuous cast crystallizer, it is characterized in that: case is routed to crystallizer in the crystallizer bottom, the bottom face of this case have high-pressure fluid below blow out and use gap nozzle, this below blows out with gap nozzle and surrounds strand ground with complete all shapes or be configured in the bottom surface of wide side at least.
(9) as above-mentioned (8) described metal continuous cast crystallizer, it is characterized in that: below this, blow out between the inner face with gap nozzle and this case dividing plate is set.
(10) as above-mentioned (8) or (9) described metal continuous cast crystallizer, it is characterized in that: the horizontal range X ' that blows out with gap nozzle to this below from this case inner face has such relation, that is, and and 0.5 (mm)≤X '≤5 (mm).
(11) a kind of metal continuous cast crystallizer, it is characterized in that: in the crystallizer bottom, surround strand ground with complete all shapes or at least wide side, make strand and crystallizer that recess is set fully non-contiguously, on recess, be provided with high-pressure fluid below blow out and use gap nozzle.
(12) as above-mentioned (11) described metal continuous cast crystallizer, it is characterized in that: below this, blow out the crystallizer inwall is set between the inner face with gap nozzle and this crystallizer.
(13) as above-mentioned (11) or (12) described metal continuous cast crystallizer, it is characterized in that: blow out the horizontal range X that uses gap nozzle to this below from this crystallizer inner face
0Have such relation, that is, and 0.5 (mm)≤X
0≤ 5 (mm).
(14) a kind of metal continuous cast crystallizer, it is characterized in that: case is routed to crystallizer in the crystallizer bottom, inner face at this case, surround strand ground with complete all shapes or at least wide side, make strand and crystallizer that recess is set fully non-contiguously, on recess, be provided with high-pressure fluid below blow out and use gap nozzle.
(15) as above-mentioned (14) described metal continuous cast crystallizer, it is characterized in that: below this, blow out between the case inner face with the recess upper face side of gap nozzle and this case dividing plate is set.
(16) as above-mentioned (14) or (15) described metal continuous cast crystallizer, it is characterized in that: blow out horizontal range X to this below with gap nozzle from the case inner face of the recess upper face side of this case
0' have such relation, that is, and 0.5 (mm)≤X
0'≤5 (mm).
(17) a kind of metal continuous cast crystallizer, it is characterized in that: in the crystallizer bottom, surround strand ground with complete all shapes or at least wide side, make strand and crystallizer that recess is set fully non-contiguously, the side of recess be provided with high-pressure fluid below blow out and use gap nozzle.
(18) as above-mentioned (17) described metal continuous cast crystallizer, it is characterized in that: blow out the horizontal range X of the side of this recess of using gap nozzle to above-mentioned crystallizer inner face from this below is set
1Have such relation, that is, and 0.5 (mm)≤X
1≤ 5 (mm).
(19) a kind of metal continuous cast crystallizer, it is characterized in that: case is routed to crystallizer in the crystallizer bottom, inner face at this case, surround strand ground with complete all shapes or at least wide side, make strand and crystallizer that recess is set fully non-contiguously, the side of recess be provided with high-pressure fluid below blow out and use gap nozzle.
(20) as above-mentioned (19) described metal continuous cast crystallizer, it is characterized in that: blow out the horizontal range X of the side of this recess of using gap nozzle to the case inner face of the recess upper face side of this case from this below is set
1' have such relation, that is, and 0.5 (mm)≤X
1'≤5 (mm).
(21) as any one described metal continuous cast crystallizer in above-mentioned (5)～(20), it is characterized in that: high-pressure fluid is gases at high pressure.
2) designated state comprises the U.S. and Canadian occasion
Of the present invention be used to address the above problem to be intended to provide a kind of metal continuous cast crystallizer, wherein, full week or at wide the gases at high pressure that cut out along level are set at least and blow out and use gap nozzle in the crystallizer bottom, the stream that arrives the gases at high pressure of this gap nozzle is constituted the shape that can produce attached wall effect, the attached wall effect of the gases at high pressure that blow out by this gap nozzle attracts strand to make it near the crystallizer inwall, eliminate the air gap that produces between crystallizer-strand, improve the heat absorption capacity of crystallizer, make high-speed casting become possibility.
As the formation that produces attached wall effect effectively, it is characterized in that: for the stream shape of the gases at high pressure that arrive gap nozzle, make nearby circular-arc or towards the bending of outer lug, making its radius of curvature is that the high pressure flow path width is more than 3 times of gap nozzle along being shaped as of casting direct of travel.
In addition, as another formation, it is characterized in that: the stream that arrives the gases at high pressure of gap nozzle tilts along the casting direction of advance, and the angle that tilts towards this casting direction is below 60 degree.
In addition, as another formation, it is characterized in that: made up above-mentioned formation at 2, the stream that promptly arrives the gases at high pressure of gap nozzle tilts along the casting direction of advance, the angle that tilts towards this casting direction is below 60 degree, and this stream is nearby circular-arc or towards the bending of outer lug, its radius of curvature is more than 3 times of gases at high pressure flow path width along being shaped as of casting direction of gap nozzle.
That is, casting mold for continuous casting of the present invention is as follows.
(22) a kind of metal continuous cast crystallizer, it is characterized in that: full week or have the gases at high pressure that cut out along level to blow out at wide mask at least to use gap nozzle in the crystallizer bottom, as the shape of stream in the vertical section vertical of the gases at high pressure that arrive this gap nozzle, make stream nearby circular-arc or towards the bending of outer lug of gap nozzle along being shaped as of casting direction with the crystallizer inner face.
(23) as above-mentioned (22) described metal continuous cast crystallizer, it is characterized in that: make above-mentioned gases at high pressure stream at gap nozzle the circular-arc or radius of curvature of the part of convex curved shape outwardly nearby along being shaped as of casting direction, be more than 3 times of gases at high pressure flow path width.
(24) a kind of metal continuous cast crystallizer is characterized in that: in full week or have the gases at high pressure that cut out along level to blow out at wide mask at least use gap nozzle in the crystallizer bottom, the stream of gases at high pressure that arrives gap nozzle is along the inclination of casting direction of advance.
(25) as above-mentioned (24) described metal continuous cast crystallizer, it is characterized in that: the angle that the stream of above-mentioned gases at high pressure tilts along the casting direction of advance is below 60 degree.
(26) a kind of metal continuous cast crystallizer, it is characterized in that: full week or have the gases at high pressure that cut out along level to blow out at wide mask at least to use gap nozzle in the crystallizer bottom, the stream that arrives the gases at high pressure of this gap nozzle tilts along the casting direction of advance, and this stream is nearby circular-arc or towards the bending of outer lug along being shaped as of casting direction of gap nozzle.
(27) as above-mentioned (26) described metal continuous cast crystallizer, it is characterized in that: the angle that the stream of above-mentioned gases at high pressure tilts along the casting direction of advance is below 60 degree, and, this stream is more than 3 times of gases at high pressure flow path width in the gap nozzle circular-arc or radius of curvature of the part of convex curved shape outwardly along being shaped as of casting direction of advance nearby.
The simple declaration of accompanying drawing
1) designated state does not comprise the U.S. and Canadian occasion
Fig. 1 (a) is the schematic diagram of crystallizer of the present invention ((5)).
Fig. 1 (b) blows out the key diagram of the horizontal range X that uses gap nozzle to the below for the crystallizer inner face from Fig. 1 (a).
Fig. 2 is the perspective view of crystallizer of the present invention ((5)).
Fig. 3 (a) is the schematic diagram of crystallizer of the present invention ((11)).
Fig. 3 (b) blows out the horizontal range X that uses gap nozzle to the below for the crystallizer inner face from Fig. 3 (a)
0, blow out with the side of the recess of gap nozzle horizontal range X from the below that is provided with of crystallizer of the present invention to the crystallizer inner face
1, Fig. 3 (a) and the vertical length a of crystallizer recess of the present invention and the key diagram of horizontal length b.
Fig. 4 is the perspective view of crystallizer of the present invention ((11)).
Fig. 5 is the schematic diagram of crystallizer of the present invention ((8)).
Fig. 6 is the schematic diagram of crystallizer of the present invention ((19)).
Fig. 7 illustrates the relation of the decompression degree Δ P of crystallizer among Fig. 1 and the horizontal range X from the crystallizer inner face to gap nozzle.
2) designated state comprises the U.S. and Canadian occasion
Fig. 8 is the schematic diagram that has adopted air gap control of the present invention.
Fig. 9 is the ideograph perpendicular to the vertical section of crystallizer inner face of the present invention's the 1st crystallizer.
Figure 10 is cut into the figure that crystallizer inner face gases at high pressure of the present invention blow out the appearance of usefulness gap nozzle for pattern ground illustrates.
Figure 11 is the ideograph perpendicular to the vertical section of crystallizer inner face that the present invention's the 2nd crystallizer is shown.
Figure 12 is the ideograph perpendicular to the vertical section of crystallizer inner face that the present invention's the 2nd crystallizer is shown.
Figure 13 is the schematic diagram that the air gap that produces in the existing casting is shown.
Figure 14 illustrates the schematic diagram that is blown into the occasion of air by existing gap nozzle.
The optimised form that carries out an invention
1) designated state does not comprise the U.S. and Canadian occasion
Being suitable for metal of the present invention is steel, aluminium, titanium etc., particularly is fit to the continuous casting of steel.
Below with reference to the accompanying drawings explanation used the present invention fixedly crystallizer in continuous casting, control the method for air gap.In the present invention, as shown in Figure 1, be blown into gases at high pressure 5 in the crystallizer bottom face, this gas 5 flows towards the casting direct of travel along casting billet surface, is reduced pressure in its space that is surrounded by jet-stream wind 13-strand 3-crystallizer 1 behind or is formed vacuum by jeting effect.Here, the crystallizer bottom only illustrates the part near outlet on the casting direct of travel.
Fig. 1 is for illustrating the vertical sectional drawing perpendicular to the crystallizer inner face of (5) described invention.The crystallizer bottom face have gases at high pressure below blow out with gap nozzle 6, this gap nozzle 6 surrounds strands 3 and is configured abreast at the relative casting billet surface in the bottom surface of wide 11 side abreast or at least with the relative casting billet surface of complete all shapes.The gap nozzle that is arranged at the crystallizer bottom face with Quan Zhouzhuan shown in Fig. 2 (a) like that, the gap nozzle 6 that is cut into abreast for casting billet surface relatively.In addition, only being arranged at the gap nozzle of bottom surface, is the gap nozzle 6 that only is cut into abreast in two wide 11 bottom surface of crystallizer inner face like that shown in Fig. 2 (b).
Fig. 5 is for illustrating (8) the described vertical sectional drawing vertical with the crystallizer inner face of the present invention.In this device, will have crystallizer now and keep intact, continuing below existing crystallizer 1 has the case 17 that gases at high pressure blow out usefulness gap nozzle 6, forms the device that has with the described device same effect of claim 3.
Fig. 3 is for illustrating (11) the described vertical sectional drawing vertical with the crystallizer inner face of the present invention, surround strand ground in the crystallizer bottom with complete all shapes or make strand and the complete discontiguous recess 14 of crystallizer wide side setting at least, and on recess 14 15 have relative casting billet surface configured in parallel gases at high pressure below blow out usefulness gap nozzle 6.With Quan Zhouzhuan be arranged at gap nozzle above the recess shown in Fig. 4 (a) like that, the gap nozzle 6 that is cut into abreast for casting billet surface relatively, and be connected to above two wide 11 the recess of crystallizer with Quan Zhouzhuan and above two narrow 12 the recess.In addition, only be arranged at wide the gap nozzle above the recess, shown in Fig. 4 (b), like that, be the gap nozzle 6 that only relative strand is cut into abreast on two wide 11 recess of crystallizer.
Fig. 6 is for illustrating (19) the described vertical sectional drawing vertical with the crystallizer inner face of the present invention, the case 17 that continues and be connected in the crystallizer bottom with crystallizer 1, surround strand ground at the inner face of this case and make strand and the complete discontiguous recess 14 of crystallizer with complete all shapes or to being less than wide side setting, and have in the side 16 of recess 14 relative casting billet surface configured in parallel gases at high pressure below blow out usefulness gap nozzle 6.
Under above such structure condition, blow out gases at high pressure from the bottom surface of crystallizer bottom towards the below, be formed on casting billet surface along the casting direction airflow flowing, the space that is surrounded by jet-stream wind 13-crystallizer 1-strand 3 is formed vacuum or reduce pressure by jeting effect, strand 3 is attracted to the crystallizer side, make it closely attached to crystallizer 1, thereby can eliminate air gap.
In air gap control method of the present invention, do not need in the additional expensive mechanical type mechanism of fixing crystallizer, can utilize the jeting effect that is blown into gas to form decompression with lower expense, the control air gap, the productivity ratio that product defects that being suppressed at becomes problem in the continuous casting operation bulge causes and bleed-out cause descends.Vacuum Δ P changes with steel grade, casting speed are different, but at 0～0.8[atm] about value under can see effect.In addition, make the speed U that is blown into gas
0Change in time, also can to vacuum carry out positive through the time control.
In the present invention, for the size of crystallizer, establishing long limit is l, and minor face is m, and length of mould is n, then substantially in following scope.
The occasion of slab casting:
0.5(m)≤l≤2.5(m)
0.03(m)≤m≤1.0(m)
0.1(m)≤n≤2.0(m)
The occasion of bloom and the casting of little square billet:
0.05(m)≤l≤1.0(m)
0.05(m)≤m≤1.0(m)
0.1(m)≤n≤1.0(m)
Decompression degree Δ P is 0＜Δ P＜0.8 (atm), is preferably 0.01 (atm)≤Δ P≤0.5 (atm).During Δ P=0 there be not fully effect of easing stress, Δ P 〉=0.8 o'clock strand produces bleed-out.
If the crystallizer inner face is X (occasion of Fig. 1), X to the horizontal range of gap nozzle
0(occasion of Fig. 3), X
1, the horizontal range from the inner face of case to gap nozzle is X ' (occasion of Fig. 5), X
0', X
1' (occasion of Fig. 6), then substantially in following scope:
0＜X、X
0、X
1、X′、X
0′、X
1′≤100(mm)
Be preferably
0.5(mm)＜X、X
0、X
1、X′、X
0′、X
1′≤8(mm)
Be blown into the speed U of gas
0Substantially in following scope:
30(m/s)≤U
0≤1000(m/s)
Be preferably
50(m/s)≤U
0≤500(m/s)
The width d of gap nozzle is substantially in following scope:
0.05(mm)≤d≤2(mm)
Be preferably
0.1≤d≤1.0(mm)
If the vertical length of the recess of crystallizer is a, horizontal length is b, and the recess vertical length of case is a ', and horizontal length is b ', then is roughly following scope.
0≤a/b、a′/b′≤100
b≥X、X
0、X
1、X′、X
0′、X
1′
2) designated state comprises the U.S. and Canadian occasion
Being suitable for metal of the present invention is steel, aluminium, titanium etc., particularly is fit to the continuous casting of steel.
Explanation uses fixedly crystallizer of the present invention to control the method for air gap in continuous casting with reference to the accompanying drawings below.In the present invention, as shown in Figure 8, be blown into gases at high pressure 5 in the crystallizer lower inner face in 3 of crystallizer 1-strands, this gas 5 flows towards the casting direct of travel, by jeting effect to reducing pressure by its space behind or forming vacuum.Here, the crystallizer lower inner face refers to cast on the direct of travel near face portion in the crystallizer of outlet, by the gap nozzle that flatly switches to below the 20cm of crystallizer lower end is set, thereby can utilize the attached wall effect of the gases at high pressure that blow out thus.Distance from the meniscus to the gap nozzle is effective cooling length, thus short more good more, but considering when blowing out gases at high pressure stream and crystallizer cooling water etc., might be restricted apart from the distance of lower end.Also can keep existing crystallizer constant, and will have short crystallizer that gases at high pressure blow out gap nozzle be arranged on have now crystallizer below.
At first, suitable air-flow formation method is described.Figure 14 illustrates the movement that is blown into the occasion of gas 5 by common gap nozzle (gas blows out the straight type gap nozzle that the relative crystallizer inner face of angle is 90 degree) towards crystallizer 1-strand 3.Have the distribution of hydrostatic pressing 9 in the molten steel side, past more vertical below hydrostatic pressing is high more, and solidified shell thin in crystallizer also is applied with same hydrostatic pressing.In the occasion that is blown into gas 5 by above-mentioned gap nozzle, gas has the character that flows to a low side from the high side of hydrostatic pressing, so flow towards the direction opposite with the casting direct of travel.For this reason, the gas portion of solidifying in the early stage upsets solidified shell and directly contacts with molten steel, and operation can not be carried out.
In the present invention, so that gas becomes towards the suitable of casting direct of travel flows, as Fig. 9, Figure 10 or as shown in Figure 11, gap nozzle 6 is carried out alone shape processing in order to remedy this shortcoming.
Fig. 9 is for illustrating the (22)～the (23) the described vertical sectional drawing vertical with the crystallizer inner face of the present invention.Having the gases at high pressure that level is cut into full week of crystallizer lower inner face or wide at least 11 blows out with gap nozzle 6.The gap nozzle 6 that is located at full week of crystallizer is such as Figure 10 (a) shown in, for link with Quan Zhouzhuan two wide 11 of the crystallizer inner face with two parallel gap nozzles that are cut into 6 in leptoprosopy 12 ground.In addition, only be arranged at wide gap nozzle shown in Figure 10 (b) like that, for only at two wide 11 gap nozzle that is cut into abreast 6 of crystallizer inner face.The gases at high pressure stream that links to each other with this gap nozzle 6 is preferably circular-arc or towards the bending of outer lug in the shape of gap nozzle casting direct of travel side nearby, and to make its radius of curvature be more than 3 times of width (d among Fig. 9,11,12) of gases at high pressure stream 10, thereby bring out attached wall effect, no matter how hydrostatic pressing distributes, gas is flowed towards the casting direct of travel.In this occasion, because attached wall effect is easy to produce, so, as establishing gas, to blow out speed be that U, gas flow path width are that d, aerodynamic force viscosity are ν, then Reynolds coefficients R e (=Ud/ ν) is preferably in more than 2000.In addition, as bending, can be the smooth surface that in satisfying the scope of above-mentioned condition, radius of curvature is slowly changed to outer lug, also can be with curved surface as approximate polyhedral planar set zoarium.
Figure 11 is for illustrating (24)～(25) the described vertical sectional drawing vertical with the crystallizer inner face of the present invention, tilt below 60 degree by facing the casting direct of travel in the stream 10 relative crystallizers that make the gases at high pressure that link to each other with gap nozzle 6, form flowing towards casting direction.The angle of inclination is θ shown in Figure 11.In this occasion, as also not using the described condition of claim 22～23, the angle of inclination that then preferably makes stream makes Reynolds coefficients R e more than 2000 below 30 degree.
Figure 12 illustrates (26)～(27) described the present invention, and above-mentioned two kinds of gimmicks are lumped together.
Below, the supply pressure of gases at high pressure 5 is described.As shown in Figure 12, as the distance of establishing gap nozzle position and crystallizer bottom is L (cm), then the hydrostatic pressure reduction between the gap nozzle-crystallizer bottom of the occasion effect of air gap complete obiteration be (L/148) (atm), so, as the supply pressure of gas, the loss of total pressure that should be not less than gas flow systems adds (L/148) (atm).
In the above conditions, 3 winding-up gases at high pressure are to produce attached wall effect from the crystallizer lower inner face towards strand, thereby form towards casting direct of travel airflow flowing, form vacuum or decompression position 3 of crystallizer 1-strands, strand 3 is attracted to the crystallizer side, make it closely to contact, thereby can eliminate air gap or control air gap thickness with crystallizer 1.
In air gap control device of the present invention, not be used in the fixedly additional expensive mechanical type mechanism of crystallizer, can utilize the attached wall effect that is blown into gas to form decompression with low expense, the control air gap suppresses to become in the continuous casting operation bulge of problem and productivity ratio that bleed-out causes and descends.(embodiment)
1) designated state does not comprise the U.S. and Canadian occasion
(embodiment 1)
(1), (11) and (17) described embodiments of the invention are shown in table 1.Below, under the operating condition of table 1, carry out the continuous casting of steel.At first, in order to judge whether to have eliminated air gap, the scar situation of the crystallizer inner face after the casting is observed.The result shows, in existing operation, except that meniscus nearby,, do not observe and can be used as strand 3 contacts person's movements and expression with crystallizer 1 scar to the bottom from the crystallizer middle part, proved the existence of air gap 8.On the other hand, the crystallizer inner face after the casting that has utilized apparatus of the present invention is observed scar at Zone Full under from the meniscus to the crystallizer.Deducibility goes out to have eliminated in the present invention air gap thus.
Table 1 has adopted the experiment condition of the inventive method and device
| The machine shape | The vertical bending type that has the 2.5m vertical section |
| Length of mould | From meniscus to crystallizer lower end 800[mm] |
| The casting steel grade | Carbon aluminium-killed steel |
| Casting speed | 2.0[mpm] |
| The strand size | Wide 1500[mm], thick 240[mm] |
| The gap nozzle shape | D=0.2[mm], leniently complete all gap nozzles of face and leptoprosopy are blown into |
| Gas flow | 1680[N1/min] |
| The gas velocity of discharge | U＝40[m/s] |
| The gas supply pressure | 3[atm] |
| The outlet position | Horizontal range X=5[mm apart from the crystallizer inner face] X 0＝5[mm] ??????????????????????X′＝5[mm] |
Then, measure the bulge amount that strand produces between the roller under the crystallizer.Relatively more existing crystallizer and crystallizer of the present invention in table 2.With the casting of existing crystallizer more as can be known, in the casting of crystallizer of the present invention, the bulge amount of crystallizer bottom reduces to about 1/2～1/3, has confirmed validity of the present invention.
The measurement result of table 2 bulge amount
| The bulge amount of crystallizer bottom | |
| Existing crystallizer | ????0.10～0.30[mm] |
| Crystallizer of the present invention | ????0.05～0.17[mm] |
Then, the results are shown in the table 3 of covering slag consumption figure of the occasion of casting speed will be changed.In addition; according to crystallizer of the present invention, because crystallizer bottom decompression or become vacuum, so the feed speed of lubrication protection slag such increasing as shown in table 3; 2[mpm particularly] during above high-speed casting and when using the casting of high-viscosity covering slag, can reduce smooth lubricated and lobe.
About lubrication protection slag viscosity, mu [pool], preferably has following relation.
(0.1 pool)＜μ＜μ max
Be preferably
The measurement result of table 3 covering slag consumption figure
| Casting speed [mpm] | 1.0 | ?2.0 | ?3.0 | ?4.0 | ?5.0 |
| Covering slag viscosity 1 (pool) when the present invention does not use | 0.65 kg/m 2 | ?0.34 ?kg/m 2 | ?0.24 ?kg/m 2 | ?0.20 ?kg/m 2 | ?0.18 ?kg/m 2 |
| Covering slag viscosity l (pool) when the present invention uses | 1.25 kg/m 2 | ?0.60 ?kg/m 2 | ?0.37 ?kg/m 2 | ?0.26 ?kg/m 2 | ?0.21 ?kg/m 2 |
| Covering slag viscosity 3 (pool) when the present invention uses | 1.10 kg/m 2 | ?0.55 ?kg/m 2 | ?0.32 ?kg/m 2 | ?0.24 ?kg/m 2 | ?0.20 ?kg/m 2 |
* the definition of lubrication protection slag viscosity: by the viscosimetry of inner core rotary method 1300 (℃) value measured.
2) designated state comprises the U.S. and Canadian occasion
(embodiment 2)
(27) described embodiments of the invention are shown in table 4.
Below, under the operating condition of table 4, carry out the continuous casting of steel.At first, in order to judge whether to have eliminated air gap, the scar situation of the crystallizer inner face after the casting is observed.The result shows, in existing operation, except that meniscus nearby,, do not observe and can be used as crystallizer 3 contacts person's movements and expression with crystallizer 1 scar to the bottom from the crystallizer middle part, proved exist (with reference to Figure 14) of air gap 8.On the other hand, the crystallizer inner face after the casting that has utilized the inventive method and device is observed scar at Zone Full under from the meniscus to the crystallizer.Deducibility goes out to have eliminated in the present invention air gap thus.
Table 4
| The machine shape | The vertical bending type that has the 2.5m vertical section |
| Length of mould | From meniscus to crystallizer lower end 800[mm] |
| The casting steel grade | Carbon aluminium-killed steel |
| Casting speed | 2.0[mpm] |
| The strand size | Wide 1500[mm], thick 240[mm] |
| The gap nozzle shape | D=0.2[mm], leniently complete all gap nozzles of face and leptoprosopy are blown into |
| Gas flow | 1680[N1/min] |
| The gas velocity of discharge | U＝40[m/s] |
| The gas supply pressure | 3[atm] |
| The outlet shape | Be blown into angle: spend towards casting direct of travel bottom arc radius 10[mm with 30] from the crystallizer inner face |
| The outlet position | Distance L=100[mm apart from the crystallizer lower end] |
Then, measure the bulge amount that the strand between the roller under the crystallizer produces.In table 5 relatively existing operation with based on operation of the present invention.With the casting of existing crystallizer more as can be known, in the casting of adopting crystallizer of the present invention, the bulge amount of crystallizer bottom reduces to about 1/2～1/3, has confirmed validity of the present invention.
Table 5
| The bulge amount of crystallizer bottom | |
| Existing crystallizer | ????0.10～0.30[mm] |
| Crystallizer of the present invention | ????0.04～0.14[mm] |
The possibility of utilizing on the industry (effect of invention)
1) designated state does not comprise the occasion of America ﹠ Canada
According to continuous cast method and the casting mold for continuous casting of steel of the present invention, by applying the processing of low expense, can produce decompression or vacuum space in desired position, make and cast the corresponding air gap control of steel grade and become possibility, can reduce casting blank defect and bleed-out.
That is, in the present invention, gas is without flowing to the top between crystallizer-strand, the time below of being everlasting stably flow.
For this reason; the present invention also can be to stably supplying with covering slag between crystallizer-strand and having good lubricity when high-speed casting and use high-viscosity covering slag; can eliminate the air gap between crystallizer-strand in the crystallizer bottom, thereby can provide cooling performance good casting mold for continuous casting.
In addition, in the present invention, because gap nozzle directly do not contact the high temperature strand, also obstructed overprotection slag contact strand, so the melting loss of gap nozzle is few, and gap nozzle do not produce thermal deformation, thereby both economical.
2) designated state comprises the occasion of America ﹠ Canada
According to casting mold for continuous casting of the present invention, by in the continuous cast mold of steel, applying the processing of low expense, can make and cast the corresponding air gap control of steel grade and become possibility, thereby can reduce casting blank defect and bleed-out.
Claims (27)
1. metal continuous cast method, it is characterized in that: in metal continuous cast, crystallizer bottom surface in the crystallizer bottom, or on the recess that strand and crystallizer are provided with fully non-contiguously or the side, gap nozzle is set, from this gap nozzle surround strand ground with complete all shapes or at least leniently the face side blow out high-pressure fluid towards the below, thereby reduced pressure in the space that is surrounded by crystallizer, strand and high-pressure fluid.
2. metal continuous cast method, it is characterized in that: in metal continuous cast, in the crystallizer bottom case is routed to crystallizer, bottom face at this case, or on the recess that strand and this case are provided with fully non-contiguously or the side, gap nozzle is set, from this gap nozzle surround strand ground with complete all shapes or at least leniently the face side blow out high-pressure fluid towards the below, thereby reduced pressure in the space that is surrounded by case, strand and this high-pressure fluid.
3. metal continuous cast method as claimed in claim 1 or 2 is characterized in that: decompression degree Δ P has such relation, that is, and and 0.01≤Δ P≤0.5 (atm).
4. as any one described metal continuous cast method in the claim 1～3, it is characterized in that: high-pressure fluid is gases at high pressure.
5. metal continuous cast crystallizer is characterized in that: the bottom face of this crystallizer have high-pressure fluid below blow out and use gap nozzle, this gap nozzle surrounds strand ground with complete all shapes or be configured wide side bottom surface at least.
6. metal continuous cast crystallizer as claimed in claim 5 is characterized in that: blow out below this with between gap nozzle and this crystallizer inner face crystallizer inwall being set.
7. as claim 5 or 6 described metal continuous cast crystallizers, it is characterized in that: the horizontal range X that blows out with gap nozzle to this below from this crystallizer inner face has such relation, that is, and and 0.5 (mm)≤X≤5 (mm).
8. metal continuous cast crystallizer, it is characterized in that: case is routed to crystallizer in the crystallizer bottom, the bottom face of this case have high-pressure fluid below blow out and use gap nozzle, this below blows out with gap nozzle and surrounds strand ground with complete all shapes or be configured in the bottom surface of wide side at least.
9. metal continuous cast crystallizer as claimed in claim 8 is characterized in that: blow out below this between inner face with gap nozzle and this case dividing plate is set.
10. metal continuous cast crystallizer as claimed in claim 8 or 9, it is characterized in that: the horizontal range X ' that blows out with gap nozzle to this below from this case inner face has such relation, that is, and 0.5 (mm)≤X '≤5 (mm).
11. metal continuous cast crystallizer, it is characterized in that: in the crystallizer bottom, surround strand ground with complete all shapes or at least wide side, make strand and crystallizer that recess is set fully non-contiguously, on recess, be provided with high-pressure fluid below blow out and use gap nozzle.
12. metal continuous cast crystallizer as claimed in claim 11 is characterized in that: below this, blow out the crystallizer inwall is set between the inner face with gap nozzle and this crystallizer.
13., it is characterized in that: blow out the horizontal range X that uses gap nozzle to this below from this crystallizer inner face as claim 11 or 12 described metal continuous cast crystallizers
0Have such relation, that is, and 0.5 (mm)≤X
0≤ 5 (mm).
14. metal continuous cast crystallizer, it is characterized in that: case is routed to crystallizer in the crystallizer bottom, inner face at this case, surround strand ground with complete all shapes or to being less than wide side, make strand and crystallizer that recess is set fully non-contiguously, on recess, be provided with high-pressure fluid below blow out and use gap nozzle.
15. metal continuous cast crystallizer as claimed in claim 14 is characterized in that: below this, blow out between the case inner face with the recess upper face side of gap nozzle and this case dividing plate is set.
16., it is characterized in that: blow out horizontal range X to this below with gap nozzle from the case inner face of the recess upper face side of this case as claim 14 or 15 described metal continuous cast crystallizers
0' have such relation, that is, and 0.5 (mm)≤X
0'≤5 (mm).
17. metal continuous cast crystallizer, it is characterized in that: in the crystallizer bottom, surround strand ground with complete all shapes or to being less than wide side, make strand and crystallizer that recess is set fully non-contiguously, the side of recess be provided with high-pressure fluid below blow out and use gap nozzle.
18. metal continuous cast crystallizer as claimed in claim 17 is characterized in that: blow out the horizontal range X of the side of this recess of using gap nozzle to above-mentioned crystallizer inner face from this below is set
1Have such relation, that is, and 0.5 (mm)≤X
1≤ 5 (mm).
19. metal continuous cast crystallizer, it is characterized in that: case is routed to crystallizer in the crystallizer bottom, inner face at this case, surround strand ground with complete all shapes or to being less than wide side, make strand and crystallizer that recess is set fully non-contiguously, the side of recess be provided with high-pressure fluid below blow out and use gap nozzle.
20. metal continuous cast crystallizer as claimed in claim 19 is characterized in that: blow out the horizontal range X of the side of this recess of using gap nozzle to the case inner face of the recess upper face side of this case from this below is set
1' have such relation, that is, and 0.5 (mm)≤X
1'≤5 (mm).
21. as any one described metal continuous cast crystallizer in the claim 5～20, it is characterized in that: high-pressure fluid is gases at high pressure.
22. metal continuous cast crystallizer, it is characterized in that: full week or have the gases at high pressure that cut out along level to blow out at wide mask at least to use gap nozzle in the crystallizer bottom, as the shape of the vertical section vertical of the gases at high pressure stream of linking this gap nozzle, make stream nearby circular-arc or towards the bending of outer lug of gap nozzle along being shaped as of casting direction of advance with the crystallizer inner face.
23. metal continuous cast crystallizer as claimed in claim 22, it is characterized in that: make above-mentioned gases at high pressure stream at gap nozzle the circular-arc or radius of curvature of the part of convex curved shape outwardly nearby along being shaped as of casting direction of advance, be more than 3 times of gases at high pressure flow path width.
24. metal continuous cast crystallizer as claimed in claim 22, it is characterized in that: complete all shapes or have the gases at high pressure that cut out along level to blow out at wide mask at least to use gap nozzle in the crystallizer bottom, the stream of linking the gases at high pressure of this gap nozzle tilts along the casting direct of travel.
25. metal continuous cast crystallizer as claimed in claim 22 is characterized in that: the angle that above-mentioned high-pressure gas flow curb casting direct of travel tilts is below 60 degree.
26. metal continuous cast crystallizer, it is characterized in that: full week or have the gases at high pressure that cut out along level to blow out at wide mask at least to use gap nozzle in the crystallizer bottom, the high-pressure gas flow curb casting direct of travel of linking this gap nozzle tilts, and this stream is nearby circular-arc or towards the bending of outer lug along being shaped as of casting direction of advance of gap nozzle.
27. metal continuous cast crystallizer as claimed in claim 26, it is characterized in that: the angle that above-mentioned high-pressure gas flow curb casting direct of travel tilts is below 60 degree, and, this stream is more than 3 times of gases at high pressure flow path width in the gap nozzle circular-arc or radius of curvature of the part of convex curved shape outwardly along being shaped as of casting direction of advance nearby.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP249271/1998 | 1998-09-03 | ||
| JP24927198A JPH11147161A (en) | 1997-09-04 | 1998-09-03 | Continuous casting method and mold for continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1272074A true CN1272074A (en) | 2000-11-01 |
Family
ID=17190494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99800847 Pending CN1272074A (en) | 1998-09-03 | 1999-03-04 | Continuous casting method and casting mold for continuous casting |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1272074A (en) |
| AU (1) | AU2745699A (en) |
| WO (1) | WO2000013821A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330440C (en) * | 2002-07-10 | 2007-08-08 | 丹尼利机械设备股份公司 | Strip temperature regulating device in a continuous metal strip casting plant |
| CN111545715A (en) * | 2019-02-12 | 2020-08-18 | 株式会社神户制钢所 | Continuous casting mold, continuous casting device, and continuous casting method |
| CN114406213A (en) * | 2022-01-20 | 2022-04-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Air seal type continuous casting crystallizer device |
| CN115401179A (en) * | 2022-08-23 | 2022-11-29 | 北京首钢股份有限公司 | Control method of cooling water of short side of continuous casting crystallizer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455990C (en) * | 2006-06-30 | 2009-01-28 | 宝山钢铁股份有限公司 | Method and apparatus for measuring protection slag thickness in continuous casting crystallizer in |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62197248A (en) * | 1986-02-25 | 1987-08-31 | Sumitomo Metal Ind Ltd | Lubricating method in continuous casting mold |
| JPH04178249A (en) * | 1990-11-09 | 1992-06-25 | Sumitomo Metal Ind Ltd | Method for lubricating inside of casting mold for continuous casting |
| JPH10291054A (en) * | 1997-04-21 | 1998-11-04 | Nippon Steel Corp | Mold for continuous casting |
-
1999
- 1999-03-04 WO PCT/JP1999/001036 patent/WO2000013821A1/en active Application Filing
- 1999-03-04 CN CN 99800847 patent/CN1272074A/en active Pending
- 1999-03-04 AU AU27456/99A patent/AU2745699A/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330440C (en) * | 2002-07-10 | 2007-08-08 | 丹尼利机械设备股份公司 | Strip temperature regulating device in a continuous metal strip casting plant |
| CN111545715A (en) * | 2019-02-12 | 2020-08-18 | 株式会社神户制钢所 | Continuous casting mold, continuous casting device, and continuous casting method |
| CN114406213A (en) * | 2022-01-20 | 2022-04-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Air seal type continuous casting crystallizer device |
| CN115401179A (en) * | 2022-08-23 | 2022-11-29 | 北京首钢股份有限公司 | Control method of cooling water of short side of continuous casting crystallizer |
| CN115401179B (en) * | 2022-08-23 | 2023-12-26 | 北京首钢股份有限公司 | Control method of cooling water for short side of continuous casting billet crystallizer |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2745699A (en) | 2000-03-27 |
| WO2000013821A1 (en) | 2000-03-16 |
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