CN1237120A - Improved unit of equipments for high-speed continuous casting of good quality thin steel slabs - Google Patents
Improved unit of equipments for high-speed continuous casting of good quality thin steel slabs Download PDFInfo
- Publication number
- CN1237120A CN1237120A CN97199628A CN97199628A CN1237120A CN 1237120 A CN1237120 A CN 1237120A CN 97199628 A CN97199628 A CN 97199628A CN 97199628 A CN97199628 A CN 97199628A CN 1237120 A CN1237120 A CN 1237120A
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- Prior art keywords
- mold
- casting
- area
- mould
- falcate
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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
- B22D11/14—Plants for continuous casting
- B22D11/142—Plants for continuous casting for curved 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
-
- 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
- B22D11/0408—Moulds for casting thin slabs
-
- 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
- B22D11/053—Means for oscillating the moulds
-
- 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
- B22D11/055—Cooling the moulds
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Unit of equipments for the continuous casting of steel slabs, especially low thickness slabs at high speed, comprising a mould (1) fed by a submerged nozzle (2) and connected to an oscillator (3) driven by a hydraulic servocontrol, wherein the following geometrical relation is valid concerning both the mould and the submerged nozzle shapes and their mutual arrangement: (A1/S1)/(A2/S2) = 0.9 DIVIDED 1.1 and preferably A1/S1 = A2/S2, wherein, on the mould horizontal section at the meniscus level, A1 is the area enclosed between submerged nozzle and larger sides of the mould, and A2 is the residual area on said section, between submerged nozzle and smaller sides, S1 and S2 being the total sums of the mould peripheral lengths corresponding to each of said areas. Furthermore, at least in the mould horizontal section at the meniscus level, the distance between submerged nozzle and copper plates forming the mould walls is kept constant.
Description
The present invention relates to a kind of improved device that is used for the equipment of the thin high-quality cast slab of high-speed continuous casting.
So-called " thin cast slab ", its thickness are below 80mm, and up to now, direct casting this " thin cast slab " can run into some quality problems, and when particularly at full speed casting, such as casting rate is especially true when 4.5m/min is above.
These quality problems can cause occurring some cracks on the surface of cast slab, the surface of cast slab is exactly our usually said shell, and this shell forms in mold:--owing to being wrapped up, the casting mold powder forms crackle longitudinally;--owing to lacking lubricated and forming the crackle of vertical and horizontal by the barrier film that so-called " slag " forms, wherein " slag " this term is meant casting mold powder resulting product in fusing and after solidifying again;--the longitudinal crack that forms owing to thermal stress; And--because thereby the copper cooling surface is the discontinuous crackle longitudinally that forms.
These quality problems mainly have influence on special steel, and can partly solve these quality problems at least by reducing casting rate, but can cause the reduction of productivity ratio like this and the economic benefit of factory is descended.Another kind of possible solution is to use the calutron of a kind of being called " EMBR " (electromagnetic braking chi), by reducing the height of molten steel fluctuation, this kind device can flatten the fluctuation of molten steel, and the fluctuation of this molten steel makes the falcate surface in mold become corrugated, but a kind of like this calutron is very expensive, and can only partly solve the above problems.And the other problem that causes owing to the geometrical condition in mold and mobility status may make the lost of life of casting nozzle (this casting nozzle is immersed under the liquid metal, is commonly referred to " casting nozzle of diving "), and can cause injurious effects to process efficiency.
Can be clear that thus, independently mold, latent casting nozzle and mold vibrating device be taken measures and can not be addressed the above problem satisfactorily and systematically.These three parts closely connect each other each other, formed " ingot casting device " of a reality, and these three parts work to direct casting, thereby have only package unit are made as a whole a kind of effective solution of taking measures just may find.
The purpose of this invention is to provide a kind of casting device, when at full speed casting cast slab thin, this kind casting device can overcome above-mentioned deficiency.
The assembly of improved each cast part that proposes according to the present invention has feature as claimed in claim 1 usually, and simultaneously according to each special aspects of the present invention, the assembly of each cast part also has the supplementary features described in each dependent claims.
Below will describe in detail a preferential embodiment of the present invention, this description is to carry out in non-limiting mode of giving an example with reference to the accompanying drawings, from these are described, these and other purpose, advantage and the feature of the casting device that proposes according to the present invention will become more apparent, in appended figure:
Fig. 1 is a diagrammatic side views of the casting device that proposes according to the present invention of expression; Fig. 2 is the top of resulting mold itself and the casting nozzle of diving are observed in expression along the direction of the arrow II shown in Fig. 1 a view; Fig. 3 a, 3b, 3c are the sketch of expression along III among Fig. 2-resulting same cross section of III line, wherein III-III line is the height and position that is in the falcate surface, the sketch of these cross sections is a plurality of parts of being considered in order at length to express in geometrical relationship, and mold in the ingot casting device that proposes according to the present invention and latent casting nozzle must satisfy this geometrical relationship; Fig. 4 is the plane of the same mold of expression, has expressed this mold in Descartes's three-axis reference briefly; Fig. 5 a and 5b are two sketches of the mold shown in the presentation graphs 4, wherein in the longitudinal cross-section, expressed the external envelope face of cooling system pipeline by a plane that is parallel to Y-axis among Fig. 4 and Z axle, and by expressed the external envelope face of cooling system pipeline along the resulting sectional view of B-B line among Fig. 5 a.
With reference to each accompanying drawing, Fig. 1 is a sketch according to casting device of the present invention, wherein have casting nozzle 2 and vibrating device 3 under mold 1, the immersed in liquid level, often the casting nozzle under the immersed in liquid level 2 is called " casting nozzle of diving " hereinafter, and according to present embodiment, vibrating device 3 is hydraulically powered and is connected and fixed with the mold body, clearly, can not hinder the casting flow process like this.Also show the section that molten steel flows through among Fig. 1 between the shell of diving casting nozzle 2 and forming along the sidewall of copper, promptly formed two " passages " 4.
As for mold, with respect to traditional casting device, when casting the cast slab that approaches, the subject matter that is produced is that its flow rate of molten steel of fusing is identical, the thickness that reduces cast slab will be increased in the unit interval and the contacted surface of steel ingot of mold wall, thereby just increased needs, defined in front about " slag " to lubricated " slag ".In fact, T1, W1, V1 are thickness, width and the average casting rates of the cast slab of a common thickness, and for a thin cast slab, relevant parameters be T2=T1/a (a＞1), W2=W1 and V2＞＞V1, molten steel flow speed is identical, then has:
T2·W2·V2=T1·W1·V1 (Ⅰ)
So the area of the thin steel ingot of casting is in the unit interval:
2 (T2+W2) V2, if with respect to its width, the thickness of thin steel ingot can be ignored, then 2 (T2+W2) V2 is substantially equal to 2W2V2.Replace W2 with the value that derives from equation (I), V2 then has:
2·W2·V2=2·(T1/T2)·W1·V1=a·(2·W1·V1) (Ⅱ)
Because a＞1, top equation (II) has shown that clearly the lubricated slag of formation covers the importance on contacted surface between interior steel ingot of unit interval and the mold, the thickness of contacted surface and steel ingot is inversely proportional between steel ingot and the mold, and contacted surface is just big more between interior steel ingot of thin more then unit interval of steel ingot and the mold.Opposite, because thickness is very little and in the existence of zone line owing to the casting nozzle of diving, in mold, at the falcate surf zone, the interface between fusing molten steel and the casting mold powder only has less area, above-mentioned slag forms at the interface at this just.
Although can partly address this problem by the casting mold powder that uses the formation that can strengthen slag, in known structural form, still have to consider that latent casting nozzle can not all keep the balance between slag that melts and the slag that is consumed at all falcate surf zones, wherein Rong Hua slag forms owing to the casting mold powder melts, and the consumption of slag is because it penetrates between falcate surface and the inwall.
According to the present invention, thin mold can hold next solid and reliable latent casting nozzle, that is to say and to hold next enough thick latent casting nozzle, around the height and position on above-mentioned falcate surface, in horizontal plane, the appearance profile of latent casting nozzle accurately mates in its profile of big copper coin of mold and the same horizontal plane, thereby makes the everywhere of distance in middle section of diving between casting nozzle and the inwall all remain constant.Referring to Fig. 3 a, 3b and 3c, select the value of this above-mentioned distance to make ratio A 1/S1 and A2/S2 roughly the same, A1/S1 be and the casting mold powder between the ratio of area of cast slab around the area at interface and the latent casting nozzle, wherein and between the casting mold powder area at interface in fact with the direct ratio that is formed into of slag, dive the cast slab around the casting nozzle area in fact with the consumption of the slag (see figure 2) that is directly proportional, ratio A 2/S2 measures (seeing Fig. 3 c) outside latent casting nozzle zone.Thereby the equation that requires to satisfy is:
(A1/S1)/(A2/S2)=0.9 ÷ 1.1, and best=1
For example, for a mold with 1300 * 65mm of the wide latent casting nozzle of 300mm (as represented in Fig. 3 b and Fig. 3 c, having the reliable thickness of 60mm), best ratio is that A1/S1=A2/S2 equals 30mm.For example, after in case the thickness of the size of latent casting nozzle and a less side is determined, this ratio just can be used to determine to be positioned at the shape of mold profile of horizontal plane at the height and position place on falcate surface, perhaps, if the size of known mold profile, this ratio can be used for determine diving contour shape of casting nozzle, the purpose of doing like this are in order to guarantee well balanced along the amount of the lubricated slag of whole mold profile equally.
This geometry also is important for fusing molten steel flow in the falcate surf zone, this be because aforementioned " passage " will be enough greatly to prevent owing to converge to the eddy current that acceleration that the liquid of central authorities flows forms from the less side of mold, at the falcate surf zone, these eddy current usually make the casting mold powder be wrapped and cause occurring above-mentioned defective, wherein above-mentioned " passage " represent with label 4 in Fig. 1, is by diving casting nozzle and pasting copper inwall and zone between the shell that forms constitutes.
It should be noted that the mold that uses vertically preferably has the flexibility of variation at it in casting device according to the present invention, this is the subject content of the applicant's European patent 0705152, in order to settle the casting nozzle of diving better, having at the upper area of this mold almost is infinitely-great bending radius, simultaneously, an outlet is arranged at the inner crooked steel ingot that forms of mold, this outlet is arranged on a casting leader circular arc rather than vertical, can very advantageously reduce the height of casting device like this and reduce ferrostatic pressure accordingly and the danger of steel ingot protuberance.According to above-mentioned patent application, from the infinitely-great radius of mold inlet to radius of curvature R o corresponding to the casting leader, the flexibility of mold is (Fig. 1) that distributes in a kind of progressive and uniform mode, so both avoided on the shell of the steel ingot that has solidified, excessive stress occurring, and also avoided contacting not intact possibility with the copper inwall of mold.
In order to solve related technical problem, the device that is used for cooling off the mold plate is a particular importance, and it is that (its mean value can be up to 3MW/m on the cooling surface of whole mold for very common high heat flux that this cooling device must be able to bear for thin cast slab
2), at the falcate surf zone, this cooling device has the cooling effect that strengthened preventing the cracking of copper, however for the thermal stress of the steel ingot that prevents formed thereby, the cooling effect around the mold is still enough uniformly.
Referring to Fig. 4, specified between the surface of considering to water foundry goods and mold than heat flux (dq
n) time, should have:
dq
n=dq/dA[W/m
2]
This heat flux also is the function of lip-deep local surfaces temperature of the heat of copper coin, and this local surfaces temperature depends on and cooling tube between distance, cooling water just flows in this cooling tube.
As what in Fig. 3, can see, adopt cartesian coordinate system X, Y, Z, wherein the Z axle towards the below in other words towards the bottom of mold, and consider by satisfying f (x, y, mold z)=0 and the complex surface that constitutes, then the local surfaces temperature press t=t[f (x, y, z)] local variation.
Because along a horizontal line on mould surface (Z=Z wherein
0) all must make heat flux dq as much as possible
nRemain a constant, promptly in fact must be retained as a constant along such horizontal line temperature t, thereby:
t=t[f(x,y,z
0)]=t
0
According to the present invention, this point is desirable enveloping surface E (Fig. 5 a by the end of the copper lip-deep every bit that makes heat and all cooling tube W, distance 5b) remains an identical vertical range Nd, and wherein measure on the Nd surface that is perpendicular to heat.So the Nd=constant must be arranged, and in order to make cooling system satisfy above-mentioned condition, can find by experiment, the value of the best of this constant must be to arrive in the scope of 25mm 10.
As for latent casting nozzle, except above-mentioned its size condition with respect to mold, it must be designed to make the mobility status of fusing molten steel to reach optimum, also will consider forming gradually and himself life-span of latent casting nozzle of shell simultaneously.In fact, know, when reducing the thickness of cast slab, the problem relevant with the motion of liquid in the mold just increased, thereby this may cause forming thickness that standing wave can cause molten slag at the falcate surf zone and produces the part and reduce, and so can produce adverse influence to the buffer action of the shell of lubricated and the cast slab that solidifying.
The latent casting nozzle of the cast slab that is used to approach is the subject content of patent application PCT/IT-97/00135 of the applicant, except in mold, having the liquid level control function of having improved, thereby the latent casting nozzle of the cast slab that this is used to approach has some geometric properties to make and to cast in that the exit has low energy and have high power consumption probability in the liquid part inside of cast slab, by means of the guiding of the sidewall shape that slips into part, improved mobility status (thereby prevented the formation of eddy current and wrapped up the casting mold powder) like this.Further, feeding is stable, because the deposition of oxide is negligible, so liquid stream flows out with two strands of liquid streams haply and the initial surface of latent casting nozzle inside has been protected; And those good flox conditions degree in the exterior mechanical corrosion function of falcate surf zone that makes has reduced.
According to the present invention, except above-mentioned condition, design for the optimum of the mold-casting nozzle device of diving is to make the ratio between height of standing wave (peak to peak measures with mm) and the casting rate be no more than 5, and its mean value is 3.3, and wherein casting rate is measured with m/min.
Further, for the sampled signal of mould level (ML), measure the standard deviation of gained and represent with Std DEV (ML), its value is usually in following scope:
Std?DEV(ML)=0.7-1.5mm
At last, for the surface quality of steel ingot and the stability of direct casting process, the 3rd parts in the casting unit just vibrating device 3 also must be considered as a key factor.Referring to Fig. 1, vibrating device can be made of a frame 3a, and this frame 3a is on the ground hinged and driven by a hydraulic servo controlling organization 5.Frame 3a is also hinged with mold supporting 3b, thereby forms a kind of quadrilateral structure, and is fixed with a sleeve spring at its two ends.
The flexibility of control is controlled by FPGA and is obtained, and the control of this kind FPGA can change the vibration parameters relevant with waveform, the amplitude of fluctuation be ± 2 and ± 10mm between, the vibration program is like this too.Control system writes down the actual value of casting rate continuously, thereby formerly controls vibration frequency on the basis of parameter.Because first intrinsic frequency of whole dynamical system is 16.7Hz, the maximum of vibration frequency up to 480～520 times back and forth/minute.Above-mentioned flexibility is exactly to make steel for each quality, can obtain by regulating vibration parameters the lubrication of the best and surface quality as the function of casting speed.
Use another kind of method, vibrating device can be so-called " resonance " type, mold is directly installed on the bending spring, be provided with position system (Without no lever system), make it frequency vibration by a hydraulic servo controlling organization, move along point-device path thereby be provided with the gap with the intrinsic frequency that approaches elastic system.
Under the situation that does not exceed the scope of the invention, those veterans in the present technique field may carry out some interpolations and/or change to the embodiment of above-mentioned ills explanation.Particularly; as long as observe aforesaid geometrical relationship; can have other profile rather than the profile described in the European patent 0705152 at perpendicular internal cast itself, and latent casting nozzle also can be different with latent casting nozzle disclosed and claimed in patent application PCT/IT-97/00135.
Claims (7)
1. device that is used for the equipment of direct casting cast slab, be particularly suitable for little thickness and high-speed, comprise a mold (1) that is used for direct casting, feeding outlet and a vibrating device that drives by the hydraulic servo controlling organization (3) with the outlet of diving or latent casting nozzle (2), wherein mold (1) is that sidewall by copper coin limits in its bigger side, it is characterized in that at least the zone line in the mold horizontal cross-section at the height and position place that is positioned at the falcate surface, the distance of diving between casting nozzle (2) and the copper coin remains constant; And, area (A1) and be area (A2) and corresponding to 1.1 times of 0.9 ÷ of the ratio between the summation (S2) of the mold peripheral length of this area (A2) corresponding to the ratio between the summation (S1) of the mold peripheral lengths of this area (A1), wherein area (A1) is corresponding to the mid portion in the mold horizontal cross-section of falcate apparent height position, this area is the area that is surrounded between a bigger side of mold and latent casting nozzle (2), and area (A2) is the area at the remainder of mold (1) horizontal cross-section of falcate apparent height position; Further, wherein the vertical range (Nd) between the desirable enveloping surface (E) of all ends of the every bit on the mold inner wall surface and each cooling tube (W) is a constant.
2. device as claimed in claim 1 is characterized in that above-mentioned ratio A 1/S1 and A2/S2 are basic equating.
3. device as claimed in claim 1 or 2 is characterized in that above-mentioned its scope of steady state value Nd is 10 to 25mm.
4. as claim 1 or 3 described devices, it is characterized in that in the mold that the ratio of the height of formed standing wave and casting speed can not surpass 5 on the falcate surface, its mean value is 3.3, wherein the height of standing wave measures with mm from peak to peak, and casting speed is measured with m/min.
5. device as claimed in claim 4 is characterized in that the sampled signal of mould level is measured its number range of standard deviation of gained between 0.7 to 1.5mm.
6. as each described device in the claim of front, it is characterized in that vibrating device (3) is by four push and pull system (3a, 3b, 3c) constitute, this vibrating device (3) has hydraulic servo controlling organization (5), this hydraulic servo controlling organization (5) can ± 2 and ± change the amplitude of vibration and wave motion between the 10mm.
7. as any one described device among the claim 1-5, it is characterized in that vibrating device (3) is a resonance type, wherein mold (1) is directly installed on the bending spring very close to each otherly, drives by the frequency of a hydraulic servo controlling organization with the intrinsic frequency that approaches elastic system.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT96MI002336A IT1287156B1 (en) | 1996-11-12 | 1996-11-12 | PERFECTED SET OF EQUIPMENT FOR CONTINUOUS CASTING AT HIGH SPEED OF THIN SHEETS OF GOOD QUALITY |
| ITMI96A002336 | 1996-11-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1237120A true CN1237120A (en) | 1999-12-01 |
| CN1072535C CN1072535C (en) | 2001-10-10 |
Family
ID=11375188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97199628A Expired - Lifetime CN1072535C (en) | 1996-11-12 | 1997-11-12 | Improved unit of equipments for high-speed continuous casting of good quality thin steel slabs |
Country Status (14)
| Country | Link |
|---|---|
| EP (1) | EP0946316B1 (en) |
| JP (1) | JP3974186B2 (en) |
| KR (1) | KR100539994B1 (en) |
| CN (1) | CN1072535C (en) |
| AT (1) | ATE211416T1 (en) |
| AU (1) | AU718124B2 (en) |
| BR (1) | BR9713007A (en) |
| CA (1) | CA2269130C (en) |
| DE (1) | DE69709899T2 (en) |
| ES (1) | ES2169436T3 (en) |
| IT (1) | IT1287156B1 (en) |
| RU (1) | RU2195384C2 (en) |
| WO (1) | WO1998020997A1 (en) |
| ZA (1) | ZA979675B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264490A (en) * | 2008-12-25 | 2011-11-30 | 住友金属工业株式会社 | Method of continuous steel casting |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19817701C2 (en) * | 1998-04-21 | 2000-09-28 | Sms Demag Ag | Lifting table with oscillation drive for a continuous caster |
| ES2314642T3 (en) | 2005-04-07 | 2009-03-16 | Giovanni Arvedi | PROCESS AND SYSTEM FOR THE MANUFACTURE OF METAL BANDS AND SHEETS WITHOUT CONTINUITY SOLUTION BETWEEN THE FOUNDATION IN CONTINUOUS AND LAMINATING. |
| WO2007010564A1 (en) | 2005-07-19 | 2007-01-25 | Giovanni Arvedi | Process and plant for manufacturing steel plates without interruption |
| PL1909980T3 (en) | 2005-07-19 | 2010-02-26 | Giovanni Arvedi | Process and related plant for manufacturing steel long products without interruption |
| EP2321075B1 (en) * | 2008-08-06 | 2018-07-11 | SMS group GmbH | Strand casting mold for liquid metal, particularly for liquid steel |
| ITMI20112292A1 (en) | 2011-12-16 | 2013-06-17 | Arvedi Steel Engineering S P A | SUPPORT AND OSCILLATION DEVICE FOR LINGOTTER IN CONTINUOUS CASTING SYSTEMS |
| IT202000016120A1 (en) | 2020-07-03 | 2022-01-03 | Arvedi Steel Eng S P A | PLANT AND PROCEDURE FOR THE CONTINUOUS PRODUCTION OF HOT ROLLED ULTRA-THIN STEEL STRIPS |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1049698A (en) * | 1964-05-05 | 1966-11-30 | British Iron Steel Research | Improvements in or relating to the manufacture of elongate articles |
| DE1558376A1 (en) * | 1967-04-15 | 1970-03-19 | Vnii Pk I Metall Maschino | Mold |
| FR2055784A1 (en) * | 1969-08-18 | 1971-04-30 | Ural Z Tyaznlloco | Mould rocking mechanism in continuous metal - casting plants |
| JPS60247451A (en) * | 1984-05-22 | 1985-12-07 | Kawasaki Steel Corp | Method and device for following up molten metal surface in continuous casting mold |
| JPH0763825B2 (en) * | 1985-08-20 | 1995-07-12 | 住友重機械工業株式会社 | Oscillation device for continuous casting machine |
| DE4142447C3 (en) * | 1991-06-21 | 1999-09-09 | Mannesmann Ag | Immersion nozzle - thin slab |
| DE4341719C2 (en) * | 1993-12-03 | 2001-02-01 | Mannesmann Ag | Device for the continuous casting of steel |
| DE4436990C1 (en) * | 1994-10-07 | 1995-12-07 | Mannesmann Ag | Immersed pouring pipe where the outer wall acts as a spacer |
-
1996
- 1996-11-12 IT IT96MI002336A patent/IT1287156B1/en active IP Right Grant
-
1997
- 1997-10-28 ZA ZA9709675A patent/ZA979675B/en unknown
- 1997-11-12 CN CN97199628A patent/CN1072535C/en not_active Expired - Lifetime
- 1997-11-12 AT AT97946036T patent/ATE211416T1/en active
- 1997-11-12 ES ES97946036T patent/ES2169436T3/en not_active Expired - Lifetime
- 1997-11-12 KR KR1019997004166A patent/KR100539994B1/en not_active IP Right Cessation
- 1997-11-12 RU RU99113037/02A patent/RU2195384C2/en active
- 1997-11-12 JP JP52236098A patent/JP3974186B2/en not_active Expired - Lifetime
- 1997-11-12 BR BR9713007-9A patent/BR9713007A/en not_active IP Right Cessation
- 1997-11-12 WO PCT/IT1997/000276 patent/WO1998020997A1/en active IP Right Grant
- 1997-11-12 EP EP97946036A patent/EP0946316B1/en not_active Expired - Lifetime
- 1997-11-12 AU AU51338/98A patent/AU718124B2/en not_active Expired
- 1997-11-12 CA CA002269130A patent/CA2269130C/en not_active Expired - Lifetime
- 1997-11-12 DE DE69709899T patent/DE69709899T2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264490A (en) * | 2008-12-25 | 2011-11-30 | 住友金属工业株式会社 | Method of continuous steel casting |
| CN102264490B (en) * | 2008-12-25 | 2013-01-09 | 住友金属工业株式会社 | Method of continuous steel casting |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69709899T2 (en) | 2002-06-27 |
| JP2001504037A (en) | 2001-03-27 |
| CN1072535C (en) | 2001-10-10 |
| ITMI962336A0 (en) | 1996-11-12 |
| CA2269130A1 (en) | 1998-05-22 |
| DE69709899D1 (en) | 2002-02-28 |
| CA2269130C (en) | 2006-10-10 |
| ZA979675B (en) | 1998-05-21 |
| BR9713007A (en) | 2000-01-25 |
| EP0946316B1 (en) | 2002-01-02 |
| ES2169436T3 (en) | 2002-07-01 |
| ATE211416T1 (en) | 2002-01-15 |
| IT1287156B1 (en) | 1998-08-04 |
| ITMI962336A1 (en) | 1998-05-12 |
| KR100539994B1 (en) | 2006-01-10 |
| EP0946316A1 (en) | 1999-10-06 |
| AU5133898A (en) | 1998-06-03 |
| RU2195384C2 (en) | 2002-12-27 |
| AU718124B2 (en) | 2000-04-06 |
| KR20000053199A (en) | 2000-08-25 |
| WO1998020997A1 (en) | 1998-05-22 |
| JP3974186B2 (en) | 2007-09-12 |
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