CN103182491B - A kind of free loops by thin-strip continuous casting control method and device - Google Patents
A kind of free loops by thin-strip continuous casting control method and device Download PDFInfo
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Abstract
The invention discloses a kind of free loops by thin-strip continuous casting control method and device, its device comprises swing guide and drives hydraulic cylinder; Looper height checkout gear, is arranged at outside under swing guide; Swing guide establishes displacement transducer, and looper height checkout gear and displacement transducer are all electrically connected with a kink guide controller; Before loop guiding device is arranged at horizontal feed roller-way, it is the kink guide roller group of alterable curvature and drives hydraulic cylinder accordingly, and kink guide roller group establishes the sensor that can detect kink contacting points position data; Kink guide controller is electrically connected with driving the servo valve of above-mentioned hydraulic cylinder.During the Parameters variation such as the thickness of the present invention in Cast Strip, looper height, the bending radius of the Cast Strip guide-contour of loop guiding device can be regulated, the minimum bending radius making it be greater than can to cause Cast Strip and crack, thus ensure Cast Strip flawless, obtain good casting strip quality.
Description
Technical field
The present invention relates to continuous casting process and equipment, particularly a kind of free loops by thin-strip continuous casting control method and device.
Background technology
Twin-roll thin strip continuous casting technology is the short route metallurgical technology of a kind of advanced person.
As shown in Figure 1, directly molten steel is cast in one to relatively rotate and the chill roll 1a that can cool fast by two, 1b and side seal board 2a, in the molten bath that 2b surrounds, molten steel is cooled in the peripheral surface that chill roll rotates and solidifies, and then form solidified shell and grow then at two chill roll 1a gradually, the minimum place of 1b roll gap gap is pressed together, form casted steel belt 4, casted steel belt 4 to lead kink guide roller 12 and pinch roll 6 via guide plate 5, and at kink guide roller 12 and chill roll 1a, kink 3 is formed between 1b, then strip is rolled into by milling train 7, band steel after rolling is driven by rollgang 8 and cools through spray cooling device 9, send into coiling machine 11 through coiling clamp roller 10 to batch.
In thin strap continuous casting is produced, need to carry out tension free rolling or micro tension milling to obtain high-quality band steel, so, between milling train and casting machine, design remains with the Cast Strip redundant segments (being called free loop herein) of certain length, and the speed being used for cushioning due to casting machine and milling train such as not to mate at the impact to Cast Strip in situation.In typical thin strap continuous casting is produced, the position forming former and later two end points of free loop is usually not contour, if assuming that Cast Strip is inelastic object, only by under the effect of gravity, the kink curve shape that it is formed follows catenary formula (hyperbolic cosine function curve, formula 1) substantially, and it is formed as shown in Figure 2, in figure the minimum point of kink be A (0, a).
In this article, the height H of Cast Strip free loop is defined as kink guide roller 12 and the follow-up roller-way conveying upper plane of casted steel belt and the difference in height of free loop minimum point.
The minimum bending radius that Cast Strip cracks can be caused, calculated by following formula,
Comprehensively above-mentioned two formulas can obtain minimum Cast Strip bending radius r
min:
Wherein: h-Cast Strip thickness, mm.
ρ-Cast Strip bending radius, mm.
σ
bthe strength degree of-material, MPa.
The elastic modelling quantity of E-material, GPa.
Note: formula (2)-(4) are see " mechanics of materials Ι ", and Dan Huizu is outstanding, Higher Education Publishing House.2002，P135。
According to the typical thin band continuous casting technique arrangement shown in Fig. 1, on the one hand, in one end of Cast Strip free loop---the Cast Strip 4 forming kink is larger with the bending radius of loop guiding device 12 contact position.Along with the increase of looper height, Cast Strip increases gradually in loop guiding device 12 tension that place bears, and Cast Strip bending radius herein then can diminish gradually accordingly.If the bending radius r of Cast Strip on guider
abe less than the Cast Strip limit described in formula (4) and allow bending radius r
min, then, the bending stress produced has exceeded the strength degree of material, and strip surface appearance can be caused perpendicular to the transversal crack of Cast Strip direction of advance.
On the other hand, the looper height of Cast Strip increases the bending radius r that also can cause bottom kink
bdiminish, according to formula (4), if the too small Cast Strip that equally also can cause of Cast Strip bending radius herein cracks.
So, in order to avoid causing Cast Strip to crack because bending radius is too small bottom loop guiding device place and kink in casting cycle due to some changes in process parameters, need to meet following formula at the Cast Strip actual flexion radius at above-mentioned two places: r
a> r
minand r
b> r
min.
Based on above-mentioned purpose and thinking, the method and apparatus of following detection and control free loops by thin-strip continuous casting is proposed.
Looper height checkout gear can adopt infrared ray add light sensation battery forms detecting instrument, also can be the kink detecting instrument of CCD form.Here infrared kink detector, its general principle uses Rotary mirror drum scanned infrared line, when the red heat target in its visual field sends infrared ray, mirror drum reflexes to radiation to be measured on battery, optical signal is converted to ranging pulse signal by battery, this pulse signal and the intrinsic reference burst signal of detection system compare and obtain phase difference, produce an analog signal, this pulse signal is directly proportional to scan angle α, can obtain the height of kink according to the distance bottom kink and between detector.Concrete Cleaning Principle is not discussed herein, has set forth similar method and principle in Chinese patent CN201010103388.X and CN201010103389.4.
Summary of the invention
The object of the present invention is to provide a kind of free loops by thin-strip continuous casting control method and device, during the Parameters variation such as the thickness in Cast Strip, looper height, the bending radius of the Cast Strip guide-contour of loop guiding device can be regulated, the minimum bending radius making it be greater than can to cause Cast Strip and crack, thus ensure Cast Strip flawless, obtain good casting strip quality.The present invention is also applicable to detecting and controlling the free loop of hot strip steel.
For achieving the above object, technical scheme of the present invention is:
A kind of free loops by thin-strip continuous casting control method, comprises the steps:
A) setting position sensor on loop guiding device, can detect Cast Strip contacting points position on loop guiding device in real time, this loop guiding device is provided with the guide roller of some arranged parallel, forms the kink guide roller group of alterable curvature;
B) at the casting initial stage, the Cast Strip delivery head that guide roller upper surfaces all on loop guiding device is formed is consistent with subsequent delivery roller-way height, swing guide lifts, flat segments and the loop guiding device of its end keep highly consistent, ensure that Cast Strip is transported to subsequent delivery roller-way by swing guide and loop guiding device smoothly;
C) after Cast Strip enters subsequent handling, the swing guide bottom, loop guiding device drops to its initial target location, and the device rate meanwhile between milling train to coiling machine is less than main frame speed, until Cast Strip free loop is formed and reaches the initial target height value H of setting
0, looper height checkout gear detects the height of Cast Strip free loop; The parameters such as kink contacting points position data, looper height data and Cast Strip thickness that kink guide controller records according to loop guiding device calculate kink curve, and judge the bending radius r of Cast Strip at loop guiding device place according to this curve
awith the bending radius r at kink minimum point place
bwhether be greater than minimum bending radius r
min, be false any one of it, then by regulating looper height or regulating the guiding curvature of loop guiding device to make the two all meet r
a> r
minand r
b> r
minif, wherein two all untenable, then preferentially regulate looper height value;
If d) in casting cycle, looper height does not change, then, keep the bending radius of existing loop guiding device and looper height until end of casting.
Free loops by thin-strip continuous casting control device of the present invention, comprise swing guide and drive hydraulic cylinder, it also comprises, looper height checkout gear, is arranged at outside under swing guide; The driving oil cylinder of described swing guide is provided with displacement transducer, and swing guide has larger crooked radian, and its end is flat segments, consistent with subsequent delivery roller-way height when being raised up to working position on it under hydraulic cylinder effect; Looper height checkout gear and displacement transducer are all electrically connected with a kink guide controller; Loop guiding device, before being arranged at horizontal feed roller-way, it is kink guide roller group, the location roller of a set of alterable curvature and drives hydraulic cylinder composition accordingly, and wherein guide roller group is made up of the guide roller of some arranged parallel; Kink guide roller group establishes the sensor that can detect kink contacting points position; Described kink guide controller and this sensor, the servo valve of the driving hydraulic cylinder of swing guide and kink guide roller group and displacement transducer is driven to be electrically connected.
Further, described kink guide roller group comprises, some guide rollers and the location roller can measuring kink contact position, and guide roller, location roller are arranged side by side, and location roller is arranged at intervals between two guide rollers; Guide roller support end is arranged on rocking arm, and can rotate around own axes, and adjacent guide roller is connected by rocking arm between two rollers, and location roller rotating shaft two ends are connected to rocking arm between this two roller, forms a set of guide roller unit; Adjacent guide roller unit mutually can swing by rocking arm around between roller, thus makes guide roller group outline have transformable guiding radian; Between respective roller, on rocking arm, two rotating shaft ends of adjacent guide roller arrange drive sprocket connection, and wherein a drive sprocket connects a drive motors; Described location roller shaft head establishes sensor or electric power generating motor; At least a set of driving hydraulic cylinder, is connected to above-mentioned with rocking arm between roller; Wherein be installed in bearing block near subsequent delivery roller-way first guide roller rotating shaft two ends, bearing block is arranged at the base be fixed on casting machine basis.
Again, between described each roller, rocking arm connects a set of driving hydraulic cylinder respectively.
Between described driven roller rocking arm hydraulic cylinder after establish displacement transducer, and be electrically connected kink guide controller.
The invention has the advantages that:
1, can the shape of detection zone steel free loop accurately, Cast Strip steel can be made freely to be transitioned on rollgang by the guide plate curvature adjusting free loop low spot place, crackle can not be there is because of causing Cast Strip to bend the excessive surface that causes, and then affect surface quality of casting belt.
2, can adjust the bending curvature at band outlet place in real time according to different looper heights, carry out dynamic adjustments, can meet various working requirement, Technological adaptability is strong.
3, in adjustment of loop process, looper height and speed etc. are closed-loop control, and in the theoretical Controlling model of system, disturbing factor is fewer, and factor is all controlled and be easy to detect and controlled, so the stability of a system is good.
The difference of the present invention and prior art and improvements:
The height detecting kink in rear cover below direct contact type is adopted in Japanese invention JP09308948A and JP4266458, then by the height of the speeds control kink of pinch roll, do not enter in these patents described in the present invention and consider that the bending curvature before kink is transitioned into horizontal segment changes the problem that Cast Strip may be caused to crack, the just looper height stability contorting solved.
Mention a kind of design and using method of strip caster kink director element in US Patent No. 20100000705, namely have a roller diameter in loop guiding device at least between 200 ~ 650mm, and lower than other roller.Declare in literary composition that looper height is by pinch roll speeds control, and the starting point controlling kink be ensure bottom nip point place, kink, kink is less than 0.2% [σ]-0.4% [σ] to the maximum of Cast Strip, three positions stress absolute value sums such as rollgang place.
The present invention and the method difference described in this patent are:
1. be the stress in order to reduce suffered by kink to Cast Strip, rollgang place equally, in the loop guiding device that this patent adopts, the diameter of its first guide roller is between 200 ~ 650mm, and lower than other roller.Without this requirement in the present invention, because for controlling the stress adopting the mode controlling the Cast Strip guide-contour that a series of roller is formed to control Cast Strip and lead when filling in process in the device of Cast Strip stress in the present invention.
2. adopt the methods such as CCD to measure looper height in this patent, and the method and device that detect kink position, Cast Strip are installed in the present invention on loop guiding device, kink shape and position can be determined more accurately, be beneficial to tower-loop control.
3. the loop guiding device in the present invention can On-line sampling system regulate Cast Strip guide-contour, and does not have similar elaboration in this patent.
Accompanying drawing explanation
Fig. 1 is thin band continuous casting technique schematic diagram.
Fig. 2 is looper height detection range schematic diagram of the present invention.
Fig. 3 is loop guiding device casting preliminary work position view in the present invention.
Fig. 4 is loop guiding device casting stabilization sub stage operating position schematic diagram in the present invention.
Fig. 5 is the embodiment of the present invention 1 loop guiding device schematic perspective view.
Fig. 6 is the embodiment of the present invention 1 loop guiding device original state schematic diagram.
Fig. 7 is the embodiment of the present invention 1 loop guiding device working state schematic representation.
Fig. 8 is the control principle schematic diagram of the embodiment of the present invention 2.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
See Fig. 2 ~ Fig. 7, a kind of free loops by thin-strip continuous casting control method of the present invention, comprises the steps:
A, casting the initial stage, swing guide 5 lifts, be located thereon working position, Cast Strip loop guiding device 12 lifts, the Cast Strip delivery head that the roller upper surface keeping them all is formed is consistent with subsequent delivery roller-way height, and the upper surface of swing guide 5 and the least significant end roll surface of Cast Strip loop guiding device 12 are bordered on, and both keeping, the height of connection is consistent, as Fig. 3, Cast Strip can be transported to subsequent delivery roller-way 8 by swing guide and loop guiding device smoothly.
After b, Cast Strip enter subsequent handling, swing guide 5 is rocked to its lower working position.And now Cast Strip loop guiding device 12 slowly drops to its initial target location, meanwhile the device rate at milling train and its rear portion is less than main frame speed, until Cast Strip free loop is formed and reaches the initial target height value H of setting
0, Cast Strip loop guiding device 12 stop motion, as shown in Figure 4.Kink guide controller now 18 by analyzing the detection data of looper height checkout gear 15, the data such as kink contacting points position data that Cast Strip loop guiding device 12 records and Cast Strip thickness, calculate kink curve, and judge the bending radius r of Cast Strip at loop guiding device 12 place according to this curve
awith the bending radius r at kink minimum point place
bwhether be greater than minimum bending radius r
minif, r
a> r
minand r
b> r
minin any one untenable, then by regulating looper height or regulating the guiding curvature of loop guiding device 12 to make the two all meet r
a> r
minand r
b> r
minif, r
a> r
minand r
b> r
minin two all untenable, then preferentially regulate looper height value.
If in c casting cycle, looper height does not change, then, keep the bending radius of existing Cast Strip loop guiding device 12 and looper height until end of casting.
D, be in free loop object height H
0time, the bending radius of Cast Strip at loop guiding device 12 place and kink minimum point place be 1.5 times of Cast Strip minimum bending radius under thickness condition for this reason, i.e. r
a>=1.5r
minand r
b>=1.5r
min.
The bending radius r of above-mentioned Cast Strip loop guiding device 12
brefer to Cast Strip guide-contour that on this device, all roller-ways is formed and the tangent arc curve radius of rollgang level height, radius r as shown in Figure 4
a, when Cast Strip loop guiding device 12 lifts, the bending radius time Cast Strip transport path height that all roller upper surfaces are formed is consistent with subsequent delivery roller-way height is for infinitely great.
Described Cast Strip thickness, between 1.5 ~ 3mm, forms the temperature of kink between 1400 ~ 1200 DEG C.And described free loop is formed at chill roll nip point and between Cast Strip and loop guiding device contact point, looper height H (as Fig. 2) can regulate between 500 ~ 2500mm, looper height H determines the position of described kink minimum point.
See Fig. 2 ~ Fig. 7, free loops by thin-strip continuous casting control device of the present invention, comprise swing guide 5 and drive hydraulic cylinder 16, it also comprises, looper height checkout gear 15, is arranged at swing guide 5 times outsides; The driving hydraulic cylinder 16 of described swing guide 5 is provided with displacement transducer 17, and swing guide 5 has larger crooked radian, and its end is flat segments, highly consistent with subsequent horizontal rollgang 8 when being raised up to working position on it under hydraulic cylinder effect; Looper height checkout gear 15 and displacement transducer 17 are all electrically connected with a kink guide controller 18; Loop guiding device 12, before being arranged at horizontal feed roller-way 8, it is that the kink guide roller group of a set of alterable curvature and the corresponding hydraulic cylinder 127,127 ' that drives form, and wherein guide roller group is made up of the guide roller of some arranged parallel, location roller; Kink guide roller group establishes the sensor that can detect kink contacting points position; Described kink guide controller 18 with this sensor, drive the servo valve 19,20,21 of the driving hydraulic cylinder of swing guide 5 and kink guide roller group 12 and displacement transducer 17 to be electrically connected.
Further, described kink guide roller group comprises, some guide rollers 121,121 ', 121 " and the location roller 122,122 ' of kink contact position can be measured; guide roller 121,121 ', 121 ", location roller 122,122 ' is arranged side by side, location roller 122 (for guide roller 121,121 ' and location roller 122, lower same) is arranged at intervals between two guide rollers 121,121 '; Guide roller support end is arranged on rocking arm 123,123 ', and can rotate around own axes, and adjacent guide roller 121,121 ' is connected by rocking arm between two rollers, and location roller 122 rotating shaft two ends are connected to rocking arm 123 between this two roller, forms a set of guide roller unit; Adjacent guide roller unit mutually can swing by rocking arm around between roller, thus makes guide roller group outline have transformable guiding radian; Between respective roller, on rocking arm, two rotating shaft ends of adjacent guide roller arrange drive sprocket 124,124 ' connection, and wherein a drive sprocket 124 connects a drive motors 125; Described location roller 122 shaft head establishes sensor or electric power generating motor 126 (as 126a ~ 126d); At least a set of driving hydraulic cylinder 127, is connected to above-mentioned with rocking arm between roller; Wherein be installed in bearing block 128 near subsequent delivery roller-way first guide roller 121 rotating shaft two ends, bearing block is arranged at the base be fixed on casting machine basis.
As preferred further, between each roller of the present invention, rocking arm can connect a set of driving hydraulic cylinder respectively, and realizing rocking arm between each roller can independent weave control.
Between described driven roller rocking arm hydraulic cylinder 127 after establish displacement transducer 129, and be electrically connected kink guide controller 18.
In the present embodiment, adopt relatively simple control model, Cast Strip guider only has two operating positions---and level or bending, fixing bending curvature is determined by the mutual position of the spacing restriction of the block between adjacent rocking arm rocking arm.This method is simple, and the operating position of hydraulic cylinder only has two places, and control method ratio is easier to.For casting single Cast Strip thickness, the stable casting condition of looper height is practical.
According to the needs of tower-loop control precision, the Cast Strip kink guide roller group of less than 4 groups and 4 groups in described Cast Strip loop guiding device 12, can be used.In this case example 1, adopt the scheme of 4 groups of Cast Strip kink guide roller groups, wherein power transmission shaft, location roller diameter are between 120 ~ 300mm.
The detection of described detection Cast Strip and loop guiding device 12 contact position adopts electric power generating motor 126, this electric power generating motor 126 is directly connected with location roller 122, roll body is caused to rotate when Cast Strip contacts with location roller, then electric power generating motor generation current signal instruction Cast Strip is through this position, determine Cast Strip approximate location at this point, described loop guiding device is provided with 4 similar electric power generating motor, can be real-time position, Cast Strip detected.
Embodiment 2
See Fig. 8, free loops by thin-strip continuous casting control method of the present invention, comprises the steps:
Kink is set up in a, Cast Strip, swing guide 5 descends working position at the drive lower swing of hydraulic cylinder 16 to it, concrete operating position is detected by displacement transducer 17 and is fed back to kink guide controller 18, and the latter implements the Stroke Control to hydraulic cylinder by servo valve 19.
B, simultaneously, kink checkout gear 15 Real-Time Monitoring looper height, and detected value is gone out to transport to kink guide controller 18, the kink position data that electric power generating motor 126a ~ 126d detects kink guide roller group 12 exports kink guide controller 18 to, and the latter calculates Cast Strip guided bend radius r according to parameters such as current Cast Strip looper height, tape thickness, the position of Cast Strip on guider
awith the Cast Strip bending radius r bottom kink
b, by these two value respectively with Cast Strip minimum bending radius r
mincompare, if do not meet r
a=1.5r
minand r
b=1.5r
min, then Δ r according to the following formula
a=r
a-1.5r
min, Δ r
b=r
b-1.5r
mincalculate radial misalignment amount Δ r
a, Δ r
band above-mentioned departure is converted into position error signal and is transferred to servo valve 20,21, the latter drives hydraulic cylinder 127,127 ' with certain speed action, the position of hydraulic cylinder is undertaken detecting by the displacement transducer 22 and displacement transducer 23 being arranged on its rear portion and is fed back to kink guide controller 18, when the kink curved radius recorded all meets formula r
a=1.5r
minand r
b=1.5r
minafter, hydraulic cylinder 127,127 ' stops action, keeps current looper height.
If looper height does not change in c casting cycle, then, the bending radius of existing Cast Strip loop guiding device 12 is kept until casting terminates.
Claims (6)
1. a free loops by thin-strip continuous casting control method, comprises the steps:
A) setting position sensor on loop guiding device, can detect Cast Strip contacting points position on loop guiding device in real time, this loop guiding device is provided with the guide roller of some arranged parallel, forms the kink guide roller group of alterable curvature;
B) at the casting initial stage, the Cast Strip delivery head that guide roller upper surfaces all on loop guiding device is formed is consistent with subsequent delivery roller-way height, swing guide lifts, flat segments and the loop guiding device of its end keep highly consistent, ensure that Cast Strip is transported to subsequent delivery roller-way by swing guide and loop guiding device smoothly;
C) after Cast Strip enters subsequent handling, the swing guide bottom, loop guiding device drops to its initial target location, and the device rate meanwhile between milling train to coiling machine is less than main frame speed, until Cast Strip free loop is formed and reaches the initial target height value H of setting
0, looper height checkout gear detects the height of Cast Strip free loop; The parameters such as kink contacting points position data, looper height data and Cast Strip thickness that kink guide controller records according to loop guiding device calculate kink curve, and judge the bending radius r of Cast Strip at loop guiding device place according to this curve
awith the bending radius r at kink minimum point place
bwhether be greater than minimum bending radius r
min, be false any one of it, then by regulating looper height or regulating the guiding curvature of loop guiding device to make the two all meet r
a> r
minand r
b> r
minif, wherein two all untenable, then preferentially regulate looper height value;
If d) in casting cycle, looper height does not change, then, keep the bending radius of existing loop guiding device and looper height until end of casting.
2. free loops by thin-strip continuous casting control method as claimed in claim 1, it is characterized in that, Cast Strip is formed after free loop, the bending radius at loop guiding device place and kink minimum point place for this reason under thickness condition 1.5 times of Cast Strip minimum bending radius be minimum control objectives, i.e. r
a>=1.5r
minand r
b>=1.5r
min.
3. free loops by thin-strip continuous casting control device, comprises swing guide and drives hydraulic cylinder, it is characterized in that,
The driving hydraulic cylinder of described swing guide is provided with displacement transducer, and swing guide has larger crooked radian, and its end is flat segments, drive to be raised up to working position on it under hydraulic cylinder effect time consistent with subsequent delivery roller-way height; Also comprise,
Looper height checkout gear, is arranged at outside under swing guide;
Kink guide controller, is electrically connected with looper height checkout gear;
Loop guiding device, before being arranged at horizontal feed roller-way, it is the kink guide roller group of alterable curvature and corresponding drives hydraulic cylinder composition, and wherein guide roller group is made up of the guide roller of some arranged parallel, location roller; Kink guide roller group establishes the sensor that can detect kink contacting points position; Described kink guide controller and this sensor, the servo valve of the driving hydraulic cylinder of swing guide and kink guide roller group and displacement transducer is driven to be electrically connected.
4. free loops by thin-strip continuous casting control device as claimed in claim 3, it is characterized in that, described kink guide roller group comprises,
Some guide rollers and the location roller that kink contact position can be measured, guide roller, location roller are arranged side by side, and location roller is arranged at intervals between two guide rollers; Guide roller support end is arranged on rocking arm, and can rotate around own axes, and adjacent guide roller is connected by rocking arm between two rollers, and location roller rotating shaft two ends are connected to rocking arm between this two roller, forms a set of guide roller unit; Adjacent guide roller unit mutually can swing by rocking arm around between roller, thus makes guide roller group outline have transformable guiding radian; Between respective roller, on rocking arm, two rotating shaft ends of adjacent guide roller arrange drive sprocket connection, and wherein a drive sprocket connects a drive motors;
Described location roller shaft head establishes sensor or electric power generating motor;
At least a set of driving hydraulic cylinder, is connected to rocking arm between above-mentioned two rollers;
Wherein be installed in bearing block near subsequent delivery roller-way first guide roller rotating shaft two ends, bearing block is arranged at the base be fixed on casting machine basis.
5. free loops by thin-strip continuous casting control device as claimed in claim 4, it is characterized in that, between two described rollers, rocking arm connects a set of driving hydraulic cylinder respectively.
6. free loops by thin-strip continuous casting control device as claimed in claim 4, is characterized in that, establish displacement transducer, and be electrically connected kink guide controller after described driving hydraulic cylinder.
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| JPH04266458A (en) * | 1991-02-19 | 1992-09-22 | Nippon Steel Corp | Method for conveying cast strip in twin roll type strip continuous casting |
| CN101219438A (en) * | 2008-01-25 | 2008-07-16 | 广州珠江钢铁有限责任公司 | Hot continuous rolling mill loop control method and used controller |
| WO2010000034A1 (en) * | 2008-07-03 | 2010-01-07 | Bluescope Steel Limited | For continuous strip casting |
| CN102139358A (en) * | 2010-01-29 | 2011-08-03 | 宝山钢铁股份有限公司 | Method for detecting and controlling free loops by thin-strip continuous casting |
| CN102294449A (en) * | 2010-06-25 | 2011-12-28 | 宝山钢铁股份有限公司 | Method for active strip breaking and continuous casting keeping of strip continuous casting |
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