CN1753735A - Method for regulating the temperature of a metal strip, especially in a cooling path - Google Patents
Method for regulating the temperature of a metal strip, especially in a cooling path Download PDFInfo
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- CN1753735A CN1753735A CN 200480005100 CN200480005100A CN1753735A CN 1753735 A CN1753735 A CN 1753735A CN 200480005100 CN200480005100 CN 200480005100 CN 200480005100 A CN200480005100 A CN 200480005100A CN 1753735 A CN1753735 A CN 1753735A
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- cooling section
- temperature
- metal tape
- object function
- optimization problem
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- 238000001816 cooling Methods 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000002184 metal Substances 0.000 title claims abstract description 43
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 16
- 230000008859 change Effects 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 20
- 230000033001 locomotion Effects 0.000 claims description 19
- 238000004364 calculation method Methods 0.000 claims description 16
- 238000005457 optimization Methods 0.000 claims description 15
- 238000005098 hot rolling Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 6
- 230000001276 controlling effect Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 6
- 239000002826 coolant Substances 0.000 description 5
- 230000002277 temperature effect Effects 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012804 iterative process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Control Of Heat Treatment Processes (AREA)
Abstract
The present invention relates to a method for controlling or regulating the temperature of a metal strip, especially in a cooling path (4) of heat rolling device. In order to conform the regulation signal of the cooling path (4), comparing the change process of the rating temperature and the practice temperature, and to compose at least a object function of the regulation institution using for cooling path (4) under the case of considering the assistant condition, as well as taking this object function as twice optimum problems to solve in order to adjust the model forecast formula. This invention advises to regulate overlapping the finishing train and the cooling path of the heat rolling device.
Description
The present invention relates to a kind of in the equipment of steel industry, especially in the cooling section in the mill train downstream that is located at rolled metal hot rolling band, control or regulate the metal tape method of temperature.
By the known a kind of control method that is used for cooling section of DE 19963186A1, be provided with the finishing mill line of a rolled metal hot rolling band in the cooling section upstream.By this control method, when being brought in the cooling section, hot rolling detects band point and initial temperature thereof, and the band point regulation rated temperature change procedure separately for detecting.Band point, its initial temperature with and model that is used for cooling section of rated temperature change procedure input.Stroke is followed the trail of these band points by cooling section the time.In cooling section, the hot rolling band suffers temperature effect by the temperature effect device.Stroke is followed the trail of and the described model of the same input of temperature effect.This model is determined the actual temperature of detected band point expectation in real time, and gives these band points with it.Provide temperature to each band point constantly at each thus as the function of relevant tape thickness.In addition, by being the rated temperature change procedure of detected band point regulation and the actual temperature of expectation, be identified for the controlling value of temperature effect device and this controlling value input temp is influenced device.This temperature control is particularly useful on purpose adjusting the material behavior and the metallographic structure characteristic of metal hot rolling band.Typical temperature is controlled at here and implements by this way, that is, reach at the predetermined coiling temperature change procedure of cooling section outlet as well as possiblely.
Play a decisive role for the material behavior of metal tape and metallographic structure characteristic, except the parameter of chemical composition and forming process, for example be by equipment the time carrying material along the compression distributing point of the support in finish rolling stage and temperature changing process in time.
Be used for last several governor motions of metal tape variations in temperature at device interior, be in cooling section inside here usually.In cooling section, carry out the transformation mutually of material toward contact.Usually the valve of cooling section is as governor motion.For some cooling section, heavy plate mill for example additionally can also the instrumentality materials flow, that is belt speed especially.
The objective of the invention is, in the equipment of steel industry, especially in cooling section, metal tape temperature controlling or adjusting improve, and reach the shortcoming of control or the adjusting of avoiding known basically, and the efficient that improves control or regulate.
This purpose by a kind of in the equipment of steel industry, especially in the cooling section in the mill train downstream that is located at rolled metal hot rolling band, be used for control and/or regulate the metal tape method of temperature reaching, wherein, in order to determine conditioning signal one a rated temperature change procedure and an actual temperature change process are made comparisons, and, be used for the governor motion of described equipment, the object function in cooling section especially considering to constitute under the situation of subsidiary conditions at least one.
By considering preferably to be equivalent to the subsidiary conditions of the equipment limit or accommodation limit, can be especially at different cooling section layouts with especially determine (adjusting) setting at a kind of situation of temperature changing process or cooling procedure of having stipulated, they have reasonably considered accommodation limit.For example, in a cooling section divided into two parts, avoided the too high temperature of regulation between two cooling segmentations, otherwise can cause no longer reaching coiling temperature by second operational amount of coolant of cooling segmentation.
Advantageously make object function minimize or maximize by the solving-optimizing problem.Therefore also can when variations in temperature that can not realize exactly stipulating or cooling procedure, implement control or adjusting.So this method is determined approximation as well as possible.
Advantageously, find the solution the double optimization problem.Therefore obviously shortened the time that is used for the solving-optimizing problem usually.
Advantageously, determine the actual temperature change process and/or the rated temperature change procedure of metal tape by at least one model, therefore, even especially cooling section for control or when regulating important place energy measurement not being with temperature really, also can realize a kind of better strip temperature control or regulate.
Mode is determined actual enthalpy change process and/or specified enthalpy change process as an alternative or supplement.
Advantageously, model is carried out online adaptive.Can for example consider that in this way the equipment that exists moves (Anlagendrift), and the result who gears to actual circumstances that can determine to be particularly useful for follow-up metal tape.
Advantageously, stroke is followed the trail of the band point.
Advantageously, determine the temperature changing process of each band point of metal tape.Follow the trail of the precision that significantly improves control or regulate by the stroke of band point by this way and also.
Advantageously make object function minimize or maximize by calculating in advance by the solving-optimizing problem.Especially significantly shortened in this way and be used for the needed time of governor motion preset adjustment.In addition, thus preferably aspect follow-up online adjusting best preset governor motion.
Advantageously, preferably onlinely make object function minimize or maximize iteratively by the solving-optimizing problem.
In claim 10 to 14, provide the favourable expansion design of the inventive method.
Other solutions to achieve the object of the present invention in claim 15 to 18, have been provided.
By below in conjunction with providing other advantages of the present invention and details in the explanation of accompanying drawing to various embodiments of the present invention.As example wherein:
Fig. 1 represents the principle structure of a milling train;
Fig. 2 represents cooling section and calculation element that is used for its control or adjusting of a milling train;
Fig. 3 represents a cooling section and the cooling section adjusting device that schematically shows corresponding with it;
Fig. 4 represents the possible module of a cooling section adjusting device;
Fig. 5 represents calculation element in advance and real-time regulating apparatus of a cooling section; And
Fig. 6 is illustrated in the possible temperature changing process of a metal tape in the cooling section.
Fig. 1 represents to produce the equipment of metal tape 6, and this equipment comprises a roughing train 2, a finishing mill line 3 and a cooling section 4.Metal tape 6 here preferably hot rolling make.Preferably establish a coiling machine 5 in cooling section 4 back.Batch metal tape 6 rolling and cooling in cooling section 4 in mill train 2 and 3 by coiling machine 5.Mill train 2 or 3 provided upstream, one band source 1.This band source 1 for example is designed to the stove of heating of metal slab therein.This band source 1 for example also can be designed as the continuous ingot-casting device of making metal tape 6 therein, then metal tape 6 is sent to roughing train 2.
Be used for the equipment of STEELMAKING PRODUCTION and especially mill train 2,3 and cooling section 4 and at least one coiling machine 5 control by a kind of control method, the method is implemented by calculation element 10.For this reason, one or more parts 1 of calculation element 10 and STEELMAKING PRODUCTION equipment are connected with control technology to 5.Control program that is designed to computer program of calculation element 10 usefulness carries out programme-control, and it implements to be used for control or to regulate band 6 method of temperature according to of the present invention based on this program.
Press Fig. 1, metal tape or slab 6 leave the import thickness that at first is rolled down to a corresponding finishing mill line 3 behind the band source 1 in roughing train 2.Then, be with 6 in finishing mill line inside by its final thickness of mill stand 3 ' be rolled down to.The coiling temperature that ensuing cooling section 4 is cooled to metal tape to stipulate.
In order to guarantee that metal tape 6 has the mechanical property of expectation, finishing mill line 3 and cooling section 4 must be observed appropriate temperature changing process.For this reason, preferably according to the concrete order of device type for example, operational mode, metal tape 6 and the specified temperature changing process of property regulation of expectation.
Fig. 5 represents that one is used to control the calculation element 10 of cooling section 4.Here this calculation element 10 has one computing module 21 and one especially is used for preferably module 22 in line computation in cooling procedure in advance.
Can carry out initialization to the governor motion of finishing mill line 4 by computing module 21 in advance.Utilize for example predicted value when not having measured value, for example metal tape inlet velocity, metal tape are in the temperature and the tape thickness of finishing mill line 3 terminal points for this reason.For example the material data 105 of expectation is used as the input value of computing module 21 aspect the operator in advance.
Calculation element in advance 20 in computing module 21 inside is in advance implemented iterative process.This means to calculate to repeat, until the error minimize that makes regulation with different amount of coolant.Therefore calculation element 20 is connected with adaptation device 18 with cooling section monitor 11 that can be online in advance.
Computing module 22 has a cooling section monitor 11 and a cooling section adjusting device 12, and they are connected to each other.The governor motion of cooling section monitor 11 and cooling section adjusting device 12 control cooling sections 4, and preferably with for example can be stored in a model library 19 in one or more models of cooling section be connected.Preferably one of them model is used for controlling to adjust mechanism.Cooling section adjusting device 12 transmits conditioning signal 101 to cooling section 4, for example is the adjusting pattern of cooling agent valve in form.
Fig. 2 illustrates the working method of cooling section monitor 11 and cooling section adjusting device 12 more accurately.
Cooling section monitor 11 is determined the state of cooling section 4.Input parameter as cooling section monitor 11 for example is speed, metal tape temperature and coolant temperature and the coolant pressure equivalence of metal tape 6.
The adjusting parameter of governor motion is other input parameters, that is is preferably the position of valve 7.
Preferably, establish a final rolling temperature test desk 8, be used to measure the temperature of metal tape 6 at cooling section 4 entrance regions.Measure metal tape temperature or the temperature between finishing mill line 3 and cooling section 4 here at finishing mill line 3 ends.Preferably establish a final temperature test desk 9 at the end of cooling section 4.Measure before the coiling machine 5 here or the temperature of cooling section 4 end.The input parameter of cooling section monitor 11 be the inlet temperature 103 of the metal tape determined at final rolling temperature test desk 8 places, the metal tape outlet temperature of determining at coiling temperature test desk 9 places 104 and other preferably in finishing mill line 3, for example its last mill stand 3 ' locate or its last mill stand 3 ' after the data 102 of the metal tape nearby determined.
To cooling section monitor 11 transmission valve position values 101, but they be can't help cooling section monitor 11 usually and check confidence levels by cooling section adjusting device 12.Cooling section monitor 11 is constantly determined cooling section 4 current states.
Preferably carry out according to regulating step according to control of the present invention or adjusting in the mode of time beat.Cooling section adjusting device 12 is calculated the valve position value 101 of the valve 7 of the cooling section 4 that is used for each next regulating step.Preferably separate optimization problem here, hereinafter also will describe in detail this.
Preferably in each time beat, implement an iterative step according to the present invention, wherein, from the separating of the optimization problem of the corresponding configuration of current time beat, at least one conditioning signal is supplied with described equipment.Preferably, consider the measured value that other are real when the solving-optimizing problem for next time beat.Therefore can constitute the regulating loop of a closure.
As for cooling section 4 be typical like that, when setting up preferably the double optimization problem, governor motions refer in a large number be not single valve but in groups valve as governor motion, be favourable.The distribution of the regulated value of calculating on each valve undertaken by appropriate switch heuristic (Schatheuristik).Valve is combined as the valve group especially for online, that is the solving-optimizing problem of carrying out in real time is particularly advantageous.
Fig. 6 represents a kind of possible variations in temperature T of the place X of relevant cooling section 4, and wherein cooling section 4 is with cooling section top X
AWith cooling section terminal X
EBe the boundary.When describe that be that temperature draws during T over time is similar figure.
Fig. 3 at length expresses the model prediction formula of cooling section is regulated.Preferably not single valve 7a of control or 7b (being generically and collectively referred to as 7) here by cooling section adjusting device 12, but the valve group that control is made up of one or more valves 7.In this case correspondingly for example regulatory region 14 be divided into a plurality of subregion 14a and 14b, wherein be preferably each subregion 14a or 14b and set a valve group.
In the boundary of regulatory region 14 (its boundary overlaps with the boundary of cooling section usually), about the adjusting between main regulating area 15 and calibration adjustments district 16 can be different.Preferably stroke is followed the trail of each band point (13a, 13b).
In order to control and regulate cooling section, use a kind of model prediction formula algorithm.Be used for N here,
uThe governor motion of individual time step is defined in and is not used as preferably separating of double optimization problem, wherein uses N
yThe model of individual time step is implemented advance notice.
N
uCan be 1 or also can be natural number greater than 1.Under the sort of in the back situation, only implement the governor motion adjustment of calculating usually at first time step.For next time step, under the situation of considering current measured value or advance notice value, recomputate.
N
yMust select so greatly, so that surmount the longest lag time of existence.The longest lag time is by the ultimate range decision between temperature survey point and the next free adjustment valve that is connected the upstream.In order to set up preferred double optimization problem, utilize an appropriate preferred linearizing band temperature model.Can be in this preferred double optimization problem easily in conjunction with equation or inequality subsidiary conditions.Therefore can advantageous particularly and preferably consider the governor motion limit and different cooling section layouts by this way, that is, feasible needn't be at calculation element 10 or carry out too much change on computing module 21 and/or the computing module 22 in advance.
Mode as an alternative or supplement, the model prediction formula of cooling section is regulated also can be based on the enthalpy change process in the cooling section.Here, about place X or about the enthalpy change process of time with about place (also visible Fig. 6) or similar about the temperature changing process of time.
As Fig. 4 was represented, calculation element 10 can have a module that is used for cooling section adjusting device 12, and itself has a plurality of minutes adjustment module 17a, 17b, and these minutes, adjustment module was corresponding to different regulatory region 14a and 14b.
According to the present invention to the control of cooling section 4 or adjusting and the cooling section layout is irrelevant and regulate based on model prediction and to provide a kind of also in the state of a control of the best at accommodation limit place.Setting can be by flexible way differently balance on preferential meaning.The edge can be covered (Edge-Masking) is combined to described according in control of the present invention or the control method.
Can be designed as the speed that also can control metal tape 6 according to method of the present invention, this also can for example be used in the heavy plate mill method of the present invention.
Especially also can regulate finishing mill line 3 according to the present invention.Except that belt speed, in finishing mill line 3, the intermediate stand cooling device is other possible governor motions.The typical quantity of the governor motion of a cooling section for example is about 200 valves 7.This quantity of governor motion is more much bigger than the quantity that is used for typical finishing mill line 3.
The overlapping control and the adjusting that are used for a plurality of environment divisions 1 to 5 can preferably realize at a finishing mill line 3 and a cooling section 4 explanations as example as following.
For control overlappingly or adjusting, preferably the temperature model of finishing mill line 3 and the temperature model of cooling section 4 are connected.By the object function of superpose two environment divisions 3 and 4, determine preferred double optimization problem with preferred linear subsidiary conditions, provide a kind of common control method that is used for two environment divisions 3 and 4 by it.The optimization of described problem thereby especially provide the adjustment to the intermediate stand cooling device of finishing mill line 3, the cooling section valve 7 of cooling section 4 and the speed of metal tape 6 for next regulating step.
Claims (20)
- One kind in the equipment of steel industry, especially in a cooling section (4) in the mill train that is located at rolled metal hot rolling band (6) (2,3) downstream, be used for control and/or regulate a metal tape (5) method of temperature, wherein, in order to determine that conditioning signal makes comparisons a rated temperature change procedure and an actual temperature change process, it is characterized by: under the situation of considering subsidiary conditions formation at least one be used for the governor motion of described equipment, the object function in described cooling section (4) especially.
- 2. it is characterized by in accordance with the method for claim 1: described object function is minimized by finding the solution an optimization problem.
- 3. according to claim 1 or 2 described methods, it is characterized by: make described object function maximization by finding the solution an optimization problem.
- 4. according to claim 2 or 3 described methods, it is characterized by: find the solution a double optimization problem.
- 5. according to each described method in the claim 1 to 4, it is characterized by: actual temperature change process and/or the rated temperature change procedure of determining described metal tape (6) by at least one model.
- 6. according to each described method in the claim 1 to 5, it is characterized by: determine actual enthalpy change process and/or specified enthalpy change process by at least one model.
- 7. according to claim 5 or 6 described methods, it is characterized by: described model is carried out online adaptive.
- 8. according to each described method in the claim 1 to 7, it is characterized by: stroke is followed the trail of band point (13a, 13b).
- 9. according to each described method in the claim 1 to 8, it is characterized by: determine metal tape (6) respectively with the temperature changing process of point (13a, 13b).
- 10. according to each described method in the claim 2 to 9, it is characterized by: make described object function minimize or maximize by calculating in advance by finding the solution an optimization problem.
- 11., it is characterized by: preferably onlinely make described object function minimize or maximize iteratively by finding the solution an optimization problem according to each described method in the claim 1 to 10.
- 12. in accordance with the method for claim 11, it is characterized by: in each time beat, implement an iterative step, wherein,, provide a conditioning signal to equipment from separating of the optimization problem of giving a current time beat.
- 13. in accordance with the method for claim 12, it is characterized by:, when the solving-optimizing problem, consider other measured values next time beat.
- 14. it is characterized by in accordance with the method for claim 13: constitute a closed loop and adjust the loop.
- 15., it is characterized by: come the solving-optimizing problem with linear subsidiary conditions according to each described method in the claim 1 to 14.
- 16. according to each described method in the claim 1 to 15, it is characterized by: in a plurality of parts (1 to 5) of steel industry equipment, especially at finishing mill line (3) be arranged in the cooling section (4) in its downstream, control and/or regulate described metal tape (5) temperature.
- 17. computer program that is used to implement according to the described method of above-mentioned each claim.
- 18. one kind with the calculation element (10) of programming according to the described computer program of claim 17, it is used to control the cooling section at least (4) of steel industry equipment, and wherein, this calculation element (10) directly and/or affect indirectly the temperature of metal tape (6).
- 19. according to the described calculation element of claim 18 (10), it is characterized by: it has a cooling section monitor (11), one calculation element (20) module, adaptation device (18) module and a cooling section adjusting device (12) module in advance.
- 20. according to claim 18 or 19 described calculation elements (10), it is characterized by: it has a plurality of adjustment modules (17a, 17b), is used to regulate governor motion (7) and/or regulates the regulatory region (14a, 14b) that comprises one or more governor motions.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10308222.0 | 2003-02-25 | ||
| DE10308222 | 2003-02-25 | ||
| DE10321792.4 | 2003-05-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1753735A true CN1753735A (en) | 2006-03-29 |
| CN1329134C CN1329134C (en) | 2007-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200480005097XA Expired - Fee Related CN1329133C (en) | 2003-02-25 | 2004-02-13 | Method for regulating the temperature of a metal strip, especially for rolling a metal hot strip in a finishing train |
| CNB2004800051008A Expired - Lifetime CN1329134C (en) | 2003-02-25 | 2004-02-13 | Method for regulating the temperature of a metal strip, especially in a cooling path |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200480005097XA Expired - Fee Related CN1329133C (en) | 2003-02-25 | 2004-02-13 | Method for regulating the temperature of a metal strip, especially for rolling a metal hot strip in a finishing train |
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| CN (2) | CN1329133C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431726C (en) * | 2006-12-22 | 2008-11-12 | 江苏沙钢集团有限公司 | Strip steel reeling temperature controlling method and device |
| CN102284511A (en) * | 2011-07-28 | 2011-12-21 | 山西太钢不锈钢股份有限公司 | Band steel laminar flow cooling temperature self-adaptive method |
| CN101462126B (en) * | 2007-12-21 | 2011-12-21 | 株式会社日立制作所 | Coiling temperature control apparatus and control method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT509707B1 (en) * | 2010-05-04 | 2011-11-15 | Siemens Vai Metals Tech Gmbh | METHOD FOR HOT ROLLING OF STEEL STRIPS AND HOT ROLLING STRIP |
| EP2386365A1 (en) | 2010-05-06 | 2011-11-16 | Siemens Aktiengesellschaft | Operational method for a finishing train with prediction of transport speed |
| CN102688894B (en) * | 2011-03-23 | 2015-04-01 | 宝山钢铁股份有限公司 | A controlling method for hot rolled strip threading of a continuous mill set |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02169119A (en) * | 1988-12-22 | 1990-06-29 | Toshiba Corp | Method for controlling plate flatness |
| FR2723012A1 (en) * | 1994-08-01 | 1996-02-02 | Mannesmann Ag | METHOD FOR CONTROLLING THE TEMPERATURE WHEN LAMINATING A HOT STRIP |
| JPH09285810A (en) * | 1996-04-25 | 1997-11-04 | Kawasaki Steel Corp | Method for manufacturing h-steel with satisfactory shape |
| DE19639062A1 (en) * | 1996-09-16 | 1998-03-26 | Mannesmann Ag | Model-based process for the controlled cooling of hot strip or heavy plate in a computer-controlled rolling and cooling process |
| DE19717615A1 (en) * | 1997-04-25 | 1998-10-29 | Siemens Ag | Method and device for cooling metals in a steel mill |
| DE19850253A1 (en) * | 1998-10-31 | 2000-05-04 | Schloemann Siemag Ag | Method and system for controlling cooling sections |
| ATE242496T1 (en) * | 1998-12-16 | 2003-06-15 | Voest Alpine Ind Anlagen | METHOD FOR CALCULATING A SCHEDULE |
| CN1156347C (en) * | 2000-06-21 | 2004-07-07 | 中国科学院沈阳金属研究所 | On-line measurement method of internal temp. of rolled plate and its special-purpose system |
-
2004
- 2004-02-13 CN CNB200480005097XA patent/CN1329133C/en not_active Expired - Fee Related
- 2004-02-13 CN CNB2004800051008A patent/CN1329134C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431726C (en) * | 2006-12-22 | 2008-11-12 | 江苏沙钢集团有限公司 | Strip steel reeling temperature controlling method and device |
| CN101462126B (en) * | 2007-12-21 | 2011-12-21 | 株式会社日立制作所 | Coiling temperature control apparatus and control method |
| CN102284511A (en) * | 2011-07-28 | 2011-12-21 | 山西太钢不锈钢股份有限公司 | Band steel laminar flow cooling temperature self-adaptive method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1329133C (en) | 2007-08-01 |
| CN1329134C (en) | 2007-08-01 |
| CN1753734A (en) | 2006-03-29 |
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Effective date of registration: 20160926 Address after: Erlangen Patentee after: Puruite metallurgical technology limited liability company in Germany Address before: Munich, Germany Patentee before: Siemens AG |
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