CN110315049A - A kind of continuous casting secondary cooling water control device and method - Google Patents
A kind of continuous casting secondary cooling water control device and method Download PDFInfo
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- CN110315049A CN110315049A CN201910678458.5A CN201910678458A CN110315049A CN 110315049 A CN110315049 A CN 110315049A CN 201910678458 A CN201910678458 A CN 201910678458A CN 110315049 A CN110315049 A CN 110315049A
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- temperature
- water
- surface temperature
- continuous casting
- slab
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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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
Abstract
The invention belongs to metallurgical technology fields, it is related to a kind of continuous casting secondary cooling water control device and method, including the nip rolls for clamping slab, and the nozzle of slab side is set, it further include the flowmeter for counting and controlling nozzle water, generate water signal, for measuring the temperature sensor of slab temperature, generate temperature signal, coordinated control is carried out to water signal by the variation of temperature signal, under the premise of not increasing cost, by controlling secondary cooling water, so that the variance and minimum of casting blank surface temperature and target surface temperature, to achieve the purpose that control takes into account that casting blank surface temperature is risen again and cooling zone outlet temperature is in the reasonable scope out, to be effectively improved the quality of slab.
Description
Technical field
The invention belongs to metallurgical technology fields, are related to a kind of continuous casting secondary cooling water control device and method.
Background technique
Continuous casting be steel production in an important ring, main process be high temperature molten steel inside crystallizer cooling zone by
The strong cold slab for forming certain thickness green shell, being come out from crystallizer cooling zone, into after secondary cooling zone, in shower water
It is strong it is cold under, continue to cool until internal molten steel solidifies completely.In the cooling procedure of slab, the cooling schematic diagram of continuous casting is as schemed
Shown in 2, slab takes away about 15% total amount of heat with nip rolls heat transfer；Casting billet surface radiant heat transfer takes away about 25% total amount of heat；
About 40% total amount of heat is taken away in shower water cooling；Cooling water evaporation takes away about 20% total amount of heat, it can be seen that cooling water passes through
Different modes takes away about 60% total amount of heat, and therefore, the size of water spray has decisive role, and final shadow to solidification
Ring the quality of slab.
Currently, continuous casting water spray control method is more, such as based on pulling rate-water proportional controlling means, based on effectively drawing
Pulling rate-water proportional controlling means of speed, the target surface temperature method based on field measurement temperature feedback, based on calculating temperature feedback
Target surface temperature method.
It in the above-mentioned methods, is current most widely used method based on the target surface temperature method for calculating temperature feedback.
This method is usually to set the temperature of cooling zone outlet as target temperature, in casting process, to calculate slab temperature cold
But area outlet carries out secondary cooling water control for the purpose of reaching target temperature.Also there is the flat of the casting blank surface temperature that entire cooling zone is added
Method of the mean value as controlling elements.But the above method all has a problem that, is exactly surface after slab enters next cooling zone
Temperature, which is risen again, to be effectively controlled, if it is excessively high to rise again, the requirement that metallurgical criteria rises again to slab is violated, to generate quality
Defect.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of continuous casting two cold water controling methods, before not increasing cost
It puts, by controlling secondary cooling water, so that the variance and minimum of casting blank surface temperature and target surface temperature, to be effectively improved casting
The quality of base.
In order to achieve the above objectives, the invention provides the following technical scheme:
A kind of continuous casting two cold water controling method, comprising the following steps: the casting in S1 record at least two adjacent control period
Base surface temperature and secondary coolingwater；S2 carries out feedback control to secondary coolingwater by the statistical variations of casting blank surface temperature.
Optionally, the casting blank surface temperature in step S1 is using the method acquisition of measurement or using meter by the way of numerical simulation
It calculates.
Optionally, step S1 includes: the target surface temperature that slab respective nodes position is calculatedWith it is currently practical
TemperatureWherein i is the positive integer terminated since 0 to k
Optionally, step S2 includes: the casting blank surface temperature and target that S2.1 calculated at least two adjacent control periods
The variance and s of surface temperaturen-2、sn-1；And the secondary coolingwater deviation in nearly two periods
If S2.2 sn-2>sn-1ThenGo to step S1；If sn-2≤sn-1, then Qn=Qn-1.:
Optionally, sn-2、sn-1Calculation formula are as follows:
A kind of continuous casting two cold water controller, using above-mentioned continuous casting two cold water controling method, including for clamping slab
Nip rolls and the nozzle that slab side is arranged in further include the flowmeter for counting and controlling nozzle water, generate water letter
Number, the temperature sensor for measuring slab temperature, generate temperature signal.
It optionally, further include the memory being electrical connected, calculator, controller；Water signal is deposited by timing typing is generated
Reservoir；Temperature signal is conveyed to calculator by generation timing typing memory, by believing with timing water semaphore temperature
Number calculate the casting blank surface temperatures at least two adjacent control periods and the variance of target surface temperature and；It will then calculate and tie
Fruit and water signal are conveyed to controller, and controller carries out feedback regulation to nozzle water after carrying out logic judgment.
The beneficial effects of the present invention are:
The present invention by the control to secondary coolingwater, can make the variance and most of casting blank surface temperature and target surface temperature
It is small, to achieve the purpose that control takes into account that casting blank surface temperature is risen again and cooling zone outlet temperature in the reasonable scope, effectively changes out
The quality of kind slab.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target of the invention and other advantages can be realized by following specification and
It obtains.
Detailed description of the invention
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing excellent
The detailed description of choosing, in which:
Fig. 1 is conticaster technical process schematic diagram；
Fig. 2 is heat transfer type schematic diagram of the invention；
Fig. 3 is new algorithm figure compared with algorithm in the prior art；
Fig. 4 is that slab is sliced node temperature and target surface temperature schematic diagram.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that diagram provided in following embodiment is only to show
Meaning mode illustrates basic conception of the invention, and in the absence of conflict, the feature in following embodiment and embodiment can phase
Mutually combination.
Wherein, the drawings are for illustrative purposes only and are merely schematic diagrams, rather than pictorial diagram, should not be understood as to this
The limitation of invention；Embodiment in order to better illustrate the present invention, the certain components of attached drawing have omission, zoom in or out, not
Represent the size of actual product；It will be understood by those skilled in the art that certain known features and its explanation may be omitted and be in attached drawing
It is understood that.
The same or similar label correspond to the same or similar components in the attached drawing of the embodiment of the present invention；It is retouched in of the invention
In stating, it is to be understood that if there is the orientation or positional relationship of the instructions such as term " on ", "lower", "left", "right", "front", "rear"
To be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description of the present invention and simplification of the description, rather than indicate or
It implies that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore is described in attached drawing
The term of positional relationship only for illustration, is not considered as limiting the invention, for the ordinary skill of this field
For personnel, the concrete meaning of above-mentioned term can be understood as the case may be.
Fig. 1-Fig. 4 is please referred to, the element numbers in attached drawing respectively indicate: nip rolls 1, nozzle 2.
The present invention is applicable in all slab casters, and the present invention relates to a kind of continuous casting two cold water controllers, including for pressing from both sides
It holds the nip rolls 1 of slab and the nozzle 2 of slab side is set, further include the flow for counting and controlling 2 water of nozzle
Meter generates water signal, the temperature sensor for measuring slab temperature, generates temperature signal.
It optionally, further include the memory being electrical connected, calculator, controller；Water signal is deposited by timing typing is generated
Reservoir；Temperature signal is conveyed to calculator by generation timing typing memory, by believing with timing water semaphore temperature
Number calculate the casting blank surface temperatures at least two adjacent control periods and the variance of target surface temperature and；It will then calculate and tie
Fruit and water signal are conveyed to controller, and controller carries out feedback regulation to 2 water of nozzle after carrying out logic judgment.
It is specific as follows the present invention relates to a kind of continuous casting two cold water controling method: to record the slab table in nearly two control periods
Face temperature and secondary coolingwater；
S1 calculates the side of the calculating casting blank surface temperature and target surface temperature in nearly two periods according to recorded data
Difference and respectively sn-2And sn-1And the secondary coolingwater deviation in nearly two periods
If S2 sn-2>sn-1ThenGo to step S1；If sn-2≤sn-1, then Qn=Qn-1；
The present invention is by controlling secondary cooling water, so that the variance and minimum of casting blank surface temperature and target surface temperature, to reach
It takes into account casting blank surface temperature to control to rise again and the purpose of cooling zone outlet temperature in the reasonable scope out, to be effectively improved casting
The quality of base.
It is illustrated below by specific embodiment:
Certain steel mill's conticaster, shares N number of secondary cooling zone, implementation steps of the present embodiment in each secondary cooling zone be it is identical,
Therefore, two cold 3rd area are only chosen herein to be described in detail, specific as follows:
1) the casting billet surface node temperature (as shown in figure nip rolls 4) and secondary coolingwater for recording nearly two control periods, such as table 1
It is shown；
1 process record table of table
2) according to recorded data, the side of the calculating casting blank surface temperature and target surface temperature in nearly two periods is calculated
Difference and sn-2/sn-1/ and nearly two periods secondary coolingwater deviationResult data is as shown in table 2；
sn-2=(998-998)2+(997-1015)2+(996-1010)2+(995-1006)2+(994-1003)2+(993-
1000)2+(992-997)2+(991-995)2+(990-993)2
sn-1=(998-998)2+(997-1012)2+(996-1007)2+(995-1003)2+(994-1000)2+(993-
997)2+(992-994)2+(991-992)2+(990-990)2
2 calculated result of table
3) due to the s in step 2)n-2>sn-1, therefore, the setting water Q of next stepn=265+8=273l/min, then
It gos to step 1) until sn-2≤sn-1When, water remains unchanged.
Originally slab will appear transverse crack once in a while in production process, and after the algorithm, casting billet surface transverse crack defect is obtained
Very big improvement is arrived.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Scope of the claims in.
Claims (7)
1. a kind of continuous casting two cold water controling method, which comprises the following steps:
The casting blank surface temperature and secondary coolingwater in S1 record at least two adjacent control period；
S2 carries out feedback control to secondary coolingwater by the statistical variations of casting blank surface temperature.
2. continuous casting two cold water controling method as described in claim 1, which is characterized in that the casting blank surface temperature in step S1
Method using measurement calculates by the way of acquiring or using numerical simulation.
3. continuous casting two cold water controling method as described in claim 1, which is characterized in that step S1 includes: that casting is calculated
The target surface temperature of base respective nodes positionAnd current actual temperatureWherein i is just whole to terminate since 0 to k
Number.
4. continuous casting two cold water controling method as described in claim 3, which is characterized in that
Step S2 includes:
S2.1 calculates the casting blank surface temperature at least two adjacent control periods and the variance and s of target surface temperaturen-2、
sn-1；And the secondary coolingwater deviation in nearly two periods,
If S2.2 sn-2>sn-1ThenGo to step S1；If sn-2≤sn-1, then Qn=Qn-1。
5. continuous casting two cold water controling method as described in claim 4, which is characterized in that sn-2、sn-1Calculation formula are as follows:
6. a kind of continuous casting two cold water controller, using the continuous casting secondary cooling water controlling party as described in any one of Claims 1 to 4
Method, it is characterised in that: including the nip rolls for clamping slab and the nozzle of slab side is set, further includes for counting
And the flowmeter of control nozzle water, water signal, the temperature sensor for measuring slab temperature are generated, temperature letter is generated
Number.
7. continuous casting two cold water controller as described in claim 6, it is characterised in that: further include the storage being electrical connected
Device, calculator, controller；Water signal is by generation timing typing memory；Temperature signal, which is pressed, generates timing typing memory, and
It is conveyed to calculator, by the slab table for calculating at least two adjacent control periods with timing water semaphore temperature signal
Face temperature and the variance of target surface temperature and；Calculated result and water signal are then conveyed to controller, controller carries out
Feedback regulation is carried out to nozzle water after logic judgment.
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| CN201910678458.5A CN110315049B (en) | 2019-07-25 | 2019-07-25 | Continuous casting secondary cooling water control device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110802208A (en) * | 2019-11-13 | 2020-02-18 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for adjusting water yield of continuous casting production in high-latitude area |
| CN113198996A (en) * | 2021-04-30 | 2021-08-03 | 北京科技大学 | Secondary cooling water amount configuration method based on continuous casting billet surface temperature return control |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110802208A (en) * | 2019-11-13 | 2020-02-18 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for adjusting water yield of continuous casting production in high-latitude area |
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| CN113198996B (en) * | 2021-04-30 | 2022-04-05 | 北京科技大学 | Secondary cooling water amount configuration method based on continuous casting billet surface temperature return control |
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