CN1330439C - Control system, computer program product, device and method - Google Patents
Control system, computer program product, device and method Download PDFInfo
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- CN1330439C CN1330439C CNB200380104525XA CN200380104525A CN1330439C CN 1330439 C CN1330439 C CN 1330439C CN B200380104525X A CNB200380104525X A CN B200380104525XA CN 200380104525 A CN200380104525 A CN 200380104525A CN 1330439 C CN1330439 C CN 1330439C
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- 238000004590 computer program Methods 0.000 title claims description 8
- 230000005499 meniscus Effects 0.000 claims abstract description 72
- 229910052751 metal Inorganic materials 0.000 claims abstract description 58
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- 238000005266 casting Methods 0.000 claims abstract description 39
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- 239000011261 inert gas Substances 0.000 claims description 8
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- 229910052782 aluminium Inorganic materials 0.000 description 2
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Abstract
Control system for regulating the flow of liquid metal in a device for casting a metal, comprising detection means to measure a process variable, a control unit to evaluate the data from the detection means and means to automatically vary at least one process parameter in order to optimize casting conditions. The detection means measure a characteristic of the meniscus at least two points on the meniscus instantaneously throughout the casting process.
Description
Technical field
The present invention relates to be used for regulating the control system of liquid metals at the flow of the device of cast metal.Describedly be used for regulating liquid metals and comprise the checkout gear that is used to measure state-variable in the control system of the flow of the device of cast metal, be used to assess control device from the data of described checkout gear, and be used for changing at least one technological parameter automatically so that optimize the device of casting condition, described at least one technological parameter for example is a casting speed, inert gas flow, magnetic field intensity such as the calutron of electromagnetic brake or agitating device, the bloom slab width, the depth of immersion of the import of flooding.
The invention still further relates to the computer program that is used for the cast metal, apparatus and method.
Background of invention
In continuous casting process, motlten metal is imported container (tundish) from ladle at the top of casting device.Then it by flood or freely tapping hole enter the water cooling mould with in check flow, here, the shell of described metal solidifies, and produces the metal continuous cast stream with solid shell and liquid core.In case described shell has enough thickness, described partly solidified strand is entered a series of rolls downwards, so that further extract heat from described strand surface, guarantees described strand roll forming, and solidifies fully simultaneously.When described strand (with casting speed) was discharged, liquid metals was injected into described mould, so that replenish the metal that is taken out with the speed that equates.
In case described strand solidifies fully, it just is straightened, and cut into the length that needs, for example, cut into bloom slab (the long piece of the metal of square-section, chunk, flat), bloom (the long piece of metal with square profile) or billet (similar with bloom, but have less cross section), this depends on the design of continuous casting apparatus.
Slag is used for getting rid of the impurity of described metal, is subjected to environmental oxidation so that prevent described metal, and described metal is carried out heat insulation.Described slag also provides lubrication between the shell of described mold wall and described curing.Described mould is also shaken usually, so that reduce of friction and the adhesion of described curing shell to described mold wall, and well and avoid shell to tear.
At described mould inside, described metal flow is in the side of the wall of curing metal inner loop.When the import that use is flooded, produced the main flow that flows downward along casting direction, and along the upwards mobile secondary flow of described mold wall, secondary flow flows to described meniscus, i.e. the superficial layer of the described liquid metals in described mould.
The described motlten metal that enters described mould carries such as aluminium, and therefore the impurity of the oxide of calcium and iron will inject described mouthful such as the inert gas of argon gas usually, condense so that prevent it and described deposit.These impurity can float to described die surface in described secondary flow process, wherein, they can harmlessly be trapped on the slag layer of described meniscus, after normally in described mould, circulating, perhaps can be by being carried to the bottom of described mould under the main flow direction, and it is positive to be trapped in described curing, causes flaw occurring on the goods of cast metal.
Must control and enter the metal flow of described mould, so that strengthen the floating of described impurity, and avoid entering the turbulent flow that described mould produces downwards owing to impurity is drawn back, wherein, they may be added in the foundry goods.This is normally by applying one or more magnetic fields to entering the liquid metals generation effect of described mould, and the liquid metals generation effect in the described mould is realized.
Can utilize electromagnetic brake (EMBR) to delay to enter the liquid metals of described mould, penetrate described casting strand dearly so that prevent described motlten metal.This has prevented that non-metallic particle and/or gas are inhaled into and are trapped in the strand of curing, and can avoid thermometal interference heat and mass transfer condition during curing, causes the epidermal area fusing of described curing.
Can also use the electronics agitating device to guarantee to have enough transfer of heat to described meniscus, avoiding freezing, and control the flow velocity on the described meniscus, so that from described metal, discharge bubble and inclusion can not produce danger.If the lip-deep flow rate of metal of meniscus is too big, it might tear described slag layer certain some, and the another kind source that therefore produces harmful inclusion is if they are trapped in the described foundry goods.But, if described surface velocity is too low, the powder that is in the described mould on the described meniscus may be cooled to too low temperature, and solidifies, and has reduced its effect thus.
Because the vibrations of described mould, leave described mouthful the change of liquid metals flow and the change of casting speed, the periodic velocity perturbation of metal flow has appearred in described mould.This velocity perturbation has produced pressure and height fluctuation on described meniscus, it may cause slag to be discharged into the bottom of described mould, form uneven slag thickness and have and form the danger of chapping, therefore, the speed of the metal flow on the described meniscus all is important for the delay of the eliminating of impurity and pulverized slag, and is therefore relevant with the quality of described foundry goods.EP0707909 has disclosed for continuous casting process, the flow velocity v on the described meniscus
mShould remain on 0.2-0.4ms
-1Scope in.But, v
mBe difficult to directly measure.
US6494249 has disclosed a kind of being used for continuously or the method for semi-continuous casting metal, wherein, monitor the speed of described secondary flow, so that when the change that detects described secondary flow, the information conveyance of relevant described detected variation is arrived control device, here described change is assessed, and adjusted the magnetic induction density of the electromagnetic brake of casting device, so that keep or adjust described flow velocity.This method is based on following hypothesis, i.e. flow velocity v on meniscus
mIt is the function of secondary flow upwards.
US6494249 has disclosed the speed of the secondary flow that makes progress on one of described mould side, can be by the height of monitoring standing wave, position and/or shape are monitored, and described standing wave is to produce on the meniscus of one of described mould side by the secondary flow that upwards flows.When detecting variation, described variation is assessed, and regulated magnetic induction intensity according to this assessment.
The defective of this method is to monitor standing wave within a certain period of time, so that change detected, then, the information that expression can have been taken place already change is imported described control device.During described monitoring, the vibrations of described mould may influence the height of described standing wave, shape and position, and therefore the precision of monitoring is caused negative effect.
In addition, US6494249 has disclosed the purposes that electromagnetic induction sensor is used to monitor described standing wave.Electromagnetic induction sensor is to carry out work by the variation that detects sensor coil impedance (active or counteractive), and it changes according to the change of the distance between described cell winding and the conductive material.Coil by the current drives that changes in time produces magnetic field around described cell winding.When ferromagnetic material was imported this magnetic field, because the high osmosis of described ferromagnetic material, the induction reactance of described coil can strengthen usually.Based on the problem relevant with using sensor of electromagnetic induction is that they may experience interference such as the calutron of EMBR or agitating device, and described calutron is generally used on the casting device, and this interference may influence the precision of described sensor.
Summary of the invention
The purpose of this invention is to provide a kind of online regulation and control in the metal casting technique process, so that therefore control and optimization casting condition provide the foundry goods with minimum flaw with productivity identical or that improve to technological parameter.
Above-mentioned and other purposes of the present invention realize by control system.Described control system comprises checkout gear, as induction, optics, radioactivity or heat sensor so that measure state-variable, are used to assess the control device from the data of described checkout gear, and the device that is used for changing automatically at least a technological parameter, as casting speed, inert gas flow, or such as the magnetic field intensity of the calutron of EMBR or agitating device, the bloom slab width, the depth of immersion of the import of flooding, or the angle of the import of flooding are so that optimize casting condition.Described detection means measure state-variable, as when the casting technique as described in the feature of meniscus as described in moment is measured at least two points of meniscus.
According to a preferred embodiment of the invention a, the feature of the meniscus of described mensuration is the height of meniscus, and the difference in height between two points, or the mean value in analysis time or space, and the flow velocity (v of motlten metal at described meniscus place is used to derive
m).The dynamic pressure local elevation that produces by the described secondary flow that moves upward described meniscus level, and, carry out v indirectly by measuring the difference in height between described lifting district and the height on every side
mMeasure.Experiment confirmed already, the v of Tui Daoing in this way
mValue can be used for regulating the flow of liquid metals in casting device, is difficult to obtain v with replacement
mMeasurement result.
In case derive v
m, just change at least a technological parameter, so that with v
mRemain in the preset range or remain on 0.1-0.5ms
-1On the predetermined value in the scope, preferably at 0.2-0.4ms
-1In the scope.At least a technological parameter of described control system active adjustment is so that with described meniscus characteristic or v
mRemain in the optimum range, and provide by this way and can reduce sand holes (forming) and the appearance of inclusion in foundry goods by the bubble that is detained.
According to another preferred embodiment of the invention, the feature of the described meniscus of mensuration is a temperature, and it is directly to measure, or the temperature indirect determination by measuring all mold walls as described.Control the temperature of described meniscus, avoiding surface blemish, and the high and even temperature on described meniscus, be best for this purpose.The temperature of measuring on two points on the described meniscus also provides mensuration v
mIndirect mode, i.e. v
mDerive according to described temperature measuring value.
According to a preferred embodiment of the invention a, measure the feature of described meniscus in first district, here, the metal that upwards flows of described secondary flow impacts described meniscus, and measures in second district in the downstream that is positioned at described first district.Described first and second districts are usually located at the same side of described import of flooding, promptly between described import and mold wall of flooding.
Control system of the present invention comprises checkout gear, and this device is the image data sample continuously or termly.Described checkout gear is based on the device of electromagnetic induction, comprises variableimpedance, VR, and induction reactance and eddy current sensor, optics, radioactivity and thermic devices, as thermocouple, it can measure heat flux.
According to a preferred embodiment of the invention a, at least one of described checkout gear be designed to can by and be parallel to the motion of described meniscus substantially.
According to a preferred embodiment of the invention a, when described inductive pick-up used with the calutron such as EMBR or electromagnetic mixing apparatus, when described inductive pick-up image data sample, described calutron was temporary transient stopping using.Such as v
mTechnological parameter change relatively lentamente usually, therefore, if EMBR disconnects,
vM needs a few at least times in second before obviously changing usually.Sensor will be measured in the time that was less than for 1 second usually, therefore, needs only and lacks described turn-off time, during this period v
mJust can significantly not change.
When EMBR stopped using, EMBR ' s magnetic field can complete attenuation.Magnetic induction, promptly remanent magnetism still keeps.But,, can calculate the remanent magnetism amount on the predetermined phase of sensor, and be used to proofread and correct the mensuration of being undertaken by described sensor if described EMBR disconnects.Therefore, in a preferred embodiment of the invention, described calutron is to stop using on the predetermined phase of described checkout gear, so that described residual remanent magnetism can be corrected.
In addition, between their lay-off period, provide at least one current impulse by described calutron, so that get rid of described remaining remanent magnetism after they are stopped using, it has further reduced the margin of error in measuring.
In the casting device of described mould vibrations, comprise that some kinds of state-variables of described meniscus level are subjected to the influence of this vibrations, this vibrations can be disturbed the mensuration that will carry out.In other embodiments of the present invention, in order to reduce the interference of vibrations to the mensuration of being undertaken by described checkout gear, described mensuration is to carry out synchronously with the vibrations of described mould, always carries out on the same phase of described mould concussion so that guarantee to measure.Perhaps adopt filtration or time average from the signal of described sensor.
In another kind of preferred embodiment of the present invention, described checkout gear is incorporated in the described calutron, be that carry out at the position of the technological parameter that will measure in as close as possible described calutron influence so that guarantee to measure.According to another preferred embodiment of the invention, it is identical that described checkout gear and described calutron have adopted, or identical magnetic core of part and/or identical induction winding.
According to another preferred embodiment of the invention, described mould is divided into two or more control zones, and the feature of described meniscus is measured in each control zone.Described mould preferably separates on the vertical line that is positioned at described mould central authorities, and changes one of described technological parameter, so that obtain symmetric(al) flow substantially in described mould.For the rectangular mould of the sidewall that comprises two long sidewalls and two weak points, preferably described sensor is installed between the sidewall of weak point of described import of flooding and described mould.In order to obtain symmetric(al) flow, change at least one short sidewall of described casting mould and the certain distance between the described import of flooding.Described distance is by moving described import of flooding along the direction that is parallel to described mould side wall substantially or changing by at least one the short sidewall that moves described mould.
When described mould is divided into one or more control zone, described calutron can be divided into described mould in the suitable a plurality of parts of control zone quantity.When the non-symmetrical features of the meniscus that detects described control zone, change magnetic field from least one part, so that the flow of influence in its control corresponding district, and in described mould, obtain symmetric(al) flow.
According to another preferred embodiment of the invention, described control system comprises software service, is used for according to the data derivation v from described checkout gear
m, and being used for determining the regulation and control amount of technological parameter, this regulation and control are to make v when detecting the error that departs from described optimum range or value
mReach described ideal range or reach described ideal value.
According to another preferred embodiment of the invention, described control device comprises high speed internet.
The invention still further relates to the computer program that uses on the control system of cast metal being used for, it comprises computer program code means, be used to assess the data of self-test device, described checkout gear moment by described casting technique in the feature on the described meniscus in the described mould of instantaneous measurement at casting device at least two points at described meniscus.Described computer program there is no need to be installed in the position identical with described casting device.It can be connected with the described control system of described device from afar by the network such as the internet.
The invention still further relates to the device that is used for the cast metal, it comprises mould, is used for providing to described mould the device of liquid metals, and such as the calutron of electromagnetic brake or agitating device, is used for regulating liquid metals flowing at described mould.Described device comprises as control system any in the above-mentioned embodiment, so that control the magnetic field intensity of described calutron.
The invention still further relates to the method that is used for the cast metal, wherein, liquid metals is imported mould and such as the calutron of electromagnetic brake and agitating device, they are used to regulate liquid metals flowing in described mould.Described method comprises the feature of measuring described meniscus, as use the checkout gear instantaneous measurement be positioned at as described in the height and the temperature of meniscus at least two points of meniscus, evaluation is from the data of described checkout gear, and automatically change at least a technological parameter, as casting speed, inert gas flow, or the magnetic field intensity of described calutron are so that obtain desirable product quality.When the state-variable of the described mensuration of assessment, change at least a technological parameter, as casting speed, inert gas flow, such as the magnetic field intensity of the calutron of electromagnetic brake or agitating device, bloom slab width, the depth of immersion of the import of flooding, or the angle of described import of flooding, so that remain on described technological parameter in the preset range or remain on the predetermined value.
Described control system, computer program, apparatus and method are specially adapted to, but are not limited to such as iron and steel, the continuous or semi-continuous casting of the metal of aluminium or copper.
Description of drawings
The present invention will be described for form to give an example below in conjunction with accompanying drawing, wherein
Fig. 1 represents to be used for the schematic representation of apparatus of continuous casting of metal;
Fig. 2 represents the part enlarged diagram of casting device shown in Figure 1, shows control system according to a preferred embodiment of the invention a;
Fig. 3 represents the part of casting device, shows control system according to a preferred embodiment of the invention a, and wherein, described mould is divided at least two control zones; With
Fig. 4 represents the part of casting device, shows control system according to a preferred embodiment of the invention a, and wherein, at least one detector is movably installed.
The specific embodiment
In continuous casting apparatus shown in Figure 1, motlten metal 1 is injected tundish 2 from the ladle (not shown).Described metal enters water-cooled mould 4 by the import 3 of flooding then, and here the shell of described metal begins to solidify, and produces the metal continuous cast stream with solid shell 5 and liquid core.In case described shell has enough thickness, just the strand with described curing enters a series of rolls 6 downwards, here with described strand roll forming, and solidifies fully.In case described strand solidifies fully, just that it is stretching, and be cut into the length that needs at cut-out point 7 places.
Fig. 2 represents to enter by the side ports 8 in the import 3 of flooding the flow pattern of the motlten metal 1 of mould 4.In described mould, described metal flow circulates in curing metal 5 lateral faces.Main flow 9 flows downward along casting direction.Secondary flow 10 upwards flows towards meniscus 11 along the side of described mould with speed u.The kinetic energy of the described secondary flow that moves up has determined v
mSize.EMBR is installed, so that can the secondary metal flow 10 on described mould top be slowed down when needed.
Show the control system that is used at described mould right upper portion regulation and control liquid metals flow.Described control system comprises two sensors 12,13, as laser instrument, it can determination sensor and meniscus between distance z, or be positioned at the meniscus temperature at two positions, and pass through electricity, optics or radio signal send to control device 14 with this information.The metal that described sensor is positioned at described secondary flow upwards flows to first district of described meniscus 11 (sensor 12) generation impact with speed u, and measure in second district that is positioned at downstream, first district, for example, central authorities at described mould 4, here, the height of described meniscus can not be subjected to the influence of upwards flowing of described secondary flow metal to a great extent, and is metastable (sensor 13) therefore.
Described control device 14 assessments are from the data of described sensor, and at least one signal is sent to current-limiting apparatus, the control of this device is transported to the winding of the electromagnet among the EMBR or is transported to the magnitude of current in the mechanical device, thus, for example regulate the magnetic core of EMBR or the distance between the described mould, so that change the magnetic field intensity of EMBR, it can play a role at least a portion in zone 15.
Fig. 2 represents that described sensor is installed in half of described mould.But, the fluctuation of described meniscus will never be complete symmetry, because the obstruction that inclusion causes the adhesion of the mouth of described shower nozzle or the unexpected mediation of generation when described inclusion is discharged.Therefore, a plurality of districts that described mould is divided into as shown in Figure 3 are favourable, these districts have arbitrary shape or size, comprise at least one sensor separately, the regulation and control calutron provides information by these sensors to control system, so that can only work in the zone of the described calutron that is independent of other districts that influence described mould.Except regulating described calutron, when control device 14 detects asymmetric drift---when being otherwise known as bias current, can control the described feature of described meniscus.In the rectangular mould of the sidewall 18 that comprises two long sidewall (not shown) and two weak points, preferably described sensor is installed between the sidewall of weak point of described import of flooding and described mould.By regulate between at least one short sidewall of described mould 4 and the described import of flooding 3 apart from a, b.Apart from a, the regulation and control of b can realize by at least one the short sidewall that moves described mould.The preferred sidewall that moves two weak points simultaneously, so that keep described bloom slab width, adjusting between the sidewall of described import of flooding 3 and described weak point apart from a, the another kind of method of b is, the wide sidewall that is parallel to described mould moves described import of flooding, so that 15, the 16 interior symmetric(al) flows that obtain two control zones.The another kind of method that obtains symmetric(al) flow in two control zones 15,16 of described mould is the angle that described relatively casting direction (z) changes the described import of flooding 3.
When described mould is divided into one or more control zones 15,16 o'clock, as shown in Figure 4, described calutron can be divided into described mould 4 in the corresponding a plurality of parts of quantity of control zone 15,16.When the non-symmetrical features of the meniscus that detects described control zone 15,16, change the magnetic field of at least a portion of described calutron, so that the flow of influence in corresponding control zone, and in described mould, obtain symmetric(al) flow.
As shown in Fig. 3, described control system can include only a sensor 12 rather than two sensors 12,13, and it is installed into and can moves on described meniscus 11.Sensor 12 scans described meniscus, and measures the height of at least two point of described meniscus.Difference in height between two points of described meniscus is used to derive motlten metal at described meniscus (v
m) on flow velocity.Replace measuring flow velocity, described sensor can be measured the temperature of at least two points on the described meniscus.
Although only some preferred embodiment of the present invention was illustrated and illustrated already, to those skilled in the art, much improve and change is conspicuous.Therefore, should be understood that all such improvement of the present invention and change all belong to the scope of claims.
Claims (29)
1. be used for regulating the control system of liquid metals at the flow of the device of cast metal, comprise the checkout gear (12 that is used to measure state-variable, 13), be used to assess control device (14 from the data of described checkout gear, 17), and be used for changing at least a technological parameter automatically so that optimize the device of casting condition, it is characterized in that, described checkout gear (12,13) in described casting technique, detect the height of the meniscus at least two points on the meniscus (11), the flow velocity v of described motlten metal on meniscus that be used to derive of the difference in height between these two points instantaneously
m
2. control system as claimed in claim 1 is characterized in that, described at least a technological parameter is a casting speed, inert gas flow, the magnetic field intensity of calutron, bloom slab width, the depth of immersion of the import of flooding (3), or the angle of the import of flooding.
3. as the control system of claim 1 or 2, it is characterized in that, change at least a technological parameter, so that remain on the flow velocity of described motlten metal on meniscus in the preset range or remain on the predetermined value.
4. control system as claimed in claim 3 is characterized in that, the flow velocity of described motlten metal on meniscus is at 0.1-0.5ms
-1In the scope.
5. control system as claimed in claim 4 is characterized in that, the flow velocity of described motlten metal on meniscus is at 0.2-0.4ms
-1In the scope.
6. as the control system of above-mentioned claim 1 or 2, it is characterized in that the feature of the meniscus of being measured (11) is a temperature.
7. control system as claimed in claim 6 is characterized in that, described checkout gear (12,13) is directly or indirectly measured described meniscus temperature.
8. as the control system of claim 1 or 2, it is characterized in that the feature of described meniscus is to measure in first district of the described meniscus of metal bump (11) that upwards flows of described secondary flow with in second district that is positioned at downstream, described first district.
9. as the control system of above-mentioned claim 1 or 2, it is characterized in that described checkout gear (12,13) is the image data sample continuously.
10. as the control system of claim 1 or 2, it is characterized in that described checkout gear (12,13) is the image data sample termly.
11. as above-mentioned claim 1 or 2 control system, it is characterized in that, at least one of described checkout gear (12,13) be configured to can along and be parallel to described meniscus (4) and move.
12. control system as claim 10, be used for being used for the device of cast metal, it comprises calutron, so that regulate the flow of liquid metals in described mould, it is characterized in that, described calutron temporarily stops, and described checkout gear (12,13) image data sample during this period.
13. the control system as claim 12 is characterized in that, described calutron is to stop on the predetermined phase of described checkout gear (12,13), so that can proofread and correct described residual remanent magnetism.
14. the control system as claim 12 or 13 is characterized in that, described calutron provides at least one current impulse at described stopping period, so that get rid of remanent magnetism remaining after described calutron is stopped using.
15. control system as claim 10, be used for being used for the device of cast metal, comprise mould (4), it comprises the device that is used to vibrate described mould, it is characterized in that, described checkout gear (12,13) is synchronous with described mould vibration, so that data are to vibrate identical phase place up-sampling with described mould.
16. the control system as claim 12 is characterized in that, described checkout gear (12,13) is added on the described calutron.
17. the control system as claim 16 is characterized in that, it is described identical that described checkout gear (12,13) and described calutron adopt, or identical magnetic core of part and/or identical induction winding.
18. as the control system of above-mentioned claim 16, it is characterized in that, it comprises and being used to from described checkout gear (12,13) data the derive flow velocity of described motlten metal on meniscus and the software service of the regulation and control amount of definite technological parameter, described regulated quantity are to make the flow velocity of described motlten metal on meniscus enter preset range or reach predetermined value necessary when departing from optimum range or value detecting.
19. as the control system of above-mentioned claim 16, it is characterized in that, described mould (4) is divided into one or more control zones (15,16), the feature of described meniscus is to measure in each control zone (15,16), and, described at least a technological parameter changes, so that obtain symmetric(al) flow in described mould (4).
20. control system as claim 19, it is characterized in that, described mould (4) comprises side (18) and two long sides of two weak points, and, described at least a technological parameter be at least one short sidewall of described mould (4) and the distance between the described import of flooding (3) (a, b).
21. the control system as claim 20 is characterized in that, (a is by along the sidewall direction of the length that is parallel to described mould (4) and flatly move and flood import (3) and change b) to described distance.
22. the control system as claim 20 is characterized in that, (a is to change by at least one the short sidewall (18) that moves described mould (4) b) to described distance.
23. control system as claim 19, it is characterized in that, described calutron be divided into described mould (4) in the corresponding a plurality of parts in a plurality of control zones (15,16), and, detecting control zone (15, during the asymmetrical feature of meniscus 16), change magnetic field, so that influence is in its corresponding control zone (15 from least a portion, 16) flow in, and in described mould, obtain symmetric(al) flow.
24. be used for the computer program of control system of the device of cast metal, it is characterized in that, it comprises that being used for assessment comes self-test device (12,13) data computing machine program code devices, described checkout gear is in the described mould of casting device, in described casting technique, on two points on the meniscus (11), measure the height of described meniscus at least, with the flow velocity v of described motlten metal on meniscus that be used to derive of the difference in height between these two points instantaneously
m
25. be used for the device of cast metal, comprise mould (4), device with the described mould of liquid metals (1) input, and the calutron that is used for regulating the flow of described mould liquid metals, it is characterized in that, it comprises as control system any in the above-mentioned claim, so that control the magnetic field intensity of described calutron.
26. be used for the method for cast metal, wherein, with liquid metals (1) input mould (4), it is characterized in that, in described casting technique, at least two points of described meniscus, measure the height of meniscus (11) instantaneously, assessment is from the data of described checkout gear, and, with the flow velocity v of described motlten metal on meniscus that be used to derive of the difference in height between these two points
m, and change at least a technological parameter automatically, so that optimize described casting condition.
27. the method as claim 26 is characterized in that, described at least a technological parameter is a casting speed, inert gas flow, the magnetic field intensity of calutron, bloom slab width, the depth of immersion of the import of flooding, or the angle of the import of flooding (3).
28. the method as claim 26 or 27 is characterized in that, when the technological parameter of the described mensuration of assessment, changes at least a technological parameter, so that remain on technological parameter in the preset range or remain on the predetermined value.
29. the method as claim 28 is characterized in that, it may further comprise the steps: change at least a technological parameter, so that remain on the flow velocity of described motlten metal on meniscus in the preset range or remain on the predetermined value.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US42988402P | 2002-11-29 | 2002-11-29 | |
| US60/429,884 | 2002-11-29 | ||
| SE03010493 | 2003-04-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1717288A CN1717288A (en) | 2006-01-04 |
| CN1330439C true CN1330439C (en) | 2007-08-08 |
Family
ID=35822497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200380104525XA Expired - Lifetime CN1330439C (en) | 2002-11-29 | 2003-11-28 | Control system, computer program product, device and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1330439C (en) |
| SE (1) | SE0301049A0 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110290888A (en) * | 2017-02-20 | 2019-09-27 | Abb公司 | For controlling the method and stirring system of magnetic stirrer |
| CN110382137A (en) * | 2017-03-03 | 2019-10-25 | 日铁不锈钢株式会社 | Continuous casing and continuous casting apparatus |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201800006751A1 (en) * | 2018-06-28 | 2019-12-28 | APPARATUS AND METHOD OF CONTROL OF CONTINUOUS CASTING | |
| CN110394432B (en) * | 2019-08-22 | 2021-09-07 | 联峰钢铁（张家港）有限公司 | Method and device for inspecting continuous casting protection pouring |
| CN115229150B (en) * | 2022-07-04 | 2024-05-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling rail inclusions |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5307863A (en) * | 1991-12-31 | 1994-05-03 | Nkk Corporation | Method for continuous casting of slab |
| US5605188A (en) * | 1993-03-30 | 1997-02-25 | Sollac (Societe Anonyme) | Method and device for regulating the level of liquid metal in a mold for the continuous casting of metals |
| CN1149845A (en) * | 1995-02-28 | 1997-05-14 | 日本钢管株式会社 | Method of controlling continuous casting and apparatus thereof |
| US5657816A (en) * | 1994-03-29 | 1997-08-19 | Nippon Steel Corporation | Method for regulating flow of molten steel within mold by utilizing direct current magnetic field |
-
2003
- 2003-04-07 SE SE0301049A patent/SE0301049A0/en not_active Application Discontinuation
- 2003-11-28 CN CNB200380104525XA patent/CN1330439C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5307863A (en) * | 1991-12-31 | 1994-05-03 | Nkk Corporation | Method for continuous casting of slab |
| US5605188A (en) * | 1993-03-30 | 1997-02-25 | Sollac (Societe Anonyme) | Method and device for regulating the level of liquid metal in a mold for the continuous casting of metals |
| US5657816A (en) * | 1994-03-29 | 1997-08-19 | Nippon Steel Corporation | Method for regulating flow of molten steel within mold by utilizing direct current magnetic field |
| CN1149845A (en) * | 1995-02-28 | 1997-05-14 | 日本钢管株式会社 | Method of controlling continuous casting and apparatus thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110290888A (en) * | 2017-02-20 | 2019-09-27 | Abb公司 | For controlling the method and stirring system of magnetic stirrer |
| CN110382137A (en) * | 2017-03-03 | 2019-10-25 | 日铁不锈钢株式会社 | Continuous casing and continuous casting apparatus |
| CN110382137B (en) * | 2017-03-03 | 2021-09-10 | 日铁不锈钢株式会社 | Continuous casting method and continuous casting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| SE0301049D0 (en) | 2003-04-07 |
| CN1717288A (en) | 2006-01-04 |
| SE0301049A0 (en) | 2004-05-30 |
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