CN105081255B - The method that conticaster full-automatic is poured - Google Patents
The method that conticaster full-automatic is poured Download PDFInfo
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Abstract
The invention discloses a kind of method that conticaster full-automatic is poured, the method automatic start up system secondary cooling water first, system makes middle bag slide plate standard-sized sheet by pilot operated valve device, therefrom bag is flowed into crystallizer rapidly to make molten steel, when molten steel reaches meniscus, withdrawal straightening machine automatic, meanwhile, according to the different withdrawal straightening machine raising speed of different steel grades, casting blank section and liquid steel temperature selection；When molten steel flows out from crystallizer, after molten steel forms green shell on crystallizer surface；Strand position is calculated according to casting machine pulling rate, driven roller is carried out using driven roller positioning control system lift control, and ensure the quality in strand casting cycle using systems such as soft clip and dynamic soft-reductions.The present invention is realized continuous casting full-automatic and is poured by the matching to the full technological parameter of continuous casting and chain, is solved the problems, such as manually to open and is poured that fault rate is high and slab quality is unstable；Adjusted with slide plate opening degree real time contrast by casting machine pulling rate in control system, realize the stability contorting of liquid steel level.
Description
Technical field
The present invention relates to the method for pouring of conticaster, in particular to a kind of method that conticaster full-automatic is poured.
Background technology
At present, CC at home ＆ abroad machine there is no the method that full-automatic is poured, and using manual mode open pouring.Open manually and pour
During, the matching of conticaster pulling rate and slide plate opening degree is difficult to hold, if the too fast steel stream of pulling rate does not keep up with, may result in
Breakout and interruption；If pulling rate is less than steel flow, crystallizer molten steel spilling is may result in, cause casting machine to shut down, and exist
The potential safety hazard of molten steel splash.In addition, if pulling rate raising speed is unstable, liquid fluctuating is easily caused, causes a base seriously to tie trace, and
The strand for having knot trace must cut off, therefore reduce strand lumber recovery.
The content of the invention
The technical problems to be solved by the invention are just to provide a kind of method that conticaster full-automatic is poured, and the method passes through
Matching to the full technological parameter of continuous casting and chain, realizes continuous casting full-automatic and pours, and solves artificial opening and pours that fault rate is high and casting
The unstable problem of base quality.
In order to solve the above technical problems, the method that a kind of conticaster full-automatic that the present invention is provided is poured, including following step
Suddenly：
1) when conticaster opens casting pattern, conticaster is cold two according to the steel grade of strand, width and liquid steel temperature situation
Data are searched in water database to be matched with secondary cooling water, and automatic start up system secondary cooling water；
2) after secondary cooling water starts, system makes middle bag slide plate standard-sized sheet by pilot operated valve device, and therefrom bag is flowed into knot rapidly to make molten steel
In brilliant device, and synchronously pass through distance of the mold liquid level detecting system real-time detection calculating crystallizer molten steel apart from crystallizer entrance
L, when crystallizer molten steel apart from crystallizer entrance apart from L=45mm when, i.e., molten steel reach meniscus；The mold liquid level is detected
The principle of system is that mold liquid level detection sensor is placed on into plane on crystallizer entrance, sensor can be to crystallizer inside
Longitudinal direction transmitting laser, reflects passback sensor when laser runs into molten steel, sensor sent by laser and time difference for reflecting come
Calculate distance of the crystallizer molten steel apart from crystallizer entrance；
3) when molten steel reaches meniscus, withdrawal straightening machine (conticaster) automatic, meanwhile, according to different steel grades, strand
The section withdrawal straightening machine raising speed different with liquid steel temperature selection；Specific formula is as follows：
vOutput=vInput+ gain * the times of integration, i.e.,：B is casting machine section, and dt is transient time (t
It is the integration variable of time)；
And molten steel demand is calculated according to casting machine pulling rate, casting blank section and slide plate opening degree is constantly adjusted, makes molten steel
Liquid level is steady；
VNeed=∫ v × bdt, wherein VNeedIt is transient state molten steel volume, v is casting machine pulling rate, and b is casting machine section, and dt is the transient time
C=VNeed/vWater, wherein c is slide plate opening degree, vWaterIt is molten steel flow speed in the mouth of a river；
4) when molten steel flows out from crystallizer, after molten steel forms green shell on crystallizer surface；Calculated according to casting machine pulling rate
Go out strand position,
L=L0+∫v×dt
L0For strand original position, v be casting machine pulling rate, dt be the transient time, L be strand position；
Driven roller is carried out using driven roller positioning control system lift control, and utilize soft clip and dynamic soft-reduction system
Quality in blanket insurance card strand casting cycle.
Further, if steel is middle low carbon steel, when casting blank section is less than 1550 DEG C less than 1800mm and liquid steel temperature, selection
Curve 1：
V=0, (0≤t ＜ t1)；
V=a1(t-t1)+v1, (t1≤ t ＜ t2)；
V=v2, (t2≤ t ＜ t4)；
V=a1(t-t4)+v2, (t4≤ t ＜ t6)；
V=v3, (t6≤ t ＜ t8)；
V=a1(t-t8)+v3(t8≤ t ＜ t10)；
V=vSetting(t10≤t)；
Remaining situation, trade-off curve 2：
V=0 (0≤t ＜ t1)
V=a2(t-t1)+v1(t1≤ t ＜ t2)
V=v2(t3≤ t ＜ t5)
V=a2(t-t5)+V2(t5≤ t ＜ t7)
V=v3(t7≤ t ＜ t9)
V=a2(t-t9)+v 3(t9≤ t ＜ t11)
V=vSetting(t11≤t)
Wherein, v is casting machine pulling rate (speed of withdrawal straightening machine), v1It is casting machine starting pulling rate and v1=0.3~0.4m/min, v2
It is casting machine stage casing pulling rate and v2=0.4~0.6m/min, v3It is casting machine transition pulling rate and v2=0.8~1.0m/min, vSettingIt is casting
Machine sets pulling rate and v2=1.1~1.4m/min；
Wherein, t is the casting machine duration of runs, t1=10~12s, t2=15~30s, t3=45~60s, t4=75~80s, t5
=90~95s, t6=105~110s, t7=130~140s, t8=160~170s, t9=190~200s, t10=210~
215s、t11=230~240s；
a1Span is 1~3, a2Span is 0.4~1, and a1＞ a2。
Note：The principle that casting machine pulling rate and strand position determine：Photoelectric encoder, photoelectric encoder are installed on each motor
Rotating speed and position to motor carry out real-time tracking record, and speed reducing ratio by reduction box is converted to turning for casting machine driven roller
Speed, the diameter further according to driven roller calculates the linear velocity of driven roller, and the linear velocity of driven roller is exactly casting machine pulling rate, by
The time of the strand original position, casting machine pulling rate and casting machine operating known accurately calculates strand position.
The beneficial effects of the present invention are：
1st, it is of the invention by the matching to the full technological parameter of continuous casting and chain, realize continuous casting full-automatic and pour, solve
Manually open the problem for pouring that fault rate is high and slab quality is unstable；
2nd, the present invention is adjusted by casting machine pulling rate and slide plate opening degree real time contrast in the controls, realizes molten steel liquid
The stability contorting in face；
3rd, the present invention improves strand casting cycle using soft clip, dynamic soft-reduction and driven roller position tracking technology
In quality；
4th, the present invention opens the process pulling rate of pouring and is controlled using hyperbola to casting machine, and according to casting steel grade, section and temperature
Degree information, realizes automatically selecting for climb curve；
5th, casting machine of the present invention is opened to pour and be provided with certain buffer time to each stage speed in climb curve, is prevented effectively from
Raising speed is too fast and cause the situation of liquid level rapid fluctuation to occur, eliminate strand knot trace, further increase slab quality；
6th, the present invention uses modularization programming, its program inside is freely called, and improves system response time；
7th, only need to change parameter can need designed, designed climb curve to the present invention according to new steel grade, easy to operate.
Brief description of the drawings
Fig. 1 is control principle drawing of the invention；
Fig. 2 is casting speed control curve map of the invention；
Fig. 3 is programme-control frame diagram of the invention.
Specific embodiment
In order to preferably explain the present invention, below in conjunction with the specific embodiment main contents that the present invention is furture elucidated, but
Present disclosure is not limited solely to following examples.
A kind of method that conticaster full-automatic is poured, comprises the following steps：
1) when conticaster opens casting pattern, conticaster is cold two according to the steel grade of strand, width and liquid steel temperature situation
Data are searched in water database to be matched with to secondary cooling water, and automatic start up system secondary cooling water；
2) after secondary cooling water starts, system makes middle bag slide plate standard-sized sheet by pilot operated valve device, and therefrom bag is flowed into knot rapidly to make molten steel
In brilliant device, and synchronously pass through distance of the mold liquid level detecting system real-time detection calculating crystallizer molten steel apart from crystallizer entrance
L, when crystallizer molten steel apart from crystallizer entrance apart from L=45mm when, i.e., molten steel reach meniscus；The mold liquid level is detected
The principle of system is that mold liquid level detection sensor is placed on into plane on crystallizer entrance, sensor can be to crystallizer inside
Longitudinal direction transmitting laser, reflects passback sensor when laser runs into molten steel, sensor sent by laser and time difference for reflecting come
Calculate distance of the crystallizer molten steel apart from crystallizer entrance；
3) when molten steel reaches meniscus, withdrawal straightening machine (conticaster) automatic, meanwhile, according to different steel grades, strand
The section withdrawal straightening machine raising speed different with liquid steel temperature selection；Specific formula is as follows：
vOutput=vInput+ gain * the times of integration, i.e.,：B is casting machine section, and dt is transient time (t
It is the integration variable of time)
If steel is middle low carbon steel, when casting blank section is less than 1550 DEG C less than 1800mm and liquid steel temperature, trade-off curve 1；
V=0, (0≤t ＜ t1)；
V=a1(t-t1)+v1, (t1≤ t ＜ t2)；
V=v2, (t2≤ t ＜ t4)；
V=a1(t-t4)+v2, (t4≤ t ＜ t6)；
V=v3, (t6≤ t ＜ t8)；
V=a1(t-t8)+V3(t8≤ t ＜ t10)；
V=vSetting(t10≤t)；
Remaining situation, trade-off curve 2：
V=0 (0≤t ＜ t1)
V=a2(t-t1)+v1(t1≤ t ＜ t2)
V=V2(t3≤ t ＜ t5)
V=a2(t-t5)+V2(t5≤ t ＜ t7)
V=v3(t7≤ t ＜ t9)
V=a2(t-t9)+v3(t9≤ t ＜ t11)
V=vSetting(t11≤t)
Wherein, v is casting machine pulling rate (speed of withdrawal straightening machine), v1It is casting machine starting pulling rate and v1=0.3~0.4m/min, v2
It is casting machine stage casing pulling rate and v2=0.4~0.6m/min, v3It is casting machine transition pulling rate and v2=0.8~1.0m/min, vSettingIt is casting
Machine sets pulling rate and v2=1.1~1.4m/min；
Wherein, t is the casting machine duration of runs, t1=10~12s, t2=15~30s, t3=45~60s, t4=75~80s, t5
=90~95s, t6=105~110s, t7=130~140s, t8=160~170s, t9=190~200s, t10=210~
215s、t11=230~240s；
a1Span is 1~3, a2Span is 0.4~1, and a1＞ a2。
And molten steel demand is calculated according to casting machine pulling rate, casting blank section and slide plate opening degree is constantly adjusted, makes molten steel
Liquid level is steady；
VNeed=∫ v × bdt, wherein VNeedIt is transient state molten steel volume, v is casting machine pulling rate, and b is casting machine section, when dt is transient state
Between；
C=VNeed/vWater, wherein c is slide plate opening degree, vWaterIt is molten steel flow speed in the mouth of a river.
4) when molten steel flows out from crystallizer, after molten steel forms green shell on crystallizer surface；Calculated according to casting machine pulling rate
Go out strand position,
L=L0+ ∫ v × dt,
Wherein, L0For strand original position, V be casting machine pulling rate, dt be the transient time, L be strand position；
Driven roller is carried out using driven roller positioning control system lift control, and utilize soft clip and dynamic soft-reduction system
Quality in blanket insurance card strand casting cycle.
Other unspecified parts are prior art.Although above-described embodiment is made that to the present invention and retouch in detail
State, but it is only a part of embodiment of the invention, rather than whole embodiments, people can also according to the present embodiment without
Other embodiment is obtained under the premise of creativeness, these embodiments belong to the scope of the present invention.
Claims (2)
1. a kind of method that conticaster full-automatic is poured, it is characterised in that：Comprise the following steps：
1) when conticaster opens casting pattern, conticaster according to the steel grade of strand, width and liquid steel temperature situation, in secondary cooling water number
Matched with secondary cooling water according to data are searched in storehouse, and automatic start up system secondary cooling water；
2) after secondary cooling water starts, system makes middle bag slide plate standard-sized sheet by pilot operated valve device, and therefrom bag is flowed into crystallizer rapidly to make molten steel
In, and crystallizer molten steel synchronously calculated apart from crystallizer entrance apart from L by mold liquid level detecting system real-time detection, when
Crystallizer molten steel apart from crystallizer entrance apart from L=45mm when, i.e., molten steel reach meniscus；The mold liquid level detecting system
Principle be that mold liquid level detection sensor is placed on plane on crystallizer entrance, sensor can be to crystallizer inside longitudinal direction
Transmitting laser, reflects passback sensor when laser runs into molten steel, and sensor is sent by laser and time difference for reflecting calculates
Distance of the crystallizer molten steel apart from crystallizer entrance；
3) when molten steel reaches meniscus, withdrawal straightening machine automatic, meanwhile, according to different steel grades, casting blank section and molten steel temperature
The different withdrawal straightening machine raising speed of degree selection；Specific formula is as follows：
vOutput=vInput+ gain * the times of integration, i.e.,：
Wherein, b is casting machine section, and dt is the transient time；
And molten steel demand is calculated according to casting machine pulling rate, casting blank section and slide plate opening degree is constantly adjusted, makes liquid steel level
Steadily；
VNeed=∫ v × bdt, wherein VNeedFor transient state molten steel volume, v be casting machine pulling rate, b be casting machine section, dt be the transient time；
C=VNeed/vWater, wherein c is slide plate opening degree, vWaterIt is molten steel flow speed in the mouth of a river；
4) when molten steel flows out from crystallizer, after molten steel forms green shell on crystallizer surface；Casting is calculated according to casting machine pulling rate
Base position,
L=L0+∫v×dt
Wherein, L0It is strand original position, v is casting machine pulling rate, dt is the transient time, L is strand position；
Driven roller is carried out using driven roller positioning control system lift control, and protected using soft clip and dynamic soft-reduction system
Quality in card strand casting cycle.
2. the method that conticaster full-automatic is poured according to claim 1, it is characterised in that：The step 3) in,
If steel is middle low carbon steel, when casting blank section is less than 1550 DEG C less than 1800mm and liquid steel temperature, trade-off curve 1：
V=0,0≤t ＜ t1；
V=a1(t-t1)+v1, t1≤ t ＜ t2；
V=v2, t2≤ t ＜ t4；
V=a1(t-t4)+v2, t4≤ t ＜ t6；
V=v3, t6≤ t ＜ t8；
V=a1(t-t8)+v3, t8≤ t ＜ t10；
V=vSetting, t10≤t；
Remaining situation, trade-off curve 2：
V=0,0≤t ＜ t1；
V=a2(t-t1)+v1, t1≤ t ＜ t2；
V=v2, t3≤ t ＜ t5；
V=a2(t-t5)+v2, t5≤ t ＜ t7；
V=v3, t7≤ t ＜ t9；
V=a2(t-t9)+v3, t9≤ t ＜ t11；
V=vSetting, t11≤t；
Wherein, v is casting machine pulling rate, v1It is casting machine starting pulling rate and v1=0.3~0.4m/min, v2It is casting machine stage casing pulling rate and v2=
0.4~0.6m/min, v3It is casting machine transition pulling rate and v2=0.8~1.0m/min, vSettingFor casting machine sets pulling rate and v2=1.1~
1.4m/min；
Wherein, t is the casting machine duration of runs, t1=10~12s, t2=15~30s, t3=45~60s, t4=75~80s, t5=90
~95s, t6=105~110s, t7=130~140s, t8=160~170s, t9=190~200s, t10=210~215s, t11
=230~240s；
a1Span is 1~3, a2Span is 0.4~1, and a1＞ a2。
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| CN108145112B (en) * | 2016-12-05 | 2020-01-21 | 上海梅山钢铁股份有限公司 | Automatic flow control casting process for slab continuous casting stopper rod based on automatic liquid level control |
| CN108746577B (en) * | 2018-05-30 | 2020-09-18 | 山东钢铁股份有限公司 | Device and method for preventing casting and spraying of steel |
| CN108907130B (en) * | 2018-06-25 | 2020-12-22 | 日照钢铁控股集团有限公司 | Automatic casting method for thin slab continuous casting machine |
| CN111168029B (en) * | 2020-01-14 | 2022-04-05 | 邢台钢铁有限责任公司 | Control method for automatic casting of large ladle of continuous casting machine |
| CN111468694B (en) * | 2020-04-10 | 2022-03-11 | 山东钢铁股份有限公司 | Method for starting casting automatically in fixed-diameter casting process of billet continuous casting machine |
| CN112417217B (en) * | 2020-10-30 | 2023-08-11 | 北京科技大学 | Continuous casting data space-time matching method based on heat tracking and casting flow tracking |
| CN112355302A (en) * | 2020-11-16 | 2021-02-12 | 山西太钢不锈钢股份有限公司 | Die casting method for automatic casting |
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| US3204460A (en) * | 1962-08-13 | 1965-09-07 | United States Steel Corp | System for indicating the liquid level in a continuous-casting mold or the like |
| CN101966571A (en) * | 2010-11-15 | 2011-02-09 | 南京钢铁股份有限公司 | Pouring method capable of controlling flow rate |
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Effective date of registration: 20170731 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Patentee before: Wuhan Iron & Steel (Group) Corp. |