CN1483985A - Small cross steel tapping control method for continous steel billet neating furnace - Google Patents
Small cross steel tapping control method for continous steel billet neating furnace Download PDFInfo
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- CN1483985A CN1483985A CNA021329710A CN02132971A CN1483985A CN 1483985 A CN1483985 A CN 1483985A CN A021329710 A CNA021329710 A CN A021329710A CN 02132971 A CN02132971 A CN 02132971A CN 1483985 A CN1483985 A CN 1483985A
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Abstract
The present invention discloses a small-cross tapping control method of continuous cast billet heating furnace, and is characterized by that at charging side of two heating furnaces a furnace-charging sensor, slab length detection disk and slab furnace-charging temp. detector are mounted, in the interior of the furnace a detector is mounted and at tapping hole a heat metal detector is mounted. The slab length signal, billet furnace-charging temp. signal and slab pulling speed signal are transferred into PLC and process control computer, and the computer can be used for making operation and comparison so as to obtain the optimized tapping modulus of two furnaces and can implement slab small-cross tapping control of two heating furnaces.
Description
Affiliated field
The invention belongs to the production field of hot rolled plate band, specifically is the tapping control method of controlling the little intersection of doubly-linked cast steel base heating furnace automatically.
Background technology
What existing and conticaster were supporting is two walking beam furnaces, no matter because the charging temperature of two heating furnace slab, still slab trimmed size and steel grade generally are inconsistent, following problem will occur when therefore the heating of the steel billet of the different size of two different heating furnaces is tapped:
1, production is coordinated bad, output is influenced, another wait (steel billet that intersects a greatly tapping) because stove is tapped, the slab that is directed at another stove is long heat time heating time in stove, substantially exceeded the time inside furnace of regulation, and the last tapping of this piece slab itself steel billet temperature do not reach requirement yet, cause output to reduce, energy consumption increases, a stove is tapped and also is subjected to the influence of other stove tapping rhythm simultaneously, heating furnace goes out the bloom number can not be too many, otherwise influence the tapping of an other stove.
2, the blank temperature instability causes the product temperature instability, general rule is that the temperature of first compact is minimum, and second deblocking temperature increases, and the 3rd deblocking temperature is the highest, reduce gradually later on, its influence is, single stove product thickness precision control is unstable, and it is bigger to fluctuate, on the other hand, two stove blank temperatures are inconsistent, so also influence the control of product precision, and product quality occurs than great fluctuation process.
3, being difficult for carrying out automation control produces.
Summary of the invention:
Purpose of the present invention is exactly the difficulty that is run into during according to the tapping of above-mentioned continuous casting steel billet, discloses a kind of tapping control method that adopts the little intersection of continuous casting steel billet heating furnace of automatic control.
The object of the present invention is achieved like this, adopt two heating furnaces to replace the little intersection process of ejection, be fit into the stove sensor, slab length detection code-disc, slab charging temperature detector, Temperature Detector is installed in stove, hot metal detector is installed at the tapping hole place, respectively to slab length in two heating furnaces, the steel billet charging temperature, temperature detects in the stove, signal is delivered to PLC and process control computer, by computing and with rolling line on rolling rhythm relatively, two stoves of optimization go out the modulus that bloom is counted ratio, finish the little intersection tapping control of two furnace plate blank, make the little intersection tapping of steel billet of two stoves, even to guarantee out with stove and two stove tapping temperatures, stable.
The course of work of PLC of the present invention and process control computer is such, by to slab length, slab charging temperature and slab speed detect, PLC and process computer calculate the heat time heating time of slab in heating furnace and the tapping ratio modulus of a stove and No. two stoves, and by tapping setting calculating, start the extractor tapping by tapping PLC, actual measurement then obtains the actual rolling rhythm of slab, and the theoretical rolling rhythm that obtains with rolling line PLC and process control computer relatively, judge whether unanimity, if it is actual and theoretical inconsistent, calculate little cross-ratio correction factor a, feed back to process computer and redefine tapping ratio modulus, till rationally, determine model self study coefficient so repeatedly, realize band steel high precision rolling according to the heat (batch) number that goes out that is drawn.
The present invention be its heat time heating time with the PLC timer process control model H=f (v, t l) calculate,
Wherein: H is heat time heating time,
V is the slab pulling rate,
T is the slab temperature of packing into,
L is a slab length.Draw the little ratio f=a that intersects (H2/H1) of No. 1 stove and No. 2 stoves thus,
H1 is the heat time heating time of No. 1 stove,
H2 is the heat time heating time of No. 2 stoves,
A is little intersection correction proportionality coefficient.
Rolling line rolling rhythm of the present invention is to calculate according to T=T1+T2+T3+T4,
Wherein: T is the slab rolling time,
T1 is the actual delivery time of slab in the stove district,
T2 is the real time of slab in the roughing district,
T3 is the real time of made-up belt in the finish rolling district,
T4 be coiled sheet in the real time of batching the district,
Little intersection correction proportionality coefficient a of the present invention passes through model:
A=T reality/T theory,
T theory=S/V,
S is that (S comprises past for the distance in each zone distance
Return rolling distance.)
V is each regional speed.
The present invention is owing to adopt two heating furnaces to replace the little intersection process of ejection, by rational mathematical model study correction factor, formulate little cross-ratio, thereby make the calculated value of finish rolling roll gap more accurate, improve the product thickness precision, thickness and precision is reached more than 96%.
Description of drawings
Accompanying drawing 1 is a block diagram of the present invention.
Accompanying drawing 2 is PLC of the present invention and process control computer workflow diagram.
The specific embodiment
Below in conjunction with accompanying drawing a specific embodiment of the present invention is elaborated.
As Fig. 1, shown in 2, be fit into the stove sensor in two heating furnaces dress steel side, slab length detection code-disc, the measured value of its slab length by code-disc obtains, slab charging temperature detector, detecting what pack into is hot base or cold base, Temperature Detector is installed in stove, the slab detector of coming out of the stove is installed at the tapping hole place, respectively to slab length in two heating furnaces, the steel billet charging temperature, temperature detects in the stove, PLC by rolling line records the slab pulling rate, these signals are delivered to PLC and process control computer, again according to the tapping temperature requirement, by computing and with rolling line on rolling rhythm relatively, two stoves of optimization go out the modulus that bloom is counted ratio, finish the little intersection tapping control of two furnace plate blank, even to guarantee out with stove and two stove tapping temperatures, stable.
As shown in Figure 2, the course of work of PLC and process control computer is such, by to going into the slab length of stove, the slab charging temperature, slab speed detects, PLC and process computer calculate the heat time heating time of slab in heating furnace and the tapping ratio modulus of a stove and No. two stoves, and by tapping setting calculating, start the extractor tapping by tapping PLC, then logical actual measurement obtains the actual rolling rhythm of slab, and the theoretical rolling rhythm that obtains with PLC and process control computer relatively, judge whether unanimity, if calculate little cross-ratio correction factor a with reality is inconsistent, feed back to process computer and redefine tapping ratio modulus, till rationally, determine model self study coefficient so repeatedly, realize band steel high precision rolling according to the heat (batch) number that goes out that is drawn.
Be that (v, t l) calculate for process control model H=f with the PLC timer heat time heating time of the present invention.
Wherein: H is heat time heating time,
V is the slab pulling rate,
T is the slab temperature of packing into,
L is a slab length.Draw the little ratio f=a that intersects (H2/H1) of No. 1 stove and No. 2 stoves thus,
H1 is the heat time heating time of No. 1 stove,
H2 is the heat time heating time of No. 2 stoves,
A is little intersection correction proportionality coefficient.
The PLC of installation and measuring rolling line speed is gone up in each district of rolling line of the present invention, and rolling rhythm is to calculate according to computation model T=T1+T2+T3+T4.
Wherein: when T is slab rolling,
T1 is the actual delivery time of slab in the stove district,
T2 is the real time of slab in the roughing district,
T3 is the real time of made-up belt in the finish rolling district,
T4 be coiled sheet in the real time of batching the district,
Little intersection correction proportionality coefficient a of the present invention draws by model:
A=T reality/T theory,
T theory=S/V,
S is a distance,
V is a speed.
Little cross over model self study coefficient of the present invention is by concrete heating furnace heating efficiency, factor determined for the kind of slab specification, slab, the temperature of slab, rolling line speed etc., above-mentioned condition has one to change, its little cross over model self study coefficient will be revised automatically by process computer, according to little cross over model self study coefficient, adjust the milling train running parameter, to realize band steel high precision rolling.
Table 1 is listed a concrete little cross over model learning coefficient value.
Table one
| A stove | No. two stoves | A stove and No. two stoves ratio of coming out of the stove | ||||
| The blank specification | Charging temperature ℃ | Time inside furnace (minute) | The blank specification | Charging temperature ℃ | Time inside furnace (minute) | |
| 200×1250× 6000 | Cold base/hot base | ??170/150 | ??135×1270× ??10800 | ??900 | ??55 | ????1∶3/1∶2.5 |
| 200×1250× 6000 | Cold base/hot base | ??170/15 | ??135×1270× ??10800 | ??900 | ??55 | ????1∶2/1∶2 |
| 200×1250× 6000 | Cold base/hot base | ??170/15 | ??135×1270× ??10800 | ??900 | ??55 | ????1∶2/1∶1.5 |
| …… | ??…… | ??…… | ??…… | ??…… | ??…… | ?????…… |
1: 1.5 implication is that a stove goes out one in the table, and No. two stove goes out one, and then a stove goes out one, and No. two stove goes out two.1: 2.5 implication is that a stove goes out one, and No. two stove goes out two, and then a stove goes out one, and No. two stove goes out three, intersects so repeatedly and taps.
Claims (6)
1, a kind of medium thin slab continuous casting connects the little intersection tapping of billet heating furnace control method, it is characterized in that: adopt the alternately little intersection process of tapping of two heating furnaces, be fit into the stove sensor in two heating furnaces dress steel side, slab length detection code-disc, slab charging temperature detector, Temperature Detector is installed in stove, hot metal detector is installed at the tapping hole place, respectively to slab length in two heating furnaces, the steel billet charging temperature, temperature detects in the stove, signal is delivered to PLC and process control computer, by computing and with rolling line on rolling rhythm relatively, two stoves of optimization go out the modulus that bloom is counted ratio, finish the little intersection tapping control of two furnace plate blank.
2, the little intersection tapping of a kind of medium thin slab continuous casting and rolling billet heating furnace according to claim 1 control method, it is characterized in that: the course of work of PLC and process control computer is such, by to slab length, slab charging temperature and slab speed detect, PLC and process computer calculate the heat time heating time of slab in heating furnace and the tapping ratio modulus of a stove and No. two stoves, and by tapping setting calculating, start the extractor tapping by tapping PLC, actual measurement then obtains the actual rolling rhythm of slab, and the theoretical rolling rhythm that obtains with rolling line PLC and process control computer relatively, judge whether unanimity, if it is actual and theoretical inconsistent, calculate little cross-ratio correction factor a, feed back to process computer and redefine tapping ratio modulus, so repeatedly till rationally, determine model self study coefficient according to the heat (batch) number that goes out that is drawn, realize band steel high precision rolling.
3, the little intersection of a kind of medium thin slab continuous casting and rolling billet heating furnace according to claim 1 tapping control method is characterized in that: slab be the heat time heating time in stove with the PLC timer process control model H=f (v, t l) calculate,
Wherein: H is heat time heating time,
V is the slab pulling rate,
T is the slab temperature of packing into,
L is a slab length.
Draw the little ratio f=a that intersects (H2/H1) of No. 1 stove and No. 2 stoves thus,
H1 is the heat time heating time of No. 1 stove,
H2 is the heat time heating time of No. 2 stoves,
A is little intersection correction proportionality coefficient.
4, the little intersection tapping of a kind of medium thin slab continuous casting and rolling billet heating furnace according to claim 1 control method, it is characterized in that: the rolling line rolling rhythm calculates according to computation model T=T1+T2+T3+T4,
Wherein: T is the slab rolling time,
T1 is the actual delivery time of slab in the stove district,
T2 is the real time of slab in the roughing district,
T3 is the real time of made-up belt in the finish rolling district,
T4 is that coiled sheet is in the real time of batching the district.
5, a kind of small cross steel tapping control method for continous steel billet neating furnace according to claim 1 is characterized in that: little intersection correction proportionality coefficient a passes through model:
A=T reality/T theory,
T theory=S/V,
S is that distance is the distance in each zone, comprises round
Rolling distance,
V is each interval speed.
6, the little intersection tapping of a kind of medium thin slab continuous casting and rolling billet heating furnace according to claim 1 control method, it is characterized in that: what its slab length adopted is the measured value of code-disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021329710A CN100363514C (en) | 2002-09-19 | 2002-09-19 | Small cross steel tapping control method for continous steel billet neating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021329710A CN100363514C (en) | 2002-09-19 | 2002-09-19 | Small cross steel tapping control method for continous steel billet neating furnace |
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| Publication Number | Publication Date |
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| CN1483985A true CN1483985A (en) | 2004-03-24 |
| CN100363514C CN100363514C (en) | 2008-01-23 |
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|---|---|---|---|
| CNB021329710A Expired - Fee Related CN100363514C (en) | 2002-09-19 | 2002-09-19 | Small cross steel tapping control method for continous steel billet neating furnace |
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| CN101823079A (en) * | 2010-04-22 | 2010-09-08 | 攀钢集团钢铁钒钛股份有限公司 | Method for charging steel at furnace end of heating furnace |
| CN101701287B (en) * | 2009-10-28 | 2011-06-22 | 南京钢铁股份有限公司 | Method for controlling automatic equidistant steel tapping of heating furnace |
| CN102220476A (en) * | 2011-03-29 | 2011-10-19 | 上海宝钢工业检测公司 | Control method for meeting tapping interval during inserting blank materials in stepping heating furnace |
| CN102221292A (en) * | 2011-04-29 | 2011-10-19 | 上海宝钢工业检测公司 | Dynamically regulating device of walking-type heating furnace plate blank discharging stop bit and using method thereof |
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| CN102397883A (en) * | 2010-09-16 | 2012-04-04 | 鞍钢股份有限公司 | Device and method for preventing mixed steel |
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| CN102747216A (en) * | 2011-04-20 | 2012-10-24 | 宝山钢铁股份有限公司 | Method for controlling steel slab gap in heating furnace |
| CN102888505A (en) * | 2011-07-19 | 2013-01-23 | 宝山钢铁股份有限公司 | Control method for detection of slab in heating furnace |
| CN106282531A (en) * | 2015-05-27 | 2017-01-04 | 鞍钢股份有限公司 | A kind of walking beam furnace high position tapping autocontrol method |
| CN107716553A (en) * | 2017-10-27 | 2018-02-23 | 中冶华天南京电气工程技术有限公司 | A kind of tandem rolling line pusher-type heating-furnace steel-tapping rhythm harmony control method |
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| CN115029539A (en) * | 2022-05-11 | 2022-09-09 | 首钢京唐钢铁联合有限责任公司 | Method for heating thin slab by thick slab heating furnace |
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| CN113664050A (en) * | 2021-08-26 | 2021-11-19 | 山东钢铁股份有限公司 | Steel rolling method and device |
| CN113664050B (en) * | 2021-08-26 | 2023-08-22 | 山东钢铁股份有限公司 | Steel rolling method and device |
| CN114507776A (en) * | 2022-01-11 | 2022-05-17 | 首钢京唐钢铁联合有限责任公司 | Multi-furnace tapping control method, device, medium and computer equipment |
| CN114507776B (en) * | 2022-01-11 | 2024-05-10 | 首钢京唐钢铁联合有限责任公司 | Control method, device, medium and computer equipment for multi-furnace tapping |
| CN115029539A (en) * | 2022-05-11 | 2022-09-09 | 首钢京唐钢铁联合有限责任公司 | Method for heating thin slab by thick slab heating furnace |
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Owner name: ANGANG NEW STEEL ROLLING CO., LTD. Free format text: FORMER OWNER: XINGANGTIE CO., LTD., ANSHAN IRON AND STEEL GROUP Effective date: 20061208 |
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Effective date of registration: 20061208 Address after: 114009, No. 63, Wuyi Road, MTR Eastern District, Liaoning, Anshan Applicant after: New Steel Rolling Co., Ltd., Anshan Iron and Steel Co. Address before: 114001, No. 63, Wuyi Road, MTR Eastern District, Liaoning, Anshan Applicant before: Xingangtie Co., Ltd., Anshan Iron and Steel Group |
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