CN112934976B - Control method for improving billet discharging efficiency of heating furnace - Google Patents
Control method for improving billet discharging efficiency of heating furnace Download PDFInfo
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- CN112934976B CN112934976B CN202110108878.7A CN202110108878A CN112934976B CN 112934976 B CN112934976 B CN 112934976B CN 202110108878 A CN202110108878 A CN 202110108878A CN 112934976 B CN112934976 B CN 112934976B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/005—Control of time interval or spacing between workpieces
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Abstract
The invention relates to the technical field of steel rolling, in particular to a control method for improving the billet ejection efficiency of a heating furnace, which is characterized in that post personnel give instructions after the conditions of rolling are met; the control system performs automatic control: firstly, a billet discharging roller way in a heating furnace starts to operate, and a billet is conveyed to discharge from the furnace, wherein the billet running speed is V2; secondly, when the tail end of the discharged steel billet passes through the point A, the roller way in the furnace stops running; thirdly, when the front end of the steel billet runs to the point B, the running speed of the steel billet is adjusted to be V; fourthly, when the front end of the steel billet enters the roughing mill to start rolling, a roller way in the heating furnace is started to operate, the steel billet is conveyed out of the furnace, and the operating speed of the steel billet is V2; and (5) discharging the subsequent steel billets, and repeating the actions from the first step to the fourth step to carry out steel billet conveying and rolling control. The control method provided by the invention can realize automatic control of billet discharging, can prevent steel piling accidents, improves billet discharging efficiency and steel rolling yield, and reduces labor intensity of post personnel.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a control method for improving the billet ejection efficiency of a heating furnace.
Background
In the steel rolling process, a billet is heated by a heating furnace and then is supplied to a rolling mill for rolling. The billet rolling is one-by-one rolling, the rolling interval time of adjacent billets needs to be controlled within a reasonable range, steel stacking accidents easily occur when the interval time is too short, and the operation efficiency and the yield are affected when the interval time is too long, so that the billet discharging time needs to be accurately controlled.
In the prior art, the steel billet discharging of the heating furnace is manually controlled, an operator observes the rolling progress of the steel billet through naked eyes, and the steel billet discharging is controlled through manual operation. The rolling time of each billet with the length of 12m is less than 40 seconds, an operator needs to frequently operate the knockout control switch, and the method has the following defects:
the method has the advantages that an operator manually controls the discharge of steel billets, the control deviation of the rolling interval time of adjacent steel billets is large, the operation efficiency and the yield are influenced, and steel piling accidents are easy to occur;
due to the fact that the rolling speed is high, an operator continuously and frequently operates the knockout control switch, high concentration and eyesight are needed, labor intensity is high, and fatigue is prone to occurring.
Disclosure of Invention
The invention aims to provide a control method for improving the billet discharging efficiency of a heating furnace.
The invention is realized by the following technical scheme:
a control method for improving the knockout efficiency of a heating furnace comprises the following steps:
setting a single billet rolling period T, namely the time from the rolling start of the front billet to the rolling start of the rear billet;
a first detection switch is arranged at a point A of a furnace outlet of the heating furnace for detecting the tail end of a discharged steel billet, and a second detection switch is arranged at a point B of the rear part of the roughing mill for detecting the front end of a steel billet to be rolled;
then:
T＝T3+T1；
T3＝L3/V
V2＝L2/T3
l3 is the length of the billet;
t3 represents the rolling time of a single billet;
l1 is the distance from point B to the center of the roughing mill roll;
v is the speed of the rough mill for rolling the steel billet, is a fixed value, and the running speed of the steel billet at the L1 section is also V;
l2 is the distance between the front end of the billet to be discharged and the point B;
v2 is the running speed of the billet in the section L2;
after the condition of start rolling is met, post personnel give an automatic billet discharging instruction; the control system automatically controls according to the following steps:
firstly, a billet discharging roller way in a heating furnace starts to operate, and a billet is conveyed to discharge from the furnace, wherein the billet running speed is V2;
secondly, when the tail end of the discharged steel billet passes through the point A, the roller way in the furnace stops running;
thirdly, when the front end of the steel billet runs to the point B, the running speed of the steel billet is adjusted to be V;
fourthly, when the front end of the steel billet enters the roughing mill to start rolling, a roller way in the heating furnace is started to operate, the steel billet is conveyed out of the furnace, and the operating speed of the steel billet is V2;
and (5) discharging the subsequent steel billets, and repeating the actions from the first step to the fourth step to carry out steel billet conveying and rolling control.
Further, the billet discharging can be automatically/manually controlled and switched.
Advantageous effects of the invention
The control method for improving the billet discharging efficiency of the heating furnace has the following advantages:
the automatic control method has the advantages that automatic control of discharging of the steel billets of the heating furnace is realized;
the post personnel weaving can be reduced, the labor cost is reduced, and the labor intensity of the post personnel is reduced;
the invention can improve the discharging efficiency of the steel billet, simultaneously avoid steel stacking accidents caused by too close distance between two adjacent steel billets, and improve the discharging efficiency of the steel billet and the steel rolling yield;
the automatic discharging control method for the billet steel realizes the interlocking control of the automatic discharging and rolling faults of the billet steel, and when the rolling process breaks down, the discharging of the billet steel is automatically stopped, and the manual control is switched.
Description of the drawings:
FIG. 1 is a control flow diagram;
FIG. 2 is a schematic view of an automatic control;
Detailed Description
A control method for improving the knockout efficiency of a heating furnace comprises the following steps:
setting a single billet rolling period T, namely the time from the rolling start of the front billet to the rolling start of the rear billet;
a first detection switch is arranged at a point A of a furnace outlet of the heating furnace for detecting the tail end of a discharged steel billet, and a second detection switch is arranged at a point B of the rear part of the roughing mill for detecting the front end of a steel billet to be rolled;
then:
T＝T3+T1；
T3＝L3/V
V2＝L2/T3
l3 is the length of the billet;
t3 represents the rolling time of a single billet;
l1 is the distance from point B to the center of the roughing mill roller, and can be set according to the rolling process requirement;
v is the speed of the rough mill for rolling the steel billet, is a fixed value, and the running speed of the steel billet at the L1 section is also V;
l2 is the distance between the front end of the billet to be discharged and the point B;
v2 is the running speed of the billet in the section L2;
after the condition of start rolling is met, post personnel give an automatic billet discharging instruction; the control system automatically controls according to the following steps:
firstly, a billet discharging roller way in a heating furnace starts to operate, and a billet is conveyed to discharge from the furnace, wherein the billet running speed is V2;
secondly, when the tail end of the discharged steel billet passes through the point A, the roller way in the furnace stops running;
thirdly, when the front end of the steel billet runs to the point B, the running speed of the steel billet is adjusted to be V;
fourthly, when the front end of the steel billet enters the roughing mill to start rolling, a roller way in the heating furnace is started to operate, the steel billet is conveyed out of the furnace, and the operating speed of the steel billet is V2;
and (5) discharging the subsequent steel billets, and repeating the actions from the first step to the fourth step to carry out steel billet conveying and rolling control.
By adopting the control method, the automatic control of discharging of the steel billets in the heating furnace can be realized, and the rolling time of a single steel billet is determined according to the rolling speed of the roughing mill and the length of the steel billet; according to the distance between the outlet of the heating furnace billet and the blooming mill, the rolling time of a single billet, the rolling interval time and the rolling distance of adjacent billets, the tapping time of the billet after the billet is tapped and the running speed on a roller way are determined, the automatic control of the tapping of the billet can be realized, the steel piling accident caused by the too close distance between two adjacent billets between the billets can be prevented, the tapping efficiency of the billet and the steel rolling yield of the billet are improved, the labor intensity of post personnel is reduced, and even the post personnel are saved.
Further, the billet discharging can be automatically/manually controlled and switched. The system can automatically judge the working state of each rolling mill, and when a fault influencing rolling occurs, the automatic billet discharging system stops automatic billet discharging and switches to manual billet discharging control.
In conclusion, the control method for improving the billet discharging efficiency of the heating furnace, which is protected by the invention, can realize automatic control of billet discharging, prevent steel piling accidents caused by too close distance between two adjacent billets between the billets, improve the billet discharging efficiency and the steel rolling yield, and reduce the labor intensity of post personnel.
Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A control method for improving the knockout efficiency of a heating furnace is characterized by comprising the following steps:
setting a single billet rolling period T, namely the time from the rolling start of the front billet to the rolling start of the rear billet;
a first detection switch is arranged at a point A of a furnace outlet of the heating furnace for detecting the tail end of a discharged steel billet, and a second detection switch is arranged at a point B of the rear part of the roughing mill for detecting the front end of a steel billet to be rolled;
then:
t is the rolling time T3+ of the single billet and the time T1 between the rough rolling end of the front billet and the rough rolling start of the rear billet;
then T3 becomes L3/V
V2＝L2/T3
Wherein L3 is the length of the billet;
t3 represents the rolling time of a single billet;
l1 is the distance from point B to the center of the roughing mill roll;
v is the speed of the rough mill for rolling the steel billet, is a fixed value, and the running speed of the steel billet at the L1 section is also V;
l2 is the distance between the front end of the billet to be discharged and the point B;
v2 is the running speed of the billet in the section L2;
after the condition of start rolling is met, post personnel give an automatic billet discharging instruction; the control system automatically controls according to the following steps:
firstly, a billet discharging roller way in a heating furnace starts to operate, and a billet is conveyed to discharge from the furnace, wherein the billet running speed is V2;
secondly, when the tail end of the discharged steel billet passes through the point A, the roller way in the furnace stops running;
thirdly, when the front end of the steel billet runs to the point B, the running speed of the steel billet is adjusted to be V;
fourthly, when the front end of the steel billet enters the roughing mill to start rolling, a roller way in the heating furnace is started to operate, the steel billet is conveyed out of the furnace, and the operating speed of the steel billet is V2;
and (5) discharging the subsequent steel billets, and repeating the actions from the first step to the fourth step to carry out steel billet conveying and rolling control.
2. The control method for improving the billet-discharging efficiency of the heating furnace according to claim 1, wherein the billet-discharging can be automatically/manually controlled and switched.
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| CN202110108878.7A CN112934976B (en) | 2021-01-27 | 2021-01-27 | Control method for improving billet discharging efficiency of heating furnace |
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| CN112934976B true CN112934976B (en) | 2022-04-08 |
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| CN113634605B (en) * | 2021-08-25 | 2023-02-28 | 重庆钢铁股份有限公司 | Automatic steel splitting control system and method for medium plate steel plate to be rolled based on visual identification |
| CN114850228B (en) * | 2022-04-26 | 2023-12-01 | 广东韶钢松山股份有限公司 | Control method and system for conveying steel billets to rolling mill by heating furnace |
| CN114713631B (en) * | 2022-05-18 | 2024-01-12 | 首钢长治钢铁有限公司 | Rolling production system integration |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701287A (en) * | 2009-10-28 | 2010-05-05 | 南京钢铁股份有限公司 | Method for controlling automatic equidistant steel tapping of heating furnace |
| CN102294361A (en) * | 2010-06-25 | 2011-12-28 | 上海梅山钢铁股份有限公司 | Method for controlling equal-gap steel rolling |
| CN106670241A (en) * | 2017-01-19 | 2017-05-17 | 宣化钢铁集团有限责任公司 | Device and method for shortening continuous tapping time interval of rolled steel production line |
| 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 |
| CN109590336A (en) * | 2018-11-22 | 2019-04-09 | 阳春新钢铁有限责任公司 | A kind of control system and method for steel billet spacing |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701287A (en) * | 2009-10-28 | 2010-05-05 | 南京钢铁股份有限公司 | Method for controlling automatic equidistant steel tapping of heating furnace |
| CN102294361A (en) * | 2010-06-25 | 2011-12-28 | 上海梅山钢铁股份有限公司 | Method for controlling equal-gap steel rolling |
| CN106670241A (en) * | 2017-01-19 | 2017-05-17 | 宣化钢铁集团有限责任公司 | Device and method for shortening continuous tapping time interval of rolled steel production line |
| 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 |
| CN109590336A (en) * | 2018-11-22 | 2019-04-09 | 阳春新钢铁有限责任公司 | A kind of control system and method for steel billet spacing |
Non-Patent Citations (5)
| Title |
|---|
| 宝钢高速线材轧制节奏控制模型研究;张贞宝;《宝钢技术》;20061225(第06期);全文 * |
| 热轧流水线的轧制节奏优化和监控;杨根科等;《上海交通大学学报》;19991130(第11期);全文 * |
| 郭小威.高速线材生产线加热炉出钢节奏优化设计.《天津冶金》.2013,(第04期),全文. * |
| 高线最佳调度控制研究;张贞宝;《宝钢技术》;20031225(第06期);全文 * |
| 高速线材生产线加热炉出钢节奏优化设计;郭小威;《天津冶金》;20130815(第04期);全文 * |
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