CN112718880A - Tapping temperature control system of rod and wire heating furnace and operation method thereof - Google Patents
Tapping temperature control system of rod and wire heating furnace and operation method thereof Download PDFInfo
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- CN112718880A CN112718880A CN202011470857.1A CN202011470857A CN112718880A CN 112718880 A CN112718880 A CN 112718880A CN 202011470857 A CN202011470857 A CN 202011470857A CN 112718880 A CN112718880 A CN 112718880A
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- tapping
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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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B2038/004—Measuring scale thickness
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses a steel tapping temperature control system of a rod and wire heating furnace and an operation method thereof. The pyrometers are arranged at key positions, the temperature distribution of the whole length of the running steel billet is detected, and when the detection result does not meet the tapping temperature requirement, the timing function block and the tapping roller way controller are controlled, so that the heating time is prolonged moderately. The invention simplifies the temperature monitoring and temperature adjusting modes and ensures the product quality and stability.
Description
Technical Field
The invention belongs to the field of automatic control, and particularly relates to a tapping temperature control system of a rod and wire heating furnace and an operation method thereof.
Background
In the rod and wire production process, the heating control of the steel billet is very important, when the tapping temperature is lower than the target temperature or the heating of the whole steel billet is uneven, on one hand, the stability of the product quality can be influenced, and on the other hand, the gear box of the rolling mill can be damaged by low-temperature steel rolling. Therefore, there is a need to control the heating process in rod and wire production to improve product quality and avoid mill gear damage.
CN103225017A discloses a method and a device for controlling a rod and wire square billet heating furnace model, which comprises the steps of utilizing a PLC to control the furnace temperature of the heating furnace in a partition mode, setting three thermocouples in the furnace width direction of each section of the heating furnace respectively, quickly and stably tracking and determining the head, middle and tail temperature of a steel billet, and simultaneously combining a radiation pyrometer according to a rough rolling inlet to accurately control the head and tail temperature distribution of the steel billet. However, the invention has too many monitoring points for the temperature of the steel billet and too complex adjusting mode, and the monitoring points can be arranged at key parts to meet the tapping temperature requirement in a mode of properly prolonging the heating time.
Disclosure of Invention
The invention aims to provide a tapping temperature control system of a rod and wire heating furnace and an operation method thereof, which simplify temperature monitoring and temperature adjusting modes and ensure product quality and stability.
The purpose of the invention is realized by the following technical scheme: a tapping temperature control system of a rod and wire heating furnace comprises a pyrometer, a timing function block and a tapping roller channel controller; the pyrometer is arranged between the roughing mill and the finishing mill, the timing function block and the steel outlet roller channel controller are arranged at a steel tapping hole of the heating furnace, and the pyrometer is electrically connected with the steel outlet roller channel controller through the timing function block to control steel billet steel tapping or delay steel tapping.
The operation method of the tapping temperature control system of the bar and wire heating furnace comprises the following steps:
step 1: the steel outlet roller way controller controls the steel outlet roller way to output the steel billet from the heating furnace;
step 2: after dephosphorization and rough rolling, conveying the steel billet to a pyrometer, and detecting the full-length temperature of the steel billet;
and step 3: when the full-length temperature of the steel billet meets the tapping temperature requirement, the timing function block is closed, and the tapping roller channel controller controls the heating furnace to tap steel; when the full-length temperature of the steel billet does not meet the requirement of the tapping temperature, the timing function block is started, the tapping roller channel controller controls the heating furnace to delay tapping, and the heating time of the steel billet in the heating furnace is prolonged.
Preferably, the tapping temperature requirement in the step 3 is as follows: the times of more than 2s when the temperature of the whole length of the billet is lower than the lower limit temperature are less than 5 times, and the continuous time when the temperature of the whole length of the billet is lower than the lower limit temperature is less than 10 s.
Preferably, the set time = the number of fluctuations of the detected temperature below the lower limit temperature by 30S and not more than 5min in the timing function block in step 3.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention detects the temperature distribution of the whole length of the steel billet in operation by arranging the pyrometer between the roughing mill and the finishing mill, controls the temperature and the temperature distribution of the steel billet entering the finishing process, ensures the product quality and avoids the gear damage of the rolling mill.
2) According to the invention, steel blank tapping or delayed steel tapping is controlled according to the detection result of the pyrometer, and the delayed steel tapping time is calculated according to the fluctuation times of the detected temperature lower than the lower limit temperature which is 30S and not more than 5min, so that the heating time of the steel blank in the heating furnace is prolonged to meet the steel tapping temperature requirement.
3) According to the invention, through a tapping temperature control system consisting of the pyrometer, the timing function block and the tapping roller channel controller, monitoring points are arranged at key positions, so that the tapping temperature requirement is met in a mode of properly prolonging the heating time, the temperature monitoring and temperature adjusting modes are simplified, and the product quality and stability are ensured.
Drawings
FIG. 1 is a schematic view showing tapping temperature control of a rod and wire heating furnace according to the present invention;
FIG. 2 is a graph of the full length temperature of the steel billet detected by the pyrometer of the present invention (the abscissa scale is 2 s);
FIG. 3 is a graph of the full length temperature of the next billet measured by the pyrometer of the present invention (the scale on the abscissa is 2 s).
The method comprises the following steps of 1-heating furnace, 2-steel tapping roller way, 3-timing function block, 4-steel tapping roller way controller, 5-dephosphorization machine, 6-roughing mill, 7-pyrometer, 8-finishing mill and 9-billet.
Detailed Description
The invention is further explained in detail with reference to the drawings and examples.
Example 1
As shown in figure 1, the production process of the steel billet 9 sequentially comprises heating of a heating furnace 1, dephosphorization of a dephosphorization machine 5, rough rolling of a mill 6 and finishing rolling of a mill 8, and the steel billet is conveyed by a tapping roller table 2. In the steel tapping temperature control system of the bar and wire heating furnace, a pyrometer 7 is arranged between a roughing mill 6 and a finishing mill 8 to detect the full-length temperature of a steel billet 9, a timing function block 3 and a steel tapping roller channel controller 4 are arranged at a steel tapping hole of the heating furnace 1, and the pyrometer 7 is electrically connected with the steel tapping roller channel controller 4 through the timing function block 3 to control the steel billet 9 to tap or delay the steel tapping.
The overall length temperature measurement results of the billet 9 are shown in fig. 2: the number of times of being 2s or more below the lower limit temperature is 6; the continuous time below the lower limit temperature is 18s, which does not meet the tapping temperature requirement. And the timing function block 3 is started, the delay time is set to be 6 × 30S =3min, the steel-out roller controller 4 stops outputting the next steel billet from the steel outlet of the heating furnace 1 within the time, and the subsequent steel billet is made to stay in the heating furnace 1 for continuous heating. And after the delayed tapping time is reached, the timing function block 3 is closed, the tapping roller channel controller 4 controls the heating furnace 1 to tap steel, the full-length temperature of the steel billet is detected by the pyrometer 7 again after dephosphorization and rough rolling, the detection result is shown in figure 3, the steel tapping temperature requirement is met, the timing function block 3 is closed, and the tapping roller channel controller 4 controls the heating furnace 1 to continue tapping.
The heating furnace PLC system automatically counts the number N of steel billets with unqualified tapping temperature of each production class, the tapping temperature control system N is reduced by 30%, the product quality stability is improved, the damage probability of a gear box is reduced, and the fault of the gear box is reduced by 20%.
The scope of the present invention is not limited to the above embodiments, and modifications made by those skilled in the art without departing from the spirit and scope of the inventive concept are within the scope of the present invention.
Claims (4)
1. A tapping temperature control system of a rod and wire heating furnace is characterized by comprising a pyrometer, a timing function block and a tapping roller channel controller; the pyrometer is arranged between the roughing mill and the finishing mill, the timing function block and the steel outlet roller channel controller are arranged at a steel tapping hole of the heating furnace, and the pyrometer is electrically connected with the steel outlet roller channel controller through the timing function block to control steel billet steel tapping or delay steel tapping.
2. The operation method of the tapping temperature control system of the rod-and-wire heating furnace according to claim 1, comprising the steps of:
step 1: the steel outlet roller way controller controls the steel outlet roller way to output the steel billet from the heating furnace;
step 2: after dephosphorization and primary rough rolling, conveying the steel billet to a pyrometer, and detecting the full-length temperature of the steel billet;
and step 3: when the full-length temperature of the steel billet meets the tapping temperature requirement, the timing function block is closed, and the tapping roller channel controller controls the heating furnace to tap steel; when the full-length temperature of the steel billet does not meet the requirement of the tapping temperature, the timing function block is started, the tapping roller channel controller controls the heating furnace to delay tapping, and the heating time of the steel billet in the heating furnace is prolonged.
3. The operating method of the tapping temperature control system for a rod-and-wire heating furnace according to claim 2, wherein the tapping temperature requirement in the step 3 is: the times of more than 2s when the temperature of the whole length of the billet is lower than the lower limit temperature are less than 5 times, and the continuous time when the temperature of the whole length of the billet is lower than the lower limit temperature is less than 10 s.
4. The method for operating the tapping temperature control system for the rod and wire heating furnace according to claim 2, wherein the set time of the timing function block in the step 3 = the number of fluctuations of the detected temperature below the lower limit temperature x 30S and does not exceed 5 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011470857.1A CN112718880A (en) | 2020-12-14 | 2020-12-14 | Tapping temperature control system of rod and wire heating furnace and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011470857.1A CN112718880A (en) | 2020-12-14 | 2020-12-14 | Tapping temperature control system of rod and wire heating furnace and operation method thereof |
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| CN112718880A true CN112718880A (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011470857.1A Pending CN112718880A (en) | 2020-12-14 | 2020-12-14 | Tapping temperature control system of rod and wire heating furnace and operation method thereof |
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| CN (1) | CN112718880A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751512A (en) * | 2021-08-13 | 2021-12-07 | 福建三钢闽光股份有限公司 | Method and device for measuring length of high-speed wire non-cooling section |
| CN114054520A (en) * | 2021-10-22 | 2022-02-18 | 山东莱钢永锋钢铁有限公司 | Automatic control production interval control device for head, top and tail of rolling line |
| CN115069781A (en) * | 2022-06-06 | 2022-09-20 | 福建三宝钢铁有限公司 | Controlled rolling and controlled cooling production process of HRB400E nuclear power steel |
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| CN103019150A (en) * | 2012-12-07 | 2013-04-03 | 江苏永钢集团有限公司 | Walking beam type heating furnace automatic steel tapping control system and control method thereof |
| CN203012430U (en) * | 2012-12-07 | 2013-06-19 | 江苏永钢集团有限公司 | Automatic steel tapping control system of stepping girder type heating furnace |
| CN103331309A (en) * | 2013-06-09 | 2013-10-02 | 山西太钢不锈钢股份有限公司 | Automatic temperature-control and rolling-control device for reversible type rolling mill |
| CN103529745A (en) * | 2013-09-27 | 2014-01-22 | 北京佰能电气技术有限公司 | Heating furnace tapping control system, device and method |
| CN104923575A (en) * | 2015-05-28 | 2015-09-23 | 柳州钢铁股份有限公司 | Method for controlling steel rolling temperature |
| CN110877049A (en) * | 2019-12-16 | 2020-03-13 | 钢铁研究总院 | Temperature equalizing method for high-temperature billet passing through heating furnace |
| CN111809040A (en) * | 2020-06-10 | 2020-10-23 | 深圳城市节能环保科技有限公司 | Control method and device for steel rolling heating furnace |
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2020
- 2020-12-14 CN CN202011470857.1A patent/CN112718880A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103019150A (en) * | 2012-12-07 | 2013-04-03 | 江苏永钢集团有限公司 | Walking beam type heating furnace automatic steel tapping control system and control method thereof |
| CN203012430U (en) * | 2012-12-07 | 2013-06-19 | 江苏永钢集团有限公司 | Automatic steel tapping control system of stepping girder type heating furnace |
| CN103331309A (en) * | 2013-06-09 | 2013-10-02 | 山西太钢不锈钢股份有限公司 | Automatic temperature-control and rolling-control device for reversible type rolling mill |
| CN103529745A (en) * | 2013-09-27 | 2014-01-22 | 北京佰能电气技术有限公司 | Heating furnace tapping control system, device and method |
| CN104923575A (en) * | 2015-05-28 | 2015-09-23 | 柳州钢铁股份有限公司 | Method for controlling steel rolling temperature |
| CN110877049A (en) * | 2019-12-16 | 2020-03-13 | 钢铁研究总院 | Temperature equalizing method for high-temperature billet passing through heating furnace |
| CN111809040A (en) * | 2020-06-10 | 2020-10-23 | 深圳城市节能环保科技有限公司 | Control method and device for steel rolling heating furnace |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751512A (en) * | 2021-08-13 | 2021-12-07 | 福建三钢闽光股份有限公司 | Method and device for measuring length of high-speed wire non-cooling section |
| CN114054520A (en) * | 2021-10-22 | 2022-02-18 | 山东莱钢永锋钢铁有限公司 | Automatic control production interval control device for head, top and tail of rolling line |
| CN115069781A (en) * | 2022-06-06 | 2022-09-20 | 福建三宝钢铁有限公司 | Controlled rolling and controlled cooling production process of HRB400E nuclear power steel |
| CN115069781B (en) * | 2022-06-06 | 2024-04-12 | 福建三宝钢铁有限公司 | Rolling and cooling control production process of HRB400E nuclear power steel |
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Application publication date: 20210430 |