CN114618889B - Bar hot rolling production method capable of avoiding 17 # rolling mill steel punching accident - Google Patents
Bar hot rolling production method capable of avoiding 17 # rolling mill steel punching accident Download PDFInfo
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- CN114618889B CN114618889B CN202210289986.3A CN202210289986A CN114618889B CN 114618889 B CN114618889 B CN 114618889B CN 202210289986 A CN202210289986 A CN 202210289986A CN 114618889 B CN114618889 B CN 114618889B
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- water penetrating
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- 238000005096 rolling process Methods 0.000 title claims abstract description 79
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000005098 hot rolling Methods 0.000 title claims abstract description 24
- 238000004080 punching Methods 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 115
- 241000277275 Oncorhynchus mykiss Species 0.000 claims abstract description 53
- 230000000149 penetrating effect Effects 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000010008 shearing Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 5
- 238000011010 flushing procedure Methods 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
-
- 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
- B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
Abstract
The invention relates to the technical field of steel rolling long material production, in particular to a bar hot rolling production method capable of avoiding a 17 # rolling mill steel punching accident, and capable of effectively avoiding the 17 # rolling mill position steel punching accident. The hot rolling device is used for continuously rolling bar materials, a water penetrating device for cooling steel materials is arranged between a No. 16 rolling mill and a No. 17 rolling mill of the hot rolling production line, and a No. 3 shear is arranged between the water penetrating device and the No. 17 rolling mill; the No. 3 shear is used for shearing steel heads of steel which are about to enter the No. 17 rolling mill after passing through the water penetrating device; the water penetrating device is used for outputting steel materials which pass through the water penetrating run-out groove after being output from the No. 16 rolling mill through water cooling treatment, so that the steel materials enter the No. 17 rolling mill, and the steel heads are not subjected to water cooling treatment or the water cooling treatment time is shortened in the process of the water penetrating device.
Description
Technical Field
The invention relates to the technical field of steel rolling long material production, in particular to a bar hot rolling production method capable of avoiding steel stamping accidents of a No. 17 rolling mill.
Background
The two bar lines of the department of steel rolling industry of I department are full continuous rolling bar hot rolling production lines, the annual design productivity is 80 ten thousand tons, and the main production product is a building bar (steel) with the diameter of 18-25 MM. The capacity of the rolling line is increased from year to year after the building and casting in 2006 to the year after 2019, the capacity of the rolling line reaches 100 ten thousand tons, the load exceeds the design capacity by 25%, and equipment accidents are frequently caused by overload in the primary rolling line and the finish rolling area. In March 2020, equipment fault rate reduction, upgrading and reconstruction are performed to reduce the accident rate.
After the steel head of the outlet of the No. 16 rolling mill is updated and transformed in 5 months in 2020, the steel head is subjected to multiple steel flushing when passing through a water running groove with the length of 38 meters to the inlet of the No. 17 rolling mill, and the steel flushing is caused by the process verification: the steel temperature of the steel head is too low, so that the hardness of the steel head is relatively high, and the steel head cannot smoothly enter the frame roller due to the slipping of the steel head when entering the No. 17 rolling mill roller, so that the steel is punched.
Disclosure of Invention
The invention aims at: the bar hot rolling production method can avoid the steel punching accident of the No. 17 rolling mill, and can effectively avoid the steel punching accident of the No. 17 rolling mill.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A bar hot rolling production method capable of avoiding steel rushing accidents of a No. 17 rolling mill is used for a continuous rolling bar hot rolling production line, a water penetrating device for cooling steel is arranged between a No. 16 rolling mill and a No. 17 rolling mill of the hot rolling production line, and a No. 3 shear is arranged between the water penetrating device and the No. 17 rolling mill;
The No. 3 shear is used for shearing steel heads of steel which are about to enter the No. 17 rolling mill after passing through the water penetrating device; the water penetrating device is used for outputting steel materials which pass through the water penetrating run-out groove after being output from the No. 16 rolling mill through water cooling treatment, so that the steel materials enter the No. 17 rolling mill, and the steel heads are not subjected to water cooling treatment or the water cooling treatment time is shortened in the process of the water penetrating device.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the water passing device comprises a water passing running groove formed by sequentially connecting a plurality of water passing coolers in series, a water passing tank is arranged and covered with the water passing running groove, water is directly supplied in parallel to the water inlet pipes of the water passing devices through the high-pressure water main pipe in a unified manner, and independent switch valves are arranged for the water inlet pipes of each water passing device, the plurality of switch valves of the water passing running groove are sequentially divided into a plurality of groups, a plurality of adjacent switch valves are in a group, and when steel heads pass through the water passing running groove, each group or at least one group of switch valve groups at the positions of the steel heads are closed so that the steel heads are not subjected to water cooling treatment or the water cooling treatment time is reduced.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: and a steel head passing detection device is arranged between the water penetrating tank and the No. 16 rolling mill, and the position of the steel head in the water penetrating device is calculated and judged through the steel head identification time and the steel head moving speed.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the steel head detection device comprises a mounting seat used for mounting and fixing, a supporting sleeve is arranged on the mounting seat, an air blowing nozzle fixedly connected with the mounting seat is arranged on the rear side of the supporting sleeve, a hot metal detector is arranged beside the rear side of the air blowing nozzle, steel output from a No. 16 rolling mill passes through the supporting sleeve and passes through the hot metal detector after being blown out of surface residues by blowing nozzle jet high-pressure air flow and enters a water penetrating device, and the hot metal detector is used for detecting and identifying the steel head.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the support sleeve is provided with a horn-shaped guide part near the direction end of the No. 16 rolling mill.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the breaking shear device is arranged at the rear part of the No. 3 shear, and when a steel flushing accident occurs, the breaking shear executes breaking shear instructions.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: and when the breaking and shearing instruction works, the water penetrating device stops water cooling treatment on steel materials output from the No. 16 rolling mill.
The invention has the beneficial effects that:
The bar hot rolling production method capable of avoiding the steel flushing accident of the No. 17 rolling mill is provided, and the bar head of the steel output by the No. 16 rolling mill can smoothly enter the No. 17 rolling mill through the technology related to the method, so that the steel flushing accident is effectively avoided.
Drawings
FIG. 1 is a schematic diagram of a bar hot rolling production system capable of avoiding a 17-mill steel-rushing accident according to the present invention;
fig. 2 is a schematic view of a part of the water penetrating device of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made more fully hereinafter with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention.
As shown in fig. 1, the rod hot rolling production system capable of avoiding the steel rushing accident of the No. 17 rolling mill is shown, and is subjected to investigation analysis: a water passing running groove with the length of 38 meters is formed between the outlet of the No. 16 rolling mill and the inlet of the No. 17 rolling mill (rolled steel needs to be subjected to water passing cooling in order to ensure the metallographic requirement, so that the water passing running groove needs to be added), the water passing pressure requirement of cooling water in a normal temperature state reaches 2.5-2.7MP, the pressure requirement is lower than that of the cooling water, and the metallographic quality of a rolled finished product cannot be ensured. The steel head firstly comes out from the outlet of the No. 16 machine and is flushed by the water penetrating pressure of the water penetrating running groove with the length of 38 meters, when the steel head reaches the inlet of the No. 17 machine, the steel head is too low in temperature and too high in hardness to smoothly enter the inlet of the No. 17 machine, and steel piling at the inlet is caused to produce steel flushing accidents.
Through field investigation:
The steel temperature of the steel head entering the inlet of the machine frame is measured 100 times by an acquisition personnel at the inlet of the machine No. 17, and the situation that 17 times of steel cannot enter the inlet of the machine frame is found, wherein the temperature of the measured steel head is lower than 870 ℃, namely 870 ℃ is a low temperature point of Wen Gangtou where steel punching occurs, and the steel head is the highest temperature (namely the steel temperature cannot exceed 870 ℃) required to ensure that the steel is qualified in rolling. The solution therefore requires controlling the steel head temperature above 870 degrees to ensure access to the mill 17 entry.
The bar hot rolling production method capable of avoiding the steel flushing accident of the No. 17 rolling mill is provided for a continuous rolling bar hot rolling production line, a water penetrating device for cooling steel is arranged between the No. 16 rolling mill and the No. 17 rolling mill of the hot rolling production line, a No. 3 shear is arranged between the water penetrating device and the No. 17 rolling mill, and the No. 3 shear is used for shearing steel heads of the steel which are about to enter the No. 17 rolling mill after passing through the water penetrating device; the water penetrating device is used for outputting steel materials which pass through the water penetrating run-out groove after being output from the No. 16 rolling mill through water cooling treatment, so that the steel materials enter the No. 17 rolling mill, and the steel heads are not subjected to water cooling treatment or the water cooling treatment time is shortened in the process of the water penetrating device.
Further, the water passing device includes a water passing running groove 2 formed by sequentially connecting a plurality of water passing coolers 1 in series, a water passing tank is arranged to cover the water passing running groove, as shown in fig. 1, a water passing device water inlet pipe 3 is unified to be directly connected in parallel to supply water through a high-pressure water main pipe, referring to fig. 2, which is a partial structure schematic diagram of the water passing device of the invention, and a separate switch valve 4 is arranged for each water passing device water inlet pipe 3, the plurality of switch valves 4 of the water passing running groove are sequentially divided into a plurality of groups, a plurality of adjacent switch valves are grouped, and when a steel head passes through the water passing running groove, each group or at least one group of switch valve groups at the position of the steel head is closed so that the steel head is not cooled by water or the water cooling treatment time is reduced.
The current setting on site is that the total length of a water passing running groove of a water passing device is 36 meters, the water passing device comprises a plurality of water passing coolers 1, the water passing coolers 1 are correspondingly divided into 3 groups by a switch valve 4, the water supply pressure is controlled by a cooling total station, and the pressure is 25-27KP, so that the steel output by a No. 16 rolling mill is quickly reduced from 930 ℃ to below 870 ℃ to meet the steel rolling requirement after passing through 38 meters of water before entering the No. 17 rolling mill, and reaches the inlet of the No. 17 rolling mill. The cage of the penetrating water tank can play a role in isolating the working environment and water vapor to a certain extent, can slow down the rapid diffusion of the water vapor, improves the working space environment, and plays a role in safety isolation and protection.
And a steel head passing detection device 5 is arranged between the water penetrating tank and the No. 16 rolling mill, and the position of the steel head in the water penetrating device is calculated and judged through the steel head identification time and the steel head moving speed. Further, the steel head detection device comprises a mounting seat used for mounting and fixing, a supporting sleeve is arranged on the mounting seat, an air blowing nozzle fixedly connected with the mounting seat is arranged on the rear side of the supporting sleeve, a hot metal detector is arranged beside the rear side of the air blowing nozzle, steel output from the No. 16 rolling mill passes through the supporting sleeve and passes through the hot metal detector after being blown out of surface residues by high-pressure air flow through the air blowing nozzle and enters the water penetrating device, and the hot metal detector is used for detecting and identifying the steel head. In order to facilitate the steel head to pass through, the support sleeve is provided with a horn-shaped guide part near the direction end of the No. 16 rolling mill.
Further, a breaking shear device is arranged at the rear part of the No. 3 shear, and when a steel flushing accident occurs, the breaking shear executes breaking shear instructions.
Further, when the breaking and shearing instruction works, the water penetrating device stops water cooling treatment on steel output from the No. 16 rolling mill.
The No. 3 shears are used for shearing steel heads coming out of the outlet of the No. 16 rolling mill and passing through the 3 groups of through water coolers, so that the steel heads are free of defects such as flowering heads, the temperature is not lower than 870 ℃ to smoothly enter the inlet of the No. 17 machine frame, and the breaking shears are used for starting breaking steel shearing functions such as steel flushing accidents. Through field verification, the temperature of the steel head of the method is stabilized above 900 ℃ before entering a No. 17 rolling mill.
The control method, referring to fig. 1, comprises the steps of controlling a switch valve through a PLC control unit, enabling the PLC control unit to be connected with a shredding and shearing device at the rear part of a No. 3 shear so as to send shredding and shearing signals to the shredding and shearing device to execute shredding and shearing instructions, enabling a monitoring device close to a No. 16 rolling mill to be connected with the PLC control unit so as to feed back detection results to the PLC control unit, enabling an operating unit capable of manually executing the control of the PLC control unit to be arranged to be operated, facilitating whole-line control operation, and enabling safety monitoring personnel to quickly pass through the operating unit to execute shredding and shearing signals when a steel flushing accident is identified.
And the switch valve action instruction when the steel head passes through is calculated and programmed by the PLC control system through the detection device and the production line speed. It is worth noting that the switch valves are grouped, rather than individually controlling the switch valves one by one, and compared with individually controlling the switch valves one by one, the grouping has the advantages of saving a PLC output interface, reducing the memory of a PLC program, and improving the stability of a system while guaranteeing the use effect.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. A bar hot rolling production method capable of avoiding steel rushing accidents of a No. 17 rolling mill is used for a continuous rolling bar hot rolling production line, a water penetrating device for cooling steel is arranged between a No. 16 rolling mill and a No. 17 rolling mill of the hot rolling production line, and a No. 3 shear is arranged between the water penetrating device and the No. 17 rolling mill;
The method is characterized in that: the No. 3 shear is used for shearing steel heads of steel which are about to enter the No. 17 rolling mill after passing through the water penetrating device; the water penetrating device is used for outputting steel materials which pass through a water penetrating run-out groove after being output from the No. 16 rolling mill through water cooling treatment, so that the steel materials enter the No. 17 rolling mill, and the steel heads are not subjected to water cooling treatment or the water cooling treatment time is reduced in the process of passing through the water penetrating device;
the water penetrating device comprises a water penetrating running groove formed by sequentially connecting a plurality of water penetrating coolers in series, a water penetrating tank is arranged and covered with the water penetrating running groove, water is directly supplied in parallel to a water inlet pipe of the water penetrating device through a high-pressure water main pipe, and each water inlet pipe of the water penetrating device is provided with a separate switch valve, the plurality of switch valves of the water penetrating running groove are sequentially divided into a plurality of groups, a plurality of adjacent switch valves are grouped, and when a steel head passes through the water penetrating running groove, each group or at least one group of switch valve groups at the position of the steel head is closed so that the steel head is not subjected to water cooling treatment or the water cooling treatment time is reduced;
And a steel head passing detection device is arranged between the water penetrating tank and the No. 16 rolling mill, and the position of the steel head in the water penetrating device is calculated and judged through the steel head identification time and the steel head moving speed.
2. The bar hot rolling production method capable of avoiding steel rushing accidents of No. 17 rolling mill according to claim 1, characterized by comprising the following steps: the steel head detection device comprises a mounting seat used for mounting and fixing, a supporting sleeve is arranged on the mounting seat, an air blowing nozzle fixedly connected with the mounting seat is arranged on the rear side of the supporting sleeve, a hot metal detector is arranged beside the rear side of the air blowing nozzle, steel output from a No. 16 rolling mill passes through the supporting sleeve and passes through the hot metal detector after being blown out of surface residues by blowing nozzle jet high-pressure air flow and enters a water penetrating device, and the hot metal detector is used for detecting and identifying the steel head.
3. The bar hot rolling production method capable of avoiding steel rushing accidents of No. 17 rolling mill according to claim 2, characterized by comprising the following steps: the support sleeve is provided with a horn-shaped guide part near the direction end of the No. 16 rolling mill.
4. The bar hot rolling production method capable of avoiding steel rushing accidents of No. 17 rolling mill according to claim 1, characterized by comprising the following steps: the breaking shear device is arranged at the rear part of the No. 3 shear, and when a steel flushing accident occurs, the breaking shear executes breaking shear instructions.
5. The bar hot rolling production method capable of avoiding steel rushing accidents of No. 17 rolling mill according to claim 4, characterized by comprising the following steps: and when the breaking and shearing instruction works, the water penetrating device stops water cooling treatment on steel materials output from the No. 16 rolling mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210289986.3A CN114618889B (en) | 2022-03-23 | 2022-03-23 | Bar hot rolling production method capable of avoiding 17 # rolling mill steel punching accident |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210289986.3A CN114618889B (en) | 2022-03-23 | 2022-03-23 | Bar hot rolling production method capable of avoiding 17 # rolling mill steel punching accident |
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| Publication Number | Publication Date |
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| CN114618889A CN114618889A (en) | 2022-06-14 |
| CN114618889B true CN114618889B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210289986.3A Active CN114618889B (en) | 2022-03-23 | 2022-03-23 | Bar hot rolling production method capable of avoiding 17 # rolling mill steel punching accident |
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Families Citing this family (1)
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| CN114505355A (en) * | 2022-03-23 | 2022-05-17 | 首钢水城钢铁（集团）有限责任公司 | Steel head detection system for controlling temperature of steel head at water penetration section |
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| CN107377632A (en) * | 2017-08-11 | 2017-11-24 | 张家港联峰钢铁研究所有限公司 | It is a kind of to reduce reinforcing bar size poor temperature control system and operating method end to end |
-
2022
- 2022-03-23 CN CN202210289986.3A patent/CN114618889B/en active Active
Patent Citations (10)
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| JPH06122015A (en) * | 1992-10-13 | 1994-05-06 | Nippon Steel Corp | Method for water cooling steel bar/wire rod |
| JP2007160316A (en) * | 2005-12-09 | 2007-06-28 | Kobe Steel Ltd | Method for controlling water cooling of rolled material |
| CN201532585U (en) * | 2009-11-24 | 2010-07-21 | 青岛钢铁控股集团有限责任公司 | Temperature control system for easily cut steel |
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| CN204397050U (en) * | 2014-12-01 | 2015-06-17 | 方大特钢科技股份有限公司 | Flying shear crop accuracy control system |
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| CN114618889A (en) | 2022-06-14 |
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