CN112453054A - Continuous casting billet rolling system - Google Patents
Continuous casting billet rolling system Download PDFInfo
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- CN112453054A CN112453054A CN202010996727.5A CN202010996727A CN112453054A CN 112453054 A CN112453054 A CN 112453054A CN 202010996727 A CN202010996727 A CN 202010996727A CN 112453054 A CN112453054 A CN 112453054A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
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- 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
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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
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
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- 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
- B21B45/004—Heating the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Metal Rolling (AREA)
Abstract
The invention is suitable for the technical field of steel rolling, and provides a continuous casting billet rolling system, which comprises: the control module and the continuous casting billet rolling equipment; the continuous casting slab rolling equipment comprises: the continuous casting machine comprises a casting machine, a cutting machine, a conveying roller way, a billet discharging roller way, a quick roller way, a cantilever roller way, a first machine front roller way, an induction furnace, a second machine front roller way and a rolling machine which are sequentially arranged according to the advancing direction of a continuous casting billet. The invention can sort and supplement heat to the cut continuous casting billet and quickly convey the continuous casting billet to the rolling mill, thereby realizing the direct rolling of the continuous casting billet.
Description
Technical Field
The invention belongs to the technical field of steel rolling, and particularly relates to a continuous casting billet rolling system.
Background
In the production process of the rod and wire, the gas consumption cost of the heating furnace accounts for more than 50% of the rolling cost, so the most important measure for reducing the rolling cost is to reduce the gas consumption cost. At present, the heat compensation by using a medium-frequency induction furnace is a feasible method.
However, in order to ensure that the concurrent heating effect of the induction furnace can meet the heating requirement of the continuous casting billet, the continuous casting billet needs to be directly rolled, and the influence of various factors such as temperature loss of the continuous casting billet, rhythm control of the rolling process, accurate control of concurrent heating of the induction furnace and the like is considered to be reduced in the direct rolling process, so that the prior art lacks of a comprehensive direct rolling strategy.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a continuous casting billet rolling system to realize direct rolling of a continuous casting billet.
The embodiment of the invention provides a continuous casting billet rolling system, which comprises:
the control module and the continuous casting billet rolling equipment;
the continuous casting billet rolling equipment comprises: the continuous casting machine comprises a casting machine, a cutting machine, a conveying roller way, a billet discharging roller way, a quick roller way, a cantilever roller way, a first machine front roller way, an induction furnace, a second machine front roller way and a rolling mill which are sequentially arranged according to the advancing direction of a continuous casting billet;
the control module is used for carrying out logic control on continuous casting billet rolling equipment; the casting machine is used for producing continuous casting billets; the cutting machine is used for cutting the continuous casting billet; the conveying roller way is used for conveying the cut continuous casting billets to the knockout roller way; the ejection roller way is used for sorting the continuous casting billets; the quick roller way is used for conveying the continuous casting billet from the billet discharging roller way to the cantilever roller way at a high speed; the cantilever roller way is used for reducing the speed of the continuous casting billet; the first front roller way is used for realizing the speed connection between the cantilever roller way and the roller way in the induction furnace; the induction furnace is used for supplementing heat to the continuous casting billet; the second front roller way is used for realizing the speed connection between the roller way in the induction furnace and the rolling mill; the rolling mill is used for rolling continuous casting billets.
Optionally, a first thermal detection device is arranged at an outlet of the cutting machine, and the first thermal detection device is used for acquiring a first temperature signal of each continuous casting billet and sending the first temperature signal to the control module; the second thermal detection device is arranged on the conveying roller way and is used for collecting second temperature signals of the continuous casting billets and sending the second temperature signals to the control module;
the control module determines the roller way speed of the conveying roller way according to the second temperature signal, calculates the predicted temperature when the continuous casting billet reaches the ejection roller way based on the first temperature signal, the roller way speed and a preset continuous casting billet temperature drop model, and determines the sequence of the continuous casting billet entering the conveying roller way according to the predicted temperature.
Optionally, a third thermal detection device is arranged at a preset position of the fast roller way, and the third thermal detection device is used for collecting a third temperature signal of each continuous casting billet and sending the third temperature signal to the control module;
and the control module controls the interval of the continuous casting billet entering the quick roller way according to the third temperature signal.
Optionally, a fourth thermal detection device is arranged at the inlet of the induction furnace, and the fourth thermal detection device is used for collecting a fourth temperature signal of the continuous casting billet at a preset frequency and sending the fourth temperature signal to the control module when one end of the continuous casting billet reaches the inlet of the induction furnace; a fifth thermal detection device is arranged at the outlet of the induction furnace and is used for collecting a fifth temperature signal of the continuous casting billet at a preset frequency and sending the fifth temperature signal to the control module when one end of the continuous casting billet reaches the outlet of the induction furnace;
the control module determines the inlet temperature of the induction furnace of the continuous casting billet according to the fourth temperature signal, determines the outlet temperature of the induction furnace of the continuous casting billet according to the fifth temperature signal, and adjusts the roller way speed of the roller way in the induction furnace based on the inlet temperature of the induction furnace and the outlet temperature of the induction furnace.
Optionally, confirm the induction furnace inlet temperature of continuous casting billet according to the fourth temperature signal, confirm the induction furnace outlet temperature of continuous casting billet according to the fifth temperature signal to adjust the roller table speed of roller way in the induction furnace according to induction furnace inlet temperature and induction furnace outlet temperature, include:
calculating the average value of the fourth temperature signal to obtain the inlet temperature of the induction furnace of the continuous casting billet;
calculating the average value of the fifth temperature signal to obtain the outlet temperature of the induction furnace of the continuous casting billet;
and determining the current value of the roller way speed of the roller way in the induction furnace based on the inlet temperature of the induction furnace and the outlet temperature of the induction furnace, and adjusting the current value of the roller way speed according to the inlet temperature of the induction furnace of the next continuous casting billet.
Optionally, the rollgang comprises a first rollgang, a second rollgang and a third rollgang which are sequentially arranged according to the advancing direction of the continuous casting billet;
the first conveying roller way and the third conveying roller way are of a single-flow centralized transmission structure, and the second conveying roller way is of a multi-flow shared long roller transmission structure.
Optionally, the fast roller ways comprise a first fast roller way, a second fast roller way, a third fast roller way and a fourth fast roller way which are sequentially arranged according to the advancing direction of the continuous casting billet;
the first quick roller way is of a long roller transmission structure shared by multiple streams, the roller length is gradually shortened, and the roller length at the tail end of the first quick roller way is equal to that of the second quick roller way;
the second rapid roller way, the third rapid roller way and the fourth rapid roller way are of a single-flow centralized transmission structure.
Optionally, a sixth thermal detection device is arranged on the roller way in the induction furnace, and the sixth thermal detection device is used for collecting a sixth temperature signal of the continuous casting billet and sending the sixth temperature signal to the control module;
the control module monitors the sixth temperature signal, and when the control module continuously receives the sixth temperature signal and exceeds a first preset time threshold, an abnormal alarm is given;
or when the control module does not receive that the sixth temperature signal exceeds the second preset time threshold, performing abnormity alarm.
Optionally, an infrared camera is arranged on the ejection roller way and used for collecting image information of each continuous casting billet on the ejection roller way and sending the image information to the control module;
and the control module determines the residence time of each continuous casting billet on the knockout roller according to the image information and gives an overtime alarm to the continuous casting billet of which the residence time is greater than a third preset time threshold.
Optionally, the conveying roller way and the quick roller way are both provided with heat preservation devices, and the heat preservation devices are used for reducing heat loss of the continuous casting billets in the conveying process.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the invention, the conveying roller way, the knockout roller way, the quick roller way, the cantilever roller way, the first machine front roller way, the induction furnace and the second machine front roller way are arranged between the cutting machine and the rolling mill, so that a direct conveying channel of the continuous casting billet is established, the cut continuous casting billet can be sorted and heated, and can be quickly conveyed to the rolling mill, the direct rolling of the continuous casting billet is realized, and the temperature loss of the continuous casting billet is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a slab rolling system according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
A first aspect of an embodiment of the present invention provides a continuous casting slab rolling system, and referring to fig. 1, the continuous casting slab rolling system 100 includes:
a control module 101 and a continuous casting billet rolling device 102; the slab rolling apparatus 102 includes: the continuous casting machine comprises a casting machine 1, a cutting machine 2, a conveying roller way 3, a knockout roller way 4, a quick roller way 5, a cantilever roller way 6, a first machine front roller way 7, an induction furnace 8, a second machine front roller way 9 and a rolling mill 10 which are sequentially arranged according to the advancing direction of a continuous casting blank;
the control module 101 is used for carrying out logic control on the continuous casting billet rolling equipment 102; the casting machine 1 is used for producing continuous casting billets; the cutting machine 2 is used for cutting the continuous casting billet; the conveying roller way 3 is used for conveying the cut continuous casting billets to the knockout roller way 4; the knockout roller table 4 is used for sorting the continuous casting billets; the quick roller way 5 is used for conveying the continuous casting billet from the knockout roller way 4 to the cantilever roller way 6 at a high speed; the cantilever roller bed 6 is used for reducing the speed of the continuous casting billet; the first machine front roller way 7 is used for realizing the speed connection between the cantilever roller way 6 and the roller way in the induction furnace 8; the induction furnace 8 is used for supplementing heat to the continuous casting billet; the second front roller way 9 is used for realizing the speed connection between the roller way in the induction furnace 8 and the rolling mill 10; the rolling mill 10 is used for rolling a continuous cast slab.
In the embodiment of the invention, in order to improve the temperature of the continuous casting billet and reduce the temperature loss of the continuous casting billet, the casting machine 1 is improved, an eight-machine eight-flow casting machine which is commonly used is changed into a six-machine six-flow casting machine, the sizing water gap of the casting machine 1 is changed from 17mm to 19mm, the drawing speed is increased from 1.8-1.9m/min to 2.5-2.7m/min, and the temperature of the continuous casting billet after cutting is up to more than 1100 ℃; after the pulling speed is raised, the system optimization of secondary cooling water distribution is completed, and the method comprises the following steps: the method changes manual water distribution into automation, increases foot rollers of the crystallizer, sprays, optimizes the arrangement of spray headers, improves a secondary cooling system and the like, reduces the cooling strength as much as possible under the condition of ensuring the full solidification of the core part of the continuous casting billet during cutting, better utilizes the solidification latent heat, and improves the temperature of the casting billet.
The cutting machine 2 is used for cutting the continuous casting billet to length.
The rated speed of the conveying roller way 3 is 90 m/min, and the function of the conveying roller way is to convey the continuous casting billets from the cutting machine 2 to the knockout roller way 4.
The ejection roller ways 4 are divided into two groups, each three flows share one group, the rated speed is 120 m/min, and the ejection roller ways 4 are used for sorting the continuous casting billets sent to the quick roller ways 5 and the continuous casting billets needing to be off-line.
The rated speed of the quick roller way 5 reaches 200 m/min, and the continuous casting billet can be conveyed to the cantilever roller way 6 from the knockout roller way 4 at a high speed, so that the temperature loss of the continuous casting billet in the conveying process is reduced.
The rated speed of the cantilever roller bed 6 is 60 m/min, and the transition of the continuous casting billet from high speed to low speed can be completed.
The first machine front roller way 7 is used for realizing speed connection between the cantilever roller way 6 and the roller way in the induction furnace 8, the second machine front roller way 9 is used for realizing speed connection between the roller way in the induction furnace 8 and the rolling mill 10, and the control module 101 can perform self-adaptive adjustment on the speed of the first machine front roller way 7 and the speed of the second machine front roller way 9 according to the speed of the roller way in the induction furnace 8.
The induction furnace 8 can be a medium-frequency induction furnace adopting a parallel resonance inversion principle, and can effectively avoid the power grid from generating higher harmonics and improve the heating efficiency through an inversion loop multiplexing technology.
Optionally, the rollgang 3 includes a first rollgang 301, a second rollgang 302 and a third rollgang 303, which are sequentially arranged according to the advancing direction of the continuous casting slab;
the first conveying roller way 301 and the third conveying roller way 303 are of a single-flow centralized transmission structure, and the second conveying roller way 302 is of a multi-flow shared long roller transmission structure.
Optionally, the fast roller way 5 includes a first fast roller way 501, a second fast roller way 502, a third fast roller way 503 and a fourth fast roller way 504 which are sequentially arranged according to the advancing direction of the continuous casting slab;
the first fast roller bed 501 is a multi-stream shared long roller transmission structure, the roller length is gradually shortened, and the roller length at the tail end of the first fast roller bed 501 is equal to that of the second fast roller bed 502;
the second fast roller way 502, the third fast roller way 503 and the fourth fast roller way 504 are of a single-flow centralized transmission structure.
In the embodiment of the invention, the first fast roller bed 501 is used for completing the conversion of conveying a continuous casting billet from a multi-flow conveying to a single-flow conveying, is of a long roller transmission structure shared by multiple flows, and has a gradually shortened roller length which is finally equal to that of the second fast roller bed 502; the second fast roller way 502, the third fast roller way 503 and the fourth fast roller way 504 are of a single-flow centralized transmission structure, and the roller lengths are equal, and are used for rapidly conveying single-flow continuous casting billets to the cantilever roller way 6.
Optionally, a first thermal detection device 11 is arranged at an outlet of the cutting machine 2, and the first thermal detection device 11 is configured to collect a first temperature signal of each continuous casting slab and send the first temperature signal to the control module 101; the second thermal detection device 12 is arranged on the conveying roller way 3, and the second thermal detection device 12 is used for collecting a second temperature signal of each continuous casting billet and sending the second temperature signal to the control module 101;
the control module 101 determines the roller speed of the conveying roller way 3 according to the second temperature signal, calculates the predicted temperature of the continuous casting billet when the continuous casting billet reaches the ejection roller way 4 based on the first temperature signal, the roller speed and a preset continuous casting billet temperature drop model, and determines the sequence of the continuous casting billet entering the conveying roller way 3 according to the predicted temperature.
In the embodiment of the present invention, a plurality of second thermal detection devices 12 may be disposed on the rollgang 3 to improve the detection accuracy, for example, the second thermal detection device 121 is disposed on the first rollgang 301, the second thermal detection device 122 is disposed on the second rollgang 302, and the second thermal detection device 123 is disposed on the third rollgang 303, so that the rollgang speed of the rollgang 3 can be calculated according to the distance between two adjacent second thermal detection devices and the time interval of the continuous casting slab passing through the two second thermal detection devices, and the predicted temperature of the continuous casting slab when reaching the slab exit rollgang 4 can be calculated. According to the predicted temperature when the continuous casting billets reach the knockout roller table 4, the continuous casting billets can be sequenced, and the continuous casting billets with low predicted temperature are preferentially conveyed.
Optionally, a third thermal detection device 13 is arranged at a preset position of the fast roller way 5, and the third thermal detection device 13 is used for acquiring a third temperature signal of each continuous casting billet and sending the third temperature signal to the control module 101;
and the control module 101 controls the interval of the continuous casting billet entering the quick roller way 5 according to the third temperature signal.
In the embodiment of the invention, a lifting baffle plate is arranged at the outlet of the ejection roller way 4, a third thermal detection device 13 is arranged at a preset position of the rapid roller way 5, and when the third thermal detection device 13 detects a third temperature signal and sends the third temperature signal to the control module 101, the control module 101 controls the lifting baffle plate of the ejection roller way 4 to lift, so that the next continuous casting billet is sent into the rapid roller way 5, a certain distance is kept between two adjacent continuous casting billets, and the rhythm control of direct rolling of the continuous casting billets is realized. It should be noted that the number and the preset positions of the third thermal detection devices 13 can be set according to actual needs, and the application is not limited thereto. In addition, post staff can also sort the continuous casting billet through the self-control lifting baffle, and the continuous casting billet that will need to be taken off the production line is taken off the production line.
For example, in the embodiment of the present invention, the third thermal inspection device 131 is disposed at a preset position of the first fast roller bed 501, the third thermal inspection device 132 is disposed at a preset position of the second fast roller bed 502, the third thermal inspection device 133 is disposed at a preset position of the third fast roller bed 503, and the third thermal inspection device 134 is disposed at a preset position of the fourth fast roller bed 504.
When rolling 20-spiral gauge products at an ambient temperature of 35 ℃, the drawing speed is set to 2.65 m/min, and 6-strand drawing steel is continuously cast. When the previous continuous casting billet reaches the third thermal detection device 133, the discharging roller table 4 starts to send the next continuous casting billet, so that the rolling rhythm can be 48 s/billet, and 75 billets can be rolled in each hour.
When rolling a 18-spiral gauge product at an ambient temperature of 5 ℃, the draw rate was set to 2.65 m/min, and 5-strand steel was continuously cast. When the previous continuous casting billet reaches the fourth thermal detection device 134, the discharging roller table 4 starts to send the next continuous casting billet, so that the rolling rhythm can be 55 s/billet, and 65 billets can be rolled per hour.
Optionally, a fourth thermal detection device 14 is arranged at the inlet of the induction furnace 8, and the fourth thermal detection device 14 is configured to collect a fourth temperature signal of the continuous casting slab at a preset frequency and send the fourth temperature signal to the control module 101 when one end of the continuous casting slab reaches the inlet of the induction furnace 8; a fifth thermal detection device 15 is arranged at the outlet of the induction furnace 8, and the fifth thermal detection device 15 is used for collecting a fifth temperature signal of the continuous casting billet at a preset frequency and sending the fifth temperature signal to the control module 101 when one end of the continuous casting billet reaches the outlet of the induction furnace 8;
the control module 101 determines the induction furnace inlet temperature of the continuous casting billet according to the fourth temperature signal, determines the induction furnace outlet temperature of the continuous casting billet according to the fifth temperature signal, and adjusts the roller way speed of the roller way in the induction furnace 8 based on the induction furnace inlet temperature and the induction furnace outlet temperature.
Optionally, confirm the induction furnace inlet temperature of continuous casting billet according to the fourth temperature signal, confirm the induction furnace outlet temperature of continuous casting billet according to the fifth temperature signal to adjust the roller table speed of roller way in the induction furnace according to induction furnace inlet temperature and induction furnace outlet temperature, include:
calculating the average value of the fourth temperature signal to obtain the inlet temperature of the induction furnace of the continuous casting billet;
calculating the average value of the fifth temperature signal to obtain the outlet temperature of the induction furnace of the continuous casting billet;
and determining the current value of the roller way speed of the roller way in the induction furnace 8 based on the inlet temperature of the induction furnace and the outlet temperature of the induction furnace, and adjusting the current value of the roller way speed according to the inlet temperature of the induction furnace of the next continuous casting billet.
In the embodiment of the present invention, the fourth thermal detection device 14 and the fifth thermal detection device 15 may be pyrometers, and are configured to acquire temperature signals of the continuous casting slab at a preset frequency, where the acquisition mode may be: when one end of the continuous casting billet reaches the inlet or the outlet of the induction furnace 8, namely the fourth thermal detection device 14 or the fifth thermal detection device 15 collects the first temperature signal, one temperature signal is collected every second, the temperature signals are continuously collected for 10, and the average value is calculated, so that the inlet temperature and the outlet temperature of the induction furnace can be obtained. According to induction furnace entry temperature and induction furnace exit temperature can the accurate control induction furnace 8 the concurrent heating effect, the roller table speed of roll table in induction furnace 8 is adjusted through the induction furnace entry temperature of gathering next continuous casting billet, can guarantee that the temperature after different continuous casting billets go out induction furnace 8 is even. In addition, in the embodiment of the invention, the voltage of the induction furnace 8 can be adjusted, so that the control precision is further improved.
For example, when a 20-spiral product is rolled at the ambient temperature of 35 ℃, the drawing speed is set to be 2.65 m/min, the steel is drawn by 6 continuous casting, the cutting temperature of each continuous casting stream is 1025-1055 ℃, the temperature of the continuous casting billet when the continuous casting billet is sent out from the billet discharging roller way 4 is 975-1005 ℃, the temperature when the continuous casting billet reaches the induction furnace 8 is 945-970 ℃, the voltage of the induction furnace 8 is set to be 1200V, the roller way speed of the roller way in the induction furnace 8 is automatically adjusted according to the temperature of the continuous casting billet, the speed value is 11 m/min-13 m/min, and the temperature of the continuous casting billet after the continuous casting billet is sent out of the induction furnace 8 is 1005-1035 ℃.
Optionally, a sixth thermal detection device 16 is arranged on the inner roller way of the induction furnace 8, and the sixth thermal detection device 16 is used for collecting a sixth temperature signal of the continuous casting billet and sending the sixth temperature signal to the control module 101;
the control module 101 monitors the sixth temperature signal, and when the control module 101 continuously receives the sixth temperature signal and exceeds a first preset time threshold, an abnormal alarm is given;
or, when the control module 101 does not receive that the sixth temperature signal exceeds the second preset time threshold, performing an abnormal alarm.
In the embodiment of the present invention, a plurality of sixth thermal detecting devices 16 may be disposed on the roller table in the induction furnace 8, for example, the sixth thermal detecting device 16 of the present invention includes a sixth thermal detecting device 161, a sixth thermal detecting device 162, a sixth thermal detecting device 163, a sixth thermal detecting device 164, and a sixth thermal detecting device 165. When rolling 20 spiral specification products at the ambient temperature of 35 ℃, after the continuous casting billet enters the induction furnace 8, the sixth thermal detection device 161 in the induction furnace 8 detects a sixth temperature signal, after 80S, the sixth thermal detection device 165 in the induction furnace 8 does not detect a thermal detection signal, and the control module 101 gives an abnormal alarm and controls the induction furnace 8 to automatically power off. Checking, the continuous casting billet is blocked at the roller way of the induction furnace, and the control module 101 timely alarms and controls the induction furnace 8 to automatically cut off the power supply, so that the continuous casting billet is prevented from being burnt.
It should be noted that, in the embodiment of the present invention, the alarm of the thermal detection device is not limited to the induction furnace 8, and may also be set on other roller ways, for example, the first thermal detection device 11, the second thermal detection device 12, the third thermal detection device 13, the fourth thermal detection device 14, and the fifth thermal detection device 15 of the present invention may also implement the function of an abnormality alarm. For example: after the continuous casting billet enters the fast roller way 5, the third thermal detection device 133 in the fast roller way 5 continuously detects a certain signal for more than a certain time, which indicates that the continuous casting billet is blocked at the position, and the control module 101 gives an abnormal alarm and controls the voltage of the induction furnace 8 to automatically drop to 300V for waiting.
Optionally, an infrared camera 17 is arranged on the ejection roller table 4, and the infrared camera 17 is used for acquiring image information of each continuous casting billet on the ejection roller table 4 and sending the image information to the control module 101;
the control module 101 determines the residence time of each continuous casting billet on the ejection roller table 4 according to the image information, and gives an overtime alarm to the continuous casting billet of which the residence time is greater than a third preset time threshold.
Optionally, the conveying roller way 3 and the quick roller way 5 are both provided with heat preservation devices, and the heat preservation devices are used for reducing heat loss of the continuous casting billets in the conveying process.
In the embodiment of the invention, the heat preservation device can also be arranged on the ejection roller way 4, the cantilever roller way 6, the first front roller way 7 and the second front roller way 9 so as to reduce the heat loss of the continuous casting billet in the conveying process.
According to the invention, the conveying roller way, the knockout roller way, the quick roller way, the cantilever roller way, the first machine front roller way, the induction furnace and the second machine front roller way are arranged between the cutting machine and the rolling machine, so that the direct conveying channel of the continuous casting billet is established, the cut continuous casting billet can be sorted and supplemented with heat, and can be quickly conveyed to the rolling machine, the direct rolling of the continuous casting billet is realized, and the temperature loss of the continuous casting billet is reduced.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A slab rolling system, comprising:
the control module and the continuous casting billet rolling equipment;
the continuous casting slab rolling equipment comprises: the continuous casting machine comprises a casting machine, a cutting machine, a conveying roller way, a billet discharging roller way, a quick roller way, a cantilever roller way, a first machine front roller way, an induction furnace, a second machine front roller way and a rolling mill which are sequentially arranged according to the advancing direction of a continuous casting billet;
the control module is used for carrying out logic control on continuous casting billet rolling equipment; the casting machine is used for producing continuous casting billets; the cutting machine is used for cutting the continuous casting billet; the conveying roller way is used for conveying the cut continuous casting billets to a knockout roller way; the ejection roller way is used for sorting the continuous casting billets; the quick roller way is used for conveying the continuous casting billet from the knockout roller way to the cantilever roller way at a high speed; the cantilever roller way is used for reducing the speed of the continuous casting billet; the first front roller way is used for realizing the speed connection between the cantilever roller way and the roller way in the induction furnace; the induction furnace is used for supplementing heat to the continuous casting billet; the second front roller way is used for realizing the speed connection between the roller way in the induction furnace and the rolling mill; the rolling mill is used for rolling continuous casting billets.
2. The continuous casting billet rolling system according to claim 1, wherein a first thermal detection device is arranged at an outlet of the cutting machine and is used for acquiring a first temperature signal of each continuous casting billet and sending the first temperature signal to the control module; the second thermal detection device is arranged on the conveying roller way and used for collecting second temperature signals of the continuous casting billets and sending the second temperature signals to the control module;
and the control module determines the roller way speed of the conveying roller way according to the second temperature signal, calculates the predicted temperature of the continuous casting billet when the continuous casting billet reaches the ejection roller way based on the first temperature signal, the roller way speed and a preset continuous casting billet temperature drop model, and determines the sequence of the continuous casting billet entering the conveying roller way according to the predicted temperature.
3. The continuous casting billet rolling system according to claim 1, wherein a third thermal detection device is arranged at a preset position of the rapid roller way, and the third thermal detection device is used for collecting a third temperature signal of each continuous casting billet and sending the third temperature signal to the control module;
and the control module controls the interval of the continuous casting billet entering the rapid roller way according to the third temperature signal.
4. The continuous casting billet rolling system according to claim 1, wherein a fourth thermal detection device is arranged at the inlet of the induction furnace, and is used for collecting a fourth temperature signal of the continuous casting billet at a preset frequency and sending the fourth temperature signal to the control module when one end of the continuous casting billet reaches the inlet of the induction furnace;
a fifth thermal detection device is arranged at the outlet of the induction furnace and is used for collecting a fifth temperature signal of the continuous casting billet at a preset frequency and sending the fifth temperature signal to the control module when one end of the continuous casting billet reaches the outlet of the induction furnace;
and the control module determines the inlet temperature of the induction furnace of the continuous casting billet according to the fourth temperature signal, determines the outlet temperature of the induction furnace of the continuous casting billet according to the fifth temperature signal, and adjusts the roller way speed of the roller way in the induction furnace based on the inlet temperature of the induction furnace and the outlet temperature of the induction furnace.
5. The continuous casting billet rolling system of claim 4, wherein the determining of the induction furnace inlet temperature of the continuous casting billet based on the fourth temperature signal, the determining of the induction furnace outlet temperature of the continuous casting billet based on the fifth temperature signal, and the adjusting of the roller table speed of the roller table in the induction furnace based on the induction furnace inlet temperature and the induction furnace outlet temperature comprise:
calculating the average value of the fourth temperature signal to obtain the inlet temperature of the induction furnace of the continuous casting billet;
calculating the average value of the fifth temperature signal to obtain the outlet temperature of the induction furnace of the continuous casting billet;
and determining the current value of the roller way speed of the roller way in the induction furnace based on the inlet temperature of the induction furnace and the outlet temperature of the induction furnace, and adjusting the current value of the roller way speed according to the inlet temperature of the induction furnace of the next continuous casting billet.
6. The continuous casting slab rolling system according to claim 1, wherein the rollgang comprises a first rollgang, a second rollgang and a third rollgang arranged in this order in the direction of advance of the continuous casting slab;
the first conveying roller way and the third conveying roller way are of a single-flow centralized transmission structure, and the second conveying roller way is of a multi-flow shared long roller transmission structure.
7. The continuous casting slab rolling system according to claim 1, wherein the fast roller tables include a first fast roller table, a second fast roller table, a third fast roller table and a fourth fast roller table which are sequentially arranged in a continuous casting slab advancing direction;
the first rapid roller way is of a long roller transmission structure shared by multiple streams, the roller length is gradually shortened, and the roller length at the tail end of the first rapid roller way is equal to that of the second rapid roller way;
and the second rapid roller way, the third rapid roller way and the fourth rapid roller way are of a single-flow centralized transmission structure.
8. The continuous casting billet rolling system according to claim 1, wherein a sixth thermal detection device is arranged on the roller way in the induction furnace, and is used for collecting a sixth temperature signal of the continuous casting billet and sending the sixth temperature signal to the control module;
the control module monitors the sixth temperature signal, and when the control module continuously receives the sixth temperature signal and exceeds a first preset time threshold, an abnormal alarm is given;
or when the control module does not receive that the sixth temperature signal exceeds a second preset time threshold, performing exception alarm.
9. The continuous casting billet rolling system according to claim 1, wherein an infrared camera is arranged on the knockout roller way and used for collecting image information of each continuous casting billet on the knockout roller way and sending the image information to the control module;
and the control module determines the residence time of each continuous casting billet on the ejection roller way according to the image information and gives an overtime alarm to the continuous casting billet of which the residence time is greater than a third preset time threshold.
10. The continuous casting billet rolling system according to claim 1, wherein the conveying roller way and the rapid roller way are provided with heat preservation devices, and the heat preservation devices are used for reducing heat loss of the continuous casting billet in the conveying process.
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