Cast-rolling interface matching system and direct rolling control method

Abstract

The invention relates to a cast rolling interface matching system and a direct rolling control method, and belongs to the technical field of hot rolling long material production equipment and methods. According to the technical scheme, the rear end of a collecting roller way is connected with main rotary table equipment through a steel conveying roller way (3), and the main rotary table equipment (4), first rotary table equipment (9) and second rotary table equipment (13) are arranged on the steel loading side of a heating furnace; the main turntable equipment (4) is respectively butted with the first straight rolling channel (6) and the second straight rolling channel (7) along the rolling line direction, and is respectively connected with the first turntable equipment (9) and the second turntable equipment (13) through the first hot delivery roller way (8) and the second hot delivery roller way (12). The method has the beneficial effects that the production requirements of multiple modes of cast-rolling interface composite straight rolling, hot conveying and cold charging are met, meanwhile, efficient straight rolling of the coiled screws can be achieved, the straight rolling rate of the coiled screws supported by a straight rolling system reaches 90% or above, and the production cost value is obviously optimized.

Description

Technical Field

[0001] This invention relates to a casting-rolling interface matching system and a direct rolling control method, belonging to the technical field of hot-rolled long product production equipment and methods. Background Technology

[0002] In the casting-rolling interface of hot-rolled long product production (the casting-rolling interface is the connection between continuous casting and hot rolling), the billet silo is an important buffer link connecting the two processes of steelmaking and hot rolling. In the traditional production mode, after the billet is cast, it is cooled in the billet silo after it is taken off the production line. The waste heat of casting is not effectively utilized or recovered, resulting in a lot of energy waste.

[0003] Some advanced enterprises have installed roller conveyor systems to transport hot-cast billets into the heating furnace, saving heating costs. With the development of rolling mill equipment and high-speed continuous casting technology, direct rolling technology, which utilizes the residual heat from casting billets to directly roll finished products, has been applied in most steel enterprises. Hot-charging and direct rolling technologies for billets reduce heating costs and carbon emissions, while also helping to improve hot-rolled yield and enhance the competitiveness of metallurgical enterprises.

[0004] Hot charging and hot delivery technology is a relatively flexible connection technology, using the heating furnace as a buffer between the rolling line and steelmaking continuous casting production, resulting in a better matching degree. Direct rolling, on the other hand, involves a rigid matching connection between steelmaking continuous casting and the rolling line. Its matching effect is influenced not only by steel rolling production efficiency but also by structural factors affecting production costs. For example, a high direct rolling ratio can lead to prolonged furnace shutdowns, saving heating costs. The direct rolling ratio (characterizing the casting-rolling matching degree, the formula is: the percentage of billet directly rolled out to the total casting) is significantly affected by the production efficiency of steelmaking, casting, and rolling. Long product enterprises often use 100-ton converters with matching steelmaking and continuous casting production cycles to match six- or seven-strand continuous casting machines, with a production efficiency generally around 240 tons / hour. In steel rolling production lines, the production cycle of straight bar and threaded bar is similar to that of steelmaking, allowing for efficient matching between one machine and one line. The application of high-efficiency direct rolling technology for bar products is also relatively mature in the technical field. The production efficiency of high-strength wire rod coils is mostly 110~140 tons / hour, while the production efficiency of cast billets is twice that of coiled wire rods. The direct rolling rate of coiled wire rods is also generally low in the technical field.

[0005] Therefore, how to improve the direct rolling rate of coiled rebar and design a casting-rolling interface matching system that integrates composite direct rolling, hot charging, and cold charging are urgent technical problems to be solved. Summary of the Invention

[0006] The purpose of this invention is to provide a casting-rolling interface matching system and a direct rolling control method, which addresses the production needs of multiple modes such as composite direct rolling, hot delivery, and cold charging of the casting-rolling interface. At the same time, it can achieve efficient direct rolling of coiled rebar, producing only a small number of billets per casting cycle. The heating furnace is capable of long-term shutdown production conditions, and the direct rolling system supports a direct rolling rate of over 90% for coiled rebar, significantly optimizing production cost and effectively solving the aforementioned problems existing in the background technology.

[0007] The technical solution of this invention is: a casting-rolling interface matching system, comprising a heat insulation cover, a collecting roller conveyor, a conveying roller conveyor, a main turntable device, a steel separating device, a first straight rolling channel, a second straight rolling channel, a first hot conveying roller conveyor, a first turntable device, a first steel loading platform, a first heating furnace, a second hot conveying roller conveyor, a second turntable device, a second steel loading platform, and a second heating furnace. The collecting roller conveyor is equipped with a first baffle and a second baffle. The rear end of the collecting roller conveyor is connected to the input end of the main turntable device via the conveying roller conveyor. The main turntable device has the same structure as the first and second turntable devices. The main turntable device, the first turntable device, and the second turntable device are arranged on the steel loading side of the heating furnace. The main turntable device runs along the rolling mill... The rolling direction is connected to the first and second straight rolling channels respectively through the steel splitting device. The 90-degree output ends of the main turntable equipment in both directions are connected to the first and second turntable equipment respectively through the first and second hot conveying roller conveyors. The rolling direction input and output ends of the first turntable equipment are connected to the first steel loading platform and the first heating furnace respectively. The rolling direction input and output ends of the second turntable equipment are connected to the second steel loading platform and the second heating furnace respectively. The steel turning machine is set between the first baffle and the second baffle. Insulation covers are provided between the first baffle and the straightening machine, the collecting roller conveyor, the steel conveying roller conveyor, the first straight rolling channel, the second straight rolling channel, the first hot conveying roller conveyor, and the second hot conveying roller conveyor.

[0008] The insulation material of the insulation cover is an insulating castable, and the billet temperature drops to less than 1.1℃ / m inside the insulation cover.

[0009] The steel conveyor is an inclined roller conveyor. The speed of the inclined roller conveyor is controlled in multiple segments. The initial speed is low, the middle speed is high, and the final speed is low. The incline angle is no greater than 4.5°.

[0010] The steel conveyor rollers consist of six sections, with the speeds of rollers #1 to #6 being 3m / s, 5m / s, 6m / s, 6m / s, 5m / s, and 2.5m / s, respectively.

[0011] The first steel loading platform and the second steel loading platform are not on the same machine span.

[0012] The steel-separating device includes a steel-separating arm, a steel-separating arm connecting frame, a steel-separating arm drive cylinder, a cylinder electromagnetic control valve, a steel-separating arm position switch, a sensor, and a steel-separating zone roller conveyor. The straight-rolled billet is transported to the first straight-rolling channel and the second straight-rolling channel through the steel-separating zone roller conveyor.

[0013] The first and second straight rolling channels are respectively connected to the first and second rolling lines. The roller conveyor groups of the first and second straight rolling channels are arc-shaped roller conveyors, and the transport rollers are arranged concentrically at different angles.

[0014] A method for controlling the temperature of billet supply in direct rolling, using the casting-rolling interface matching system described in claims 1-6, includes the following steps: (1) The first baffle and the second baffle are respectively installed in the front and rear of the steel turning machine in the continuous casting area at the front end of the collecting roller conveyor, and the equipment gap in front of the first baffle is equipped with a heat insulation cover; (2) Obtain the billet temperature after the first baffle is released. The billet runs to the first baffle and waits in the heat insulation cover for a certain period of time before being released. The high temperature gauges of each flow measure the billet temperature and transmit the signal and temperature control program. (3) Determine whether the temperature of the billet released by the first baffle meets the temperature standard for direct rolling release; (4) If the billet temperature is lower than the direct rolling temperature requirement, the billet will be removed from the production line by the billet turning machine and direct rolling is not allowed. The billet will be put into the billet warehouse. (5) If the billet temperature meets the direct rolling temperature requirements, the billet turning machine will temporarily stop billet operation and the billet will wait for the direct rolling billet supply signal in front of the second baffle. (6) Determine whether the billet receives the direct rolling program's steel demand signal within the specified waiting time at the second baffle; (7) If no steel demand signal is received within the allowed waiting time, the billet is processed off the production line by the billet turning machine; if the billet receives a steel demand signal within the allowed waiting time, the second baffle is released and the billet is used as a direct rolling billet for rolling; if there is not only one first-run billet that meets the release requirements at the second baffle, the second baffle implements the release priority rule, that is, the billet with the shortest waiting time at the second baffle is released for direct rolling first.

[0015] The temperature standard for direct rolling release at the first baffle is set to be higher than 950℃. The waiting time for the first baffle and the waiting time for the second baffle are determined by the drawing speed, the speed of each flow roller, and the length of each section of the roller. If the cross-section of the billet is 165 square, the waiting time for the first baffle is 70s and the waiting time for the second baffle is 60s. If the cross-section of the cast billet is 150 square, the waiting time for the first baffle is 50s and the waiting time for the second baffle is 70s.

[0016] When the rolling mill reports a slow direct rolling billet feeding rhythm and billets are flipped onto the cooling bed, the waiting time of the second baffle should be adjusted first, with an adjustment range of 50-70 seconds. If adjusting the second baffle time to 70 seconds still has no effect, the direct rolling billet length should be shortened by 1-2 meters, and the direct rolling billet feeding rhythm should be adjusted.

[0017] A method for matching the production efficiency of continuous casting and rolling mill includes the following steps: controlling the casting speed by blocking the flow in continuous casting, matching the total casting speed of each flow in continuous casting with the throughput of the first and second rolling mill production lines, controlling the casting efficiency of continuous casting to be slightly lower than the production efficiency of rolling mill, and adopting high casting speed and low flow rate production control within the maximum range allowed by the continuous casting process and equipment functional accuracy.

[0018] The required drawing speed for double-high-speed direct rolling is 3.4m / min-3.8m / min, with 5-strand production organized to ensure a total drawing speed of not less than 18m / min; for single-strand direct rolling, continuous casting still organizes 5-strand production, but the first strand goes off the line into the billet warehouse, and the fourth strand is supplied for rolling, with an intermediate superheat of 1520~1530℃.

[0019] A direct rolling control method includes the following steps: (1) Obtain the direct rolling mode, and select the direct rolling mode as double-line direct rolling or single-line direct rolling; (2) Obtain the direct rolling scheme. If it is a dual-line direct rolling mode, the first direct rolling billet is first fed to the first or second direct rolling channel; if it is a single-line direct rolling mode, it is fed to the first or second direct rolling channel. (3) Determine the status of the direct rolling equipment, the first baffle, the second baffle and the main turntable are clamped, and obtain the status of the steel separating device; (4) If the equipment is in an abnormal state, direct rolling is not allowed; if the equipment is in a normal state, the direct rolling scheme shall be implemented. (5) If it is a double-line direct rolling, the steel-separating arm is guided to the direct rolling scheme supply channel by the cylinder electromagnetic control valve. After the steel-separating arm in the steel-separating device is in place, the proximity switch sends a confirmation signal to the direct rolling program. The direct rolling program sends a steel demand signal to the continuous casting. After receiving the signal, the continuous casting commands the second baffle that meets the temperature control requirements to release steel according to the steel release rules, so that the direct rolling billet enters the direct rolling channel. The direct rolling billet passes through the main turntable equipment and the steel-separating area roller table and enters the rolling line for processing and forming. (6) If it is a single-line direct rolling, the direct rolling scheme is set by controlling the steel-separating arm guide through the cylinder electromagnetic control valve. After the steel-separating arm in the steel-separating device is in place, the proximity switch sends a confirmation signal to the direct rolling program. The direct rolling program sends a steel demand signal to the continuous casting. After receiving the signal, the continuous casting commands the second baffle that meets the requirements to release steel according to the steel release rules, so that the direct-rolled billet enters the direct rolling channel. The direct-rolled billet passes through the main turntable equipment and the steel-separating area roller table and enters the rolling line for processing and forming. (7) After the hot metal detector of the steel conveyor roller table detects the steel billet, it sends a steel demand signal to the continuous casting after a delay, thereby realizing automatic steel demand in the direct rolling process.

[0020] In step (7), the hot metal detector of the steel conveying roller is arranged at the exit of roller #3 of the steel conveying roller, and the steel demand delay time during single-line direct rolling is 3600ms.

[0021] A method for safety interlock control of direct rolling process includes the following steps: (1) The first acquisition module acquires whether the first and second rolling production lines have issued direct rolling fault signals. If the rolling production line has an abnormality and direct rolling needs to be stopped, a signal is sent to the first judgment module; (2) After the first judgment module receives a fault signal from a certain rolling production line and there is no hot steel signal at the hot metal detector of the steel sorting device of the rolling production line, the steel sorting arm is forcibly guided to the fault-free rolling line channel, and at the same time, the No. 5 and No. 6 rollers of the steel conveying rollers decelerate to avoid the lower support direct rolling billet from entering the wrong channel or other accidents; (3) If the first judgment module does not receive a fault signal from the rolling production line, the second acquisition module is executed. (3) The module obtains the steel arm positioning switch signal of the steel-separating device; (4) The second judgment module judges whether the steel arm of the steel-separating device is in position; (5) If the steel arm positioning switch signal is normal after the cylinder solenoid control valve is activated, the control module allows the direct rolling program to issue a steel demand signal; Specifically, at the start of direct rolling, a steel demand signal is allowed to be issued; during the direct rolling process, after a hot metal detector on the climbing roller table detects the direct rolling billet, a steel demand signal is allowed to be issued; if the steel arm positioning switch signal is abnormal after the cylinder solenoid control valve is activated, the steel demand signal cannot be issued, and direct rolling is not allowed. At the same time, the No. 5 and No. 6 rollers of the direct rolling climbing roller table decelerate to avoid the lower direct rolling billet from entering the wrong channel or other accidents. The beneficial effects of this invention are: it provides production requirements for multiple modes such as composite direct rolling at the casting-rolling interface, hot delivery, and cold charging; at the same time, it can achieve efficient direct rolling of coiled rebar, with only a small number of unfinished billets produced in each casting cycle; the heating furnace has the production conditions for long-term furnace shutdown; the direct rolling system supports a direct rolling rate of over 90% for coiled rebar, significantly optimizing production cost value. Attached Figure Description

[0022] Figure 1 This is a flowchart of the direct rolling billet temperature control method of the present invention; Figure 2 This is a flowchart of the dual-line direct rolling process in the direct rolling control method of the present invention; Figure 3 This is a flowchart of the single-line direct rolling process in the direct rolling control method of the present invention; Figure 4 This is a flowchart of the direct rolling process safety interlock control method of the present invention; Figure 5 This is a schematic diagram of the overall structure of the casting-rolling interface matching system of the present invention; Figure 6 This is a front view of the arrangement of the converging roller conveyor, equipment, and insulation cover in the casting-rolling interface matching system of the present invention. Figure 7 This is a top view of the arrangement of the converging roller conveyor, equipment, and insulation cover in the casting-rolling interface matching system of the present invention. Figure 8 This is a side view of the arrangement of the converging roller conveyor, equipment, and insulation cover in the casting-rolling interface matching system of the present invention. Figure 9 This is a front view of the arrangement of the steel conveying rollers and heat insulation cover in the casting-rolling interface matching system of the present invention. Figure 10 This is a top view of the arrangement of the steel conveying rollers and heat insulation cover in the casting-rolling interface matching system of the present invention; Figure 11 This is a side view of the arrangement of the steel conveying rollers and heat insulation cover in the casting-rolling interface matching system of the present invention. Figure 12 This is a top view of the main turntable equipment in the casting-rolling interface matching system of the present invention; Figure 13 This is a side view of the main turntable device in the casting-rolling interface matching system of the present invention; Figure 14 This is a schematic diagram of the steel separating device in the casting-rolling interface matching system of the present invention; Figure 15 This is a structural block diagram of the present invention; In the diagram: 1. Insulation cover; 2. Gathering roller conveyor; 3. Steel conveying roller conveyor; 4. Main turntable equipment; 5. Steel separating device; 6. First straight rolling channel; 7. Second straight rolling channel; 8. First hot conveying roller conveyor; 9. First steel loading platform; 10. First heating furnace; 11. Second hot conveying roller conveyor; 12. Second turntable equipment; 13. Second steel loading platform; 14. Second heating furnace. Detailed Implementation

[0023] To make the purpose, technical solutions, and advantages of the invention's embodiments clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only a small part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0024] A casting-rolling interface matching system includes an insulation cover 1, a collecting roller conveyor 2, a conveying roller conveyor 3, a main turntable device 4, a steel separating device 5, a first straight rolling channel 6, a second straight rolling channel 7, a first hot delivery roller conveyor 8, a first turntable device 9, a first loading platform 10, a first heating furnace 11, a second hot delivery roller conveyor 12, a second turntable device 13, a second loading platform 14, and a second heating furnace 15. The collecting roller conveyor 2 is equipped with a first baffle and a second baffle. The rear end of the collecting roller conveyor is connected to the input end of the main turntable device 4 through the conveying roller conveyor 3. The main turntable device 4 has the same structure as the first turntable device 9 and the second turntable device 13. The main turntable device 4, the first turntable device 9, and the second turntable device 13 are arranged on the loading side of the heating furnace. The main turntable device 4 is located along the rolling line direction. The steel-separating device 5 is connected to the first straight rolling channel 6 and the second straight rolling channel 7 respectively. The 90-degree output ends of the main turntable equipment 1 in two directions are connected to the first turntable equipment 9 and the second turntable equipment 13 respectively through the first hot conveying roller table 8 and the second hot conveying roller table 12. The rolling direction input end and output end of the first turntable equipment 9 are connected to the first steel loading platform 10 and the first heating furnace 11 respectively. The rolling direction input end and output end of the second turntable equipment 13 are connected to the second steel loading platform 14 and the second heating furnace 15 respectively. The steel turning machine is set between the first baffle and the second baffle. The first baffle and the straightening machine, the collecting roller table 2, the steel conveying roller table 3, the first straight rolling channel 6, the second straight rolling channel 7, the first hot conveying roller table 8 and the second hot conveying roller table 12 are all equipped with heat preservation covers 1.

[0025] The insulation material of the insulation cover is an insulating castable, and the billet temperature drops to less than 1.1℃ / m inside the insulation cover.

[0026] The steel conveying roller conveyor 3 is an inclined roller conveyor. The roller speed of the inclined roller conveyor is controlled in multiple segments. The initial speed is low, the middle speed is high, and the final speed is low. The incline angle is no greater than 4.5°.

[0027] The steel conveyor roller 3 comprises six sections, with the speeds of roller 1 to roller 6 being 3m / s, 5m / s, 6m / s, 6m / s, 5m / s and 2.5m / s, respectively.

[0028] The first steel loading platform 10 and the second steel loading platform 14 are not on the same loading rack.

[0029] The steel-separating device 5 includes a steel-separating arm, a steel-separating arm connecting frame, a steel-separating arm driving cylinder, a cylinder electromagnetic control valve, a steel-separating arm position switch, a sensor, and a steel-separating zone roller conveyor. The straight-rolled billet is transported to the first straight-rolling channel 6 and the second straight-rolling channel 7 through the steel-separating zone roller conveyor.

[0030] The first straight rolling channel 6 and the second straight rolling channel 7 are respectively connected to the first rolling line and the second rolling line. The roller conveyor group of the first straight rolling channel 6 and the second straight rolling channel 7 is an arc-shaped roller conveyor, and the transport rollers are arranged concentrically at different angles.

[0031] A method for controlling the temperature of billet supply in direct rolling, using the casting-rolling interface matching system described in claims 1-6, includes the following steps: (1) The first baffle and the second baffle are respectively installed in the front and rear of the steel turning machine in the continuous casting area at the front end of the collecting roller conveyor, and the equipment gap in front of the first baffle is equipped with a heat insulation cover; (2) Obtain the billet temperature after the first baffle is released. The billet runs to the first baffle and waits in the heat insulation cover for a certain period of time before being released. The high temperature gauges of each flow measure the billet temperature and transmit the signal and temperature control program. (3) Determine whether the temperature of the billet released by the first baffle meets the temperature standard for direct rolling release; (4) If the billet temperature is lower than the direct rolling temperature requirement, the billet will be removed from the production line by the billet turning machine and direct rolling is not allowed. The billet will be put into the billet warehouse. (5) If the billet temperature meets the direct rolling temperature requirements, the billet turning machine will temporarily stop billet operation and the billet will wait for the direct rolling billet supply signal in front of the second baffle. (6) Determine whether the billet receives the direct rolling program's steel demand signal within the specified waiting time at the second baffle; (7) If no steel demand signal is received within the allowed waiting time, the billet is processed off the production line by the billet turning machine; if the billet receives a steel demand signal within the allowed waiting time, the second baffle is released and the billet is used as a direct rolling billet for rolling; if there is not only one first-run billet that meets the release requirements at the second baffle, the second baffle implements the release priority rule, that is, the billet with the shortest waiting time at the second baffle is released for direct rolling first.

[0032] The temperature standard for direct rolling release at the first baffle is set to be higher than 950℃. The waiting time for the first baffle and the waiting time for the second baffle are determined by the drawing speed, the speed of each flow roller, and the length of each section of the roller. If the cross-section of the billet is 165 square, the waiting time for the first baffle is 70s and the waiting time for the second baffle is 60s. If the cross-section of the cast billet is 150 square, the waiting time for the first baffle is 50s and the waiting time for the second baffle is 70s.

[0033] When the rolling mill reports a slow direct rolling billet feeding rhythm and billets are flipped onto the cooling bed, the waiting time of the second baffle should be adjusted first, with an adjustment range of 50-70 seconds. If adjusting the second baffle time to 70 seconds still has no effect, the direct rolling billet length should be shortened by 1-2 meters, and the direct rolling billet feeding rhythm should be adjusted.

[0034] A method for matching the production efficiency of continuous casting and rolling mill includes the following steps: controlling the casting speed by blocking the flow in continuous casting, matching the total casting speed of each flow in continuous casting with the throughput of the first and second rolling mill production lines, controlling the casting efficiency of continuous casting to be slightly lower than the production efficiency of rolling mill, and adopting high casting speed and low flow rate production control within the maximum range allowed by the continuous casting process and equipment functional accuracy.

[0035] The required drawing speed for double-high-speed direct rolling is 3.4m / min-3.8m / min, with 5-strand production organized to ensure a total drawing speed of not less than 18m / min; for single-strand direct rolling, continuous casting still organizes 5-strand production, but the first strand goes off the line into the billet warehouse, and the fourth strand is supplied for rolling, with an intermediate superheat of 1520~1530℃.

[0036] A direct rolling control method includes the following steps: (1) Obtain the direct rolling mode, and select the direct rolling mode as double-line direct rolling or single-line direct rolling; (2) Obtain the direct rolling scheme. If it is a dual-line direct rolling mode, the first direct rolling billet is first fed to the first or second direct rolling channel; if it is a single-line direct rolling mode, it is fed to the first or second direct rolling channel. (3) Determine the status of the direct rolling equipment, the first baffle, the second baffle and the main turntable are clamped, and obtain the status of the steel separating device; (4) If the equipment is in an abnormal state, direct rolling is not allowed; if the equipment is in a normal state, the direct rolling scheme shall be implemented. (5) If it is a double-line direct rolling, the steel-separating arm is guided to the direct rolling scheme supply channel by the cylinder electromagnetic control valve. After the steel-separating arm in the steel-separating device is in place, the proximity switch sends a confirmation signal to the direct rolling program. The direct rolling program sends a steel demand signal to the continuous casting. After receiving the signal, the continuous casting commands the second baffle that meets the temperature control requirements to release steel according to the steel release rules, so that the direct rolling billet enters the direct rolling channel. The direct rolling billet passes through the main turntable equipment and the steel-separating area roller table and enters the rolling line for processing and forming. (6) If it is a single-line direct rolling, the direct rolling scheme is set by controlling the steel-separating arm guide through the cylinder electromagnetic control valve. After the steel-separating arm in the steel-separating device is in place, the proximity switch sends a confirmation signal to the direct rolling program. The direct rolling program sends a steel demand signal to the continuous casting. After receiving the signal, the continuous casting commands the second baffle that meets the requirements to release steel according to the steel release rules, so that the direct-rolled billet enters the direct rolling channel. The direct-rolled billet passes through the main turntable equipment and the steel-separating area roller table and enters the rolling line for processing and forming. (7) After the hot metal detector of the steel conveyor roller table detects the steel billet, it sends a steel demand signal to the continuous casting after a delay, thereby realizing automatic steel demand in the direct rolling process.

[0037] In step (7), the hot metal detector of the steel conveying roller is arranged at the exit of roller #3 of the steel conveying roller, and the steel demand delay time during single-line direct rolling is 3600ms.

[0038] A method for safety interlock control of direct rolling process includes the following steps: (1) The first acquisition module acquires whether the first and second rolling production lines have issued direct rolling fault signals. If the rolling production line has an abnormality and direct rolling needs to be stopped, a signal is sent to the first judgment module; (2) After the first judgment module receives a fault signal from a certain rolling production line and there is no hot steel signal at the hot metal detector of the steel sorting device of the rolling production line, the steel sorting arm is forcibly guided to the fault-free rolling line channel, and at the same time, the No. 5 and No. 6 rollers of the steel conveying rollers decelerate to avoid the lower support direct rolling billet from entering the wrong channel or other accidents; (3) If the first judgment module does not receive a fault signal from the rolling production line, the second acquisition module is executed. (3) The module obtains the steel arm positioning switch signal of the steel-separating device; (4) The second judgment module judges whether the steel arm of the steel-separating device is in position; (5) If the steel arm positioning switch signal is normal after the cylinder solenoid control valve is activated, the control module allows the direct rolling program to issue a steel demand signal; Specifically, at the start of direct rolling, a steel demand signal is allowed to be issued; during the direct rolling process, after a hot metal detector on the climbing roller table detects the direct rolling billet, a steel demand signal is allowed to be issued; if the steel arm positioning switch signal is abnormal after the cylinder solenoid control valve is activated, the steel demand signal cannot be issued, and direct rolling is not allowed. At the same time, the No. 5 and No. 6 rollers of the direct rolling climbing roller table decelerate to avoid the lower direct rolling billet from entering the wrong channel or other accidents. An electronic device includes a processor and a memory coupled to the processor. The memory stores instructions that, when executed by the processor, cause the electronic device to perform the steps of any of the methods in the efficient direct rolling method.

[0039] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of any one of the efficient direct rolling methods.

[0040] This invention provides a method for matching the production efficiency of continuous casting and rolling mills. Preferably, the production efficiencies of continuous casting and rolling mills should be similar. In the technical field, continuous casting efficiency is often higher than rolling mill efficiency, and continuous casting can control the casting speed by blocking the flow. Specifically, the total casting speed of each flow in continuous casting should be matched with the throughput of the first and second rolling mill lines (throughput characterizes the efficiency of steel production in rolling mills, calculated as the product of the rolling mill line speed K1 and the product cross-section). Furthermore, to reduce cash flow costs by minimizing the number of billets produced, the continuous casting efficiency should be controlled to be slightly lower than the rolling mill production efficiency. Furthermore, within the maximum allowable range of continuous casting process and equipment functionality accuracy, a high casting speed and low flow rate production scheme is preferred.

[0041] In the metallurgical enterprise where this example is applied, steelmaking utilizes a 100-ton top-and-bottom blown converter with a direct-flow coiled rebar process. Continuous casting is done on a 7-strand continuous casting machine, capable of producing 150mm and 165mm square billets. The 165mm square billet can be drawn at a speed of 4.0m / min. The billets are cut to length using a flame cutter with a maximum cutting speed of 3.8m / min. The coiled rebar profile is supplied with 165mm square billets for rolling, with standard products being 8-twist and 10-twist. During cold billet rolling production, the final rolling speed for 8-twist is 85-90m / s, and for 10-twist, it is 55-60m / s.

[0042] Preferably, during double-line direct rolling, the drawing speed should be 3.4m / min-3.8m / min, with 5-strand production organized to ensure a total drawing speed of not less than 18m / min (theoretical steel throughput is: 18m / min ÷ 60s × 1000mm × 1652 = 8167500mm3 / s). The rolling mill uses constant-speed coil rolling, with an 8-strand final rolling speed of 85m / s and a 10-strand final rolling speed of 55m / s. Taking two rolling mills producing 8-strand and 10-strand coils respectively as an example, the material throughput is: (85m / s × 42 + 55m / s × 52) × Π = 8587900mm3 / s. During single-line direct rolling, to match the converter cycle, continuous casting still organizes 5-strand production, but the first strand goes off the line into the billet warehouse, and the fourth strand is supplied for rolling, with an intermediate superheat of 1520~1530℃.

[0043] like Figure 5 The casting-rolling interface matching system can meet the production needs of multiple modes, including direct rolling, hot delivery, and cold charging. It can achieve high-efficiency matching between coil rolling and billet production, specifically by connecting one continuous casting machine with two high-speed wire rod production lines. Specifically, it includes the following components: 2. Gathering roller conveyor after the billet continuous casting machine; 3. Steel conveying roller conveyor; 4. Main turntable equipment; 5. Steel separating device; 6. First direct rolling channel; 7. Second direct rolling channel; 8. First hot delivery roller conveyor; 12. Second hot delivery roller conveyor; 9. First turntable equipment; 13. Second turntable equipment; 10. First steel loading platform; 14. Second steel loading platform; 11. First heating furnace; 15. Second heating furnace; and auxiliary components on the roller conveyors, such as the insulation cover 1, related sensors, pyrometers, and the first and second baffles on the gathering roller conveyor.

[0044] like Figure 6 , Figure 7 and Figure 8 The collecting roller conveyor is equipped with a first baffle and a second baffle. Specifically, a first baffle and a second baffle are installed on each casting stream, with a steel turning machine between the two baffles. A heat insulation cover is installed on the collecting roller conveyor for the entire billet conveying process. Specifically, heat insulation covers are installed after the straightening machine, after the auxiliary straightening machine, after the hydraulic shear (or fire cutter), and in front of each baffle. The heat insulation material of the heat insulation covers is heat-insulating castable refractory. The billet temperature is reduced to less than 1.1℃ / m inside the heat insulation cover.

[0045] like Figure 9 , Figure 10 and Figure 11 The converging roller conveyor connects to the steel transport roller conveyor at its rear end. The steel transport roller conveyor can be an inclined roller conveyor or a regular transport roller conveyor, depending on the rolling line elevation. This embodiment describes it as an inclined roller conveyor. Specifically, an insulation cover is laid on the inclined roller conveyor. The speed of the inclined roller conveyor is controlled in multiple stages: a low initial speed, a high speed in the middle stage, and a low speed at the end. Preferably, the speeds of rollers #1 to #6 are 3m / s, 5m / s, 6m / s, 6m / s, 5m / s, and 2.5m / s, respectively. Preferably, the incline angle should not exceed 4.5° to ensure the smooth transport of the straight-rolled billet to the rolling area.

[0046] like Figure 12 and Figure 13 The steel conveyor rollers connect to the main turntable, which receives the hot billets transported by the rollers and directs them to the rolling zone. The main turntable has the same structure as the first and second turntables, enabling a 90° billet rotation. The three turntables are located on the charging side of the heating furnace. The first and second turntables are connected to the main turntable via the first hot conveyor rollers 8 and 12, respectively. This invention achieves hot billet delivery to the first heating furnace via the main turntable, the first hot conveyor rollers, and the first turntable. Similarly, this invention achieves hot billet delivery to the second heating furnace via the main turntable, the second hot conveyor rollers, and the second turntable. The first and second loading platforms are connected to the first and second turntables via rollers, respectively. This invention achieves cold billet loading via the first and second loading platforms, their associated rollers, and the first and second turntables. Preferably, the first and second loading platforms are not on the same span to ensure loading efficiency.

[0047] like Figure 14 The main turntable conveyor transports the straight-rolled billets from the steel conveyor rollers to the sorting zone. The sorting device 5 is connected to the first straight rolling channel 6 and the second straight rolling channel 7, respectively. Specifically, the sorting zone guides the straight-rolled billets to either the first or second straight rolling channel, enabling dual-line straight rolling on a single machine. The sorting device includes a sorting arm, a sorting arm connecting frame, a sorting arm drive cylinder, a cylinder solenoid control valve, a sorting arm position switch, sensors, and the sorting zone rollers. The sorting zone rollers transport the straight-rolled billets to the first straight rolling channel 6 and the second straight rolling channel 7, respectively. The sorting device enables automatic delivery of the straight-rolled billets to different rolling lines.

[0048] The first straight rolling channel 6 and the second straight rolling channel 7 are respectively connected to the first rolling line and the second rolling line. The roller conveyor group of the first straight rolling channel 6 and the second straight rolling channel 7 is an arc-shaped roller conveyor, and the transport rollers are arranged concentrically at different angles to facilitate the turning of the straight rolling billet to the rolling line.

[0049] like Figure 15This embodiment can provide a dual-line direct rolling mode with efficient casting and rolling matching, as well as a single-line direct rolling mode under special circumstances, which can flexibly meet the production needs of metallurgical enterprises under multiple working conditions. This embodiment also provides a billet control module and a direct rolling process safety interlock module to support the direct rolling system, ensuring that direct rolling production is scientific, efficient, safe, and smooth.

[0050] like Figure 1 In the direct rolling billet temperature control method, the billet control module described in the embodiment is embedded in the post-continuous casting area and applied in direct rolling production to ensure the compliance of the direct rolling billet temperature and the compact direct rolling billet supply rhythm. The billet control module is configured along the billet transport direction as follows: a straightening machine, a heat insulation hood, an auxiliary straightening machine, a heat insulation hood, a hydraulic shear (or a fire cutter), a heat insulation hood, a first baffle (and a pyrometer), a billet turning machine, and a second baffle. The heat insulation material of the heat insulation hood is heat-insulating castable refractory, and the billet temperature decreases by less than 1.1℃ / m inside the heat insulation hood.

[0051] The method includes: Obtain the billet temperature after the first baffle is opened: The billet moves to the first baffle and waits inside the insulation hood for a certain period of time before being released. High-temperature gauges assigned to each flow measure the billet temperature and transmit signals to the temperature control program. Determine whether the temperature of the billet released from the first baffle is qualified. Specifically, the released billet should be above a certain temperature before it can be directly rolled.

[0052] If the billet temperature is lower than the direct rolling temperature requirement, the billet will be removed from the production line by the billet turning machine and will not be allowed to be directly rolled; instead, it will be placed in the billet warehouse.

[0053] If the billet temperature meets the requirements of the direct rolling temperature, the billet turning machine will temporarily stop billet operation, and the billet can wait for the direct rolling billet supply signal in front of the second baffle.

[0054] Determine whether the billet receives the direct rolling program's steel demand signal within the specified waiting time at the second baffle.

[0055] If no steel demand signal is received within the allowed waiting time, the billet is removed from the production line by the billet turning machine; if a steel demand signal is received within the allowed waiting time, the second baffle releases the billet, and the billet is supplied for direct rolling. If there are multiple billets at the second baffle that meet the release requirements, the second baffle implements the optimal release rule, that is, the billet with the shortest waiting time at the second baffle is released for direct rolling first.

[0056] Preferably, the temperature setting for the first baffle to meet the direct rolling release standard is above 950℃. The waiting time for the first baffle and the second baffle are determined by the drawing speed, the speed of each flow roller, and the length of each section of the roller. If the billet cross-section is 165 mm, preferably, the waiting time for the first baffle is 70 seconds, and the waiting time for the second baffle is 60 seconds; if the billet cross-section is 150 mm, preferably, the waiting time for the first baffle is 50 seconds, and the waiting time for the second baffle is 70 seconds.

[0057] Furthermore, when the rolling mill reports a slow direct rolling billet feeding rhythm and billets are being rolled onto the cooling bed, the waiting time of the second baffle should be adjusted first, within a range of 50-70 seconds. Even further, if adjusting the second baffle time to 70 seconds still has no effect, the direct rolling billet length should be shortened by 1-2 meters, and the direct rolling billet feeding rhythm adjusted.

[0058] like Figure 4 The safety interlock control system for direct rolling processes is applied in direct rolling production. The equipment involved includes the 5th and 6th roller conveyors and their speed control components, the steel sorting device, the direct rolling fault buttons for the first and second rolling lines, and the direct rolling program. Specifically: The first acquisition module is used to acquire whether the first and second rolling mill production lines have issued direct rolling fault signals. If there is an abnormality in the rolling mill production line and direct rolling needs to be stopped, a signal needs to be sent to the safety interlock device.

[0059] The first judgment module, if the safety interlock device receives a fault signal from a certain steel rolling production line, and there is no hot steel signal at the hot metal detector of the steel sorting device of the steel rolling production line, the steel sorting arm is forcibly guided to the fault-free rolling line channel, and at the same time the No. 5 and No. 6 roller conveyors of the direct rolling transport decelerate to prevent the lower direct rolling billet from entering the wrong channel or causing other accidents; If the safety interlock device does not receive a fault signal from the steel rolling production line, the second acquisition module will be executed.

[0060] The second acquisition module acquires the steel-splitting arm position switch signal of the steel-splitting device.

[0061] The second judgment module determines whether the steel-splitting arm of the steel-splitting device is in position.

[0062] The control module allows the direct rolling program to issue a steel request signal if the steel-splitting arm positioning switch signal is normal after the direct rolling program commands the steel-splitting device cylinder solenoid valve to operate. Specifically, a steel request signal is allowed at the start of direct rolling; during direct rolling, a steel request signal is allowed after a hot metal detector on the inclined roller conveyor detects the direct-rolled billet; if the steel-splitting arm positioning switch signal is abnormal after the direct rolling program commands the steel-splitting device cylinder solenoid valve to operate, the steel request signal cannot be issued, and direct rolling is not allowed. Simultaneously, roller conveyors #5 and #6 on the inclined track decelerate to prevent the next direct-rolled billet from entering the wrong channel or causing other accidents.

[0063] like Figure 2 The direct rolling control method is a single-machine dual-line direct rolling matching mode. The dual-line direct rolling control method is as follows: The module acquires the direct rolling scheme, specifically the first direct-rolled billet is first fed to the first channel or the second channel. The judgment module determines the status of the direct rolling equipment, specifically the status of the first baffle, the second baffle, the clamping of the main turntable equipment, the steel separating device, and other equipment. If the equipment is in an abnormal state, the control module will not allow direct rolling; if the equipment is in a normal state, the direct rolling scheme will be executed. Specifically, the cylinder electromagnetic control valve controls the steel-separating arm to guide the pre-set rolling channel. After the steel-separating arm of the steel-separating device is in place, the proximity switch sends a confirmation signal to the direct rolling program. The direct rolling program sends a steel demand signal to the continuous casting. After receiving the signal, the continuous casting commands the second baffle that meets the temperature control requirements to release steel according to the steel release rules, so that the direct-rolled billet enters the direct-rolling roller table. The direct-rolled billet passes through the climbing roller table, the main turntable equipment roller table, and the steel-separating roller table channel, and enters the rolling line for processing and shaping.

[0064] During this process, after the billet passes through a hot metal detector on the steel conveying roller table and is detected, a delayed signal is sent to the continuous casting station to request the next billet, realizing automatic steel request in the direct rolling process. After the hot metal detector at the entrance of the arc roller table in the steel distribution channel detects the billet, the direct rolling program sends a delayed action command to the steel distribution device, causing the steel distribution device channel to be guided to another channel, realizing dual-line direct rolling. At the same time, the secondary system uses the hot detection signals from the two steel distribution channels to determine the production line of the billet direct rolling, realizing the correspondence, calibration, and record traceability of steel-material production information.

[0065] Preferably, the thermal detection sensor of the steel conveyor roller is arranged at the exit of the No. 3 roller of the steel conveyor roller, and the steel demand delay time is 2000ms.

[0066] like Figure 3 This embodiment also provides a single-line direct rolling mode under the casting-rolling interface matching system to meet flexible production needs. The single-line direct rolling control method is as follows: Acquisition module. Acquire whether the direct rolling production line is the first or second direct rolling production line; Determine the status of the direct rolling equipment, specifically the status of the first baffle, the second baffle, the clamping of the main turntable equipment, the steel separating device, etc. Control module. If the equipment is in an abnormal state, direct rolling is not allowed; if the equipment is in a normal state, the direct rolling scheme is executed. Specifically: The direct rolling program commands the solenoid valve of the steel-separating device to forcibly control the steel-separating arm, guiding it to the channel set in the direct rolling scheme. After the steel-separating arm reaches its position, a proximity switch sends a confirmation signal to the direct rolling program. The direct rolling program then sends a steel demand signal to the continuous casting machine. Upon receiving the signal, the continuous casting machine commands the second baffle, which meets the requirements, to release steel according to the steel release rules. The direct-rolled billet enters the direct rolling roller table, the rotating turntable roller table channel, and the steel-separating roller table channel, and enters the rolling line for processing and shaping.

[0067] After a hot metal detector on the direct rolling ramp detects a steel billet, it sends a steel request signal to the continuous casting machine after a delay, thereby realizing automatic steel request during the direct rolling process. Preferably, the hot metal detector on the steel transport ramp is located at the exit of the No. 3 ramp of the steel transport ramp, and the steel request delay time is 3600ms during single-line direct rolling.

[0068] Based on the same inventive concept as the control method, embodiments of the present invention also provide an electronic device, including a processor and a memory, the memory being coupled to the processor, the memory storing instructions that, when executed by the processor, cause the electronic device to perform the steps of any of the control methods.

[0069] Based on the same inventive concept as the control method, embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, characterized in that, when the program is executed by a processor, it implements the steps of any of the control methods.

[0070] The technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: This invention provides a casting-rolling interface matching system and a direct rolling control method, which addresses the production needs of multiple modes including composite direct rolling, hot delivery, and cold charging at the casting-rolling interface. Simultaneously, the direct rolling section of this system can achieve highly efficient direct rolling of coiled rebar, producing only a small number of finished billets per casting cycle, and the heating furnace is capable of long-term shutdown. The direct rolling system of this invention supports a direct rolling rate of over 90% for coiled rebar, demonstrating significant value in optimizing production costs.

[0071] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0072] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (modules, systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1A device that provides the functions specified in one or more boxes.

[0073] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0074] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0075] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0076] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A casting-rolling interface matching system, characterized in that: The system includes an insulation cover (1), a collecting roller conveyor (2), a steel conveying roller conveyor (3), a main turntable device (4), a steel separating device (5), a first straight rolling channel (6), a second straight rolling channel (7), a first hot delivery roller conveyor (8), a first turntable device (9), a first steel loading platform (10), a first heating furnace (11), a second hot delivery roller conveyor (12), a second turntable device (13), a second steel loading platform (14), and a second heating furnace (15). The collecting roller conveyor (2) is equipped with a first baffle and a second baffle. The rear end of the collecting roller conveyor is connected to the input end of the main turntable device (4) through the steel conveying roller conveyor (3). The main turntable device (4) has the same structure as the first turntable device (9) and the second turntable device (13). The main turntable device (4), the first turntable device (9), and the second turntable device (13) are located on the steel loading side of the heating furnace. The main turntable device (4) runs along the rolling line direction. The steel passing device (5) is connected to the first straight rolling channel (6) and the second straight rolling channel (7) respectively. The 90-degree output ends of the main turntable device (4) in two directions are connected to the first turntable device (9) and the second turntable device (13) through the first hot conveying roller table (8) and the second hot conveying roller table (12) respectively. The rolling direction input end and output end of the first turntable device (9) are connected to the first steel loading platform (10) and the first heating furnace (11) respectively. The rolling direction input end and output end of the second turntable device (13) are connected to the second steel loading platform (14) and the second heating furnace (15) respectively. The steel turning machine is set between the first baffle and the second baffle. The first baffle and the straightening machine, the collecting roller table (2), the steel conveying roller table (3), the first straight rolling channel (6), the second straight rolling channel (7), the first hot conveying roller table (8) and the second hot conveying roller table (12) are all equipped with heat preservation covers (1).

2. The casting-rolling interface matching system according to claim 1, characterized in that: The steel conveying roller (3) is an inclined roller. The roller speed of the inclined roller is controlled in multiple segments. The initial speed is low, the middle speed is high, and the final speed is low. The climbing angle is no more than 4.5°.

3. The casting-rolling interface matching system according to claim 1, characterized in that: The steel-splitting device (5) includes a steel-splitting arm, a steel-splitting arm connecting frame, a steel-splitting arm driving cylinder, a cylinder electromagnetic control valve, a steel-splitting arm position switch, a sensor, and a steel-splitting area roller conveyor. The straight-rolled billet is transported to the first straight-rolling channel (6) and the second straight-rolling channel (7) through the steel-splitting area roller conveyor.

4. The casting-rolling interface matching system according to claim 1, characterized in that: The first straight rolling channel (6) and the second straight rolling channel (7) are respectively connected to the first rolling line and the second rolling line. The roller group of the first straight rolling channel (6) and the second straight rolling channel (7) is an arc-shaped roller, and the transport rollers are arranged concentrically at different angles.

5. A method for controlling the temperature of billet feeding in direct rolling, characterized in that: The casting-rolling interface matching system according to claims 1-6 includes the following steps: (1) The first baffle and the second baffle are respectively installed in the front and rear of the steel turning machine in the continuous casting area at the front end of the collecting roller conveyor, and the equipment gap in front of the first baffle is equipped with a heat insulation cover; (2) Obtain the billet temperature after the first baffle is released. The billet runs to the first baffle and waits in the heat insulation cover for a certain period of time before being released. The high temperature gauges of each flow measure the billet temperature and transmit the signal and temperature control program. (3) Determine whether the temperature of the billet released by the first baffle meets the temperature standard for direct rolling release; (4) If the billet temperature is lower than the direct rolling temperature requirement, the billet will be removed from the production line by the billet turning machine and direct rolling is not allowed. The billet will be put into the billet warehouse. (5) If the billet temperature meets the direct rolling temperature requirements, the billet turning machine will temporarily stop billet operation and the billet will wait for the direct rolling billet supply signal in front of the second baffle. (6) Determine whether the billet receives the direct rolling program's steel demand signal within the specified waiting time at the second baffle; (7) If no steel demand signal is received within the allowed waiting time, the billet will be removed from the production line by the billet turning machine; If a billet receives a steel demand signal within the allowed waiting time, the second baffle releases it, and the billet is supplied for direct rolling. If there is not only one billet at the second baffle that meets the release requirements, the second baffle implements the release priority rule, that is, the billet with the shortest waiting time at the second baffle is released for direct rolling first.

6. The method for controlling the temperature of billet feeding in direct rolling according to claim 5, characterized in that: The temperature standard for direct rolling release at the first baffle is set to be higher than 950℃. The waiting time for the first baffle and the waiting time for the second baffle are determined by the drawing speed, the speed of each flow roller, and the length of each section of the roller. If the cross-section of the billet is 165 square, the waiting time for the first baffle is 70s and the waiting time for the second baffle is 60s. If the cross-section of the cast billet is 150 square, the waiting time for the first baffle is 50s and the waiting time for the second baffle is 70s.

7. A method for matching the production efficiency of continuous casting and rolling mills, characterized in that... The process includes the following steps: controlling the casting speed by blocking the flow in continuous casting, matching the total casting speed of each flow in continuous casting with the throughput of the first and second rolling mill production lines, controlling the casting efficiency of continuous casting to be slightly lower than the output efficiency of rolling mill production, and adopting high casting speed and low flow rate production control within the maximum range allowed by the continuous casting process and equipment function accuracy.

8. A direct rolling control method, characterized in that... Includes the following steps: (1) Obtain the direct rolling mode, and select the direct rolling mode as double-line direct rolling or single-line direct rolling; (2) Obtain the direct rolling scheme. If it is a dual-line direct rolling mode, the first direct rolling billet is first transported to the first or second direct rolling channel. If it is a single-line direct rolling mode, then the first or second direct rolling channel will be obtained; (3) Determine the status of the direct rolling equipment, the first baffle, the second baffle and the main turntable are clamped, and obtain the status of the steel separating device; (4) If the equipment is in an abnormal state, direct rolling is not allowed; if the equipment is in a normal state, the direct rolling scheme shall be implemented. (5) If it is a double-line direct rolling, the steel-separating arm is guided to the direct rolling scheme supply channel by the cylinder electromagnetic control valve. After the steel-separating arm in the steel-separating device is in place, the proximity switch sends a confirmation signal to the direct rolling program. The direct rolling program sends a steel demand signal to the continuous casting. After receiving the signal, the continuous casting commands the second baffle that meets the temperature control requirements to release steel according to the steel release rules, so that the direct rolling billet enters the direct rolling channel. The direct rolling billet passes through the main turntable equipment and the steel-separating area roller table and enters the rolling line for processing and forming. (6) If it is a single-line direct rolling, the direct rolling scheme is set by controlling the steel-separating arm guide through the cylinder electromagnetic control valve. After the steel-separating arm in the steel-separating device is in place, the proximity switch sends a confirmation signal to the direct rolling program. The direct rolling program sends a steel demand signal to the continuous casting. After receiving the signal, the continuous casting commands the second baffle that meets the requirements to release steel according to the steel release rules, so that the direct-rolled billet enters the direct rolling channel. The direct-rolled billet passes through the main turntable equipment and the steel-separating area roller table and enters the rolling line for processing and forming. (7) After the hot metal detector of the steel conveyor roller table detects the steel billet, it sends a steel demand signal to the continuous casting after a delay, thereby realizing automatic steel demand in the direct rolling process.

9. The direct rolling control method according to claim 8, characterized in that: In step (7), the hot metal detector of the steel conveying roller is arranged at the exit of roller #3 of the steel conveying roller, and the steel demand delay time during single-line direct rolling is 3600ms.

10. A method for safety interlock control of a direct rolling process, characterized in that... The process includes the following steps: (1) The first acquisition module obtains whether the first and second rolling mill production lines have issued a direct rolling fault signal. If the rolling mill production lines have an abnormality, direct rolling needs to be stopped, and a signal is sent to the first judgment module; (2) After the first judgment module receives a fault signal from a certain rolling mill production line and there is no hot steel signal at the hot metal detector of the steel-separating device of the rolling mill production line, the steel-separating arm is forcibly guided to the fault-free rolling line channel. At the same time, the No. 5 and No. 6 rollers of the steel conveying rollers decelerate to avoid the lower support direct rolling billet from entering the wrong channel or causing other accidents; (3) If the first judgment module does not receive a fault signal from the rolling mill production line, the second acquisition module is executed. The second acquisition module obtains the steel-separating device (4) The second judgment module judges whether the steel arm of the steel-splitting device is in position; (5) If the steel arm position switch signal is normal after the cylinder solenoid control valve is activated, the control module allows the direct rolling program to issue a steel demand signal; Specifically, at the start of direct rolling, a steel demand signal is allowed to be issued; during the direct rolling process, after a hot metal detector on the climbing roller table detects the direct rolling billet, a steel demand signal is allowed to be issued; if the steel arm position switch signal is abnormal after the cylinder solenoid control valve is activated, the steel demand signal cannot be issued and direct rolling is not allowed. At the same time, the No. 5 and No. 6 rollers of the direct rolling climbing roller table decelerate to avoid the lower direct rolling billet from entering the wrong channel or causing other accidents.

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