Non-oriented silicon steel fully continuous production system and method

Abstract

The present invention relates to a fully continuous production system for non-oriented silicon steel, which includes a normalizing and pickling section, a continuous rolling section, and an annealing and coating section. The normalizing and pickling section, the continuous rolling section, and the annealing and coating section are arranged in sequence along the running direction of the strip steel to form a continuous production unit. Production line disconnecting mechanisms are provided between the normalizing and pickling section and the continuous rolling section, and between the continuous rolling section and the annealing and coating section. Correspondingly, a fully continuous production method for non-oriented silicon steel is also provided. The present invention enables the hot-rolled coil to complete the production of all cold rolling processes on a single continuous production line, greatly reducing the investment cost and operating cost, shortening the product production cycle, and improving the product quality. Through the production line disconnecting mechanism, the continuous production unit can be decomposed into two or three independent sub-units, which not only improves the process flexibility of the production system, but also ensures that when part of the process sections of the continuous production unit are in an accident state or maintenance condition, the remaining process sections can still continue to produce normally, thereby improving the operating reliability of the production system.

Description

Technical Field

[0001] The present invention relates to a fully continuous production system for non-oriented silicon steel and a fully continuous production method for non-oriented silicon steel. Background Art

[0002] Silicon steel is a basic functional material for national economic construction and an indispensable soft magnetic alloy in the fields of electric power, electrical appliances, and military industry. It is widely used in manufacturing motors, generators, transformers, rectifier cores, and various power electronic components, playing a crucial role in the generation, transmission, and use of electric energy. Its production process is long and the technology is complex.

[0003] The general production process flow of non-oriented silicon steel is: hot metal desulfurization → smelting → vacuum treatment → continuous casting + electromagnetic stirring → hot continuous rolling → (normalizing) + pickling → cold rolling → finish annealing + coating. Each of the above sub-processes has made great progress through years of production and research, and the technology is relatively mature and stable. For the production from hot rolled coils to finished coils, almost all production enterprises globally currently carry out the following processes:

[0004] For medium and high grade products: normalizing and pickling unit → single stand reversing mill → continuous annealing and coating unit → finishing and packaging unit, or normalizing unit → pickling and continuous rolling unit → continuous annealing and coating unit → finishing and packaging unit;

[0005] For medium and low grade products: pickling and continuous rolling unit → continuous annealing and coating unit → finishing and packaging unit.

[0006] According to the existing scheme, for the production from hot rolled coils to finished coils, at least 4 units are configured for medium and high grade products, and at least 3 units are configured for medium and low grade products. An intermediate warehouse with a buffer of 3 - 4 days is configured between each unit for buffering between units; between the front and rear units, the steel coils need to be lifted at least 2 times. It can be seen that the current production process of non-oriented silicon steel has problems such as a long process flow, a large floor area, and high production costs. Summary of the Invention

[0007] The present invention relates to a fully continuous production system and method for non-oriented silicon steel, which can at least solve some defects of the prior art.

[0008] The present invention relates to a fully continuous production system for non-oriented silicon steel, including a normalizing and pickling section, a continuous rolling section, and an annealing and coating section. The normalizing and pickling section, the continuous rolling section, and the annealing and coating section are sequentially connected and arranged along the running direction of the strip steel to form a continuous production unit. A production line disconnection mechanism is provided between the normalizing and pickling section and the continuous rolling section, and between the continuous rolling section and the annealing and coating section.

[0009] As one of the implementation manners, the production line disconnecting mechanism includes a spare slitting shear, a spare coiling device, a spare decoiling device and a spare welder. The spare coiling device is connected to the strip steel outlet of the adjacent previous process section. The spare decoiling device, the spare welder and the strip steel inlet of the adjacent next process section are connected in sequence. The spare slitting shear is arranged at the outlet of the adjacent previous process section and / or the inlet of the adjacent next process section.

[0010] As one of the implementation manners, the normalizing and pickling section is configured with a normalizing and pickling inlet loop and a normalizing and pickling outlet loop; and / or, the annealing and coating section is configured with an annealing and coating inlet loop and an annealing and coating outlet loop.

[0011] As one of the implementation manners, the continuous rolling section is configured with a continuous rolling inlet loop.

[0012] The present invention also relates to a fully continuous production method for non-oriented electrical steel, which is implemented based on the above-mentioned fully continuous production system for non-oriented electrical steel;

[0013] The method includes:

[0014] Under normal production conditions, the incoming coils from upstream are sequentially processed through the normalizing and pickling section, the continuous rolling section and the annealing and coating section to obtain the target product;

[0015] In the event of an accident or during maintenance, at least one set of the production line disconnecting mechanism is put into use to decompose the continuous production unit into two or three independent sub-units, and at least some of the independent sub-units continue to produce.

[0016] Further, the method includes:

[0017] When the normalizing and pickling section fails and stops or needs to be maintained, the spare slitting shear on the inlet side of the continuous rolling section cuts the strip steel. The forward strip steel runs to the continuous rolling spare welder on the inlet side of the continuous rolling section at the tail-swinging speed. The spare decoiler on the inlet side of the continuous rolling section decoils the spare steel coil and threads the strip head to the continuous rolling spare welder. After the continuous rolling spare welder welds the corresponding strip tail and the corresponding strip head, the continuous rolling section and the annealing and coating section continue continuous production.

[0018] Further, the method includes:

[0019] When the continuous rolling section fails and stops or needs to be maintained, the spare slitting shear on the outlet side of the normalizing and pickling section cuts the strip steel. The strip tail of the forward strip steel continues to run forward for a distance D1 to leave the normalizing and pickling section. The strip head of the rearward strip steel runs forward at the threading speed to the spare coiler on the outlet side of the normalizing and pickling section for coiling, and the normalizing and pickling section starts independent continuous production;

[0020] The spare slitting shear on the inlet side of the annealing coating section cuts the strip steel. The forward strip steel runs at the tail-swinging speed to the annealing coating spare welder on the inlet side of the annealing coating section. The spare uncoiler on the inlet side of the annealing coating section unwinds the spare steel coil and threads the leading end to this annealing coating spare welder. After the annealing coating spare welder welds the corresponding strip tail and the corresponding strip head, the annealing coating section starts independent continuous production.

[0021] Further, the method includes

[0022] When a fault occurs and the annealing coating section stops or needs maintenance, the spare slitting shear on the outlet side of the continuous rolling section cuts the strip steel. The tail of the forward strip steel continues to run forward a distance D2 to leave the continuous rolling section. The leading end of the rear strip steel runs forward at the threading speed to the spare coiler on the outlet side of the continuous rolling section for coiling. The normalizing pickling section and the continuous rolling section continue continuous production.

[0023] Further, the method includes:

[0024] When both the normalizing pickling section and the continuous rolling section have a fault and stop or need maintenance, the spare slitting shear on the inlet side of the annealing coating section cuts the strip steel. The forward strip steel runs at the tail-swinging speed to the annealing coating spare welder on the inlet side of the annealing coating section. The spare uncoiler on the inlet side of the annealing coating section unwinds the spare steel coil and threads the leading end to this annealing coating spare welder. After the annealing coating spare welder welds the corresponding strip tail and the corresponding strip head, the annealing coating section starts independent continuous production;

[0025] When both the continuous rolling section and the annealing coating section have a fault and stop or need maintenance, the spare slitting shear on the outlet side of the normalizing pickling section cuts the strip steel. The tail of the forward strip steel continues to run forward a distance D1 to leave the normalizing pickling section. The leading end of the rear strip steel runs forward at the threading speed to the spare coiler on the outlet side of the normalizing pickling section for coiling. The normalizing pickling section starts independent continuous production;

[0026] When both the normalizing pickling section and the annealing coating section have a fault and stop or need maintenance, the spare slitting shears on the inlet side and the outlet side of the continuous rolling section cut the strip steel respectively. Among them, on the inlet side of the continuous rolling section, the forward strip steel runs at the tail-swinging speed to the continuous rolling spare welder on the inlet side of the continuous rolling section. The spare uncoiler on the inlet side of the continuous rolling section unwinds the spare steel coil and threads the leading end to this continuous rolling spare welder. The continuous rolling spare welder welds the corresponding strip tail and the corresponding strip head; at the same time, on the outlet side of the continuous rolling section, the tail of the forward strip steel continues to run forward a distance D2 to leave the continuous rolling section. The leading end of the rear strip steel runs forward at the threading speed to the spare coiler on the outlet side of the continuous rolling section for coiling. The continuous rolling section starts independent continuous production.

[0027] Further, the method includes:

[0028] Spare decoilers on the inlet side of the tandem rolling section and / or spare decoilers on the inlet side of the annealing and coating section are loaded with spare coils, and the spare coils have been uncoiled and threaded to the waiting position for immediate use in case of an accident.

[0029] The present invention has at least the following beneficial effects:

[0030] The present invention arranges the normalizing and pickling section, the tandem rolling section and the annealing and coating section to form a continuous production unit, so that the hot-rolled coil can complete the production of the entire cold-rolling process on a continuous production line, greatly reducing the labor cost, saving the factory floor area, reducing the investment cost and operating cost, shortening the product production cycle, and improving the product quality. Through the production line disconnecting mechanism, the continuous production unit can be decomposed into two or three independent sub-units, which can not only improve the process flexibility of the production system, but also ensure that when some process sections are in an accident state or maintenance condition, the remaining process sections can still continue to produce normally, thereby improving the operating reliability of the production system. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic structural diagram of a non-oriented silicon steel fully continuous production system provided by an embodiment of the present invention. Detailed Embodiments

[0033] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0034] As Figure 1 , an embodiment of the present invention provides a non-oriented silicon steel fully continuous production system, including a normalizing and pickling section, a tandem rolling section and an annealing and coating section. The normalizing and pickling section, the tandem rolling section and the annealing and coating section are sequentially connected and arranged along the strip running direction to form a continuous production unit.

[0035] The normalizing and pickling section is mainly used for normalizing and pickling the hot-rolled silicon steel raw materials, so that the structure of the hot-rolled plate recrystallizes and the precipitates coarsen. At the same time, the scale on the surface of the hot-rolled plate is removed. Preferably, the normalizing and pickling section has the ability to process hot-rolled silicon steel raw materials with a thickness of 1.6 mm to 3.5 mm.

[0036] In one embodiment, as Figure 1 , the normalizing pickling section includes a coil uncoiler of the unit, a normalizing pickling entry shear 3, a normalizing pickling welder 4, a normalizing furnace 7, and a pickling device 9; wherein, the coil uncoiler of the unit adopts a double-coil uncoiler, including a first raw material coil uncoiler 1 and a second raw material coil uncoiler 2; the normalizing pickling entry shear 3 can cut off the parts with unqualified quality at the leading end and the trailing end; the leading end and the trailing end after treatment are welded at the normalizing pickling welder 4, and the normalizing pickling welder 4 can adopt a laser welder or an argon arc welder, etc.

[0037] Preferably, the above normalizing furnace 7 adopts a treatment process of preheating → heating → soaking → cooling, and the strip steel coming out of the normalizing furnace 7 is cooled to below 80°C. Further, a strip steel surface treatment device is arranged between the normalizing furnace 7 and the pickling device 9, for example, a shot blasting machine 8 can be adopted, etc. The normalized strip steel enters the shot blasting machine 8 for shot blasting treatment. Through the high-speed impact of fine shot particles on the strip steel surface, more than 80% of the scale can be removed, and the remaining scale also becomes loose due to shot blasting, so as to facilitate subsequent pickling.

[0038] In one embodiment, the pickling device 9 adopts an HCl pickling mode, and 3 to 5 pickling tanks are set, and the acid concentration of the pickling tanks decreases successively along the running direction of the strip steel. According to the length of the pickling section, preferably, a deviation correction facility is arranged inside the pickling tank for correcting the deviation of the strip steel inside the pickling tank.

[0039] In one embodiment, as Figure 1 , a raw material edge trimming shear 5 is further arranged between the normalizing pickling welder 4 and the normalizing furnace 7, which can perform edge trimming treatment on the welded strip steel, and can cut off the parts with relatively poor edge quality to improve the subsequent rolling effect. The raw material edge trimming shear 5 can adopt a circular shear, etc.

[0040] In one embodiment, the normalizing pickling section is configured with a normalizing pickling entry loop 6 and a normalizing pickling exit loop 10. During normal production, the normalizing pickling entry loop 6 is in a full loop state, which can adjust the production rhythm of the front and back processes and ensure the continuous operation of the unit; the normalizing pickling exit loop 10 is in an empty loop position state.

[0041] The above continuous rolling section is mainly used to continuously roll the hot rolled strip steel to a specified thickness. For example, the hot rolled strip steel with a thickness of 1.6 mm to 3.5 mm can be continuously rolled to a thickness of 0.15 mm to 0.65 mm. The continuous rolling section includes a continuous rolling mill 18, and the continuous rolling mill 18 can adopt a form of three stands or more stands according to different raw materials and finished product specifications. The form of each stand can be a 6-high rolling mill or an 18-high rolling mill, or different combinations of the two, etc.

[0042] In one embodiment, the tandem rolling section is equipped with a tandem rolling entry loop 17, which can adjust the production rhythm of the front and back processes to ensure the continuous operation of the unit. During normal production, the tandem rolling entry loop 17 is in a full loop state.

[0043] The annealing and coating section is mainly used for the recrystallization annealing and coating of an insulating coating on the strip after cold rolling. Preferably, the annealing and coating section is capable of processing cold-rolled silicon steel strips with a thickness of 0.15 mm to 0.65 mm. Preferably, the annealing and coating section includes an annealing furnace 27, a coating machine 28, a coating drying furnace 29, and a finished product coiling device. Among them, the annealing furnace 27 is used for annealing the strip. According to the different speeds of the unit, the form of the annealing furnace 27 can be a single-layer horizontal annealing furnace 27, a multi-layer reciprocating horizontal type, or a vertical + multi-layer reciprocating horizontal + vertical annealing furnace 27. The heating section of the annealing furnace 27 can adopt various forms such as all-gas heating, longitudinal magnetic induction heating + transverse magnetic induction heating, or gas heating + induction heating. The annealed strip enters the coating machine 28 to coat an insulating coating. After the strip surface is coated with the insulating coating, it enters the coating drying furnace 29 to dry the moisture and cure the coating. According to the different speeds of the unit and the types of coatings, the coating drying furnace 29 can adopt forms such as a conventional gas drying furnace, an air-cushion drying furnace, or an infrared drying furnace. The finished product coiling device can adopt a double coiling machine form, including a first finished product coiling machine 33 and a second finished product coiling machine 34. Further preferably, an annealing and coating exit shear 32 is arranged between the coating drying furnace 29 and the finished product coiling device, which is mainly used for shearing the strip welds, sampling, and splitting the coil, etc.

[0044] Furthermore, the above annealing and coating section further includes a degreasing device 25, which is arranged upstream of the annealing furnace 27 and can clean the emulsion or rolling oil on the strip surface. The degreasing device 25 uses a combination of multiple methods such as alkaline cleaning + ultrasonic cleaning + electrolytic cleaning for cleaning.

[0045] Furthermore, the above annealing and coating section further includes a finished product edge trimming shear 31, which is used for trimming the edges of the finished product to shear the strip to the set product width specification. The finished product edge trimming shear 31 can adopt a circular shear, etc.

[0046] In one embodiment, the annealing and coating section is equipped with an annealing and coating entry loop 26 and an annealing and coating exit loop 30. During normal production, the annealing and coating entry loop 26 is in a full loop state, which can adjust the production rhythm of the front and back processes to ensure the continuous operation of the unit. The annealing and coating exit loop 30 is in an empty loop position during normal production, and it is mainly used to store the strip when the channel is changed due to operations such as shearing the weld and sampling in the annealing and coating section to ensure the continuous operation of the unit.

[0047] The normalizing and pickling section and the continuous rolling section can be connected through a guide table, and the continuous rolling section and the annealing and coating section can also be connected through a guide table; however, it is not limited to this process section connection method. For example, a roller conveyor device is also feasible.

[0048] Further optimize the above non-oriented silicon steel fully continuous production system, such as Figure 1 , a production line disconnection mechanism is provided between the normalizing and pickling section and the continuous rolling section, and between the continuous rolling section and the annealing and coating section, so that the above continuous production unit can be decomposed into two or three independent sub-units.

[0049] The non-oriented silicon steel fully continuous production system provided in this embodiment arranges the normalizing and pickling section, the continuous rolling section, and the annealing and coating section to form a continuous production unit, enabling the hot rolled coil to complete the cold rolling full process production on a single continuous production line, greatly reducing labor costs, saving factory floor space, reducing investment costs and operating costs, shortening the product production cycle, and improving product quality. The continuous production unit can be decomposed into two or three independent sub-units through the production line disconnection mechanism, which can not only improve the process flexibility of the production system, but also ensure that when some process sections of the continuous production unit are in an accident state or maintenance condition, the remaining process sections can still continue to produce normally, thereby improving the operation reliability of the production system.

[0050] In one of the embodiments, such as Figure 1 , the production line disconnection mechanism includes a spare slitting shear, a spare coiling device, and a spare uncoiling device. The spare coiling device is connected to the strip steel outlet of the adjacent previous process section, the spare uncoiling device is connected to the strip steel inlet of the adjacent next process section, and the spare slitting shear is arranged at the outlet of the adjacent previous process section and / or the inlet of the adjacent next process section.

[0051] Preferably, slitting shears are provided at both the inlet and outlet of the normalizing and pickling section. The slitting shear on the inlet side of the normalizing and pickling section is the normalizing and pickling inlet shear 3, and the slitting shear on the outlet side of the normalizing and pickling section is the normalizing and pickling outlet shear 11; preferably, slitting shears are provided at both the inlet and outlet of the continuous rolling section. The slitting shear on the inlet side of the continuous rolling section is the continuous rolling inlet shear 15, and the slitting shear on the outlet side of the continuous rolling section is the continuous rolling outlet shear 19; preferably, slitting shears are provided at both the inlet and outlet of the annealing and coating section. The slitting shear on the inlet side of the annealing and coating section is the annealing and coating inlet shear 23, and the slitting shear on the outlet side of the annealing and coating section is the annealing and coating outlet shear 32. Among them, the normalizing and pickling outlet shear 11 and the continuous rolling inlet shear 15 can form the spare slitting shear between the normalizing and pickling section and the continuous rolling section; the continuous rolling outlet shear 19 and the annealing and coating inlet shear 23 can form the spare slitting shear between the continuous rolling section and the annealing and coating section.

[0052] In one of the embodiments, the above-mentioned standby uncoiler adopts a double-uncoiler form, which enables the corresponding independent sub-units to achieve continuous production. Specifically, the above-mentioned standby uncoiler includes a first standby uncoiler, a second standby uncoiler and a standby welder. The uncoiling channels of the first standby uncoiler and the second standby uncoiler are both connected to the standby welder. Preferably, one of the uncoiling channels is designed to be collinear with the continuous production unit.

[0053] Among them, the standby coiler between the normalizing pickling section and the continuous rolling section is defined as the normalizing pickling standby coiler 12, the first standby uncoiler between the normalizing pickling section and the continuous rolling section is defined as the continuous rolling first standby uncoiler 13, and the second standby uncoiler is defined as the continuous rolling second standby uncoiler 14. The above-mentioned continuous rolling entry shear 15 is provided on the uncoiling channels of both the continuous rolling first standby uncoiler 13 and the continuous rolling second standby uncoiler 14. The standby coiler between the continuous rolling section and the annealing coating section is defined as the continuous rolling standby coiler 20, the first standby uncoiler between the continuous rolling section and the annealing coating section is defined as the annealing coating first standby uncoiler 21, and the second standby uncoiler is defined as the annealing coating second standby uncoiler 22. The above-mentioned annealing coating entry shear 23 is provided on the uncoiling channels of both the annealing coating first standby uncoiler 21 and the annealing coating second standby uncoiler 22.

[0054] Under normal production conditions, the standby uncoiler is loaded with standby steel coils to facilitate immediate use in case of accidents. When the standby steel coil has been uncoiled and threaded to the waiting position, the response speed of the production line disconnection mechanism can be further improved to ensure production reliability.

[0055] The standby welder can weld and connect the on-line strip steel with the standby steel coil to achieve connection and continuous production, as well as the connection and input between the steel coils on the two standby uncoilers. The standby welder is arranged between the standby uncoiler and the adjacent next process section. The waiting position of the above-mentioned standby steel coil can be at the standby welder. Among them, the standby welder on the inlet side of the continuous rolling section is the continuous rolling standby welder 16, and the standby welder on the inlet side of the annealing coating section is the annealing coating standby welder 24.

[0056] The embodiment of the present invention also provides a fully continuous production method for non-oriented silicon steel, which is implemented based on the above-mentioned fully continuous production system for non-oriented silicon steel;

[0057] The method includes:

[0058] Under normal production conditions, the incoming coils from upstream are sequentially processed through the normalizing pickling section, the continuous rolling section and the annealing coating section to obtain the target product;

[0059] In case of accidents or maintenance conditions, at least one set of the production line disconnection mechanism is put into use to decompose the continuous production unit into two or three independent sub-units, and at least some of the independent sub-units continue to produce.

[0060] For the above accident state or maintenance condition, in one embodiment, when the normalization pickling section fails and stops or needs maintenance, the standby slitting shear (normalization pickling outlet shear 11 or continuous rolling inlet shear 15) on the inlet side of the continuous rolling section cuts the strip steel. The forward strip steel runs to the continuous rolling standby welder 16 on the inlet side of the continuous rolling section at the tail-swinging speed. The standby uncoiler on the inlet side of the continuous rolling section unwinds the standby steel coil and threads the strip head to the continuous rolling standby welder 16. After the continuous rolling standby welder 16 welds the corresponding strip tail and strip head, the continuous rolling section and the annealing coating section continue continuous production. During this production process, the unit uses silicon steel normalization pickling coils as raw materials to produce silicon steel final products.

[0061] At this point, the normalization pickling section is disconnected from the continuous production system, and then maintenance or fault handling can be started. After the maintenance or fault handling is completed, the strip steel at the outlet of the normalization pickling section is threaded forward to the waiting position at the inlet of the continuous rolling section. After the steel coil running on the standby uncoiler on the inlet side of the continuous rolling section is produced, it is connected to the strip tail on the continuous rolling section on the continuous rolling standby welder 16 to restore the continuous production state of the entire system.

[0062] For the above accident state or maintenance condition, in one embodiment, when the continuous rolling section fails and stops or needs maintenance, the standby slitting shear (i.e., normalization pickling outlet shear 11) on the outlet side of the normalization pickling section cuts the strip steel. The strip tail of the forward strip steel continues to run forward for a distance D1 to leave the normalization pickling section. The strip head of the rearward strip steel runs forward to the standby coiler (i.e., normalization pickling standby coiler 12) on the outlet side of the normalization pickling section at the threading speed for coiling, and the normalization pickling section starts independent continuous production. Optionally, D1 is about 5 m. The standby slitting shear (continuous rolling outlet shear 19 or annealing coating inlet shear 23) on the inlet side of the annealing coating section cuts the strip steel. The forward strip steel runs to the annealing coating standby welder 24 on the inlet side of the annealing coating section at the tail-swinging speed. The standby uncoiler on the inlet side of the annealing coating section unwinds the standby steel coil and threads the strip head to the annealing coating standby welder 24. After the annealing coating standby welder 24 welds the corresponding strip tail and strip head, the annealing coating section starts independent continuous production. During this production process, the unit uses silicon steel hot-rolled coils and silicon steel cold-rolled hard coils as raw materials to produce silicon steel normalization pickling coils and silicon steel final products. Among them, the silicon steel normalization pickling coils can be reserved for use in this production system, or supplied for other rolling mills in the workshop, or sold as intermediate products of normalization pickling.

[0063] At this point, the continuous rolling section is disconnected from the continuous production system, and maintenance or fault handling can begin. After the maintenance or fault handling is completed, after the steel coil being wound on the normalizing pickling standby coiler 12 is fully wound, the strip at the outlet of the normalizing pickling section can be threaded forward to the continuous rolling standby welder 16 and connected to the strip of the continuous rolling section. At the same time, after the steel coil being produced on the standby decoiler on the inlet side of the annealing coating section is fully produced, the strip at the outlet of the continuous rolling section is connected to the strip at the inlet of the annealing coating section at the annealing coating standby welder 24 to resume the continuous production state of the entire system.

[0064] For the above accident state or maintenance condition, in one embodiment, when the annealing coating section fails to stop or needs to be maintained, the standby slitting shear on the outlet side of the continuous rolling section (i.e., the continuous rolling outlet shear 19) cuts the strip. The tail of the forward strip continues to run forward for a distance D2 to leave the continuous rolling section, and the head of the backward strip runs forward at the threading speed to the standby coiler on the outlet side of the continuous rolling section (i.e., the continuous rolling standby coiler 20) for winding. The normalizing pickling section and the continuous rolling section continue continuous production. Optionally, D2 is about 5m. During this production process, the unit uses silicon steel hot-rolled coils as raw materials to produce silicon steel cold hard coils. The silicon steel cold hard coils can be reserved for use in this production system, or supplied to other annealing coating units in the workshop, or sold as intermediate cold hard coil products.

[0065] At this point, the annealing coating section is disconnected from the continuous production system, and maintenance or fault handling can begin. After the maintenance or fault handling is completed, after the steel coil being wound on the continuous rolling standby coiler 20 is fully wound, the strip at the outlet of the continuous rolling section is connected to the strip at the inlet of the annealing coating section at the annealing coating standby welder 24 to resume the continuous production state of the entire system.

[0066] For the above accident state or maintenance condition, in one embodiment, when both the normalizing pickling section and the continuous rolling section fail to stop or need to be maintained, the standby slitting shear on the inlet side of the annealing coating section (the continuous rolling outlet shear 19 or the annealing coating inlet shear 23) cuts the strip. The forward strip runs to the annealing coating standby welder 24 on the inlet side of the annealing coating section at the tail-swinging speed. The standby decoiler on the inlet side of the annealing coating section unwinds the standby steel coil and threads the head to this annealing coating standby welder 24. After the annealing coating standby welder 24 welds the corresponding strip tail and the corresponding strip head, the annealing coating section starts independent continuous production. During this production process, the unit uses silicon steel cold hard coils as raw materials to produce the final silicon steel products.

[0067] For the above accident state or maintenance condition, in one embodiment, when both the continuous rolling section and the annealing and coating section fail to stop or need maintenance, the spare slitting shear on the outlet side of the normalizing and pickling section (i.e., the normalizing and pickling outlet shear 11) cuts the strip steel. The strip tail of the forward strip continues to run forward for a distance D1 to leave the normalizing and pickling section. The strip head of the backward strip runs forward to the spare coiler on the outlet side of the normalizing and pickling section (i.e., the normalizing and pickling spare coiler 12) at the threading speed for coiling, and the normalizing and pickling section starts independent and continuous production. During this production process, the unit uses silicon steel hot-rolled coils as raw materials to produce silicon steel normalizing and pickling coils; the silicon steel normalizing and pickling coils can be reserved for use in this production system, or supplied to other rolling mills in the workshop for production, or sold as intermediate products of normalizing and pickling.

[0068] For the above accident state or maintenance condition, in one embodiment, when both the normalizing and pickling section and the annealing and coating section fail to stop or need maintenance, the spare slitting shear on the inlet side of the continuous rolling section (the normalizing and pickling outlet shear 11 or the continuous rolling inlet shear 15) and the spare slitting shear on the outlet side (i.e., the continuous rolling outlet shear 19) cut the strip steel respectively. Among them, on the inlet side of the continuous rolling section, the forward strip runs to the continuous rolling spare welder 16 on the inlet side of the continuous rolling section at the tail-shedding speed. The spare uncoiler on the inlet side of the continuous rolling section uncoils the spare steel coil and threads the strip head to the continuous rolling spare welder 16, and the continuous rolling spare welder 16 welds the corresponding strip tail and the corresponding strip head; at the same time, on the outlet side of the continuous rolling section, the strip tail of the forward strip continues to run forward for a distance D2 to leave the continuous rolling section, and the strip head of the backward strip runs forward to the spare coiler on the outlet side of the continuous rolling section (i.e., the continuous rolling spare coiler 20) at the threading speed for coiling, and the continuous rolling section starts independent and continuous production. During this production process, the unit uses silicon steel normalizing and pickling coils as raw materials to produce silicon steel cold hard coils; the silicon steel cold hard coils can be reserved for use in this production system, or supplied to other annealing and coating units in the workshop, or sold as intermediate products of cold hard coils.

[0069] As shown above, the spare uncoiler is loaded with a spare steel coil, and this spare steel coil should be able to directly meet the production requirements of the next process section. Among them, the spare steel coil on the spare uncoiler on the inlet side of the continuous rolling section is a silicon steel coil after normalizing and pickling; the spare steel coil on the spare uncoiler on the inlet side of the annealing and coating section is a silicon steel cold hard coil with the specified thickness of the rolled product.

[0070] In addition, preferably, after a set time, if the continuous production unit still maintains normal production conditions, the spare steel coil is put into the continuous production system for production according to the above system disconnection method, and a new spare steel coil is replenished to ensure the quality of the spare steel coil.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An all - continuous production system for non - oriented silicon steel, characterized in that: It includes a normalizing and pickling section, a continuous rolling section, and an annealing and coating section. The normalizing and pickling section, the continuous rolling section, and the annealing and coating section are connected in sequence along the running direction of the strip steel to form a continuous production unit. A production line disconnecting mechanism is provided between the normalizing and pickling section and the continuous rolling section, and between the continuous rolling section and the annealing and coating section; The production line disconnecting mechanism includes a spare slitting shear, a spare coiling device, a spare uncoiling device, and a spare welder. The spare coiling device is connected to the strip steel outlet of the adjacent previous process section. The spare uncoiling device, the spare welder, and the strip steel inlet of the adjacent next process section are connected in sequence. The spare slitting shear is arranged at the outlet of the adjacent previous process section and / or the inlet of the adjacent next process section; The spare uncoiling device adopts a double-uncoiling machine form, and spare steel coils are loaded on the spare uncoiling machines. After a set time, if the continuous production unit still maintains normal production conditions, the production line is disconnected, the spare steel coils are put into the continuous production system for production, and new spare steel coils are replenished; A normalizing and pickling inlet shear is provided on the inlet side of the normalizing and pickling section, and a normalizing and pickling outlet shear is provided on the outlet side of the normalizing and pickling section; a continuous rolling inlet shear is provided on the inlet side of the continuous rolling section, and a continuous rolling outlet shear is provided on the outlet side of the continuous rolling section; an annealing and coating inlet shear is provided on the inlet side of the annealing and coating section, and an annealing and coating outlet shear is provided on the outlet side of the annealing and coating section; the normalizing and pickling outlet shear and the continuous rolling inlet shear constitute the spare slitting shear between the normalizing and pickling section and the continuous rolling section; the continuous rolling outlet shear and the annealing and coating inlet shear constitute the spare slitting shear between the continuous rolling section and the annealing and coating section; The continuous production system has a first working mode. In the first working mode, the normalizing and pickling section is disconnected from the continuous production system. The spare slitting shear on the inlet side of the continuous rolling section cuts the strip steel. The forward strip steel runs to the continuous rolling spare welder on the inlet side of the continuous rolling section at a tailing speed. The spare uncoiling machine on the inlet side of the continuous rolling section uncoils the spare steel coil and makes the leading end pass through to this continuous rolling spare welder. After the continuous rolling spare welder welds the corresponding strip tail and the corresponding leading end, the continuous rolling section and the annealing and coating section continue continuous production; The unit uses silicon steel normalizing and pickling coils as raw materials to produce silicon steel final products; The continuous production system has a second working mode. In the second working mode, the continuous rolling section is disconnected from the continuous production system. The spare slitting shear on the outlet side of the normalizing and pickling section cuts the strip steel. The strip tail of the forward strip steel continues to run forward for a distance D1 to leave the normalizing and pickling section. The leading end of the rearward strip steel runs forward at a threading speed to the spare coiling machine on the outlet side of the normalizing and pickling section for coiling. The normalizing and pickling section starts independent continuous production; The spare slitting shear on the inlet side of the annealing and coating section cuts the strip steel. The forward strip steel runs to the annealing and coating spare welder on the inlet side of the annealing and coating section at a tailing speed. The spare uncoiling machine on the inlet side of the annealing and coating section uncoils the spare steel coil and makes the leading end pass through to this annealing and coating spare welder. After the annealing and coating spare welder welds the corresponding strip tail and the corresponding leading end, the annealing and coating section starts independent continuous production; The unit uses silicon steel hot-rolled coils and silicon steel cold-hardened coils as raw materials to produce silicon steel normalizing and pickling coils and silicon steel final products; The continuous production system has a third working mode. In the third working mode, the annealing and coating section is disconnected from the continuous production system. The spare slitting shear on the outlet side of the continuous rolling section cuts the strip steel. The trailing end of the forward strip steel continues to move forward a distance D2 to leave the continuous rolling section. The leading end of the rearward strip steel moves forward at the threading speed to the spare coiler on the outlet side of the continuous rolling section for coiling. The normalizing and pickling section and the continuous rolling section continue continuous production. The unit uses hot-rolled silicon steel coils as raw materials to produce cold-rolled and hardened silicon steel coils. The continuous production system has a fourth working mode. In the fourth working mode, the normalizing and pickling section and the continuous rolling section are disconnected from the continuous production system. The spare slitting shear on the inlet side of the annealing and coating section cuts the strip steel. The forward strip steel runs at the tail-shedding speed to the annealing and coating spare welder on the inlet side of the annealing and coating section. The spare uncoiler on the inlet side of the annealing and coating section uncoils the spare steel coil and threads the leading end to the annealing and coating spare welder. After the annealing and coating spare welder welds the corresponding trailing end and the corresponding leading end, the annealing and coating section starts independent continuous production. The unit uses cold-rolled and hardened silicon steel coils as raw materials to produce the final silicon steel products. The continuous production system has a fifth working mode. In the fifth working mode, the continuous rolling section and the annealing and coating section are disconnected from the continuous production system. The spare slitting shear on the outlet side of the normalizing and pickling section cuts the strip steel. The trailing end of the forward strip steel continues to move forward a distance D1 to leave the normalizing and pickling section. The leading end of the rearward strip steel moves forward at the threading speed to the spare coiler on the outlet side of the normalizing and pickling section for coiling. The normalizing and pickling section starts independent continuous production. The unit uses hot-rolled silicon steel coils as raw materials to produce normalized and pickled silicon steel coils. The continuous production system has a sixth working mode. In the sixth working mode, the normalizing and pickling section and the annealing and coating section are disconnected from the continuous production system. The spare slitting shears on the inlet side and the outlet side of the continuous rolling section cut the strip steel respectively. Among them, on the inlet side of the continuous rolling section, the forward strip steel runs at the tail-shedding speed to the continuous rolling spare welder on the inlet side of the continuous rolling section. The spare uncoiler on the inlet side of the continuous rolling section uncoils the spare steel coil and threads the leading end to the continuous rolling spare welder. The continuous rolling spare welder welds the corresponding trailing end and the corresponding leading end. At the same time, on the outlet side of the continuous rolling section, the trailing end of the forward strip steel continues to move forward a distance D2 to leave the continuous rolling section. The leading end of the rearward strip steel moves forward at the threading speed to the spare coiler on the outlet side of the continuous rolling section for coiling. The continuous rolling section starts independent continuous production. The unit uses normalized and pickled silicon steel coils as raw materials to produce cold-rolled and hardened silicon steel coils.

2. The non-oriented silicon steel fully continuous production system according to claim 1, wherein: The normalizing and pickling section is equipped with a normalizing and pickling inlet loop and a normalizing and pickling outlet loop; and / or, the annealing and coating section is equipped with an annealing and coating inlet loop and an annealing and coating outlet loop.

3. The non-oriented silicon steel fully continuous production system according to claim 1, wherein: The continuous rolling section is equipped with a continuous rolling inlet loop.

4. A fully continuous production method for non-oriented silicon steel, characterized in that, Implemented based on the non-oriented silicon steel fully continuous production system according to any one of claims 1 to 3; The method includes: Under normal production conditions, the incoming coils from upstream are sequentially processed through the normalizing and pickling section, the continuous rolling section, and the annealing and coating section to obtain the target products. In the accident state or during the maintenance condition, at least one set of the production line disconnection mechanisms is put into use, decomposing the continuous production unit into two or three independent sub-units, and at least some of the independent sub-units continue to produce; When a fault occurs and the normalizing and pickling section stops or needs maintenance, the spare slitting shear on the inlet side of the continuous rolling section cuts the strip steel. The forward strip steel runs at the tail-swinging speed to the continuous rolling spare welder on the inlet side of the continuous rolling section. The spare uncoiler on the inlet side of the continuous rolling section unwinds the spare steel coil and threads the leading end to this continuous rolling spare welder. After the continuous rolling spare welder welds the corresponding strip tail and the corresponding strip head, the continuous rolling section and the annealing and coating section continue continuous production; When a fault occurs and the continuous rolling section stops or needs maintenance, the spare slitting shear on the outlet side of the normalizing and pickling section cuts the strip steel. The strip tail of the forward strip steel continues to run forward for a distance D1 to leave the normalizing and pickling section. The leading end of the rearward strip steel runs forward at the threading speed to the spare coiler on the outlet side of the normalizing and pickling section for coiling, and the normalizing and pickling section starts independent continuous production; The spare slitting shear on the inlet side of the annealing and coating section cuts the strip steel. The forward strip steel runs at the tail-swinging speed to the annealing and coating spare welder on the inlet side of the annealing and coating section. The spare uncoiler on the inlet side of the annealing and coating section unwinds the spare steel coil and threads the leading end to this annealing and coating spare welder. After the annealing and coating spare welder welds the corresponding strip tail and the corresponding strip head, the annealing and coating section starts independent continuous production; When a fault occurs and the annealing and coating section stops or needs maintenance, the spare slitting shear on the outlet side of the continuous rolling section cuts the strip steel. The strip tail of the forward strip steel continues to run forward for a distance D2 to leave the continuous rolling section. The leading end of the rearward strip steel runs forward at the threading speed to the spare coiler on the outlet side of the continuous rolling section for coiling, and the normalizing and pickling section and the continuous rolling section continue continuous production; When faults occur and both the normalizing and pickling section and the continuous rolling section stop or need maintenance, the spare slitting shear on the inlet side of the annealing and coating section cuts the strip steel. The forward strip steel runs at the tail-swinging speed to the annealing and coating spare welder on the inlet side of the annealing and coating section. The spare uncoiler on the inlet side of the annealing and coating section unwinds the spare steel coil and threads the leading end to this annealing and coating spare welder. After the annealing and coating spare welder welds the corresponding strip tail and the corresponding strip head, the annealing and coating section starts independent continuous production; When faults occur and both the continuous rolling section and the annealing and coating section stop or need maintenance, the spare slitting shear on the outlet side of the normalizing and pickling section cuts the strip steel. The strip tail of the forward strip steel continues to run forward for a distance D1 to leave the normalizing and pickling section. The leading end of the rearward strip steel runs forward at the threading speed to the spare coiler on the outlet side of the normalizing and pickling section for coiling, and the normalizing and pickling section starts independent continuous production; When both the normalizing pickling section and the annealing coating section fail and stop or need maintenance, the spare slitting shears on the inlet side and the outlet side of the continuous rolling section cut the strip steel respectively. Among them, on the inlet side of the continuous rolling section, the forward strip steel runs to the continuous rolling spare welder on the inlet side of the continuous rolling section at the tail-swinging speed. The spare uncoiler on the inlet side of the continuous rolling section unwinds the spare steel coil and guides the leading end of the strip to the continuous rolling spare welder, and the continuous rolling spare welder welds the corresponding strip tail and the corresponding strip head. At the same time, on the outlet side of the continuous rolling section, the strip tail of the forward strip steel continues to run forward for a distance D2 to leave the continuous rolling section, and the leading end of the rearward strip steel runs forward to the spare coiler on the outlet side of the continuous rolling section at the threading speed for coiling, and the continuous rolling section starts independent and continuous production. The spare uncoiler on the inlet side of the continuous rolling section and / or the spare uncoiler on the inlet side of the annealing coating section is loaded with spare steel coils, and the spare steel coils have been unwound and threaded to the waiting position so as to be immediately put into use in case of an accident. After a set time, if the continuous production unit still maintains normal production conditions, the production line is disconnected, the spare steel coils are put into the continuous production system for production, and new spare steel coils are replenished.

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