CN115634929A - Full-continuous production system and method for non-oriented silicon steel - Google Patents
Full-continuous production system and method for non-oriented silicon steel Download PDFInfo
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- 238000010924 continuous production Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 63
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 48
- 238000005096 rolling process Methods 0.000 claims abstract description 158
- 239000011248 coating agent Substances 0.000 claims abstract description 133
- 238000000576 coating method Methods 0.000 claims abstract description 133
- 238000000137 annealing Methods 0.000 claims abstract description 127
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 122
- 239000010959 steel Substances 0.000 claims abstract description 122
- 238000005554 pickling Methods 0.000 claims abstract description 113
- 238000004519 manufacturing process Methods 0.000 claims abstract description 64
- 230000008569 process Effects 0.000 claims abstract description 34
- 238000012423 maintenance Methods 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 108010001267 Protein Subunits Proteins 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 34
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims 1
- 238000005097 cold rolling Methods 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 24
- 239000002994 raw material Substances 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
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- 239000010410 layer Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
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Abstract
The invention relates to a full-continuous production system for non-oriented silicon steel, which comprises a normalized pickling section, a continuous rolling section and an annealing coating section, wherein the normalized pickling section, the continuous rolling section and the annealing coating section are sequentially connected and arranged along the running direction of strip steel to form a continuous production unit, and production line disconnection mechanisms are arranged between the normalized pickling section and the continuous rolling section and between the continuous rolling section and the annealing coating section. Correspondingly, a full-continuous production method of the non-oriented silicon steel is also provided. The invention enables the hot rolled coil to finish the production of the whole cold rolling process on a continuous production line, greatly reduces the investment cost and the running cost, shortens the production period of products and improves the quality of the products; the production line disconnecting mechanism can divide the continuous production unit into two or three independent sub-units, so that the process flexibility of the production system can be improved, and the continuous production unit can be ensured to continue normal production in other process sections when part of the process sections are in an accident state or in a maintenance working condition, so that the operation reliability of the production system is improved.
Description
Technical Field
The invention relates to a non-oriented silicon steel full-continuous production system and a non-oriented silicon steel full-continuous production method.
Background
Silicon steel is a basic functional material for national economic construction, is an indispensable soft magnetic alloy in the fields of electric power, electric appliances, military industry and the like, is widely used for manufacturing motors, generators, transformers, rectifier cores and various power electronic components, and plays a key role in the aspects of generation, transmission and use of electric energy. The production flow is long and the process is complex.
The general production process flow of the non-oriented silicon steel comprises the following steps: molten iron desulfurization → smelting → vacuum treatment → continuous casting + electromagnetic stirring → hot continuous rolling → (normalizing) + acid washing → cold rolling → finished product annealing + coating. The sub-processes are developed greatly through production and research for many years, and the technology is mature and stable. From hot-rolled coil to finished coil production, almost all production enterprises around the world currently perform the following steps:
medium and high grade products: the method comprises the following steps of (1) normalizing the pickling line → a single-stand reversible rolling mill → a continuous annealing coating line → a finishing packaging line, or normalizing the pickling line → a pickling continuous rolling line → a continuous annealing coating line → a finishing packaging line;
and (3) medium and low grade products: acid pickling continuous rolling mill set → continuous annealing coating machine set → finishing packaging machine set.
According to the existing scheme, from the production of hot rolled coils to finished coils, at least 4 machine sets are configured for middle and high grade products, at least 3 machine sets are configured for middle and low grade products, and 3-4-day intermediate storehouses are configured among the machine sets and used for buffering among the machine sets; between two units in front and back, the coil of strip needs 2 handling at least. It can be seen that the existing production process of non-oriented silicon steel has the problems of longer flow, larger occupied area, higher production cost and the like.
Disclosure of Invention
The invention relates to a full-continuous production system and method of non-oriented silicon steel, which can at least solve part of defects in the prior art.
The invention relates to a full-continuous production system of non-oriented silicon steel, which comprises a normalized pickling section, a continuous rolling section and an annealing coating section, wherein the normalized pickling section, the continuous rolling section and the annealing coating section are sequentially connected and arranged along the running direction of strip steel to form a continuous production unit, and production line disconnecting mechanisms are arranged between the normalized pickling section and the continuous rolling section and between the continuous rolling section and the annealing coating section.
As one embodiment, the production line disconnecting mechanism comprises a standby slitting shear, a standby coiling device, a standby uncoiling device and a standby welding machine, the standby coiling device is connected with the strip steel outlet of the adjacent previous process section, the standby uncoiling device, the standby welding machine and the strip steel inlet of the adjacent next process section are sequentially connected, and the standby slitting shear is arranged at the outlet of the adjacent previous process section and/or the inlet of the adjacent next process section.
As one embodiment, the normalized pickling section is provided with a normalized pickling inlet loop and a normalized pickling outlet loop; and/or the annealing coating section is provided with an annealing coating inlet loop and an annealing coating outlet loop.
As an embodiment, the continuous rolling section is provided with a continuous rolling inlet loop.
The invention also relates to a full-continuous production method of the non-oriented silicon steel, which is implemented based on the full-continuous production system of the non-oriented silicon steel;
the method comprises the following steps:
under the normal production condition, the upstream incoming coil is sequentially treated by the normalized pickling section, the continuous rolling section and the annealing coating section to obtain a target product;
and when the accident state or the maintenance working condition is met, at least one group of production line disconnecting mechanisms is put into use, the continuous production unit is decomposed into two or three independent sub-units, and at least part of the independent sub-units continue to produce.
Further, the method comprises:
when the normalized pickling section breaks down and stops or needs to be overhauled, the standby slitting shear on the inlet side of the continuous rolling section cuts off strip steel, the strip steel moves to a continuous rolling standby welding machine on the inlet side of the continuous rolling section at a tail-flicking speed, the standby uncoiler on the inlet side of the continuous rolling section uncoils a standby steel coil and enables a strip head to penetrate to the continuous rolling standby welding machine, and after the corresponding strip tail and the corresponding strip head are welded by the continuous rolling standby welding machine, the continuous rolling section and the annealing coating section continue to produce continuously.
Further, the method comprises:
when the continuous rolling section breaks down and stops or needs to be overhauled, the standby slitting shear at the outlet side of the normalized pickling section cuts off the strip steel, the strip tail of the strip steel which moves forwards continues to move forwards for a distance D1 to be away from the normalized pickling section, the strip head of the strip steel which moves backwards forwards at a strip penetrating speed to a standby coiling machine at the outlet side of the normalized pickling section for coiling, and the normalized pickling section starts to produce independently and continuously;
the standby cutting shear at the inlet side of the annealing coating section cuts off the strip steel, the forward strip steel runs to the standby annealing coating welder at the inlet side of the annealing coating section at the tail flicking speed, the standby uncoiler at the inlet side of the annealing coating section uncoils the standby steel coil and enables the strip head to penetrate to the standby annealing coating welder, and after the standby annealing coating welder welds the corresponding strip tail and the corresponding strip head, the annealing coating section starts to produce independently and continuously.
Further, the method comprises
When the annealing coating section breaks down and stops or needs to be overhauled, the spare slitting shear at the outlet side of the continuous rolling section cuts off the strip steel, the strip tail of the strip steel which moves forwards continues to move forwards for a distance D2 to leave the continuous rolling section, the strip head of the strip steel which moves backwards moves forwards at a strip penetrating speed to a spare coiling machine at the outlet side of the continuous rolling section for coiling, and the normalized pickling section and the continuous rolling section continue to carry out continuous production.
Further, the method comprises:
when the normalized pickling section and the continuous rolling section are in failure and stop or need to be overhauled, the standby slitting shear at the inlet side of the annealing coating section cuts off the strip steel, the forward strip steel runs to the annealing coating standby welding machine at the inlet side of the annealing coating section at the tail-flicking speed, the standby uncoiler at the inlet side of the annealing coating section uncoils the standby steel coil and enables the strip head to penetrate to the annealing coating standby welding machine, and after the annealing coating standby welding machine welds the corresponding strip tail and the corresponding strip head, the annealing coating section starts independent continuous production;
when the continuous rolling section and the annealing coating section are in failure and stop or need to be overhauled, the standby slitting shear at the outlet side of the normalized pickling section cuts off the strip steel, the strip tail of the forward strip steel continuously moves forwards for a distance D1 to leave the normalized pickling section, the strip head of the backward strip steel forwards moves to a standby coiling machine at the outlet side of the normalized pickling section at a strip threading speed to be coiled, and the normalized pickling section starts independent and continuous production;
when the normalized pickling section and the annealing coating section are in failure and stop or need to be overhauled, the standby slitting scissors at the inlet side and the outlet side of the continuous rolling section respectively cut off the strip steel, wherein at the inlet side of the continuous rolling section, the forward strip steel runs to a standby tandem rolling welder at the inlet side of the continuous rolling section at the tail flicking speed, a standby uncoiler at the inlet side of the continuous rolling section uncoils a standby steel coil and enables a strip head to penetrate to the standby tandem rolling welder, and the standby tandem rolling welder welds a corresponding strip tail and a corresponding strip head; meanwhile, at the outlet side of the continuous rolling section, the strip tail of the forward strip steel continuously moves forwards by a distance D2 to leave the continuous rolling section, the strip head of the backward strip steel moves forwards at a strip penetrating speed to a standby coiling machine at the outlet side of the continuous rolling section for coiling, and the continuous rolling section starts independent continuous production.
Further, the method comprises:
and a spare steel coil is loaded on the spare uncoiler at the inlet side of the continuous rolling section and/or the spare uncoiler at the inlet side of the annealing coating section, and the spare steel coil is uncoiled and threaded to a waiting position so as to be immediately put into use in an accident state.
The invention has at least the following beneficial effects:
the invention arranges the normalized pickling section, the continuous rolling section and the annealing coating section into a continuous production unit, so that the production of the whole cold rolling process can be finished on a continuous production line by the hot rolled coil, thereby greatly reducing the labor cost, saving the occupied area of a factory, reducing the investment cost and the operation cost, shortening the production period of products and improving the quality of the products. The production line disconnecting mechanism can divide the continuous production unit into two or three independent sub-units, so that the process flexibility of the production system can be improved, and the continuous production unit can be ensured to continue normal production in other process sections when part of the process sections are in an accident state or in a maintenance working condition, so that the operation reliability of the production system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a non-oriented silicon steel full-continuous production system provided in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the invention provides a full-continuous production system for non-oriented silicon steel, which comprises a normalizing pickling section, a continuous rolling section and an annealing coating section, wherein the normalizing pickling section, the continuous rolling section and the annealing coating section are sequentially connected and arranged along the running direction of strip steel to form a continuous production unit.
The normalizing and pickling section is mainly used for normalizing and pickling the hot rolled silicon steel raw material, so that the hot rolled plate structure is recrystallized, precipitates are coarsened, and meanwhile, iron scales on the surface of the hot rolled plate are removed. Preferably, the normalizing pickling section has the capability of treating 1.6mm to 3.5mm of hot rolled silicon steel raw material.
In one embodiment, as shown in fig. 1, the normalizing pickling section comprises a unit uncoiler, a normalizing pickling inlet shear 3, a normalizing pickling welder 4, a normalizing furnace 7 and a pickling device 9; the unit uncoiling device adopts a double uncoiling device and comprises a first raw material uncoiler 1 and a second raw material uncoiler 2; the normalized pickling entry shears 3 can shear off unqualified parts of the head and the tail of the strip; the treated strip head and the treated strip tail are welded at a normalizing pickling welder 4, and the normalizing pickling welder 4 can adopt a laser welder or an argon arc welder and the like.
Preferably, the normalizing furnace 7 adopts a preheating → heating → soaking → cooling treatment process, and the strip steel coming out of the normalizing furnace 7 is cooled to below 80 ℃. 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 and the like can be adopted, the normalized strip steel enters the shot blasting machine 8 for shot blasting treatment, more than 80% of iron scales can be removed by striking the surface of the strip steel at a high speed through fine shot particles, and the rest of the iron scales become loose due to shot blasting, so that subsequent pickling is facilitated.
In one embodiment, the pickling device 9 adopts an HCl pickling mode, and is provided with 3-5 sections of pickling tanks, and the acid liquor concentration of the pickling tanks is gradually decreased along the running direction of the strip steel. According to the length of the pickling section, a deviation rectifying facility is preferably arranged inside the pickling tank and used for rectifying deviation of the strip steel inside the pickling tank.
In one embodiment, as shown in fig. 1, a raw material trimming shear 5 is further arranged between the normalizing acid cleaning welding machine 4 and the normalizing furnace 7, so that trimming treatment can be performed on the welded strip steel, and the part with poor edge quality can be cut off, so as to improve the subsequent rolling effect. The raw material edge-cutting shears 5 can adopt disc shears and the like.
In one embodiment, the normalized pickling section is provided with a normalized pickling inlet loop 6 and a normalized pickling outlet loop 10, and during normal production, the normalized pickling inlet loop 6 is in a full loop state, so that the production rhythm of the front and rear processes can be adjusted, and the continuous operation of a unit is ensured; the normalized pickling outlet loop 10 is in an empty loop position state.
The continuous rolling section is mainly used for continuously rolling a hot rolled strip to a predetermined thickness, and for example, a hot rolled strip having a thickness of 1.6mm to 3.5mm can be continuously rolled to a thickness of 0.15mm to 0.65mm. The continuous rolling section includes a continuous rolling mill 18, and the continuous rolling mill 18 may be in the form of three or more stands, each of which may be in the form of a 6-roll mill or an 18-roll mill, or a different combination of the two, etc., depending on the specifications of the raw material and the finished product.
In one embodiment, the continuous rolling section is provided with a continuous rolling inlet loop 17, so that the production rhythm of the front and rear processes can be adjusted, the continuous operation of the unit is ensured, and the continuous rolling inlet loop 17 is in a full loop state during normal production.
The annealing coating section is mainly used for recrystallization annealing of the cold-rolled strip steel and coating of an insulating coating, and preferably, the annealing coating section is used for processing a 0.15-0.65 mm cold-rolled silicon steel strip. Preferably, the annealing coating section comprises an annealing furnace 27, a coating machine 28, a coating drying furnace 29 and a finished product coiling device; the annealing furnace 27 is used for annealing the strip steel, and the annealing furnace 27 can be a single-layer horizontal annealing furnace 27, a multi-layer reciprocating horizontal annealing furnace, or a vertical type + multi-layer reciprocating horizontal type + vertical annealing furnace 27 according to different unit speeds; the heating section of the annealing furnace 27 may be of various types, such as a full gas heating type, a longitudinal magnetic induction heating and a transverse magnetic induction heating type, or a gas heating and an induction heating type. The annealed strip steel enters a coating machine 28 to be coated with an insulating coating; the surface of the strip steel is coated with the insulating coating and then enters a coating drying furnace 29 to dry moisture and solidify the coating, and the coating drying furnace 29 can adopt a conventional gas drying furnace, an air cushion type drying furnace or an infrared drying furnace and other forms according to the speed of a machine set and the type of the coating; the finished product take-up device may take the form of a double take-up machine comprising a first finished product take-up 33 and a second finished product take-up 34; further preferably, an annealing coating outlet shear 32 is arranged between the coating drying furnace 29 and the finished product coiling device, and is mainly used for strip steel shearing welding seams, sampling, coil splitting and the like.
Further, the annealing coating section further comprises a degreasing device 25, the degreasing device 25 is arranged at the upstream of the annealing furnace 27 and can be used for cleaning emulsion or rolling oil on the surface of the strip steel, and the degreasing device 25 is cleaned in a combination of various modes such as alkali liquor cleaning, ultrasonic cleaning and electrolytic cleaning.
Further, the annealing coating section further comprises a finished product trimming shear 31 for trimming the finished product and shearing the strip steel to a set product width specification; the finished edge trimmer 31 may be a circle trimmer or the like.
In one embodiment, the annealing coating section is provided with an annealing coating inlet loop 26 and an annealing coating outlet loop 30, and during normal production, the annealing coating inlet loop 26 is in a full loop state, so that the production rhythm of the front and rear processes can be adjusted, and the continuous operation of the unit is ensured; the annealing coating outlet loop 30 is in an empty state during normal production, and is mainly used for storing strip steel when channels are changed in an annealing coating section due to operations such as welding line shearing, sampling and the like, so as to ensure continuous operation of a unit.
The normalizing pickling section and the continuous rolling section can be connected through a guide plate table, and the continuous rolling section and the annealing coating section can also be connected through the guide plate table; but not limited to, the process section joining means, such as a roll conveyor, are also possible.
Further optimizing the non-oriented silicon steel full-continuous production system, as shown in fig. 1, production line disconnecting mechanisms are arranged between the normalizing pickling section and the continuous rolling section and between the continuous rolling section and the annealing coating section, so that the continuous production unit can be decomposed into two or three independent sub-units.
The non-oriented silicon steel full-continuous production system provided by the embodiment arranges the normalized pickling section, the continuous rolling section and the annealing coating section to form a continuous production unit, so that the production of a cold rolling whole process can be completed on a continuous production line by a hot rolled coil, the labor cost is greatly reduced, the occupied area of a factory is saved, the investment cost and the operation cost are reduced, the production period of a product is shortened, and the product quality is improved. The production line disconnecting mechanism can decompose the continuous production unit into two or three independent sub-units, so that the process flexibility of the production system can be improved, and the continuous production unit can be ensured to continue normal production in other process sections when part of the process sections are in an accident state or a maintenance working condition, thereby improving the operation reliability of the production system.
In one embodiment, as shown in fig. 1, the production line breaking mechanism comprises a standby slitting shear, a standby reel engaged with the strip steel outlet of the adjacent previous process section, and a standby reel engaged with the strip steel inlet of the adjacent next process section, and a standby uncoiler arranged at the outlet of the adjacent previous process section and/or the inlet of the adjacent next process section.
Preferably, slitting shears are arranged at the inlet and the outlet of the normalizing pickling section, the slitting shear at the inlet side of the normalizing pickling section is normalizing pickling inlet shear 3, and the slitting shear at the outlet side of the normalizing pickling section is normalizing pickling outlet shear 11; preferably, slitting shears are arranged at an inlet and an outlet of the continuous rolling section, the slitting shear at the inlet side of the continuous rolling section is a continuous rolling inlet shear 15, and the slitting shear at the outlet side of the continuous rolling section is a continuous rolling outlet shear 19; preferably, a cutting shear is provided at both the inlet and the outlet of the annealing coating section, the cutting shear at the inlet side of the annealing coating section is an annealing coating inlet shear 23, and the cutting shear at the outlet side of the annealing coating section is an annealing coating outlet shear 32. Wherein, the normalized pickling outlet shears 11 and the continuous rolling inlet shears 15 can form standby slitting shears between the normalized pickling section and the continuous rolling section; the tandem mill exit shears 19 and the annealed coating entry shears 23 may constitute spare slitting shears between the tandem mill section and the annealed coating section.
In one embodiment, the standby uncoiling device is in a double uncoiler form, so that the corresponding independent sub-unit can realize continuous production; specifically, the standby uncoiling device comprises a first standby uncoiling machine, a second standby uncoiling machine and a standby welding machine, an uncoiling channel of the first standby uncoiling machine and an uncoiling channel of the second standby uncoiling machine are both connected with the standby welding machine, and one uncoiling channel is preferably designed to be collinear with the continuous production unit.
Wherein, the standby coiler between the normalized pickling section and the continuous rolling section is defined as a normalized pickling standby coiler 12, the first standby uncoiler between the normalized pickling section and the continuous rolling section is a continuous rolling first standby uncoiler 13, and the second standby uncoiler is a continuous rolling second standby uncoiler 14; the decoiling channel of the continuous rolling first standby decoiler 13 and the decoiling channel of the continuous rolling second standby decoiler 14 are both provided with the continuous rolling inlet shears 15. Defining a standby coiler between the continuous rolling section and the annealing coating section as a continuous rolling standby coiler 20, a first standby uncoiler between the continuous rolling section and the annealing coating section as an annealing coating first standby uncoiler 21, and a second standby uncoiler as an annealing coating second standby uncoiler 22; the annealing coating inlet shears 23 are arranged on the uncoiling channel of the annealing coating first standby uncoiler 21 and the uncoiling channel of the annealing coating second standby uncoiler 22.
Under the normal production condition, the spare steel coil is loaded on the spare uncoiler so as to be immediately put into use in an accident state; when the standby steel coil is uncoiled and threaded to a waiting position for waiting, the response speed of the production line disconnecting mechanism can be further improved, and the production reliability is ensured.
The standby welding machine can weld the online strip steel and the standby steel coil to realize connection and continuous production, and connection between the steel coils on the two standby uncoilers. The standby welder is arranged between the standby unwinder and the next adjacent process section, where the standby position of the standby coil can be located. Wherein, the spare welder at the inlet side of the continuous rolling section is a spare welder 16 for continuous rolling, and the spare welder at the inlet side of the annealing coating is a spare welder 24 for annealing coating.
The embodiment of the invention also provides a non-oriented silicon steel full-continuous production method which is implemented based on the non-oriented silicon steel full-continuous production system;
the method comprises the following steps:
under the normal production condition, the upstream incoming coil is sequentially treated by the normalized pickling section, the continuous rolling section and the annealing coating section to obtain a target product;
and when the accident state or the maintenance working condition is met, at least one group of production line disconnecting mechanisms is put into use, the continuous production unit is decomposed into two or three independent sub-units, and at least part of the independent sub-units continue to produce.
For the above accident state or the maintenance condition, in one embodiment, when the normalized pickling section fails and stops or needs to be maintained, the standby slitting shear (the normalized pickling outlet shear 11 or the 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 standby continuous rolling welder 16 on the inlet side of the continuous rolling section at the tail-flicking speed, the standby uncoiler on the inlet side of the continuous rolling section uncoils the standby steel coil and leads the strip head to penetrate to the standby continuous rolling welder 16, and after the standby continuous rolling welder 16 welds the corresponding strip tail and the corresponding strip head, the continuous rolling section and the annealing coating section continue to be continuously produced. In the production process, the machine set takes the normalized acid-washed coil of the silicon steel as a raw material to produce and obtain the final finished product of the silicon steel.
At this moment, the normalized pickling section is disconnected from the continuous production system, and then the maintenance or fault treatment can be started; after the maintenance or fault treatment is finished, the strip steel at the outlet of the normalized pickling section is forwardly threaded to a waiting position at the inlet of the continuous rolling section for waiting, and after the steel coil running on the standby uncoiler at the inlet of the continuous rolling section is produced, the strip steel is connected with the strip tail of the continuous rolling section on a standby welding machine 16 for continuous rolling, so that the continuous production state of the whole system is recovered.
For the above accident state or the maintenance working condition, in one embodiment, when the continuous rolling section is stopped due to a fault or needs to be maintained, the standby slitting shear (i.e. the normalized pickling exit shear 11) at the outlet side of the normalized pickling section cuts off the strip steel, the strip tail of the strip steel in the forward moving process continues to move forward for a distance D1 to leave the normalized pickling section, the strip head of the strip steel in the backward moving process moves forward to the standby coiler (i.e. the normalized pickling standby coiler 12) at the outlet side of the normalized pickling section at the strip threading speed for coiling, and the normalized pickling section starts to produce independently and continuously; wherein, optionally, D1 is around 5 m. The standby cutting shears (the tandem rolling outlet shears 19 or the annealing coating inlet shears 23) on the inlet side of the annealing coating section cut the strip steel, the forward strip steel runs to an annealing coating standby welding machine 24 on the inlet side of the annealing coating section at a tail-flicking speed, a standby uncoiler on the inlet side of the annealing coating section uncoils a standby steel coil and enables a strip head to penetrate to the annealing coating standby welding machine 24, and after the corresponding strip tail and the corresponding strip head are welded by the annealing coating standby welding machine 24, the annealing coating section starts independent continuous production. In the production process, the machine set takes the hot rolled silicon steel coil and the cold and hard silicon steel coil as raw materials to produce and obtain the normalized acid-washed silicon steel coil and the final silicon steel product. The silicon steel normalized pickling coil can be reserved in the production system for standby use, or used for production of other rolling mills in a workshop, or sold as a normalized pickling intermediate product.
At this point, the continuous rolling section is disconnected from the continuous production system, and then the maintenance or fault treatment can be started; after the overhaul or fault treatment is finished, after the steel coil which is coiled on the normalized pickling standby coiling machine 12 is coiled, the strip steel at the outlet of the normalized pickling section can be forwards threaded to the continuous rolling standby welding machine 16 to be connected with the strip steel at the continuous rolling section. Meanwhile, after the steel coil which is being produced on the standby uncoiler at the inlet side of the coating section to be annealed is produced, the strip steel at the outlet of the continuous rolling section is connected with the strip steel at the inlet of the coating section to be annealed at the standby welder 24, and the continuous production state of the whole system is recovered.
For the above accident condition or the maintenance condition, in one embodiment, when the annealing coating section is stopped in a fault or needs to be maintained, the spare slitting shear (i.e. the tandem rolling exit shear 19) at the outlet side of the tandem rolling section cuts off the strip steel, the strip tail of the strip steel in the forward row continues to move forward for a distance D2 to leave the tandem rolling section, the strip head of the strip steel in the backward row moves forward to the spare coiling machine (i.e. the tandem rolling spare coiling machine 20) at the outlet side of the tandem rolling section at the strip threading speed for coiling, and the normalized pickling section and the tandem rolling section continue to produce continuously. Wherein optionally D2 is around 5 m. In the production process, the machine set takes the hot rolled silicon steel coil as a raw material to produce and obtain the cold-hard silicon steel coil. The silicon steel cold-hard coil can be reserved in the production system for standby, or used by other annealing coating units in a workshop or sold as an intermediate product of the cold-hard coil.
At this point, the annealing coating section is disconnected from the continuous production system, and then the maintenance or fault treatment can be started; after the maintenance or fault treatment is finished, after the steel coil which is coiled on the continuous rolling standby coiling machine 20 is coiled, the strip steel at the outlet of the continuous rolling section is connected with the strip steel at the inlet of the annealing coating section at an annealing coating standby welding machine 24, and the continuous production state of the whole system is recovered.
For the above accident state or the maintenance working condition, in one embodiment, when the normalized pickling section and the continuous rolling section both have a fault and are stopped or need to be maintained, the standby slitting shear (the continuous rolling outlet shear 19 or the annealing coating inlet shear 23) on the inlet side of the annealing coating section cuts off the strip steel, the strip steel which moves ahead runs to the annealing coating standby welding machine 24 on the inlet side of the annealing coating section at the tail flicking speed, the standby uncoiler on the inlet side of the annealing coating section uncoils the standby steel coil and leads the strip head to penetrate to the annealing coating standby welding machine 24, and after the corresponding strip tail and the corresponding strip head are welded by the annealing coating standby welding machine 24, the annealing coating section starts to be independently and continuously produced. In the production process, the machine set takes silicon steel cold-hard coils as raw materials to produce and obtain final silicon steel products.
For the above accident state or the maintenance working condition, in one embodiment, when the continuous rolling section and the annealing coating section both have a fault and stop or need to be maintained, the standby slitting shear (i.e. the normalized pickling exit shear 11) on the outlet side of the normalized pickling section cuts off the strip steel, the strip tail of the strip steel which moves forward continues to move forward by a distance D1 to leave the normalized pickling section, the strip head of the strip steel which moves backward moves forward at the strip threading speed to the standby coiler (i.e. the normalized pickling standby coiler 12) on the outlet side of the normalized pickling section for coiling, and the normalized pickling section starts to produce independently and continuously. In the production process, the machine set takes the silicon steel hot rolled coil as a raw material to produce and obtain the silicon steel normalized acid-washed coil; the silicon steel normalized pickling coil can be reserved in the production system for standby use, or can be produced by other rolling mills in a workshop or can be sold as a normalized pickling intermediate product.
For the above accident state or the maintenance working condition, in one embodiment, when the normalized pickling section and the annealed coating section both have a fault and stop or need to be maintained, the standby slitting shear (normalized pickling outlet shear 11 or tandem rolling inlet shear 15) at the inlet side of the tandem rolling section and the standby slitting shear (i.e. tandem rolling outlet shear 19) at the outlet side of the tandem rolling section respectively cut off the strip steel, wherein, at the inlet side of the tandem rolling section, the forward strip steel runs to the tandem rolling standby welder 16 at the inlet side of the tandem rolling section at the tail-flicking speed, the standby uncoiler at the inlet side of the tandem rolling section uncoils the standby strip steel and leads the strip head to the tandem rolling standby welder 16, and the tandem rolling standby welder 16 welds the corresponding strip tail and the corresponding strip head; meanwhile, at the outlet side of the continuous rolling section, the strip tail of the forward strip steel continuously moves forwards for a distance D2 to leave the continuous rolling section, the strip head of the backward strip steel forwards moves to a standby coiling machine (namely, a standby coiling machine 20 for continuous rolling) at the outlet side of the continuous rolling section at a strip threading speed for coiling, and the continuous rolling section starts independent continuous production. In the production process, the machine set takes the normalized acid-washed coil of the silicon steel as a raw material to produce and obtain the cold-hard coil of the silicon steel; the silicon steel chilled coil can be reserved in the production system for standby use, or used by other annealing coating units in a workshop, or sold as an intermediate product of the chilled coil.
As indicated above, the spare uncoiler is loaded with a spare coil of steel which should be able to directly meet the production requirements of the next process stage. Wherein, the spare steel coil on the spare uncoiler at the inlet side of the continuous rolling section is the silicon steel coil after the normalized pickling; and the spare steel coil on the spare uncoiler on the inlet side of the annealing coating section is a silicon steel cold-hard coil with the specified thickness of the rolled product.
In addition, preferably, after a set time, if the continuous production unit still maintains a normal production condition, the spare steel coil is put into the continuous production system for production according to the system disconnection method, and a new spare steel coil is supplemented to ensure the quality of the spare steel coil.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A full continuous production system of non-oriented silicon steel is characterized in that: the strip steel continuous production line comprises a normalizing pickling section, a continuous rolling section and an annealing coating section, wherein the normalizing pickling section, the continuous rolling section and the annealing coating section are sequentially connected and arranged along the running direction of strip steel to form a continuous production unit, and production line breaking mechanisms are arranged between the normalizing pickling section and the continuous rolling section and between the continuous rolling section and the annealing coating section.
2. The full continuous production system of non-oriented silicon steel of claim 1, wherein: the production line disconnecting mechanism comprises a standby slitting shear, a standby coiling device, a standby uncoiling device and a standby welding machine, the standby coiling device is connected with the strip steel outlet of the adjacent last process section, the standby uncoiling device, the standby welding machine and the strip steel inlet of the adjacent next process section are sequentially connected, and the standby slitting shear is arranged at the outlet of the adjacent last process section and/or the inlet of the adjacent next process section.
3. The full continuous production system of non-oriented silicon steel as set forth in claim 1, wherein: the normalized pickling section is provided with a normalized pickling inlet loop and a normalized pickling outlet loop; and/or the annealing coating layer section is provided with an annealing coating inlet loop and an annealing coating outlet loop.
4. The full continuous production system of non-oriented silicon steel as set forth in claim 1, wherein: the continuous rolling section is provided with a continuous rolling inlet loop.
5. A full continuous production method of non-oriented silicon steel, which is implemented based on the full continuous production system of non-oriented silicon steel of any one of claims 1 to 4;
the method comprises the following steps:
under the normal production condition, the upstream incoming coil is sequentially treated by the normalized pickling section, the continuous rolling section and the annealing coating section to obtain a target product;
and when the accident state or the maintenance working condition is met, at least one group of production line disconnecting mechanisms is put into use, the continuous production unit is decomposed into two or three independent sub-units, and at least part of the independent sub-units continue to produce.
6. The method of claim 5, wherein the method comprises:
when the normalized pickling section breaks down and stops or needs to be overhauled, the standby slitting shear on the inlet side of the continuous rolling section cuts off strip steel, the strip steel moves to a continuous rolling standby welding machine on the inlet side of the continuous rolling section at a tail-flicking speed, the standby uncoiler on the inlet side of the continuous rolling section uncoils a standby steel coil and enables a strip head to penetrate to the continuous rolling standby welding machine, and after the corresponding strip tail and the corresponding strip head are welded by the continuous rolling standby welding machine, the continuous rolling section and the annealing coating section continue to produce continuously.
7. The method of claim 5, wherein the method comprises:
when the continuous rolling section breaks down and stops or needs to be overhauled, the spare slitting shear at the outlet side of the normalizing pickling section cuts off the strip steel, the strip tail of the strip steel which moves forwards continues to move forwards for a distance D1 to be away from the normalizing pickling section, the strip head of the strip steel which moves backwards moves forwards at a strip penetrating speed to a spare coiling machine at the outlet side of the normalizing pickling section for coiling, and the normalizing pickling section starts to produce independently and continuously;
and the standby slitting shear at the inlet side of the annealing coating section cuts off the strip steel, the forward strip steel runs to the standby annealing coating welder at the inlet side of the annealing coating section at the tail flicking speed, the standby uncoiler at the inlet side of the annealing coating section uncoils the standby steel coil and enables the strip head to penetrate to the standby annealing coating welder, and after the standby annealing coating welder welds the corresponding strip tail and the corresponding strip head, the independent continuous production of the annealing coating section is started.
8. The method of claim 5, wherein the method comprises
When the annealing coating section breaks down and stops or needs to be overhauled, the spare slitting shear at the outlet side of the continuous rolling section cuts off the strip steel, the strip tail of the strip steel which moves forwards continues to move forwards for a distance D2 to leave the continuous rolling section, the strip head of the strip steel which moves backwards forwards at a strip penetrating speed to a spare coiling machine at the outlet side of the continuous rolling section for coiling, and the normalized pickling section and the continuous rolling section continue to carry out continuous production.
9. The method of claim 5, wherein the method comprises:
when the normalized pickling section and the continuous rolling section are in failure and stop or need to be overhauled, the standby slitting shear at the inlet side of the annealing coating section cuts off the strip steel, the forward strip steel runs to the annealing coating standby welding machine at the inlet side of the annealing coating section at the tail-flicking speed, the standby uncoiler at the inlet side of the annealing coating section uncoils the standby steel coil and enables the strip head to penetrate to the annealing coating standby welding machine, and after the annealing coating standby welding machine welds the corresponding strip tail and the corresponding strip head, the annealing coating section starts independent continuous production;
when the continuous rolling section and the annealing coating section are in failure and stop or need to be overhauled, the standby slitting shear at the outlet side of the normalized pickling section cuts off the strip steel, the strip tail of the strip steel which moves forwards continues to move forwards for a distance D1 to leave the normalized pickling section, the strip head of the strip steel which moves backwards moves forwards at a strip threading speed to a standby coiling machine at the outlet side of the normalized pickling section for coiling, and the normalized pickling section starts to produce independently and continuously;
when the normalized pickling section and the annealing coating section are in failure and stop or need to be overhauled, the standby slitting shears on the inlet side and the outlet side of the continuous rolling section respectively cut off strip steel, wherein on the inlet side of the continuous rolling section, the forward strip steel runs to a standby continuous rolling welding machine on the inlet side of the continuous rolling section at a tail flicking speed, a standby uncoiler on the inlet side of the continuous rolling section uncoils a standby steel coil and enables a strip head to penetrate to the standby continuous rolling welding machine, and the standby continuous rolling welding machine welds a corresponding strip tail and a corresponding strip head; meanwhile, at the outlet side of the continuous rolling section, the strip tail of the forward strip steel continuously moves forwards by a distance D2 to leave the continuous rolling section, the strip head of the backward strip steel moves forwards at a strip penetrating speed to a standby coiling machine at the outlet side of the continuous rolling section for coiling, and the continuous rolling section starts independent continuous production.
10. The method of claim 5, wherein the method comprises:
and a spare steel coil is loaded on the spare uncoiler at the inlet side of the continuous rolling section and/or the spare uncoiler at the inlet side of the annealing coating section, and the spare steel coil is uncoiled and threaded to a waiting position so as to be immediately put into use in an accident state.
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| CN202211335083.0A CN115634929A (en) | 2022-10-28 | 2022-10-28 | Full-continuous production system and method for non-oriented silicon steel |
| PCT/CN2023/086470 WO2024087517A1 (en) | 2022-10-28 | 2023-04-06 | Non-oriented silicon steel full-continuous production system and method |
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| WO2024087517A1 (en) * | 2022-10-28 | 2024-05-02 | 中冶南方工程技术有限公司 | Non-oriented silicon steel full-continuous production system and method |
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| JPH07121410B2 (en) * | 1988-05-19 | 1995-12-25 | 株式会社日立製作所 | Metal strip processing equipment |
| JP2965970B1 (en) * | 1998-07-21 | 1999-10-18 | 川崎重工業株式会社 | Continuous processing line and continuous processing method for steel sheet |
| JP2000063959A (en) * | 1998-08-24 | 2000-02-29 | Nkk Corp | Producing equipment of steel strip excellent in producing efficiency, provided with continuous annealing equipment and electro-galvanizing equipment |
| CN107962074A (en) * | 2017-12-04 | 2018-04-27 | 中冶南方工程技术有限公司 | A kind of stainless steel cold-rolled plate continuous process system and method |
| CN115634929A (en) * | 2022-10-28 | 2023-01-24 | 中冶南方工程技术有限公司 | Full-continuous production system and method for non-oriented silicon steel |
| CN218746575U (en) * | 2022-10-28 | 2023-03-28 | 中冶南方工程技术有限公司 | Full-continuous production system for non-oriented silicon steel |
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| WO2024087517A1 (en) * | 2022-10-28 | 2024-05-02 | 中冶南方工程技术有限公司 | Non-oriented silicon steel full-continuous production system and method |
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