CN218460455U - Combined production unit for normalized pickling and rolling of silicon steel - Google Patents
Combined production unit for normalized pickling and rolling of silicon steel Download PDFInfo
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- CN218460455U CN218460455U CN202222891416.XU CN202222891416U CN218460455U CN 218460455 U CN218460455 U CN 218460455U CN 202222891416 U CN202222891416 U CN 202222891416U CN 218460455 U CN218460455 U CN 218460455U
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Abstract
The utility model relates to a silicon steel normalizing pickling and rolling combined production unit, which comprises a unit decoiling device, a normalizing device, a pickling section, a continuous rolling section and a unit coiling machine which are sequentially connected and arranged along the running direction of strip steel to form a continuous production unit; a first standby slitting shear, a first standby coiling machine, a first standby uncoiling device and a first standby welding machine are arranged between the pickling section and the continuous rolling section, the first standby coiling machine is connected with a strip steel outlet of the pickling section, the first standby uncoiling device, the first standby welding machine and a strip steel inlet of the continuous rolling section are sequentially connected, and the first standby slitting shear is arranged at the outlet of the pickling section and/or the inlet of the continuous rolling section. The utility model arranges the normalizing device, the pickling section and the continuous rolling section into a continuous production unit, thus reducing the investment cost and the running cost; the continuous production unit can be decomposed into two independent sub-units, and the unit is high in overhauling and maintenance convenience and production process flexibility.
Description
Technical Field
The utility model belongs to the technical field of silicon steel production, concretely relates to rolling joint production unit of silicon steel normalizing pickling.
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 greatly developed through years of production and research, and the technology is mature and stable. The production of hot-rolled coils to cold-rolled coils before annealing of silicon steel is generally carried out as follows:
medium and high grade products: normalizing pickling line → single-stand reversible mill, or normalizing pickling line → pickling tandem mill;
and (3) medium and low grade products: pickling line → single stand reversible mill, or pickling tandem mill.
According to the existing scheme, from the production of hot rolled coils to cold rolled coils, at least 2 machine sets are configured for medium and high grade products, and an intermediate warehouse for 3-4 days is 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 the handling of at least 2 times, has the flow longer, area is great, manufacturing cost is higher scheduling problem.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a silicon steel normalizing pickling rolling combined production unit, which can at least solve part of the defects of the prior art.
The utility model relates to a silicon steel normalizing pickling and rolling combined production unit, which comprises a unit uncoiling device, a normalizing device, a pickling section, a continuous rolling section and a unit coiler, wherein the unit uncoiling device, the normalizing device, the pickling section, the continuous rolling section and the unit coiler are sequentially connected and arranged along the running direction of strip steel to form a continuous production unit; the pickling section with arrange first reserve slitting shear, first reserve coiling machine, first reserve unwinding unit and first reserve welding machine between the continuous rolling section, first reserve coiling machine with the belted steel export of pickling section links up, first reserve unwinding unit first reserve welding machine and the belted steel entry of continuous rolling section links up in proper order, first reserve slitting shear arrange in the export of pickling section and/or the entry of continuous rolling section.
As one embodiment, a second spare slitting shear, a second spare coiler, a second spare uncoiling device and a second spare welding machine are arranged between the normalizing device and the pickling section, the second spare coiler is connected with a strip steel outlet of the normalizing device, the second spare uncoiling device, the second spare welding machine and a strip steel inlet of the pickling section are sequentially connected, and the second spare slitting shear is arranged at an outlet of the normalizing device and/or an inlet of the pickling section.
In one embodiment, the outlet side of the normalizing device is provided with normalizing outlet shears, the inlet side of the pickling section is provided with pickling inlet shears, and the normalizing outlet shears and/or the pickling inlet shears form the second spare slitting shears.
As an embodiment, the second standby uncoiler is in the form of a double uncoiler, and the uncoiling channels of the two standby uncoilers are connected with the second standby welder.
As an embodiment, the outlet side of the pickling section is provided with a pickling outlet shear, the inlet side of the continuous rolling section is provided with a continuous rolling inlet shear, and the pickling outlet shear and/or the continuous rolling inlet shear form the first spare slitting shear.
As an embodiment, the first standby uncoiler is in the form of a double uncoiler, and the uncoiling channels of the two standby uncoilers are connected with the first standby welder.
As one embodiment, the normalizing device is configured with a normalizing inlet loop and a normalizing outlet loop; the pickling section is provided with a pickling inlet loop and a pickling outlet loop; the continuous rolling section is provided with a continuous rolling inlet loop.
As an embodiment, a raw material trim shear is further arranged at the inlet side of the normalizing device.
In one embodiment, a strip surface treatment device is provided between the normalizing device and the pickling section.
The utility model discloses following beneficial effect has at least: the utility model discloses in, arrange normalizing device, pickling section and tandem rolling section and form to the continuous production unit for the hot rolling is rolled up and can be accomplished the hot rolling and roll up the production of cold rolling book on a continuous production line, greatly reduces the cost of labor, practices thrift the mill and takes up an area of, reduces investment cost and running cost, shortens product production cycle, improves product quality. A first standby slitting shear, a first standby coiling machine, a first standby uncoiling device and a first standby welding machine are arranged between the pickling section and the continuous rolling section, the continuous production unit can be decomposed into two independent sub-units, and the overhauling and maintenance convenience and the process flexibility of the production unit can be improved.
Further, a second standby slitting shear, a second standby coiling machine, a second standby uncoiling device and a second standby welding machine are arranged between the normalizing section and the pickling section, the continuous production unit can be decomposed into two or three independent sub-units, and the overhauling and maintenance convenience and the process flexibility of the production unit are higher.
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 diagram of a combined production unit for normalizing, pickling and rolling silicon steel provided by the embodiment of the utility model.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below clearly and completely, and it should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the embodiment of the utility model provides a rolling joint production unit of silicon steel normalizing pickling, the rolling joint production unit of silicon steel normalizing pickling, including unit unwinding unit 1, normalizing device, pickling section 15, continuous rolling section 23 and unit coiling machine 25, unit unwinding unit 1 normalizing device the pickling section 15 the continuous rolling section 23 with unit coiling machine 25 links up in proper order along belted steel traffic direction and arranges the constitution continuous production unit. A first standby slitting shear, a first standby coiling machine 18, a first standby uncoiling device 19 and a first standby welding machine 22 are arranged between the pickling section 15 and the continuous rolling section 23, the first standby coiling machine 18 is connected with a strip steel outlet of the pickling section 15, the first standby uncoiling device 19, the first standby welding machine 22 and a strip steel inlet of the continuous rolling section 23 are sequentially connected, and the first standby slitting shear is arranged at the outlet of the pickling section 15 and/or the inlet of the continuous rolling section 23.
The unit uncoiling device 1 preferably adopts a double uncoiling device and comprises a first raw material uncoiler and a second raw material uncoiler; the unit decoiler 1 also comprises a normalizing inlet welding machine 3, wherein the welding of the belt tail of one raw material decoiler and the belt head of the other raw material decoiler is completed at the normalizing inlet welding machine 3, and the normalizing inlet welding machine 3 can adopt a laser welding machine or an argon arc welding machine and the like.
Further, as shown in fig. 1, a normalizing entrance shear 2 is arranged at the entrance side of the normalizing device, the normalizing entrance shear 2 can shear off the part with unqualified head and tail, and the treated head and tail are welded at a normalizing entrance welder 3.
The normalizing device is used for normalizing the hot-rolled silicon steel raw material to recrystallize a hot-rolled plate structure and coarsen precipitates, and comprises a normalizing furnace 6. Preferably, the normalizing furnace 6 adopts the treatment process of preheating → heating → soaking → cooling, and the strip steel coming out of the normalizing furnace 6 is cooled to be below 80 ℃.
In one embodiment, as shown in fig. 1, a raw material trimming shear 4 is further arranged between the normalizing inlet welding machine 3 and the normalizing furnace 6, so that trimming processing 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 processing effect. The raw material trimming shears 4 can adopt disc shears and the like.
In one embodiment, the normalizing device is provided with a normalizing inlet loop 5 and a normalizing outlet loop 7, when in normal production, the normalizing inlet loop 5 is in a full loop state, the production rhythm of the front and rear processes can be adjusted, the continuous operation of the unit is ensured, and the normalizing outlet loop 7 is in an empty loop state.
Preferably, a strip steel surface treatment device 8 is arranged between the normalizing furnace 6 and the pickling section 15. The strip steel surface treatment device 8 can adopt a shot blasting machine and the like, normalized strip steel enters the shot blasting machine for shot blasting treatment, fine shot particles strike the surface of the strip steel at a high speed, more than 80% of iron scales can be removed, and the rest iron scales become loose due to shot blasting so as to facilitate subsequent acid washing.
In one embodiment, the pickling section 15 adopts an HCl pickling mode, and 3-5 sections of pickling tanks are arranged, wherein 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 15, a deviation correcting facility is preferably arranged inside the pickling tank and used for correcting the deviation of the strip steel inside the pickling tank.
Preferably, the pickling section 15 is provided with a pickling inlet loop 14 and a pickling outlet loop 16, and during normal production, the pickling inlet loop 14 is in a full loop state, so that the production rhythm of the front and rear processes can be adjusted, the continuous operation of the unit is ensured, and the pickling outlet loop 16 is in an empty loop state.
The continuous rolling section 23 includes a continuous rolling mill for continuously rolling a hot rolled strip to a predetermined thickness, for example, a thickness of 1.6mm to 3.5mm to 0.15mm to 0.65mm. The continuous rolling mill can adopt a three-stand or more stand form according to different specifications of raw materials and finished products, and each stand form can be a 6-roll mill or an 18-roll mill, or different combinations of the two, and the like.
In one embodiment, the continuous rolling section 23 is provided with a continuous rolling inlet loop 21, 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 21 is in a full loop state during normal production.
Preferably, a tandem rolling outlet shear 24 is arranged at the outlet side of the tandem rolling section 23, so that the unqualified part of the strip tail can be sheared off.
The normalizing device and the pickling section 15 and the continuous rolling section 23 can be connected through the guide plate table, so that the normal continuous production requirement is met, but the method is not limited to the connection mode of the process sections, and for example, a roller type conveying device is also feasible.
In one embodiment, the first standby unwinding device 19 is in the form of a double unwinding machine, which enables the continuous rolling section 23 to be an independent subunit and still enable continuous production; specifically, the first standby uncoiling device 19 includes a first standby uncoiler and a second standby uncoiler, an uncoiling channel of the first standby uncoiler and an uncoiling channel of the second standby uncoiler are both connected to the first standby welder 22, and preferably one of the uncoiling channels is designed to be collinear with the continuous production unit.
Further preferably, under normal production conditions, the spare steel coil is loaded on the spare uncoiler, so that the spare steel coil can 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 disconnection of the production line can be further improved, and the production reliability is ensured.
Further preferably, as shown in fig. 1, the outlet side of the pickling section 15 is provided with pickling outlet shears 17, the inlet side of the tandem rolling section 23 is provided with tandem rolling inlet shears 20, and the pickling outlet shears 17 and/or the tandem rolling inlet shears 20 constitute the first standby slitting shears. The flexibility and the reliability of the unit production can be effectively improved by arranging the pickling outlet shears 17 and the tandem rolling inlet shears 20, and the specific application mode is described in the subsequent production method.
The combined production unit for normalizing, pickling and rolling silicon steel provided by the embodiment arranges the normalizing device, the pickling section 15 and the continuous rolling section 23 to form a continuous production unit, so that the production from a hot-rolled coil to a cold-rolled coil can be completed on a continuous production line by the 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. A first standby slitting shear, a first standby coiler 18, a first standby uncoiling device 19 and a first standby welding machine 22 are arranged between the pickling section 15 and the continuous rolling section 23, so that a continuous production unit can be decomposed into two independent sub-units, and the overhauling convenience and the process flexibility of the production unit can be improved.
Further preferably, as shown in fig. 1, a second spare slitting shear, a second spare coiler 10, a second spare uncoiling device 11 and a second spare welding machine 13 are arranged between the normalizing device and the pickling section 15, the second spare coiler 10 is connected with the strip steel outlet of the normalizing device, the second spare uncoiling device 11, the second spare welding machine 13 and the strip steel inlet of the pickling section 15 are connected in sequence, and the second spare slitting shear is arranged at the outlet of the normalizing device and/or the inlet of the pickling section 15.
The second backup uncoiling device 11 is a double uncoiler, and the specific structure can refer to the first backup uncoiling device 19, which is not described herein. Likewise, under normal production conditions, the spare steel coil is loaded on the spare uncoiler so as to be immediately put into use in an accident state.
Further preferably, as shown in fig. 1, the outlet side of the normalizing device is provided with a normalizing outlet shear 9, the inlet side of the pickling section 15 is provided with a pickling inlet shear 12, and the normalizing outlet shear 9 and/or the pickling inlet shear 12 constitute the second spare slitting shear. Through setting up normalizing export and cutting 9 and pickling entry and cutting 12, can improve the flexibility and the reliability of unit production effectively, the specific application mode will be mentioned in the production method that follows.
By arranging the second standby slitting shear, the second standby coiler 10, the second standby uncoiling device 11 and the second standby welding machine 13 between the normalizing device and the pickling section 15, the continuous production unit can be decomposed into two independent sub-units (normalizing unit and pickling-continuous rolling unit), the overhauling and maintenance convenience and the process flexibility of the production unit can be further improved, and the production unit can simultaneously meet the production of middle and low grade products. By combining with standby equipment between the pickling section 15 and the continuous rolling section 23, the continuous production unit can be further decomposed into three sub-units, and any one of the normalizing device, the pickling section 15 and the continuous rolling section 23 can be maintained when a fault occurs, so that the operation reliability is high.
The production method of the silicon steel normalizing, pickling and rolling combined production unit roughly comprises the following steps:
under the normal production condition, when high-grade silicon steel products are produced, the upstream hot rolled coil is sequentially treated by the normalizing device, the pickling section 15 and the continuous rolling section 23 to obtain a cold rolled coil, and the cold rolled coil can be sent to the downstream for annealing coating production.
In the case of a unit equipped with a second standby uncoiling device 11, when the medium and low grade silicon steel products which do not need normalization treatment are produced, the upstream hot rolled coil is sent to the second standby uncoiling device 11 to be uncoiled, and is treated by a continuous rolling section 23 to obtain a cold rolled coil, and the cold rolled coil is sent to the downstream for annealing coating production.
When the continuous rolling section 23 is in fault and stops or needs to be overhauled, the pickling outlet scissors 17 cut 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 pickling section 15, the strip head of the strip steel which moves backwards moves forwards to the first standby coiling machine 18 at the strip passing speed for coiling, and the normalizing device and the pickling section 15 form an independent sub-unit to start continuous production; wherein optionally D1 is around 5 m.
When the normalizing device fails and stops or needs to be overhauled, the second standby slitting shear (the normalizing outlet shear 9 or the pickling inlet shear 12) on the inlet side of the pickling section 15 cuts off strip steel, the forward strip steel runs to a second standby welding machine 13 at a tail-flicking speed, the second standby uncoiling device 11 uncoils a standby steel coil and enables a strip head to penetrate to the second standby welding machine 13, and after the second standby welding machine 13 welds a corresponding strip tail and a corresponding strip head, the pickling section 15 and the continuous rolling section 23 form an independent sub-unit to start continuous production.
When the pickling section 15 is in fault and stops or needs to be overhauled, the normalizing outlet shears 9 cut 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 normalizing device, the strip head of the strip steel which moves backwards moves forwards to a second standby coiling machine 10 at a strip passing speed for coiling, and the normalizing device starts independent continuous production; wherein optionally D2 is around 5 m. The standby slitting shear (the pickling outlet shear 17 or the tandem rolling inlet shear 20) on the inlet side of the tandem rolling section 23 cuts off strip steel, the strip steel moving forward runs to a first standby welding machine 22 at a tail-flicking speed, a first standby uncoiling device 19 uncoils a standby steel coil and enables a strip head to penetrate to the first standby welding machine 22, and after the corresponding strip tail and the corresponding strip head are welded by the first standby welding machine 22, the tandem rolling section 23 starts independent continuous production.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A combined production unit for normalizing, pickling and rolling silicon steel is characterized in that: the continuous production line comprises a unit uncoiling device, a normalizing device, an acid washing section, a continuous rolling section and a unit coiler, wherein the unit uncoiling device, the normalizing device, the acid washing section, the continuous rolling section and the unit coiler are sequentially connected and arranged along the running direction of strip steel to form a continuous production unit; the pickling section with it cuts, first reserve coiling machine, first reserve unwinding unit and first reserve welding machine to have arranged between the tandem rolling section first reserve division, first reserve coiling machine with the belted steel export of pickling section links up, first reserve unwinding unit first reserve welding machine and the belted steel entry of tandem rolling section links up in proper order, first reserve division cut arrange in the export of pickling section and/or the entry of tandem rolling section.
2. The silicon steel normalizing, pickling and rolling combined production unit as set forth in claim 1, wherein: the normalizing device with arrange the reserve slitting of second between the pickling section and cut, the reserve coiling machine of second, the reserve unwinding unit of second and the reserve welding machine of second, the reserve coiling machine of second with the belted steel export of normalizing device links up, the reserve unwinding unit of second the reserve welding machine of second and the belted steel entry of pickling section links up in proper order, the reserve slitting of second cut arrange in the export of normalizing device and/or the entry of pickling section.
3. The silicon steel normalizing, pickling and rolling combined production unit as set forth in claim 2, wherein: the exit side of the normalizing device is provided with normalizing outlet scissors, the entrance side of the pickling section is provided with pickling inlet scissors, and the normalizing outlet scissors and/or the pickling inlet scissors form the second standby slitting scissors.
4. The silicon steel normalizing, pickling and rolling combined production unit as set forth in claim 2, wherein: the second standby uncoiling device adopts a double uncoiler form, and uncoiling channels of two standby uncoilers are connected with the second standby welding machine.
5. The silicon steel normalizing, pickling and rolling combined production unit as set forth in claim 1, wherein: and the outlet side of the pickling section is provided with pickling outlet scissors, the inlet side of the continuous rolling section is provided with continuous rolling inlet scissors, and the pickling outlet scissors and/or the continuous rolling inlet scissors form the first standby slitting scissors.
6. The silicon steel normalizing, pickling and rolling combined production unit as set forth in claim 1, wherein: the first standby uncoiling device is in a double-uncoiler form, and uncoiling channels of two standby uncoilers are connected with the first standby welding machine.
7. The silicon steel normalizing, pickling and rolling combined production line of claim 1 or 2, wherein: the normalizing device is provided with a normalizing inlet loop and a normalizing outlet loop; the pickling section is provided with a pickling inlet loop and a pickling outlet loop; the continuous rolling section is provided with a continuous rolling inlet loop.
8. The silicon steel normalizing, pickling and rolling combined production unit as set forth in claim 1 or 2, characterized in that: and a raw material trimming shear is also arranged at the inlet side of the normalizing device.
9. The silicon steel normalizing, pickling and rolling combined production unit as set forth in claim 1 or 2, characterized in that: and a strip steel surface treatment device is arranged between the normalizing device and the pickling section.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222891416.XU CN218460455U (en) | 2022-10-28 | 2022-10-28 | Combined production unit for normalized pickling and rolling of silicon steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222891416.XU CN218460455U (en) | 2022-10-28 | 2022-10-28 | Combined production unit for normalized pickling and rolling of silicon steel |
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| CN218460455U true CN218460455U (en) | 2023-02-10 |
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| CN202222891416.XU Active CN218460455U (en) | 2022-10-28 | 2022-10-28 | Combined production unit for normalized pickling and rolling of silicon steel |
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