TW201100557A - Process and plant for the discontinuous production of a stainless steel strip from a previously hot-rolled steel strip - Google Patents

Abstract

The invention concerns a plant for producing a stainless steel sheet metal strip, from a previously hot-rolled steel strip, covered with a scale layer, wound into a coil, including at least one so-called main line, exhibiting at least, along the running direction of the strip: a strip unwinder (5), an annealing furnace (6) under oxidising atmosphere, a mechanical cleaning device (7, 8) for breaking and removing the scale layer from the strip, a device (9) for subjecting the strip to chemical pickling, a non-reversible, cold-rolling device (10), including at least three stands, at least one strip winder (11), wherein said plant will be open-ended in particular, with the possibility of improvement for increasing the capabilities thereof, let alone the quality of the produced strips, without putting into question the initial investment of said main line while exhibiting improved performances.

Description

201100557 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a method for pre-rolling a steel strip. Pre-rolling strips are not continuously manufactured. ::: Also relates to a device for the non-continuous manufacture of non-continuous steel sheet metal strips from preheated rolled strips. [Prior Art]

G ❹ In the field of non-recorded steel, it is known that it is used in your box to draw ±丨> hot rolled steel strips for non-continuous manufacturing of non-scale steel strips. f ―The equipment series is the first annealing line and the first pickling line = the “independent equipment” equipment separated by the cold rolling line. Therefore, the tape: the tape is first subjected to the first annealing and the first pickling step on the first line, re-wound, and then carried to the second line to perform the first cold-heart process. Downstream of the μ rolling process, the tape is re-wound and then the coils are required to be transported to perform the final acid fire. In the case of continuous: "kinpass" type surface drying process, such 3^ is ready to produce 2D or 2B ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ Bake metal ^,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ^ There are too many _" between the production lines, and the "semi-integrated" equipment series is also known. The first cold rolling process is associated with the first-person annealing step on the same line, and the mechanical rust removal (tension leveling, pick-up ) and rust removal by chemical pickling. In today's operations and known equipment, the first cold rolling of the hot-strip steel strip is carried out upstream of the first annealing (4). Therefore, this type of equipment allows a low surface quality steel strip to be produced in a single pass or up to three passes at 5 201100557, metal = 彳 = = steel, ie 2" 2 Β surface quality, 1 of the sheet metal is made discontinuous This requires the winding of the steel sheet metal, the handling of the process, followed by the secondary annealing and acid: cattle: during the secondary cold rolling, k, and acid hydrating steps, thus enabling continuous "skin light" 2" surface quality stainless steel or even 2B quality steel in the condition of rolling" surface milking process & However, this type of “semi-integrated ★ 咕 〇 〇 〇 5 5 又 又 又 又 又 又 ' ' 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该Bathing. However, the latter two items of equipment are particularly long due to the first rolling process which increases the operating speed downstream of the dry steel machine, as indicated by the inventors. Finally, the third series of equipment encountered was the so-called "integrated" equipment, in which stainless steel sheet metal was produced from the hot-made belt on a continuous production line. This type of device in particular allows the manufacture of 2]8 quality belts. Therefore, the same continuous line contains a mechanical descaling device (oxide breeze (〇xide Bu (10)) and sand blasting machine), a pickling device (such as a chemical bath), followed by an irreversible first cold rolling device 'final annealing device and final acid The washing device is finally a "skin-rolling" type surface rolling device. Such a production line is disclosed in the document ΕΡ-0.769.333. However, this continuous production line exhibits a defect that the production line is completely blocked if any of its equipment items fails. In addition, the ability of the line to include, in particular, the first portion of the first pickling and first rolling process 201100557 is limited by the second downstream line portion in which the final acid sheet is achieved. The latter portion is not allowed to operate as high as the first portion. Caught. Therefore, this type of continuous device has limited capabilities. SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for manufacturing a discontinuous stainless steel strip that compensates for the above mentioned drawbacks. The goal of the present invention is to provide a view from the point of view of the manufacturing capabilities or the quality of the manufactured belts, which can be improved, especially by gradual investment, without causing doubts about initial investment. A method of non-continuously manufacturing a non-recorded steel strip in an expandable manner and a non-continuous manufacturing of a metal strip without a steel sheet. Another object of the present invention is to provide a method of making a stainless steel foil metal strip and thus an apparatus that allows for high manufacturing capabilities. The other objective of the present invention is to provide a device with reduced space requirements. Other objects and advantages of the present invention will appear in the following description, and the following description is given for illustrative purposes only and not limited thereto. First of all, the present invention relates to a method of making a steel strip at least in one. <Article production, online non-continuous system ==, preheated rolled steel strip covering the rich layer and rolled into a coil, mainly, and the following steps are performed, and the steps are performed in the following order: _in-phase-stage During the at least one of the so-called main first pass processing: on-line - unrolling the coil, 201100557 - subjecting the strip to primary annealing, - subjecting the strip to mechanical clearing / month division to break and erode the rust layer

- subject the belt to the initial + 彳μ I primary-human chemical acid strontium to remove the rust, 'make the 3 hai belt to the first time to meet the 丨剑人 now rolling 1 make a cold forging belt, - the cold The forged belt is rolled into a roll form, - and during at least one second stage, during the second pass of the same so-called main production line or on the production line: in the same operation along the belt to one Different so-called secondary births unroll the cold forged tape roll, and the cold forged tape is subjected to annealing in an oxidizing environment to produce rust on the belt. The weathering zone is subjected to chemical pickling to remove the recording, and the annealed tape is subjected to "skin rolling" type surface cold rolling as appropriate, and the stainless steel foil metal strip is wound. The invention also relates to an apparatus for discontinuously manufacturing a stainless steel thin metal strip from a preheated rolled steel strip covered with a rust layer and wound into a coil, comprising at least one so-called main production line, the at least one so-called main production line The running direction of the belt exhibits at least the following: '- an uncoiler, an annealing furnace in an oxidizing environment, 'a mechanical cleaning device for breaking and eroding the rust layer on the belt, - one for making The belt is subjected to a chemical pickling apparatus, including an irreversible cold rolling of at least three brackets, at least one winder. 201100557 This device in particular allows the implementation of the method according to the invention. Thus, advantageously, the method according to the invention can be carried out using a device comprising a single continuous manufacturing line (i.e. the main line) which can be obtained using a controlled initial investment. In this case, the second stage of the method according to the invention is then carried out during the second pass of the same main production line, the mechanical cleaning device of the main production line is only stopped, and the cold rolling device is opened. These brackets. When it is desired to increase the manufacturing capacity of the equipment, a (possibly two) secondary production line may be provided at the output of the main production line during the second investment phase. In this case, the first step & step of the method is performed on the main production line, and the second stage of the Xiao method is performed on the secondary production line.

field. When the force of the main production line of Hai is greater than the capacity of the secondary production line, two so-called secondary production lines may be provided at the output of the production line, wherein the steps of the second stage are alternated in the two secondary production lines. The task - the implementation. The result will therefore be a device with high manufacturing capabilities. Advantageously, the method may include a defatting step downstream of the first cold rolling step during the first pass of the main line. Accordingly, the apparatus according to the present invention provides that the main production line is equipped with a degreaser located downstream of the irreversible cold rolling apparatus and over the at least one winding machine. Advantageously, this configuration will allow the cold forged strip to be degreased prior to the steps of the second stage 9 201100557. Therefore, it is preferable that the degreaser is provided on the secondary production line, and the degreasing apparatus is more likely to be omitted in the case of the apparatus including two parallel secondary production lines as described in detail above. According to one embodiment of the method, advantageously, the annealing step during the second stage may be a final annealing, and the pickling step during the second stage may be a final pickling, thereby allowing additional A 2D surface quality steel foil metal strip or even a 2B quality belt is produced under the condition of a "skin-light rolling" type surface cold rolling step. According to another embodiment, the annealing step during the second stage may be an intermediate annealing process, wherein the pickling step during the second stage is a final pickling process, and wherein: - in addition, the pickled The belt undergoes a reversible cold rolling step on a separate line in a third stage, and - the reversible strip is subjected to a glow annealing step on a separate line in a fourth stage, followed by a "skin" The cold-rolled surface is cold-rolled, allowing the manufacture of steel sheet metal of BA surface quality. The device according to the invention thus exhibits the following optional features: - the device can consist of a single wire (ie main line): - on the other hand, the device can comprise a secondary production line in addition to the main line, the secondary production line being mainly Show at least the following: along the running direction of the belt, a belt uncoiler, an annealing furnace in an oxidizing environment' - a pickling device using a chemical reagent, - an optional "skin light m-face drying device" And a tape winding machine, - the device can be a high-volume device, which exhibits two parallel so-called secondary production lines at the output of the main production line 10 201100557, - in order to manufacture BA surface quality steel, the device On the one hand, the main production line and the reproducible secondary production line can also exhibit a reversible cold-rolled individual line comprising a first winder/unwinder, a reversible rolling such as the Sendzimir type. Device, a second winder/unwinder; and, on the other hand, an independent glow annealing line, the independent glow annealing line including an uncoiler, a winding direction along the running direction of the belt It includes a reduction in the annealing furnace under the environment of the device, an alternative of the "skin pass" type, and a cold-rolling apparatus winder. The invention will be better understood when the following description is read in conjunction with the accompanying drawings. [Embodiment] Accordingly, the present invention relates to a device for discontinuously manufacturing a non-recorded steel strip metal strip from a preheated rolled steel strip covered with a recorded layer and wound into a coil, comprising at least one so-called main production line! . The main line exhibits at least the following along the running direction of the belt:

- uncoiler 5, - an annealing furnace 6 in a rolling environment, a mechanical removal device for breaking and rusting the rust layer 7 - used to subject the belt to chemical pickling to remove residual The scale device 9, the irreversible cold rolling device, the bean cover, the three brackets, in particular, two, four or five, at least one belt unwinder 11.

In addition, as shown in Fig. 5, AI AI ^ ^ 13 ", this line can provide: shearing machine and bucket connection between the winding machine 5 and the tie lever 13 as early as 7L 17. Provided in pickling 201100557 sets another accumulator μ between the 9 and the irreversible rolling device, and another accumulator 15 upstream of the winder 1 1 (followed by the shearing machine 18). According to a preferred embodiment, The main production line exhibits a degreaser 12 downstream of the S-month irreversible cold rolling mill and upstream of the at least one winder u. When all steps of the first stage are carried out, the main production line is "hot" The abbreviation HAPR1 of the annealing pickling and rolling line is shown in the figure. The sighing situation can consist of a single production line (i.e. the main production line), in particular according to the method illustrated in Figure 1, which will allow the manufacture of 2D or 2B f| quality steel strips. Alternatively, the apparatus may include a secondary production line 2 in addition to the main line, as illustrated in Figure 5, which indicates that the secondary production line 2 exhibits at least the following in the direction of operation of the belt: - an uncoiler 1 9, Annealing furnace 20 in an oxidizing environment, • a pickling device using a chemical reagent 2 1,

An optional "skin-rolling" type surface cold rolling device 23' - a tape winding machine 22. In addition, 'the secondary production line as illustrated on FIG. 5 can show the shearing machine 28 and the welding unit 29 downstream of the uncoiler B, the belt accumulator 25' upstream of the annealing furnace, and the pickling device using the chemical reagent. 21 and another accumulator 26 between the skin pass rolling device 23. The other accumulator can be provided between the "skin rolling" type surface cold rolling device and the winder 22. In the main production line and the second production line, 12 201100557 chemical reagent pickling device 9 and 21 bath. It can be known to those skilled in the art that the mechanical cleaning device 7 for breaking and eroding the recording layer on the belt can be etched under the traction breeze under traction. The sand blasting machine 8 is then formed. The apparatus can be a high throughput device, as illustrated on Figure 5, which exhibits two parallel so-called secondary lines at the output of the main production line. Note these two

The secondary line does not have a degreasing unit, so the degreasing step is performed on the main line using the degreaser 12. Finally, according to one specific example, which is not described in detail, in addition to the main production line 1 and possibly the secondary production line 2, the apparatus can also exhibit a reversible cold-rolling independent production line 3, which comprises a first winding machine / Unwinder, - a "Senjimir" type reversible rolling mill known to those skilled in the art, and a second winder/unwinder. On the other hand, the apparatus can exhibit an independent glow annealing line 4, which includes an uncoiler, a glow annealing device including a furnace in a reducing environment, along the running direction of the belt, An optional "skin-light rolling" type cold rolling device and a winder. Different forms of glow annealing devices are known to those skilled in the art and are only briefly described. It is formed by a furnace in a non-oxidizing (reducing) environment, followed by a cooling section in which a cooled and non-oxidizing gas is blown over the tropics. This annealing device allows the belt to be annealed without destroying the surface state obtained by the reversible rolling step on the "Senjimir type rolling mill. 13 201100557 The apparatus according to the invention in particular allows the implementation of the method according to the invention. A method for non-continuously mounting & stainless steel strips on at least one line, wherein the preheated rolled strip HRC (hot rolled coil) is covered with a recorded layer 'rolled into a coil' and is primarily subjected to the following steps 'these steps In the following sequence: during the first phase of the at least one so-called main production line 1 during the first phase: - unrolling the coil, - subjecting the strip to the first annealing, f subjecting the strip to mechanical descaling to break And eroding the rust layer, _ the belt is subjected to the first chemical pickling to remove the rust, and the belt is subjected to the first cold rolling to produce the CRC of the cold forged belt (the cold rolling line is heard twice in the same running direction along the belt) On the production line 2, the cold forged strip is wound into a coil form, and during at least one second stage, during the same so-called main production line or a different so-called second pass process: Expand the tape roll by cold forging, anneal, the strip so as to produce _ subjected to an oxidizing environment by the cold forging of the belt

- Winding a stainless steel sheet metal strip.

14 201100557 The degreasing step downstream of the first cold rolling step can be demonstrated during the first pass. Advantageously, the second stage of the step can be carried out on the main line 1 in particular according to the method according to the invention illustrated in Fig. 1, or even according to the method of the invention illustrated in Fig. 2. The method embodiment of FIG. 1 is a method in which the annealing step during the second stage is a final annealing process and the pickling step during the second stage of the method is a final pickling process, thereby allowing the strip to additionally undergo "skin light" 2D surface quality steel foil metal strip or even 2B quality belt is produced under the condition of rolling cold rolling step. Thus, a "skin tempering" device can be provided at the end of the main production line or even at the stage following the main production line. The edge method is still mainly carried out by the main production line, which realizes the first stage step represented by the abbreviation HAPRL of "Thermal annealing pickling line" in Fig. 1 during the first pass processing, and the second pass processing The first stage of the step shown in Figure 1 with the abbreviation CAPL of "Cold Annealing Pickling Line" is implemented. To do this, during the second pass of the process, only the mechanical cleaning devices 7, 8 are stopped and the holder of the reversible cold rolling device 1 is opened. The "skin-rolling" type surface cold rolling step is indicated by the abbreviated SPM of "Skin Light Rolling Mill". The embodiment of Figure 2 differs from the embodiment of the Figure in that it allows the manufacture of steel strips having excellent BA surface qualities. In addition to the main production line 1, the equipment also includes an independent reversible rolling line represented by "Senjimir" and a glow annealing line represented by the abbreviation "Gladding Annealing Line". Provided in order

^ Λ Λ 九 九 九 九 九 九 九 九 九 S S S S S S S S S S S S S S S S S S S S S S S S S S S The main line i according to the embodiment of Fig. 2 allows the implementation of the steps of the first and second stages according to the invention, as previously described with respect to the embodiment of Fig. i. At the end of the second stage of the step, a 2D quality steel strip is produced which is wound and then conveyed to the reversible rolling line 3. On the trailing-strip line, the strip is continuously subjected to several reversible cold rolling steps m in its two running directions, allowing an excellent surface condition to be obtained. The tape is then wound and then transferred to an independent glow annealing line 4 where it is annealed by a glow surface. Finally, the strip thus annealed is subjected to a surface rolling step, thereby allowing a BA quality stainless steel strip to be obtained. According to another embodiment illustrated in detail in Figures 3 and 4, the second stage step can be performed on the second, line 2 different from the main line as described above, so that the method allows for high manufacturing capabilities. Thus, the embodiment of Fig. 3 will be described in which the hot milk strip is first processed on the main line i to be subjected to the first stage of the method represented by the abbreviation HAPRL. The cold forged sheet metal strip is then transported to the secondary production line 2, where the sheet metal strip is subjected to the second stage of the second stage indicated by the abbreviation CApL, which can be performed at the end of the line or even successive stages. In the case of "skin-rolling", the result of this line is the result of $2D or even a quality steel strip. According to one embodiment illustrated in FIG. 5, advantageously, the method can be performed on the line of two secondary production lines exhibiting two parallel secondary junctions, which are allowed to alternately The strip then processes the cold forged sheet metal strip from the 16th 201100557 stage on the other strip. The difference between the embodiment of FIG. 4 and the embodiment of FIG. 3 is that, in addition to the main production line i and the secondary production line 2, the device also exhibits an independent reversible cold rolling line 3 represented by the abbreviation ZR of "Senjimir", followed by "Hui The surface annealing line, abbreviated as BAL, is an independent glow annealing line. In this case, the steel strip at the end of the second stage of the process can be wound and subjected to reversible rolling on the reversible rolling line 3, then re-wound and transported to the independent glow annealing Q line. "Skin tempering" can be performed at the end of the glow annealing line or on successive stages, allowing the manufacture of BA surface quality steel. Of course, other specific examples are contemplated without departing from the framework of the invention as defined by the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a method according to the present invention, which can be implemented by a single so-called main line to produce a 2D or 2B surface quality steel; FIG. 2 is a first embodiment according to the present invention. A schematic diagram of a method in which the first stage and the second stage of the method are carried out by means of a main production line, wherein the apparatus exhibits an independent reversible dairy line and an independent glow annealing line, followed by "skin temper rolling" This allows the manufacture of improved surface quality steel strips. Figure 3 is a view of a method according to the present invention according to a third embodiment of the present invention, which is carried out by a secondary production line comprising a main production line allowing the steps of the first stage and a step of allowing the second stage to be performed to manufacture 2 〇 or 2B quality steel belt. Figure 4 is a view of a method according to the present invention, according to a fourth embodiment of the invention, in which the main production line for the steps of the first stage and the secondary production line for the second stage are implemented. And a reversible rolling independent production line' and an independent glow annealing line, followed by a "skin tempering" to implement 'allowing the manufacture of BA surface quality steel sheet metal strip. Figure 5 shows an apparatus having a main production line and two secondary production lines at the output of the main production line, the two secondary production lines being parallel, thereby allowing alternately between the two secondary production lines - 15 and then the other The cold-forged sheet metal strip from the first stage is processed. [Main component symbol description] 1 : Main line 2 : Secondary line 3 : Cold rolled independent line 4 : Annealing line 5 · Uncoiler 6 : Annealing furnace 7 : Mechanical cleaning device / traction 8 : Mechanical cleaning device / sand blasting machine 9 : pickling device 10 : cold rolling device 11 : tape winding machine 12 : degreaser 13 : accumulator 141 accumulator 18 201100557 15 : accumulator 1 6 : shearing machine 1 7 : welding unit 1 8 : shearing machine 1 9 : Unwinder 20 : Annealing Furnace 2 1 : Pickling device 22 : Winding machine 23 : "Skin-light rolling" type surface cold rolling device 25 : Accumulator 26 : Accumulator 28 : Shearing machine 29 : Welding unit 2B : Quality steel belt / quality belt 2D: quality steel belt / surface quality steel metal belt BA: improved surface quality steel sheet metal strip / excellent surface quality / surface quality steel BAL: glow surface annealing line CAPL: cold annealing pickling line CRC: Cold Rolled Wire Roll HAPRL: Thermal Annealing Pickling and Rolling Line HRC: Hot Rolling Line Roll SPM: Skin Light Rolling Mill ZR: Sendzimir 19

Claims (1)

201100557 VII. Scope of application for patents·· 1 · A method for non-continuously manufacturing Xiugang ▼ on at least one production line in a facility' characterized by covering a rust layer and rolling it into a coil preheated rolled steel strip (HRC) Mainly subjected to the following steps and the steps are performed in the following sequence: during the first phase, during a first pass of the at least one so-called main production line (i): unrolling the coil, subjecting the strip to first annealing, Subjecting the mechanical cleaning to breaking and eroding the rust layer, subjecting the belt to the first chemical pickling to remove the rust, causing the 4 belts to be first cold-rolled by burning, to produce a cold forged belt (), which will The cold forged belt is wound into a roll form, and during at least one second stage, in the same running direction along the belt, the same so-called main production line (1) or even a different so-called secondary production line ( 2) during a second pass of the process: unwinding the cold forged tape, subjecting the cold forged strip to annealing in an oxidizing environment, producing rust on the strip, subjecting the annealed strip to Chemical pickling to remove rust, the annealed tape is optionally subjected to a "skin pass" type surface cold rolling, and the stainless steel foil metal strip is wound. 2. The method of claim 1, wherein the first step of the process is 20 201100557. Degreasing downstream of the first cold rolling step of β Hai 3. Steps such as the patent of the nail are performed on the main production line (1). π < Wanfa, where the shoulder two stages The method in which the first execution is performed. The method in which the first execution is performed. 4. If the application of patent scope 1 is in the secondary production line (2) 5. If the application scope is the second item, etc. in the secondary production line (2) 6 · If the patent application scope is item 4 (2) The steps provided in the main production line (J) are alternately performed on the two. The method of the two stages of the two stages, wherein the two secondary production lines are rounded out, and wherein the second-order secondary production line (2) _ is one of the methods, wherein the output of the two secondary production lines, And wherein any one of the second-order secondary production lines (2) is alternately performed on the two of the steps of the main production line segment as in the fifth (2) of the patent application. 8. The method of any one of clauses i to 7 wherein the annealing step during the second stage is a final annealing process, and the pickling step during the second stage is - the final acid The washing process allows a 2D crucible to be produced under the condition that the 5 kel belt is subjected to a "skin pass" type surface cold rolling step. # Surface mouth negative steel sheet metal strip or even a 2 Β quality belt. 9. The annealing step during the second stage of any one of claims 1 to 7 is an intermediate annealing process 21 201100557. The pickling step during the second stage is a final acid. a washing process, and wherein: the pickled tape is further subjected to a reversible cold milk step on a separate production line (3) in a third stage, and the reversible rolling strip is in another independent stage in a fourth stage The production line (4) is subjected to a glow annealing step followed by a "skin pass" type surface cold rolling to allow the manufacture of a BA surface quality steel sheet metal strip. 10. An apparatus for discontinuously manufacturing a stainless steel sheet metal strip from a preheated rolled steel strip covered with a rust layer and wound into a coil, comprising at least one δ stomach main production line (1), the at least one so-called The main production line (1) exhibits at least the following in the direction of travel of the belt: an uncoiler (5), an annealing furnace (6) in an oxidizing environment, one for breaking and invading the rust layer on the belt Mechanical cleaning device (7, 8), a device (9) for subjecting the belt to chemical pickling, an irreversible cold rolling device (1) comprising at least three supports, at least one winding machine (11) . 11. The apparatus of claim 1 wherein the main production line (1) is equipped with a degreaser located downstream of the irreversible cold rolling device (10) and the at least one winding machine (1 1 ) Upstream. 12. If the equipment of claim 1 or 11 of the patent application is applied, it is formed by a single production line, i.e., the main production line (1). 1 3 · If the equipment of the scope of claim 1 or 11 is applied, it includes a secondary production line (2) in addition to the 22 201100557 main production line (1), and the secondary line (2) along the belt The running direction mainly shows at least the following items: an uncoiler (1 9 ), an annealing furnace (20) in an oxidizing environment, a pickling device (2 1 ) using a chemical reagent, and an optional "skin" A skin pass type surface cooling device (23), a tape winding machine (22). 〇 14 _ For example, the equipment of Article 13 of the scope of the patent application, at the output of the main production line (1), presents two parallel so-called secondary production lines (2). 15. If the equipment of the scope of claim 10 or 11 is applied, in addition to the main production line (1) and possibly the secondary production line (2), on the one hand, a reversible cold-rolling independent production line (3) is presented. The reversible cold rolling independent production line (3) comprises a first winder/unwinder, a reversible rolling device such as the Sendzimir type, a second winder/unwinder, and the like On the one hand, an independent glow annealing line (4) is displayed, and the independent glow annealing line (4) comprises an uncoiler, a glow annealing device comprising a furnace in a reducing environment, in the running direction of the belt, An optional "skin pass" type cold rolling device and a winder. 16. The equipment of claim 12, in addition to the main production line (1) and possibly the secondary production line (2), on the one hand, exhibits a reversible cold-rolling independent production line (3), the reversible cold rolling Independent production line (3) package 3 first winder 7 uncoiler, a special rolling mill such as the Sendzimir type, a second winder/unwinder, and on the other hand 23 201100557 The present invention is an independent glow annealing production line (4). The independent glow annealing production line (4) comprises an uncoiler along the running direction of the belt, a glow annealing device comprising a furnace in a reducing environment, and a Optional "skin pass" type cold rolling unit and a winder. 17. The apparatus of claim 13 which, in addition to the main production line (1) and possibly the secondary production line (2), exhibits a reversible cold-rolling independent production line (3) on the one hand, the reversible cold rolling The independent production line (3) comprises a winding machine/unwinder, a reversible rolling device such as the Sendzimir type, a second winder/unwinder, and on the other hand an independent A surface annealing production line (4), the independent glow annealing line (4) includes an uncoiler along the running direction of the belt, a glow annealing device including a furnace in a reducing environment, and an optional A skin pass type cold rolling device and a winder. 1 8 _If the equipment of claim 14 of the patent scope, in addition to the main production line (1) and possibly the secondary production line (2), on the one hand, a reversible cold-rolling independent production line (3) is presented, which is reversible The cold-rolled independent production line (3) comprises a first winder/unwinder, a reversible rolling device such as the Sendzimir type, a second winder/unwinder, and on the other hand Independent glow annealing production line (4), the independent glow annealing production line (4) belt has a hoisting machine, a glazing annealing device containing a furnace in a reducing environment...optional "skin" A "skin pass" type cold rolling device and a winder. twenty four