CN104399745B - A kind of steekle mill production line configuring roughing mill and method of work thereof - Google Patents
A kind of steekle mill production line configuring roughing mill and method of work thereof Download PDFInfo
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- CN104399745B CN104399745B CN201410653123.5A CN201410653123A CN104399745B CN 104399745 B CN104399745 B CN 104399745B CN 201410653123 A CN201410653123 A CN 201410653123A CN 104399745 B CN104399745 B CN 104399745B
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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
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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
- B21B1/30—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 non-continuous process
- B21B1/32—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
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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
- B21B2001/225—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 by hot-rolling
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Abstract
The invention discloses a kind of steekle mill production line configuring roughing mill and method of work thereof, described production line includes stove district equipment, roughing district equipment, shear zone equipment, steekle mill district equipment and coiling area equipment, and stove district equipment, roughing district equipment, shear zone equipment, steekle mill district equipment and coiling area equipment order from left to right is arranged；Described roughing district equipment includes four roller reversible roughing mills；Steekle mill district equipment includes four roller reversible steekle mills and No. two four roller reversible steekle mills.The present invention is configured with a frame four roller reversible roughing mill in roughing district equipment, and band steel can be made less at the temperature drop of rough rolling step, it is possible to ensure entry temperature at finishing；The present invention is configured with two frame four roller reversible steekle mills at finish rolling district equipment, improve rolling efficiency, it is effectively reduced the reversible passage in finish rolling stage and enters the threading number of times of coiler furnace, making band steel oxidization time in coiler furnace shorten, thus ensure that surface quality and the lumber recovery of band steel.
Description
Technical field
The present invention relates to field of steel metallurgy, be specifically related to a kind of steekle mill production line configuring roughing mill and
Its method of work, is configured by rational equipment and technological process produces the hot rolling that deformation temperature range is narrow
Coil of strip.
Background technology
The design feature of steekle mill production line is to be respectively configured one in the inlet/outlet side of reversing steckel mill
Coiler furnace.It is incubated owing to band steel can enter in coiler furnace in the operation of rolling, thus decreases band steel
Temperature drop, be therefore applicable to the steel grade that rolling deformation temperature range is narrow, such as stainless steel and special steel etc..
Steekle mill production line compared to hot continuous rolling production line have investment relatively save, floor space less, produce and cloth
Put the pattern feature such as flexibly.
Traditional steekle mill production-line arrangement pattern mainly has following four, is respectively as follows:
(1) the steekle mill production line of single chassis layout pattern is four roller reversible stoves of the 1 attached edger roll of frame band
Rolling machine, its product produced is mainly Hot-rolled Middle Plate.
(2) the steekle mill production line of 1+1 layout pattern is four roller reversible roughing of the 1 attached edger roll of frame band
Machine+1 frame four roller reversible steekle mill, it is mainly characterized by producing the hot-rolled steel that deformation temperature range is narrow
Volume, but owing to steekle mill reversible rolling passage is more, i.e. band steel carries out the number of times being incubated in entering coiler furnace
More, the afterbody of band steel can not enter in coiler furnace and be incubated simultaneously, so that belt steel surface produces more
Secondary oxidation iron sheet, and make the relatively big with middle portion temperature difference end to end of band steel, cause its surface quality poor and
Lumber recovery is relatively low.
(3) to be four roller reversibles of the 1 attached edger roll of frame band thick for the steekle mill production line of 1+1+3 layout pattern
Milling train+1 frame four roller reversible steekle mill+3 frame mm finishing mill unit, it is mainly characterized by producing deformation temperature model
Enclose narrow coils of hot-rolled steel, but owing to milling train quantity is more, cause production line length longer and investment is bigger.
(4) the steekle mill production line of Stand Mill tandem layout pattern is Stand Mill four roller reversible steckel rolling
Machine, it is mainly characterized by producing hot-rolled carbon steel coil of strip, and this is due to Stand Mill tandem layout pattern not individually
Configuration roughing and finish rolling region, in order to ensure the maximum muzzle velocity of milling train, make the specified roll torque of milling train
Less.And the drafts of roughing under normal circumstances is relatively big, needs bigger roll torque, therefore result in this
The billeting capacity of layout pattern is more weak, so that roughing passage increases, it is impossible to ensure entry temperature at finishing, no
It is applicable to roll the coil of strip narrow compared with Thin Specs deformation temperature range.
Summary of the invention
For solving the problems referred to above that prior art exists, present invention one to be proposed can beneficially produce deformation
Joining of the coils of hot-rolled steel that temperature range is narrow, surface quality is preferable, lumber recovery is higher, thickness limit is relatively thin
Put steekle mill production line and the method for work thereof of roughing mill.
To achieve these goals, technical scheme is as follows:
A kind of steekle mill production line configuring roughing mill, including stove district equipment, roughing district equipment, shear zone
Equipment, steekle mill district equipment and coiling area equipment, described stove district equipment, roughing district equipment, shear zone
Equipment, steekle mill district equipment and coiling area equipment order from left to right is arranged；
Described stove district equipment includes at least one heating furnace, and sets at feeding end and the discharge end of heating furnace
It is equipped with steel loading machine and extractor；
It is reversible that described roughing district equipment order from left to right arranges high-pressure water descaler, vertical miller, four rollers
Formula roughing mill, steel scrap kickoff mechanism and waste collection stand, the entrance side of four described roller reversible roughing mills and
Outlet side is respectively arranged with before roughing mill manipulator after manipulator and roughing mill；The pressure mode of described vertical miller
For complete hydraulic pressing mode, and there is automatic width control and short stroke control function, in order to control band steel width
Spending and improve nose shape, vertical miller has the effect preventing rolled piece sideslip simultaneously；Four described rollers are reversible
The pressure mode of formula roughing mill is hydraulic pressure+Electro-pressing mode, has Hydraulic AGC, to band simultaneously
The thickness of steel is controlled；
Described shear zone equipment includes that flying shear, the entrance side of described flying shear are provided with and cuts front jig；
Described steekle mill district equipment from left to right order arrange finish rolling descaling mill, entrance coiler furnace, No. one
Four roller reversible steekle mills, No. two four roller reversible steekle mills and outlet coiler furnace, described No. one four
The entrance side of roller reversible steekle mill is provided with steekle mill inlet side-guiding-board, and No. two described four rollers are reversible
The outlet side of formula steekle mill is provided with steekle mill outlet side guide plate, described four roller reversible stove volumes
It is provided with kink between steekle mill between milling train and No. two four roller reversible steekle mills；Described four rollers
The pressure mode of Steckel mill and No. two four roller reversible steekle mills is complete hydraulic pressing mode,
And there is hydraulic AGC system, work roll bending and corresponding plat control system, to band steel
Thickness and plate shape are controlled；
Described coiling area equipment is sequentially set with from left to right under cooling facility for laminar flow and at least one tableland and batches
Machine, the entrance side of described downcoiler is provided with jig on front side of coiling machine.
The method of work of a kind of steekle mill production line configuring roughing mill, comprises the following steps:
A. the qualified slab of zero defect obtained from continuous casting unit is heated by steel loading machine loading heating furnace, goes out
Furnace temperature is 1150～1250 DEG C；
B. the slab after heating is according to rolling rhythm, extractor held out successively by slab, put to furnace delivery table
On, then it is delivered to high-pressure water descaler through roller-way, is removed the iron oxide of slab upper and lower surface by water under high pressure
Skin；
C. the slab after de-scaling carries out the rolling of rough rolling step by vertical miller and four roller reversible roughing mills,
The reversible passage of roughing is 5～7 passages, slab rolling becomes the intermediate blank of 25～34mm, rolls it at every time
Before need to first pass through roughing mill before after manipulator or roughing mill manipulator slab is carried out centering roll line；
If D. rough rolling step produces the useless base of rolling, then pushed away by the steel scrap after being arranged at four roller reversible roughing mills
Go out machine to be pushed on waste collection stand, otherwise processed；Otherwise, E is gone to step；
E. the intermediate blank after roughing is transported to share zone by delay table, first passes through and cuts in front jig general
Between base centering, and make intermediate blank be directed into flying shear smoothly, then remove the irregular head of intermediate blank by flying shear
Portion and afterbody；
F. the intermediate blank after shearing enters steekle mill region, first passes through finish rolling descaling mill and removes upper and lower surface
Secondary oxidation iron sheet, then by four roller reversible steekle mills and No. two four roller reversible steekle mills
Carry out the rolling in finish rolling stage, intermediate blank is rolled into the band steel of required thickness；
G. in the finish rolling stage, first intermediate blank is passed through by under entrance coiler furnace, at four roller reversible stove volumes
Milling train and No. two four roller reversible steekle mills carry out the 1st passes.Strip steel head goes out No. two four rollers can
After inverse formula steekle mill, the pinch roll of outlet side send into outlet coiler furnace and batch, outlet coiler furnace
Spool velocity is Tong Bu with mill speed；When band steel carries out reversible rolling, band steel is sent by the pinch roll of entrance side
Entrance coiler furnace batches, and the spool velocity of same entrance coiler furnace is Tong Bu with mill speed.So,
Carry out the reversible rolling of 3 passages with steel, be rolled down to finished product thickness；
H. the band steel after finish rolling is used suitable cooling system by cooling facility for laminar flow, by band steel by finishing temperature
It is cooled to the coiling temperature of regulation, finally delivers to downcoiler and batch.
Compared with prior art, the method have the advantages that
1, the present invention is configured with a frame four roller reversible roughing mill in roughing district equipment, and its working roll roller footpath is relatively
Greatly, the single pass drafts making rough rolling step is relatively big, has stronger billeting capacity, makes band steel on roughing rank
The temperature drop of section is less, it is possible to ensure entry temperature at finishing；Again owing to being configured with two volumes in finish rolling district equipment
Taking stove, on finish rolling rank, section strip steel can be incubated in coiler furnace, such that it is able to reduce band steel on finish rolling rank
The temperature loss of section；The steekle mill production line of the present invention decreases band steel temperature drop in whole production process,
It is thus advantageous to produce the coils of hot-rolled steel that deformation temperature range is narrow.
2, the present invention is configured with two frame four roller reversible steekle mills in finish rolling district equipment, improves rolling effect
Rate, is effectively reduced the reversible passage in finish rolling stage and enters the threading number of times of coiler furnace, making accident rate subtract
Little, and make band steel oxidization time in coiler furnace shorten, thus ensure that the surface quality of band steel and become a useful person
Rate；
3, the whole rolling cycle shortens, and decreases the temperature loss in the operation of rolling of the band steel, is conducive to producing
The coils of hot-rolled steel that thickness limit is relatively thin.
Accompanying drawing explanation
The present invention only has 1, accompanying drawing, wherein:
Fig. 1 is the process equipment layout drawing of the present invention.
In figure: 1-steel loading machine；2-heating furnace；3-extractor；4-high-pressure water descaler；Manipulator before 5-roughing mill；
6-vertical miller；7-tetra-roller reversible roughing mill；Manipulator after 8-roughing mill；9-steel scrap kickoff mechanism；10-waste product is received
Collection stand；11-cuts front jig；12-flying shear；13-finish rolling descaling mill；14-entrance coiler furnace；15-steekle mill
Inlet side-guiding-board；Number four roller reversible steekle mills of 16-；Kink between 17-steekle mill；No. bis-four rollers of 18-
Steckel mill；19-steekle mill outlet side guide plate；20-exports coiler furnace；21-cooling facility for laminar flow；
Jig on front side of 22-coiling machine；23-downcoiler.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described through.As it is shown in figure 1, a kind of configuration roughing mill
Steekle mill production line, set including stove district equipment, roughing district equipment, shear zone equipment, steekle mill district
Standby and coiling area equipment, described stove district equipment, roughing district equipment, shear zone equipment, steekle mill district set
Standby and coiling area equipment order from left to right is arranged；
Described stove district equipment includes at least one heating furnace 2, and at the feeding end of heating furnace 2 and discharge end
It is provided with steel loading machine 1 and extractor 3；
Order arranges high-pressure water descaler 4 to described roughing district equipment from left to right, vertical miller 6, four roller can
Inverse formula roughing mill 7, steel scrap kickoff mechanism 9 and waste collection stand 10, four described roller reversible roughing mills 7
Entrance side and outlet side be respectively arranged with before roughing mill manipulator 8 after manipulator 5 and roughing mill；Described edger roll rolls
The pressure mode of machine 6 is complete hydraulic pressing mode, and has automatic width control and short stroke control function,
To control strip width and improving nose shape, vertical miller 6 has the effect preventing rolled piece sideslip simultaneously；
The pressure mode of four described roller reversible roughing mills 7 is hydraulic pressure+Electro-pressing mode, has hydraulic thick simultaneously
Degree control system, is controlled the thickness of band steel；
Described shear zone equipment includes flying shear 12, and the entrance side of described flying shear 12 is provided with cuts front jig
11；
Described steekle mill district equipment from left to right order arrange finish rolling descaling mill 13, entrance coiler furnace 14,
16, No. two four roller reversible steekle mills 18 of a number four roller reversible steekle mill and outlet coiler furnace 20,
The entrance side of described four roller reversible steekle mills 16 is provided with steekle mill inlet side-guiding-board 15, institute
The outlet side of No. two four roller reversible steekle mills 18 stated is provided with steekle mill outlet side guide plate 19, described
Four roller reversible steekle mills 16 and No. two four roller reversible steekle mills 18 between be provided with stove volume
Kink 17 between milling train；Described four roller reversible steekle mills 16 and No. two four roller reversible steekle mills
The pressure mode of 18 is complete hydraulic pressing mode, and has hydraulic AGC system, work roll bending
Roller and corresponding plat control system, thickness and plate shape to band steel are controlled；
Described coiling area equipment is sequentially set with cooling facility for laminar flow 21 and at least one tableland last volume from left to right
Taking machine 23, the entrance side of described downcoiler 23 is provided with jig 22 on front side of coiling machine.
The method of work of a kind of steekle mill production line configuring roughing mill, comprises the following steps:
A. the qualified slab of zero defect obtained from continuous casting unit is loaded heating furnace 2 by steel loading machine 1 and adds
Heat, tapping temperature is generally 1150～1250 DEG C；
B. the slab after heating is according to rolling rhythm, extractor 3 held out successively by slab, put to going out furnace roller
On road, then it is delivered to high-pressure water descaler 4 through roller-way, is removed the oxidation of slab upper and lower surface by water under high pressure
Iron sheet；
C. the slab after de-scaling carries out rolling of rough rolling step by vertical miller 6 and four roller reversible roughing mills 7
System, the reversible passage of roughing is 5～7 passages, slab rolling becomes the intermediate blank of 25～34mm, rolls at every time
Before needing before system to first pass through roughing mill, after manipulator 5 or roughing mill, slab is carried out centering roll line by manipulator 8；
If D. rough rolling step produces the useless base of rolling, then pushed away by the steel scrap after being located at four roller reversible roughing mills 7
Go out machine 9 to be pushed on waste collection stand 10, otherwise processed；Otherwise, E is gone to step；
E. the intermediate blank after roughing is transported to share zone by delay table, first passes through and cuts front jig 11
By intermediate blank centering, and make intermediate blank be directed into flying shear 12 smoothly, then remove intermediate blank by flying shear and do not advise
Head then and afterbody；
F. the intermediate blank after shearing enters steekle mill region, first passes through finish rolling descaling mill 13 and removes upper following table
The secondary oxidation iron sheet in face, then by four roller reversible steekle mills 16 and No. two four roller reversible stove volumes
Milling train 18 carries out the rolling in finish rolling stage, and intermediate blank is rolled into the band steel of required thickness；
G. in the finish rolling stage, first intermediate blank is passed through for 14 times by entrance coiler furnace, at 2 frame four roller reversible stoves
Rolling machine carries out the 1st passes.After strip steel head goes out No. two four roller reversible steekle mills 18, by going out
The pinch roll of mouth side is sent into outlet coiler furnace 20 and is batched, the spool velocity of outlet coiler furnace 20 and rolling
Speed sync；When band steel carries out reversible rolling, band steel is sent into entrance coiler furnace 14 by the pinch roll of entrance side
Batching, the spool velocity of same entrance coiler furnace 14 is Tong Bu with mill speed.So, band steel carries out 3
The reversible rolling of passage, is rolled down to finished product thickness；
H. the band steel after finish rolling is used suitable cooling system by cooling facility for laminar flow 21, by band steel by finish to gauge
Temperature is cooled to the coiling temperature of regulation, finally delivers to downcoiler 23 and batches.
Claims (1)
1. the method for work of the steekle mill production line configuring roughing mill, described steekle mill production line, including stove district equipment, roughing district equipment, shear zone equipment, steekle mill district equipment and coiling area equipment, described stove district equipment, roughing district equipment, shear zone equipment, steekle mill district equipment and coiling area equipment order from left to right is arranged；
Described stove district equipment includes at least one heating furnace (2), and feeding end and the discharge end of heating furnace (2) is provided with steel loading machine (1) and extractor (3)；
Described roughing district equipment order from left to right arranges high-pressure water descaler (4), vertical miller (6), four roller reversible roughing mills (7), steel scrap kickoff mechanism (9) and waste collection stand (10), and the entrance side of four described roller reversible roughing mills (7) and outlet side are respectively arranged with before roughing mill manipulator (8) after manipulator (5) and roughing mill；The pressure mode of described vertical miller (6) is complete hydraulic pressing mode, and there is automatic width control and short stroke control function, to control strip width and improving nose shape, vertical miller (6) has the effect preventing rolled piece sideslip simultaneously；The pressure mode of four described roller reversible roughing mills (7) is hydraulic pressure+Electro-pressing mode, has Hydraulic AGC simultaneously, is controlled the thickness of band steel；
Described shear zone equipment includes flying shear (12), and the entrance side of described flying shear (12) is provided with cuts front jig (11)；
Described steekle mill district equipment order from left to right arranges finish rolling descaling mill (13), entrance coiler furnace (14), number four roller reversible steekle mills (16), No. two four roller reversible steekle mills (18) and outlet coiler furnace (20), the entrance side of described four roller reversible steekle mills (16) is provided with steekle mill inlet side-guiding-board (15), the outlet side of No. two described four roller reversible steekle mills (18) is provided with steekle mill outlet side guide plate (19), it is provided with kink between steekle mill (17) between described four roller reversible steekle mills (16) and No. two four roller reversible steekle mills (18)；Described four roller reversible steekle mills (16) and the pressure mode of No. two four roller reversible steekle mills (18) are complete hydraulic pressing mode, and there is hydraulic AGC system, work roll bending and corresponding plat control system, thickness and plate shape to band steel are controlled；
Described coiling area equipment is sequentially set with cooling facility for laminar flow (21) and at least one downcoiler (23) from left to right, and the entrance side of described downcoiler (23) is provided with jig on front side of coiling machine (22)；
It is characterized in that: described method comprises the following steps:
A. the qualified slab of zero defect obtained from continuous casting unit is heated by steel loading machine (1) loading heating furnace (2), and tapping temperature is 1150～1250 DEG C；
B. the slab after heating is according to rolling rhythm, extractor (3) held out successively by slab, put to furnace delivery table, be then delivered to high-pressure water descaler (4) through roller-way, is removed the iron scale of slab upper and lower surface by water under high pressure；
C. the slab after de-scaling carries out the rolling of rough rolling step by vertical miller (6) and four roller reversible roughing mills (7), the reversible passage of roughing is 5～7 passages, slab rolling becomes the intermediate blank of 25～34mm, and before needing to first pass through roughing mill before every time rolls, after manipulator (5) or roughing mill, slab is carried out centering roll line by manipulator (8)；
If D. rough rolling step produces the useless base of rolling, then it is pushed on waste collection stand (10) by the steel scrap kickoff mechanism (9) after being arranged at four roller reversible roughing mills (7), otherwise processed；Otherwise, E is gone to step；
E. the intermediate blank after roughing is transported to share zone by delay table, first pass through and cut front jig (11) by intermediate blank centering, and make intermediate blank be directed into flying shear (12) smoothly, then remove the irregular head of intermediate blank and afterbody by flying shear (12)；
F. the intermediate blank after shearing enters steekle mill region, first pass through finish rolling descaling mill (13) and remove the secondary oxidation iron sheet of upper and lower surface, then carried out the rolling in finish rolling stage by four roller reversible steekle mills (16) and No. two four roller reversible steekle mills (18), intermediate blank is rolled into the band steel of required thickness；
G. in the finish rolling stage, first intermediate blank is passed through by entrance coiler furnace (14) lower section, carries out the 1st passes in four roller reversible steekle mills (16) and No. two four roller reversible steekle mills (18)；After strip steel head goes out No. two four roller reversible steekle mills (18), the pinch roll of outlet side sending into outlet coiler furnace (20) and batch, the spool velocity of outlet coiler furnace (20) is Tong Bu with mill speed；When band steel carries out reversible rolling, band steel is sent into entrance coiler furnace (14) and is batched by the pinch roll of entrance side, and the spool velocity of same entrance coiler furnace (14) is Tong Bu with mill speed；So, band steel carries out the reversible rolling of 3 passages, is rolled down to finished product thickness；
H. the band steel after finish rolling is used suitable cooling system by cooling facility for laminar flow (21), band steel is cooled to by finishing temperature the coiling temperature of regulation, finally delivers to downcoiler (23) and batch.
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