CN109433826A - Medium thin slab continuous casting and rolling unit and its production method - Google Patents
Medium thin slab continuous casting and rolling unit and its production method Download PDFInfo
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- CN109433826A CN109433826A CN201811395644.XA CN201811395644A CN109433826A CN 109433826 A CN109433826 A CN 109433826A CN 201811395644 A CN201811395644 A CN 201811395644A CN 109433826 A CN109433826 A CN 109433826A
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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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/002—Piling, unpiling, unscrambling
Abstract
The present invention relates to a kind of medium thin slab continuous casting and rolling units, including conticaster, roughing mill, intermediate mill, mm finishing mill unit, strip cooling device, flying shear and the coiling machine being successively connected, buffer gear is arranged between roughing mill and intermediate mill and between intermediate mill and mm finishing mill unit, buffer gear includes cutter and pushing-type bunching device.The production method for additionally relating to the medium thin slab continuous casting and rolling unit carries out the selection and switching of production model, including endless rolling production model, a quarter production model, half production model and 3/4ths production models according to equipment operation condition.Using the three-stage arrangement of " roughing mill+intermediate mill+mm finishing mill unit ", production process is easily controllable, reduces mm finishing mill unit load, is conducive to properties of product control.Double buffering section can be improved continuous casting section and roll the flexibility between section, increases the buffer time of accident treatment, greatlys improve the production operation flexibility of whole unit.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, and in particular to a kind of medium thin slab continuous casting and rolling unit and its producer
Method.
Background technique
Thin plate blank continuously casting and continuously rolling technology passes through nearly continuous development in 30 years, experienced single base rolling sequence and semi-endless rolled
Stage has developed to the endless rolling stage at present.Hot-strip endless rolling refers to that conticaster is in a steady stream in a casting cycle
It constantly pours and casts out continuous casting billet, continuous casting billet is divided again after being directly over the master operations such as heating, de-scaling, rolling, section cooling
Volume batches；It in entire production process, is continuously that rolled piece is not cut shearing from continuous casting billet continuous casting to strip bundling, because
Referred to herein as endless rolling.
The more hot-strip Endless Rolling Technology of domestic and international application is Puri spy's ESP technology, unit arrangement master at present
Include: conticaster → tri- rack roughing mills → pendulum is cut → release with sheet piling device/insulation cover → rotating hub cut → induction heating
Furnace → high-pressure water descaler → five rack mm finishing mill units → laminar cooling system → high-speed flying shear → downcoiler.With conventional thin
The advantages of slab continuous casting rolling technique is compared, ESP technique short, compact arrangement of equipment, energy conservation and environmental protection, production cost for process flow
It is low；But some problems are also encountered in actual production, mainly ESP production line rigidity is too strong, especially continuous casting section and rolling
Equipment arrangement between section is very compact, and continuous casting and two processes of steel rolling need height close fit, want to organization management
Ask very high, production chains are poor, once unit breaks down, buffer time is shorter, and accident treatment is difficult.
Summary of the invention
The present embodiments relate to a kind of medium thin slab continuous casting and rolling unit and its production methods, can at least solve existing skill
The segmental defect of art.
The present embodiments relate to a kind of medium thin slab continuous casting and rolling unit, including be successively connected conticaster, roughing mill,
Intermediate mill, mm finishing mill unit, strip cooling device, flying shear and coiling machine, between the roughing mill and the intermediate mill and
Buffer gear is arranged between the intermediate mill and the mm finishing mill unit, the buffer gear includes cutter and pushing-type heap
Pile device.
As one of embodiment, vertical miller there also is provided between the conticaster and the roughing mill.
As one of embodiment, insulation cover is arranged at the two pushing-type bunching devices.
As one of embodiment, between pushing-type bunching device and the intermediate mill described in preceding road and pushing-type described in rear road
Heating device and descaling device are arranged between bunching device and the mm finishing mill unit.
As one of embodiment, the intermediate mill and the mm finishing mill unit are all made of four-high mill, the intermediate mill
Rack number be 2~3, the rack number of the mm finishing mill unit is 4~6.
The embodiment of the present invention further relates to the production method of medium thin slab continuous casting and rolling unit as described above, is transported according to equipment
Market condition carries out the selection and switching of production model, specifically includes:
When equipment fault-free, endless rolling production model is carried out, the continuous casting billet of conticaster output successively passes through the roughing
After machine, the intermediate mill and mm finishing mill unit rolling, carries out cooling, flying shear shearing and batch；
When roughing mill breaks down, a quarter production model is carried out, continuous production is only carried out on conticaster；Before
Road cutter cuts rolled piece, for the rolled piece before the preceding road cutter, the premenstrual offline processing of road pushing-type bunching device, for
Rolled piece after the preceding road cutter, successively carries out subsequent processing；
When intermediate mill breaks down, half production model is carried out, only the company of being formed between conticaster and roughing mill
Continuous production；The rolled piece of corresponding position is cut respectively using twice cutter, for the rolled piece before preceding road cutter, through institute
After stating roughing mill rolling, cutting to length is carried out continuously across preceding road cutter, then pass through the preceding offline processing of road pushing-type bunching device；
For the rolled piece between twice cutter, after carrying out cutting to length continuously across rear road cutter, then pass through rear road pushing-type stacking
The offline processing of device；For the rolled piece after rear road cutter, subsequent processing is successively carried out；
When mm finishing mill unit breaks down, 3/4ths production models are carried out, are only formed between conticaster and intermediate mill
Continuous production；Rolled piece is cut using rear road cutter, for the rolled piece before the rear road cutter, successively through the roughing
After machine, intermediate mill rolling, cutting to length is carried out continuously across rear road cutter, then by under rear road pushing-type bunching device
Line processing, for the rolled piece after the rear road cutter, successively carries out subsequent processing.
As one of embodiment, under the endless rolling production model, the conticaster drawing speed is 4~7m/min,
Continuous casting billet width is 1300~1600mm, and thickness of strand is 70~120mm, and rolled piece is after roughing mill rolling with a thickness of 30
~50mm, rolled piece is after intermediate mill rolling with a thickness of 10~20mm, and finished strip is thick after mm finishing mill unit rolling
Degree is 0.8~4mm.
As one of embodiment, under the endless rolling production model, control roughing inlet temperature is 1150~1200 DEG C,
Rolled in control inlet temperature be 1100~1150 DEG C and in roll finishing temperature be 1030~1080 DEG C, control entry temperature at finishing is
1030~1080 DEG C and finish rolling finishing temperature are 830~880 DEG C, and control coiling temperature is 560~640 DEG C.
As one of embodiment, under the endless rolling production model, controlling the roughing mill reduction ratio is 45~60%,
Unit width draught pressure is 16~18KN/mm；Controlling the intermediate mill total reduction is 55%~80%, and unit width rolls
Pressing pressure is 13~16KN/mm；Controlling the mm finishing mill unit total reduction is 80%~95%, and unit width draught pressure is 7
~18KN/mm.
As one of embodiment, under 3/4ths production model, for the rolled piece after rear road cutter, when its at
When the distance between product strip segment trailer and the flying shear entrance reach given threshold, the flying shear is by the rolled piece of corresponding position
It cuts, the finished strip after the flying shear is batched, and the rolled piece before the flying shear is then hung away using crane.
The embodiment of the present invention at least has the following beneficial effects:
Medium thin slab continuous casting and rolling unit provided by the invention, using three sections of " roughing mill+intermediate mill+mm finishing mill unit "
Formula arrangement, suitable for the medium thin slab of 70~120mm thickness is rolled into thin gauge finished strip.It was produced in endless rolling
Cheng Zhong, the on the one hand good, hot properties of deformation resistance using continuous casting billet plasticity, using roughing mill rapidly to thicker continuous casting billet
Single pass heavy reduction rolling is carried out, slab thin as far as possible can be obtained in the case where meeting bite condition, then in intermediate mill into one
Step is carried out compared with heavy reduction rolling, and it is right to be conducive to finish rolling section to reduce mm finishing mill unit load with the intermediate base for obtaining thin as far as possible
The thickness and Strip Shape Control of thin slab product；On the other hand rolling section is separated, slab and intermediate base is made there are enough recrystallizations
With the various Second Phase Precipitation times, be conducive to properties of product control.
Medium thin slab continuous casting and rolling unit provided by the invention, between roughing mill and intermediate mill and intermediate mill with
Cutter and pushing-type bunching device are arranged between mm finishing mill unit, thus between roughing mill and intermediate mill and intermediate mill
Breeze way is respectively formed between mm finishing mill unit, when accident occurs for rear process, cutter cuts slab or intermediate base, before making
Process disconnects afterwards, then slab or intermediate base are removed rolling line by release and sheet piling device, achievees the purpose that buffering, coordinates production.
Compared with single buffer section, double buffering section can further improve continuous casting section and roll the flexibility between section, especially in mm finishing mill unit
When breaking down, increase the buffer time of accident treatment, to greatly improve the production operation flexibility of whole unit.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram for the medium thin slab continuous casting and rolling unit that the embodiment of the present invention one provides；
Fig. 2 is the process schematic representation of endless rolling production model provided by Embodiment 2 of the present invention；
Fig. 3 is the process schematic representation of a quarter production model provided by Embodiment 2 of the present invention；
Fig. 4 is the process schematic representation of half production model provided by Embodiment 2 of the present invention；
Fig. 5 is the process schematic representation of 3/4ths production model provided by Embodiment 2 of the present invention；
Fig. 6 is the shearing of the rolled piece after the road 3/4ths production models Xia Hou provided by Embodiment 2 of the present invention cutter
Process schematic representation.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
Such as Fig. 1, the embodiment of the present invention provides a kind of medium thin slab continuous casting and rolling unit, including be successively connected conticaster 1,
Roughing mill 3, intermediate mill 9, mm finishing mill unit 10, strip cooling device 11, flying shear 12 and coiling machine 13, the roughing mill 3 and institute
State between intermediate mill 9 and be arranged between the intermediate mill 9 and the mm finishing mill unit 10 buffer gear, the buffering
Mechanism includes cutter 4 and pushing-type bunching device 6.
Wherein, in embodiment below elaboration, for ease of description, (i.e. thickness is not according to the location of rolled piece difference
Together), the rolled piece between conticaster 1 and roughing mill 3 is defined as continuous casting billet 101, by roughing mill 3 and the last rack of intermediate mill 9 it
Between rolled piece be defined as slab 102, the rolled piece between the last rack of intermediate mill 9 and the last rack of mm finishing mill unit 10 is defined as centre
Rolled piece after the last rack of mm finishing mill unit 10 is defined as hot-strip 104 by base 103.
Above-mentioned conticaster 1 is preferably straight circular-arc type continuous casting machine 1, compared with vertical with bending type continuous casting machine, straight circular-arc type continuous casting machine 1
Metallurgical length is longer, and vertical section is conducive to molten steel inclusion floating, improves the cleaning inside degree of continuous casting billet 101, improves plate
102 internal soundness of base can also reduce casting platform height significantly, reduce the bulge deformation of continuous casting billet 101, therefore be more suitable for
With the thicker continuous casting billet 101 of biggish drawing speed casting.
Above-mentioned roughing mill 3 is preferably duo mill, and compared with four-high mill, duo mill work roll diameter is bigger,
Be conducive to smoothly biting for thicker continuous casting billet 101.
It is four-high mill that above-mentioned intermediate mill 9 and mm finishing mill unit 10, which is both preferably, compared with duo mill, four-high mill
Roller diameter it is smaller, and it is more rigid, be conducive to reduce draught pressure, reduce required power, and be conducive to rolling thin gauge strip.
In the present embodiment, the rack number of intermediate mill 9 is 2~3, and the rack number of mm finishing mill unit 10 is 4~6, can satisfy thin rule
The rolling requirements of lattice strip；As further preferred embodiment, using five rack mm finishing mill unit of Stand Mill intermediate mill 9+
10 combination, effect of rolling are preferable.
The cutter of this field routine can be used in above-mentioned cutter 4, and this field can be used in above-mentioned pushing-type bunching device 6
Conventional release and sheet piling device, the specific structure of the two does not repeat herein.
Above-mentioned strip cooling device 11 carries out water cooling for being heat-treated to hot-strip 104 according to the technological requirements
And it is air-cooled, to obtain ideal finished strip microstructure and mechanical property, strip cooling facility for laminar flow can be used, it is specific to tie
Structure is omitted herein.
Above-mentioned flying shear 12 is generally high-speed flying shear 12, for carrying out bundling shearing to hot-strip 104, is wanted with obtaining
The coil of strip weight asked.Above-mentioned coiling machine 13 is preferably downcoiler 13, to hot-strip volume 104 after bundling
It takes；In the present embodiment, include 3 downcoilers 13, only use wherein two during normal production, the strip after bundling is handed over
For batching, another is spare, when wherein a coiling machine 13 breaks down, is switched to spare coiling machine 13 and is batched, with
Ensure continuous production.
Medium thin slab continuous casting and rolling unit provided in this embodiment, using " roughing mill 3+ intermediate mill 9+ mm finishing mill unit 10 "
Three-stage arrangement, suitable for the medium thin slab of 70~120mm thickness is rolled into thin gauge finished strip.In endless rolling
In production process, the on the one hand good, hot properties of deformation resistance using 101 plasticity of continuous casting billet, using roughing mill 3 rapidly to compared with
Thick continuous casting billet 101 carries out single pass heavy reduction rolling, slab 102 thin as far as possible can be obtained in the case where meeting bite condition, so
Afterwards in 9 further progress of intermediate mill compared with heavy reduction rolling, to obtain intermediate base 103 thin as far as possible, to reduce finishing mill
10 loads of group, are conducive to finish rolling section to the thickness and Strip Shape Control of thin slab product；On the other hand rolling section is separated, makes slab
102 and intermediate base 103 have enough recrystallizations and various Second Phase Precipitation times, be conducive to properties of product control.
Medium thin slab continuous casting and rolling unit provided in this embodiment, between roughing mill 3 and intermediate mill 9 and middle milling train
Cutter 4 and pushing-type bunching device 6 are arranged between group 9 and mm finishing mill unit 10, thus between roughing mill 3 and intermediate mill 9
And it is respectively formed breeze way between intermediate mill 9 and mm finishing mill unit 10, when accident occurs for rear process, cutter 4 is by slab
102 or intermediate base 103 cut, disconnect front and back process, then by releasing and sheet piling device removes slab 102 or centre base 103
Rolling line achievees the purpose that buffering, coordinates production.Compared with single buffer section, double buffering section can further improve continuous casting section and rolling
Flexibility between section increases the buffer time of accident treatment especially when mm finishing mill unit 10 breaks down, to greatly mention
The production operation flexibility of high whole unit.
It is further preferred that there also is provided vertical miller 2 between the conticaster 1 and the roughing mill 3 such as Fig. 1, make
101 width of continuous casting billet is adjusted with including: that (1) is accurate；(2) the wedge-shaped base that will be generated during 1 crystallizer on-line width modulation of conticaster
It is rolled into regular normal base, improves recovery rate of iron；(3) improve slab edging tissue, promote edging tissue recrystallization, improve
Edge mechanical property, the side reduced in rough rolling process are split；(4) it can be used as guiding device, be conducive to slab feeding roughing mill 3.It can
See, arrangement vertical miller 2 can effectively improve the performance of unit production efficiency and belt steel product.
It is further preferred that being arranged with insulation cover 5 at the two pushing-type bunching devices 6, which is used for such as Fig. 1
Continuous casting billet 101 is kept the temperature in endless rolling, to reduce temperature drop, reduces energy consumption.
It is further preferred that such as Fig. 1, road institute between pushing-type bunching device 6 and the intermediate mill 9 and afterwards described in preceding road
It states and arranges heating device 7 and descaling device 8 between pushing-type bunching device 6 and the mm finishing mill unit 10.Due to using two sections
Breeze way, slab 102 by leading portion breeze way and intermediate base 103 there may be larger temperature drops after back segment breeze way (about
100 DEG C), by the way that above-mentioned heating device 7 is arranged, quick concurrent heating can be carried out to rolled piece, to roll in meeting or final rolling temperature requirement.It should
Heating device 7 is preferably induction heater, compared with conventional roller hearth type heating furnace, is had using induction heater following excellent
Point: (1) heating efficiency is higher, and electric conversion efficiency is up to 65%~70%；(2) shorter heating time can make rolled piece reach pre-
Set temperature, oxidization burning loss is few, and furnace length is short, takes up little area.Leading portion descaling device 81 is for removing 102 surface tackiness of slab
Once oxidation iron sheet, prevent in iron scale indentation when rolling, which preferably uses rotary descaling mill, right
The removal effect of once oxidation iron sheet is preferable.Back segment descaling device 82 is used to remove the secondary oxidation iron sheet on intermediate 103 surface of base,
Iron scale when finish rolling is prevented to be pressed into；The back segment descaling device 82 preferably uses high-pressure water descaler, to secondary oxidation iron sheet
Removal effect it is preferable.
It is easy-to-understand to, in the present embodiment, in the orientation description of " preceding " and " rear ", " preceding " is referred to close to conticaster 1
Side, along rolled piece traffic direction, front side equipment is located at the side of the close conticaster 1 of rear side equipment.
Embodiment two
The present embodiment mainly carries out the production method of medium thin slab continuous casting and rolling unit provided by above-described embodiment one
Explanation.
Such as Fig. 2-Fig. 6, the production method of the medium thin slab continuous casting and rolling unit includes: to be given birth to according to equipment operation condition
The selection and switching of production mode.It specifically includes:
(1) when equipment fault-free, endless rolling production model is carried out, the continuous casting billet 101 of 1 output of conticaster successively passes through institute
After stating roughing mill 3, the intermediate mill 9 and the rolling of the mm finishing mill unit 10, carries out the cooling, shearing of flying shear 12 and batch.This life
Under production mode, two cutters 4, two pushing-type bunching devices 6 do not put into production, and two insulation covers 5 put into operation, and entire unit carries out
Continuous production.
Specifically, continuous casting billet 101 is cast out as shown in Fig. 2, being poured first by conticaster 1, continuous casting billet 101 is rolled continuously across edger roll
Machine 2 carries out edge rolling and becomes slab 102 after roughing mill 3 carries out heavy reduction rolling, and slab 102 passes through preceding road insulation cover
51 heat preservations remove 102 surface oxidation of slab using leading portion descaling device 81 subsequently into the quick concurrent heating of preceding road heating device 71
Iron sheet, subsequently entering becomes intermediate base 103 after intermediate mill 9 is rolled, and same intermediate base 103 is continuously across rear road insulation cover
52 heat preservations remove intermediate 103 surface oxidation iron of base into the quick concurrent heating of rear road heating device 72, using back segment descaling device 82
Skin subsequently enters after mm finishing mill unit 10 is rolled and obtains hot-strip 104, and then hot-strip 104 is cold continuously across strip
But device 11, high-speed flying shear 12 and downcoiler 13 are successively heat-treated, bundling is sheared and batched.It was produced entirely
Cheng Zhong, continuous casting billet 101, slab 102, intermediate base 103 and hot-strip 104 before high-speed flying shear 12 are all continuously, not have
There is interruption, is configured to endless rolling production.
(2) when roughing mill 3 breaks down, a quarter production model is carried out, continuous production is only carried out on conticaster 1.
Rolled piece is cut using preceding road cutter 41, for the rolled piece before the preceding road cutter 41, premenstrual road pushing-type bunching device 61
Offline processing successively carries out subsequent processing for the rolled piece after the preceding road cutter 41.Under this production model, preceding road shearing
The road Ji41He Qian pushing-type bunching device 61 puts into operation, and preceding road insulation cover 51 does not put into operation, and rear road cutter 42 and rear road push away
Formula bunching device 62 does not put into operation, and rear road insulation cover 52 puts into operation.
Specifically, as shown in figure 3,3 roll of roughing mill is opened, vertical miller 2 and roughing mill 3 do not put into production, simultaneously
Slab 102 is cut using preceding road cutter 41 immediately.Before preceding road cutter 41, it is offline to carry out continuous casting, shearing and slab
Operation, until casting finishes or Failure elimination；After preceding road cutter 41, slab 102 successively heated, de-scaling, in roll,
Heat preservation, de-scaling, finish rolling, cooling, is sheared and is batched at heating, until the part slab 102 is fully completed production.
(3) when intermediate mill 9 breaks down, half production model is carried out, only between conticaster 1 and roughing mill 3
Form continuous production.The rolled piece of corresponding position is cut respectively using twice cutter 4, before preceding road cutter 41
Rolled piece carries out cutting to length continuously across preceding road cutter 41, then pass through preceding road pushing-type stacking after the roughing mill 3 rolling
The offline processing of device 61；For the rolled piece between twice cutter 4, after carrying out cutting to length continuously across rear road cutter 42,
Pass through the offline processing of rear road pushing-type bunching device 62 again；For the rolled piece after rear road cutter 42, subsequent processing is successively carried out.
Under this production model, two cutters 4 and two pushing-type bunching devices 6 put into operation, and two insulation covers 5 do not put into operation, preceding road
Heating device 71 and leading portion descaling device 81 do not put into operation.Specifically, such as Fig. 4,9 roll of intermediate mill is opened, and immediately
Slab 102 and intermediate base 103 are cut respectively using preceding road cutter 41 and rear road cutter 42.
Before preceding road cutter 41, continuous casting, shearing and the offline operation of slab are carried out, until casting finishes or failure disappears
It removes；
Between two cutters 4, the shearing of slab 102 and offline operation are carried out, until the part slab 102 is all removed and rolled
Line；
After rear road cutter 42, intermediate base 103 is successively heated, de-scaling, finish rolling, cooling, shears and batch, directly
Base 103 is fully completed production among to the part.
(4) when mm finishing mill unit 10 breaks down, 3/4ths production models are carried out, only conticaster 1 and intermediate mill 9 it
Between form continuous production.Rolled piece is cut using rear road cutter 42, for the rolled piece before the rear road cutter 42, is successively passed through
After the roughing mill 3, the intermediate mill 9 roll, cutting to length is carried out continuously across rear road cutter 42, then push away by rear road
The offline processing of formula bunching device 62 successively carries out subsequent processing for the rolled piece after the rear road cutter 42.This production model
Under, rear road cutter 42, rear road pushing-type bunching device 62 and preceding road insulation cover 51 put into operation, and preceding road cutter 41, preceding road push away
Formula bunching device 61, rear road insulation cover 52, rear road heating device 72 and back segment descaling device 82 do not put into operation.
Specifically, such as Fig. 5, the roll of mm finishing mill unit 10 is opened, while using rear road cutter 42 by intermediate base 103 immediately
It cuts；
Before rear road cutter 42, carry out continuous casting, rolling on edge, roughing, heat preservation, heating, de-scaling, in roll, shear and intermediate
The offline operation of base 103, until casting finishes or Failure elimination；
After rear road cutter 42, carry out it is cooling, shear and taking-up activities.
It is further preferred that such as Fig. 6, due to there are the finish rolling of part rolled piece and part without finish rolling, at four points
Three production models under, for the rolled piece after rear road cutter 42, there is 103 sections of the intermediate base and finished strip being mutually linked
Section, when its finished strip segment trailer (i.e. one end of the separate coiling machine 13 of the finished strip section, namely 103 Duan Yucheng of intermediate base
Transitional region between product strip section) when reaching given threshold d with the distance between 12 entrance of flying shear, the flying shear 12 will
The rolled piece of corresponding position is cut, and the finished strip after the flying shear 12 is batched, and the rolled piece before the flying shear 12 is then
It is hung away using crane.Preferably, given threshold d is 1~4m, is preferred with control in 3m or so, it is ensured that the completed belt batched
The quality of steel.
It is easy-to-understand to, for above-mentioned a quarter production model, half production model and 3/4ths productions
Mode switches to endless rolling production model after Failure elimination.
Advanced optimize aforementioned production method, under the endless rolling production model, 1 drawing speed of conticaster is 4
~7m/min, 101 width of continuous casting billet are 1300~1600mm, and continuous casting billet 101 rolls with a thickness of 70~120mm through the roughing mill 3
Rolled piece is after system with a thickness of 30~50mm, and rolled piece is after the intermediate mill 9 rolling with a thickness of 10~20mm, through the mm finishing mill unit
Finished strip is after 10 rollings with a thickness of 0.8~4mm.
It is further preferred that control roughing inlet temperature is 1150~1200 DEG C, control under the endless rolling production model
Rolled in system inlet temperature be 1100~1150 DEG C and in roll finishing temperature be 1030~1080 DEG C, control entry temperature at finishing is
1030~1080 DEG C and finish rolling finishing temperature are 830~880 DEG C, and control coiling temperature is 560~640 DEG C.
It is further preferred that controlling 3 reduction ratio of roughing mill is 45~60% under the endless rolling production model,
Unit width draught pressure is 16~18KN/mm；Controlling 9 total reduction of intermediate mill is 55%~80%, unit width
Draught pressure is 13~16KN/mm；Controlling 10 total reduction of mm finishing mill unit is 80%~95%, unit width draught pressure
For 7~18KN/mm.
Under the control of above-mentioned processing parameter, it can get excellent 104 mass of finished product hot-strip, can substitute to table
The not high cold-strip steel of face quality requirement, such as container plate, automobile acid-cleaning plate, container panel and galvanized sheet are realized " with hot generation
It is cold " purpose.
Embodiment three
The present embodiment by produce finished product with a thickness of 0.8mm, width for the hot-rolled carbon steel of 1600mm for, further to above-mentioned
Endless rolling production method in embodiment two is illustrated.
Endless rolling production model is used under trouble-free working condition, carries out continuous production in entire unit, main to wrap
Include following steps: continuous casting, rolling on edge, roughing, heating, de-scaling, in roll, heat, de-scaling, finish rolling, section cooling, shear and batch.
Its main technologic parameters are as follows:
Continuous casting: for continuous casting billet 101 with a thickness of 80mm, 101 width of continuous casting billet is 1600mm, drawing speed 6m/min.
Roughing: 3 reduction ratio of roughing mill is 50%, and slab 102 is after roughing with a thickness of 40mm, unit width draught pressure
17.6KN/mm, 1170~1190 DEG C of roughing inlet temperature.
In roll: 9 total reduction of intermediate mill is 75%, in roll after intermediate base 103 with a thickness of 10mm, unit width rolling pressure
Power be 14.5~15.5KN/mm, in roll inlet temperature be 1120~1140 DEG C, in roll finishing temperature be 1040~1060 DEG C.
Finish rolling: 10 total reduction of mm finishing mill unit is 92%, and hot-strip 104 rolls after finish rolling with a thickness of 0.8mm, unit width
Pressing pressure is 9~17.4KN/mm, and entry temperature at finishing is 1050~1070 DEG C, and finish rolling finishing temperature is 850~870 DEG C.
Batch: coiling temperature is 590~610 DEG C.
It is straight using longitudinal thickness deviation≤22 μm of the finished product carbon steel strip of the 0.8mm thickness of the present embodiment method acquisition
Deviation≤20I is spent, it is wide to convexity deviation C40≤16 μm, it can replace Surface Quality cold-strip steel of less demanding, such as packaging
Boxboard, automobile acid-cleaning plate, container panel and galvanized sheet etc. are realized " with hot Dai Leng ".
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of medium thin slab continuous casting and rolling unit, it is characterised in that: including the conticaster, roughing mill, middle milling train being successively connected
Group, mm finishing mill unit, strip cooling device, flying shear and coiling machine, between the roughing mill and the intermediate mill and it is described in
Buffer gear is arranged between milling train group and the mm finishing mill unit, the buffer gear includes cutter and pushing-type stacking dress
It sets.
2. medium thin slab continuous casting and rolling unit as described in claim 1, it is characterised in that: the conticaster and the roughing mill
Between there also is provided vertical miller.
3. medium thin slab continuous casting and rolling unit as described in claim 1, it is characterised in that: equal at the two pushing-type bunching devices
It is disposed with insulation cover.
4. medium thin slab continuous casting and rolling unit as described in claim 1, it is characterised in that: pushing-type bunching device described in preceding road with
Heating device is arranged between the intermediate mill and between pushing-type bunching device and the mm finishing mill unit described in rear road and is removed
Squama device.
5. medium thin slab continuous casting and rolling unit as described in claim 1, it is characterised in that: the intermediate mill and the finish rolling
Unit is all made of four-high mill, and the rack number of the intermediate mill is 2~3, and the rack number of the mm finishing mill unit is 4~6.
6. the production method of the medium thin slab continuous casting and rolling unit as described in any one of claims 1 to 5, which is characterized in that
The selection and switching that production model is carried out according to equipment operation condition, specifically include:
When equipment fault-free, endless rolling production model is carried out, the continuous casting billet of conticaster output successively passes through the roughing mill, institute
After stating intermediate mill and mm finishing mill unit rolling, carries out cooling, flying shear shearing and batch；
When roughing mill breaks down, a quarter production model is carried out, continuous production is only carried out on conticaster；It is cut using preceding road
Machine is cut to cut rolled piece, for the rolled piece before the preceding road cutter, the premenstrual offline processing of road pushing-type bunching device, for before this
Rolled piece after road cutter successively carries out subsequent processing；
When intermediate mill breaks down, half production model is carried out, is only formed between conticaster and roughing mill continuous raw
It produces；The rolled piece of corresponding position is cut respectively using twice cutter, for the rolled piece before preceding road cutter, through described thick
After mill milling, cutting to length is carried out continuously across preceding road cutter, then pass through the preceding offline processing of road pushing-type bunching device；For
Rolled piece between twice cutter after carrying out cutting to length continuously across rear road cutter, then passes through rear road pushing-type bunching device
Offline processing；For the rolled piece after rear road cutter, subsequent processing is successively carried out；
When mm finishing mill unit breaks down, 3/4ths production models are carried out, are only formed between conticaster and intermediate mill continuous
Production；Rolled piece is cut using rear road cutter, for the rolled piece before the rear road cutter, successively through the roughing mill, institute
After stating intermediate mill rolling, cutting to length is carried out continuously across rear road cutter, then pass through the rear offline place of road pushing-type bunching device
Reason, for the rolled piece after the rear road cutter, successively carries out subsequent processing.
7. production method as claimed in claim 6, it is characterised in that: under the endless rolling production model, the conticaster
Drawing speed is 4~7m/min, and continuous casting billet width is 1300~1600mm, and thickness of strand is 70~120mm, through the roughing
Rolled piece is after machine rolling with a thickness of 30~50mm, and rolled piece is after intermediate mill rolling with a thickness of 10~20mm, through the finish rolling
Finished strip is after unit rolling with a thickness of 0.8~4mm.
8. production method as claimed in claim 6, it is characterised in that: under the endless rolling production model, control roughing enters
Mouthful temperature is 1150~1200 DEG C, rolled in control inlet temperature be 1100~1150 DEG C and in roll finishing temperature be 1030~1080
DEG C, control entry temperature at finishing is 1030~1080 DEG C and finish rolling finishing temperature is 830~880 DEG C, and control coiling temperature is 560
~640 DEG C.
9. production method as claimed in claim 6, it is characterised in that: under the endless rolling production model, control described thick
Rolling mill screwdown rate is 45~60%, and unit width draught pressure is 16~18KN/mm；Controlling the intermediate mill total reduction is
55%~80%, unit width draught pressure is 13~16KN/mm；Control the mm finishing mill unit total reduction be 80%~
95%, unit width draught pressure is 7~18KN/mm.
10. production method as claimed in claim 6, it is characterised in that: under 3/4ths production model, rear road is cut
The rolled piece after machine is cut, it is described when the distance between its finished strip segment trailer and the flying shear entrance reach given threshold
Flying shear cuts the rolled piece of corresponding position, and the finished strip after the flying shear is batched, the rolled piece before the flying shear
Then hung away using crane.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110052495A (en) * | 2019-04-24 | 2019-07-26 | 中冶赛迪工程技术股份有限公司 | A kind of long material endless rolling production line of short route and its milling method |
| CN110899329A (en) * | 2019-10-25 | 2020-03-24 | 邯郸钢铁集团有限责任公司 | Method for producing brake pad back steel based on CSP continuous casting and rolling production line |
| CN111420987A (en) * | 2020-03-24 | 2020-07-17 | 凌源钢铁股份有限公司 | Medium-width strip long-distance continuous rolling method and rolling line |
| CN111872120A (en) * | 2020-07-15 | 2020-11-03 | 燕山大学 | Multi-mode continuous casting and rolling control method for plate strip |
| CN112024595A (en) * | 2020-09-07 | 2020-12-04 | 中冶赛迪工程技术股份有限公司 | Thin strip steel continuous casting and rolling endless rolling method and rolling production line thereof |
| CN112337968A (en) * | 2020-10-29 | 2021-02-09 | 中冶南方工程技术有限公司 | Multifunctional hot-rolled plate strip production unit and production method thereof |
| CN114101325A (en) * | 2021-11-19 | 2022-03-01 | 一重集团大连工程技术有限公司 | Endless rolling accident treatment process and equipment arrangement |
| CN114309072A (en) * | 2021-11-18 | 2022-04-12 | 中冶赛迪工程技术股份有限公司 | Layer type accident handling method and device after plate strip is rolled without head and is put down and cut |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07314106A (en) * | 1994-05-24 | 1995-12-05 | Nippon Steel Corp | Twin roll continuous casting and rolling apparatus and method thereof |
| EP0771596A1 (en) * | 1995-11-03 | 1997-05-07 | Sms Schloemann-Siemag Aktiengesellschaft | Installation for rolling hot strip by continuous or discontinuous rolling |
| CN101848780A (en) * | 2007-08-24 | 2010-09-29 | Sms西马格股份公司 | Method and device for the production of a metal strip by roll casting |
| WO2012045629A2 (en) * | 2010-10-07 | 2012-04-12 | Sms Siemag Ag | Process and apparatus for producing a metal strip by casting and rolling |
| CN106269868A (en) * | 2016-08-24 | 2017-01-04 | 中冶赛迪工程技术股份有限公司 | Long product rolling production line and production technology thereof |
| WO2018082966A1 (en) * | 2016-11-03 | 2018-05-11 | Primetals Technologies Austria GmbH | Combined casting-rolling installation and method for the continuous production of a hot-rolled finished strip |
| CN209334441U (en) * | 2018-11-22 | 2019-09-03 | 中冶南方工程技术有限公司 | Medium thin slab continuous casting and rolling unit |
-
2018
- 2018-11-22 CN CN201811395644.XA patent/CN109433826B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07314106A (en) * | 1994-05-24 | 1995-12-05 | Nippon Steel Corp | Twin roll continuous casting and rolling apparatus and method thereof |
| EP0771596A1 (en) * | 1995-11-03 | 1997-05-07 | Sms Schloemann-Siemag Aktiengesellschaft | Installation for rolling hot strip by continuous or discontinuous rolling |
| CN101848780A (en) * | 2007-08-24 | 2010-09-29 | Sms西马格股份公司 | Method and device for the production of a metal strip by roll casting |
| WO2012045629A2 (en) * | 2010-10-07 | 2012-04-12 | Sms Siemag Ag | Process and apparatus for producing a metal strip by casting and rolling |
| CN106269868A (en) * | 2016-08-24 | 2017-01-04 | 中冶赛迪工程技术股份有限公司 | Long product rolling production line and production technology thereof |
| WO2018082966A1 (en) * | 2016-11-03 | 2018-05-11 | Primetals Technologies Austria GmbH | Combined casting-rolling installation and method for the continuous production of a hot-rolled finished strip |
| CN209334441U (en) * | 2018-11-22 | 2019-09-03 | 中冶南方工程技术有限公司 | Medium thin slab continuous casting and rolling unit |
Non-Patent Citations (1)
| Title |
|---|
| CARLO P PIEMONTE;ALESSANDRO PIGANI;康建国;: "达涅利生产热轧钢卷的薄板坯连铸连轧技术的观点和经验", 世界钢铁, no. 03 * |
Cited By (12)
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|---|---|---|---|---|
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| CN110899329A (en) * | 2019-10-25 | 2020-03-24 | 邯郸钢铁集团有限责任公司 | Method for producing brake pad back steel based on CSP continuous casting and rolling production line |
| CN110899329B (en) * | 2019-10-25 | 2021-08-20 | 邯郸钢铁集团有限责任公司 | Method for producing brake pad back steel based on CSP continuous casting and rolling production line |
| CN111420987A (en) * | 2020-03-24 | 2020-07-17 | 凌源钢铁股份有限公司 | Medium-width strip long-distance continuous rolling method and rolling line |
| CN111872120A (en) * | 2020-07-15 | 2020-11-03 | 燕山大学 | Multi-mode continuous casting and rolling control method for plate strip |
| CN111872120B (en) * | 2020-07-15 | 2021-03-19 | 燕山大学 | Multi-mode continuous casting and rolling control method for plate strip |
| CN112024595A (en) * | 2020-09-07 | 2020-12-04 | 中冶赛迪工程技术股份有限公司 | Thin strip steel continuous casting and rolling endless rolling method and rolling production line thereof |
| CN112024595B (en) * | 2020-09-07 | 2022-03-11 | 中冶赛迪工程技术股份有限公司 | Thin strip steel continuous casting and rolling endless rolling method and rolling production line thereof |
| CN112337968A (en) * | 2020-10-29 | 2021-02-09 | 中冶南方工程技术有限公司 | Multifunctional hot-rolled plate strip production unit and production method thereof |
| CN114309072A (en) * | 2021-11-18 | 2022-04-12 | 中冶赛迪工程技术股份有限公司 | Layer type accident handling method and device after plate strip is rolled without head and is put down and cut |
| CN114309072B (en) * | 2021-11-18 | 2023-11-03 | 中冶赛迪工程技术股份有限公司 | Layered accident handling method and device after endless rolling and lower swinging shearing of plate strip |
| CN114101325A (en) * | 2021-11-19 | 2022-03-01 | 一重集团大连工程技术有限公司 | Endless rolling accident treatment process and equipment arrangement |
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