CN102430569A - Device for improving hourly yield of single-chassis medium plate mill and rolling method thereof - Google Patents
Device for improving hourly yield of single-chassis medium plate mill and rolling method thereof Download PDFInfo
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- CN102430569A CN102430569A CN201110358731XA CN201110358731A CN102430569A CN 102430569 A CN102430569 A CN 102430569A CN 201110358731X A CN201110358731X A CN 201110358731XA CN 201110358731 A CN201110358731 A CN 201110358731A CN 102430569 A CN102430569 A CN 102430569A
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Abstract
The invention discloses a device for improving hourly yield of a single-chassis medium plate mill and a rolling method thereof, which are characterized in that the single-chassis mill technology equipment comprises a heating furnace, a descaling box, an intermediate blank temperature-keeping support frame, a rolling mill, a roller way and ACC (steel plate accelerated cooling control device) in sequence; the rolling technology comprises the following steps in sequence: (1) taking a first intermediate blank into the ACC layer to carry out laminar cooling after rolling, cogging a second plate blank in the rolling mill, and discharging a third plate blank; (2) returning a second intermediate blank to the rolling mill and placing the blank on the steel blank temperature-keeping support frame, rolling the first intermediate blank into a finished product, and taking the third blank into the descaling box for descaling; (3) removing a successfully-rolled first steel plate from the rolling mill, putting the second intermediate blank into the roller way and feeding the blank into the ACC through the rolling mill to carry out laminar cooling, cogging the third blank, and discharging a fourth blank. The technical demand on intermediate blank accelerated cooling is satisfied without increasing equipment input; the temperature of the intermediate blank is uniform; the plate form after accelerated cooling is excellent; the plate after returning red satisfies the finish rolling requirements; no abnormal tissues are existent on the surfaces of rolled steel plates; and the hourly yield of the mill is improved to 22 pieces.
Description
Affiliated technical field
The invention belongs to the Iron and Steel Production technology, particularly relate to a kind of device and milling method that improves single chassis jobbing sheet-rolling mill hourly output.
Background technology
In the Iron and Steel Production, generally rolling parameters such as the rolling temperature through each passage in control heating-up temperature, the operation of rolling, drafts, carry out the control of austenitic state, for obtaining tiny accumulation conditions such as phase-change organization in the cooling procedure of back.The key element of austenitic state mainly comprises what of the size of austenite grain size, the height that includes energy, internal flaw etc.Controlled rolling can be divided into following three types: austenite recrystallization controlled rolling (be called not only the controlled rolling of I type), austenite non-recrystallization district's controlled rolling (but also being called the controlled rolling of II type) and (γ+α) two-phase section controlled rolling.
Rolled piece perhaps carries out the alternate manner cooling to rolled piece before milling train or the cooling of moving about of back mill table, side roller-way when treating temperature at present.In the two-shipper frame is arranged, to select the cooling of moving about of intermediate blank roller-way between milling train is needed only the delay table long enough, controlled rolling treats that temperature will not influence the milling train hourly output.General controlled rolling hourly output is about 30.
Single chassis jobbing sheet-rolling mill production controlled rolling steel plate adopts the rolling in batches intermediate blank of carrying out to treat temperature or steel plate is raised out roller-way treat temperature.Output is lower during the controlled rolling of single chassis steel plate, and general controlled rolling hourly output is about 14.
The rolling mill practice flow process of prior art is following:
The 1st slab cogging (roughing), the 2nd slab de-scaling, the 3rd block of slab come out of the stove;
The 1st intermediate blank treated temperature behind milling train, the 2nd slab cogging, and the 3rd slab de-scaling, the 4th block of slab come out of the stove;
The 3rd compact cogging is treated temperature behind the 1st, the 2 intermediate blank milling train, and the 4th slab de-scaling, the 5th block of slab are waited for and being come out of the stove;
The 4th compact cogging, the 1st, 2,3 intermediate blank treated temperature, the 5th block of slab waited for and being come out of the stove;
1st, treat temperature behind 2,3,4 plate slab mills;
2nd, 3,4 blocks of slabs all return the milling train front roller-way and treat temperature, wherein the 4th block of slab are supported to and treat that warm frame treats temperature, the 1st slab finish rolling;
Successively 2,3,4 slab finish rolling are accomplished, the 5th block of slab come out of the stove, and repeats the rolling sequential.
The prior art defective: existing single chassis control is adopted rolling in batches; The intermediate blank time of staying temperature is long; And causing rolling rhythm slow, the milling train hourly output is low, does not make full use of steel plate acceleration cooling system ACC (steel plate accelerated cooling device) accelerated cooling device behind the milling train.Adopt other physics with temperature (like the water pipe water spray), cause the intermediate blank inhomogeneous cooling even, intermediate blank wooden dipper Qu Yanchong.Reducing the intermediate blank time of staying temperature, is the effective way that improves singlestandmill controlled rolling hourly output.
Summary of the invention
The purpose of this invention is to provide a kind of device and milling method that overcomes the raising single chassis jobbing sheet-rolling mill hourly output of above-mentioned prior art weak point.Apparatus of the present invention comprise by treating before the milling train that warm frame, singlestandmill, steel plate acceleration cooling system ACC form; Milling method comprises that intermediate blank treats that the temperature drop temperature accomplishes through ACC, reduces the intermediate blank time of staying temperature, improves singlestandmill controlled rolling hourly output.
Technical scheme of the present invention: a kind of device and milling method ground thereof that improves single chassis jobbing sheet-rolling mill hourly output, singlestandmill process equipment order of placement is followed successively by: heating furnace, De-scaling box, intermediate blank is treated warm support, milling train, roller-way, ACC.
Heating furnace is a walking beam furnace, is divided into preheating section, first bringing-up section, second bringing-up section, soaking zone control heating, and slab is heated to suitable rolling temperature, and the slab requirement temperature of coming out of the stove is even; The inherent roller-way of de-scaling casing respectively disposes three up and down and gets rid of the squama nozzle, and itself and steel slab surface angle are 12～15 °, and the slab of coming out of the stove is water under high pressure removal steel slab surface iron scale through the out-of-date 1800MPa of the ejecting left and right sides; Intermediate blank treats that warm support is hydraulically powered four-bar mechanism, and (support holds up intermediate blank and is supported in the roller-way top during use, and slab also lower roll road slab can be round transported can to hold up intermediate blank; Support is positioned over the roller-way below when not using, and slab is round transported on roller-way); Milling train is the reversing four-high mill that the adhesion type edger roll is arranged, and slab rolling is become the width and the thickness steel plate of requirement; The ACC cooling device is for disposing the accelerated cooling device of laminar flow cooling jet up and down, and steel plate is cooling water flow and roller table speed about out-of-date adjustment, and steel plate is cooled to required technological temperature; The roll line roller-way all is made up of the solid roll of single roller variable frequency regulating speed control, and major function is transportation slab, intermediate blank, steel plate.
Adopt three steel tandem rollings on the production line, its processing step is followed successively by:
(1) first intermediate blank gets into the cooling of ACC laminar flow behind milling train, second block of slab come out of the stove at milling train cogging (roughing), three-lane road base;
(2) second intermediate blank are returned the milling train after-frame and are treated that in steel billet warm frame, first intermediate blank mill product (finish rolling), the 3rd compact advance the De-scaling box de-scaling;
(3) first block plates are rolling successfully to be left milling train, second intermediate blank and puts into roller-way and get into the cooling of ACC laminar flow, the 3rd compact cogging (roughing), the 4th compact through milling train and come out of the stove;
By rolling with the upper type circulation.
Compared with prior art, the present invention has the following advantages: the first, and not increase equipment input satisfies the arts demand that intermediate blank is quickened cooling; The second, after intermediate blank is quickened cooling, the intermediate blank temperature evenly, quicken cooling back intermediate blank template good, return and satisfy the finish rolling requirement after red, roll the back surface of steel plate and abnormal structure do not occur, satisfy the requirement of delivery technical conditions; The 3rd, intermediate blank is quickened cooling back rolling rhythm and is obviously improved, and the milling train hourly output is increased to 22.
Accompanying drawing and explanation
Accompanying drawing is a singlestandmill process equipment layout drawing of the present invention.Among the figure: 1-heating furnace, 2-De-scaling box, 3-intermediate blank is treated warm support, 4-milling train, 5-roller-way, 6-ACC.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment invention is further specified.
Shown in accompanying drawing: singlestandmill process equipment order of placement is followed successively by: heating furnace 1, and De-scaling box 2, intermediate blank is treated warm support 3, milling train 4, roller-way 5, ACC6.
Heating furnace 1 is a walking beam furnace, and slab is heated to suitable rolling temperature, and the slab requirement temperature of coming out of the stove is even; The inherent roller-way of De-scaling box 2 casings respectively disposes three up and down and gets rid of the squama nozzle, and the slab of coming out of the stove is removed the steel slab surface iron scale through the out-of-date water under high pressure that ejects; Intermediate blank treats to hold up intermediate blank by warm support 3, and (support holds up intermediate blank and is supported in the roller-way top during use, and slab also lower roll road slab can be round transported; Support is positioned over the roller-way below when not using, and slab is round transported on roller-way); Width and thickness steel plate that milling train 4 becomes to require with slab rolling; ACC cooling device 6 is an accelerated cooling device, and steel plate is cooling water flow and roller table speed about out-of-date adjustment, and steel plate is cooled to required technological temperature; Roll line roller-way 5 is made up of solid roll, and major function is transportation slab, intermediate blank, steel plate.
Utilize ACC to control intermediate blank template, evenly cooling accurately, improve the output and the quality of milling train controlled rolling steel plate.Adopt three steel tandem rollings on the production line, its processing step is:
(1) first intermediate blank gets into the cooling of ACC laminar flow behind milling train, second block of slab come out of the stove at milling train cogging (roughing), three-lane road base;
(2) second intermediate blank are returned the milling train after-frame and are treated that in steel billet warm frame, first intermediate blank mill product (finish rolling), the 3rd compact advance the De-scaling box de-scaling;
(3) first block plates are rolling successfully to be left milling train, second intermediate blank and puts into roller-way and get into the cooling of ACC laminar flow, the 3rd compact cogging (roughing), the 4th compact through milling train and come out of the stove;
By rolling with the upper type circulation.
Utilize cooling control after rolling equipment to reduce the intermediate blank temperature evenly, fast, return and satisfy the requirement of finish rolling start rolling temperature after red, realize improving the requirement of milling train hourly output; Temperature is 1080 ℃ after the intermediate blank roughing, treats 0.5 ℃/s of warm air cooling speed, is cooled to 850 ℃ of needs 460s (7.67min); The ACC distance of 4 groups of water at interval is 6.4m, intermediate blank length 30m, and intermediate blank comes and goes 72.8s cool time (1.21min), returns red time 2min, i.e. intermediate blank temperature fall time 3.21nin;
Reduce intermediate blank time of staying temperature 4.46min.
Reduce the method for time of staying temperature: utilize the ACC cooling, reduce the intermediate blank temperature, guarantee to return 850～900 ℃ of red temperature.Each technological parameter such as following table:
Intermediate blank is quickened cooling condition with ACC: more than the controlled rolling type personality board thickness 25mm, treat that warm intermediate blank thickness is 2.5～3.5 times of finished product thicknesses, treats more than the warm intermediate blank thickness 60mm.
Claims (1)
1. a device and milling method that improves single chassis jobbing sheet-rolling mill hourly output, it is characterized in that: singlestandmill process equipment order of placement is followed successively by: heating furnace, De-scaling box, intermediate blank is treated warm support, milling train, roller-way, ACC; Its rolling mill practice steps in sequence is:
(1) first intermediate blank gets into the cooling of ACC laminar flow behind milling train, second block of slab come out of the stove at milling train cogging (roughing), three-lane road base;
(2) second intermediate blank are returned the milling train after-frame and are treated that in steel billet warm frame, first intermediate blank mill product (finish rolling), the 3rd compact advance the De-scaling box de-scaling;
(3) first block plates are rolling successfully to be left milling train, second intermediate blank and puts into roller-way and get into the cooling of ACC laminar flow, the 3rd compact cogging (roughing), the 4th compact through milling train and come out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110358731XA CN102430569A (en) | 2011-11-14 | 2011-11-14 | Device for improving hourly yield of single-chassis medium plate mill and rolling method thereof |
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| CN201110358731XA CN102430569A (en) | 2011-11-14 | 2011-11-14 | Device for improving hourly yield of single-chassis medium plate mill and rolling method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106040749A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Rough rolling rhythm control method |
| CN114733907A (en) * | 2022-04-08 | 2022-07-12 | 北京首钢自动化信息技术有限公司 | Warm rolling system and method for hot rolling production line |
| CN115090669A (en) * | 2022-05-07 | 2022-09-23 | 江苏沙钢集团淮钢特钢股份有限公司 | Efficient bar controlled rolling method |
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| JPH11319908A (en) * | 1998-05-21 | 1999-11-24 | Nkk Corp | Device for manufacturing thick steel plate and manufacture of thick steel plate |
| CN1924065A (en) * | 2005-08-31 | 2007-03-07 | 宝山钢铁股份有限公司 | 700MPa grade high ductility low-yield ratio thick steel plate and manufacture method thereof |
| CN101045977A (en) * | 2006-03-27 | 2007-10-03 | 宝山钢铁股份有限公司 | 800 MPa level thick steel plate with high toughness and low yield ratio and its making process |
| CN101298081A (en) * | 2008-06-18 | 2008-11-05 | 南京钢铁股份有限公司 | Single stand four-roller steckel mill cross-connection control rolling technique |
| CN102172830A (en) * | 2011-01-06 | 2011-09-07 | 中冶东方工程技术有限公司 | Compound production line system |
| US20110272116A1 (en) * | 2010-05-10 | 2011-11-10 | Danieli & C. Officine Meccaniche Spa | Method and plant for the production of flat rolled products |
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2011
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11319908A (en) * | 1998-05-21 | 1999-11-24 | Nkk Corp | Device for manufacturing thick steel plate and manufacture of thick steel plate |
| CN1924065A (en) * | 2005-08-31 | 2007-03-07 | 宝山钢铁股份有限公司 | 700MPa grade high ductility low-yield ratio thick steel plate and manufacture method thereof |
| CN101045977A (en) * | 2006-03-27 | 2007-10-03 | 宝山钢铁股份有限公司 | 800 MPa level thick steel plate with high toughness and low yield ratio and its making process |
| CN101298081A (en) * | 2008-06-18 | 2008-11-05 | 南京钢铁股份有限公司 | Single stand four-roller steckel mill cross-connection control rolling technique |
| US20110272116A1 (en) * | 2010-05-10 | 2011-11-10 | Danieli & C. Officine Meccaniche Spa | Method and plant for the production of flat rolled products |
| CN102172830A (en) * | 2011-01-06 | 2011-09-07 | 中冶东方工程技术有限公司 | Compound production line system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106040749A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Rough rolling rhythm control method |
| CN106040749B (en) * | 2016-06-21 | 2018-06-22 | 首钢京唐钢铁联合有限责任公司 | Rough rolling rhythm control method |
| CN114733907A (en) * | 2022-04-08 | 2022-07-12 | 北京首钢自动化信息技术有限公司 | Warm rolling system and method for hot rolling production line |
| CN115090669A (en) * | 2022-05-07 | 2022-09-23 | 江苏沙钢集团淮钢特钢股份有限公司 | Efficient bar controlled rolling method |
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Application publication date: 20120502 |