CN103042055B - Hot-rolled billet steel rough-rolling descaling method - Google Patents
Hot-rolled billet steel rough-rolling descaling method Download PDFInfo
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- CN103042055B CN103042055B CN201210579104.3A CN201210579104A CN103042055B CN 103042055 B CN103042055 B CN 103042055B CN 201210579104 A CN201210579104 A CN 201210579104A CN 103042055 B CN103042055 B CN 103042055B
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Abstract
The invention discloses a hot-rolled billet steel rough-rolling descaling method. The method includes the steps: subjecting heated billet steel to a first-procedure rolling; and subjecting the billet steel to subsequent-procedure rolling after first-procedure rolling is completed. A high-pressure water descaling nozzle is arranged at an outlet of a rough rolling machine to descale billet steel discharged from the outlet of the rough rolling machine. The pressing rate of a flat roll of the rough rolling machine is zero during first-procedure rolling and is not zero during subsequent-procedure rolling.
Description
Technical field
The present invention relates to a kind of hot rolling steel billet roughing descaling method, more particularly, the present invention relates to a kind of hot rolling steel billet roughing descaling method that can improve product surface quality.
Background technology
Generally include multiple operation such as roughing and finish rolling to the hot rolling of steel billet, in rough rolling process, because the temperature of steel billet is higher, its surface oxygen etc. easily and in air reacts and generates iron scale, the so-called firecoat of this iron scale.This firecoat can be pressed in the surface of final products by roll in the process of rolling, thus reduces the surface quality of product.
In order to address this problem, usually need the firecoat removing billet surface before rolling.
In recent years, the method adopting high-pressure water descaling has been developed.The simple mechanism of high-pressure water descaling is as follows: after steel billet is come out of the stove from heating furnace, utilizes the surface of water under high pressure to iron scale to spray, and iron scale surface Partial Rapid-cold, produces very large contraction and stress, thus makes iron scale ftracture and be separated with steel billet.Through the impact of High-Pressure Water, iron scale peels off from billet surface, reaches the object removing iron scale.
CN101618406A Chinese patent application discloses a kind of method for controlling surface chromatic aberration of hot rolling acid-cleaning plate steel, the method is in rough rolling process, with outlet, descaling spray nozzle is set respectively by the entrance at roughing mill, thus in the operation of rolling, every time can be adopted to carry out high-pressure water descaling at roughing mill entrance side, and carry out high-pressure water descaling further by between mm finishing mill unit frame, thus the scenery with hills and waters line aberration of hot rolling acid-cleaning plate belt steel surface can be eliminated, improve the surface quality of product.
But the problem of said method is, be respectively provided with one group of collector before and after roughing rolling, because the angle of installing is different and the difference of band steel traffic direction, these collectors can not form complementation.In addition, conventional de-scaling is carried out in porch owing to have employed, once entrance de-scaling is broken down, in the production process of hot-rolled product, utilize this conventional rolling mill practice, by scale on surface press-in band steel in the first passage operation of rolling, and can cannot destroy the iron scale of press-in at the outlet de-scaling water of the second passage, thus make the firecoat of the first passage press-in be retained in the surface of final products, thus cannot meet the production of great surface quality product.
Summary of the invention
An aspect of of the present present invention provides a kind of hot rolling steel billet roughing descaling method, and the method comprises the steps: that the steel billet after to heating carries out the rolling of the first passage; After carrying out the rolling of the first passage, steel billet is carried out to the rolling of back pass.Wherein, the exit of roughing mill is provided with descaling spray nozzle, to carry out de-scaling to the steel billet leaving roughing mill outlet.Wherein, in the operation of rolling of the first passage, the reduction ratio of the plain-barreled roll of roughing mill is zero, and in the operation of rolling of back pass, the reduction ratio of plain-barreled roll is non-vanishing.
According to a further aspect in the invention, in the operation of rolling of the first passage, de-scaling can not be carried out to steel billet, in the operation of rolling of the back pass after first time, in even-numbered pass, de-scaling can be carried out and rolling to steel billet, in odd-numbered pass, can only be rolled steel billet.
According to a further aspect in the invention, in the even-numbered pass in the back pass after first time, the plain-barreled roll of roughing mill can be depressed, edger roll can be opened, in odd-numbered pass in back pass after first time, the plain-barreled roll of roughing mill can be depressed, and edger roll can be depressed.
According to a further aspect in the invention, in the first passage, the edger roll of roughing mill can be depressed.
Accompanying drawing explanation
By the description to embodiment carried out below in conjunction with accompanying drawing, above-mentioned and/or other objects of the present invention and advantage will become apparent, wherein:
Fig. 1 is the schematic diagram that the principle utilizing high-pressure water descaling is shown;
Fig. 2 is the flow chart of the method for descaling billets by rough rolling according to exemplary embodiment of the present invention.
Detailed description of the invention
Below with reference to accompanying drawings exemplary embodiment of the present invention is described in more detail, but, only these embodiments should be understood with illustrative meaning, and they limitation of the present invention should be interpreted as.There is provided these embodiments to make the disclosure to be thoroughly with complete, and scope of the present invention will be conveyed to those skilled in the art fully.
Fig. 1 is the schematic diagram that the principle utilizing high-pressure water descaling is shown.
With reference to Fig. 1, when the steel billet 110 after heating contacts with air, iron scale 120 can be formed on the surface of steel billet 110.After steel billet 110 leaves heating furnace, because the iron scale 120 on surface cools rapidly, so produce multiple netted crackle 121 due to the contraction of iron scale 120 on the surface of iron scale.When steel billet is through descaling jet (not shown), due to the effect of High-Pressure Water 130 of spraying from descaling jet, make iron scale 120 surface produce Partial Rapid-cold, thus produce larger contraction, the crackle 121 of iron scale 120 is made to become larger, and the warpage of generating portion.Under the percussion of High-Pressure Water 130, the static pressure of the dynamic pressure fluidify of the water under high pressure in crackle 121 and be driven into bottom iron scale 120, make iron scale 120 from steel billet 110 surfacial spalling, to remove iron scale 120, thus realize the object of de-scaling by water under high pressure.
According to one embodiment of present invention, the high-pressure water descaling method described with reference to Fig. 1 can be utilized to carry out de-scaling to steel billet.In one embodiment, first the steel billet after heating is carried out to the rolling of the first passage, then, after the rolling carrying out the first passage, steel billet is carried out to the rolling of back pass.Wherein, the exit of roughing mill is provided with descaling spray nozzle, to carry out de-scaling to the steel billet leaving roughing mill outlet.According to one embodiment of present invention, in the operation of rolling of the first passage, the reduction ratio of the plain-barreled roll of roughing mill is zero, and in the operation of rolling of back pass, the reduction ratio of plain-barreled roll is non-vanishing.But the present invention is not limited thereto, such as, in the operation of rolling of the first passage, can edger roll be utilized to be rolled steel billet.
More particularly, in one embodiment of the invention, in the operation of rolling of the first passage, de-scaling can not carried out to steel billet.In other words, in the operation of rolling of the first passage, neither steel billet is rolled, also de-scaling is not carried out to steel billet, and steel billet is directly passed through from roughing mill.
In the operation of rolling of the back pass after the rolling of the first passage, in even-numbered pass, de-scaling is carried out and rolling to steel billet, in odd-numbered pass, only steel billet is rolled.In an embodiment of the invention, by making steel billet back through roughing mill to realize the rolling of even-numbered pass.In this case, the descaling spray nozzle being arranged on roughing mill exit can be utilized to complete de-scaling to steel billet.
Below with reference to concrete example of the present invention, exemplary embodiment of the present invention is described in more detail.Fig. 2 is the flow chart of the method for descaling billets by rough rolling according to exemplary embodiment of the present invention.
With reference to Fig. 2, the roughing mill being provided with descaling spray nozzle in exit can be utilized to perform according to method for descaling billets by rough rolling of the present invention.After the steel billet after heating enters into roughing mill, steel billet is carried out to the rolling of the first passage, in the operation of rolling of the first passage, the reduction ratio keeping plain-barreled roll is zero, utilizes edger roll to be rolled steel billet simultaneously.
Then, steel billet is carried out to the rolling of the second passage.Wherein, before the rolling of the second passage, de-scaling process is carried out to steel billet.The rolling of the second passage realizes reverses through roughing mill by making steel billet, in this case, the descaling spray nozzle being arranged on roughing mill exit can be utilized to complete de-scaling to steel billet.Then, utilize plain-barreled roll to be rolled (that is, make the reduction ratio of plain-barreled roll non-vanishing) to steel billet, make edger roll open simultaneously.
Next, steel billet is carried out to the rolling of the 3rd passage.Wherein, in the 3rd passage, utilize plain-barreled roll and edger roll to be rolled (that is, make the reduction ratio of plain-barreled roll and edger roll all non-vanishing) to steel billet simultaneously.
Next, steel billet is carried out to the rolling of four-pass.Wherein, before the rolling of four-pass, de-scaling process is carried out to steel billet.The rolling of four-pass realizes reverses through roughing mill by making steel billet, in this case, the descaling spray nozzle being arranged on roughing mill exit can be utilized to complete de-scaling to steel billet.Then, utilize plain-barreled roll to be rolled (that is, make the reduction ratio of plain-barreled roll non-vanishing) to steel billet, make edger roll open simultaneously.
Next, steel billet is carried out to the rolling of the 5th passage.Wherein, in the 5th passage, utilize plain-barreled roll and edger roll to be rolled (that is, make the reduction ratio of plain-barreled roll and edger roll all non-vanishing) to steel billet simultaneously.
Next, steel billet is carried out to the rolling of the 6th passage.Wherein, before the rolling of the 6th passage, de-scaling process is carried out to steel billet.The rolling of the 6th passage realizes reverses through roughing mill by making steel billet, in this case, the descaling spray nozzle being arranged on roughing mill exit can be utilized to complete de-scaling to steel billet.Then, utilize plain-barreled roll to be rolled (that is, make the reduction ratio of plain-barreled roll non-vanishing) to steel billet, make edger roll open simultaneously.
Next, steel billet is carried out to the rolling of the 7th passage.Wherein, in the 7th passage, utilize plain-barreled roll and edger roll to be rolled (that is, make the reduction ratio of plain-barreled roll and edger roll all non-vanishing) to steel billet simultaneously.
Although rough rolling of steel billets phosphorus removing method comprises seven passages shown in figure 2, but the present invention is not limited thereto.According to the performance of steel and the actual conditions of final products, more or less passage can be used be rolled.
According to method for descaling billets by rough rolling of the present invention, outlet de-scaling water can be utilized to be destroyed by the iron scale produced in running before roughing De-scaling box to roughing milling train, thus solve and because having entrance de-scaling to cause roughing plain-barreled roll to be depressed, oxide skin is not pressed in steel billet.Utilize method of the present invention, normally can produce specialities (that is, Surface Quality requires high, the product that de-scaling difficulty is large), surface quality is normal.
Although the exit only at roughing mill in the above embodiment of the present invention is provided with descaling spray nozzle, but the present invention is not limited thereto, it will be appreciated by those skilled in the art that the present invention can be applied in the porch of roughing mill and exit is provided with in the roughing mill of descaling spray nozzle.In this case, when the descaling spray nozzle of the porch of roughing mill damages or cannot open due to other reasons or do not wish to open, can use and carry out descaling of steel stock and rolling according to method of the present invention.
Although describe in detail embodiments of the invention with reference to accompanying drawing, but those skilled in the art are to be understood that, without departing from the spirit and scope of the present invention, can carry out various amendment and change to these methods, scope of the present invention is by claims and equivalents thereof.
Claims (3)
1. a hot rolling steel billet roughing descaling method, the method comprises the steps:
Steel billet after heating is carried out to the rolling of the first passage;
After carrying out the rolling of the first passage, steel billet is carried out to the rolling of back pass,
Wherein, the exit of roughing mill is provided with descaling spray nozzle, to carry out de-scaling to the steel billet leaving roughing mill outlet, and does not carry out de-scaling in the porch of roughing mill,
Wherein, in the operation of rolling of the first passage, the reduction ratio of the plain-barreled roll of roughing mill is zero, and in the operation of rolling of back pass, the reduction ratio of plain-barreled roll is non-vanishing,
Wherein, in the operation of rolling of the first passage, de-scaling is not carried out to steel billet, continue in the rear in the operation of rolling of passage, in even-numbered pass, de-scaling is carried out and rolling to steel billet, in odd-numbered pass, steel billet is only rolled and not de-scaling.
2. hot rolling steel billet roughing descaling method as claimed in claim 1, wherein, in even-numbered pass, the plain-barreled roll pressure of roughing mill, edger roll is opened, and in odd-numbered pass, the plain-barreled roll pressure of roughing mill, edger roll is depressed.
3. hot rolling steel billet roughing descaling method as claimed in claim 1, wherein, in the first passage, the edger roll pressure of roughing mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210579104.3A CN103042055B (en) | 2012-12-27 | 2012-12-27 | Hot-rolled billet steel rough-rolling descaling method |
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| CN201210579104.3A CN103042055B (en) | 2012-12-27 | 2012-12-27 | Hot-rolled billet steel rough-rolling descaling method |
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| CN103042055B true CN103042055B (en) | 2015-06-10 |
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| CN106350735B (en) * | 2016-11-16 | 2018-03-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Think gauge Q450NQR1 steel plates and its roughing method |
| CN111922103B (en) * | 2020-07-10 | 2022-07-15 | 首钢京唐钢铁联合有限责任公司 | Method and device for descaling and cooling rough rolling |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10110324A1 (en) * | 2001-03-03 | 2002-09-05 | Sms Demag Ag | Process for descaling tapes |
| JP2005296973A (en) * | 2004-04-07 | 2005-10-27 | Sumitomo Metal Ind Ltd | Method and apparatus for manufacturing hot-rolled steel plate |
| CN101618406A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | Method for controlling surface chromatic aberration of hot rolling acid-cleaning plate |
| WO2010069574A2 (en) * | 2008-12-18 | 2010-06-24 | Sms Siemag Ag | Method and device for descaling a metal strip |
| CN102247985A (en) * | 2011-07-01 | 2011-11-23 | 河北省首钢迁安钢铁有限责任公司 | Method for producing steel for stirring tank with limit specification through hot rolling |
| CN102671941A (en) * | 2012-06-11 | 2012-09-19 | 南京钢铁股份有限公司 | Process for producing thin gauge pipeline steel by using double-stand medium and heavy plate mill |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201082432Y (en) * | 2007-08-16 | 2008-07-09 | 宝山钢铁股份有限公司 | Big mill scale removal case protecting device |
-
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10110324A1 (en) * | 2001-03-03 | 2002-09-05 | Sms Demag Ag | Process for descaling tapes |
| JP2005296973A (en) * | 2004-04-07 | 2005-10-27 | Sumitomo Metal Ind Ltd | Method and apparatus for manufacturing hot-rolled steel plate |
| CN101618406A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | Method for controlling surface chromatic aberration of hot rolling acid-cleaning plate |
| WO2010069574A2 (en) * | 2008-12-18 | 2010-06-24 | Sms Siemag Ag | Method and device for descaling a metal strip |
| CN102247985A (en) * | 2011-07-01 | 2011-11-23 | 河北省首钢迁安钢铁有限责任公司 | Method for producing steel for stirring tank with limit specification through hot rolling |
| CN102671941A (en) * | 2012-06-11 | 2012-09-19 | 南京钢铁股份有限公司 | Process for producing thin gauge pipeline steel by using double-stand medium and heavy plate mill |
Non-Patent Citations (2)
| Title |
|---|
| 叶何文等.柳钢2032mm热轧板带粗轧机自动化控制系统.《柳钢科技》.2006,(第2期),第38-41页. * |
| 武仁户.可逆粗轧机在梅钢热轧板厂的应用.《梅山科技》.2007,(第3期),第2页左栏第15行-第2页右栏第15行,图3. * |
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