CN101590488B - Rolling technical skill of hot strip rough rolling process - Google Patents
Rolling technical skill of hot strip rough rolling process Download PDFInfo
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- CN101590488B CN101590488B CN2008100697551A CN200810069755A CN101590488B CN 101590488 B CN101590488 B CN 101590488B CN 2008100697551 A CN2008100697551 A CN 2008100697551A CN 200810069755 A CN200810069755 A CN 200810069755A CN 101590488 B CN101590488 B CN 101590488B
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- hot strip
- roughing
- rough rolling
- strip
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- 238000005096 rolling process Methods 0.000 title claims abstract description 86
- 230000002441 reversible effect Effects 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 238000009749 continuous casting Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000010079 rubber tapping Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 2
- 238000005520 cutting process Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000002427 irreversible effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The invention belongs to the forming technical field, in particular relates to the novel rolling technical skill of the rough rolling process of a conventional hot strip rolling process (conventional hot strip rolling process). The rolling technical skill comprises the steps that after a continuous casting sheet billet is heated by a heating furnace to a prescribed tapping temperature, the iron scale of the casting sheet billet is removed, the casting sheet billet then enters a rough rolling mill set which is serially arranged by two reversing rolling mills for reverse rolling, an interim billet with certain thickness is rolled and is made into a hot strip with the thickness of a finished product after heat preservation, head and tail cutting and regenerated iron scale removing, and the finished hot strip enters a recoiler to be recoiled after the finished hot strip is cooled. The invention has the advantages of high production possibility of the rough rolling mill set, short rolling line length of a rough rolling area, little temperature fall of the sheet billet in the rough rolling area, and the like. The rolling technical skill of the hot strip rough rolling process can be used for the construction of a new or reformed hot strip rolling mill.
Description
Technical field
The invention belongs to field shaping technique, particularly a kind of Bar Rolling Process of novel conventional hot continuous rolling machine band steel production technology (Conventional hot strip rolling process) roughing operation.
Background technology
Conventional hot continuous rolling machine band steel production technology is meant with thickness 135～250mm slab (with cold charge or hot charging mode) bar plate heating stove of packing into and heats, then is rolled into the traditional processing technology of strip product by roughing unit and mm finishing mill unit.
Conventional hot continuous rolling machine band steel production technology is divided from the rolling mill practice of roughing unit, and semi continuous rolling mill practice, full technique for continuous rolling and these 3 kinds of patterns of 3/4 technique for continuous rolling are arranged at present, and the mm finishing mill unit of these 3 kinds of rolling mill practices is irreversible continuous rolling.
The semi continuous rolling mill practice is meant that the roughing unit is reversible or irreversible discontinuous rolling; Full technique for continuous rolling is meant that roughing mill is irreversible continuous rolling; 3/4 technique for continuous rolling is meant that the roughing unit is reversible or irreversible rolling and to have the operation of half at least be irreversible continuous rolling.
Progress along with device fabrication, electrical control level, newly-built conventional hot continuous rolling machine output strip line mostly adopts the semi continuous rolling mill practice now, this technology is compared with full technique for continuous rolling and 3/4 technique for continuous rolling, has advantages such as shorter, the middle made-up belt more uniform temperature of roughing district rolling line length.
The roughing operation of present existing semi continuous rolling mill practice is formed mode by following 3 kinds, calculate and practical operation situation from theory, under the identical situation of rolling condition, roughing district rolling line length, roughing mill production capacity, the temperature drop of slab in the roughing district are the trend that progressively increases under following 3 kinds of composition modes:
(1) roughing operation is made up of 1 stand reversible roughing mill, and slab is through single chassis roughing mill reversible rolling 3～7 passages, be rolled into certain thickness in the middle of made-up belt, it is rolling to enter mm finishing mill unit then;
(2) roughing operation is made up of 2 roughing mills arranged apart, wherein No. 1 roughing mill is a non-reversing mill, and No. 2 roughing mills are reversible mill, and slab is total to rolling 4～8 passages through 2 roughing mills respectively, be rolled into certain thickness in the middle of made-up belt, it is rolling to enter mm finishing mill unit then;
(3) roughing operation is made up of 2 reversing roughers arranged apart, and slab is respectively through 2 roughing mills reversible rolling 4～8 passages altogether, be rolled into certain thickness in the middle of made-up belt, it is rolling to enter mm finishing mill unit then.
Although after conventional hot continuous rolling machine band steel production technology adopted the semi continuous rolling mill practice, the rolling line length in roughing district shortened significantly, middle made-up belt temperature homogeneity also is improved, and rolling pass is many, and the roughing district temperature drop of made-up belt is big.The length that how further to shorten the roughing district with minimizing equipment and factory building investment, reduce made-up belt roughing district temperature drop with energy savings, be the problem that presses for solution always.
Summary of the invention
The objective of the invention is to propose a kind of Bar Rolling Process of hot-continuous-rolling strip steel production technology roughing operation.Rolling pass of the present invention is few, and the roughing district temperature drop of made-up belt is little, the technological process compactness, and flow process is short, production efficiency is high, and reduced investment can be widely used in the continuous-rolling strip steel production.
This Bar Rolling Process is after continuous casting steel billet is heated to the tapping temperature of regulation through heating furnace, remove iron scale, enter then by two stand reversible rolling mill tandems and arrange that the roughing unit of forming carries out reversible rolling, be rolled into certain thickness intermediate blank through insulation, crop end, remove the regenerating oxidation iron sheet after, be rolled into the hot-strip of finished product thickness through mm finishing mill unit, after the cooling of finished product hot-strip, enter coiling machine and batch rolling.
This technology adopts the thick continuous casting steel billet of 135～250mm, after being heated to 1100 ℃～1250 ℃, heating furnace comes out of the stove, then by behind the high-pressure water descaling, enter by two stand reversible roughing mill tandems and arrange that the roughing unit of forming carries out reversible rolling 3～5 passages, be rolled into certain thickness intermediate blank, behind stay-warm case (or Coil Box) insulation, flying shear crop end, high-pressure water descaling, be rolled into the hot-strip of finished product thickness via the mm finishing mill unit of 5～7 rolling mills composition, hot-strip enters coiling machine and batches rolling after the cooling of band steel cooling device.
Because this Bar Rolling Process roughing unit has adopted the mode of being arranged by two stand reversible rolling mill tandems, this equipment is formed pattern and is promptly had 1 stand reversible roughing mill rolling line length weak point, slab is in the few characteristics of roughing district temperature drop, it is big to have 2 reversing rougher roughing production capacity arranged apart again, rolling pass is distributed flexible characteristic, therefore can improve the production capacity (mode of being made up of 1 stand reversible roughing mill than the roughing operation improves roughing unit production capacity more than 30%) of roughing unit significantly, shorten roughing district rolling line length (mode of being made up of 2 reversing roughers arranged apart than the roughing operation shortens more than the rolling line length 50m) significantly, reduce the temperature drop (mode than roughing operation 2 arranged apart reversing roughers be made of reduce slab temperature drop 20 ℃ or more) of slab in the roughing district.
The Bar Rolling Process of novel conventional hot continuous rolling machine band steel production technology roughing operation has the technological process compactness among the present invention, and flow process is short, production efficiency is high, plurality of advantages such as reduced investment.
Description of drawings
Fig. 1 is that rolling line equipment of the present invention constitutes the vertical section schematic diagram
Fig. 2 is that rolling line equipment of the present invention constitutes floor map
Among the figure: part 1 is for adding (all) hot stoves, part 2 is roughing high-pressure water descaling case, part 3 is a No.1 tandem reversible four-high rougher, and part 4 is a No.2 tandem reversible four-high rougher, and part 5 is a stay-warm case, part 6 is a Coil Box, part 7 is a flying shear, and part 8 is finish rolling high-pressure water descaling case, and part 9 is a mm finishing mill unit, part 10 is band steel cooling device, and part 11 is a coiling machine.
The specific embodiment
With reference to accompanying drawing, concrete enforcement of the present invention is described further:
Thickness is that the continuous casting steel billet of 135～250mm is after adding (all) hot stoves 1 and being heated to the tapping temperature of regulation, enter roughing high-pressure water descaling case 2 by roller-way and remove iron scale, enter then by No.1 tandem reversible four-high rougher 3 and 4 two tandems of No.2 tandem reversible four-high rougher and arrange that the roughing unit of forming carries out reversible rolling 3～5 passages, (30～60mm) intermediate blank is through stay-warm case 5 or Coil Box 6 insulations to be rolled into certain thickness, flying shear 7 crop ends, after finish rolling high-pressure water descaling case 8 is removed the regenerating oxidation iron sheet, be rolled into the hot-strip of finished product thickness via the mm finishing mill unit 9 of 5～7 non-reversing mills compositions, band steel after rolling enters coiling machine 11 and batches rolling after band steel cooling device 10 is cooled to the target coiling temperature.
The rolling mill practice of this hot-strip roughing operation and method can apply to the construction of the hot strip rolling mill of newly-built or transformation.
Claims (1)
1. the Bar Rolling Process of a hot-strip roughing operation, it is characterized in that: thickness is that the continuous casting steel billet of 135～250mm is after heating furnace is heated to 1100 ℃～1250 ℃, remove iron scale, enter then by two stand reversible rolling mill tandems and arrange that the roughing unit of forming carries out reversible rolling 3～5 passages, be rolled into the thick intermediate blank of 30～60mm through insulation, crop end, remove the regenerating oxidation iron sheet after, be rolled into the hot-strip of finished product thickness through mm finishing mill unit, roll back band steel after the cooling device cooling, enter coiling machine and batch rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100697551A CN101590488B (en) | 2008-05-27 | 2008-05-27 | Rolling technical skill of hot strip rough rolling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100697551A CN101590488B (en) | 2008-05-27 | 2008-05-27 | Rolling technical skill of hot strip rough rolling process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101590488A CN101590488A (en) | 2009-12-02 |
| CN101590488B true CN101590488B (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100697551A Active CN101590488B (en) | 2008-05-27 | 2008-05-27 | Rolling technical skill of hot strip rough rolling process |
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| Country | Link |
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| CN (1) | CN101590488B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834212A (en) * | 2016-05-16 | 2016-08-10 | 宋义 | Production technology for hot-rolled coiled plates and hot-rolled coiled plates |
| CN105921515B (en) * | 2016-05-20 | 2018-10-19 | 首钢集团有限公司 | Hot-rolling high-strength steel Automobile Plate descaling method |
| CN106853461A (en) * | 2017-03-07 | 2017-06-16 | 华北理工大学 | A kind of hot rolled steel plate production system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4294394A (en) * | 1978-08-07 | 1981-10-13 | Hitachi, Ltd. | Method of and apparatus for continuously rolling steel slabs |
| EP0460655A3 (en) * | 1990-06-06 | 1992-04-01 | Hitachi, Ltd. | Method of and apparatus for joining hot materials to be rolled to each other as well as continuous hot rolling method and system |
| CN1116136A (en) * | 1994-05-17 | 1996-02-07 | 株式会社日立制作所 | Hot strip rolling plant and method directly combined with continuous casting |
| CN1192170A (en) * | 1995-07-31 | 1998-09-02 | 曼内斯曼股份公司 | High-speed thin-slabbing plant |
| CN1104973C (en) * | 1996-11-28 | 2003-04-09 | Sms舒路曼-斯玛公司 | Hot rolling apparatus |
| CN1106233C (en) * | 1995-09-06 | 2003-04-23 | Sms舒路曼-斯玛公司 | Hot strip production plant for rolling thin rolled strip |
-
2008
- 2008-05-27 CN CN2008100697551A patent/CN101590488B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4294394A (en) * | 1978-08-07 | 1981-10-13 | Hitachi, Ltd. | Method of and apparatus for continuously rolling steel slabs |
| EP0460655A3 (en) * | 1990-06-06 | 1992-04-01 | Hitachi, Ltd. | Method of and apparatus for joining hot materials to be rolled to each other as well as continuous hot rolling method and system |
| CN1116136A (en) * | 1994-05-17 | 1996-02-07 | 株式会社日立制作所 | Hot strip rolling plant and method directly combined with continuous casting |
| CN1192170A (en) * | 1995-07-31 | 1998-09-02 | 曼内斯曼股份公司 | High-speed thin-slabbing plant |
| CN1106233C (en) * | 1995-09-06 | 2003-04-23 | Sms舒路曼-斯玛公司 | Hot strip production plant for rolling thin rolled strip |
| CN1104973C (en) * | 1996-11-28 | 2003-04-09 | Sms舒路曼-斯玛公司 | Hot rolling apparatus |
Non-Patent Citations (1)
| Title |
|---|
| JP平4-105701A 1992.04.07 |
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| CN101590488A (en) | 2009-12-02 |
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Application publication date: 20091202 Assignee: GUANGXI SHENGLONG METALLURGICAL CO.,LTD. Assignor: CISDI ENGINEERING Co.,Ltd. Contract record no.: X2024500000002 Denomination of invention: A rolling process technology for rough rolling of hot-rolled strip steel Granted publication date: 20110615 License type: Common License Record date: 20240325 |