CN1640569A - Direct rolling process for heavy-medium plate billet continuous casting-rolling mill set - Google Patents
Direct rolling process for heavy-medium plate billet continuous casting-rolling mill set Download PDFInfo
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- CN1640569A CN1640569A CN 200410021047 CN200410021047A CN1640569A CN 1640569 A CN1640569 A CN 1640569A CN 200410021047 CN200410021047 CN 200410021047 CN 200410021047 A CN200410021047 A CN 200410021047A CN 1640569 A CN1640569 A CN 1640569A
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Abstract
The present invention discloses a straight rolling process of heavy and medium slab continuous-casting continuous-rolling mill train. Its technological process includes the following steps: converter-LF furnace-casting machine-cutting slab into size-feeding roller table-high-pressure water descaling-vertical roll sizing-roughing-hot coiling box-flying shear cutting head and cutting tail-high pressure water descaling-finished rolling-laminar flow cooling-coiling to obtain finished product. It is characterized by adopting casting blank straight rolling process.
Description
Technical field
The invention belongs to metallurgical steel rolling field, specifically is a kind of direct-rolling process of cut deal continuous-casting tandem-rolling unit.
Background technology
In recent years along with the aggravation of world energy sources crisis, metallurgy industry is as having produced serious contradiction between expansion of energy consumption rich and influential family production capacity and the energy shortage, the production technology of energy saving, consumption reduction and high efficiency becomes the main direction of studying of smelter, the casting and rolling process of smelter rise in recent years is the energy-saving and cost-reducing developing direction that provides, it is 463wh/t that casting and rolling process is routinely produced its energy consumption, can but in the technology of continuous casting and rolling, also continue to excavate new energy saving way? at the end of last century, some iron and steel enterprises attempt strand is adopted direct-rolling process, utilize the latent heat of strand inside further to realize purpose of energy saving, but never success, discover, cause this imagination failure that following reason is arranged, for thick continuous casting steel billet more than the 230mm, at first its casting rate can only be at 1.0m/min～1.8m/min, otherwise can cause bleed-out, according to this speed casting tapping, casting billet surface can only reach 700 ℃～800 ℃, want to realize rollingly can only deliver to heating in the heating furnace, can't realize directly rolling; For the following strand of 100mm, 1050 ℃～1100 ℃ of strand tapping temperatures, through rollgang, high-pressure water descaling during to roughing mill temperature drop to 950 ℃～900 ℃, continue when rolling because intermediate blank is thin heat radiation Q
Loose＞latent heat Q
DivePerformance rolled piece temperature reduces, arrive before the mm finishing mill unit temperature can only reach 750 ℃～800 ℃ assurances not rolled piece rolling more than transformation temperature, therefore can not guarantee the product quality of steel band, in order to guarantee that the rolled piece rolling quality has only concurrent heating measures such as adopting the tunnel stove, whether the energy of this concurrent heating measure loss differs what with the loss heat of heating furnace and also waits for fastidious.Between slab and thin plate, but because the restriction of various rolling conditions, do not guarantee the quality of rolled piece for 100mm～its potential heat value of 200mm slab, making directly, the technology of rolling can't realize.
Summary of the invention
The present invention can not realize the problem of direct-rolling process with regard to having continuously casting and continuously rolling technology now, puts forward the direct-rolling process of a cover cut deal continuous-casting tandem-rolling unit.
The object of the present invention is achieved like this, its technological process is that the disconnected chi-rollgang of converter-LF stove-casting machine-slab-high-pressure water descaling-edger roll Fixed width-roughing-Coil Box-flying shear cutting head cutting tail-high-pressure water descaling-finish rolling-laminar flow cools off-batches and is finished product, be characterized in adopting the strand direct-rolling process, concrete technological parameter is as follows:
1) adopt the close-coupled layout, the heating furnace that cancellation is conventional, casting machine and roll line guarantee the slab smooth delivery of power on same center line;
2) casting rate of strand is that the surface temperature of 2.0m/min～3.5m/min strand is 1000 ℃ ~ 1100 ℃, and strand is of a size of 100mm ~ 200mm * 900mm ~ 2000mm * 9000mm ~ 20000mm;
3) adopt short distance high speed through type roller-way, the long 15m～20m of its roller-way, the transmission speed of roller-way is 0.5m/s～1.5m/s;
4) adopt water under high pressure, high density nozzle descaling process, the two rows collector pipe, adjustable height, the pressure of water is 25MPa～30Mpa, the nozzle number is 4 * 30;
5) on the through type roller-way, add omnidistance covering and heat insulating cover;
6) two milling trains, heavy reduction, parallel rolling are adopted in roughing; Two roughing mill R1 and R2 are set, two milling trains are simultaneously rolling, adopt parallel rolling method, R1 is a duo mill, its dimension of roller is φ 1350mm/ φ 1250mm * 2150mm, maximum rolling force 3000t～4000t, main motor AC5000kW * 2 * 15/45r/min, R2 milling train are four-high reversing mill, dimension of roller is φ 1250/ φ 1150mm * 2150mm, support roller φ 1650/ φ 1500mm * 2150mm, maximum rolling force 5000t, main motor AC10000kW * 2 * 40/90r/min, mill speed 0.5m/s～5.89m/s, roughing unit passage maximum reduction 50mm, rolling pass is 4 roads～6 roads, 950 ℃～1000 ℃ of the finishing temperatures of roughing;
7) roll the tandem rolling unit and adopt 7, its rolling mill roll is of a size of φ 850/ φ 765mm * 2450mm, support roller φ 1600/ φ 1400mm * 2150mm, maximum rolling force 4500t, its main motor is AC10000kW * 4 * 150/450r/min and AC10000kW * 3 * 200/600r/min, mill speed 7.33m/s～21.98m/s, 820 ℃～950 ℃ of the finishing temperatures of finish rolling.
For guaranteeing the width dimensions of rolled piece, width dimensions, front at roughing R1, R2 milling train respectively is provided with the Fixed width vertical miller, the vertical miller dimension of roller is φ 1200/ φ 1100mm * 430mm, maximum rolling force 3800kN, main motor AC1200kW * 2 * 200/400r/min, mill speed 0.5m/s～5.89m/s.
System's generation production accident when preventing rolling mill fault is provided with a coil inserting apparatus in a side of rolling line casting machine exit roller-way, delivers to other rolling lines and is rolled in case certain milling train breaks down strand to be rolled off the production line.
The present invention establishes Coil Box in the roughing mill back, and the one, reduce the strand thermal loss, the 2nd, rollgang is shortened, can make rollgang reduce 30m～50m.
Advantage of the present invention and effect are: the cancellation heating furnace, adopt quick rolling mill practice, on each link, adopt the corresponding techniques means, guarantee that the strand shortest time enters rolling process, make full use of the energy of the inner latent heat of strand, rolling cycle of the present invention is short, the average production cycle 30min～50min that shortens, reduced the loss of the online temperature of rolled piece, the casting billet surface temperature drop only is 150 ℃～200 ℃, it is above rolling to be implemented in phase transformation, thereby has guaranteed the quality of rolled piece, experimental results show that the about 0.9GJ/t of energy efficient of the present invention, improve lumber recovery and reach 0.5%, the more important thing is of the present invention be embodied as metallurgical steel rolling technology provide one energy-conservation, the new direction of High-efficient Production.
Description of drawings
Accompanying drawing 1 is a process chart of the present invention,
Accompanying drawing 2 is roughing of the present invention district rolled piece temperature curve schematic diagram,
1 converter, 2 FL stoves, 3 casting machines, 4 slabs, 5 stay-warm cases, 6 high-pressure water descalings, 7 vertical millers, 8 R1 roughing mills, 9 vertical millers, the reversible roughing mill of 10 R2, four rollers, 11 Coil Box, 12 flying shears, 13 high-pressure water descalings, 14 mm finishing mill unit, the cooling of 15 laminar flows, 16 downcoilers, 18 coil inserting apparatus.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is elaborated
Technological process of the present invention is that the disconnected chi-rollgang of converter-LF stove-casting machine-slab-high-pressure water descaling-edger roll Fixed width-roughing-Coil Box-flying shear cutting head cutting tail-high-pressure water descaling-finish rolling-laminar flow cools off-batches and is finished product, be characterized in adopting the strand direct-rolling process, concrete parameter is as follows:
1) adopts the close-coupled layout, cancelled conventional heating furnace device, and made casting machine and roll line on same center line; Guarantee the slab smooth delivery of power;
2) casting rate of strand is 2.0m/min～3.5m/min, 1000 ℃～1100 ℃ of the temperature of strand, and strand is of a size of 100mm～200mm * 900mm～2000mm * 9000mm～20000mm;
3) adopt short distance high speed through type roller-way, to the long 15m～20m of roughing mill R1 roller-way, the transmission speed of roller-way is 0.5m/s～1.5m/s from casting machine; Guarantee that strand 3min～5min enters milling train by casting machine;
4) add omnidistance covering and heat insulating cover on the through type roller-way, promptly the rolling space of all strands adds stay-warm case on rolling line, strand is dispelled the heat on roller-way reach purpose of energy saving less;
5) adopt water under high pressure, high density nozzle descaling process, strand is respectively established two water drainage and collection pipes up and down, and the height apart from strand can be adjusted up and down, the pressure of water is 25MPa～30Mpa, the nozzle number is 4 * 30, conventional its pressure of high-pressure water descaling is 18MPa～20Mpa, the nozzle number is about 4 * 24, because pressure small nozzle number is few, do not reach the effect of de-scaling, the present invention adopts its high pressure and multi-jet descaling method because the fortune base speed of roller-way is fast, make the scale removal effect of strand good, temperature decrease fall little.
6) two milling trains are adopted in roughing, heavy reduction, the while rolling mill practice, utilize latent heat and plastic deformation heat to make the rolled piece release heat, offset the heat of about 200 ℃ of the required temperature drops of slab, two roughing mill R1 and R2 are set, two milling trains are simultaneously rolling to different strands, so not only can save rolling time, can also shorten the spacing of two milling trains comparatively speaking, R1 is that its dimension of roller of duo mill is φ 1350mm/ φ 1250mm * 2150mm, maximum rolling force 3000t～4000t, main motor AC5000kW * 2 * 15/45r/min, the R2 milling train is a four-high reversing mill, dimension of roller is φ 1250/ φ 1150mm * 2150mm, support roller φ 1650/ φ 1500mm * 2150mm, maximum rolling force 5000t, main motor AC10000kW * 2 * 40/90r/min, mill speed 0.5m/s～5.89m/s, roughing unit passage maximum reduction 50mm, rolling pass is 4 roads～6 roads; Adopt the 3+1 milling method, promptly the R1 milling train rolls three passages, and the R2 milling train rolls a time; Or employing 5+1 milling method, be that the R1 milling train rolls five passages, the R2 milling train rolls a time, the assurance thermal loss is little, and in the operation of rolling, the loss of roughing normal temperature is 80 ℃～20 ℃, its heat is Q1, make strand internal and external temperature uniformity because the latent heat of the medium heavy slab of 100mm～200mm, can guarantee the latent heat release of 4 roads～6 road rolling process of rough rolling than higher, its release heat is Q2; The temperature that discharges in rolling is 150 ℃～200 ℃, and its heat Q2 〉=Q1 removes the high-pressure water descaling thermal loss, and the finishing temperature of roughing can reach 950 ℃～1000 ℃, the temperature promulgation curve map of this moment, as shown in Figure 2;
7) finish rolling tandem rolling unit adopts 7, its rolling mill roll is of a size of φ 850/ φ 765mm * 2450mm, support roller φ 1600/ φ 1400mm * 2150mm, maximum rolling force 4500t, main motor AC10000kW * 2 * 150/450r/min, mill speed 0.5m/s～5.89m/s, 820 ℃～850 ℃ of the finishing temperatures of finish rolling, general mm finishing mill unit all adopts 5～6 rolling mills, and the present invention makes its effect of rolling better for the power of depressing and the frame number of its finish rolling effect of increase to finishing mill improved;
For guaranteeing the width dimensions of rolled piece, front at the roughing milling train respectively is provided with the Fixed width vertical miller, and the vertical miller dimension of roller is φ 1200/ φ 1100mm * 430mm, maximum rolling force 3800kN, main motor AC1200kW * 2 * 200/400r/min, mill speed 0.5m/s～5.89m/s.
System's generation production accident when preventing rolling mill fault, side at rolling line casting machine exit roller-way is provided with a coil inserting apparatus, deliver to other rolling lines and be rolled in case certain milling train breaks down strand to be rolled off the production line, also strand can be placed heating furnace heating back to continue rolling simultaneously.
The present invention establishes Coil Box in the roughing mill back, and the one, reduce the strand thermal loss, the 2nd, rollgang is shortened, can make rollgang reduce 30m～50m.
Table 1 is as follows with the experimental data of 135mm strand implementation direct-rolling process:
| Temperature (℃) | Time (s) | Base thick (mm) | |
| Fire is cut | 1060 | ?3 | ?135 |
| Roller-way | 970 | ?40 | |
| High-pressure water descaling | 950 | ?12 | |
| Roughing mill | 925 | ?53 | ?30～40 |
| High-pressure water descaling | 905 | ?15 | |
| Finish rolling | 845 | ?45 | ?4～10 |
Table 2 is as follows with the experimental data of 135mm strand implementation direct-rolling process
| Temperature (℃) | Time (s) | Base thick (mm) | |
| Fire is cut | 1040 | ?3 | ?135 |
| Roller-way | 960 | ?40 | |
| High-pressure water descaling | 940 | ?12 | |
| Roughing mill | 915 | ?49 | ?20～30 |
| High-pressure water descaling | 895 | ?15 | |
| Finishing mill | 830 | ?57 | ?1.5～3.0 |
Can find out that from last table technology biggest advantage of the present invention just is that operation of rolling time of strand is short, temperature drop is little, thereby realize still guaranteeing after the cancellation heating furnace quality requirement of rolled piece.
Claims (3)
1, a kind of direct-rolling process of cut deal continuous-casting tandem-rolling unit, its technological process is that the disconnected chi-rollgang of converter-LF stove-casting machine-slab-high-pressure water descaling-edger roll Fixed width-roughing-Coil Box-flying shear cutting head cutting tail-high-pressure water descaling-finish rolling-laminar flow cools off-batches and is finished product, it is characterized in that adopting the strand direct-rolling process, concrete technological parameter is as follows:
1) adopt the close-coupled layout, the heating furnace that cancellation is conventional, casting machine and roll line are on same center line;
2) Chu Gang casting rate is 2.0m/min～3.5m/min, and the surface temperature of tapping strand is 1000 ℃～1100 ℃, and strand is of a size of 100mm～200mm * 900mm～2000mm * 9000mm～20000mm;
3) adopt short distance, high speed through type roller-way, the long 15m～20m of its roller-way, the transmission speed of roller-way is 0.5m/s～1.5m/s;
4) on the through type roller-way, add omnidistance covering and heat insulating cover;
5) adopt water under high pressure, high density nozzle descaling process, strand is respectively established two water drainage and collection pipes up and down, and adjustable height;
6) two milling trains are adopted in roughing, heavy reduction, the while rolling mill practice, two roughing mill R1 and R2 are set, two milling trains are simultaneously rolling to different strands, R1 is that its dimension of roller of duo mill is φ 1350mm/1250mm φ mm * 2150mm, maximum rolling force 3000t～4000t, main motor AC5000kW * 2 * 15/45r/min, the R2 milling train is a four-high reversing mill, dimension of roller is φ 1250/ φ 1150mm * 2150mm, support roller φ 1650/ φ 1500mm * 2150mm, maximum rolling force 5000t, main motor AC10000 kW * 2 * 40/90r/min, mill speed 0.5m/s～5.89m/s, passage maximum reduction 50mm, rolling pass is 4 roads～6 roads, 950 ℃～1000 ℃ of the finishing temperatures of roughing;
7) finish rolling tandem rolling unit adopts 7, its rolling mill roll is of a size of φ 850/ φ 765mm * 2450mm, support roller φ 1600/ φ 1400mm * 2150mm, maximum rolling force 4500t, its main motor is AC10000kW * 4 * 150/450r/min and AC10000kW * 3 * 200/600r/min, mill speed 7.33m/s～21.98m/s, 820 ℃～950 ℃ of the finishing temperatures of finish rolling.
2, the direct-rolling process of a kind of cut deal continuous-casting tandem-rolling unit according to claim 1 is characterized in that described water under high pressure pressure is 25MPa～30Mpa, and the nozzle number is 4 * 40.
3, the direct-rolling process of a kind of cut deal continuous-casting tandem-rolling unit according to claim 1 is characterized in that in a side of rolling line casting machine exit roller-way one coil inserting apparatus being set.
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| CN 200410021047 CN1640569A (en) | 2004-01-12 | 2004-01-12 | Direct rolling process for heavy-medium plate billet continuous casting-rolling mill set |
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| CN 200410021047 CN1640569A (en) | 2004-01-12 | 2004-01-12 | Direct rolling process for heavy-medium plate billet continuous casting-rolling mill set |
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| CN101209456B (en) * | 2006-12-27 | 2010-11-03 | 鞍钢股份有限公司 | High-strength medium plate production process |
| CN102101124A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Production method for eliminating edge defects of hot rolled strip steel |
| CN102343359A (en) * | 2010-07-21 | 2012-02-08 | 丹尼尔和科菲森梅克尼齐有限公司 | Temperature maintainance and/or heating apparatus for long metal products and the corresponding method |
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| CN103593719A (en) * | 2013-11-29 | 2014-02-19 | 湘潭大学 | Rolling energy-saving method based on optimal matching of slabs and contracts |
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| CN101209456B (en) * | 2006-12-27 | 2010-11-03 | 鞍钢股份有限公司 | High-strength medium plate production process |
| CN102101124A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Production method for eliminating edge defects of hot rolled strip steel |
| CN102343359A (en) * | 2010-07-21 | 2012-02-08 | 丹尼尔和科菲森梅克尼齐有限公司 | Temperature maintainance and/or heating apparatus for long metal products and the corresponding method |
| EP2656946A4 (en) * | 2010-12-23 | 2017-10-25 | Institute of Metal Research Chinese Academy of Sciences | Method for enhancing self-feeding ability of heavy section casting blank |
| CN103480647A (en) * | 2013-09-18 | 2014-01-01 | 陕西钢铁集团有限公司 | Device and method for manufacturing reinforcing steel bars by means of directly rolling small square billets at low temperatures without heating |
| CN103480647B (en) * | 2013-09-18 | 2016-03-23 | 陕西钢铁集团有限公司 | A kind of device and production method thereof of producing reinforcing bar without heating low temperature Direct Rolling small billet |
| CN103480649A (en) * | 2013-10-12 | 2014-01-01 | 钢铁研究总院 | Method for producing long section bar in direct rolling mode |
| CN103480649B (en) * | 2013-10-12 | 2016-10-05 | 钢铁研究总院 | A kind of Direct Rolling produces the method for long profiles |
| CN103593719A (en) * | 2013-11-29 | 2014-02-19 | 湘潭大学 | Rolling energy-saving method based on optimal matching of slabs and contracts |
| CN103593719B (en) * | 2013-11-29 | 2016-08-17 | 湘潭大学 | A kind of rolling power-economizing method based on slab Yu contract Optimized Matching |
| CN106180192A (en) * | 2016-08-31 | 2016-12-07 | 中冶赛迪工程技术股份有限公司 | A kind of wire and rod continuous casting billet high speed direct sending directly rolls system and method |
| CN108067508A (en) * | 2016-11-17 | 2018-05-25 | 格朗吉斯铝业（上海）有限公司 | The automatic hot rolling adhesive bonding method and equipment of composite ingot |
| CN106734196A (en) * | 2017-01-11 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | Belt steel rolling method |
| CN106734196B (en) * | 2017-01-11 | 2018-12-14 | 首钢京唐钢铁联合有限责任公司 | Belt steel rolling method |
| CN107185992A (en) * | 2017-06-09 | 2017-09-22 | 四川建筑职业技术学院 | A kind of composite board rolling aligning building mortion and method |
| CN107695100A (en) * | 2017-09-29 | 2018-02-16 | 四川德胜集团钒钛有限公司 | A kind of steel exempt from heating and directly roll system and method |
| CN108941494A (en) * | 2018-09-25 | 2018-12-07 | 湖南华菱湘潭钢铁有限公司 | A kind of Process of Hot Transfering And Hot Charging of cut deal continuous casting billet |
| CN108941494B (en) * | 2018-09-25 | 2020-07-07 | 湖南华菱湘潭钢铁有限公司 | Hot-feeding and hot-charging process for medium-thickness plate continuous casting billet |
| CN109290540A (en) * | 2018-10-26 | 2019-02-01 | 中冶连铸技术工程有限责任公司 | Continuous small-billet casting casting-rolling technology method and apparatus |
| WO2021063364A1 (en) * | 2019-09-30 | 2021-04-08 | 宝钢湛江钢铁有限公司 | High-efficiency double-frame double-cutting line feed-through intermediate thickness slab production line and production method |
| CN113862552A (en) * | 2021-09-10 | 2021-12-31 | 首钢长治钢铁有限公司 | Steel wire rod for welding and preparation method thereof |
| CN113862552B (en) * | 2021-09-10 | 2022-07-22 | 首钢长治钢铁有限公司 | Steel wire rod for welding and preparation method thereof |
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Owner name: ANGANG NEW STEEL ROLLING CO., LTD. Free format text: FORMER OWNER: XINGANGTIE CO., LTD., ANSHAN IRON AND STEEL GROUP Effective date: 20070119 |
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Effective date of registration: 20070119 Address after: 114009, No. 63, Wuyi Road, MTR Eastern District, Liaoning, Anshan Applicant after: New Steel Rolling Co., Ltd., Anshan Iron and Steel Co. Address before: 114001 No. 31 Shengli Road, Tiedong District, Liaoning, Anshan Applicant before: Xingangtie Co., Ltd., Anshan Iron and Steel Group |
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Open date: 20050720 |