CN204276517U - A kind of production line that can replace conventional broadband steel hot continuous rolling - Google Patents

A kind of production line that can replace conventional broadband steel hot continuous rolling Download PDF

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Publication number
CN204276517U
CN204276517U CN201420688285.8U CN201420688285U CN204276517U CN 204276517 U CN204276517 U CN 204276517U CN 201420688285 U CN201420688285 U CN 201420688285U CN 204276517 U CN204276517 U CN 204276517U
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China
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mills
equipment
steekle
roughing
rolling
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Expired - Fee Related
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CN201420688285.8U
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Chinese (zh)
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赵华国
马博
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China First Heavy Industries Co Ltd
CFHI Dalian Design and Research Institute Co Ltd
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China First Heavy Industries Co Ltd
CFHI Dalian Design and Research Institute Co Ltd
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Abstract

A production line for conventional broadband steel hot continuous rolling can be replaced, comprise and setting gradually and the stove district equipment be linked in sequence, roughing district equipment, shear zone equipment, steekle mill district equipment and coiling area equipment.This production line only just can complete with 4 rolling mills the operation of rolling that conventional broadband steel hot continuous rolling production line at least needs just can complete with 8 or 9 rolling mills.Use the above-mentioned processing technology that can replace conventional broadband steel hot continuous rolling production line, annual production and conventional hot continuous rolling machine are consistent substantially.The steel grade produced is in extensive range.Product thickness specification is generally 1.5 ~ 25.4mm.Length reduces half compared with conventional broadband steel hot continuous rolling cooling facility for laminar flow, and whole runout table length is contraction in length 1/3rd compared with conventional broadband steel hot continuous rolling, thus shortens the total length of production line, alleviates gross weight of equipment amount.Power of motor and the cost that energy consumption is less, the normal operating maintenance of minimizing equipment is safeguarded.Because the oxidization time of band steel in coiler furnace shortens, surface quality and lumber recovery are improved.

Description

A kind of production line that can replace conventional broadband steel hot continuous rolling
Technical field
The utility model relates to the production line of iron and steel, nonferrous metallurgy hot continuous rolling.
Background technology
The layout pattern of tradition hot continuous rolling production line is divided into fully continuous type, 3/4 continous way and semi continuous, consider production efficiency, economize energy, raising volume weight, reduce the factors such as product thickness, the layout pattern of For Hot Strip Mill Line mostly is semi continuous, its roughing region is made up of 1 frame or 2 stand reversible roughing mills, and finish rolling region is made up of 6 ~ 8 frame unidirectional type finishing mills.The technological process of production line is generally: the thick de-scaling of qualified zero defect slab → heating → water under high pressure → roughing mill reversible rolling → Coil Box → flying shear → high pressure crystal de-scaling → mm finishing mill unit tandem rolling → band steel cooling → downcoiler, its steel grade produced is in extensive range, the thickness specification of product is generally 1.5 ~ 25.4mm, annual production is higher, the surface quality of product and better mechanical property, consider that in the operation of rolling, flow process is smooth and easy, the frame quantity of milling train is more, and the total length of production line is very long.Cause apparatus for production line gross weight very heavy very large with driving motor general power, result in investment, floor space and energy consumption all very large.The maintenance maintenance cost causing production line normally to produce is very large, very large, the public auxiliary auxiliary facility of water power general mood equal energy source medium consumption is many, production line personnel depaly also many unfavorable factors such as many.
Under the prerequisite of therefore how substantially not losing in the surface quality of the steel grade scope ensureing to produce, production efficiency, annual production, product thickness specification, product and mechanical performance etc., by shortening production line total length, to reduce that apparatus for production line form, enhances productivity, reduces investment, reduction energy consumption and equipment normal operating maintenance maintenance cost be key of the present utility model.
Utility model content
For solving the problems referred to above that prior art exists, the utility model proposes following technical scheme: a kind of production line that can replace conventional broadband steel hot continuous rolling, comprise and setting gradually and the stove district equipment be linked in sequence, roughing district equipment, shear zone equipment, steekle mill district equipment and coiling area equipment.Stove district equipment comprises at least one heating furnace, the material loading end of this heating furnace is provided with dress steel machine and discharge end is provided with extractor.Roughing district equipment sets gradually high-pressure water descaler and roughing mills.Roughing mills be set gradually and be linked in sequence vertical miller, four roller reversible roughing mills, No. two four roller reversible roughing mills and No. two vertical millers.The entrance side of a vertical miller is provided with manipulator before roughing mill, and the outlet side of No. two four roller reversible roughing mills is provided with manipulator after roughing mill.Shear zone equipment comprises flying shear, and the entrance side of this flying shear is provided with cuts front jig.Steekle mill district equipment sets gradually entrance coiler furnace, mm finishing mill unit and outlet coiler furnace.Mm finishing mill unit sets gradually and be linked in sequence four roller reversible steekle mills and No. two four roller reversible steekle mills.The entrance side of four roller reversible steekle mills is provided with steekle mill inlet side-guiding-board, the outlet side of No. two four roller reversible steekle mills is provided with steekle mill outlet side guide plate, is provided with kink between steekle mill between four roller reversible steekle mills and No. two four roller reversible steekle mills.Coiling area equipment is disposed with cooling facility for laminar flow and at least one downcoiler, and the entrance side of this downcoiler is provided with jig on front side of coiling machine.
Use the above-mentioned processing technology that can replace the production line of conventional broadband steel hot continuous rolling, comprise the following steps:
(I). the qualified slab of zero defect obtained from continuous casting unit heats by filling steel machine loading heating furnace;
(II). slab, according to rolling shedule, is held out by extractor by slab after heating successively, puts on furnace delivery table, then is delivered to high-pressure water descaler through roller-way, removes the iron scale of slab upper and lower surface with water under high pressure;
(III). the slab after de-scaling delivers to through roller-way the rolling that a vertical miller, four roller reversible roughing mills, No. two four roller reversible roughing mills and No. two vertical millers carry out rough rolling step, the reversible tandem rolling passage of general roughing is 3 passages, the maximum mill speed of roughing mills is about 5m/s, slab rolling is become the intermediate blank of 20 ~ 35mm.Wherein vertical miller only participates in the rolling of odd-numbered pass, and No. two vertical millers only participate in the rolling of even-numbered pass.To need before first by roughing mill manipulator or roughing mill before every time rolling after, slab is carried out centering roll line by manipulator;
(IV). first the last passes of rough rolling step is rolled with threading speed, now threading speed is less than the maximum shear speed of flying shear, when the head of intermediate blank arrives flying shear place, irregular head is excised with flying shear, then the rolling that the finish rolling stage is carried out in steekle mill region is delivered to, the maximum mill speed 10m/s to 20m/s of mm finishing mill unit, is preferably 15m/s, intermediate blank is rolled into the band steel of required thickness;
(V). during the first passes in finish rolling stage, roughing mills and mm finishing mill unit form continuous rolling relationship, after strip steel head shuts out No. two four roller reversible steekle mills, sent in outlet coiler furnace by the pinch roll of outlet side and batch, the spool velocity of outlet coiler furnace is synchronous with mill speed, threading success afterwards band steel speed by threading speed raising speed be rolled to stabilized speed; When throwing steel, the speed of band steel shears tail speed by stabilized speed reduction of speed to flying shear, is rolled, until complete the first passes of mm finishing mill unit after back-end crop completes to throw steel speed; When being with steel to carry out reversible rolling, band steel is sent into entrance coiler furnace and is batched by the pinch roll of entrance side, and the spool velocity of same entrance coiler furnace is synchronous with mill speed.So, band steel generally carries out the reversible rolling of 1 ~ 5 passage in mm finishing mill unit, is rolled down to the finished product thickness of setting.Temperature in entrance coiler furnace and outlet coiler furnace is adopted and is computerizedd control, and according to the difference of production kind and technique, temperature controlling range is 950 ~ 1150 DEG C;
(VI). the band steel shut out from mm finishing mill unit is required to adopt suitable cooling system according to the difference of steel grade by cooling facility for laminar flow on the run-out table, band steel is cooled to the coiling temperature set by finishing temperature; Cooled band steel is delivered to downcoiler by pinch roll jig on front side of coiling machine and is batched.
The utility model adopting technique scheme compared with prior art, has following significant beneficial effect:
1. due to No. one and No. two four roller reversible roughing mills employing close-coupleds layouts, continuous rolling relationship is formed in reversible rolling process, and its working roll roller footpath is larger, in the same size with the roughing mill roller system of conventional broadband steel hot continuous rolling, have stronger billeting capacity, reduction in pass is large, the reversible rolling passage of general rough rolling step is 3 passages, be equivalent to 6 pressures, maximum mill speed is about 5m/s, improves the production capacity of roughing mills greatly; And the reversible rolling passage of the rough rolling step of conventional 1+7 wide steel strip hot tandem rolling is generally 5 ~ 7 times, the reversible rolling passage of the rough rolling step of conventional 2+7 wide steel strip hot tandem rolling is generally 6 times, the roughing rolling efficiency of the utility model production line improves greatly by contrast, therefore the production line whole rolling cycle and conventional broadband steel hot continuous rolling production line basically identical, annual production is higher;
2. the utility model is configured with two frame four roller reversible steekle mills in finish rolling district equipment, improve rolling efficiency, effectively decrease the reversible passage in finish rolling stage and enter the threading number of times of coiler furnace, accident rate is reduced, and the oxidization time of band steel in coiler furnace is shortened, thus ensure that surface quality and the lumber recovery of band steel;
3. the last passes of rough rolling step and the first passes in finish rolling stage form continuous rolling relationship, the then larger length shortening delay table, cooling manifold due to cooling facility for laminar flow is set to encryption cooling, length decreases half compared with conventional broadband steel hot continuous rolling cooling facility for laminar flow, whole runout table length is contraction in length 1/3rd compared with conventional broadband steel hot continuous rolling, therefore shortens the total length of production line;
4. the utility model production line only just can complete the whole operation of rolling with 4 rolling mills, and conventional broadband steel hot continuous rolling production line at least needs just can complete the operation of rolling with 8 framves or 9 rolling mills.The steel grade produced is in extensive range, and the thickness specification of product is generally 1.5 ~ 25.4mm, and production line total length is shorter, therefore comparatively light, the motor general power of gross weight of equipment amount and energy consumption is less, equipment normal operating maintenance maintenance cost is less.
Accompanying drawing explanation
Fig. 1 is production-line arrangement schematic diagram of the present utility model;
In figure: 1-fills steel machine; 2-heating furnace; 3-extractor; 4-high-pressure water descaler; Manipulator before 5-roughing mill; 6-vertical miller; 7-four roller reversible roughing mills; 8-No. bis-four roller reversible roughing mills; 9-No. bis-vertical millers; Manipulator after 10-roughing mill; 11-cuts front jig; 12-flying shear; 13-entrance coiler furnace; 14-steekle mill inlet side-guiding-board; 15-four roller reversible steekle mills; Kink between 16-steekle mill; 17-No. bis-four roller reversible steekle mills; 18-steekle mill outlet side guide plate; 19-exports coiler furnace; 20-cooling facility for laminar flow; Jig on front side of 21-coiling machine; 22-downcoiler.
Detailed description of the invention
Below in conjunction with Fig. 1, the utility model is described further.As shown in Figure 1, a kind of production line that can replace conventional broadband steel hot continuous rolling, comprises and setting gradually and the stove district equipment be linked in sequence, roughing district equipment, shear zone equipment, steekle mill district equipment and coiling area equipment.
Stove district equipment comprises at least one heating furnace 2, and the material loading end of heating furnace 2 and discharge end are provided with dress steel machine 1 and extractor 3.
Roughing district equipment sets gradually high-pressure water descaler 4 and roughing mills.Roughing mills sets gradually and be linked in sequence a vertical miller 6, four roller reversible roughing mill, 7, No. two four roller reversible roughing mills 8 and No. two vertical millers 9.Before the entrance side of four roller reversible roughing mills 7 is provided with roughing mill, the outlet side of manipulator 5, No. two four roller reversible roughing mills 8 is provided with manipulator 10 after roughing mill.The pressure mode of a vertical miller 6 and No. two vertical millers 9 is complete hydraulic pressing mode, and has automatic width control and short stroke control function, and a vertical miller 6 and No. two vertical millers 9 have the effect preventing rolled piece sideslip simultaneously.The pressure mode of four roller reversible roughing mills 7 and No. two four roller reversible roughing mills 8 can be adopted as hydraulic pressure and Electro-pressing mode, has hydraulic thickness controlling functions simultaneously.The inlet guide of four roller reversible roughing mills 7 and the outlet guide of No. two four roller reversible roughing mills 8 are equipped with high-pressure water descaling collector, the iron scale produced during for removing rolling, the inlet guide of four roller reversible roughing mills 7 and the outlet guide of No. two four roller reversible roughing mills 8 is equipped with the nozzle such as roll rolipass design, smog suppression simultaneously.The fore side of four roller reversible roughing mills 7 and No. two four roller reversible roughing mills 8 is provided with quick-replaceable working roll and backing roll changing machine.
Shear zone equipment comprises flying shear 12, and the entrance side of this flying shear is provided with cuts front jig 11.
Steekle mill district equipment sets gradually entrance coiler furnace 13, mm finishing mill unit and outlet coiler furnace 19.Mm finishing mill unit sets gradually and be linked in sequence four roller reversible steekle mills 15 and No. two four roller reversible steekle mills 17.The outlet side that the entrance side of four roller reversible steekle mills 15 is provided with steekle mill inlet side-guiding-board 14, No. two four roller reversible steekle mills 17 is provided with steekle mill outlet side guide plate 18.Be provided with kink 16 between steekle mill between four roller reversible steekle mills 15 and No. two four roller reversible steekle mills 17, ensure micro tension milling between milling train.The pressure mode of four roller reversible steekle mills 15 and No. two four roller reversible steekle mills 17 adopts complete hydraulic pressing mode, and has hydraulic AGC and work roll bending function.The inlet guide of four roller reversible steekle mills 15 and the outlet guide of No. two four roller reversible steekle mills 17 are equipped with high-pressure water descaling collector, during for removing rolling and coiler furnace insulation time the iron scale that produces, the inlet guide of four roller reversible steekle mills 15 and the outlet guide of No. two four roller reversible steekle mills 17 are equipped with roll rolipass design simultaneously, smog suppress, the nozzle such as interstand cooling and purging.The fore side of four roller reversible steekle mills 15 and No. two four roller reversible steekle mills 17 is provided with quick-replaceable working roll and backing roll changing machine.
Coiling area equipment is disposed with cooling facility for laminar flow 20 and at least one downcoiler 22.The entrance side of downcoiler 22 is provided with jig 21 on front side of coiling machine.The cooling manifold of cooling facility for laminar flow 20 is set to encryption cooling, improves collector cooling effectiveness, shortens the length of runout table.Downcoiler 22 is all-hydraulic Wrapping Roll formula, has automatic jump control function, and during to ensure to batch, inner ring of steel coil does not produce impression.
Use the above-mentioned processing technology that can replace the production line of conventional broadband steel hot continuous rolling, comprise the following steps:
(I). the qualified slab of zero defect obtained from continuous casting unit loads heating furnace 2 heat by filling steel machine 1;
(II). slab, according to rolling rhythm, is held out by extractor 3 by slab after heating successively, puts on furnace delivery table, is then delivered to high-pressure water descaler 4 through roller-way, is removed the iron scale of slab upper and lower surface by water under high pressure;
(III). the slab after de-scaling delivers to through roller-way the rolling that a vertical miller 6, four roller reversible roughing mill 7, No. two four roller reversible roughing mills 8 and No. two vertical millers 9 carry out rough rolling step, the reversible tandem rolling passage of general roughing is 3 passages, the maximum mill speed of roughing mills is about 5m/s, slab rolling is become the intermediate blank of 20 ~ 35mm; The wherein rolling of a vertical miller 6 participation odd-numbered pass, No. two vertical millers 9 participate in the rolling of even-numbered passes; To need before first by roughing mill manipulator 5 or roughing mill before every time rolling after, slab is carried out centering roll line by manipulator 10;
(IV). first the last passes of rough rolling step is rolled with threading speed, now threading speed is less than the maximum shear speed of flying shear 12, then when the head of intermediate blank arrives flying shear 12 place, irregular head is excised by flying shear 12, then the rolling that the finish rolling stage is carried out in steekle mill region is delivered to, the maximum mill speed of mm finishing mill unit is about 15m/s, intermediate blank is rolled into the band steel of required thickness;
(V). during the first passes in finish rolling stage, roughing mills and mm finishing mill unit form continuous rolling relationship, after strip steel head shuts out No. two four roller reversible steekle mills 17, sent in outlet coiler furnace 19 by the pinch roll of outlet side and batch, the spool velocity of outlet coiler furnace 19 is synchronous with mill speed, threading success after band steel speed by threading speed raising speed be rolled to stabilized speed, when steel will be thrown, speed with steel shears tail speed by stabilized speed reduction of speed to flying shear 12, be rolled to throw steel speed after back-end crop completes, until complete the first passes of mm finishing mill unit, when being with steel to carry out reversible rolling, band steel is sent into entrance coiler furnace 13 and is batched by the pinch roll of entrance side, and the spool velocity of same entrance coiler furnace 13 is synchronous with mill speed.So, band steel generally carries out the reversible rolling of 1 ~ 5 passage in mm finishing mill unit, is rolled down to the finished product thickness of setting.Temperature in entrance coiler furnace 13 and outlet coiler furnace 19 is adopted and is computerizedd control, and according to the difference of production kind and technique, temperature range 950 ~ 1150 DEG C, meets the requirement of insulation belt steel;
(VI). the band steel shut out from mm finishing mill unit is required to adopt suitable cooling system according to the difference of steel grade by cooling facility for laminar flow 20 on the run-out table, band steel is cooled to the coiling temperature set by finishing temperature; Cooled band steel is delivered to downcoiler by pinch roll and is carried out batching 22.
Below advantage of the present utility model is described further.In order to the annual production of production line more of the present utility model and conventional broadband steel hot continuous rolling production line, have chosen 8 groups of ideal formats for 1780mm specification below and compare, as shown in table 1:
Table 1. ideal format table
Sequence number Typical case's finished product thickness specification (mm)
1 1.8
2 2.5
3 5
4 8
5 12
6 16
7 20
8 25
Table 2 is the comparison of computational results table of 8 groups of ideal formats:
The comparison of computational results table of table 2.8 group ideal format
Can see from table 2, as finished product thickness≤5.0mm, the production capacity of the utility model production line is less than the production capacity of conventional 1+7 hot continuous rolling production line; As finished product thickness=8.0mm, the production capacity of production line of the present utility model and the production capacity of conventional 1+7 hot continuous rolling production line basically identical; As finished product thickness >=12.0mm, the production capacity of production line of the present utility model is greater than the production capacity of conventional 1+7 hot continuous rolling production line.If according to each thickness proportion calculating mean value in table 2, then the production capacity of production line of the present utility model equals the production capacity of conventional 1+7 hot continuous rolling production line.
In order to the quality of production line more of the present utility model and conventional broadband steel hot continuous rolling production line, compare for 1780mm specification below, as shown in table 3:
Table 3. two kinds of production line part index number comparison sheets
As can be seen from Table 3, the utility model production line is about 160000mm than conventional 1+7 hot continuous rolling production line contraction in length; The utility model production line reduces about 4000t than conventional 1+7 hot continuous rolling production line plant equipment gross weight (not comprising material loading and blanking), main rolling electric machine general power reduces 21600kW.By above-mentioned relatively can find out the prerequisite of substantially not losing in the surface quality etc. of the steel grade scope ensureing to produce, production efficiency, annual production, product thickness specification, product under use the utility model production line, newly-built steel plant investment totle drilling cost at least reduces by more than 30% compared with conventional 1+7 hot continuous rolling production line, and prediction device normal operating maintenance maintenance cost compared with conventional 1+7 hot continuous rolling production line also by reduction by more than 30%.
The above; be only preferably detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; all method personnel being familiar with this method field, within the scope of method disclosed in the utility model, are equal to replace or change according to method scheme of the present utility model and design of the present utility model and all should be encompassed within protection domain of the present utility model.

Claims (1)

1. can replace a production line for conventional broadband steel hot continuous rolling, comprise and setting gradually and the stove district equipment be linked in sequence, roughing district equipment, shear zone equipment, steekle mill district equipment and coiling area equipment;
Described stove district equipment comprises at least one heating furnace (2), the material loading end of this heating furnace (2) is provided with dress steel machine (1) and discharge end is provided with extractor (3);
Described roughing district equipment sets gradually high-pressure water descaler (4) and roughing mills, described roughing mills be set gradually and be linked in sequence vertical miller (6), four roller reversible roughing mills (7), No. two four roller reversible roughing mills (8) and No. two vertical millers (9); The entrance side of a described vertical miller (6) is provided with manipulator (5) before roughing mill, and the outlet side of No. two described four roller reversible roughing mills (8) is provided with manipulator (10) after roughing mill;
Described shear zone equipment comprises flying shear (12), and the entrance side of this flying shear (12) is provided with cuts front jig (11);
Described steekle mill district equipment sets gradually entrance coiler furnace (13), mm finishing mill unit and outlet coiler furnace (19); Described mm finishing mill unit sets gradually and be linked in sequence four roller reversible steekle mills (15) and No. two four roller reversible steekle mills (17); The entrance side of described four roller reversible steekle mills (15) is provided with steekle mill inlet side-guiding-board (14), the outlet side of No. two described four roller reversible steekle mills (17) is provided with steekle mill outlet side guide plate (18), is provided with kink between steekle mill (16) between described four roller reversible steekle mills (15) and No. two four roller reversible steekle mills (17);
Described coiling area equipment is disposed with cooling facility for laminar flow (20) and at least one downcoiler (22), and the entrance side of this downcoiler (22) is provided with jig on front side of coiling machine (21).
CN201420688285.8U 2014-11-17 2014-11-17 A kind of production line that can replace conventional broadband steel hot continuous rolling Expired - Fee Related CN204276517U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104399748A (en) * 2014-11-17 2015-03-11 一重集团大连设计研究院有限公司 Production line capable of replacing conventional hot continuous rolling production line of wide strip steel and rolling process
CN109226257A (en) * 2018-08-17 2019-01-18 武钢集团昆明钢铁股份有限公司 A kind of method and its production line of plate steekle mill rolled plate
CN110319333A (en) * 2018-03-30 2019-10-11 宝山钢铁股份有限公司 A kind of sliding bearing benefit rouge method for large-scale intermittent motion

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104399748A (en) * 2014-11-17 2015-03-11 一重集团大连设计研究院有限公司 Production line capable of replacing conventional hot continuous rolling production line of wide strip steel and rolling process
CN104399748B (en) * 2014-11-17 2016-08-24 一重集团大连设计研究院有限公司 A kind of production technology that can replace conventional broadband steel hot continuous rolling
CN110319333A (en) * 2018-03-30 2019-10-11 宝山钢铁股份有限公司 A kind of sliding bearing benefit rouge method for large-scale intermittent motion
CN109226257A (en) * 2018-08-17 2019-01-18 武钢集团昆明钢铁股份有限公司 A kind of method and its production line of plate steekle mill rolled plate

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