CN106077091A - Low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method - Google Patents
Low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method Download PDFInfo
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- CN106077091A CN106077091A CN201610465697.9A CN201610465697A CN106077091A CN 106077091 A CN106077091 A CN 106077091A CN 201610465697 A CN201610465697 A CN 201610465697A CN 106077091 A CN106077091 A CN 106077091A
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- Prior art keywords
- continuous casting
- rolling
- roller
- shaped steel
- way
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
Abstract
The invention discloses a kind of low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method.Its technological process is: smelting molten steel temperature control direct casting single current or multithread also cool down or burning optimization on line finishing packaging and warehousing for double fluid, the finished product segmentation of hot delivering technology of CC billets single line (or two-wire) continuous rolling or curling.Instant invention overcomes existing shaped steel, workshop floor space that Bar Wire Product production technology exists is big, energy waste, flue dust and CO2 emission, recovery rate of iron is low, production management is difficult problem.Compared with the prior art, floor space 1000～5000m is reduced2；Ton steel saves standard coal 35～70 kilograms；Reduce flue dust and CO2 emission 500～800m3/t；Reduce oxidization burning loss and cut damage and roll useless 2～3%；Reduce equipment loss and maintenance cost；Realize continuous casting and steel rolling integrated management.
Description
Technical field
The present invention relates to the process of Ferrous Metallurgy continuous casting and roll forming, particularly hot continuous casting blank direct rolling and forming
The continuous casting and tandem rolling production method of rod iron wire rod.
Background technology
Ferrous metallurgical industry be one of mainstay of the national economy industry, continuous casting and steel rolling be all the important ring of its production procedure
Joint.In producing due to long material, conticaster can not mate completely with milling train production capacity, and traditional type Bar Wire Product continuous casting billet milling technique is adopted
By blank cold charge and blank hot charging two ways, technological process causes heat-energy losses.Blank hot-mounting process flow process is:
Conventional hot charging blank to steel rolling too long in flow from continuous casting, is delivered to mill temperature and cannot be met start rolling temperature after cutting ingot, need through
Cross heating furnace post bake, fail to realize hot continuously cast material Direct Rolling.Especially when rolling line accident, change specification change kind time, continuous casting
Blank need to roll off the production line wait, causes very big energy waste.
Continuous casting billet hot charging or cold charge produce shaped steel, Bar Wire Product is primarily present following problem:
1, conticaster is long to the distance of milling train, and continuous casting workshop is big with mill floor space, equipment is invested with Factory Building
Greatly, centre send base link too much, be unfavorable for manipulation and production management.
2, through cutting scale, the link such as send traversing, hot after casting of continuous-cast billet molding, when arriving rolling line, strand temperature is by 1300
Be reduced to about degree 700 degree even lower, cause thermal loss, energy waste.
3, continuous blank-discharging line and rolling line be not on same indexed plane, continuous casting material need to be promoted to mill line elevation, limits
Blank cut lengths (typically not greater than 15 meters), during the rolling of short scale, the dynamic velocity drop that steel causes frequently stung by milling train, produces punching
Hit load, be unfavorable for that rolling is stable, reduce operating rate of rolling mill, cut damage and roll useless rate and reach 2%, simultaneously to rolling line equipment and control system
Make a big impact.
4, gas-fired furnace carries out post bake to continuous casting billet, not only increases the equipment investment of heating furnace, maintenance, operator
Member's cost, also results in energy resource consumption and environmental pollution (loss per ton steel standard coal 35～70 kilograms, flue dust and CO2 emission
500～800m3/t), produce oxidation loss 0.8～1.2% simultaneously.
5, continuous casting does not mates with steel rolling production capacity, rolling line accident treatment, changes kind, changes specification and cause continuous casting and Rolling production not
Synchronizing, continuous casting billet need to roll off the production line and stack or be temporarily stored in stokehold wait, increases stacking place and link had bad luck by blank.
Summary of the invention
For solving the problems referred to above, it is an object of the invention to provide the low energy consumption continuous casting heat of a kind of energy-saving and emission-reduction, low cost
Base Direct Rolling shaped steel Bar Wire Product production method.
For reaching above-mentioned purpose, the low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method of the present invention, the party
Method comprises the following steps:
A. molten steel direct casting in conticaster, makes strand through tundish, crystallizer, cooling twice, withdrawal straightening machine, draws
After rectifying, strand temperature reaches 1350 degree, and during with single current or double fluid rolling, in the operation of rolling, strand does not cuts off；
B. continuous casting billet is fed directly to Continuous mill train by roller-way and rolls, and i.e. sends in the single hole of same frame or diplopore and rolls
System, it is achieved single current or continuous casting of two strands in parallel base single line in the same rack or two-wire continuous casting and rolling, shuts out into through 7～36 passages
Product.
C. the finished product shut out is clipped or batches, cools down or burning optimization on line, finishing, pack, put in storage.
During it is also preferred that the left use two-wire continuous casting and rolling, after 4～22 passage tandem mill unit diplopores roll simultaneously, make
With turnout, two-wire is separated, respectively enter 3～14 passages of a set of Continuous mill train rolling and go out finished product.
It is also preferred that the left the cooling twice described in step a uses feedback control, optimize secondary cooling zone water distribution, improve strand temperature；With
And use short route quickly to send base, reduce thermal loss.
It is also preferred that the left arrange induction furnace between conticaster and the tandem mill described in step b described in step a, off-line or
The continuous casting billet that line waits rolls after sending into induction furnace concurrent heating by roller-way.
It is also preferred that the left single current described in step b or continuous casting of two strands in parallel base single line in the same rack or two-wire continuous casting and rolling.
It is also preferred that the left any two product in shaped steel, bar, high line, bulk lots volume will be rolled into after two-wire separated time described in step c
Combination or the single kind two-wire planted produce simultaneously.
For reaching above-mentioned purpose, the low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method of the present invention, it is special
Levy and be that the method comprises the following steps:
A. molten steel direct casting in conticaster, makes strand through tundish, crystallizer, cooling twice, withdrawal straightening machine, draws
After rectifying, strand temperature reaches 1350 degree, uses multithread rolling, becomes scale strand by hydraulic shear fast shut-off；
B., continuous casting billet is quickly cut into after withdrawal straightening machine 18～45 meters of scales, and insulating roller way quickly send steel, and roller table speed reaches
3m/s, is merged into multithread single current by roller-way conveying or double fluid is sent into 7～36 passages of tandem mill rolling and shut out finished product；
C. the finished product shut out is clipped or batches, cools down or burning optimization on line, finishing, pack, put in storage.
It is also preferred that the left the roller-way described in step b is with thermal insulation cover；During Multi-strand Continuous Casting, roller-way divides three sections of layouts, is close to continuous casting
One section of roller-way of machine is packet (often flowing corresponding one group) the straightway short roll table that is arranged in parallel (barrel length 300～800mm), roller-way
Total length 30～45 meters；Followed by segment length's roller-way (barrel length 2100～6000mm), Multi-strand Continuous Casting base is merged into two
Stream, roller-way total length 36～48 meters；Final stage is mill front roll road, transports two steel billets, roller-way total length 24～30 simultaneously
Rice, this section of roller-way arranges induction heater.
The technique of the invention described above, produces the upgrading process technology of a kind of energy-saving and emission-reduction cost efficiency that provides, contracting for iron and steel
Short continuous casting is to the technological process of steel rolling, it is to avoid conventional type of production rod iron wire rod uses the continuous casting billet post bake energy that short blank brings
The defects such as steel impact load, production accident frequently stung by amount loss, milling train, it is achieved fast continuous casting tandem rolling, and achieve and give birth to simultaneously
Produce shaped steel Bar Wire Product combination product and fast quick change kind changes specification, be greatly improved operating rate of rolling mill.
Detailed description of the invention
It is further described to invent below in conjunction with embodiment.
Embodiment 1
The low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method of the present invention, produces bar with two strand casting machine
Or as a example by bar and high line combination product, the method comprises the following steps:
A. ladle poured into by molten steel, is cast to direct casting in machine two strand casting machine, through tundish, crystallizer, secondary
Cooling, withdrawal straightening machine make two stream strands, the pulling rate 4.0m/min of strand, casting blank cross-section size 165mm × 165mm, cast after straightening
Base temperature reaches 1250 degree, rolls with double fluid, and in the operation of rolling, strand does not cuts off；
B. continuous casting billet is fed directly to Continuous mill train rolling by roller-way, i.e. sends in the diplopore groove of same frame and rolls, often
Hole slot second flow is equal with every stream caster second flow, it is achieved continuous casting of two strands in parallel base two-wire continuous casting and rolling in the same rack, through 8～
After 22 passage tandem mill rollings, use turnout to be separated by two-wire, respectively enter 4～14 passages of a set of Continuous mill train rolling and go out
Finished product.
C, the finished product shut out is clipped or batches, cools down or burning optimization on line, finishing, pack, put in storage.
Embodiment 2
In the present embodiment, low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method, produce with four strand casting machine
As a example by bar and bulk lots volume combination product, comprise the following steps:
A. ladle poured into by molten steel, is cast to direct casting in machine four strand casting machine, through tundish, crystallizer, secondary
Cooling, withdrawal straightening machine make four stream strands, the pulling rate 3.3m/min of strand, casting blank cross-section size 150mm × 150mm, cast after straightening
Base temperature reaches 1250 degree, becomes scale strand by hydraulic shear fast shut-off；
B. arrange after withdrawal straightening machine four groups of (often flowing corresponding one group) straightway short roll tables that are arranged in parallel (barrel length 300～
800mm), roller-way total length 30～45 meters, be quickly cut into continuous casting billet 18～45 meters of scales on this straightway roller-way, cut scale
The most quickly sending steel, roller table speed reaches 3m/s；By segment length's roller-way (barrel length 2100～6000mm), four streams are merged into two
Stream, roller-way total length 36～48 meters；Finally by one section of mill front roll road, two stream caster bases are sent into tandem mill and roll 8～18
Passage, uses turnout to be separated by two-wire, respectively enters 4～6 passages of a set of Continuous mill train rolling and shuts out finished product；
C. the finished product shut out is clipped or batches, cools down or burning optimization on line, finishing, pack, put in storage.
The present invention produces for iron and steel and provides the upgrading process technology of a kind of energy-saving and emission-reduction cost efficiency in summary, shortens even
Cast onto the technological process of steel rolling, it is to avoid the continuous casting billet post bake energy that conventional type of production rod iron wire rod uses short blank to bring damages
The defects such as steel impact load, production accident frequently stung by consumption, milling train, it is achieved fast continuous casting tandem rolling, and achieve type of production simultaneously
Rod iron wire rod combination product and fast quick change kind change specification, are greatly improved operating rate of rolling mill.
Claims (8)
1. a low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method, it is characterised in that the method includes following step
Rapid:
A. molten steel direct casting in conticaster, makes strand, after straightening through tundish, crystallizer, cooling twice, withdrawal straightening machine
Strand temperature reaches 1350 degree, and during with single current or double fluid rolling, in the operation of rolling, strand does not cuts off；
B. continuous casting billet is fed directly to Continuous mill train by roller-way and rolls, and i.e. sends in the single hole of same frame or diplopore and rolls, real
Show single current or continuous casting of two strands in parallel base single line in the same rack or two-wire continuous casting and rolling, shut out finished product through 7～36 passages.
C. the finished product shut out is clipped or batches, cools down or burning optimization on line, finishing, pack, put in storage.
2. low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method as claimed in claim 1, it is characterised in that adopt
During with two-wire continuous casting and rolling, after 4～22 passage tandem mill unit diplopores roll simultaneously, turnout is used to be separated by two-wire,
Respectively enter 3～14 passages of a set of Continuous mill train rolling and go out finished product.
Low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method the most according to claim 1, it is characterised in that:
Cooling twice described in step a uses feedback control, optimizes secondary cooling zone water distribution, improves strand temperature；And use short route fast
Speed send base, reduces thermal loss.
Low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method the most according to claim 1, it is characterised in that:
Arrange induction furnace, off-line or the online continuous casting billet waited between conticaster and the tandem mill described in step b described in step a to lead to
Cross after roller-way sends into induction furnace concurrent heating and roll.
Low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method the most according to claim 1, it is characterised in that:
Single current described in step b or continuous casting of two strands in parallel base single line in the same rack or two-wire continuous casting and rolling.
Low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method the most according to claim 1, it is characterised in that:
The combination or single of any two kind in shaped steel, bar, high line, bulk lots volume will be rolled into after two-wire separated time described in step c
Kind two-wire produces simultaneously.
7. a low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method, it is characterised in that the method includes following step
Rapid:
A. molten steel direct casting in conticaster, makes strand, after straightening through tundish, crystallizer, cooling twice, withdrawal straightening machine
Strand temperature reaches 1350 degree, uses multithread rolling, becomes scale strand by hydraulic shear fast shut-off；
B., continuous casting billet is quickly cut into after withdrawal straightening machine 18～45 meters of scales, and insulating roller way quickly send steel, and roller table speed reaches 3m/s,
By roller-way conveying, multithread is merged into single current or double fluid is sent into 7～36 passages of tandem mill rolling and shut out finished product；
C. the finished product shut out is clipped or batches, cools down or burning optimization on line, finishing, pack, put in storage.
Low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method the most according to claim 7, it is characterised in that:
Roller-way described in step b is with thermal insulation cover；During Multi-strand Continuous Casting, roller-way divides three sections of layouts, and the one section of roller-way being close to conticaster is
Packet (often flowing corresponding one group) the straightway short roll table that is arranged in parallel (barrel length 300～800mm), roller-way total length 30～45
Rice；Followed by segment length's roller-way (barrel length 2100～6000mm), Multi-strand Continuous Casting base is merged into two streams, roller-way total length
36～48 meters；Final stage is mill front roll road, transports two steel billets simultaneously, and roller-way total length 24～30 meters, this section of roller-way sets
Put induction heater.
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| CN201610465697.9A CN106077091A (en) | 2016-06-21 | 2016-06-21 | Low energy consumption hot continuous casting blank Direct Rolling shaped steel Bar Wire Product production method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583455A (en) * | 2017-02-07 | 2017-04-26 | 唐山市丰南区嘉谊牧栏杆厂 | Fence stake continuous casting and rolling production line based on intermediate frequency furnace smelting |
| CN106734202A (en) * | 2016-12-27 | 2017-05-31 | 中冶连铸技术工程有限责任公司 | Bar Wire Product and arrowband rolling line and its production method |
| CN107671120A (en) * | 2017-09-29 | 2018-02-09 | 四川德胜集团钒钛有限公司 | A kind of continuous casting and rolling production line |
| CN110508615A (en) * | 2019-08-30 | 2019-11-29 | 中冶赛迪工程技术股份有限公司 | A kind of high-speed bar mill two-wire rolling mill practice device and method |
| CN110653262A (en) * | 2019-09-20 | 2020-01-07 | 中冶赛迪工程技术股份有限公司 | Production line process equipment for endless rolled bar |
| CN110681697A (en) * | 2019-09-20 | 2020-01-14 | 中冶赛迪工程技术股份有限公司 | Long material production line process equipment suitable for direct rolling |
| CN111842484A (en) * | 2020-07-23 | 2020-10-30 | 东北大学 | Continuous casting slab hot core rolling method based on alternate work of two rollers |
| CN114669598A (en) * | 2022-04-07 | 2022-06-28 | 山东钢铁集团永锋临港有限公司 | Method for continuously casting 16m square billet and directly rolling bar |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734202A (en) * | 2016-12-27 | 2017-05-31 | 中冶连铸技术工程有限责任公司 | Bar Wire Product and arrowband rolling line and its production method |
| CN106583455A (en) * | 2017-02-07 | 2017-04-26 | 唐山市丰南区嘉谊牧栏杆厂 | Fence stake continuous casting and rolling production line based on intermediate frequency furnace smelting |
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| CN110508615A (en) * | 2019-08-30 | 2019-11-29 | 中冶赛迪工程技术股份有限公司 | A kind of high-speed bar mill two-wire rolling mill practice device and method |
| CN110653262A (en) * | 2019-09-20 | 2020-01-07 | 中冶赛迪工程技术股份有限公司 | Production line process equipment for endless rolled bar |
| CN110681697A (en) * | 2019-09-20 | 2020-01-14 | 中冶赛迪工程技术股份有限公司 | Long material production line process equipment suitable for direct rolling |
| CN111842484A (en) * | 2020-07-23 | 2020-10-30 | 东北大学 | Continuous casting slab hot core rolling method based on alternate work of two rollers |
| CN114669598A (en) * | 2022-04-07 | 2022-06-28 | 山东钢铁集团永锋临港有限公司 | Method for continuously casting 16m square billet and directly rolling bar |
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Application publication date: 20161109 |
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