CN107309278A - A kind of method of lift line steel production efficiency - Google Patents
A kind of method of lift line steel production efficiency Download PDFInfo
- Publication number
- CN107309278A CN107309278A CN201710552528.3A CN201710552528A CN107309278A CN 107309278 A CN107309278 A CN 107309278A CN 201710552528 A CN201710552528 A CN 201710552528A CN 107309278 A CN107309278 A CN 107309278A
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- slab
- roll mill
- mill
- production efficiency
- line steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a kind of method of lift line steel production efficiency, in the production process applied to hot rolling pipe line steel, including：In slab after heating stove heat, pendulum steel processing is carried out to the slab in the outlet of the heating furnace；After the slab enters descaling mill, the descaling mill is controlled to carry out de-scaling processing to the slab；After the slab enters constant width machine, the constant width machine is controlled to be modified the width of the slab；After the slab is reached at roll mill, the roll mill is controlled to carry out de-scaling processing to the slab.The present invention solves the technical problem for the low production efficiency that there is high-grade pipe line steel in the prior art, realizes the technique effect for the production efficiency for improving high-grade pipe line steel.
Description
Technical field
The present invention relates to hot rolling technical field of steel rolling, more particularly to a kind of method of lift line steel production efficiency.
Background technology
The production technology of hot rolling pipe line steel has heating furnace tapping temperature higher, the characteristics of entry temperature at finishing is relatively low, example
Such as, the X70 steel grades of 16.87 thickness specifications often produced, target temperature of coming out of the stove is 1180 DEG C, the target temperature of entry temperature at finishing
Degree requires 925 DEG C or so, and roughing region process temperature drop is up to 255 DEG C or so, and the normal temperature drop in steel grade roughing region is on 200 DEG C of left sides
The right side, therefore need to carry out pendulum steel control temperature in roughing region in the case of normal production, such steel grade is given birth under normal circumstances
Production in roughing region, it is necessary to put steel about 60-120s, and this is to producing such steel grade to production efficiency, and yield has considerable influence.
The content of the invention
The embodiment of the present application is solved and existed in the prior art by providing a kind of method of lift line steel production efficiency
The technical problem of the low production efficiency of high-grade pipe line steel, realizes the technology effect for the production efficiency for improving high-grade pipe line steel
Really.
The application provides following technical scheme by the embodiment of the application：
In a kind of method of lift line steel production efficiency, the production process applied to hot rolling pipe line steel, including：
In slab after heating stove heat, pendulum steel processing is carried out to the slab in the outlet of the heating furnace；
After the slab enters descaling mill, the descaling mill is controlled to carry out de-scaling processing to the slab；
After the slab enters constant width machine, the constant width machine is controlled to be modified the width of the slab；
After the slab is reached at roll mill, the roll mill is controlled to carry out de-scaling processing to the slab.
Preferably, the outlet in the heating furnace carries out pendulum steel processing to the slab, including：
With a default pendulum steel speed, pendulum steel processing is carried out to the slab in the outlet of the heating furnace, wherein, it is described pre-
If the span for putting steel speed is 0.6m/s~0.8m/s.
Preferably, the control descaling mill carries out de-scaling processing to the slab, including：
First group of sparge pipe and second group of sparge pipe is controlled to be sprayed water simultaneously to the slab, wherein, first group of water spray
Pipe and second group of sparge pipe belong to the descaling mill, and first group of sparge pipe is located above the slab, and described the
Two groups of sparge pipes are located above the slab.
Preferably, the constant width machine is controlled to enter the width of the slab after the slab enters constant width machine described
Before row amendment, in addition to：
When the slab reaches the porch of the constant width machine, pendulum steel processing is carried out to the slab.
Preferably, it is described after the slab is reached at roll mill, control the roll mill to carry out de-scaling to the slab
Processing, including：
When the slab reaches the porch of the first roll mill, control is located at the first of the entrance of first roll mill
Descaling device carries out de-scaling processing to the slab；
When the slab reaches the exit of the first roll mill, control is located at the second of the outlet of first roll mill
Descaling device carries out de-scaling processing to the slab；
When the slab reaches the porch of the second roll mill, control is located at the 3rd of the entrance of second roll mill
Descaling device carries out de-scaling processing to the slab；
When the slab reaches the exit of the second roll mill, control is located at the 4th of the outlet of second roll mill
Descaling device carries out de-scaling processing to the slab.
Preferably, the method for the lift line steel production efficiency, in addition to：
After the slab enters at the roll mill, control the roll mill using default rolling mill practice to the slab
Rolled.
Preferably, the control roll mill is rolled using default rolling mill practice to the slab, including：
The first roll mill is controlled to carry out three passes to the slab；And/or
The second roll mill is controlled to carry out five passes to the slab.
Preferably, the control roll mill is rolled using default rolling mill practice to the slab, in addition to：
Reduce the roller table speed of the connection roller-way between first roll mill and second roll mill；And/or
Reduce the mill speed of first roll mill and second roll mill.
Preferably, the roller-way speed of the connection roller-way reduced between first roll mill and second roll mill
Degree, including：
The roller table speed of connection roller-way between first roll mill and second roll mill is reduced to 3.3m/s
~3.7m/s.
Preferably, the mill speed of the reduction by first roll mill and second roll mill, including：
The mill speed of first roll mill and second roll mill is reduced to 2.3m/s~2.7m/s.
The one or more technical schemes provided in the embodiment of the present application, have at least the following technical effects or advantages：
In the embodiment of the present application, a kind of method of lift line steel production efficiency is disclosed, applied to hot rolling pipe line steel
Production process in, including：In slab after heating stove heat, pendulum steel is carried out to the slab in the outlet of the heating furnace
Processing；After the slab enters descaling mill, the descaling mill is controlled to carry out de-scaling processing to the slab；Enter in the slab
Enter after constant width machine, control the constant width machine to be modified the width of the slab；After the slab is reached at roll mill, control
Make the roll mill and de-scaling processing is carried out to the slab.Present application addresses the life that there is high-grade pipe line steel in the prior art
The low technical problem of efficiency is produced, the technique effect for the production efficiency for improving high-grade pipe line steel is realized.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this
For the those of ordinary skill of field, on the premise of not paying creative work, it can also obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the schematic diagram of the part producing line of hot rolling pipe line steel in the embodiment of the present application；
Fig. 2 is a kind of flow chart of the method for lift line steel production efficiency in the embodiment of the present application.
Embodiment
The embodiment of the present application is solved and existed in the prior art by providing a kind of method of lift line steel production efficiency
The technical problem of the low production efficiency of high-grade pipe line steel, realizes the technology effect for the production efficiency for improving high-grade pipe line steel
Really.
The technical scheme of the embodiment of the present application is in order to solve the above technical problems, general thought is as follows：
In a kind of method of lift line steel production efficiency, the production process applied to hot rolling pipe line steel, including：In slab
After heating stove heat, pendulum steel processing is carried out to the slab in the outlet of the heating furnace；Enter de-scaling in the slab
After machine, the descaling mill is controlled to carry out de-scaling processing to the slab；After the slab enters constant width machine, the fixed width is controlled
Machine is modified to the width of the slab；After the slab is reached at roll mill, the roll mill is controlled to the slab
Carry out de-scaling processing.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and specific embodiment to upper
Technical scheme is stated to be described in detail.
Illustrate first, herein presented term "and/or", only a kind of incidence relation for describing affiliated partner, table
Show there may be three kinds of relations, for example, A and/or B, can be represented：Individualism A, while there is A and B, individualism B this three
The situation of kind.In addition, character "/" herein, it is a kind of relation of "or" to typically represent forward-backward correlation object.
Embodiment one
Present embodiments provide a kind of method of lift line steel production efficiency, the production process applied to hot rolling pipe line steel
In, as shown in figure 1, the part producing line of the hot rolling pipe line steel includes：Heating furnace, descaling mill, constant width machine, roll mill, wherein
Roll mill includes two machines, respectively the first roll mill and the second roll mill.Slab can be passed sequentially through after heating heating
Descaling mill, constant width machine, the first roll mill and the second roll mill.Wherein, described slab is to be used to produce the high-grade pipe lines such as X70
The slab of steel, that is to say, that the application is mainly used for the high-grade pipe line steel production efficiencys such as lifting X70.
Specifically, as shown in Fig. 2 the method for this lift line steel production efficiency, including：
Step S101：In slab after heating stove heat, pendulum steel processing is carried out to slab in the outlet of heating furnace.
In specific implementation process, pendulum steel can be carried out to slab in the outlet of heating furnace using a default pendulum steel speed
Processing, so that temperature control is carried out to slab, wherein, the span of the default pendulum steel speed is 0.6m/s~0.8m/s, example
Such as, the default pendulum steel speed can be：0.6m/s or 0.7m/s or 0.8m/s, etc., preferred 0.7m/s herein.
Step S102：After slab enters descaling mill, control descaling mill carries out de-scaling processing to slab.
In specific implementation process, no matter the squama on slab (i.e.：Iron oxide) content how much, enter descaling mill in slab
Afterwards, descaling mill can be opened, and controls descaling mill to carry out de-scaling processing to slab.
In specific implementation process, the descaling mill can be：Thick descaling mill.
As a kind of optional embodiment, step S102, including：
After slab enters descaling mill, first group of sparge pipe of control and second group of sparge pipe are sprayed water to slab simultaneously, wherein,
First group of sparge pipe and second group of sparge pipe belong to descaling mill, and first group of sparge pipe is located above slab, second group of sparge pipe
Above slab.
In specific implementation process, descaling mill has two groups of sparge pipes, and every group of sparge pipe includes two row's sparge pipes, one group again
Sparge pipe is located above slab, and another group of sparge pipe is located at below slab, when controlling descaling mill to carry out de-scaling processing to slab,
This two groups of sparge pipes can be opened simultaneously so that the upper and lower surface that this two groups of sparge pipes are directed at slab simultaneously is sprayed
Water, so, not only can wash away the squama of steel slab surface (i.e.：Iron oxide), slab can also be cooled.
Step S103：After slab enters constant width machine, control constant width machine is modified to the width of slab.
As a kind of optional embodiment, before step S103, in addition to：The porch of constant width machine is reached in slab
When, pendulum steel processing is carried out to slab.
In specific implementation process, when slab reaches the porch of constant width machine, can by descaling mill and localization machine it
Between track to slab carry out pendulum steel processing so that further reduce slab temperature.Wherein, pendulum steel speed be 0.6m/s~
0.8m/s, for example, 0.6m/s or 0.7m/s or 0.8m/s, etc., preferred 0.7m/s herein.
In specific implementation process, when performing step S103, no matter whether the width of slab reaches requirement, can control
Constant width machine processed is modified to the width of slab, so, not only ensure that the width of slab meets the requirements, while can also enter one
The temperature of step reduction slab.
Step S104：After slab is reached at roll mill, controlled rolling machine carries out de-scaling processing to slab.
As a kind of optional embodiment, step S104, including：
When slab reaches the porch of the first roll mill, first descaling device of the control positioned at the entrance of the first roll mill
De-scaling processing is carried out to slab；
When slab reaches the exit of the first roll mill, second descaling device of the control positioned at the outlet of the first roll mill
De-scaling processing is carried out to slab；
When slab reaches the porch of the second roll mill, threeth descaling device of the control positioned at the entrance of the second roll mill
De-scaling processing is carried out to slab；
When slab reaches the exit of the second roll mill, fourth descaling device of the control positioned at the outlet of the second roll mill
De-scaling processing is carried out to slab.
In specific implementation process, slab can pass through localization machine and first when reaching the porch of the first roll mill
Track between roll mill carries out pendulum steel processing to slab, so as to further reduce the temperature of slab.Wherein, pendulum steel speed is
0.6m/s~0.8m/s, for example, 0.6m/s or 0.7m/s or 0.8m/s, etc., preferred 0.7m/s herein.
In specific implementation process, a descaling device is each provided with the porch and exit of the first roll mill,
When slab reaches the porch of the first roll mill, the first descaling device positioned at the first roll mill porch can be controlled to slab
De-scaling processing is carried out, when slab reaches the exit of the first roll mill, the positioned at the first roll mill exit can be controlled
Two descaling devices carry out de-scaling processing to slab, so as to further reduce the temperature of slab.
In specific implementation process, slab when reaching the porch of the second roll mill, can by the first roll mill and
Track between second roll mill carries out pendulum steel processing to slab, so as to further reduce the temperature of slab.Wherein, steel speed is put
For 0.6m/s~0.8m/s, for example, 0.6m/s or 0.7m/s or 0.8m/s, etc., preferred 0.7m/s herein.
In specific implementation process, a descaling device is respectively also equipped with the porch and exit of the second roll mill,
When slab reaches the porch of the second roll mill, the 3rd descaling device positioned at the second roll mill porch can be controlled to plate
Base carries out de-scaling processing, when slab reaches the exit of the second roll mill, can control positioned at the second roll mill exit
4th descaling device carries out de-scaling processing to slab, so as to further reduce the temperature of slab.
As a kind of optional embodiment, the method for the lift line steel production efficiency, in addition to：
After slab enters at roll mill, controlled rolling machine is rolled using default rolling mill practice to slab.
In specific implementation process, the controlled rolling machine is rolled using default rolling mill practice to slab, including：Control
Make the first roll mill and three passes carried out to slab, and/or, the second roll mill of control carries out five passes to slab.This
Sample, can suitably increase the roughing region slab residence time, contribute to the further cooling of slab.
As a kind of optional embodiment, the controlled rolling machine is rolled using default rolling mill practice to slab, also
Including：
Reduce the roller table speed of the connection roller-way between the first roll mill and the second roll mill；And/or
Reduce the mill speed of the first roll mill and the second roll mill.
, can be by the roller table speed of the connection roller-way between the first roll mill and the second roll mill in specific implementation process
3.3m/s~3.7m/s is reduced to, for example, 3.3m/s or 3.4m/s or 3.5m/s or 3.6m/s or 3.7m/s, etc., this
Locate preferred 3.5m/s.
In specific implementation process, the mill speed of the first roll mill and the second roll mill can be reduced to 2.3m/s~
2.7m/s, for example, 2.3m/s or 2.4m/s or 2.5m/s or 2.6m/s or 2.7m/s, etc., preferred 2.5m/s herein.
Herein, reduction the first roll mill and the second roll mill between connection roller-way roller table speed and the first roll mill and
The mill speed of second roll mill, can suitably increase the de-scaling cooling down time of slab, contribute to the further drop of slab
Temperature.
In specific implementation process, the method for the lift line steel production efficiency can be designed to program code, and
In the control system for being added to the production line of hot rolling pipe line steel, and provide in the control system UI (User Interface,
User interface) so that operating personnel can provide the UI interfaces and above-mentioned each pendulum steel loop section, de-scaling link are controlled, simultaneously
The roller table speed and the first roll mill and second of connection roller-way between first roll mill and the second roll mill can also be rolled
The mill speed of machine processed is controlled.
This method have cured a series of measures, it is to avoid tapping gap is uneven, operating time difference between teams and groups, between personnel
The problems such as big.
In actual production try out this method, can by during producing line machine yield lifted 120 tons/when or so, greatly improve
Producing line production capacity.
Compared with prior art, the present invention in strip in roughing region cooling rate faster, X70 etc. can be lifted high-level
Pipe line steel production efficiency, so as to improve producing line production capacity.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
In the embodiment of the present application, a kind of method of lift line steel production efficiency is disclosed, applied to hot rolling pipe line steel
Production process in, including：In slab after heating stove heat, pendulum steel is carried out to the slab in the outlet of the heating furnace
Processing；After the slab enters descaling mill, the descaling mill is controlled to carry out de-scaling processing to the slab；Enter in the slab
Enter after constant width machine, control the constant width machine to be modified the width of the slab；After the slab is reached at roll mill, control
Make the roll mill and de-scaling processing is carried out to the slab.Present application addresses the life that there is high-grade pipe line steel in the prior art
The low technical problem of efficiency is produced, the technique effect for the production efficiency for improving high-grade pipe line steel is realized.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
1. in a kind of method of lift line steel production efficiency, the production process applied to hot rolling pipe line steel, it is characterised in that bag
Include：
In slab after heating stove heat, pendulum steel processing is carried out to the slab in the outlet of the heating furnace；
After the slab enters descaling mill, the descaling mill is controlled to carry out de-scaling processing to the slab；
After the slab enters constant width machine, the constant width machine is controlled to be modified the width of the slab；
After the slab is reached at roll mill, the roll mill is controlled to carry out de-scaling processing to the slab.
2. the method for lift line steel production efficiency as claimed in claim 1, it is characterised in that described in the heating furnace
Outlet carries out pendulum steel processing to the slab, including：
With a default pendulum steel speed, pendulum steel processing is carried out to the slab in the outlet of the heating furnace, wherein, the default pendulum
The span of steel speed is 0.6m/s~0.8m/s.
3. the method for lift line steel production efficiency as claimed in claim 1, it is characterised in that the control descaling mill
De-scaling processing is carried out to the slab, including：
Control first group of sparge pipe and second group of sparge pipe to be sprayed water simultaneously to the slab, wherein, first group of sparge pipe and
Second group of sparge pipe belongs to the descaling mill, and first group of sparge pipe is located above the slab, described second group
Sparge pipe is located above the slab.
4. the method for lift line steel production efficiency as claimed in claim 1, it is characterised in that enter described in the slab
Enter after constant width machine, before the control constant width machine is modified to the width of the slab, in addition to：
When the slab reaches the porch of the constant width machine, pendulum steel processing is carried out to the slab.
5. the method for lift line steel production efficiency as claimed in claim 1, it is characterised in that described to be reached in the slab
After at roll mill, the roll mill is controlled to carry out de-scaling processing to the slab, including：
When the slab reaches the porch of the first roll mill, first de-scaling of the control positioned at the entrance of first roll mill
Device carries out de-scaling processing to the slab；
When the slab reaches the exit of the first roll mill, second de-scaling of the control positioned at the outlet of first roll mill
Device carries out de-scaling processing to the slab；
When the slab reaches the porch of the second roll mill, threeth de-scaling of the control positioned at the entrance of second roll mill
Device carries out de-scaling processing to the slab；
When the slab reaches the exit of the second roll mill, fourth de-scaling of the control positioned at the outlet of second roll mill
Device carries out de-scaling processing to the slab.
6. the method for lift line steel production efficiency as claimed in claim 1, it is characterised in that the lift line steel production
The method of efficiency, in addition to：
After the slab enters at the roll mill, the roll mill is controlled to be carried out using default rolling mill practice to the slab
Rolling.
7. the method for lift line steel production efficiency as claimed in claim 6, it is characterised in that the control roll mill
The slab is rolled using default rolling mill practice, including：
The first roll mill is controlled to carry out three passes to the slab；And/or
The second roll mill is controlled to carry out five passes to the slab.
8. the method for lift line steel production efficiency as claimed in claim 7, it is characterised in that the control roll mill
The slab is rolled using default rolling mill practice, in addition to：
Reduce the roller table speed of the connection roller-way between first roll mill and second roll mill；And/or
Reduce the mill speed of first roll mill and second roll mill.
9. the method for lift line steel production efficiency as claimed in claim 8, it is characterised in that the reduction described first is rolled
The roller table speed of connection roller-way between machine processed and second roll mill, including：
By the roller table speed of the connection roller-way between first roll mill and second roll mill be reduced to 3.3m/s~
3.7m/s。
10. the method for lift line steel production efficiency as claimed in claim 8, it is characterised in that the reduction described first
The mill speed of roll mill and second roll mill, including：
The mill speed of first roll mill and second roll mill is reduced to 2.3m/s~2.7m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710552528.3A CN107309278A (en) | 2017-07-07 | 2017-07-07 | A kind of method of lift line steel production efficiency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710552528.3A CN107309278A (en) | 2017-07-07 | 2017-07-07 | A kind of method of lift line steel production efficiency |
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Family
ID=60177664
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4598377A (en) * | 1981-10-05 | 1986-07-01 | Mitsubishi Denki Kabushiki Kaisha | Method of controlling the rolling efficiency in hot rolling |
| JP2003225702A (en) * | 2002-02-04 | 2003-08-12 | Jfe Steel Kk | Mill pacing method in hot rolling line |
| CN106040749A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Rough rolling rhythm control method |
| CN106424159A (en) * | 2016-11-18 | 2017-02-22 | 首钢京唐钢铁联合有限责任公司 | Method for improving rough rolling rhythm of strip steel |
| CN106583465A (en) * | 2016-11-18 | 2017-04-26 | 首钢京唐钢铁联合有限责任公司 | Method and device for increasing hot rolling speed of ferrite |
-
2017
- 2017-07-07 CN CN201710552528.3A patent/CN107309278A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4598377A (en) * | 1981-10-05 | 1986-07-01 | Mitsubishi Denki Kabushiki Kaisha | Method of controlling the rolling efficiency in hot rolling |
| JP2003225702A (en) * | 2002-02-04 | 2003-08-12 | Jfe Steel Kk | Mill pacing method in hot rolling line |
| CN106040749A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Rough rolling rhythm control method |
| CN106424159A (en) * | 2016-11-18 | 2017-02-22 | 首钢京唐钢铁联合有限责任公司 | Method for improving rough rolling rhythm of strip steel |
| CN106583465A (en) * | 2016-11-18 | 2017-04-26 | 首钢京唐钢铁联合有限责任公司 | Method and device for increasing hot rolling speed of ferrite |
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Application publication date: 20171103 |