CN106040749A - Rough rolling rhythm control method - Google Patents

Rough rolling rhythm control method Download PDF

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Publication number
CN106040749A
CN106040749A CN201610450928.9A CN201610450928A CN106040749A CN 106040749 A CN106040749 A CN 106040749A CN 201610450928 A CN201610450928 A CN 201610450928A CN 106040749 A CN106040749 A CN 106040749A
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China
Prior art keywords
slab
milling train
rolling
block
speed
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CN201610450928.9A
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Chinese (zh)
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CN106040749B (en
Inventor
王健
周政
张弛
范建坤
丁万
於小武
李继新
张明生
王章领
韩乐
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首钢京唐钢铁联合有限责任公司
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Priority to CN201610450928.9A priority Critical patent/CN106040749B/en
Publication of CN106040749A publication Critical patent/CN106040749A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby

Abstract

The invention relates to a rough rolling rhythm control method. The method comprises the following steps that the rough rolling outlet temperature of a plate blank in a rough rolling production line is controlled to the lower limit of the target temperature range; according to the rough rolling process control of the plate blank, a rolling machine R1 carries out three-pass rolling, and a rolling machine R2 carries out five-pass rolling, wherein the rolling speed of the rolling machine R1 is not higher than 1.5 m/s, the rolling speed of the rolling machine R2 is 2 m/s to 3.5 m/s, and in the rolling process, the rolling machine R1 and the rolling machine R2 carry out complete descaling processing on the plate blank; and in the second pass, the third pass and the fourth pass of rolling of the rolling machine R2, the plate blank is descaled at an inlet and an outlet of the rolling machine R2, and multi-point steel putting control over the plate blank is carried out. The rough rolling rhythm control method can effectively improve the rough rolling rhythm.

Description

A kind of roughing mill pace control method

Technical field

The present invention relates to technical field of steel rolling, particularly to a kind of roughing mill pace control method.

Background technology

Owing to similar think gauge high-grade pipe line steel, wheel steel are required to high heating-up temperature, low roughing outlet temperature, for protecting Card zerolling requirement, rough rolling step needs board briquette is reduced to 880 DEG C~920 DEG C of scopes, could meet finish rolling entrance The requirement of 900~940 DEG C, roughing region slab temperature drop needs to reach more than 280 DEG C.And when performing according to former rolling mill practice Have only to by time forward swing steel cooling to be rolled of R2 extreme trace, when setting rolling according to normal two grades, put steel time short then 120s, long then 200s.Rolling rhythm only has 12 volumes/hour.

In prior art, the rolling rhythm of roughing control method is relatively slow, causes the production capacity producing line relatively low.

Summary of the invention

The invention provides a kind of roughing mill pace control method, solve or part solves roughing in prior art and controls The rolling rhythm of method is relatively slow, causes the technical problem that the production capacity of product line is relatively low, it is achieved that be effectively improved the technology of roughing rhythm Effect.

A kind of roughing mill pace control method that the present invention provides, comprises the following steps:

The roughing outlet temperature that roughing is produced slab in line controls the lower limit at target temperature range;

By the rough rolling process control of described slab it is: milling train R1 rolls 3 passages, and milling train R2 rolls 5 passages;Wherein, in institute Stating in the 2nd, 3 and 4 passages of milling train R2 rolling, described slab carries out dephosphorization at the entrance and exit of described milling train R2;

Described slab carries out multiple spot pendulum steel control.

As preferably, the mill speed of described milling train R1 is not more than 1.5m/s;

The mill speed of described milling train R2 is 2m/s~3.5m/s.

As preferably, in the operation of rolling of described milling train R1 and described milling train R2, described slab is carried out at full de-scaling Reason.

As preferably, described roughing is produced line and is included: 4 heating furnaces are connected once with the tapping roller-way of described heating furnace Dephosphorizing machine, fixed-width pressure machine, described milling train R1, described milling train R2 and roller-way;

Described roller-way is sequentially connected with described 4 heating furnaces, dephosphorizing machine, fixed-width pressure machine, milling train R1 and described milling train R2;

Wherein, the described heating furnace that will be close to a described dephosphorizing machine is designated as No. 1 stove, will apart from a described dephosphorizing machine Remote described heating furnace is designated as No. 4 stoves, remains two described heating furnaces and is designated as No. 2 stoves and No. 3 stoves.

As preferably, the tapping interval of described 4 heating furnaces is: the afterbody of previous described slab removes described No. 1 stove After tapping roller-way, slab described in rear starts tapping.

As preferably, described slab is carried out multiple spot pendulum steel and controls, including:

First block of described slab carries out putting steel at the inlet roller way of described milling train R2;

Second block of described slab carries out putting steel at the inlet roller way of described milling train R1;

3rd block of described slab carries out putting steel at the inlet roller way of described fixed-width pressure machine;

4th block of described slab carries out putting steel at the furnace delivery table of described No. 1 stove.

As preferably, the pendulum steel time of first block of described slab is controlled according to described target temperature range;

When first block of described slab starts Speed-up Rolling at the inlet roller way of described milling train R2, second block of described slab exists The inlet roller way of described milling train R1 starts Speed-up Rolling;

When second block of described slab starts Speed-up Rolling at the inlet roller way of described milling train R1, the 3rd block of described slab exists The inlet roller way of described fixed-width pressure machine starts the fixed width that raises speed;

When the 3rd block of described slab starts to raise speed fixed width at the inlet roller way of described fixed-width pressure machine, the 4th block of described plate Base starts speed-raising advance at the tapping roller-way of described No. 1 stove.

One or more technical schemes provided herein, at least have the following technical effect that or advantage:

Owing to have employed conservative control roughing outlet temperature, rolling mode reasonable in design-milling train R1 rolls 3 passages, rolls Machine R2 rolls 5 passages, slab carries out multiple spot pendulum steel and controls.So, roughing control method in prior art is efficiently solved Rolling rhythm is relatively slow, causes the technical problem that the production capacity of product line is relatively low, it is achieved that be effectively improved the technique effect of roughing rhythm.

Accompanying drawing explanation

The flow chart of the roughing mill pace control method that Fig. 1 provides for the present invention;

Fig. 2 produces the structural representation of line for the roughing that the present invention provides.

(parts that in accompanying drawing, each label represents are followed successively by: 1 heating furnace, 2 dephosphorizing machines, 3 fixed-width pressure machines, 4 milling trains R1,5 milling train R2,6 roller-ways)

Detailed description of the invention

The embodiment of the present application provides a kind of roughing mill pace control method, solves or part solves in prior art thick The rolling rhythm rolling control method is relatively slow, causes the technical problem that the production capacity of product line is relatively low, by conservative control roughing outlet temperature Degree, rolling mode reasonable in design-milling train R1 rolls 3 passages, and milling train R2 rolls 5 passages, slab carries out multiple spot pendulum steel and controls, Achieve the technique effect being effectively improved roughing rhythm.

See accompanying drawing 1, a kind of roughing mill pace control method that the present invention provides, comprise the following steps:

S1: the roughing outlet temperature that roughing is produced slab in line controls the lower limit at target temperature range.

S2: by the rough rolling process control of slab be: milling train R1 rolls 3 passages, and milling train R2 rolls 5 passages;Wherein, milling train R1 Mill speed be not more than 1.5m/s;The mill speed of milling train R2 is 2m/s~3.5m/s, and milling train R1 and the rolling of milling train R2 During slab carried out full de-scaling process.Milling train R2 rolling the 2nd, 3 and 4 passages in, slab milling train R2 entrance and Outlet carries out dephosphorization.

S3: slab is carried out multiple spot pendulum steel and controls.

Further, seeing accompanying drawing 2, roughing is produced line and is included: 1, dephosphorizing machine 2 of 4 heating furnaces, fixed-width pressure machine 3, Milling train R1, milling train R2 and roller-way 6;Roller-way 6 be sequentially connected with 1, dephosphorizing machine 2 of 4 heating furnaces, fixed-width pressure machine 3, milling train R1 and Milling train R2;Wherein, the heating furnace 1 that will be close to a dephosphorizing machine 2 is designated as No. 1 stove, by heating furnace farthest for dephosphorizing machine 2 of distance 1 is designated as No. 4 stoves, remains two heating furnaces 1 and is designated as No. 2 stoves and No. 3 stoves.The tapping interval of 4 heating furnaces 1 is: previous slab After the tapping roller-way 6 of afterbody No. 1 stove of removal, a rear slab starts tapping.

Further, step S3 includes:

S301: the first block of slab carries out putting steel at the inlet roller way of milling train R2;And the pendulum steel time of first block of slab according to Target temperature range is controlled.

S302: the second block of slab carries out putting steel at the inlet roller way of milling train R1;When first block of slab is at the entrance of milling train R2 When roller-way starts Speed-up Rolling, second block of slab starts Speed-up Rolling at the inlet roller way of milling train R1.

S303: the three block of slab carries out putting steel at the inlet roller way of fixed-width pressure machine 3;When second block of slab is milling train R1's When inlet roller way starts Speed-up Rolling, the 3rd block of slab starts, at the inlet roller way of fixed-width pressure machine 3, the fixed width that raises speed.

S304: the four block of slab carries out putting steel at the furnace delivery table of No. 1 stove;When the 3rd block of slab is at fixed-width pressure machine 3 Inlet roller way start to raise speed fixed width time, the 4th block of slab starts speed-raising at the tapping roller-way of No. 1 stove and advances.

The roughing mill pace control method provided the application below by specific embodiment describes in detail:

Embodiment 1

S1: roughing is produced the target temperature range of slab in line is: 880 DEG C~920 DEG C, roughing outlet temperature is 880 DEG C.

S2: by the rough rolling process control of slab be: milling train R1 rolls 3 passages, and milling train R2 rolls 5 passages;Wherein, milling train R1 Mill speed be 1.4m/s;The mill speed of milling train R2 is to plate in 2.2m/s, and the operation of rolling of milling train R1 and milling train R2 Base carries out full de-scaling process.In the 2nd, 3 and 4 passages of milling train R2 rolling, slab removes at the entrance and exit of milling train R2 Phosphorus.

S3: slab is carried out multiple spot pendulum steel and controls, particularly as follows: S301, first block of slab enter at the inlet roller way of milling train R2 Row pendulum steel;And the pendulum steel time of first block of slab is controlled according to target temperature range.S302, second block of slab are at milling train R1 Inlet roller way carry out put steel;When first block of slab starts Speed-up Rolling at the inlet roller way of milling train R2, second block of slab exists The inlet roller way of milling train R1 starts Speed-up Rolling.S303, the 3rd block of slab carry out putting steel at the inlet roller way of fixed-width pressure machine 3; When second block of slab starts Speed-up Rolling at the inlet roller way of milling train R1, the 3rd block of slab is at the entrance roller of fixed-width pressure machine 3 Road starts the fixed width that raises speed.S304, the 4th block of slab carry out putting steel at the furnace delivery table of No. 1 stove;When the 3rd block of slab is in fixed width pressure The inlet roller way of power machine 3 start to raise speed fixed width time, the 4th block of slab starts speed-raising at the tapping roller-way of No. 1 stove and advances.

The rolling rhythm making roughing produce line by above-mentioned roughing mill pace control method has brought up to 20 volumes/hour.

Embodiment 2

S1: roughing is produced the target temperature range of slab in line is: 885 DEG C~910 DEG C, roughing outlet temperature is 885 DEG C.

S2: by the rough rolling process control of slab be: milling train R1 rolls 3 passages, and milling train R2 rolls 5 passages;Wherein, milling train R1 Mill speed be 1.3m/s;The mill speed of milling train R2 is to plate in 2.5m/s, and the operation of rolling of milling train R1 and milling train R2 Base carries out full de-scaling process.In the 2nd, 3 and 4 passages of milling train R2 rolling, slab removes at the entrance and exit of milling train R2 Phosphorus.

S3: slab is carried out multiple spot pendulum steel and controls, particularly as follows: S301, first block of slab enter at the inlet roller way of milling train R2 Row pendulum steel;And the pendulum steel time of first block of slab is controlled according to target temperature range.S302, second block of slab are at milling train R1 Inlet roller way carry out put steel;When first block of slab starts Speed-up Rolling at the inlet roller way of milling train R2, second block of slab exists The inlet roller way of milling train R1 starts Speed-up Rolling.S303, the 3rd block of slab carry out putting steel at the inlet roller way of fixed-width pressure machine 3; When second block of slab starts Speed-up Rolling at the inlet roller way of milling train R1, the 3rd block of slab is at the entrance roller of fixed-width pressure machine 3 Road starts the fixed width that raises speed.S304, the 4th block of slab carry out putting steel at the furnace delivery table of No. 1 stove;When the 3rd block of slab is in fixed width pressure The inlet roller way of power machine 3 start to raise speed fixed width time, the 4th block of slab starts speed-raising at the tapping roller-way of No. 1 stove and advances.

The rolling rhythm making roughing produce line by above-mentioned roughing mill pace control method has brought up to 20 volumes/hour.

Embodiment 3

S1: roughing is produced the target temperature range of slab in line is: 888 DEG C~915 DEG C, roughing outlet temperature is 888 DEG C.

S2: by the rough rolling process control of slab be: milling train R1 rolls 3 passages, and milling train R2 rolls 5 passages;Wherein, milling train R1 Mill speed be 1.2m/s;The mill speed of milling train R2 is to plate in 2.8m/s, and the operation of rolling of milling train R1 and milling train R2 Base carries out full de-scaling process.In the 2nd, 3 and 4 passages of milling train R2 rolling, slab removes at the entrance and exit of milling train R2 Phosphorus.

S3: slab is carried out multiple spot pendulum steel and controls, particularly as follows: S301, first block of slab enter at the inlet roller way of milling train R2 Row pendulum steel;And the pendulum steel time of first block of slab is controlled according to target temperature range.S302, second block of slab are at milling train R1 Inlet roller way carry out put steel;When first block of slab starts Speed-up Rolling at the inlet roller way of milling train R2, second block of slab exists The inlet roller way of milling train R1 starts Speed-up Rolling.S303, the 3rd block of slab carry out putting steel at the inlet roller way of fixed-width pressure machine 3; When second block of slab starts Speed-up Rolling at the inlet roller way of milling train R1, the 3rd block of slab is at the entrance roller of fixed-width pressure machine 3 Road starts the fixed width that raises speed.S304, the 4th block of slab carry out putting steel at the furnace delivery table of No. 1 stove;When the 3rd block of slab is in fixed width pressure The inlet roller way of power machine 3 start to raise speed fixed width time, the 4th block of slab starts speed-raising at the tapping roller-way of No. 1 stove and advances.

The rolling rhythm making roughing produce line by above-mentioned roughing mill pace control method has brought up to 21 volumes/hour.

Embodiment 4

S1: roughing is produced the target temperature range of slab in line is: 890 DEG C~917 DEG C, roughing outlet temperature is 890 DEG C.

S2: by the rough rolling process control of slab be: milling train R1 rolls 3 passages, and milling train R2 rolls 5 passages;Wherein, milling train R1 Mill speed be 1.0m/s;The mill speed of milling train R2 is to plate in 3.2m/s, and the operation of rolling of milling train R1 and milling train R2 Base carries out full de-scaling process.In the 2nd, 3 and 4 passages of milling train R2 rolling, slab removes at the entrance and exit of milling train R2 Phosphorus.

S3: slab is carried out multiple spot pendulum steel and controls, particularly as follows: S301, first block of slab enter at the inlet roller way of milling train R2 Row pendulum steel;And the pendulum steel time of first block of slab is controlled according to target temperature range.S302, second block of slab are at milling train R1 Inlet roller way carry out put steel;When first block of slab starts Speed-up Rolling at the inlet roller way of milling train R2, second block of slab exists The inlet roller way of milling train R1 starts Speed-up Rolling.S303, the 3rd block of slab carry out putting steel at the inlet roller way of fixed-width pressure machine 3; When second block of slab starts Speed-up Rolling at the inlet roller way of milling train R1, the 3rd block of slab is at the entrance roller of fixed-width pressure machine 3 Road starts the fixed width that raises speed.S304, the 4th block of slab carry out putting steel at the furnace delivery table of No. 1 stove;When the 3rd block of slab is in fixed width pressure The inlet roller way of power machine 3 start to raise speed fixed width time, the 4th block of slab starts speed-raising at the tapping roller-way of No. 1 stove and advances.

The rolling rhythm making roughing produce line by above-mentioned roughing mill pace control method has brought up to 21 volumes/hour.

Embodiment 5

S1: roughing is produced the target temperature range of slab in line is: 895 DEG C~905 DEG C, roughing outlet temperature is 895 DEG C.

S2: by the rough rolling process control of slab be: milling train R1 rolls 3 passages, and milling train R2 rolls 5 passages;Wherein, milling train R1 Mill speed be 1.1m/s;The mill speed of milling train R2 is to plate in 3.4m/s, and the operation of rolling of milling train R1 and milling train R2 Base carries out full de-scaling process.In the 2nd, 3 and 4 passages of milling train R2 rolling, slab removes at the entrance and exit of milling train R2 Phosphorus.

S3: slab is carried out multiple spot pendulum steel and controls, particularly as follows: S301, first block of slab enter at the inlet roller way of milling train R2 Row pendulum steel;And the pendulum steel time of first block of slab is controlled according to target temperature range.S302, second block of slab are at milling train R1 Inlet roller way carry out put steel;When first block of slab starts Speed-up Rolling at the inlet roller way of milling train R2, second block of slab exists The inlet roller way of milling train R1 starts Speed-up Rolling.S303, the 3rd block of slab carry out putting steel at the inlet roller way of fixed-width pressure machine 3; When second block of slab starts Speed-up Rolling at the inlet roller way of milling train R1, the 3rd block of slab is at the entrance roller of fixed-width pressure machine 3 Road starts the fixed width that raises speed.S304, the 4th block of slab carry out putting steel at the furnace delivery table of No. 1 stove;When the 3rd block of slab is in fixed width pressure The inlet roller way of power machine 3 start to raise speed fixed width time, the 4th block of slab starts speed-raising at the tapping roller-way of No. 1 stove and advances.

The rolling rhythm making roughing produce line by above-mentioned roughing mill pace control method has brought up to 22 volumes/hour.

Knowable to above-mentioned 5 embodiments, the application provide roughing mill pace control method by reduce tapping temperature technology, Multiple spot pendulum steel, milling train R1, the restriction skill of milling train R2 mill speed is carried out at heating furnace 1, fixed-width pressure machine 3, milling train R1, milling train R2 Art, the exploitation of double technique of scale removal of milling train R2 makes rolling rhythm bring up to 20-22 volume/hour from 12 volumes/hour.

One or more technical schemes provided herein, at least have the following technical effect that or advantage:

Owing to have employed conservative control roughing outlet temperature, rolling mode reasonable in design-milling train R1 rolls 3 passages, rolls Machine R2 rolls 5 passages, slab carries out multiple spot pendulum steel and controls.So, roughing control method in prior art is efficiently solved Rolling rhythm is relatively slow, causes the technical problem that the production capacity of product line is relatively low, it is achieved that be effectively improved the technique effect of roughing rhythm.

Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not limited to this Bright, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in the present invention Protection domain within.

Claims (7)

1. a roughing mill pace control method, it is characterised in that comprise the following steps:
The roughing outlet temperature that roughing is produced slab in line controls the lower limit at target temperature range;
By the rough rolling process control of described slab it is: milling train R1 rolls 3 passages, and milling train R2 rolls 5 passages;Wherein, roll described In 2nd, 3 and 4 passages of machine R2 rolling, described slab carries out dephosphorization at the entrance and exit of described milling train R2;
Described slab carries out multiple spot pendulum steel control.
2. roughing mill pace control method as claimed in claim 1, it is characterised in that
The mill speed of described milling train R1 is not more than 1.5m/s;
The mill speed of described milling train R2 is 2m/s~3.5m/s.
3. roughing mill pace control method as claimed in claim 1, it is characterised in that
In the operation of rolling of described milling train R1 and described milling train R2, described slab is carried out full de-scaling process.
4. roughing mill pace control method as claimed in claim 1, it is characterised in that
Described roughing is produced line and is included: a dephosphorizing machine that 4 heating furnaces are connected with the tapping roller-way of described heating furnace, fixed width pressure Power machine, described milling train R1, described milling train R2 and roller-way;
Described roller-way is sequentially connected with described 4 heating furnaces, dephosphorizing machine, fixed-width pressure machine, a milling train R1 and described milling train R2;
Wherein, the described heating furnace that will be close to a described dephosphorizing machine is designated as No. 1 stove, by farthest apart from a described dephosphorizing machine Described heating furnace is designated as No. 4 stoves, remains two described heating furnaces and is designated as No. 2 stoves and No. 3 stoves.
5. roughing mill pace control method as claimed in claim 4, it is characterised in that
The tapping interval of described 4 heating furnaces is: after the afterbody of previous described slab removes the tapping roller-way of described No. 1 stove, after Slab described in one starts tapping.
6. roughing mill pace control method as claimed in claim 4, it is characterised in that described slab is carried out multiple spot pendulum steel control System, including:
First block of described slab carries out putting steel at the inlet roller way of described milling train R2;
Second block of described slab carries out putting steel at the inlet roller way of described milling train R1;
3rd block of described slab carries out putting steel at the inlet roller way of described fixed-width pressure machine;
4th block of described slab carries out putting steel at the furnace delivery table of described No. 1 stove.
7. roughing mill pace control method as claimed in claim 6, it is characterised in that
The pendulum steel time of first block of described slab is controlled according to described target temperature range;
When first block of described slab starts Speed-up Rolling at the inlet roller way of described milling train R2, second block of described slab is described The inlet roller way of milling train R1 starts Speed-up Rolling;
When second block of described slab starts Speed-up Rolling at the inlet roller way of described milling train R1, the 3rd block of described slab is described The inlet roller way of fixed-width pressure machine starts the fixed width that raises speed;
When the 3rd block of described slab starts to raise speed fixed width at the inlet roller way of described fixed-width pressure machine, the 4th block of described slab exists The tapping roller-way of described No. 1 stove starts speed-raising and advances.
CN201610450928.9A 2016-06-21 2016-06-21 A kind of roughing mill pace control method CN106040749B (en)

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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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CN110773570A (en) * 2019-09-20 2020-02-11 南京钢铁股份有限公司 Method for improving rolling rhythm of 5m rolling mill

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CN103866204A (en) * 2014-02-27 2014-06-18 济钢集团有限公司 Large-strain X80 dual-phase steel plate produced by virtue of process at low temperature and under high pressure
CN105478472A (en) * 2014-09-19 2016-04-13 鞍钢股份有限公司 Hot rolling method for wide and thin size high-strength cold-rolled base plate for automobile
CN104438319A (en) * 2014-10-13 2015-03-25 首钢京唐钢铁联合有限责任公司 Rough rolling speed increasing method
CN104550279A (en) * 2014-11-26 2015-04-29 南京钢铁股份有限公司 De-scaling method for steel plate at TMCP delivery state
CN104668287A (en) * 2014-12-09 2015-06-03 攀钢集团攀枝花钢钒有限公司 Universal steel rail rolling mill device and steel rail rolling method
CN104726665A (en) * 2015-04-03 2015-06-24 首钢总公司 Hot rolling technique of X80 pipeline steel coil plate
CN105039870A (en) * 2015-08-31 2015-11-11 山东钢铁股份有限公司 X80M pipeline steel resistant to low temperature and large in strain and manufacturing method and application of X80M pipeline steel
CN105088096A (en) * 2015-08-31 2015-11-25 山东钢铁股份有限公司 X80 pipeline steel with high stress ratio and high arrest toughness and preparation method and application of X80 pipeline steel

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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
CN106424159B (en) * 2016-11-18 2019-07-23 首钢京唐钢铁联合有限责任公司 A method of promoting Strip Roughing rhythm
CN107309278A (en) * 2017-07-07 2017-11-03 首钢京唐钢铁联合有限责任公司 A kind of method of lift line steel production efficiency
CN110773570A (en) * 2019-09-20 2020-02-11 南京钢铁股份有限公司 Method for improving rolling rhythm of 5m rolling mill

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