efficiency and raise overall productivity. - · PDF filein the end-less rolling line of the...

Printed byFuji Xerox Service Link Co., Ltd.https://www.fxsvl.co.jp/

HOT STRIP MILL

A MHMM Rolling Technology primetals.com

Primetals Technologies Japan, Ltd.A joint venture of Siemens, Mitsubishi Heavy Industries and Partners

Tokyo office: Shintamachi Bldg. 34-6, Shiba 5-Chome, Minato-ku, Tokyo 108-0014, Japan Phone: +81-3-5765-5231

Hiroshima Works: 6-22, Kanonshin-Machi, 4-Chome, Nishi-ku, Hiroshima 733-8553, Japan Phone: +81-82-291-2181 primetals.com

Brochure No. : June 2015/T04-0-N069-L4-P-V1-EN Printed in Japan © 2015 Primetals Technologies Ltd. All rights reserved.

The information (including, e.g., figures and numbers) provided

in this document contains merely general descriptions or

characteristics of performance based on estimates and

assumptions which have not been verified.

It is no representation, does not constitute and/or evidence a

contract or an offer to enter into a contract to any extent and is

not binding upon the parties. Any obligation to provide and/or

demonstrate respective characteristics shall only exist if expressly

agreed in the terms of the contract.

These estimates and assumptions have to be analyzed on a case-

to-case basis and might change as a result of further product

development.

Primetals Technologies excludes any liability whatsoever under

or in connection with any provided information, estimates

and assumptions. The provided information, estimates and

assumptions shall be without prejudice to any possible future

offer and/or contract.

Any use of information provided by Primetals Technologies to the

recipient shall be subject to applicable confidentiality obligations

and for the own convenience of and of the sole risk of the

recipient.

1 2

Over the past 50 years, Mitsubishi Heavy

Industries and Hitachi have individually

worked with the world steel industry

supplying advanced technologies, increasing

production and improving quality. In the face

of increased global competition, the steel

industry divisions of Mitsubishi Heavy

Industries and Hitachi jointed on October

2nd, 2000 and established a joint venture to

provide superior service and products.

Primetals Technologies Japan, Ltd. (PTJ) has

developed new key technologies for the hot

strip mill and has massive experiences not

only in the conventional rolling line but also

in the end-less rolling line of the hot strip mill.

PTJ can supply top-notch rolling technologies

as a power full partner for you!

...to increase product quality, conserve energy,

reduce labor costs, boost output, achieve greater

efficiency and raise overall productivity.

HOT STRIP MILL QUALITYADVANCING TECHNOLOGIES

Semi-Endless Rolling

Endless Rolling

Conventional Rolling

1) Slab Sizing Press

Features Higher slab width reduction up to

350mm

Various pressing patterns for

decrease of croploss

Short shutdown for installation to

existing plant

2) Roughing Mill

Main EquipmentEdger

Roughing mill

Hydraulic AWC system

Hydraulic AGC system

FeaturesHigher reduction of width and

thickness

Higher width and thickness accuracy

Passline adjustment device for stable

rolling operation

Quick roll change

3) Advanced Coil Box

Features Mandrelless transfer with side heat

shields

Prevention of temperature drop at

coil inner wrap and coil edge

Buffer function especially for endless

rolling

4) Crop Shear

Features Differential speed rotary crop shear

Quick knife changing

5) Descaler

Main Equipment Roughing scale breaker

Finishing scale breaker

Features High pressure descaler up to 400

MPa

Easy maintenance

6) Finishing Mill

Main EquipmentAdvanced pair cross mill (PC mill)

Mill stabilizer device (MSD)

Looper shape meter (LSM)

WR shift mill

Hydraulic AGC system

FeaturesHigher reduction rolling

Powerful and accurate strip crown &

Schedule free rolling

Extension of roll change interval

Quick roll change

9)

Main Equipment Bar-joining machine

Dynamic pair cross mill

Advanced downcoiler with Switch-over

function

Carrousel coiler

Features Endless rolling technologies proved

through many experiences in actual

plants

Endless Rolling Technology

7) Strip Cooling System

Main Equipment Intermediate bar cooling system

between RM and FM

Strip cooling system between FM and

DC

Features Intensive strip cooling

Wide range temperature control

High response control valve

8) Down Coiler

Main Equipment Hydraulic pinch roll

Hydraulic side guide

Polisher for pinch roll

Advanced downcoiler

Features Non-step expanding mandrel

Quick-open control (QOC)

Excellent coil shape and surface

Long life mandrel

Flying Shear TunnelFurnace

Re-heat Furnace

Re-heat Furnace

Bar-joiningMachine

Slab/ContinuousCasting Machine

1)

2)

3)

6) 9)

5) 7)8) 9)

5)

4)

7)

9)

9)

5)

4)

5)

4)

7)

7)

9)5)

5)1) 3)

LEADING-EDGE TECHNOLOGIES FOR HOT STRIP MILL

3 4

Anvil opening and slab feeding by pinch roll.

Slab

Anvil

Pinch Roll

Slab feeding stops and pressing by anvil

1. Construction

- Application of roller bearing for rotating and reciprocating parts

2. Pressing pattern

decrease cropping loss

3. Short shutdown time for installation in existing plant

st and 2nd

nd

After 2nd

4. Other features

Press force

Processing speed

Slab length before press

JSW Steel

Anshan Iron & Steel, China

Stop and Go Press

Features

Technical Data

Option

Recent Supply Record

SLAB SIZING PRESS

5 6

Hydraulic AWC system for Hot Rolling Mill Hydraulic AGC system for Hot Rolling Mill

Hydraulic AGC systemExcellent thickness accuracy can be achieved, from top end to tail end of the production, by providing hydraulic gap adjusting cylinders

with the AGC system on mill stands.

The hydraulic gap adjusting cylinders are located under bottom back-up roll chocks or on top back-up roll chocks. The cylinders installed

under bottom back-up roll chocks will also work for the pass-line adjustment and the ski-head control especially for the roughing mill.

The electro-mechanical servo valves precisely control the hydraulic cylinder position.

Hydraulic AWC systemExcellent width accuracy can be achieved by providing the hydraulic AWC system on the vertical edger(s), from top end to tail end of

the production.

PTJ will apply complete hydraulic cylinder operated width control system which will work as the Short Stroke Control (SS) for the top

end and tail end parts, and also work as Automatic Width Control System (AWC) for body part. The electro-mechanical servo valves

precisely control the hydraulic cylinder position.

*Hydraulic Gap Control

Main parameter

Slab thickness: 70 to 300 mm

Slab width: 650 to 2,200 mm

Edging force: up to 8,000kN

Main parameter

-Strip thickness: 0.8 to 25.4 mm

-Strip width: 650 to 2,200 mm

-Rolling force: up to 50,000kN

Roughing mill attached vertical edger with hydraulic AWC system

Hydraulic gap adjusting cylinder in mill stand


HYDRAULIC AWC AND AGC SYSTEMSFOR HOT ROLLING MILL

Customer

ISDEMIR, Turkey

Baosteel No.3 HSM, China

Lianzhong Stainless Steel Co., China

Tonghua Iron & Steel, China

Benxi Iron & Steel, China

Baosteel Stainless Steel Branch, China

Tangshan Iron & Steel, China


Corus DSP, The Netherlands

Year

2008

2007

2006

2005

2005

2003

2003

2000

2000

AWC

x

x

x

x

x

x

x

x

x

RM HGC*

x

x

x

x

x

x

x

x

x

FM AGC

x

x

x

x

x

x

x

x

x

Customer

JSW Steel Dolvi, India

Formosa Ha Tinh Steel, Vietnam

TATA Steel Kalinganagar, India

Fuxin Special Steel, China

USIMINAS Cubatao No.2 HSM, Brazil

Hyundai Steel C-HOT, Korea

Dragon Steel, Taiwan

Tokyo Steel Tahara, Japan

Dongbu Steel, Korea

JSW Steel Vidyanagar, India

Year

2 0 1 7

2 0 1 5

2 0 1 5

2 0 1 3

2 0 1 2

2010

2010

2009

2009

2009

AWC

x

x

x

x

x

x

x

x

x

x

RM HGC*

x

x

x

x

x

x

x

x

x

x

FM AGC

x

x

x

x

x

x

x

x

x

x

7 8

mill to coil the transfer bars after roughing passes. The coil box

enables a shorter distance between the roughing mill and the

The mandrelless coil box contributes further to reducing the

temperature drop at the coil inner wraps in comparison with the

mandrel-type coil box. The mandrelless coil box also makes

space to install the side heat shields which contribute to

reducing the temperature drop at the coil edge.

Prevention of temperature drop at the coil inner wrap through

mandrel less coil transfer

Prevention of temperature drop at the coil edge through

adjustable side heat shields

Short-pitch coiling operation through higher coil speed

operation (up to 5 m/s) and the forced coil transfer operation

from coiling position to uncoiling position to enable the higher

productivity

temperature and uniform temperature over the whole length

Passing through the coil box without coiling is selectable

s

　(20 mm to 55 mm thickness, over 2,000 mm width maximum

in reference plant) to enable a wide rage of carbon steel

production, as well as stainless steel production

PTJ’s designed mandrelless coil box has two selectable coil transfer operations. One is passive coil transfer without any positive

mechanical actions as a simple operation method. The other is forced coil transfer. The forced coil transfer system ensures smooth and

Mandrel Type Coil Box

Temperature Drop at Inner Wrap due to Heat Transfer to the Mandrel

Mandrelless Coil Box

Start of uncoiling at coiling

position

Start of forced coil transfer Ready for co i l ing of next

transfer bar

Completion of coil transfer

down to uncoiling position

Prevention of Temperature Drop at Inner Wrap (Strip Tail End)

Coiling Position Uncoiling Position Coiling Position Uncoiling Position

Forced Coil Transfer Operation

Comparison of mandrelless coil box and mandrel type coil box


ISDEMIR, Turkey

Nakayama Steel Osaka, Japan

POSCO, Pohang No.2 HSM, Korea


2013

2008

2008

2006

2003

Features


ADVANCED COIL BOX(MANDRELLESS COIL BOX)

9 10

Possibleto cut

Differential peripheral speed ratio (RU/RL)

Kn

ife g

ap

at

kn

ife v

ert

ical p

osi

tio

n/b

ar

thic

kn

ess

( g

o /

to

)

Cut

ting

limit

(go/

to)

Direction of rotation

goRU

RL

Impossibleto cut

Differential speedcutting cropshears

Conventionalcrop shears

Knife radius Cutting process Sheared profile

Knife clearance:g

RU>RL

RU=RL

g<o g=o g>o

g>og>og>o

RU

RL

RU

RL

1 2 3

Increase of knife gapallowance against a bar thickness

Transfer bars rolled at a roughing mill have shapes out of

such unsteady parts of the transfer bar as crops for stable

The differential-speed rotary crop shear is a unique product of

incorporates top and bottom drums with different diameters

transitionally changed from plus–zero–minus, which ensures

several operational and economical advantages to customers

(

The differential-speed type rotary crop shear of PTJ has

adopted the following features through long-standing

Since the differential speed rotary crop shear is insensitive to

the knife wear and extended knife gap ( ), sharp cutting

performance is assured, and the knife changing cycle is also

PTJ maintains a line-up of several sizes of crop shears from

The PTJ rotary crop shear is able to cut the end crops in very

optimization system, so that a remarkable improvement in the

crop

Robust design and high torsional rigidity with the application of

synchronizing gears on the drum shaft ends between top and

Transfer Bar Thickness:

Transfer Bar Width:

Shearing Force:

Speed:

(Design max 80 mm)

Cassette type drum retraction

Quick drum changing system (cassette type only)

Customized crop disposal system

Double-knife type drums

Hydraulic unclamping system

Crop optimization system

Knife contours

Retractable exit roller

In-line Knife Change Type

Allowable Knife Gap of Differential Speed Type Crop Shear

Cassette Drum Type







Dongbu Steel, Korea


ISDEMIR, Turkey

Zhangjiagang Pohang Stainless Steel, China




Tangshan Iron & Steel, China


Recent Supply RecordTechnical Data

Optional Items

Features

DIFFERENTIAL-SPEED ROTARY CROP SHEAR

1 1 12

The pair cross mill (PC mill) was developed in 1980’s

and has contributed to the achievement of high

controllability. PTJ has enhanced the PC mill and is

now supplying a 3rd generation PC mill with a mill

stabilizer, the so-called Advanced Pair Cross Mill.

The advanded PC mill is simpler to operate and

easier to maintain.

The number of the roll cross devices is reduced to

less than one-fourth of those of the 1st generation

PC mill. The advanded PC mill has the capability for

higher reduction thru the use of a mill stabilizer to

reduce mill vibration. The mill stabilizer is installed

on the entry side housing and eliminates the

clearance between the chocks and housing during

operation. This feature will reduce the task of

maintaining the entry-side housing liner to approx.

one-third that of a conventional mill.

Higher reduction rolling without mill vibration through the

combination of PC mill and mill stabilizer

simple principle of roll cross (see below)

Stable operation with the elimination of clearance between

roll chocks and housing and symmetrical roll crown control to

reduce camber and the pinching problems

Reduction of impact force at the roll bite through the mill

stabilizer, resulting in the reduction of the damage and wear

on equipment

Higher reliability of equipment

Very few maintenance parts with long replacement interval

Possible to install the mill stabilizer to any type mills

Principle of roll cross Control of strip crown by roll crossCross Angle Strip Crown

Positive

1st Generation PC Mill 2nd Generation PC Mill 3rd Generation PC Mill

(Advanced PC Mill)

Enhanced PC Mill

Flat

Negative C = Se-Sc: Equivalent Roll Crown

: Roll cross angle

b : width of material to be rolled

Note : Sc=Constant (independent of cross angle)

Recent Supply RecordFeatures

ADVANCED PAIR CROSS MILL(PAIR CROSS MILL WITH MILL STABILIZER)





USIMINAS Cubatao No.2 HSM, Brazil



Dongbu Steel, Korea


ISDEMIR, Turkey

Boasteel, No.3 HSM, China




2 0 1 7

2015

2015

2013

2012

2010

2010

2009

2009

2008

2007

2005

2005

2003

13 14

Grinding wheel

Overall grinding with ORP

CBN Grinding Wheel

2 0 1 1

2010

2008

2007

2006

2002

2002

2002

2001

2000

rolling

Cause of coil surface trouble

Coil surface trouble

<Overall grinding with ORP>

<Partial grinding with ORP>

- Step wear

Effect

ORP GrindingFunctions

Rolling schedule limitation


Technical Data

Features

ON-LINE ROLL PROFILER (ORP)

20102007

2006

20022 0 0 1

15 16

To

rqu

e v

alu

e /

Nm

0

Torque Meter (–)

50

100

150

200

250

–800

–40

–20

0

20

40

60

80

100

120

–600 –400 –200 0

Distance from Strip Center (mm)

Str

ip S

hap

e (

I-u

nit

)

200 400 600 800

–800

–60


Str

ip S

hap

e (

I-u

nit

)

–40

–20

0

20

40

60

–600 –400 –200 0 200 400 600 800

–800

–60


Str

ip S

hap

e (

I-u

nit

)

–40

–20

0

20

40

60

–600 –400 –200 0 200 400 600 800

–800

–60


Str

ip S

hap

e (

I-u

nit

)

–40

–20

0

20

40

60

–600 –400 –200 0 200 400 600 800

Actual operationLooper shape meter

Measurement of torque value Total shape

1st order strip shape

LSM measures the tension distribution across the strip width through individually detected loads on segmented rolls, and then

LSM has superior advantages as follows:

- Easily interchangeable with existing loopers and LSM because the moment of inertia is small

- Easy replacement of segment roll for maintenance

mill stands during rolling operation

operations to enable higher strip shape quality and mill productivity

Reduction of pinching problems at strip tail end to enable higher productivity and stable rolling, especially thin-gauge rolling

The synchronized measurements of strip shape and off-centering to enable control of off-centering

Sensor type

Roller dimension

Strip width

Segment

Applicable scope

Torque meter

185 mm dia x 194 mm body length

1000 mm


Hyundai Steel B-HOT, Korea

2015

2013

2006

1

2) The calculated total shape can be divided into 0th, 1st, 2nd and 4th

3) Strip shape can be controlled according to the results of each order

2nd order strip shape

4th order strip shape

Example of measurement in actual operation


Features

Technical Data

LOOPER SHAPE METER (TENSION METER)

17 18

FDT

Tem

pera

ture

Time

1 st Cooling

Zone

AST

CT

1 st CET

2nd Cooling Zone

Air Cooling Zone

(ACT)

2nd CET

FCT

Top Header

Bottom Header

Side SprayControl Valve

Head Tank

Lin

e

Head tank along cooling line

High response control valves

FDT

1st CET

AST

ACT

2nd CET

FCT

CT

: Finishing mill delivery temperature

: 1st cooling zone entry temperature

: Air cooling start temperature

: Air cooling duration time

: 2nd cooling zone entry temperature

: Finishing cooling temperature

: Coiling temperature

Ex. A Cooling Pattern for DP Steel

2 0 1 7

2 0 1 5

2 0 1 5

2 0 1 2

2010

2010

2009

2009

2008

2007

2004

2000

Recent Supply RecordFeatures

INTENSIVE STRIP COOLING SYSTEM

19 20

1 Sideguides

2 Pinch roll

3 Quick opening control

Pinch Roll

Unit Roll

Mandrel


Other Essential Features

ADVANCED DOWN COILER

21 22

Clamp

Power source

Joining area Knife

Joiningarea

Crop

Clamp

Drive Motor

Press

Preceding Bar

Clamp Frame (for Preceding Bar)

Induction Heater

High-pressure descalerFollowing

bar

Preceding bar

ClampKnife

Crop

Succeeding Bar

Travel

Travel

Clamp Frame

(for Succeeding Bar)

Partial Descaling

Overlapping

Device

Joining Machine

Coil Box

Leveller Crop Disposal Device

Finishing Mill

Crop Shear Preceding Bar

Following Bar

1 Sheet Bar Joining Machine

Induction Heating Joining Machine in Operation

Super Deformation Joining Machine in Operation

Joining Sequence and Mechanism

Design of Super Deformation Joining Machine

The concept of the endless hot rolling was

introduced to meet demands for diverse

products of hot rolled steel sheets using a

cost-effective process compared to the

conventional batch-type process. Endless

rolling involves joining of the tail end of a

preceding bar and the head end of a following

bar after rough rolling. The repetitively joined

results in the endless rolling. This process has

the following advantages over the conventional

batch-type process:

1. Expansion of product lineup: Production of

rolling of thin and hard-to-roll materials.

2. Increase in productivity: Great reduction in

reduction of mill acceleration and

deceleration time.

3. Improvement of product quality:

Improvement in accuracy and uniformity of

4. Energy savings: Reduction of the mill acceleration and deceleration frequencies.

5. Increase of yield: Minimization of miss-rolling of thin and hard-to-roll materials: Application of tension at head and tail parts of bar.

1.

the area to be joined before overlapping.

2. The head of the following bar is partially overlapped on the

tail of the preceding bar by increasing the speed of the

following bar.

3. Both bars are joined by shearing action of the stationary

pendulum type-joining machine.

4. Crops on both sides are pushed off from the joint and

disposed.

[b] Super Deformation Joining (SDJ)

The

[a] Induction Heating Joining (IHJ)

JFE Steel

Joining Process

Joining Method

Induction Heating Joining (IHJ)

Joining Temperature

Super Deformation Joining (SDJ)

Characteristic of Equipment

Joining Time About 10 (sec)

Joining : Semi Solid(Solid Fraction 70%)

Joining : Semi-solid(Solid fraction 70%)

Within 1 (sec)

Joining: Super Deformationand Frictional Upset

Joining : 1000(Material temp.)

of joining table with this method.

Transfer bar width

Transfer bar thickness

Transfer bar temperature

25 to 35 mm

Layout Main Data

Partialdescaling

1Over

-lapping

2Joining

3Crop

disposal

4


2006

1996

ENDLESS ROLLING TECHNOLOGY

23 24

Actual Operation Chart for Semi-endless rolling (t1.5 t1.2 t1,0 mm)

High Speed Shear (HSS)

Advanced DC with switch-over function

In addition to the transfer bar joining technology, the following

items are key technologies to implement for successful endless

rolling.

2) Shear to split long strip before coiling

3) Dynamic switching over of coilers during high- speed rolling

and coiling

PTJ is the only supplier in the world that can supply a complete

operation with PTJ’s endless rolling technology, with remarkable

accomplishments.

PTJ offers, in connection with the above, the following proven

technologies for the customer.

1) Advanced dynamic PC Mill

2) High-speed shear

3) Advanced down coilers with switch-over function (Option:

Carrousel coiler)

Dynamic PC Mill is designed to provide to dynamic APFC,

which produces high-quality products in combination with a

high-response work roll bending system at the

above-mentioned 5 hot strip mills.

Application and number of Dynamic PC stands are

customized in accordance with product range and other

requirements.

Dynamic PC Mill can also be effective for normal batch rolling

for compensation of thermal expansion of work rolls and

changes in other rolling conditions in bar.

- Max PC angle: 1.2 degrees

- Max spee : 0.04 deg/sec (in-bar)

Four-unit roll type hydraulic down coiler.

Equipped with;

- Hydraulic pinch roll with offset adjustment mechanism,

- Swinging gate

- Pneumatic strip feeding system

Strip thickness

Strip width

Threading speed

Rotary-type shear with single knife.

Equipped with eccentric mechanism, with which the drums

approach each other at shearing.

Long-life design knives.

F5 Total Force

F5 Ave. Gap

F5 WRB Force (kN)

F5 PC Angle (deg)

F5 Line Speed (m/s)

Deviation of Strip Thickness (mm)

: 0.8 – 5.0 mm

: 750 – 1,750 mm

(2,200 mm)

: Max. 20 m/sec

: 0.8 to 12.7 mm

: 750 – 1,750 mm

(2,200 mm)

: Max. 20 m/sec

Strip Thickness

Strip Width

Speed

High Speed Shear (HSS)

Advanced DC with switch-over function

ENDLESS ROLLING TECHNOLOGY

2 Key Technologies for Endless Rolling

25 26

- Slab sizing press

- 2Hi roughing stand (R1) and 4Hi roughing stand (R2)

with quick roll changing system

- R2 attached vertical edger with

automatic width control (AWC)

- Edge heater and bar heater

- Drum type crop shear

- Descaling facilities

- F1 attached vertical edger

Pair cross system (F1-F4)

Mill stabilizer device (F1-F4)

Work-roll shift device (F5-F7)

Work-roll bending system (F1-F7)

Hydraulic automatic gauge control system (AGC)

Hydraulic looper

Quick roll changing device

Hot-rolling oil system

Interstand cooling system

- Laminar cooling system

- Two down coilers with

hydraulic quick opening control system (QOC)

- Non-step expanding mandrel

- Coil conveyor system

Production Capacity

Steel Grade

Strip Thickness

Strip Width

Coil Weight

Low-alloy steel

Stainless steel

Production Data

Production Capacity

Steel Grade

Slab Thickness

Slab Width

Slab Length

Strip Thickness

Strip Width

Coil Weight

Low alloy steel

Non grain-oriented Si steel

Grain oriented Si steel

IF steel

DP & TRIP steel

Production Data

Downcoiler2DC + 1DC(Future)

Finishing MillFSB

Crop Shear

Edge Heater

Bar Heater4Hi-R2 with AWC Edger2Hi-R1

SSP

Reheating Furnace

HSB

HeatHoldingCover

- One additional down coiler

1,880 mm deluxe hot strip mill with short delivery time

- Vertical edger with automatic width control (AWC)

- One heavy-duty 4Hi roughing stand with quick roll

changing system

- Mandrelless coil box

- Drum-type crop shear

- FSB (No water leakage during stainless steel rolling)

- F1 attached vertical edger

Advanced pair cross system

(PC mill with mill stabilizer device) (F1–F4)

Work roll bending system (F1–F7)



Hot rolling oil system


- Two down coilers

Stainless steel branch HSM for Baoshan Iron & Steel Co., Ltd.

BAOSTEEL NO.3 HOT STRIP MILL PROJECT (Shanghai, CHINA) BAOSTEEL STAINLESS STEEL BRANCH HSM (Shanghai, CHINA)

Down Coiler

Mandrelless Coil Box

Heavy Duty Roughing Millwith AWC Edger

Reheating Furnace

FSBCrop Shear

HSB

Finishing Mill

LINE SPECIFICATION

LINE CONFIGURATION

LINE CONFIGURATION

UNIQUE FEATURESLINE SPECIFICATION

Future Phase

Start-up Phase

UNIQUE FEATURES

REFERENCE

27 28

- Vertical edger with automatic width control (AWC)

- 4Hi roughing mill

with quick roll changing device

- Mandrelless type coil box

- Drum type crop shear

with quick drum changing device


Pair cross system (F1–F4)

Mill stabilizer device (F1–F4)

Work roll shift device (F5–F6)

Work roll bending system (F1-F6)


Hydraulic looper









Production Capacity

Steel Grade

Slab Thickness

Slab Width

Slab Length

Strip Thickness

Strip Width

Coil Weight

High-strength steel

Production Data

Finishiing Mill

Finishiing MillF1

1

Down Coiler

FSB

(Future)AWC Edger

HSB

Crop Shear

Mandrel LessCoil Box

- One additional roughing mill

- One additional down coiler

Future Phase

Start-up Phase- Slab sizing press


quick roll changing device






Hydraulic looper





- Three down coilers with




Production Capacity

Steel Grade

Slab Thickness

Slab Width

Slab Length

Strip Thickness

Strip Width

Coil Weight

High-strength steel

Production Data

Start-up Phase

2,180 mm first hot strip mill in Turkey supplied by PTJ 2,250 mm hot strip mill supplied by PTJ in India will start up in 2009

ISDEMIR HOT STRIP MILL PROJECT (Iskenderun, TURKEY) HOT STRIP MILL PROJECT FOR JSW STEEL LIMITED (Toranagallu, INDIA)

FSBHSB

Down Coiler

Crop Shear (Future)

SSP AWC Edger



LINE CONFIGURATION LINE CONFIGURATION

REFERENCE

29 30

- Dynamic pair-cross system equipped on the

which can achieve powerful crown control even

gauge-change function necessary for semi-endless

rolling

higher reduction

- Ultra-fast cooling system installed on the run-out

table for cooling the strip rapidly to the target

coiling temperature in a shorter cooling zone

- High-speed strip shear for cutting the strip to

suitable length using two knife drums and a

coiling with two mandrels

Innovation Phase

- Looper shape meter (LSM) for measurement of

stable rolling operation

- Mill stabilizer device for prevention of mill vibration

Start-up Phase

Carrousel Coiler

Roughing Mills

Production Capacity

Steel Grade

Slab Thickness

Slab Length

Strip Thickness

Strip Width

Coil Weight

: Low-carbon steel

High-strength steel

Production Data

Type of Mill

Looper

Strip Cooling

Strip Shear

Coiler

Line Speed

: Looper with shape meter (#4 looper)

: Ultra-fast cooling type

: Carrousel reel and wrapper roll type

Line Data

Semi-endless rolling process on compact hot strip mill

TATA STEEL EUROPE DIRECT SHEET PLANT (Ijmuiden, THE NETHERLANDS)

Finishing Mills

UNIQUE FEATURES

LINE CONFIGURATION

LINE SPECIFICATION

REFERENCE

31 32

Roughing mills

Continuous

Casting

Machine

Crop ShearTunnel

FurnaceEdger

Coil Box

R1 R2

FSB

F2 F5F1

Finishing mills

F4F3 F6 #1 DC

-Tandem operation of two roughing mills independently

- Mandrelless coil box

Hydraulic automatic gauge control (AGC) in all stands

Pair-cross mill (PC Mill) for F2 and F3

Work roll bending system in all stands

Hot rolling oil system in all stands

Mandrel-Less Coil Box

Overview of Plant

G Steel (formerly Siam Strip Mill Public Co., Ltd.) plant in Thailand is the largest integrated hot rolled coil products manufacturer in

Southeast Asia. It comprises the three basic production processes of steelmaking, continuous casting and hot rolling mill integrated into

a close-coupled production line so called “Mini Mill.”

PTJ supplied not only the hot rolling equipment and its auxiliaries, such as water treatment plant, cranes, sub-station, etc. but also the

civil and building construction and installation for whole the production process equipment, on turn-key basis.

G STEEL PUBLIC COMPANY LIMITED (Rayong, THAILAND)

Production Capacity

Steel Grade

Strip Thickness

Strip Width

1.5 million tons/year

(Start-up phase)

Medium-carbon, High-carbon

Production Data

LINE SPECIFICATION

LINE CONFIGURATION

UNIQUE FEATURES

Finishiing MillNo.3 DC(Future)

Down Coiler

- Slab sizing press

- Vertical edger (E1) with


- 2Hi roughing mill (R1)

- Vertical edger (E2) with


- 4Hi roughing mill (R2) with

quick roll changing device

- Heat Holding Cover





Work roll shift device (F5–F7)

Work roll bending system (F1-F7)


Hydraulic looper









Production Capacity

Steel Grade

Slab Thickness

Slab Width

Slab Length

Strip Thickness

Strip Width

Coil Weight

High-strength steel

SUS)

6.5 SUS)

1524 SUS)

Production Data

- One additional down coiler (No.3 DC)

Future Phase

Start-up Phase

2,050 mm Semi-Continuous hot strip mill supplied by PTJ in Taiwan has started up in 2010Doragon Steel Corporation, a member of CSC Group, has been a manufacturer of long product in Taiwan. It promotes modernization and

expansion project in the factory. Dragon Steel Corporation

HOT STRIP MILL PROJECT FOR DRAGON STEEL CORPORATION (Taichung, TAIWAN)

FSBHeat Holding CoverHSB

No.3 RF

Crop Shear

2Hi-R1SSP4Hi-R2 with AWC Edger

Reheating Furnace


LINE CONFIGURATION

REFERENCE

33 34

efficiency and raise overall productivity. - · PDF filein the end-less rolling line of the...

Documents

Transcript of efficiency and raise overall productivity. - · PDF filein the end-less rolling line of the...