multiroll mill stands for stainless-steel...

MULTIROLL MILL STANDSMULTIROLL MILL STANDSfor stainless-steel strip

Cold Rolling Mills

SMS metallurgy

FLAT-PRODUCT MILLS

STAINLESS STEEL,STAINLESS STEEL,a multipurpose material

Cold Rolling MillsSMS SIEMAG

2

From ARCHITECTURE and

HOUSEHOLD APPLIANCES to

VEHICLE CONSTRUCTION

Stainless steel is a premium material for awide range of applications. Whenever itcomes to corrosion-resistance, aestheticsand durability, stainless steel is the firstchoice. Thanks to its unlimited recyclabil-ity, stainless steel is highly eco-friendlyand helps protect our environment.

Architecture and façades

Aesthetic attraction and resistance toenvironmental impacts – stainless steel isbuilding protection in perfection.

Chemicals and petrochemicals

Corrosion, acid and heat resistance alongwith reliable strength – stainless steel isperfectly suited for the processes in thechemical and petrochemical industry.

Medical instruments

and food industry

Hygienic, clean and robust – stainlesssteel meets all requirements for applica-tions in medicine and the food industry.

Household appliances

Ultrabright polish or brushed matt finish,simple elegance combined with excellentformability – stainless steel is a fascinat-ing material which brightens up even dailyroutines like cooking, doing the laundryand washing the dishes.

Vehicle construction

High strength, low weight, energy-absorb-ing and resource-protecting – stainlesssteel has the ideal properties for auto-motive and vehicle construction.

Offshore technology

and shipbuilding

Aggressive sea water, wind and weather– just the ideal environment for corro-sion-resistant and robust duplex steels.

INTRODUCTION

Stainless steel,

a multipurpose material - 2 -Top technology

for top products - 4 -

SPLITBLOCK STANDS

YUSCO - 6 -LISCO - 8 -ThyssenKrupp VDM -10-YUSCO -12-Outokumpu -14-POSCO -16-ThyssenKrupp Nirosta -18-

MONOBLOCK STANDS

TPSS -22-ThyssenKrupp AST -24-TPSS -26-LISCO -28-TISCO -30-TPSS -32-SKS -34-ThyssenKrupp AST -36-

18-HIGH STANDS

YUSCO -38-

3

Stainless steel – versatility at its best.

18-high stand.

TOP TECHNOLOGYTOP TECHNOLOGYfor top products


4

EXPERTISE IN PLANT

TECHNOLOGY FOR

STAINLESS STEEL

SMS Siemag ranks among the leadingsuppliers of plant technology and equip-ment for the production of high-qualitystainless-steel strip. We have alreadysupplied more than 100 cold-rolling millsfor stainless steel, silicon steels and carbon steel to customers around theglobe. In addition, our product portfolioincludes annealing and pickling lines forcold and hot strip, bright-annealing lines,skin-pass mills as well as preparationand finishing lines. And in recent years,we have continuously expanded ourElectrics and Automation as well as Service Divisions so that SMS Siemag isable to offer its worldwide clientele thefull range of plant technology and equip-ment for the production of high-qualitystainless-steel products.

MONOBLOCK, SPLITBLOCK

AND 18-HIGH COLD

ROLLING MILLS

For the production of stainless-steel coldstrip, SMS Siemag supplies powerful 20-high rolling mills which are designedas stand-alone stands operating in revers-ing mode. They come in two versions:the closed, robust MonoBlock design orthe more flexible SplitBlock type. Bothtypes of roll stands permit to achieveminimum thicknesses down to 0.1 mmat rolling speeds of up to 1,000 m/minand maximum thickness reductions ofup to 90%. Another design are our

18-high stands with Z-high roll setswhich are particularly suited for integra-tion and use in continuous productionfacilities. Fully automated high-speed rollchanging and highly dynamic control sys-tems are a must for the implementationof a continuous production process. Several stands in tandem arrangementrepresent a high-performance plant con-cept for the economical production ofpremium-quality stainless-steel strip.

Moreover, the complete design or con-figuration of our Z-high roll setups allowsto subsequently revamp existing four-high or six-high stands, thereby cuttinginvestment costs as compared to newplants.

EXPLANATION OF

TYPE DESIGNATION

Example: SB22-52”SB = SplitBlock22 = size identification code52” = rollable width in inches

5

Yieh United Steel,SB22-52”, mill No. 2Lianzhong Stainless Steel,SB22-52”, mill No. 1ThyssenKrupp VDM,SB33-30”Yieh United Steel,SB22-52”, mill No. 1Outokumpu, SB21-64”Posco, SB21-52”ThyssenKrupp Nirosta,SB21-53”

MONOBLOCK STANDS

Yieh United Steel,ZR613A-52”

SPLITBLOCK STANDS 18-HIGH STANDS

Left: SplitBlock design.Right: MonoBlock design.

TPSS Yuantong Stainless Steel Ware,MB22B-54”, mills No. 3 + 4ThyssenKrupp Acciai Speciali Terni,MB22B-54”, mill No. 7TPSS Yuantong Stainless SteelWare, MB22B-54”, mill No. 2Lianzhong Stainless Steel,MB21BB-63”, mill No. 2Taiyuan Iron & Steel,MB22B-52”, mills No. 4 to 8TPSS Yuantong Stainless SteelWare,MB22B-54”, mill No. 1Shanghai Krupp Stainless,MB22B-53”ThyssenKrupp Acciai Speciali Terni,MB21BB-62”, mill No. 6

Overview of mills supplied.

YIEH UNITED STEEL, YIEH UNITED STEEL, TaiwanMill No. 2

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Second 20-high mill

from SMS Siemag

This size-22 SplitBlock stand is the sec-ond roll stand that SMS Siemag has builtfor Yieh United Steel Corporation (Yusco).The customer again decided in favor ofthis proven concept because of the goodexperience gained with the first facility.

Just like mill No. 1, this second coldrolling stand incorporates all the actua-tors or control elements needed for roll-gap setting and is thus able to process awhole range of different strip grades andqualities into precisely rolled finishedproducts.

A thickness and flatness control systemas well as a mathematical model devel-oped by SMS Siemag preset all rollingparameters and control them fully auto-matically while rolling is underway.

There was no need to install an addi-tional uncoiling station as the startingmaterial can be introduced into theprocess directly at the reversing coilers.

SplitBlock StandsSMS SIEMAG

Roll changing.

SPLITBLOCK STANDS

SplitBlock stand.

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20-HIGH MILL STAND

SplitBlock SB22-52”

Commissioning 2007

Production data

Material stainless-steel strip

AISI 300 and 400 series

Strip width 800 to 1,300 mm

Strip thickness

ingoing max. 6.0 mm

outgoing 0.15 to 3.0 mm

Coil weight max. 28,000 kg

Technical data

Stand type SB 22- 52”

Rolling speed max. 700 m /min

Rolling force max. 7,850 kN

Strip tension max. 500 kN

Capacity 80,000 tpy

Technical features

- Servohydraulic roll-gap control (AGC)

- Crown adjustment for backup shafts A/D and F/G

- Shifting of first intermediate rolls bymeans of a push/pull system

- SUPAFINE® filtration system for coolingand ultrafine filtering of the rolling oil used

- Mathematical model

- Thickness and flatness control systems

Crown adjustment A and D.

YUSCO

LIANZHONG STAINLESS STEEL, LIANZHONG STAINLESS STEEL, ChinaMill No. 1


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20-high mill for

greenfield location

Lianzhong Stainless Steel Corporation(Lisco), a subsidiary of Taiwan’s YiehUnited Steel Corporation, is a productionlocation set up on a greenfield site insouthern China. For the new plant, SMSSiemag supplied one size-22 SplitBlockstand for a rolling width of 1,300 mm as well as one MonoBlock stand of size21 for 1,600-mm-wide strip. Both standswere fabricated in minimum time andstarted up in 2006.

Manufactured in our Hilchenbach work-shops, the 20-high SplitBlock stand wascompletely preassembled including entry-and exit-end equipment and the standplatform so that essential motions andthe functions of the hydraulic systemcould be tested prior to final installationin the customer’s works. As a result, the original erection and commissioningschedule could be shortened by severalweeks.

Various actuators or control elements forroll-gap setting make it possible for thecold-rolling stand to process a wholerange of different strip grades and quali-ties. A thickness and flatness control sys-tem is also part of its equipment outfit.All rolling parameters are preset by amathematical model from SMS Siemagand controlled fully automatically duringthe rolling process.

SplitBlock stand.

Top and bottom roll sets. Backup shaft adjustment in detail.

SPLITBLOCK STANDS

9

20-HIGH MILL STAND


Commissioning 2006

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data





Capacity 80,000 tpy

Technical features







Preassembly in our shops.

LISCO

20-high mill for foil production

To ThyssenKrupp VDM, Germany, SMSSiemag supplied a 20-high cold rollingmill for the safe and reliable productionof foils, especially ultrathin foils down to a minimum final thickness of 20 µm.

The foils are made of high-strength special alloys which are employed, forinstance, in automotive catalytic convert-ers. SMS Siemag supplied the plant on turnkey basis including mechanicalequipment, utility systems and electrics& automation.

Highly dynamic actuators and adequatecontrol systems in the roll stand enablethe production of ultrathin foils withthickness tolerances of minimum 1 µm.For this purpose, the mill is equippedwith feed-forward and feed-backwardmass-flow control systems for thicknesscontrol. And this cold rolling facility isthe first ever to incorporate our novelSMS Siemag flatness measuring rollwith closed roll surface.

The mill stand is fitted with all controlelements required to produce strip withtop flatness. This includes crown adjust-ment on backup shafts A and D, shiftingof the first intermediate rolls and adjust-ing possibilities such as tilting andswiveling of the top roll set by means of the AGC system.

ThyssenKrupp VDM, ThyssenKrupp VDM,Germany


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SplitBlock stand.Belt wrapper.

Plate-type filter system. SMS Siemag’s flatness measuring roll.

The additional uncoiling station with bridle roll set reduces the nonproductivetimes during coil changing and enablesmaximum strip tensions during the initialpass.

SPLITBLOCK STANDS

11

20-HIGH MILL STAND


Commissioning 2002

Production data


AISI 300 and

400 series,

special steels

Strip width 350 to 750 mm

Strip thickness

ingoing max. 1.0 mm

outgoing 0.02 mm


Technical data

Stand type SB 33 - 30”




Capacity 5,000 tpy

Technical features


- Crown adjustment for backup shafts A and D


- Additional uncoiling station with bridle roll set

- Plate-type filter system for cooling andultrafine filtering of the rolling oil used

- Complete automation including thicknessand flatness control systems from SMS Siemag

Exit section.

Stainless

First SplitBlock stand

in size SB22

The 20-high mill stand at Yieh UnitedSteel Corporation is the first size-22 SplitBlock stand ever built by SMS Siemag.Taiwan’s largest stainless-steel producer,Yieh United Steel Corporation (Yusco)uses this 20-high mill to roll strip in widthsof 800 to 1,300 mm down to final thick-nesses of minimum 0.15 mm.

Thanks to its large number of actuatorsor control elements for roll-gap setting,the roll stand is able to process a wholerange of different strip grades and quali-ties. For the first time, the hydraulic roll-gap adjusting cylinders were arranged inthe upper part of the stand to ensureready access for maintenance jobs. Allrolling parameters are preset by a mathe-matical model from SMS Siemag andcontrolled fully automatically during therolling process. Control systems ensureexact final thicknesses and a perfectlyflat strip.

The coils can be placed directly on thereversing coiler so that no separateuncoiling station with pinch roll leveler is needed.

YIEH UNITED STEEL, YIEH UNITED STEEL, TaiwanMill No. 1


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SplitBlock stand.

Roll changing.

Coil loading.

SPLITBLOCK STANDS

13

20-HIGH MILL STAND


Commissioning 2001

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data





Capacity 80,000 tpy

Technical features







Stand exit side.

YUSCO

OUTOKUMPU, OUTOKUMPU, Finland


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20-high mill for wide

stainless-steel strip

The largest SplitBlock stand ever built bySMS Siemag is in operation at Outokumpu(formerly Outokumpu Stainless Steel) inTornio, Finland, and is the Tornio loca-tion’s third 20-high roll stand. Featuring arolling force of 16,000 kN and a maximumstrip tension of 600 kN, this powerfulfacility is able to process stainless-steelstrip in widths up to 1,625 mm and ingo-ing thicknesses up to 8 mm. Coil handlingis fully automated using self-controlledcoil cars.

The backup shafts are secured in thestand block by means of a hydraulic sad-dle clamping device and need not bedetached manually by the maintenancecrew. Changing of the work rolls and thefirst intermediate rolls is done fully auto-matically by a robot system. The uncoil-ing station with leveler unit reduces idletimes during coil changing.

A large number of actuators or controlelements for roll-gap setting make surethat a whole range of different stripgrades and qualities can be processedwith top results. In addition to a thick-ness and flatness control system, thefacility avails of a mathematical model for presetting the rolling parameters andfully automatic process control.

SplitBlock roll stand.

Coil strapping station.

SPLITBLOCK STANDS

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20-HIGH MILL STAND


Commissioning 1996

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 8.0 mm

outgoing min. 0.3 mm


Technical data

Stand type SB 21- 64”Rolling speed max. 800 m /minRolling force max. 16,000 kNStrip tension max. 600 kNCapacity 150,000 tpy

Technical features


- Crown adjustment for backup shafts A to D


- Fully automated roll-changing robot

- Additional uncoiling station with pinch rollleveler for coil preparation

- SUPAMIC® filtration system for coolingand ultrafine filtering of the rolling oil used



Roll changing robot.

POSCO, POSCO, South Korea

20-high mill for

large coils

This 20-high rolling mill is geared toprocess stainless-steel strip coming incoils with a maximum weight of 35 t and diameters of up to 2,400 mm. Stripwith an ingoing thickness of maximum 5 mm is rolled down to a minimum finalthickness of 0.1 mm. Thanks to variedactuators or control elements for roll-gapsetting, a whole range of different stripgrades and qualities can be processedwith top results.

The work rolls and the first intermediaterolls of this mill are changed fully auto-matically, while changing of the secondintermediate rolls and the backup shaftsis accomplished in semiautomatic mode.The backup shafts in the stand block are fastened by means of a hydraulicsaddle clamping device and need not beunclamped manually by the maintenancecrew. An automated transport systemsupplies the paper winders with freshpaper coils which are kept on stock in a store beside the roll stand. To boostproductivity, the mill is equipped with anuncoiling station and a leveler unit forshorter nonproductive times during coilchanging. The sequences for coil loadingand strip threading are automated.

A thickness and flatness control systemis also part of the mill’s equipment outfit.All rolling parameters are preset througha mathematical model and controlledfully automatically during the rollingprocess.


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SplitBlock stand.

Uncoiling station. Main control pulpit.

SPLITBLOCK STANDS

17

20-HIGH MILL STAND


Commissioning 1995

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 5.0 (5.5) mm

outgoing min. 0.1 to 2.0 mm


Technical data





Capacity 120,000 tpy

Technical features









Automatic roll-changingrobot.

ThyssenKrupp NIROSTA, ThyssenKrupp NIROSTA, Germany

SplitBlock Stands

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20-high mill for maximum

rolling speeds

Stainless-steel strip with ingoing thick-nesses of maximum 8 mm can beprocessed on this 20-high stand, thefourth at the Krefeld location. For highestoutput and performance, the facility canbe operated at a maximum rolling speedof 1,000 m/min. Equipped with a largevariety of actuators or control elementsfor roll-gap setting, the stand is able toprocess a whole range of different stripgrades or qualities.

The work rolls and the first intermediaterolls of this mill are changed fully auto-matically, while changing of the secondintermediate rolls and the backup shaftstakes place in semiautomatic mode. Ahydraulic saddle clamping device servesto secure the backup shafts in the standblock so that any manual unclamping bythe maintenance crew is unnecessary.The uncoiling station with walking-beamcoil conveyor and leveler unit reducesthe idle times during coil changing,thereby increasing the mill’s productivity.The sequences for coil loading and stripthreading are automated.

Easy maintenance and ready access areensured thanks to central arrangement of all hydraulic controls on a platformbehind the stand. The process controlsystem comprises: X-ray thickness mea-suring system, thickness control system,flatness measuring roll and control sys-tem as well as a mathematical model forpresetting and control of all rolling param-eters.

Main control pulpit.

SMS SIEMAG

Stand block with rolls.

SPLITBLOCK STANDS

19

20-HIGH MILL STAND


Commissioning 1995

Production data

Material stainless-steel stripAISI 300 and 400 series

Strip width 500 to 1,350 mmStrip thickness

ingoing max. 8.0 mmoutgoing 0.2 to 3.0 mm


Technical data

Stand type SB 21- 53”Rolling speed max. 1,000 m /minRolling force max. 12,000 kNStrip tension max. 500 kNCapacity 120,000 tpy

Technical features









SplitBlock roll stand.

Stainless


20

Inspired by the successful developmentof stainless-steel production at its Tianjinlocation, the customer decided to takeanother expansion step into the profitablestainless-steel market. To ensure quickand smooth implementation of this pro-ject, TPSS chose SMS Siemag to supplytwo new 20-high rolling mills. The goal isto double the existing plant’s cold-rollingcapacity to 400,000 t.

Just like mills No. 1 and 2, the new coldrolling facilities will be of the provenMonoBlock design and equipped withcutting-edge technology and equipmentfrom SMS Siemag. The product spec-trum will comprise stainless-steel stripwith a maximum width of 1,350 mm andingoing thicknesses of up to 6 mm whichwill be rolled down to a final thickness of minimum 0.15 mm.

On both sides, the roll stands are equippedwith high-tension reversing coilers andthe entry and exit facilities required forthe economical production of stainless-steel strip. There was no need to investinto an additional uncoiling stationbecause the coils to be rolled can beloaded directly on the reversing coilers.In addition to a highly dynamic thicknessand flatness control system, both millscome with a mathematical model for pre-setting all process parameters and fullyautomatic control of the rolling process.

To use the resources employed as eco-nomically as possible and protect theenvironment, both mills will be equippedwith a modern SUPAFINE® filtration sys-tem for efficient cleaning and cooling ofthe rolling oil used.

Main control pulpit with processcontrol system.

MonoBlock StandsSMS SIEMAG

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TPSS YUANTONG STAINLESSSTEEL WARE, TPSS YUANTONG STAINLESSSTEEL WARE, Mills No. 3 and 4

Control stand.

Starting material.

MONOBLOCK STANDS

20-HIGH MILL STANDS

MonoBlock MB22B-54”

Commissioning 2009

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data

Type of stands

No. 3 to 4 MB 22 B - 54”




Capacity 80,000 tpy

Technical features


- Crown adjustment for backup shafts B/Cand F/G





Here again, our customer can draw onthe proven equipment, vast experienceand special know-how of SMS Siemag inthe field of ultrafine filtration of rollingoil.

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Photo, left: Work rolls with strip cooling.Photo, right: High-tension reversing coiler.

TPSS

Gesamtsicht des MonoBlock-Walzgerüsts.

ThyssenKrupp ACCIAI SPECIALI TERNI, ThyssenKrupp ACCIAI SPECIALI TERNI, Italy, Mill No. 7

Seventh 20-high mill

Using proven plant technology and equip-ment made by SMS Siemag – that’s howthe Terni, Italy, location will carry on itssuccess story. The new cold rolling millincorporates leading-edge stand techniqueand is already the seventh MonoBlockwhich the customer ordered from SMSSiemag for its Terni operations.

Acciai Speciali Terni is Italy’s largeststainless-steel producer and belongs tothe ThyssenKrupp Stainless group, aEuropean producer of high-quality stain-less-steel strip for the globally risingdemand.

Featuring the proven, compact MonoBlockdesign, the mill processes pickled stain-less-steel strip of the AISI 400 (ferritic)and AISI 300 (austenitc) grades in widthsof up to 1,370 mm and ingoing thick-nesses of maximum 6.3 mm.

Overall view of the MonoBlock mill stand.

MonoBlock with roll set.

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MonoBlock Stands

Design, procurement, manufacture andshop assembly were completed in just12 months. The MonoBlock was trans-ported to Italy in assembled state includ-ing baseframe and gearunit, installed in record time and put into operationseveral weeks ahead of the contracteddeadline.

The mill consists of two reversing coil-ers, one uncoiling station with levelerunit and a mobile crop shear to minimizethe nonproductive times during coilchanging. Fully automated control sys-tems for precise strip thickness and opti-mal flatness ensure cold-rolled finishedproducts of supreme quality. All rollingparameters are preset automatically by a mathematical model.

SMS Siemag’s supply package includedthe design, manufacture, erection and commissioning of the mechanical equipment including ancillaries such ashydraulic, rolling-oil, fire-extinguishingand fume exhaust systems.

Control stand.

MONOBLOCK STANDS

SMS SIEMAG

20-HIGH MILL STAND


Commissioning 2006

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.3 mm



Technical data

Stand type MB 22 B - 54”




Capacity 80,000 tpy

Technical features


- Crown adjustment for backup shafts B/C(prepared for backup shafts F/G)






25

Mill-stand drive side.

Stainless

Second 20-high mill

In 2005, TPSS Yuantong Stainless SteelWare Corporation had branched out intothe stainless-steel market, and just oneyear later ordered and commissioned afurther 20-high cold-rolling stand fromSMS Siemag. Representing the next stepin TPSS’s ambitious expansion program,this mill No. 2 boosted production byanother 80,000 tpy of stainless-steel strip with top quality.

Identical in design with stand No. 1, themill stand No. 2 serves to process pick-led stainless-steel strip with a maximumwidth of 1,350 mm and ingoing thick-nesses of up to 6 mm.

The “Zero-Crown” MonoBlock standsout for its high stiffness and is com -pleted by entry- and exit-side high-ten-sion reversing coilers as well as the necessary entry and exit equipment.

Mill productivity is increased by an addi-tional uncoiling station with pinch roll leveler allowing all preparatory work forthe next coil to be done while rolling isunderway.

Closest thickness tolerances and optimalflatness are ensured by adequate controlsystems. The mathematical model fullyautomatically controls all the parametersneeded for reliable and precise rolling.

TPSS YUANTONG STAINLESSSTEEL WARE, TPSS YUANTONG STAINLESSSTEEL WARE, China, Mill No. 2

Uncoiling station.

Total plant.

Exit section.

26

MonoBlock Stands

MONOBLOCK STANDS

SMS SIEMAG

20-HIGH MILL STAND


Commissioning 2006

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data





Capacity 80,000 tpy

Technical features


- Crown adjustment for backup shafts B/C and F/G






27

MonoBlock with reversingcoilers.

TPSS

LIANZHONG STAINLESS STEEL, LIANZHONG STAINLESS STEEL, ChinaMill No. 2

Second 20-high mill for

wide stainless-steel strip

Lianzhong Stainless Steel Corporation(Lisco), a subsidiary of Taiwan’s YiehUnited Steel Corporation, operates a pro-duction facility set up on a greenfield sitein southern China. Just like for its homelocation in Taiwan, the customer decidedto employ SMS Siemag’s proven 20-highstand technology and equipment at itsnew production operations in China.

In addition to the size-22 SplitBlockstand, SMS Siemag installed a secondcoldrolling mill in MonoBlock design inLisco’s plant. This MonoBlock standserves to process stainless-steel stripwith a maximum width of 1,600 mm andingoing thicknesses of up to 6 mm intohigh-quality cold strip.

The large-width stand block is of “Zero-Crown” design and features excellentstiffness at minimum mill spring underrolling load. For easier and less mainte-nance, the backup shafts are secured inthe stand block by means of a hydraulicsaddle clamping device.

Fully automated thickness and flatnesscontrol systems ensure precisely rolledcold strip with closest tolerances. Themathematical model from SMS Siemagautomatically presets all rolling parame-ters which are controlled online duringthe rolling process.

Stand block.

Preassembly and function test.

Hydraulic adjusting systems.

28

MonoBlock Stands

MONOBLOCK STANDS

SMS SIEMAG

20-HIGH MILL STAND

MonoBlock MB21BB-63”

Commissioning 2006

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical Data

Stand type MB 21 BB - 63”





Technical features


- Crown adjustment for backup shafts B/C(prepared for backup shafts A and D)





MonoBlock without rolls.

29

LISCO

TAIYUAN IRON & STEEL, TAIYUAN IRON & STEEL, China


30

Five 20-high mills for


Taiyuan Iron & Steel Co. Ltd. (Tisco),China’s leading stainless-steel producer,ordered a total of five 20-high mills fromSMS Siemag, representing the largestsingle order for 20-high roll stands everawarded to any supplier. All of the standscould be put on stream ahead of the con-tracted deadline. In addition to these five20-high mills, SMS Siemag, in 2005, sup-plied Tisco with an inline skin-pass millfor its hot-strip annealing and picklingline.

The MonoBlock cold-rolling facilities aredesigned to process very high coil weightsof up to 35 t with a maximum coil diame-ter of 2,400 mm.

All of the 20-high stands are providedwith high-tension reversing coilers onboth sides as well as the necessary entryand exit equipment. The first mill addi-tionally incorporates an uncoiling stationfor efficient and smooth processing ofhot strip coils with maximum strip thick-nesses.

To ensure closest tolerances, each of thecold-rolling stands features a thicknessand flatness control system. A mathe-matical model presets all rolling parame-ters which are controlled fully automati-cally during the rolling process.

Overall plant.

Stand platform withhydraulic control.

Mill stand with roll set.

MONOBLOCK STANDS

31

20-HIGH MILL STAND


Commissioning 2005

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data





Capacity 80,000 tpy

Technical features




- One stand with additional uncoiling station including pinch roll leveler for coil preparation




Shop preassembly.

TPSS YUANTONG STAINLESSSTEEL WARE, TPSS YUANTONG STAINLESSSTEEL WARE, China, Mill No. 1

First 20-high mill

for a “newcomer”

TPSS Yuantong Stainless Steel Ware Corporation, a new player on the Chinesestainless-steel market, is based in theTianjin Economic Development Area, ahigh-tech industrial park our customerchose for its top-notch production facili-ties. Among others, the park also accom-modates an Airbus assembly plant.

For moving into the production of high-quality stainless-steel strip, TPSS decidedto employ a 20-high cold-rolling mill whichserves to process pickled stainless-steelstrip with a maximum width of 1,350 mmand ingoing thicknesses of up to 6 mminto first-class cold strip. Proven planttechnology and equipment as well aseasy operation smoothed the way forproduction to succeed at this new loca-tion in China.


32

MonoBlock roll stand.

Uncoiling station. Stand with reversing coilers.

The heart of the mill is an MB22MonoBlock stand which is completed by two high-tension reversing coilersand an uncoiling station to reduce idletimes.

All rolling parameters are set by a math-ematical model and controlled fully auto-matically during rolling.

TPSS Tianjin Pipe Corporation Ltd. ranksamong China’s largest pipe makers andhas been cooperating closely with thecompanies of SMS metallurgy for years.So it came as no surprise that the cus-tomer chose SMS Siemag to expand itsproduct portfolio.

MONOBLOCK STANDS

33

20-HIGH MILL STAND


Commissioning 2005

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data





Capacity 80,000 tpy

Technical features


- Crown adjustment for backup shafts B/C and F/G


- Additional uncoiling station with pinch roll leveler for coil preparation




Roll set.

TPSS

20-high mill for German-

Chinese joint venture

Since 2001, Shanghai Krupp StainlessCo. Ltd. (SKS) has been producing high-quality stainless-steel strip of austeniticand ferritic grades on a 20-high coldrolling mill made by SMS Siemag. SKS is a joint venture between ThyssenKruppStainless and Baosteel for stainless-steel production in China.

Just like at its German operations in Krefeld, Benrath and Dillenburg,ThyssenKrupp decided to equip theShanghai plant with SMS Siemag’sproven 20-high stand technology andequipment.

The new mill in MonoBlock designenables the processing of pickled stain-less-steel strip with a maximum width of 1,340 mm and an ingoing thickness of up to 5 mm.

SHANGHAI KRUPP STAINLESS,SHANGHAI KRUPP STAINLESS, China


34

Main control pulpit.

Thickness measurement.

The works premises of SKS(Shanghai Krupp Stainless).

Uncoiling station.

To boost mill capacity, the cold-rollingstand incorporates an additional uncoil-ing station to reduce nonproductivetimes during coil changing.

The thickness and flatness control sys-tem is part of the stand automation andensures exact strip dimensions withclosest tolerances. All rolling parametersare preset and controlled fully automati-cally during rolling by means of a mathe-matical model from SMS Siemag.

MONOBLOCK STANDS

35

20-HIGH MILL STAND


Commissioning 2001

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 5.0 mm



Technical data





Capacity 80,000 tpy

Technical features








Flatness measuring roll.Roll set.

Stainless

ThyssenKrupp ACCIAI SPECIALI TERNI, ThyssenKrupp ACCIAI SPECIALI TERNI, Italy, Mill No. 6

Large 20-high mill for

wide stainless-steel strip

In order to be able to roll also wide stripat its Terni location, the customer onceagain decided in favor of technology andequipment made by SMS Siemag.

The 20-high mill in the proven, compactMonoBlock design processes stainless-steel strip in widths of up to 1,575 mmand ingoing thicknesses of max. 5 mm.

The stand block in “Zero-Crown” designfeatures maximum rigidity at minimummill spring under rolling load.

It is the sixth 20-high cold-rolling mill thatSMS Siemag has built for this customer.

For easier replacement, the backupshafts are secured in the stand block bymeans of a hydraulic saddle clampingdevice. The mill is provided with a fullyautomatic thickness and flatness controlsystem. All rolling parameters are presetby a mathematical model and controlledonline during operation.

In this mill, the coils to be rolled are intro-duced into the process directly at thereversing coiler so that no extra moneyhad to be spent on an uncoiling station.


36

MonoBlock mill stand.

Roll changing.

MONOBLOCK STANDS

37

20-HIGH MILL STAND

MonoBlock MB21BB-62”

Commissioning 2000

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 5.0 mm



Technical data

Stand type MB 21 BB - 62”





Technical features


- Crown adjustment for backup shafts B/C(prepared for backup shafts A and D)





SUPAFINE® filtration system

Stainless

18-high stand for


In addition to its two 20-high stands fromSMS Siemag, Yieh United Steel Corpora-tion contracted us to supply an 18-highcold-rolling mill. This roll stand representsan innovative type of rolling facility whichSMS Siemag has added to its portfolio ofmodern stand equipment and technology.

A special feature of the 18-high conceptare the slim work rolls with a diameter of 120 mm. Horizontal support by meansof adjustable supporting roller bridgesensures that the work rolls are laterallystabilized during the rolling process.

The mill stand also incorporates an HSshifting system for the work rolls as wellas an axial shifting and bending systemfor the intermediate rolls. All actuators

YIEH UNITED STEEL,

18-High StandsSMS SIEMAG

Schematic representation of the 18-high rolling mill.

Laterally supported work rolls.

38

YIEH UNITED STEEL, Taiwan

18-high roll setup.

or control elements for roll-gap settingallow to process a whole range of differ-ent hot-strip grades into high-qualitycold-rolled products. Thanks to a fullyautomated thickness control system, thestainless-steel strip produced featuresprecise dimensions. All rolling parame-ters are preset by an electronic databasesystem for many different rolling pro-grams and pass schedule strategies.

Mills of this type can be operated inreversing mode and as inline stands forrolling scale-affected hot strip or conven-tional cold strip. In integrated rolling,annealing and pickling lines, 18-high rollstands in tandem arrangement form thetechnological unit for thickness reduc-tion.

Preassembly and function test.

18-HIGH STANDS

39

18-HIGH MILL STAND

ZR613A-52”

Commissioning 2007

Production data

Material stainless-steel

hot strip

AISI 300 and

400 series


Strip thickness

ingoing max. 6.5 mm

outgoing 1.5 mm


Technical data

Stand type ZR 613 A - 52”

Rolling speed max. 500 /min



Capacity 80,000 tpy

Technical features


- HS shifting for the work rolls

- Intermediate-roll shifting system

- Intermediate-roll bending system

- Emulsion system for cooling and filteringthe coolant-lubricant used

- Electronic database system for presetting all rolling parameters

- Thickness control systems

YUSCO

SMS SIEMAG AG

Hot Rolling Mills/ Cold Rolling Mills Division

Wiesenstrasse 3057271 Hilchenbach, Germany

Phone: +49 (0) 2733 29-1800Telefax: +49 (0) 2733 29-1782

E-mail: [email protected]: www.sms-siemag.com

SMS SIEMAG AG

Strip Processing Lines DivisionTechnical Sales Stainless Steel

Walder Strasse 51-5340724 Hilden, Germany

Phone: +49 (0) 211 881-5100Telefax: +49 (0) 211 881-5200

E-mail: [email protected]: www.sms-siemag.com

MEETING your EXPECTATIONS

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“The information provided in this brochure contains a general description of the performance characteristics of the products concerned. The actual products may not always have thesecharacteristics as described and, in particular, these may change as a result of further developments of the products. The provision of this information is not intended to have and willnot have legal effect. An obligation to deliver products having particular characteristics shall only exist if expressly agreed in the terms of the contract.”

multiroll mill stands for stainless-steel...

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