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Analysis of Spalling in Roughing Mill Backup Rolls of Wide

In this paper the spalling causes of backup rolls in a roughing mill of a hot strip rolling mill were investigated The roughing mill withstood extreme service conditions with long service cycles for backup and work rolls a large variety of the same width rolling campaigns severe and non‐uniform wear contours of backup and work rolls Get price Get Price

An investigation on the roll force and torque fluctuations

the rolling process especially in a cold strip mill If the thickness variation of the hot-rolled aluminum strip can be reduced it will be possible to increase the production speed of the cold strip mill These claims set new demands on the acceptable rolling forces and torques which together with the roll pass design have a significant Get price Get Price

Understanding Rolling Process in Long Product Rolling Mill

Nov 27 2015Understanding Rolling Process in Long Product Rolling Mill Steel rolling consists of passing the material usually termed as rolling stock between two rolls driven at the same peripheral speed in opposite directions (i e one clockwise and the second anti-clockwise) and so spaced that the distance between them is somewhat less than the Get price Get Price

UDC 531 717 2 681 3 621 771 23 016 2

the strip shape and crown at the exit from the final rolling stand are concerned they have come to be accurately controlled to respective target levels 1) However even if a hot-rolled strip has a desired shape at the exit from the final rolling mill stand its shape changes during cooling on a run out table coiling on a down coiler and Get Price

How to avoid slit

Mar 07 2006The edges of a slit-in cambered strip are different from side to side For example one edge might be good but the other too tight Crossbow Like camber crossbow might be caused by a defect in the master coil or from the slitting process Usually crossbow is caused by too much overlap (vertical clearance) or by stripper rings that are the Get price Get Price

Advanced Reversing Cold Mills by Primetals Technologies

Also strip flatness measuring equipment mounted at one or both ends of the mill combined with -zone work-roll cooling to meet the highest demands for flatness Two-stand reversing cold mills Primetals Technologies' two stand reversing cold mills combine the flexibility of single-stand reversing mills with the capacity of conventional coil-to-coil tandem mills at substantially reduced investment costs Get Price

Arcelor Mittal

Nov 29 2011Arcelor Mittal - Cleveland 84 Hot Strip Mill Revamp 1 Arcelor Mittal - Cleveland 84" Hot Strip Mill Revamp 2 A-M Cleveland Hot Mill 7 Stand Finishing Train 72 000 HP 5 Stand Roughing Train 56 000 HP 2 Downcoilers 1000 HP each 3 Pusher Type Furnaces 450 Tons/Hour Each Width 26" to 72" Thickness 0 056" to 0 700" Capacity 3 Million Tons/Yr Get price Get Price

Rolling Technology for Thin Steel Strip in Hot Strip Mill

2 Study with a continuous hot steel strip rolling 2 1 Calculation model for hot steel strip rolling The hot strip mill shown in was assumed as a Fig 1 calculation model for analysis This facility consists of one rougher and six finishing stands Table 1 shows the rolling conditions (Case-R) based on the assumption that low carbon steel Get price Get Price

Roll Bearing Arrangement of a Rough

Company The Schaeffler Group is already making a decisive contribution to "Mobility for Tomorrow" today with its high-precision components and systems in engine transmission and chassis applications in addition to rolling and plain bearing solutions for a large number of industrial applications Get Price

Dynamic modelling and simulation of a hot strip finishing mill

Hot rolling is an essential industrial process in the production of sheet steel a widely used product in manufacturing and construction A finishing mill performs a set of operations in a hot strip rolling mill and is a complex unit including many processes and control loops Get price Get Price

Rolling conditions in hot strip mills and their influence

To understand rolling conditions in hot strip mills rolling schedules from different hot mills were analysed The schedules were taken from two continuous mills (4 and 5 roughing stands respectively) one -/a continuous mill (one two high rougher with 7 passes plus two continuous roughing stands) and one semi-continuous mill (four Get Price

Hot Strip Mill Edger Rolls Metal Metal Made Products

Jasbir Engineering Co has developed a special hot working die steel grade specifically for use for the hot strip mill edger rolls This material with its high thermal fatigue strength and its excellent resistance to firecracking has proven to improve campaign life and Get Price

Tata Steel upgrades Hot Strip Mill in Port Talbot

The reversing rougher is believed to be the most powerful in Europe with two new 12 5 MW motors each equivalent to 17 000hp or the power of about 150 cars The upgrade of the Hot Strip Mill follows investments totalling more than 250 million in state-of-the-art steelmaking and processing technology at the South Wales operations Get price Get Price

Method and device for cooling rough strip or metal blank

EFFECT improved cooling of rough strip or strip 4 in hot rolling mill with rolls 6 7 11 cl 3 dwg The invention relates to a method and device cooling blister strip or band of metal workpiece in a hot rolling mill equipped with working rolls wherein the cooling means is applied to the blister strip or band spray Get price Get Price

Hot Strip Mill Reversing Rougher Mill Study – Intekno

Hot Strip Mill Reversing Rougher Mill Study Yer Ereğli-TURKEY İş veren Erdemir Proje Tanımı Detection and correction of the causes of the movements of the rough rolling coils of the reversal by the UEC firm In Place Machining company performed rolling survey and measurements Rail Mill Project Hot Strip Mill Finishing Stands Get Price

Steel Manufacturing Plant CASE STUDY

the steel plant's hot strip mill building Zimpher worked with the company and their installing contractor to custom design a fan solution to satisfy the ventilation requirements while overcoming the accessibility issue The plant can now access the new fan to perform preventive maintenance or make repairs if they become necessary Get Price

Hot Strip Mill

John G Lenard in Primer on Flat Rolling (Second Edition) 2014 3 5 Friction and Wear Work rolls in hot strip mills wear due to friction between the roll surface and hot strip (Back-up rolls wear as well but under pressure with elastic deformation the friction is much less except for the high work roll roughness in the last stand of a sheet rolling tandem cold mill) Get price Get Price

Strip Mill Products

Heavy Strip Mill Products (3mm - 15mm) As one of the first companies in the country to install heavy strip mill operations we still offer one of the widest ranges of hot rolled processing facilities in the UK Cut to length Decoilers processing a thickness range of 3mm - 15mm 2000 x 15mm SEKO MACHINE 2000 x 12 5mm BRONX MACHINE Get Price

Reverse Engineering Strange Devices Found in a Library

Nov 15 2018Reverse Engineering Strange Devices Found in a Library Gareth Branwyn Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media He is the author or editor of over a dozen books on technology DIY and geek culture He is currently a contributor to Boing Boing Wink Books and Wink Fun Get Price

THE WORK ROLL SURFACE DAMAGING STUDY A KEY

The Hot Strip Mill (HSM) at Siderar is a continuous mill composed by 3 roughing stands (R2-R3-R4) and 6 stands like finishing group (F5 – F6 – F7 – F8 - F9 - F10) In this mill the stand R4 can be considered as the first stand of the finishing mill even if it does not work in Get Price

British Library EThOS An investigation into the influence

Finite element techniques have been used to decouple some of the major causes of strip curvature during the roughing stages of Port Talbot hot strip mill A plane strain elastic-plastic finite element model is developed and applied to predict the direction and severity of strip curvature caused by asymmetrical factors at each pass of the rougher Get price Get Price

Identification for control of the process parameters

Jul 01 2012Read Identification for control of the process parameters influencing tertiary scale formation at the hot strip mill using a binary choice model Journal of Materials Processing Technology on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips Get Price

High Quality Production Technology at the Chiba Works No

This is the first fully continuous hot strip mill in the world To satisfy customer demands for the improvement of product qualities the mill has the following features (1) A high skid button was installed in reheating furnace to remove skid marks (2) High speed processing hydrauric edgers and long side guides were introduced in rougher mill Get Price

HOT ROLLING PRACTICE – An Attempted Recollection

classed as sheet also called strip (thickness less than 3 mm ) or plate (thickness more than 3 mm) In profile rolling the final product is either a round rod or other cross sections shaped products such as structural sections (beam channel joist rails etc) The initial breakdown of ingots into blooms and billets is done by hot-rolling Get price Get Price

Our mills

wide hot strip mill E2/R2 reversing rougher in the hot strip mill 3 walking beam furnaces in the hot strip mill finishing mill with seven rolling stands in the hot strip mill 2 cold rolling mills continuous annealing section 2 pickling lines coupled to modernised tandems 3 hot dip galvanising lines Get price Get Price

Upgrading of Hot Finishing Mill to 4

hot-rolled coils thereby effecting pass cutting in the cold-rolling process 3) To realize a high-productivity hot-rolling mill by replac-ing the computer control system with one of the latest design that achieved a significant degree of automa-tion The expansion of the hot finisher to 4 stands which was Get price Get Price

Dynamics and Variance Control of Hot Mill Loopers

Fig 1 Layout of a semi-continuous hot strip mill with 1 reversing rougher mm or even less and its length may well exceed a kilometer While the strip properties such as centerline gauge width proflle and temperature must be precisely controlled to meet product requirements these properties are only Get Price

Corrosionpedia

A reversing mill is a rolling mill in which the workpiece is passed forward and backward through a pair of rolls The reversing mill is so named because the steel runs back and forth between the rollers reducing the thickness incrementally with each pass A reversing mill can be used to reduce material to gauge Get price Get Price

Identification for control of the process parameters

Jul 01 2012Read Identification for control of the process parameters influencing tertiary scale formation at the hot strip mill using a binary choice model Journal of Materials Processing Technology on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips Get Price

Work Roll change in a Hot Rolling Mill ( especially in a

Dec 13 2013Work Roll change in a Hot Rolling Mill ( especially in a steel industry) E3 piston rod 20 mm forward in contrast to E2 (automatic release of the hook) Pos E4 switch over to slow reverse WR-set run out of the mill stand Pos E5 switch over to slow forward WR-set run back in the mill stand Pos E6 lower position for top WR in mill stand Pos Get Price

13

84 The Improvement of High Pressure Descaling Efficiency to Lower Furnace Temperature and Reduce Fuel Consumption in China Steel N o 1 Hot Strip Mill Fig 7 The comparison of water consumption between the before modification and after modification in descaling Fig 8 The achievement of reducing furnace temperature (SRT) and Rougher Mill temperature drop (SRT-R4DT) Get price Get Price

Strip Width Calculation for Tube Mills Pipe Mills and

Disclaimer The above information is an estimate only and should be treated as such Due to different variables on different mills the width(s) calculated are strictly approximate and should be proven out before ordering an abundant supply Get Price

Dynamics and Variance Control of Hot Mill Loopers

Layout of a semi-continuous hot strip mill with 1 reversing rougher mm or even less and its length may well exceed a kilometer While the strip properties such as centerline gauge width proflle and temperature must be precisely controlled to meet product requirements these properties are only Get price Get Price

Study and Application of SSC Model on Hot Rolling Wide

According to cutting loss of the head and the tail of hot rolling wide strip mill for the loss of width the control conditions the control mode and control model of short stroke control (SSC) of the rough mill are researched and given by dynamical changing the rough mill roll gap for SSC simulation and basing on infinite element method (FEM) analysis and results Get price Get Price

Rolling conditions in hot strip mills and their influence

To understand rolling conditions in hot strip mills rolling schedules from different hot mills were analysed The schedules were taken from two continuous mills (4 and 5 roughing stands respectively) one -/a continuous mill (one two high rougher with 7 passes plus two continuous roughing stands) and one semi-continuous mill (four Get price Get Price

An Expert PI Controller with Dead Time Compensation of

Hot strip rolling production is a high-speed process which requires high-speed control and communication system but because of the long distance between the delivery stand of the finishing mill and the gauge meter dead time occurs when strip is transported from the site of the actuator to another location where the gauge meter takes its reading which seriously affects the thickness control Get price Get Price