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how to reverse the rougher in a hot strip mill:

New Rolling Method R f Reversing Cold Rolling Mill

Key words: Zoom-MillTM, Off-gauge, Minimization, Yield, Productivity, Leader strip, Spot welding INTRODUCTION For production of cold rolling steel strips in the size of yearly production capacity ranged from 150 to 300 thousands tons, a reversing cold rolling mill, which takes relatively inexpensive capital investment, is put into use.

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In the top or tail portion of a hot strip, a local contraction of width unavoidably occurs, called “width necking” or simply “necking”. The amount of necking is determined mainly by the conditions of rougher rolling in the hot-strip mill. In this paper, the mechanism

MODERNIZATION OF HOT STRIP MILLS - SMSgroup

Dunkirk hot strip mill. This modernization measure ensures the operational reliability of the drive train, prepares the mill for a future extension and reduces mill maintenance. The rougher R5 is the last of four non-reversing stands in the five-stand roughing mill of ArcelorMittal’s hot strip mill in Dunkirk, France.

Examination of Slab Temperature Change, Rolling Power and ...

A mathematical model is proposed for the mill arrangement equivalent to semi continuous type in a hot strip mill. The rolling schedule is arranged so that a slab is rolled from 230 mm into 60 mm in bar thickness by 3 passes roughing with only one reverse mill and 60 mm into 1.2 mm, 2.0 mm,

Rolling conditions in hot strip mills and their influence ...

in hot strip mills, slabs of 1 50 to 250 mm thick are rolled to strip 1.5 to 12 mm thick. Conventional hot strip mills consist of roughing and finishing stands. The configuration of the roughing mills varies widely. A mill with one reversing stand is called a semi-continuous mill. A mill with one reversing stand

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John G. Lenard, in Primer on Flat Rolling (Second Edition), 2014 2.7 Generation III – Coil Box Hot Strip Mills. In the 1970s, Stelco of Canada developed the hot coil box designed for installation in hot strip mills ahead of the finish mill for coiling the transfer bar from the roughing mill and uncoiling it into the finishing mill. The coil box reduced the distance between the roughing mill ...

Hot strip mill mathematical models and set-up calculation ...

This setup calculation was applied to a New Zealand hot strip mill, which consists of a reversing rougher and a four-stand finishing mill. With this configuration, strip was successfully rolled with a finished thickness of 2 mm and a width of 1250 mm. >

The Hot Rolling Process - California Steel

The Hot Rolling Process The primary function of the Hot Strip Mill is to reheat semi-finished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77,000 hp, and finally coiling up the lengthened steel sheet for transport to the next process.

Width necking at the rougher in a hot-strip mill ...

Abstract The accuracy of the width of a hot strip is very important for the improvement of yield, both for the steel maker and the steel user. One of the important technical problems concerning width accuracy is securing a final hot strip with uniform width along the whole length. In the top or tail portion of a hot strip, a local contraction of width unavoidably occurs, called “width ...

steel - Hot strip | Britannica

For example, a semi-continuous hot-strip mill has only one reversing rougher in front of the finishing train. Another rolling system goes even farther and uses one four-high reversing rougher and one four-high reversing finishing mill, with hot-coiling boxes in front and in back of the finishing mill. (Hot coilers operate in a furnace to keep ...

What is a Reversing Mill? - Definition from Corrosionpedia

Nov 28, 2017 · The purpose of the reversing mill is to reduce the thickness of the steel to the customer’s specifications. The hot roll band passes back and forth between the rolls until it reaches the specified thickness. Benefits of reversing mills include: Flexible, low-cost rolling of a wide range of products. Tight strip thickness and shape tolerances.

A BASIC UNDERSTANDING OF THE MECHANICS OF

Secondary scale on hot strip and the impact on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest - also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

The method of hot rolling thin strips and mill for its ...

The invention relates to a method of hot rolling a thin strip mills, containing draft reversing rolling mill and finishing mill group with penimi coilers. There is a method of production of hot rolled strips for semi-continuous mill (U.S. patent No. 3803891, MKI 21 1/32). The mill, which implements this method contains: furnace for heating slabs;

Automated method and apparatus for polishing hot strip ...

The projected cost for a new, state-of-the-art hot strip mill is between 500 million and one billion dollars. It can take five to seven years to complete the construction of a new mill. In view of these costs, there are presently no known plans to build a new hot strip mill anywhere in the world.

Everything you need to know about flatteners and levelers ...

Oct 10, 2002 · Then, as the cold mill gap is adjusted to reduce the crown, the coil also will come out flat--if the hot mill got the relationship between crown and flatness right to begin with. If the cold mill rolls or hot mill coils have too much crown, the mills will roll out

BLAST FURNACE, STEEL WORK, AND ROLLING AND FINISHING MILL ...

ROUGHER 613.362-018 Rougher, Bar Mill 613.362-018 Rougher, Hot-Strip Mill 613.362-018 Rougher, Merchant Mill 613.362-018 ROUGHER OPERATOR 613.662-014 sampler 509.584-010 SAMPLER 599.684-014 Sampler, Ovens 599.684-014 SATURATOR OPERATOR 558.362-018 scale-and-skip-car operator 921.683-062 SCARFING MACHINE OPERATOR 816.682-010 Scrap Baler

US5150597A - Hot strip plant - Google Patents

In a hot strip plant including a reversing roughing mill and a reversing finishing mill having coiler/uncoilers in front and at the back thereof, the objects of the invention described above can be accomplished by a hot strip plant which is characterized in that the reversing roughing mill and the reversing finishing mill are disposed at such a ...

Influence of roll speed mismatch on strip curvature during ...

In these investigations, finite element techniques have been used to determine the effect of roll speed mismatch on the direction and severity of strip curvature in the roughing stages of a hot mill.

HIGH PRODUCTIVITY IMPROVEMENT IN JFE FUKUYAMA NO.1 HOT

Jan 01, 2005 · Productivity improvement technologies we developed at Fukuyama Hot Mills are, high accuracy temperature tracking from entry side of reheating furnaces to finishing mill, automatic reheating furnaces control system, and mill pacing control.

A new steel plant complex for SDI Setting new benchmarks ...

At the same time, the design of this mill allows the produc - tion of high quality thin strip, down to a minimum strip thick-ness of 0.047 in (1.2 mm), as well as API hot strip grades with thicknesses of up to 1 in (25.4 mm). Even thinner final strip thicknesses are possible with this plant concept.

Feedback Control for Hook Camber Strip Mill

Hot strip mill no. 1 of thyssenkrupp Steel Europe consists of 2 roughers, the first is called R1, the second one called Z3. ... While the first rougher is considered to perform several reversing ...

MODELLING OF WIDTH CONTROL FOR HOT STRIP MILL

continuous slab caster feeding a hot strip mill is limited. This has increased the requirement for width reduction in the hot strip mill rolling stands. The width of a slab can be reduced using vertical edger rolling stands in the roughing mill section and by using a slab sizing press.

Rivers of Steel- Workers and Jobs

Plate Mill Salt thrower: throws salt on slabs to remove scale as they enter the plate mill rolls; Bar Mills Rougher: sets up, adjusts, and regulates the rolls and guides on a continuous roughing train of a bar mill; Bar catcher: catches the bar from one roll stand, loops

Automated method and apparatus for polishing hot strip ...

The projected cost for a new, state-of-the-art hot strip mill is between 500 million and one billion dollars. It can take five to seven years to complete the construction of a new mill. In view of these costs, there are presently no known plans to build a new hot strip mill anywhere in the world.

US Patent for Semi-continuous hot rolling of metal strip ...

A wide plate mill comprising a reversing breakdown stand with turn-arounds and a reversing finishing stand arranged in the same way as the strip and light plate mill may be added on the other side of the heating furnaces, so utilizing some of the cooling facilities of the strip and light plate mill.

Process Parameters Influencing Tertiary Scale Formation at ...

May 24, 2012 · More importantly, for process control it was found that to keep the rate of coils containing medium or high scale counts below 10%, the average rougher mill temperature should be kept at 1020 °C or less, or alternatively the aluminum content should be kept below 0.024% wt when running the hot mill at the mean values for all the other process ...

Waterbury Farrel Rolling Mills

* Rapid roll opening in case of strip break 20 High Cold Rolling Mills Mill Type Work Roll Diameter (Nom.) Backing Bearing Diameter Strip Width, Max. Typical Product Minimum Gauge Narrowest Mill Widest Mill Inch mm Inch mm Inch mm Inch mm Inch mm ZR-32 0.250 6.35 1.875 47.63 4.25 105 7.25 180 Ultra-thin foil nonferrous, high carbon, stainless ...

ENHANCING ENERGY COST EFFICIENCY OF HOT ROLLING

two tendencies reverse, theoretically at optimal target reheating temperature the sum of unit energy consumption of reheating and forming is minimal [4]. 2. COLLECTING AND ANALYZING DATA Great number of data can be obtained in relation with forming in the company group’s hot rolling mill quality management system.

Steel process flow_lines - SlideShare

Nov 05, 2010 · The primer-coated strip passes into a baking oven to cure the primer and then into a cooling zone. The strip is then conveyed to the sec- ond paint coater where the finish coating is applied to both surfaces with reverse roller coaters. The strip then enters another oven for curing and cooling. FAY-OFF REELS F'FlE-TREATMENT 9.

Rolling (metalworking) - Wikipedia

Hot rolling is a metalworking process that occurs above the recrystallization temperature of the material. After the grains deform during processing, they recrystallize, which maintains an equiaxed microstructure and prevents the metal from work hardening.The starting material is usually large pieces of metal, like semi-finished casting products, such as slabs, blooms, and billets.

Silviu TUDORACHE - CTO MILLS - Liberty Galati | LinkedIn

Head of Hydraulic Sector Hot Strip Mill. ArcelorMittal Galati. sept. 2000 - iul. 20098 ani 11 luni. Responsabil cu intretinerea si repararea instalatiilor de actionari hidraulice si ungere in Laminorul de Benzi la Cald. Peste 20 de oameni in subordine. Gestionarea unui buget de `800,000 Euro/An.

How to Mill Lumber - The Wood Whisperer

Dec 10, 2006 · Obviously this stuff can be tricky to explain so the best way to understand is to do. Head to the shop and mill the board exactly as you initially described. With both edges jointed and both faces smooth and planed, trim a strip off the edge at the table saw. If the two edges are perfectly parallel, that cut off strip should be even thickness.

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Hot Rolled Products Analyst Site Visit Port Kembla

Hot Strip Mill 2.4Mtpa Plate Mill 0.3Mtpa Cold Mill 0.5Mtpa Slabs to Coated Products Western Port and to export Hot Rolled Coil to Coated Products Springhill & Export Markets ... Rougher Coil box Finisher 1-10mm thick Coiler 500-800 m Run out table cooling Strip Casting 15-150 m/minute Scale Control Chamber 20-40 metric ton coil 0.7 - 1.8 mm ...