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2011 April Issue
Full Table of Contents
Iron Production Technologies |
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About the Cover
Honoring the legacy of former Gallatin Steel president Don B. Daily, Gallatin associates continue on the journey to make Gallatin a "Zero Incident" workplace. Pictured on the corner of Safety Way and Don Daily Blvd. are (left to right): Josh Petroff, shift manager, casting; Dave Hassfurder, bricklayer, meltshop; Aaron Cayton, raw materials entry, material handling; Dave Cozart, crane maintenance, plant services; and Jacob Lock, second helper, meltshop. Gallatin Steel, located on the banks of the Ohio River in Ghent, Ky., is a flat-rolled carbon steel producer employing 450 associates. (See page 38 for information on the Don B. Daily Memorial Fund.)
Photo courtesy of Gallatin Steel.
Full magazine available in the Members Only Area |
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Technical Features Table of Contents |
| 41 |
Numerical Investigation and Optimization of a Venturi Scrubber
Bin Wu (top left), Dezhi Zheng (top right), Nianwen Chen and Chenn Q. Zhou (bottom left), Department of Mechanical Engineering, Purdue University Calumet, Hammond, Ind. (qzhou@calumet.purdue.edu); and Dennis Lu (bottom right), senior research engineer, ArcelorMittal Global Research & Development, East Chicago, Ind. (dennis.lu@arcelormittal.com)
A three-dimensional CFD model was developed to simulate the three-phase flow in a venturi scrubber. The simulation results present detailed flow characteristics and particle distributions, providing insight into optimization of the scrubber and reduction of wear on the sidewalls. |
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| 52 |
Your Employees Use Fall Protection, but Are They Really Safe From Harm?
Arnold Timothy Galpin, SPANCO Inc./Rigid Lifelines, Morgantown, Pa. (agalpin@spanco.com)
This paper reviews the latest in fall protection products and standards to help protect workers from injury in any “fall from height.” Proper hazard analysis, equipment choices and rescue plans can allow workers to safely return to work immediately after such falls. |
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61 |
Process Integration as a Tool for Decision Makers in the Steel Industry
Christer Ryman, director, Centre for Process Integration in Steelmaking (PRISMA), and manager — Process Integration Group, Process Metallurgy Department, Swerea MEFOS AB, Luleå, Sweden (christer.ryman@swerea.se)
This paper describes the most recent methods developed for simulation and optimization of integrated iron and steelmaking systems. The tools can be used to quickly manage changes and decisions in large-scale, complex industrial settings. |
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70 |
Totally Controlled Safety System With Zero Impact on Productivity for a Bar Rolling Mill
Marco Capitanio, commercial manager, Automazioni Industriali Capitanio, Odolo (Brescia), Italy (marco.capitanio@aicnet.it)
The new state-of-the-art safety system implemented at the bar rolling mill of Ferriera Valsabbia, Italy, based on a certified platform, includes fixed and sliding security shields, electric locks and dedicated keys, partitioning devices for different mill areas, and many more safety features. |
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81 |
Operation Results of the New Waste Gas Treatment Facility at ROGESA’s No. 2 Sinter Plant — The EFATM Process
Walter Hartig (pictured), general manager ironmaking, Dillinger Hüttenwerke, Dillingen, Germany (walter.hartig@dillinger.biz), and Franz Reufer, managing director, Paul Wurth Umwelttechnik GmbH, Essen, Germany (franz.reufer@paulwurth.com)
Paul Wurth’s Entrained Flow Absorber (EFA) technology for waste gas treatment is ideal for sinter plant desulfurization, dedusting and dedioxination, as it fulfills the strict environmental restrictions in many countries all over the world. |
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249 |
Reduction of Ridge Buckles in Cold Rolled Strip by Using Mill Stands of Different Local Rigidity
Yuli Liu, manager of process engineering and development, Ying Zhou, Jian Fan and Mike Levick, Quad Engineering Inc., Toronto, Ont., Canada (y.liu@quadeng.com)
Quad Engineering developed software to simulate the formation of ridge buckles in cold rolling. Through the simulation, it is found that the ridge buckles can be reduced through use of upstream mill stands with higher local rigidity and/or downstream mill stands with lower local rigidity. The “local rigidity” of a mill stand is a new term introduced here, which denotes the capability of a mill stand to resist local work roll flattening. Further analysis shows that this finding is applicable to all shape defects in general, and the shape defects have self-cure capability, which is sensitive to local rigidities of the mill stands. The shape defects’ “self-cure capability” is another new term introduced here, which denotes that the capability of the strain energy in latent shape defects tends to release itself in the subsequent rolling passes. The shape defects’ self-cure capability and its sensitivity to local rigidity are particularly useful in reducing ridge buckles. Based on these findings, several new methods to reduce ridge buckles are proposed, such as using the first stand of significantly higher local rigidity, using the last stand of significantly lower local rigidity, and using an additional stand of very high local rigidity upstream of a cold mill. The effectiveness of the proposed methods is compared through simulation. Use of a skinpass mill with very high local rigidity for flattening the ridges before cold rolling is the most effective of the proposed methods. Since the local rigidity of existing skinpass mills is similar to those of typical cold mills, they are not suitable for this application. To fulfill this new application, a new ridge-flattening skinpass mill is developed. |
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