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2010 September Issue
Full Table of Contents
Long Product Technologies
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About the Cover
The cooling bed area at the Gerdau Ameristeel mill in Petersburg, Va., USA. Gerdau Ameristeel is the second largest minimill steel producer in North America, with annual manufacturing capacity of approximately 10 million tonnes of mill finished steel products. Through its vertically integrated network of minimills, scrap recycling facilities and downstream operations, Gerdau Ameristeel serves customers throughout the United States and Canada.
Photograph by MP Fotos – Eduardo Simoes.
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Technical Features Table of Contents |
| 37 |
Beam Me Up!
The New Medium Section Mill at Steel Dynamics, Columbia City
Dennis Black, manager — rolling and finishing, medium section mill, Steel Dynamics Inc., Columbia City, Ind. (dennis.black@steeldynamics.com); Ulrich Svejkovsky (left), vice president — long product mills, Elmar Krieg, general manager — long product mills, and Ulf Höltge, project manager, SMS Meer GmbH, Mönchengladbach, Germany (ulrich.svejkovsky@sms-meer.com, elmar.krieg@sms-meer.com); and Mario Fabro (right), sales manager — long products, SMS Meer Service Inc., Cranberry Twp., Pa. (mario.fabro@sms-meer.us)
The new 600,000 tons/year medium section rolling mill at Steel Dynamics is a 15-stand continuous mill that features innovative technologies for rolling and processing. SMS Meer supplied a highly efficient walking beam reheat furnace.
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| 44 |
Diamond Pass Design for Single Family Bar Rolling
Sven-Erik Lundberg, senior consultant, Hatch Ltd., Mississauga, Ont., Canada (slundberg@hatch.ca), and Matthew Allen (pictured), engineering consultant, Advanced Steelworks Inc., Toronto, Ont., Canada (mallen@advancedsteelworks.com)
Single family rolling has not yet been successfully applied to bar rolling. By a series of 97° diamond grooves, a reduction capacity equal to oval–round is obtained. The downtime for dimensional changes is reduced thanks to the diamond design.
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53 |
“Rebar Hopping”: A Review of the High-Productivity Mills in Europe and Asia
Lorenzo Cavaletti, manager — proposal department, Federico Castellani, manager — engineering, and Filippo Verlezza, area manager — sales, SMS Meer SpA, Tarcento, Italy (l.cavaletti@sms-meer.it, f.castellani@sms-meer.it, m.asquini@sms-meer.it); and Mario Fabro (pictured), sales manager — long products, SMS Meer Service Inc., Cranberry Twp., Pa. (mario.fabro@sms-meer.us)
Worldwide demand for reinforced steel bar is growing, fueling more interest among steelmakers in this basic product. This paper reviews some of the newest mills that have met the challenge of high productivity with low operation and investment costs. |
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Update on Regenerative Reheat Furnace Conversions in North America
Valerie Wentling, The Timken Co., Canton, Ohio (valerie.wentling@timken.com); David Evans (left), Evraz Inc. NA, Regina, Sask., Canada (devans@ipsco.com); Steve Swan (center), Nucor Steel Marion Inc., Marion, Ohio (sswan@nsmarion.com); and Anthony G. Fennell (right), Western region manager, Bloom Engineering Co. Inc., Pittsburgh, Pa. (tfennell@bloomeng.com)
Driven by increases in costs of fuel and growing production demands, the pace of regenerative reheat furnace conversions has quickened across North America. The current status of regenerative technology is reviewed, with a focus on retrofit applications in reheat furnaces. |
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Quality Improvements in Structural Round Bar
H. Yoshikawa, O. Asanari, K. Honda, M. Muraoka, and M. Minami, Himeji Works, Godo Steel Ltd., Japan
To satisfy quality demands, causes of defects in structural round bar were investigated, and various measures in production processes were taken. As a result, defects have been decreased and yield has improved. This report focuses on the most effective measures. |
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