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March
2008
Vol. 5, No. 3
Pre-Show Issue for AISTech 2008 plus Iron Production Technologies
About the Cover
Graycor Industrial Constructors Inc. recently completed the rebuild of Blast Furnace “C” at SeverStal North America’s Dearborn, Mich., plant. The new furnace was preassembled and erected in five major lifts — with each lift ranging from 200 to 500 tons — utilizing the largest cranes available in North America to hoist the sections. The fast-paced design build project included a 100-day shutdown that was completed ahead of schedule in less than 98 days.
Photo courtesy of Graycor.
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31
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New Challenge in the Casthouse Operation at ThyssenKrupp Steel
Michael Peters (top left), senior vice president, Peter Rüther (top right), head of blast furnaces Schwelgern — manager, Peter Schmöle (bottom left), head of technology — senior manager, and Wolfgang Wiese (bottom right), head of blast furnaces Schwelgern — senior manager, Hot Metal Production, ThyssenKrupp Steel AG, Duisburg, Germany (peter.ruether@thyssenkrupp.com)
In addition to choosing an optimized refractory material, ThyssenKrupp Steel undertook extensivetechnical measures in the total casthouse area with the aim of improving economical efficiency. The casthouse improvements, and strategic ideas for future improvements, are shown. |
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38
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Dawes Lane Coke Ovens, Corus UK — Recovery From Catastrophic Loss of Services
Nick Willerton, manufacturing manager (batteries), Corus Construction and Industrial, Scunthorpe, United Kingdom (nick.willerton@corusgroup.com)
When a forklift truck collided with a support structure for steam supply mains to the Dawes Lane Coke Ovens, all the steam supply mains were severed. Mobile steam generation was used to restore steam supply after 82 hours, and normal battery operations resumed one month after the incident. |
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47
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Blast Furnace Cooling: A North American Perspective
Peter D. Sortisio (left), metals technology group, ATSI Inc., Amherst, N.Y. (sortisio@atsiinc.com), and Arthur S. Cheng (right), manager — technology, iron production, SeverStal North America Inc., Dearborn, Mich. (acheng@severstalna.com)
Improved blast furnace designs, plus the adaptationof various campaign extension techniques, has raised campaign life expectancy to 10–15 years. This paper summarizes the North American approach to achieving campaign lives of 15–20 years. |
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58
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Pelletizing and Pellet Quality at Cleveland-Cliffs Operations
Erin E. Sgouris and Kenneth G. Oja, Cliffs Technology Group, Cleveland-Cliffs Inc., Ishpeming, Mich. (eesgouris@cleveland-cliffs.com, kgoja@cleveland-cliffs.com)
Pellet quality at Cleveland-Cliffs is reviewed with emphasis on sizing, compression and metallurgical properties. Efforts to continuously improve these properties will be discussed. |
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67
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Investigation of Influential Parameters on Blast Furnace Operations and Wear Conditions After Inner Volume Enlargement
Walter Hartig, general manager — blast furnace, and Rongshan Lin, manager of R&D — iron and cokemaking, AG der Dillinger Huettenwerke, Dillingen, Saar, Germany (walter.hartig@dillinger.biz, rongshan.lin@dillinger.biz)
This paper describes the operational performance and wear conditions of ROGESA’s No. 5 blast furnace after its enlargement, especially regarding the influenceof coke quality, hearth design, choice of refractory,the cooling system and the use of titanium-bearing materials. |
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78
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The Advantages and Disadvantages of Incorporating a Fourth Stove Within an Existing Blast Furnace Stove System
Cedric Colling (left), senior process engineer, Siemens VAI, Stockton-Upon-Tees, United Kingdom (cedric.colling@siemens.com), and Peter Martin (right), U.S. blast furnace principal business developer, Siemens Energy and Automation Inc., Metals Technology Division, Canonsburg, Pa. (peter.m.martin@siemens.com)
This paper describes the advantages of adding a fourth blast furnace stove to an existing three-stove system. The existing stoves can be sequentially rebuilt with no loss of production at the blast furnace, or from any of the downstream production processes. |
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| 87 |
Hi-QIP, a New Ironmaking Process
Akinori Murao (top left), Yoshitaka Sawa (top center), Hiroyuki Hiroha (top right), Takashi Matsui (bottom left), Natsuo Ishiwata (bottom second from left), Takahide Higuchi (bottom second from right) and Kanji Takeda (bottom right), Ironmaking and Environmental Process Research Dept., Steel Research Laboratory, JFE Steel Corp., Chiba, Japan (a-murao@jfe-steel.co.jp)
Hi-QIP is a new coal-based process to produce high-quality iron. The process enables the melting of reduced iron in the rotary hearth furnace, and permits fluctuation of mixing of raw material. Pilot plant tests and the results are discussed. |
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