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2009 November Issue
Vol. 6, No. 11 - Full Table of Contents
Oxygen Steelmaking Technologies
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About the Cover
Hot metal charging to one of three LD converters. This process step is followed by blowing with oxygen in order to transform hot metal and added scrap into steel. Siemens VAI commissioned the converter meltshop of a Chinese steel producer, with the target of the project to establish production of approximately 4.1 million tons of steel per year with three 180-ton LD/BOF converters.
Photograph courtesy of Siemens VAI.
Full magazine available in the Members Only Area |
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Technical Features Table of Contents |
| 31 |
Nucor Memphis SBQ Steel Mill
Theodore J. Leczo, steel industry consultant (tjleczo@hotmail.com)Nucor Steel’s Memphis, Tenn., steel plant features world-class steel manufacturing equipment operated by a carefully selected, mostly homegrown workforce, overseen by competent, forward-thinking managers, to produce a broad selection of high-quality special bar quality steel products |
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| 43 |
Hydrogen and Nitrogen Control in Steelmaking at
U. S. Steel
Siddhartha Misra (left), senior research engineer, and Yun Li (center), research consultant — steelmaking and casting, United States Steel Corporation Research and Technology Center, Munhall, Pa. (smisra@uss.com, yli@uss.com); and Il Sohn (right), formerly of United States Steel Corporation Research and Technology Center (ilsohn@yahoo.com)
Hydrogen and nitrogen are two gases that, when dissolved in liquid steel, affect its properties significantly. Accurate measurement of these gases is the first step in controlling the properties of steel and preventing hydrogen-induced sticker breakouts at the continuous caster. |
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54 |
Further Process Improvements at Severstal Sparrows Point
via New Technology Implementation — Moving the Bottlenecks
Randall P. Stone (left), senior product manager, and David Patterson (right), sales service engineer, Heraeus Electro-Nite Co. LLC, Langhorne, Pa. (randy.stone@heraeus.com, dave.patterson@heraeus.com); Danny Neith, process manager — steelmaking, and Scott Koester, process control engineer — steelmaking, Severstal Sparrows Point, Sparrows Point, Md.; and Robert V. Branion Jr., principal consultant, Branion Associates Inc., Valparaiso, Ind. (r.remus6@comcast.net)
This paper details the implementation of a hot metal silicon probe, temperature/oxygen
drop-in sensors and tapping cameras to reduce slag carryover. The implementation, integration
and synergy of these technologies and the effect on key operational parameters are described. |
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Innovative Offgas Cleaning and Recovery Solutions for Steelmaking
Karl Jamek, product and project manager — environmental technologies for steelmaking, Siemens Industry Inc., Linz, Austria (karl.jamek@siemens.com)
This paper describes the latest developments in waste gas treatment and energy and gas recovery. In the field of secondary dedusting systems, Siemens Industry Inc. applies advanced pulse-jet filter technology and has made a cost-saving innovation with the development of static coolers. |
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| 70 |
Low-Temperature Oxidation on Magnesia Carbon Brick
Yong M. Lee, senior research engineer, ArcelorMittal Steel Global Research and Development, East Chicago, Ind. (yong.lee@arcelormittal.com)
Antioxidant metals have been used to protect the carbon bond in magnesia carbon bricks from oxidation. However, antioxidant metals cannot protect the carbon bond if they do not melt at low temperature. Low-temperature oxidation behavior on magnesia carbon was investigated and is presented. |
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| 75 |
An Investigation of Hot Metal Desulfurization by Mg
Qizheng Liu (top left), Mechanical, Materials and Aerospace Dept., Illinois Institute of Technology, Chicago, Ill. (liuqizh@iit.edu); Howard Pielet (top right), Pallava Kaushik (bottom left) and Bernard Chukwulebe (bottom right), manager — steelmaking and refractories, ArcelorMittal Global Research & Development, East Chicago Center, East Chicago, Ind. (howie.pielet@arcelormittal.com, pallava.kaushik@arcelormittal.com, bernard.chukwulebe@arcelormittal.com)
Techniques such as energy dispersive spectrometer, cathodoluminescence microscope and automated scanning electronic microscope were used to understand the mechanism of hot metal desulfurization. A sample that had higher sulfur content is explained based on experimental results. |
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| 82 |
Inclusion Characterization: A Tool for Measurement of Steel Cleanliness and Process Control
Pallava Kaushik (left), senior research engineer, Howie Pielet (center) and Hongbin Yin (right), Steelmaking Process Research, ArcelorMittal Global Research and Development, East Chicago, Ind. (pallava.kaushik@arcelormittal.com, howie.pielet@arcelormittal.com, hongbin.yin@arcelormittal.com)
This article summarizes research into inclusion characterization techniques used routinely to support the process improvement needs of internal customers of ArcelorMittal Global R&D. Examples are presented showing useful applications of each technique to study steelmaking and casting practices that affect steel quality. |
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Maintenance & Reliability
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