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2012 January Issue
Full Table of Contents
Electric Steelmaking |
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About the Cover
The 174-tph Danieli FastArc™ AC EAF at OMK Vyksa, Russia. The 1.2-mtpy Quality Strip Production (QSP) line was the first thin-slab casting and rolling plant in the world specifically conceived for the production of top-quality pipe grades, such as API X70 and X80, even for arctic applications.
Photo courtesy of Danieli.
Full magazine available in the Members Only Area - NEW UPGRADED FORMAT! |
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Technical Features Table of Contents
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| 38 |
STATCOM for Maintaining Power Quality in a Grid Feeding a Steel Plant
Rolf Grünbaum, senior marketing manager FACTS, ABB AB, Vasteras, Sweden, rolf.grunbaum@se.abb.com; Jean-Philippe Hasler, R&D engineer FACTS, ABB AB, Vasteras, Sweden, jean-philippe.hasler@se.abb.com; Andrew Owens, sales engineer FACTS, ABB, Raleigh, N.C., USA; andrew.j.owens@us.abb.com; Jon Rasmussen, lead engineer FACTS, ABB, Montréal, Que., Canada, jon.a.rasmussen@ca.abb.com
This paper addresses a STATCOM device based on voltage source converter design enabling direct (transformerless) connection and a wide dynamic range, utilizing an insulated gate bipolar transistor as the switching element and a control scheme based on pulse-width modulation. |
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| 47 |
Clean Steel Technologies for the Production of 316L Stainless Steel Ultrafine Wires
Kent D. Peaslee, F. Kenneth Iverson Steelmaking Chair and Curators Teaching Professor of Metallurgy, Missouri University of Science & Technology, Rolla, Mo., USA, kpeaslee@mst.edu;
Shufeng Yang, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, China. shufengyang69@163.com; Jingshe Li, professor, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, China lijingshe@ustb.edu.cn; Lifeng Zhang, professor, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, China, zhanglife@mst.edu; Gang Li, engineer, Shougang Gitane New Materials Co. Ltd., Beijing, China
Breakage of wire often occurs during the drawing process, due to the existence of inclusions in the steel. In order to improve the cleanliness of 316L steel, the deoxidizer and top slag composition were optimized by thermodynamic calculations and industrial trials. |
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56 |
Analysis of Meltshop Operating Data at North Star BlueScope Steel to Quantify the Expected Benefits of Increased Furnace Bottom Volume on EAF Operations
Jeremy A. Jones, vice president — corporate development, Transfield Services Americas, Houston, Texas, USA, jonesjer@transfieldservices.com;
Rex McClanahan,
North Star BlueScope Steel, Delta, Ohio, USA,
rex.mcclanahan@northstarbluescope.com;
Kent Carraway,
Superior Machine Co., Florence, S.C., USA,
kent@smco.net
This paper presents an analysis
of the projected benefits of
increasing the volume of the
furnace bottom. The work was
completed in 2010, and the actual
achieved benefits are shown
for comparison with the original
projections. |
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61 |
Decarburization Efficiency in EAF With Hot Metal Charge
Riccardo Gottardi, managing director, business unit steelmaking, SMS Concast AG, Zurich, Switzerland, info@sms-concast.ch; Stefano Miani, technical director, SMS Concast Italia SpA,
Udine, Italy; Adam Partyka, senior process metallurgist, SMS Concast Italia SpA, Udine, Italy;
Maurizio Suber, commissioning engineer, business unit steelmaking, SMS Concast Italia SpA, Udine, Italy, info@concast.it
This paper presents furnace configuration, hot metal charging techniques and oxygen injection practices. Performance results related to various charge mixes are discussed. |
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70 |
The Evolution of Preheating and the Importance of Hot Heel in Supersized Consteel® Systems
Francesco Memoli, vice president steelmaking, Tenova Core, Coraopolis, Pa., USA,
fmemoli@tenovacore.com; Marta Guzzon, process engineer, Tenova Meltshops – Iron and Steel Division, Milan, Italy, marta.guzzon@it.tenovagroup.com; Cesare Giavani, process development manager, Tenova Meltshops – Iron and Steel Division, Milan, Italy, cesare.giavani@it.tenovagroup.com
In recent years, the development of Consteel® technology has focused on the preheating function, in order to accomplish the energy savings and environmental requirements of Western countries. This paper describes why the hot heel is a fundamental pillar of the Consteel process, providing process details and technological peculiarities. |
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158 |
A Metallurgical Perspective of the Rold of Rail Steel in the Growth of America
2011 AIST Adolf Martens Memorial Steel Lecture
B.L., Bramfitt
Railroads are in part responsible
for the rapid expansion of industrial
growth in North America in the
latter part of the 19th century
and the beginning of the 20th
century. Steel rails were the basic
ingredient that made this growth
possible. The first commercial
steel rails in America were made in
1867 by the Bessemer steelmaking
process. Over the century and
a half since then, steelmaking
and processing methods have
improved with an evolution in rail
composition and microstructure
that has led to safe, high-strength,
wear-resistant rails for heavy-haul
freight and passenger rail service.
Adolf Martens played a role in this
evolution. The key to producing a
high-hardness, wear-resistant rail is
through a eutectoid microstructure
with as fine an interlamellar spacing
as possible. Metallurgists have
utilized fundamental principles of
physical metallurgy to fine-tune the
composition, processing routes and
microstructure of today's steel rail. |
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220 |
High-Efficiency Dephosphorization Technique With FeO Dynamic Control in Top- and Bottom-Blowing Converter
Yasushi Ogasawara, researcher, steelmaking research department, steel research laboratory, JFE Steel Corp., Hiroshima, Japan, ya-ogasawara@jfe-steel.co.jp; Naoki Kikuchi, manager, steelmaking research department, steel research laboratory, JFE Steel Corp., Hiroshima, Japan; Akitoshi Matsui,
deputy manager, steelmaking research department, steel research laboratory, JFE Steel Corp., Hiroshima, Japan; Yasuo Kishimoto,
general manager, research planning and administration department, steel research laboratory, JFE Steel Corp., Chiba, Japan
A new (FeO) controlling system during blowing in a top- and bottom-blowing converter has been developed in order to enhance dephosphorization. The (%FeO) could be calculated by oxygen balance and slag volume at intervals of 10 seconds, and monitored on an operating screen. |
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