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December
Vol. 5, No. 12
Maintenance & Reliability Technologies
About the Cover
Konecranes service technician, Stan Dixon, conducts a MAINMAN® crane inspection of the overhead equipment at Middletown Tube Works, Middletown, Ohio. A detailed report of inspection results confirms that equipment is operating efficiently or alerts customers of maintenance problems and identifies areas that are not in compliance with regulatory standards. Photograph courtesy of Konecranes.
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Installation of SIEFLEX® Oil-Lubricated Tube Spindles at North Star BlueScope Steel
Keith Hoffman, maintenance manager, North Star BlueScope Steel, Delta, Ohio (keith.hoffman@northstarbluescope.com); Christoph Sundermann (left), general manager — drives/drive component design, and Steffen Knoblauch (center), manager — drives/drive components design, SMS Demag AG, Hilchenbach, Germany (christoph.sundermann@sms-demag.com, steffen.knoblauch@sms-demag.com); and William Malan (right), general manager — drives/drive components sales and services, North American market, SMS Demag LLC, Park City, Utah (bill.malan@sms-demag.us)
North Star BlueScope replaced its original grease-lubricated spindles with modern oil-lubricated tube-type spindles to eliminate a recurring source of maintenance costs and associated downtime. This paper details the conversion and a cost-benefit analysis. |
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AC Replacement for DC Mill-Duty Motors
Ronald Tessendorf (top left), TM GE Automation Systems LLC (TMGE), Salem, Va. (ronald.tessendorf@temic-ge.com); Sumiyasu Kodama (top right), Toshiba Mitsubishi Electric Industrial Systems Corp. (TMEIC), Metals Industry Systems Engineering Dept., Tokyo, Japan (kodama.sumiyasu@tmeic.co.jp); Ryoji Nagatini (bottom left), Toshiba Mitsubishi Electric Industrial Systems Corp. (TMEIC), Togitsu Medium-Size Rotating Machinery Dept., Nagasaki, Japan (nagatini.ryoji@tmeic.co.jp); Shinji Negi (bottom right), Mitsubishi Electric Engineering Co. Ltd., Steel Plant Engineering Section, Tokyo, Japan (negi.shinji@tmeic.co.jp); and Tatsuya Marumoto, Mitsubishi Electric Engineering Co. Ltd., Engineering Department-3 Medium Rotating Machinery, Nagasaki, Japan (marumoto.tatsuya@tmeic.co.jp)
For many years, DC mill auxiliary motors for steel mill applications were specified as Type MD. Many of these motors have been replaced with less-rugged DC or AC motors. This paper reviews the features of direct-replacement AC mill auxiliary motors. |
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Optimizing a Predictive Maintenance Program Using New Technology
Heather De Jesús and Don Rainey, Azima DLI, Woburn, Mass. (hdejesus@azimainc.com, drainey@azimainc.com)
Modern technology allows more effective monitoring of mill machinery at lower cost than traditional once-a-month and manual monitoring approaches. Case studies include roll mill drives, mill cooling pumps, fans and pumps with environmental control impact. |
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Repair of Essar Steel Algoma’s BOF Lamella Suspension
Steven E. Dew (left), mechanical engineer, Stephen Briglio (right), senior process analyst, and Stephen Ritza, mfg. tech. engineer, Essar Steel Algoma Inc. (steven.dew@algoma.com, stephen.briglio@algoma.com, stephen.ritza@algoma.com)
A lamella break at Essar Steel Algoma was followed by untimely shell breakouts in two vessels. This paper describes the analysis and recovery plans used to span the time before a scheduled outage, and the staging to replace the lamellas. |
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MRO Critical Spares Management — Maximizing Steel Mill Uptime Performance
Peter M. Lewis, director of operations, Fluor Corp., Greenville, S.C. (peter.lewis@fluor.com)
Critical spares management is a significant component to increasing uptime and controlling costs in a steel mill. This paper reveals requirements for having the right part available at the right time, in the right condition and at the lowest cost. |
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Shape — Certifying the Equipment Not the Product
Kent Douglas Harvey, United States Steel Corporation, Gary, Ind. (kdharvey@uss.com)
Certifying the equipment instead of the product can increase product reliability. This paper explains the benefits of correlating data, finding the “sweet spot” for technical parameters, receiving consistent mill alignments, and supplying operating crews with the proper tools. |
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