Table of Contents

    • 59

    • Technology-Based Crane Monitoring and Diagnostics

      This paper will demonstrate how technology-based predictive maintenance programs can be used to maintain a crane in such a way as to avoid unforeseen downtime, extend mean time between failures on critical components, and to provide needed information for troubleshooting purposes when the need arises. Various examples of confirmed benefits will be highlighted during the presentation, with future expectations.


    • 70

    • Benefits of the Implementation of a State-of-the-Art Slab Management System

      This paper discusses an integrated slab tracking system that was implemented in the slab yards of a hot rolling mill facility. The system automatically tracks all slabs from entry to exit, thus reducing safety risks, increasing throughput of the yard, reducing slab preparation times for the mill and ensuring the right slab order at the mill entrance. The system tracks each individual slab automatically without the need of any operator intervention.


    • 77

    • Motion Analysis for Determining Behavior of Automated and Manually Operated Cranes

      Repeated positioning of a bridge crane with a high degree of accuracy and with minimal stress on crane components such as gearboxes, drives, motors,  wheels and rails is both a goal and a challenge for any operator or fully automated crane. The motion analysis kit can identify positioning disturbances, drive and motor issues, component wear, and more.


    • 84

    • Bearing Failures in Steel Mill Applications

      Bearing failures can cause significant costs due to equipment downtime, lost production and manpower costs.  This paper presents failures of bearings found in steel mill applications and discusses potential countermeasures to prevent recurrence.


    • 91

    • Optimizing Your Mechanical Draft Fans for Energy Efficiency

      Fan or draft system modifications can range from correcting inlet or outlet conditions on the fan to a complete rotor redesign and replacement or possibly a complete fan replacement on an existing foundation. This paper presents a case history detailing the step-by-step process for upgrading a set of fans that saved in excess of 25,000,000 kWh per year, equating to savings of over US$2 million per year.


    • 100

    • Resolving Complex Shape Distortions on Narrow, Thin Gauge Strip Having an Asymmetric Transverse Thickness Profile — Case Study: Part 2 — Resolving the Problem

      Resolving localized shape distortions in narrow, asymmetric profiled strip is a difficult, multi-faceted problem. There are many potentially coupled and interacting sources, and no easy way to find the culprit. A recently developed analytic method offers a means of decoupling and isolating the individual components, providing insight into the fundamental problem and avenues of correction. This article is the second in a two-part case study and provides an illustration of how the analytic method can be applied.

      This article is the sixth in a series by Mark E. Zipf. The preceding parts were published in sequence in the December 2012, February 2013, February 2014, December 2014 and May 2016 issues of Iron & Steel Technology. 


    • 113

    • ArcelorMittal Burns Harbor Steel Producing Integrated Computers in Cab-Operated DC Cranes for Data Collection and Improved Communication

      Inverters and touch-screen computers have been installed in cab-operated cranes at ArcelorMittal Burns Harbor steel producing during the past four years. The computers are linked wirelessly to networked programmable logic controllers and display critical data related to hoist weights, positions and an accurate production schedule to the crane operator. Computers also allow operators to enter pre-shift inspections via a virtual keyboard. Inspections are then distributed electronically to management personnel so that problems identified can be resolved.