Table of Contents

    • 63

    • Rolling Mill Bearing Failures and Their Causes

      Premature bearing failures in a rolling mill are costly in terms of downtime, replacement of bearings and possible machining required to the chocks. Often, the cause of a bearing failure in a rolling mill is incorrectly diagnosed as inadequate lubrication. Performing a correct root-cause analysis to determine the initial cause of the failure is crucial to correction of the problem. This paper will explore causes of rolling mill bearing failures and measures to improve bearing service life.


    • 72

    • Attaining Environmental Compliance While Increasing Productivity at BSW’s Meltshop

      A conceptual engineering study and model study of BSW’s meltshop were conducted to assess how large the meltshop emission control system should be, as well as to determine how to fit an additional filtration area in the limited space available.

      This paper describes the complete project cycle starting from the fluid dynamic model study and concept development phase to its efficient implementation in 2014 and presents the results after one year of operation.


    • 80

    • Improved Reliability and Cost Avoidance at ArcelorMittal Through Root-Cause Failure Analysis

      This paper discusses a proactive approach to a reactive methodology by applying reliability-centered maintenance (RCM) to identify the root cause and other potential failure modes for a functional failure. A single, consistent process was used to determine appropriate failure management policies based on technically sound and “worth doing” criteria defined by RCM. Examples resulting in more than US$4.75M per year of cost avoidance/savings are presented.


    • 88

    • Life Diagnosis for Large Industrial Motors

      This paper introduces a noninvasive looseness estimation using Cepstrum analysis of audio signals. The proposed method is effective in detecting loose coils and synchronous motor damping bars.


    • 98

    • Reliability of Electrical Systems: From Testing to Monitoring

      Specific data from a fault gas monitor study will be presented, as well as a test case that focuses on the relationship between risk and reliability. In the past, chemical, mechanical and electrical testing were relied on to determine the detectability of failure. With the great increase in the use of on-line fault gas monitors, determining more timely potential faults means potential failures can be anticipated, thereby reducing the high consequential costs of those failures.