Table of Contents

    • 48

    • Introducing Power System Event Report Data Into Plant Historian Systems

      Process data historians serve a critical function in many operating environments by providing convenient access to detailed control systems and quality information for later analysis. This paper addresses a method to seamlessly integrate event reports into an existing or new process historian system. Additionally, the paper discusses potential benefits and user applications resulting from such system integration.

    • 57

    • CFD Investigation of the Effects of Iron Ore Reducibility and Coke Reactivity on Blast Furnace Operation

      In this paper, a computational fluid dynamics (CFD) model is employed to investigate changes in ore and coke reaction rates in the shaft region of a blast furnace. The CFD analysis shows that a specified combination of the reaction rates of ore and coke significantly affects the solution loss reaction of the coke in the shaft region. The effects of each individual reaction rate, as well as the combination of reaction rates, are studied.

    • 66

    • Continuous Slab Casting Superheat Control at SSAB Mobile

      A new vacuum tank degasser (VTD) was commissioned at the SSAB Mobile facility in 2012. A model was developed to predict ladle exit temperatures and track real-time steel temperature evolution in the VTD. The model has resulted in superheat compliance in more than 90% of the heats cast, enabling SSAB to increase its sequence length on critical products by 100%, and significantly improve caster yields.

    • 86

    • A Unifying Spatial Curvature Framework for Coordinated Pass Scheduling, Shape Targeting and Mill Setup

      Pass schedules, shape targets and a mill’s setup are inherently coupled. Traditional design strategies partition the problem and treat these components independently, leading to undesirable interactions with no design guidance for resolving the induced difficulties. This article examines a new method that combines and coordinates these components within a unifying spatial curvature framework that abstracts from the mill type and longitudinal/transverse geometry, and provides specific design guidance.

      This article is the fourth in a series by Mark E. Zipf. The first part was published in the December 2012 issue, the second in the February 2013 issue and the third in the February 2014 issue of Iron & Steel Technology