Table of Contents

    • 38

    • voestalpine Texas — A New Market for Hot Briquetted Iron

      Hot briquetted iron (HBI) is the compacted, denser form of direct reduced iron (DRI). Manufactured for easier handling and trans-ocean shipping, the majority of this product has been melted in electric arc furnaces (EAFs). This paper discusses voestalpine Texas, which is the first HBI plant designed specifically to supply blast furnaces.

    • 44

    • Blast Furnace Above-Burden Infrared Camera

      A newly developed on-line Above-Burden Infrared Camera can monitor all the activities and events above the burden in blast furnaces. Through it, three important phenomena were discovered; actual burden distributions can be observed and optimized, and the operators will gain advance warning of adverse conditions occurring in their furnaces.

    • 64

    • High-Carbon DRI and Its Use and Advantages in EAF Operations

      Optimum carbon content in direct reduced iron (DRI) has always been a topic for debate. The form in which carbon is present in the DRI, free or as iron carbide, is reflected in different characteristics and benefits related to stability and energy release. Benefits of high-carbon DRI for EAF-based steel production, as compared with conventional lower-carbon DRI, are presented in this analysis.

    • 72

    • Advanced Technology Developments for Improving Blast Furnace Stave Life

      This paper presents a comparison of the thermal performance of cigar coolers against newly developed finger cooler technology. The comparison includes experimental test work and conjugate heat transfer analysis carried out using computational fluid dynamics simulations. The comparison shows that under typical furnace excursion conditions, a stave fitted with finger coolers will limit temperature increase to less than half that of a stave fitted with a cigar cooler.

    • 78

    • Numerical Simulation of a Walking Beam Slab Reheating Furnace

      Comprehensive numerical modeling and validation were conducted on an industrial walking beam slab reheating furnace. A three-dimensional computational fluid dynamics (CFD) model was developed to simulate the flow characteristics, combustion process and multi-scale heat transfer inside the reheating furnace. The operation process was modeled with specific slab walking speed and fuel variations. The model was validated with instrumented slab trials conducted at SSAB Mobile.