Table of Contents

    • 71

    • Optimizing Fe Yield in an All-DRI-Fed EAF

      Optimizing costs in the EAF generally involves a tradeoff among productivity, electrical consumption and iron yield as major factors. Recent efforts to increase iron yield at ArcelorMittal Mexico have focused on the loss of iron units, warranting closer attention to the DRI feed size distribution and better control of the DRI %C.

    • 82

    • Step Milling as a Tool for Characterizing Defects in Slabs at ArcelorMittal

      ArcelorMittal Indiana Harbor, in conjunction with ArcelorMittal Global Research and Development, has developed testing and analytical methods to visualize macro-distribution of non-metallic particles and voids within near-surface layers of slabs. This paper details the method and variety of applications to which slab step milling has been applied. 

    • 93

    • FeSi Residuals and Their Effects on Steel Cleanliness

      Ferrosilicon has been added to heats at the ladle metallurgy furnace (LMF) for many years. However, the residual elements found in FeSi play an important role in the cleanliness of the heat. Through trialing different addition times during the LMF process, it was concluded that the effect of the alloy addition timing on the cleanliness of the heat related to the residual calcium is significant.

    • 111

    • The Peritectic Phase Transition of Steel During the Initial Stages of Solidification in the Mold

      In order to better understand and explain industrial observations with respect to uneven solidification in steels of peritectic composition, a concentric solidification technique was employed using a high-temperature laser-scanning confocal microscope to observe solidification and subsequent phase transformation in-situ. By integrating the results with in-plant observations, new insights of practical significance have been obtained.