Table of Contents

    • 45

    • Mold Heat Transfer Behavior at High Casting Speed Over 7.0 m/minute in the CEM®, POSCO

      In order to develop a new process of thin-slab endless rolling for thin-gauge production, POSCO accomplished a casting speed of 8.0 m/minute with 80 mm slab thickness, and produces ultrathin-gauge hot coils smoothly by endless rolling based on high-throughput continuous casting. This paper discusses heat flux behavior in order to understand how the high-speed casting is successful with low mold flux consumption.

    • 58

    • Novel Refractory Plate Sealing Technology

      A coating material for sealing the joint between moving, adjoining refractory surfaces at high temperature has been developed. The coating utilizes a specially coated expandable graphite with a high intumescence onset temperature. The results from different steel plant trials with monoblock tundish nozzle plate and monoblock tundish shroud plate have shown clear benefits to this patented technology. This paper describes the key aspects of the technology, the advantages it offers and some recent field results from steel plants.

    • 67

    • CFD Modeling To Simulate Gas Stirring Process Using Bottom Plugs in a Steel Ladle

      One of the aspects of steel conditioning in a ladle is the proper mixing and stirring of steel, typically through gas injection. Computational fluid dynamic modeling of flow dynamics in a gas-stirred steel ladle was performed to evaluate plug placement locations for one of United States Steel Corporation’s steel ladle designs. A three-dimensional, multi-phase flow model was used to simulate the movement of steel and slag with the bottom injection of argon gas.

    • 74

    • Understanding the Clogging Phenomenon During High-Al TRIP Steel Casting

      ArcelorMittal USA produces high-Al transformation-induced plasticity grades to meet the needs for stronger and lighter material for the automotive industry. During continuous casting of high-Al steels with Al higher than 0.9%, nozzle clogging was occasionally observed. Computational fluid dynamics simulations were performed to understand the formation location, shape and size of the clogging mass. This paper summarizes the findings.

    • 94

    • Solution for Continuous Caster DC Motor/Encoder Failures

      EVRAZ Rocky Mountain Steel upgraded its caster withdrawal/straightener control system, including the replacement of the old DC motors and drives. A solution proposed by AMI GE included new standard AC motors with resistance temperature detector probes for temperature monitoring and redundant encoders inside a water-cooled enclosure and new drives. This paper details the problem, its implementation and results.