Measurement of Meniscus Flow Velocity in High Speed Continuous Casting Mold

Abstract

A sensor for flow velocity measurement of molten steel was developed which measured the shedding frequency of Karman vortex streets behind a refractory cylinder, and then the absolute value of flow velocity below the meniscus in a high speed continuous casting mold was made clear. Experiment for calibration of this sensor was done using both molten steel and molten metal which having low melting point. It was found that the flow velocity was described as a function of both the shedding frequency of Karman vortex streets and the diameter of the refractory cylinder. On the basis of this relation, the measurement of the shedding frequency of Karman vortex streets could give the absolute value of flow velocity of molten steel below the meniscus in the mold. It was possible to determine optimum conditions of high speed continuous casting from the result of measured flow velocity in the mold using this sensor.