Continuous Measurements of Bubble Characteristics in a Molten Iron Bath with Ar Gas Injection.

Abstract

Present authours developed a new electro-resistivity probe being able to continuously measure bubble characteristics in a mo]ten iron bath agitated by gas injection. The life of the probe was about two hours at a bath temperature of 1 250'C. The axial and radial distributions of gas holdup oe, bubble frequency fB, mean bubble rising velocity aB and mean bubble diameter dB were determined for the Ar gas flow rates of 50 and 100cm3/s (at 1 250'C). The Ar gas was preheated up to 1 250'C and then injected through a single-hole centric bottom nozzle.