The stirring power required achieving uniform composition and temperature in ladle metallurgy is a function of the volumetric gas flow rate, metal depth, and slag thickness. Accurate estimation of the stirring power requires the precise determination of the amount of metal and slag depth. The present study found that frequencies of the acoustic signal generated during the stirring process can indicate the depths of metal depth as well as slag thickness. This is promising as it offers a potentially simple technique for simultaneously detecting slag thickness and stirring in ladles.
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