Water Model Experiment on Bubble Flotation of Inclusions in Molten Copper

Abstract

Water model experiments for bubble flotation have been performed on polyethylene particle removal under N₂ gas injection stirring condition. The effect of gas flow rate, particle diameter and liquid height on removal rate has been investigated. It was found that the removal rate constant increases with increasing gas flow rate, particle diameter and decreasing with liquid height. The removal rate constant showed almost zero apparently in the case without oil layer because re–entrapping to the bulk liquid. A mathematical model based on bubble flotation theory was developed to represent the experimental data. The model calculated values were generally in agreement with the experimental values and were found to be valid.