Research on the Interaction Mechanism between Magnesium Refining Flux and Solid Inclusions

Abstract:

Aiming at the current lack of clarity regarding the interaction mechanism between magnesium refining fluxes and solid inclusions, this study conducted multi-scale characterization on magnesium refining flux, MgO powder, their mixtures, and the furnace bottom slag generated during the refining process. Techniques including DSC/TG thermal analysis, XRF, XRD, SEM, and TEM were employed. The results indicate that, under the conditions of this study: 1) The bonding mechanism between the magnesium refining flux and solid inclusions (such as MgO) is physical bonding rather than chemical bonding; 2) A significant "core-shell encapsulation" characteristic is observed, where the solid inclusion acts as the core and is encapsulated by the flux shell.