On the Interaction of Exogenous Nanoparticles of Refractory Phases with Tin and Antimony in Cobalt Melts

The results of the heterophase interaction of refractory-phase nanoparticles of Al2O3, ZrO2, and HfO2 with cobalt melts containing harmful impurities of nonferrous metals (tin and antimony) are investigated and summarized. It is shown that after the introduction of nanoparticles in the Co–Sn and Co–Sb systems, the degree of impurity removal, depending on the isothermal holding time, was 13–31 and 10–26 rel. %, respectively. It is found that the redistribution of impurities with nanoparticles in the melt in the form of ensembles and their removal to the phase boundary Me–gas/slag/ceramics can be represented as a two-stage process.