Interaction of Exogenous Nanoparticles Al2O3 and MgAl2O4 with Copper, Dissolved in Iron Melts

Abstract

The processes of interaction of exogenous nanoparticles Al 2 O 3 and MgAl 2 O 4 with iron melts containing surfactant-copper have been studied. Thermodynamic calculations confirmed the choice of these nanoparticles. The dependence of the degree of copper removal during heterophase interaction on size factors was studied: the time of isothermal holding after nanoparticle introduction, the type of nanoparticles, and the concentration of copper in the metal. It was shown that the introduction of Al 2 O 3 nanoparticles led to a decrease in the copper content from 9 to 20 rel. %, and MgAl 2 O 4 - from 10 to 24 rel. %. After the introduction of Al 2 O 3 into stainless steel, the degree of copper removal was from 6 to 23 rel. %, depending on the holding time of nanoparticles in the melt and their concentration.