METALLIC PHASE FORMING IN BARBOTAGE OF MULTICOMPONENT OXIDE MELT BY REDUCTION GAS. REPORT 2. DENSITY AND SURFACE PROPERTIES

Abstract

Density and surface tension of ferronickel and oxidized Nickel ore melts are measured. Interfacial tension at this phases border at the 0 – 100 mas. % of nickel content in the metal phase and temperature range 1550 – 1750 °С is measured as well. Experimental results are generalized in the form of functional dependencies relating density, surface and interfacial tension with temperature and composition. The obtained data may be used for metallic phase formation processes analysis at the barbotage treatment of oxidized Nickel ore by carbon monoxide. Density and surface tension of the molten ferronickel (0 – 100 % Ni), and oxidized nickel ore melts (mas. %: 14.8 Fetotal , 7.1 FeO, 13.2 Fe2 O3 , 1.4 CaO, 16.2 MgO, 54.5 SiO2 , 4.8 Al2 O3 , 1.5 NiO, 1.2 Cr2 O3 ) are measured by the of sessile drop method as well as the interfacial tension at the interface boundary in the 1550 – 1750 °C temperature interval. This alloys density varies from 7700 to 6900 kg/m3 , oxide melt density – from 2250 to 1750 kg/m2 , surface tension – from 310 to 290 mJ/m2 . Obtained results agree well with the literature data. Functional temperature and concentration dependencies of density, surface and interfacial tension of the melts are presented. Temperature and concentration dependencies of the alloys meet fi rst order equations. Similar form has temperature dependence of surface and interfacial tension, while concentration dependence on nickel corresponds to the second order equation. The density and surface tension of the oxide melt meet linearly temperature dependence. The obtained results are supposed to use for description of metal phase formation in barbotage process of oxide melt by carbon monoxide.