銅スラグ中における溶銅, 溶融マットの浮遊挙動

銅溶錬工程の相分離に関する界面現象的研究 (第2報)

抄録

Interfacial tensions in molten copper-fayalite slag and Cu-matte-fayalite slag systems have been measured by sessile drop methodcombined with X-ray radiophotograph. Interfacial tensions between copper and fayalite slag were found in the range of 0.8-0.6 N/m^-1at 1473 K and decreased with the increase of oxygen partial pressure at the interface. Oxygen played a role of an interfacial active element in the system. While interfacial tensions between Cu-matte and the slag were rather small at low mass% Cu in Cu-matte, they became large when mass% Cu in the matte increased.
Spreading and floating coefficients in the copper-fayalite slag system were negative. On the other hand, negative spreading coefficients and positive floating coefficients were obtained in the Cu-matte -slag system. It has been understood thatmatte particles may be floated with gas bubbles in the slag. Floatation behaviour of matte particles with gas bubbles in the fayalite slag was able to be directly observed at 1473 K in the fayalite slag by X-ray radiophotograph technique.