Floating behaviour of molten copper and Cu-matte in Cu-slag - study on interfacial phenomena in phase separation of copper smelting (2nd report)

Takashi Nakamura, Fumio Noguchi, Yasuaki Ueda, Satoshi Nakajyo

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Interfacial tension in molten copper-fayalite slag and Cu matte-fayalite slag systems has been measured by the sessile drop method combined with X-ray radiophotography. Interfacial tension between copper and fayalite slag was in the range 0.8-0.6 N/m-1 at 1473 K and decreased with the increase of oxygen partial pressure at the interface. While interfacial tension between Cu matte and the slag was small at low mass%Cu in Cu matte it increased 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. Matte particles may be floated with gas bubbles in the slag.

Original languageEnglish
Pages (from-to)531-536
Number of pages6
JournalNihon Kogyokaishi
Volume104
Issue number1206
DOIs
Publication statusPublished - 1988

ASJC Scopus subject areas

  • Engineering(all)

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