Phase Equilibrium and Minor Elements Distribution between SiO<SUB>2</SUB>–CaO–FeO<I><SUB>x</SUB></I>–MgO Slag and Copper Matte at 1573 K under High Partial Pressures of SO<SUB>2</SUB>

• Roghani Ghasem

  Institute for Advanced Materials Processing, Tohoku University

• Hino Mitsuhisa

  Institute for Advanced Materials Processing, Tohoku University

• Itagaki Kimio

  Institute for Advanced Materials Processing, Tohoku University

Bibliographic Information

Other Title

• Phase Equilibrium and Minor Elements Distribution between SiO2-CaO-FeOx-MgO Slag and Copper Matte at 1573K under High Partial Pressures of SO2
• Phase Equilibrium and Minor Elements Di
• Phase Equilibrium and Minor Elements Distribution between SiO<SUB>2</SUB>&ndash;CaO&ndash;FeO<I><SUB>x</SUB></I>&ndash;MgO Slag and Copper Matte at 1573 K under High Partial Pressures of SO<SUB>2</SUB>

Abstract

Phase equilibrium between copper matte and SiO₂–CaO–FeO_x–MgO slag with Q=0.35 (Q=mass%CaO/(mass%CaO+mass%SiO₂)) was investigated at 1573 K under the SO₂ partial pressures of 10.1, 50.7 and 101.3 kPa as a fundamental study for thermodynamically discussing oxygen-smelting processes to produce copper. The copper and sulfur solubilities in the slag were found to be independent of p_SO<SUB>2</SUB> when the matte grade was specified, and it was considered that this behavior was ascribed to the constancy of (p_O<SUB>2</SUB>⁄p_S<SUB>2</SUB>) against p_SO<SUB>2</SUB> at a given matte grade. When the distribution ratio of a minor element, X, between the slag and matte phases was defined as L_x^s/m=(mass%X in slag)/{mass%X in matte}, L_x^s/m for As, Sb and Bi at a given matte grade increased with increasing p_SO<SUB>2</SUB>. This behavior was explained reasonably by assuming a mutual reaction between a metallic species in the matte and an oxidic species in the slag. The distribution ratio, L_Ag^s/m, at a given matte grade was almost constant against p_SO<SUB>2</SUB>. This was considered to be ascribed to the sulfidic species of AgS_0.5 prevailing in the matte phase and the constancy of (p_O<SUB>2</SUB>⁄p_S<SUB>2</SUB>) against p_SO<SUB>2</SUB>.

Journal

• Materials Transactions, JIM

  Materials Transactions, JIM 38 (8), 707-713, 1997

  The Japan Institute of Metals

Keywords

• copper smelting
• oxygen blowing
• copper matte
• SiO<SUB>2</SUB>–CaO–FeO<SUB>x</SUB>–MgO slag
• phase equilibrium
• solubility
• distribution ratio

Details

• CRID: 1390282679225199360
• NII Article ID: 130003556961
• NII Article ID: 10002453435
• NII Book ID: AA10699969
• DOI: 10.2320/matertrans1989.38.707
• COI: 1:CAS:528:DyaK2sXmsFegsrY%3D
• ISSN: 2432471X
• ISSN: 09161821
• NDL BIB ID: 4295846
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4295846
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1989/38/8/38_8_707/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed