Copper enrichment of iron-base alloy scraps by phase separation in liquid Fe-Cu-P and Fe-Cu-P-C systems

Katsunori Yamaguchi, Takuya Ohara, Shigeru Ueda, Yoichi Takeda

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A clear phase separation into liquid iron-rich and copper-rich alloys was observed when a mixture of Fe, Cu and P was melted in an alumina or carbon crucible at 1373 K. Since this phase separation is considered to be useful for recovering valuable copper from iron-base alloy scraps, the phase equilibrium in the Fe-Cu-P and Fe-Cu-P-C systems was investigated in this study. The effect of carbon to the phase separation was determined in the concentration range of phosphorous between 7 and 11 mass% at 1373 K. It was found that the addition of carbon enlarged the miscibility gap of the Fe-Cu-P system. Distribution ratios of some minor elements of Au, Ag, Pd, Pt, Rh, Cr, Mn and Ni between the liquid iron-rich and copper rich phases were also measured at 1373 K. It was found that Au, Ag and Pd were enriched in the copper-rich phase, while Pt and Mn were distributed in both phases, and Rh, Cr and Ni preferentially in the iron-rich phase.

Original languageEnglish
Pages (from-to)1864-1868
Number of pages5
JournalMaterials Transactions
Volume47
Issue number7
DOIs
Publication statusPublished - 2006 Jul
Externally publishedYes

Fingerprint

scrap
Phase separation
Copper
Iron
iron
copper
Carbon
Liquids
liquids
carbon
miscibility gap
copper alloys
Aluminum Oxide
Crucibles
crucibles
Phase equilibria
Alumina
aluminum oxides
Solubility

Keywords

  • Copper recovery
  • Distribution ratio
  • Iron scrap
  • Iron-copper-phosphorus
  • Iron-copper-phosphorus-carbon
  • Precious metal

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Cite this

Copper enrichment of iron-base alloy scraps by phase separation in liquid Fe-Cu-P and Fe-Cu-P-C systems. / Yamaguchi, Katsunori; Ohara, Takuya; Ueda, Shigeru; Takeda, Yoichi.

In: Materials Transactions, Vol. 47, No. 7, 07.2006, p. 1864-1868.

Research output: Contribution to journalArticle

Yamaguchi, Katsunori ; Ohara, Takuya ; Ueda, Shigeru ; Takeda, Yoichi. / Copper enrichment of iron-base alloy scraps by phase separation in liquid Fe-Cu-P and Fe-Cu-P-C systems. In: Materials Transactions. 2006 ; Vol. 47, No. 7. pp. 1864-1868.
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