Copper enrichment of scrap by phase separation in liquid Fe-Cu-C system

Katsunori Yamaguchi, Yoichi Takeda

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A mixture of iron, copper and carbon was melted in a carbon crucible at 1453K. The top layer which was rich in iron and the bottom layer which was rich in copper were clearly separated in the crucible. We could thus make fundamental experiment to carry out a phase separation for copper recovery from iron scrap containing copper. One of the focuses is how an extra element to the Fe-Cu-C ternary system affects the phase separation. We added Cr, Mn, Al, Si or S to Fe-Cu-C ternary system, and determined the compositions of miscibility gap at 1453K under carbon saturation. In some cases scrap contains precious metal. On this account the recovery distribution ratios of precious metal were also measured The alloy compositions on the miscibility gap in the Fe-Cu-C system are 91.1%Fe-4.7%Cu-4.2%C and 96.7%Cu-3.3%Fe. Addition of aluminum, Silicon or sulfur causes the gap to narrow. An increase in carbon solubility in the phase rich in iron reduces copper solubility, which affects recovery of copper from scrap. The relation between copper and carbon solubility in the phase rich in iron is (%Cu)=0.68(%C)2-7.26(%C)+22.77. Gold, silver and palladium are enriched in the phase rich in iron. Platinum distributes both phases equally. The activity coefficients of Ag, Au, Pd and Pt were estimated from the distribution ratios.

Original languageEnglish
Pages (from-to)26-37
Number of pages12
JournalMetallurgical Review of MMIJ (Mining and Metallurgical Institute of Japan)
Volume15
Issue number1
Publication statusPublished - 1998 Jul
Externally publishedYes

Fingerprint

Phase separation
Copper
Carbon
Iron
Solubility
Liquids
Crucibles
Ternary systems
Precious metals
Recovery
Iron scrap
Saturation (materials composition)
Activity coefficients
Palladium
Silicon
Platinum
Aluminum
Chemical analysis
Silver
Sulfur

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Copper enrichment of scrap by phase separation in liquid Fe-Cu-C system. / Yamaguchi, Katsunori; Takeda, Yoichi.

In: Metallurgical Review of MMIJ (Mining and Metallurgical Institute of Japan), Vol. 15, No. 1, 07.1998, p. 26-37.

Research output: Contribution to journalArticle

@article{3952da695c5f4e1899ad4b706be0932d,
title = "Copper enrichment of scrap by phase separation in liquid Fe-Cu-C system",
abstract = "A mixture of iron, copper and carbon was melted in a carbon crucible at 1453K. The top layer which was rich in iron and the bottom layer which was rich in copper were clearly separated in the crucible. We could thus make fundamental experiment to carry out a phase separation for copper recovery from iron scrap containing copper. One of the focuses is how an extra element to the Fe-Cu-C ternary system affects the phase separation. We added Cr, Mn, Al, Si or S to Fe-Cu-C ternary system, and determined the compositions of miscibility gap at 1453K under carbon saturation. In some cases scrap contains precious metal. On this account the recovery distribution ratios of precious metal were also measured The alloy compositions on the miscibility gap in the Fe-Cu-C system are 91.1{\%}Fe-4.7{\%}Cu-4.2{\%}C and 96.7{\%}Cu-3.3{\%}Fe. Addition of aluminum, Silicon or sulfur causes the gap to narrow. An increase in carbon solubility in the phase rich in iron reduces copper solubility, which affects recovery of copper from scrap. The relation between copper and carbon solubility in the phase rich in iron is ({\%}Cu)=0.68({\%}C)2-7.26({\%}C)+22.77. Gold, silver and palladium are enriched in the phase rich in iron. Platinum distributes both phases equally. The activity coefficients of Ag, Au, Pd and Pt were estimated from the distribution ratios.",
author = "Katsunori Yamaguchi and Yoichi Takeda",
year = "1998",
month = "7",
language = "English",
volume = "15",
pages = "26--37",
journal = "Metallurgical Review of MMIJ (Mining and Metallurgical Institute of Japan)",
issn = "0289-6214",
publisher = "Mining and Materials Processing Institute of Japan",
number = "1",

}

TY - JOUR

T1 - Copper enrichment of scrap by phase separation in liquid Fe-Cu-C system

AU - Yamaguchi, Katsunori

AU - Takeda, Yoichi

PY - 1998/7

Y1 - 1998/7

N2 - A mixture of iron, copper and carbon was melted in a carbon crucible at 1453K. The top layer which was rich in iron and the bottom layer which was rich in copper were clearly separated in the crucible. We could thus make fundamental experiment to carry out a phase separation for copper recovery from iron scrap containing copper. One of the focuses is how an extra element to the Fe-Cu-C ternary system affects the phase separation. We added Cr, Mn, Al, Si or S to Fe-Cu-C ternary system, and determined the compositions of miscibility gap at 1453K under carbon saturation. In some cases scrap contains precious metal. On this account the recovery distribution ratios of precious metal were also measured The alloy compositions on the miscibility gap in the Fe-Cu-C system are 91.1%Fe-4.7%Cu-4.2%C and 96.7%Cu-3.3%Fe. Addition of aluminum, Silicon or sulfur causes the gap to narrow. An increase in carbon solubility in the phase rich in iron reduces copper solubility, which affects recovery of copper from scrap. The relation between copper and carbon solubility in the phase rich in iron is (%Cu)=0.68(%C)2-7.26(%C)+22.77. Gold, silver and palladium are enriched in the phase rich in iron. Platinum distributes both phases equally. The activity coefficients of Ag, Au, Pd and Pt were estimated from the distribution ratios.

AB - A mixture of iron, copper and carbon was melted in a carbon crucible at 1453K. The top layer which was rich in iron and the bottom layer which was rich in copper were clearly separated in the crucible. We could thus make fundamental experiment to carry out a phase separation for copper recovery from iron scrap containing copper. One of the focuses is how an extra element to the Fe-Cu-C ternary system affects the phase separation. We added Cr, Mn, Al, Si or S to Fe-Cu-C ternary system, and determined the compositions of miscibility gap at 1453K under carbon saturation. In some cases scrap contains precious metal. On this account the recovery distribution ratios of precious metal were also measured The alloy compositions on the miscibility gap in the Fe-Cu-C system are 91.1%Fe-4.7%Cu-4.2%C and 96.7%Cu-3.3%Fe. Addition of aluminum, Silicon or sulfur causes the gap to narrow. An increase in carbon solubility in the phase rich in iron reduces copper solubility, which affects recovery of copper from scrap. The relation between copper and carbon solubility in the phase rich in iron is (%Cu)=0.68(%C)2-7.26(%C)+22.77. Gold, silver and palladium are enriched in the phase rich in iron. Platinum distributes both phases equally. The activity coefficients of Ag, Au, Pd and Pt were estimated from the distribution ratios.

UR - http://www.scopus.com/inward/record.url?scp=0032121019&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032121019&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032121019

VL - 15

SP - 26

EP - 37

JO - Metallurgical Review of MMIJ (Mining and Metallurgical Institute of Japan)

JF - Metallurgical Review of MMIJ (Mining and Metallurgical Institute of Japan)

SN - 0289-6214

IS - 1

ER -