Extraction of valuable metals from incineration metal residue in molten state

Katsunori Yamaguchi, Yoichi Takeda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Amount of metal residue from incinerators or melting furnaces of incinerator bottom ash has been increased in Japan. The metal residue contains valuable metals such as copper, silver and gold. Main components of the metal residue are copper, phosphorus, silicon and iron of the remainder. Copper content is 5 to 20% and too low to recover the valuable metals in a conventional copper smelter, so a new approach to upgrading the valuable metals with phase separation in molten metal system was researched. Whereas the binary melt of iron and copper is miscible over all composition, the addition of carbon or phosphorus to the binary melt leads to phase separation between an iron phase and a copper phase. The copper phase absorbing the precious metals is feasible for refining in a conventional copper smelter. Fundamental information about the phase separation, recovery of copper and distribution ratio of the valuable metals are presented.

Original languageEnglish
Title of host publicationREWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology - Proceedings
EditorsI. Gaballah, B. Mishra, R. Solozabal, M. Tanaka
Pages1629-1636
Number of pages8
Publication statusPublished - 2005 Dec 1
EventREWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology - Madrid, Spain
Duration: 2004 Sep 262004 Sep 29

Publication series

NameREWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology

Conference

ConferenceREWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology
CountrySpain
CityMadrid
Period04/9/2604/9/29

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Yamaguchi, K., & Takeda, Y. (2005). Extraction of valuable metals from incineration metal residue in molten state. In I. Gaballah, B. Mishra, R. Solozabal, & M. Tanaka (Eds.), REWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology - Proceedings (pp. 1629-1636). (REWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology).