Recovery of molybdenum from copper slags

Tran Van Long, Jose Palacios, Mario Sanches, Takahiro Miki, Yasushi Sasaki, Mitsutaka Hino

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Slags as the by-product of copper making have been produced in large amounts in Chile, and about 5 million tons of slags are estimated to be disposed every year and about 50 million tons have been already accumulated near the mine site. Typical Chilean copper slag contains about 0.3 mass% Mo which is the same to the grade of primary mine production of molybdenite and the copper slags also contain about 40 mass% of Fe and 1 mass% Cu. Recovery of Mo from Chilean copper slags is quite attractive to secure a stable Mo supply. The feasibility of the recovery of Mo from copper slags as Fe-Mo alloys by carbothermic reduction is investigated in the present study. Mo in the copper slag is found to be fully recovered as Fe rich Fe-Mo alloy. The recovered alloy contains about 0.60 mass% Mo and 2.4 mass% Cu. To use the recovered Fe-Mo alloy effectively in the special steel industry, which is the most important market for molybdenum, Cu in the produced Fe-Mo alloy is successfully decreased from 2.4 mass% to 0.1 mass% by using FeS-Na2S flux. Thus, Mo recovery from Chilean copper slag can be promising.

Original languageEnglish
Pages (from-to)1211-1216
Number of pages6
JournalIsij International
Volume52
Issue number7
DOIs
Publication statusPublished - 2012

Keywords

  • Copper slag
  • Cu removal
  • Fe-Mo alloy
  • Mo recovery

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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