Flotation behavior of native gold and gold-bearing sulfide minerals in a polymetallic gold ore


ÇİLEK E. C., Tuzci G.

Particulate Science and Technology, vol.40, no.5, pp.558-566, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 40 Issue: 5
  • Publication Date: 2022
  • Doi Number: 10.1080/02726351.2021.1975334
  • Journal Name: Particulate Science and Technology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Chemical Abstracts Core, Communication Abstracts, Compendex, Computer & Applied Sciences, EMBASE, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Page Numbers: pp.558-566
  • Keywords: Gold ore, sphalerite, pyrite, froth flotation, entrainment, kinetics, REFRACTORY GOLD, SELECTIVE FLOTATION, PYRITE FLOTATION, TRUE FLOTATION, COPPER ACTIVATION, ENTRAINMENT, RECOVERY, SPHALERITE, SEPARATION, PARTICLES
  • Süleyman Demirel University Affiliated: Yes

Abstract

© 2021 Taylor & Francis Group, LLC.In this study, the flotation behaviors of gold and gold-associated sulfide minerals (pyrite and sphalerite) in a polymetallic sulfide gold ore were investigated using flotation kinetics parameters. It was found that high gold recovery (>90%) can be achieved by the selective flotation of pyrite and sphalerite. However, the sphalerite flotation results showed that sphalerite could not be separated from pyrite with a high selectivity (selectivity index∼1), because of insufficient depression of pyrite (with high alkaline medium and/or using a depressant). Even if more selective separation was achieved from the pyrite flotation (selectivity index∼5), 40% of sphalerite in the ore was transferred into the pyrite concentrate. In addition, the results of the collectorless tests indicated that more than 80% of the gold can be recovered, and higher selectivity indexes (up to 10) are achievable. Analysis of the particle size distribution of the collectorless flotation concentrate showed that the amount of −40 μm in the concentrate was 90%. In conclusion, a gold concentrate containing low sulfur (10.8%) with a gold recovery of greater than 95% is achievable from a two-stage flow sheet (collectorless flotation as the rougher stage and pyrite flotation as the scavenger stage).