Applying analysis of mineral surfaces to predict flotation behavior

H. Matsuoka*, R. Kawarabuki, K. Mitsuhashi, M. Kawata, C. Tokoro, K. Haga, A. Shibayama

*Corresponding author for this work

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


The mineral surface characteristic is important for the flotation because it affects the flotation behavior of the mineral. Conventionally, in the flotation process for Cu sulphide ores, the degree of ore floatabilities varies depending on the mineral phase such as chalcopyrite, bornite, or chalcocite. Therefore, mineral surfaces are treated with activators and depressants to control the floatability of target minerals and obtain high recovery performance. There are lots of flotation reagents which have many effects on ores depending on ore characteristics and conditioning methods. For example, sodium hydrosulphide (NaHS) as activator is known to have the effect of re-sulfurizing and activating oxidized surface of chalcocite and bornite. On the other hand, NaHS is reported to depress chalcopyrite floatability. In this study, the evaluation of mineral surfaces was conducted to predict flotation behavior. Activation of Cu minerals (chalcocite, bornite, and chalcopyrite) by NaHS was experimented. The three Cu minerals were treated in two steps. Firstly, they were oxidized in the drying oven. Secondly, they were treated with NaHS solution. After each treatment step, each mineral was measured by contact angle apparatus then analyzed by X-ray photoelectron spectroscopy (XPS). The results of surface characteristics after oxidation and NaHS treatment were utilized to accomplish the study's objective.

Original languageEnglish
Title of host publicationIMPC 2018 - 29th International Mineral Processing Congress
PublisherCanadian Institute of Mining, Metallurgy and Petroleum
Number of pages8
ISBN (Electronic)9787030227119
Publication statusPublished - 2019
Event29th International Mineral Processing Congress, IMPC 2018 - Moscow, Russian Federation
Duration: 2018 Sep 172018 Sep 21

Publication series

NameIMPC 2018 - 29th International Mineral Processing Congress


Other29th International Mineral Processing Congress, IMPC 2018
Country/TerritoryRussian Federation


  • Bornite
  • Chalcocite
  • Chalcopyrite
  • Contact angle
  • Floatability
  • Mineral surface
  • NaHS
  • XPS

ASJC Scopus subject areas

  • Mechanical Engineering
  • Earth-Surface Processes
  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology


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