The use of Fenton's reagent on selective flotation of chalcopyrite and molybdenite

Gde Pandhe Wisnu Suyantara, Tsuyoshi Hirajima, Hajime Miki, Keiko Sasaki

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

1 Citation (Scopus)

Abstract

Hydrogen peroxide (H 2 O 2 ) is frequently used as an oxidizing agent in various applications. It has also been reported to reduce the recovery of sulfide minerals. Moreover, the previous work applied H 2 O 2 aqueous solution in selective flotation of chalcopyrite and molybdenite. However, the oxidation method suffered in pilot scale test due to too long conditioning time. Furthermore, the excessive reagent consumption increased the reagent cost, causing the method not economically feasible. Consequently, further improvement is required to reduce the conditioning time and the reagent consumption. The oxidation performance of H 2 O 2 can be improved by using ferrous iron as catalyst, producing a Fenton's reagent which is more powerful oxidizer than the H 2 O 2 itself. Therefore, the effect of Fenton's reagent on the floatability of chalcopyrite and molybdenite was investigated in this study. The flotation test results show that selective flotation of chalcopyrite and molybdenite might be possible at low concentration of H 2 O 2 aqueous solution by adding ferrous iron. Moreover, the conditioning time could be shortened by this improvement. To understand the phenomenon, surface characterization using atomic force microscopy (AFM) along with x-ray photoelectron spectroscopy (XPS) analysis were carried out. The AFM images show that the surface of chalcopyrite was readily covered with mountainous features which alters its hydrophobicity after the oxidation treatment. Meanwhile, the molybdenite surface remained clean and relatively hydrophobic. The XPS results indicate that the mountainous features are various oxidation products (i.e., FeOOH, Fe 2 (SO 4 ) 3 , CuO, Cu(OH) 2 ). Possible mechanisms of this phenomenon were proposed in this work.

Original languageEnglish
Title of host publicationIMPC 2018 - 29th International Mineral Processing Congress
PublisherCanadian Institute of Mining, Metallurgy and Petroleum
Pages1862-1871
Number of pages10
ISBN (Electronic)9787030227119
Publication statusPublished - Jan 1 2019
Event29th International Mineral Processing Congress, IMPC 2018 - Moscow, Russian Federation
Duration: Sep 17 2018Sep 21 2018

Publication series

NameIMPC 2018 - 29th International Mineral Processing Congress

Other

Other29th International Mineral Processing Congress, IMPC 2018
CountryRussian Federation
CityMoscow
Period9/17/189/21/18

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'The use of Fenton's reagent on selective flotation of chalcopyrite and molybdenite'. Together they form a unique fingerprint.

  • Cite this

    Suyantara, G. P. W., Hirajima, T., Miki, H., & Sasaki, K. (2019). The use of Fenton's reagent on selective flotation of chalcopyrite and molybdenite. In IMPC 2018 - 29th International Mineral Processing Congress (pp. 1862-1871). (IMPC 2018 - 29th International Mineral Processing Congress). Canadian Institute of Mining, Metallurgy and Petroleum.