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 language | English |
|---|---|
| Title of host publication | IMPC 2018 - 29th International Mineral Processing Congress |
| Publisher | Canadian Institute of Mining, Metallurgy and Petroleum |
| Pages | 1862-1871 |
| Number of pages | 10 |
| ISBN (Electronic) | 9787030227119 |
| Publication status | Published - Jan 1 2019 |
| Event | 29th International Mineral Processing Congress, IMPC 2018 - Moscow, Russian Federation Duration: Sep 17 2018 → Sep 21 2018 |
Publication series
| Name | IMPC 2018 - 29th International Mineral Processing Congress |
|---|
Other
| Other | 29th International Mineral Processing Congress, IMPC 2018 |
|---|---|
| Country | Russian Federation |
| City | Moscow |
| Period | 9/17/18 → 9/21/18 |
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All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Earth-Surface Processes
- Geochemistry and Petrology
- Geotechnical Engineering and Engineering Geology
Cite this
The use of Fenton's reagent on selective flotation of chalcopyrite and molybdenite. / Suyantara, Gde Pandhe Wisnu; Hirajima, Tsuyoshi; Miki, Hajime; Sasaki, Keiko.
IMPC 2018 - 29th International Mineral Processing Congress. Canadian Institute of Mining, Metallurgy and Petroleum, 2019. p. 1862-1871 (IMPC 2018 - 29th International Mineral Processing Congress).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - The use of Fenton's reagent on selective flotation of chalcopyrite and molybdenite
AU - Suyantara, Gde Pandhe Wisnu
AU - Hirajima, Tsuyoshi
AU - Miki, Hajime
AU - Sasaki, Keiko
PY - 2019/1/1
Y1 - 2019/1/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:85059434645
T3 - IMPC 2018 - 29th International Mineral Processing Congress
SP - 1862
EP - 1871
BT - IMPC 2018 - 29th International Mineral Processing Congress
PB - Canadian Institute of Mining, Metallurgy and Petroleum
ER -