TY - JOUR
T1 - Selective flotation of chalcopyrite and molybdenite with H2O2 oxidation
AU - Hirajima, Tsuyoshi
AU - Miki, Hajime
AU - Suyantara, Gde Pandhe Wisnu
AU - Matsuoka, Hidekazu
AU - Elmahdy, Ahmed Mohamed
AU - Sasaki, Keiko
AU - Imaizumi, Yuji
AU - Kuroiwa, Shigeto
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Science Research (JSPS KAKENHI) from the Japan Society for the Promotion of Science (JSPS) – Japan [Grant numbers 15H02333 and 26·04378 )]; and the Ministry of Education, Culture, Sports, Science and Technology Japan (MEXT).
PY - 2017/1/1
Y1 - 2017/1/1
N2 - The selective flotation of chalcopyrite (CuFeS2) and molybdenite (MoS2) was studied using surface oxidation treatments (i.e., ozone (O3) and hydrogen peroxide (H2O2)). The results indicated that the oxidation treatments had different effects on the wettability of chalcopyrite and molybdenite. Single mineral flotation results showed that the H2O2 treatment had higher separation selectivity for molybdenite and chalcopyrite compared with that of the ozone treatment. The contact angle measurement and X-ray photoelectron spectroscopy (XPS) analysis results showed that the chalcopyrite surface became hydrophilic owing to the surface deposition of oxidized iron and copper after the H2O2 treatment. On the other hand, the contact angle of molybdenite slightly increased following the H2O2 treatment at high concentrations. Possible mechanisms of this phenomenon were proposed in this work. Moreover, the separation selectivity of each oxidation method was discussed. Flotation tests using bulk Cu-Mo concentrate showed that H2O2 could deliver a flotation result comparable to conventional Cu-Mo flotation using NaHS.
AB - The selective flotation of chalcopyrite (CuFeS2) and molybdenite (MoS2) was studied using surface oxidation treatments (i.e., ozone (O3) and hydrogen peroxide (H2O2)). The results indicated that the oxidation treatments had different effects on the wettability of chalcopyrite and molybdenite. Single mineral flotation results showed that the H2O2 treatment had higher separation selectivity for molybdenite and chalcopyrite compared with that of the ozone treatment. The contact angle measurement and X-ray photoelectron spectroscopy (XPS) analysis results showed that the chalcopyrite surface became hydrophilic owing to the surface deposition of oxidized iron and copper after the H2O2 treatment. On the other hand, the contact angle of molybdenite slightly increased following the H2O2 treatment at high concentrations. Possible mechanisms of this phenomenon were proposed in this work. Moreover, the separation selectivity of each oxidation method was discussed. Flotation tests using bulk Cu-Mo concentrate showed that H2O2 could deliver a flotation result comparable to conventional Cu-Mo flotation using NaHS.
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U2 - 10.1016/j.mineng.2016.10.007
DO - 10.1016/j.mineng.2016.10.007
M3 - Article
AN - SCOPUS:84992070772
VL - 100
SP - 83
EP - 92
JO - Minerals Engineering
JF - Minerals Engineering
SN - 0892-6875
ER -