講演情報
[3K0401-08-02]Selective separation of molybdenite from chalcocite using flotation under oxidizing condition
○Gde Pandhe Wisnu Suyantara1, Daniyarov Berdakh1, Hajime Miki1, Tsuyoshi Hirajima1, Keiko Sasaki1, Akbarshokh Ulmaszoda1, Ryota Nakao1, Daishi Ochi2, Yuji Aoki2 (1. Department of Earth Resources Engineering, Kyushu University, 2. Sumitomo Metal Mining Co., Ltd.)
司会：芳賀 一寿（秋田大学）
キーワード：
selective flotation、hydrogen peroxide、molybdenite、chalcocite、oxidation treatment
There is a scarcity of research that has specifically examined the process of selectively separating molybdenite from secondary copper sulfide minerals, such as chalcocite, using flotation. This research assessed the effectiveness of oxidation treatment using hydrogen peroxide (H2O2) in separating molybdenite from chalcocite. The effects of H2O2 concentration, oxidation treatment duration, and pH level were evaluated in this study. The flotation experiments conducted on chalcocite revealed that the treatment with H2O2 resulted in a significant decrease in the recovery of chalcocite. This was attributed to the creation of copper hydroxide and sulfate compounds on the surface of chalcocite, which caused a change in its hydrophobic properties. Conversely, the limited surface oxidation of molybdenite resulted in a significant increase in flotation recovery after the oxidation treatment. The application of oxidation treatment using a 10 mM H2O2 solution at a pH of 9 for a duration of 20 minutes yielded an 87% separation efficiency between molybdenite and chalcocite. The findings indicate that the use of H2O2 oxidation treatment allows for the selective flotation of molybdenite, effectively separating it from chalcocite.