資源・素材2023（松山）
2023年9月12日〜9月14日愛媛大学 城北キャンパス
資源・素材2023（松山）
2023年9月12日〜9月14日愛媛大学 城北キャンパス
[1101-08-02]（学生発表：修士課程）Study of pyrite depression for producing a high-grade copper concentrate from a complex copper ore
Gde Pandhe Wisnu Suyantara1, ○Akbarshokh Ulmaszoda2, Hajime Miki1, Keiko Sasaki1, Taisuke Sakakibara3, Hisatoshi Furuya3, Satoru Okubo3(1. Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 2. Graduate school of Engineering, Faculty of Engineering, Kyushu University, 3. Japan Organization for Metals and Energy Security (JOGMEC))
司会者：橋本 晃一（JOGMEC）
The copper-activated pyrite flotation reduces the quality of the copper concentrate and affects the downstream process. This study investigated various treatments using di- and tri-carboxylic acids and iron precipitates to reduce copper-activated pyrite flotation. The flotation tests were performed using pure pyrite and chalcopyrite. The flotation results show that iron precipitates and di- and tri-carboxylic acids prevented copper-activated pyrite flotation. Further flotation tests using a complex copper ore confirmed the reduction of copper-activated pyrite flotation. Additionally, using iron precipitates and dicarboxylic acid treatments in the cleaner flotation after the rougher flotation with sodium sulfite produced the optimum pyrite depression. This flotation circuit with iron precipitates treatment improved the copper grade from 16.3% to 25.4% and reduced the pyrite recovery from 28.1% to 18.2%, with a final copper recovery of 85.8%.