Effect of hydrogen peroxide on selective flotation of chalcocite and enargite  

作　　者：Gde Pandhe Wisnu Suyantara Daniyarov Berdakh Hajime Miki Tsuyoshi Hirajima Keiko Sasaki Daishi Ochi Yuji Aoki 

机构地区：[1]Department of Earth Resources Engineering,Faculty of Engineering,Kyushu University,Fukuoka 819-0395,Japan [2]Kyushu University Institute for Asian and Oceanian Studies,Kyushu University,Fukuoka 819-0395,Japan [3]Graduate School of Engineering,Faculty of Engineering,Kyushu University,Fukuoka 819-0395,Japan [4]Uzbekistan-Japan Innovation Center of Youth,Tashkent 100095,Uzbekistan [5]Sumitomo Metal Mining Co.,Ltd.,Tokyo 105-8716,Japan [6]Sumitomo Metal Mining Co.,Ltd.,Ehime 792-0002,Japan

出　　处：《International Journal of Mining Science and Technology》2023年第6期703-716,共14页矿业科学技术学报（英文版）

基　　金：Sumitomo Metal Mining Co.,Ltd.,Japan International Cooperation Agency(JICA),and a Grant-inAid for Science Research(JSPS KAKENHI)from the Japan Society for the Promotion of Science(JSPS)(Nos.JP22K14636,JP22H00310 and JP19H02659);This work was partly supported by Advanced Research Infrastructure for Materials and Nanotechnology(No.JPMXP1222KU1009)in Japan sponsored by the Ministry of Education,Culture,Sports,Science and Technology(MEXT),Japan.

摘　　要：Enargite is typically associated with chalcocite.Owing to the similarity in the flotation behaviors of these minerals,both minerals are reported to concentrate in the conventional flotation circuit.However,inorganic arsenic in enargite can decrease the copper concentrate quality and increase the operating cost of processing this concentrate.Separating these minerals is important for cleaner copper production to avoid these effects.In this context,this study investigated the effect of hydrogen peroxide(H_(2)O_(2))treatment on the flotation behavior of chalcocite and enargite.Flotation tests of pure and mixed minerals indicated that H_(2)O_(2)treatment reduced the floatability of chalcocite and enargite by forming sulfate and copper hydroxide on their surfaces.Despite the detrimental effect of the H_(2)O_(2)treatment,there was a narrow window of H_(2)O_(2)concentration for separating both minerals,in which enargite floated and chalcocite was depressed.This selective flotation behavior was caused by the rapid adsorption of potassium amyl xanthate(KAX)and lower surface oxidation of enargite compared with that of chalcocite.

关 键 词：ENARGITE CHALCOCITE Hydrogen peroxide Potassium amyl xanthate Selective flotation 

分 类 号：TD95[矿业工程—选矿] TD923