Selective flotation of chalcopyrite and molybdenite using H2O2 oxidation method with the addition of ferrous sulfate

被引:77
作者
Suyantara, Gde Pandhe Wisnu [1 ]
Hirajima, Tsuyoshi [1 ]
Miki, Hajime [1 ]
Sasaki, Keiko [1 ]
Yamane, Masashi [2 ]
Takida, Eri [2 ]
Kuroiwa, Shigeto [2 ]
Imaizumi, Yuji [2 ]
机构
[1] Kyushu Univ, Dept Earth Resources Engn, Fac Engn, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan
[2] Sumitomo Met Min Co Ltd, 17-5 Isouracho, Niihama, Ehime, Japan
基金
日本学术振兴会;
关键词
Selective flotation; Molybdenite; Chalcopyrite; Hydrogen peroxide; Ferrous sulfate; X-RAY PHOTOELECTRON; HYDROGEN-PEROXIDE; WASTE-WATER; CATALYTIC DECOMPOSITION; ION-BOMBARDMENT; SODIUM SULFIDE; IRON; SURFACE; COPPER; SPECTROSCOPY;
D O I
10.1016/j.mineng.2018.02.005
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Hydrogen peroxide (H2O2) has been used as an oxidizing agent in the selective flotation of chalcopyrite and molybdenite. However, this method required relatively high concentration of H2O2 to deliver flotation results (i.e., mineral grades and recoveries) comparable to those obtained by the conventional copper-molybdenum (Cu-Mo) ores flotation using sodium hydrosulfide (NaHS). Therefore, further improvements are needed to reduce the consumption of H2O2 reagent. In this study, ferrous sulfate (FeSO4) was used to enhance the oxidation performance of H2O2 through Fenton-like reactions. Flotation results showed that the consumption of H2O2 reagent could be reduced by the addition of FeSO4 without losing the flotation selectivity. The reason might be caused by increasing of oxidation performance as indicated by the increasing concentration of dissolved oxygen after the addition of FeSO4 into the H2O2 aqueous solution. Surface analysis using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) images showed that the surface of chalcopyrite was covered by more hydrophilic precipitates after the oxidation treatment using H2O2 aqueous solution with the addition of FeSO4, thus more hydrophilic surface and lower floatability. On the other hand, the surface of molybdenite was slightly oxidized and its surface remained hydrophobic as confirmed from contact angle results. Flotation tests using Cu-Mo bulk concentrate demonstrated that selective flotation might be possible using a mixture of FeSO4 and H2O2 aqueous solution. Moreover, this new method could be used as an alternative to copper depressant in Cu-Mo selective flotation, replacing the NaHS reagent.
引用
收藏
页码:312 / 326
页数:15
相关论文
共 66 条
[1]   Floatability of chalcopyrite and molybdenite in the presence of lignosulfonates. Part I. Adsorption studies [J].
Ansari, Anita ;
Pawlik, Marek .
MINERALS ENGINEERING, 2007, 20 (06) :600-608
[2]   Floatability of chalcopyrite and molybdenite in the presence of lignosulfonates. Part II. Hallimond tube flotation [J].
Ansari, Anita ;
Pawlik, Marek .
MINERALS ENGINEERING, 2007, 20 (06) :609-616
[3]  
Arbiter N., 1951, FLOTATION RECOVERY M
[4]   THE INFLUENCE OF SURFACE OXIDATION OF CHALCOCITE ON ITS FLOATABILITY AND ETHYL XANTHATE SORPTION [J].
BARZYK, W ;
MALYSA, K ;
POMIANOWSKI, A .
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 1981, 8 (01) :17-29
[5]   XPS ANALYSIS OF LITHIUM INTERCALATION IN THIN-FILMS OF MOLYBDENUM OXYSULFIDES [J].
BENOIST, L ;
GONBEAU, D ;
PFISTERGUILLOUZO, G ;
SCHMIDT, E ;
MEUNIER, G ;
LEVASSEUR, A .
SURFACE AND INTERFACE ANALYSIS, 1994, 22 (1-12) :206-210
[6]   STUDY BY PHOTOELECTRON-SPECTROSCOPY OF SURFACE DEGRADATION OF FES2, CUFES2 ZNS AND PBS EXPOSED TO AIR AND WATER [J].
BRION, D .
APPLICATIONS OF SURFACE SCIENCE, 1980, 5 (02) :133-152
[7]   AN X-RAY PHOTOELECTRON SPECTROSCOPIC STUDY OF THE OXIDATION OF CHALCOPYRITE [J].
BUCKLEY, AN ;
WOODS, R .
AUSTRALIAN JOURNAL OF CHEMISTRY, 1984, 37 (12) :2403-2413
[8]  
Bulatovic SM, 2007, HANDBOOK OF FLOTATION REAGENTS: CHEMISTRY, THEORY AND PRACTICE: FLOTATION OF SULFIDES ORES, VOL 1, P1
[9]   A geochemical model for removal of iron(II)(aq) from mine water discharges [J].
Burke, SP ;
Banwart, SA .
APPLIED GEOCHEMISTRY, 2002, 17 (04) :431-443
[10]  
Chimonyo W., 2016, USE OXIDIZING AGENTS