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Correlation of surface oxidation with xanthate adsorption and pyrite flotation

文献类型：期刊论文

作者Niu, Xiaopeng3,4; Chen, Jianhua2,5; Li, Yuqiong2,5; Xia, Liuyin1; Li, Li4; Sun, Heyun4; Ruan, Renman4
刊名APPLIED SURFACE SCIENCE
出版日期2019-11-30
卷号495页码:9
关键词Surface oxidation Xanthate adsorption Pyrite flotation
ISSN号0169-4332
DOI10.1016/j.apsusc.2019.07.153
英文摘要Various studies have emphasized the importance of surface oxidation of sulfide minerals with regard to xanthate adsorption and their flotation response. However, the correlation between pyrite surface oxidation, xanthate adsorption and its flotation response has not been clearly established. The complexity lies in various intermediate sulfur oxidation products in different solution conditions. Thus, investigation of sulfur oxidation behavior is the key to understand pyrite oxidation. Ion chromatography (IC) and high performance liquid chromatography (HPLC) results showed an increase in the total amounts of occurring sulfur species with increasing slurry pH. Meanwhile, the ratio of S-0/sulfur oxyanions was to become lower; X-ray Photoelectron Spectroscopy (XPS) identified the oxidized pyrite surface was rich in SO42- and FeOOH. Both the contact angle results and single mineral flotation data indicated that the more pyrite surface oxidized, the lower hydrophobicity and floatability were. Time-of-flight secondary ion mass spectroscopy (Tof-SIMS) was adopted to analyse xanthate adsorption on the surface of pyrite under conditions of either sufficient oxidation or on freshly polished surface which is assumed little oxidation. A significantly lower intensities of C4H9O and C4H9OCSS was found on the intensely oxidized pyrite surface, indicating xanthate adsorption had strong selectivity on FeS2 rather than FeOOH. The experimental results were further confirmed by theoretical calculation. The self-consistent charge density functional tight binding (SCC-DFTB) calculations indicated that the distances between the xanthate S atoms and surface Fe atoms of FeOOH were larger than the atomic radius of S-Fe. Essentially, the different electron configurations of their Fe atoms led to the selective adsorption of xanthate on FeOOH and FeS2 surfaces in terms of the coordination chemistry theory. This work provides valuable implications for understanding the correlation of surface oxidation, xanthate adsorption and its floatation behavior to mediate pyrite flotation.
WOS关键词SELECTIVE FLOTATION ; CHEMISTRY ; STATE ; FLOATABILITY ; THIOSULFATE ; CHALCOCITE ; MECHANISMS ; GALENA ; OXYGEN ; GOLD
资助项目National Natural Science Foundation of China[51674231] ; National Natural Science Foundation of China[51574092] ; National Natural Science Foundation of China[51764002] ; National Natural Science Foundation of China[51874106] ; Key Research Program of Chinese Academy of Sciences[ZDRW-ZS-2018-1]
WOS研究方向Chemistry ; Materials Science ; Physics
语种英语
WOS记录号WOS:000486177700049
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Key Research Program of Chinese Academy of Sciences
源URL[http://ir.ipe.ac.cn/handle/122111/30894]  
专题中国科学院过程工程研究所
通讯作者Ruan, Renman
作者单位1.Saskatchewan Res Council, Saskatoon, SK, Canada
2.Guangxi Univ, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, Nanning 530004, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing, Peoples R China
5.Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China
推荐引用方式
GB/T 7714		 Niu, Xiaopeng,Chen, Jianhua,Li, Yuqiong,et al. Correlation of surface oxidation with xanthate adsorption and pyrite flotation[J]. APPLIED SURFACE SCIENCE,2019,495:9.
APA Niu, Xiaopeng.,Chen, Jianhua.,Li, Yuqiong.,Xia, Liuyin.,Li, Li.,...&Ruan, Renman.(2019).Correlation of surface oxidation with xanthate adsorption and pyrite flotation.APPLIED SURFACE SCIENCE,495,9.
MLA Niu, Xiaopeng,et al."Correlation of surface oxidation with xanthate adsorption and pyrite flotation".APPLIED SURFACE SCIENCE 495(2019):9.

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来源：过程工程研究所

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