Chenhu Zhang
Central South University
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Publication
Featured researches published by Chenhu Zhang.
Journal of Colloid and Interface Science | 2018
Chenhu Zhang; Sun Wei; Yuehua Hu; Honghu Tang; Jiande Gao; Zhigang Yin; Qingjun Guan
Selective adsorption of tannic acid (TA) on calcite surfaces and the implications of this process for the separation of fluorite ore were studied by microflotation tests, surface adsorption experiments, zeta potential measurements, UV-vis analysis, and X-ray photoelectron spectroscopy (XPS) analysis. The microflotation tests indicated that TA, when added before sodium oleate (NaOl), could selectively depress calcite from fluorite at pH 7. Surface adsorption experiments revealed that TA hinders the interaction of NaOl with calcite. The zeta potential of calcite became more negative with TA than with NaOl. However, the characteristic features of TA adsorption were not observed on fluorite, suggesting that the dominant adsorption sites are dissimilar on the fluorite and calcite surfaces in the pulp. UV-vis spectroscopy, XPS, and solution chemistry analysis were utilized to obtain a better understanding of the mechanism for selective adsorption of TA as well as the key factors determined by the Ca2+ and Ca(OH)+ components on the mineral surfaces. A possible adsorption mechanism along with an adsorption mode is proposed for the surface interaction between TA and calcite.
Transactions of Nonferrous Metals Society of China | 2017
Zhigang Yin; Wei Sun; Hu Yuehua; Qingjun Guan; Chenhu Zhang; Yue-sheng Gao; Jihua Zhai
Abstract This work focuses on the organic depressant, disodium bis(carboxymethyl) trithiocarbonate (DBT), as a selective depressant in copper-molybdenum sulfide flotation separation. Micro-flotation, Zeta potential, FTIR and XPS measurements were carried out to investigate the selective depression mechanism of DBT on chalcopyrite. Zeta potential and FTIR measurements revealed that DBT had higher affinity for chalcopyrite than molybdenite and the XPS results of chalcopyrite before and after treatment with DBT further proved that DBT adsorbed on chalcopyrite surface. The investigation indicates that the mechanism of DBT adsorbing on chalcopyrite is mainly physical adsorption. Locked circuit experiments were carried out and the results showed that DBT could be considered as a cleaner option in commercial Cu-Mo flotation separation circuits.
Separation and Purification Technology | 2017
Zhigang Yin; Wei Sun; Yuehua Hu; Chenhu Zhang; Qingjun Guan; Runqing Liu; Pan Chen; Mengjie Tian
Applied Surface Science | 2018
Yuehua Hu; Jianyong He; Chenhu Zhang; Chenyang Zhang; Wei Sun; Dongbo Zhao; Pan Chen; Haisheng Han; Zhiyong Gao; Runqing Liu; Li Wang
Journal of Cleaner Production | 2018
Zhigang Yin; Wei Sun; Yuehua Hu; Chenhu Zhang; Qingjun Guan; Kangping Wu
Journal of Industrial and Engineering Chemistry | 2017
Zhigang Yin; Wei Sun; Yuehua Hu; Runqing Liu; Wei Jiang; Chenhu Zhang; Qingjun Guan; Chenyang Zhang
International journal of mining science and technology | 2016
Zhigang Yin; Wei Sun; Jiandong Liu; Yuehua Hu; Qingjun Guan; Chenhu Zhang; Honghu Tang; Changping Guan
Langmuir | 2018
Zhigang Yin; Yuehua Hu; Wei Sun; Chenyang Zhang; Jianyong He; Zhijie Xu; Jingxiang Zou; Changping Guan; Chenhu Zhang; Qingjun Guan; Shangyong Lin; Sultan Ahmed Khoso
Physicochemical Problems of Mineral Processing | 2018
Chenhu Zhang; Zhiyong Gao; Yuehua Hu; Wei Sun; Honghu Tang; Zhigang Yin; Jianyong He; Qingjun Guan; Yangge Zhu
Journal of the American Ceramic Society | 2018
Qingjun Guan; Wei Sun; Yuehua Hu; Zhigang Yin; Chenhu Zhang; Changping Guan; Xiangnan Zhu; Sultan Ahmed Khoso