Selective chalcopyrite flotation from pyrite with glycerine-xanthate as depressant |
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| Affiliation: | 1. Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China;2. State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, China;1. School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia;2. Pionera, P.O. Box 162, NO-1701 Sarpsborg, Norway;1. School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China;2. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China;2. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;2. Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China;3. Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada;1. School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia;2. Pionera, P.O. Box 162, NO-1701 Sarpsborg, Norway |
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| Abstract: | Micro-flotation tests, adsorption, electrokinetic and FTIR measurements were carried out in order to investigate the selective depression mechanism of sodium glycerine-xanthate (SGX) on pyrite in chalcopyrite flotation. The flotation results showed a large difference in chalcopyrite (>85%) and pyrite (<30%) recovery as stirred pulp-mixing with SGX before the addition of collector sodium butyl xanthate (SBX), at the range of pH 7–10. A much stronger adsorption of SGX on pyrite than chalcopyrite was dramatically revealed by zeta potential measurements, which can explain the better floatability of chalcopyrite than pyrite. The adsorption of SBX onto pyrite was depressed intensely while that onto chalcopyrite was affected slightly when SGX was used as depressant, because of more stronger adsorption between SGX and SBX occurring onto the pyrite surfaces. The absorbed amount of SGX on chalcopyrite increases slightly, over the pH range from 3 to 12, while that on pyrite increases rapidly with the increased SGX concentration, which is consistent with the flotation results. FTIR reflection spectroscopic measurements further demonstrated the depression effect of pre-absorbed SGX on SBX adsorption, which is attributed to its hydrophilic hydroxyl groups. |
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| Keywords: | SGX Adsorption Pyrite Zeta-potential FTIR |
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