The effects of Ca(II) and Mg(II) ions on the flotation of spodumene using NaOL |
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| Affiliation: | 1. School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, PR China;2. Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, PR China;3. Institute of Multipurpose Utilization of Mineral Resources, CAGS, Chengdu 610000, PR China;1. Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, PR China;2. School of Resources Processing and Bioengineering, Central South University, Changsha, Hunan, PR China;3. Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Science, Chengdu, Sichuan, PR China;1. School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, Sichuan, PR China;2. School of Chemical Engineering, Sichuan University, Chengdu, Sichuan, PR China;3. Key Laboratory of Biohydrometallurgy, Ministry of Education, School of Resources Processing and Bioengineering, Central South University, Changsha, Hunan, PR China;4. Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, Hubei, PR China;1. Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, PR China;2. School of Resources Processing and Bioengineering, Central South University, Changsha, Hunan, PR China;3. State Key Laboratory of Mineral Processing, Beijing, PR China;4. Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Science, Chengdu, Sichuan, PR China;1. College of Resource and Civil Engineering, Northeastern University, Shenyang, 110819, Liaoning, China;2. National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources, Shenyang, 110819, Liaoning, China;1. Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China;2. School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China;3. State Key Laboratory of Mineral Processing, Beijing 102628, China |
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| Abstract: | The effects of Ca(II) and Mg(II) ions on the flotation of spodumene using sodium oleate (NaOL) as the collector were investigated by micro-flotation tests, zeta-potential measurements, absorption measurements, Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) analyses. The micro-flotation results indicated that the pH value has a significant influence on the activation of spodumene minerals by Ca(II) and Mg(II) ions. Good floatability of spodumene was obtained with Ca(II) and Mg(II) ions at a pH of 12.5 and 10.0, respectively. In strongly alkaline solutions, Ca(II) and Mg(II) ions readily form hydroxy complexes (CaOH(I) and MgOH(I)) and precipitates (Ca(OH)2 and Mg(OH)2). FT-IR and XPS analyses revealed that the hydroxy complexes and the precipitates adsorbed onto the spodumene surface. These species contributed to the formation of oleate complexes and thus increased the amount of collector adsorption and the floatability of spodumene. |
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| Keywords: | Spodumene Ca(II) Mg(II) Flotation Mechanism |
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