Separation of fines by flotation techniques |
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| Affiliation: | 1. Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, PR China;2. School of Chemistry and Chemical Engineering, Xi''an University of Science and Technology, Xi''an 710054, PR China;1. Key Laboratory of High-efficiency and Clean Mechanical Manufacture, National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan, Shandong 250061, China;2. Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China;3. Clean Energy Institute, Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China;4. Department of Chemical Engineering, The University of Newcastle, Callaghan 2308, Australia;1. The University of Queensland, School of Chemical Engineering, Brisbane, Queensland, Australia;2. The University of Sheffield, Department of Chemical and Biological Engineering, Mappin Street, Sheffield S1 3JD, UK |
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| Abstract: | A large amount of valuable minerals is discarded today as fines and ultrafines because of inadequate technology to process them economically. Treatment of fine particles presents a difficult problem in the chemical industry and raw materials processing, and its solution is required both in production and effluent treatment. This article reviews various suitable flotation techniques—such as precipitate flotation, flocculation-flotation, column flotation, dissolved-air flotation, and electrolytic flotation and presents different laboratory experiments with fines (mostly at the subsieve size range) as examples. Also included is the conventional froth flotation and particularly the effect of bubbles size on performance. Although froth flotation is a commonly applied selective separation process in mineral processing, it becomes inefficient for beneficiating fines. In the closing overview of the process, several ideas for future research are suggested. |
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