Synthesis and characterization of a novel collector for the desulfurization of fine high-sulfur bauxite via reverse flotation |
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| Affiliation: | 1. Zhengzhou Non-ferrous Metals Research Institute Co. Ltd., Aluminum Corporation of China, Zhengzhou, 450041, China;2. College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000, China;3. Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Henan Polytechnic University, Jiaozuo, 454000, China;1. College of New Energy, China University of Petroleum (East China), Qingdao, 266580, China;2. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, China;1. School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212000, China;2. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212000, China;1. Department of Epidemiology and Environmental Health, School of Public and Health Professions, University at Buffalo, Buffalo, 14214, USA;2. Department of Earth Science and Geography, California State University, Dominguez Hills, Carson, 90747, USA;3. Department of Environmental Science, Baylor University, Waco, 76798, USA;1. College of Information and Electrical Engineering, China Agricultural University, Beijing, 100083, China;2. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, 100190, China;1. School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China;2. Shanxi Engineering Technology Research Center for Ultrafine Powder, North University of China, Taiyuan, 030051, China;3. School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China;4. Institute of Occupational Health of Ordnance Industry, Xi''an, 710065, China |
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| Abstract: | Bauxite is one of the main raw materials in the alumina industry. Fine high-sulfur bauxite flotation desulfurization is a great challenge presently. This study aims to synthesize nanoparticle collectors (NPCs) by emulsion polymerization to improve the abovesaid flotation desulfurization process. The physicochemical properties of high-sulfur bauxite were analyzed, and the experimental conditions for the synthesis of NPCs were optimized. The interaction mechanism between NPCs and pyrite was studied via fundamental analyses including SEM (Scanning Electron Microscope), FT-IR (Fourier Transform Infrared spectoscopy), Zeta-potential, XPS (X-ray Photoelectron Spectroscopy), and wettability. Under the closed-circuit flotation flowsheet of “one roughing-two cleaning-three scavenging”, aluminum concentrate with a yield of 85.91% and sulfur content of 0.56% were obtained using a common collector. However, with the addition of the novel NPC, aluminum concentrate with a yield of 85.70% and sulfur content of 0.36% could be obtained by a simpler flowsheet of “one roughing-one cleaning-two scavenging”. The improvement in flotation performance is suggested to be contributed by the addition of spherical NPC, which induced a rougher and more hydrophobic pyrite surface. |
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| Keywords: | Bauxite Flotation desulfurization Nanoparticle collector Pyrite |
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