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辛基羟肟酸浮选氟碳铈矿机制研究 被引量:19

Flotation Mechanism of Octyl Hydroximic Acid on Bastnaesite
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摘要 采用纯矿物浮选的方法,以松醇油为起泡剂,研究了氟碳铈矿在辛基羟肟酸钠为捕收剂体系下的浮选行为,在p H=7~11范围内,氟碳铈矿回收率大于96%,尤其在p H=9附近,氟碳铈矿的可浮性最好,回收率接近100%;采用傅立叶红外光谱(FT-IR)和X射线光电子能谱(XPS)手段进行作用机制研究,红外光谱表明,辛基羟肟酸钠在氟碳铈矿表面发生了化学吸附;XPS结果表明,氟碳铈矿表面可能只存在-C=O-RE-O-N-一种五元环螯合物;结合La3+和Ce3+离子溶液化学和氟碳铈矿浮选行为,推测La(OH)2+,La(OH)2+,Ce(OH)2+和Ce(OH)2+是存在于氟碳铈矿表面的浮选活性点,并推测了辛基羟肟酸在氟碳铈矿表面作用的模型。 The floatation behavior of bastnaesite was studied in the system of octyl hydroximic acid( OHA) being collector and pine oil as frother by the pure mineral flotation. In the p H range of 7 ~ 11,the recovery of bastnaesite is over 96%,the floatability of bastnaesite is the best and the recovery of bastnaesite is close to 100% especially atp H = 9. Flotation mechanism was studied by measurements of FT-IR and XPS. According to FT-IR test,chemical adsorption took place between OHA and bastnaesite. While according to XPS,may be only one kind of 5 ring member chelate- C = R- RE- O- N- exist on the surface of bastnaesite. Combined the solution chemistry of La3 +and Ce3 +and flotation behavior of bastnaesite,it is concluded that the La( OH)2+,La( OH)2 +,Ce( OH)2+and Ce( OH)2 +are the flotation active points existing on the surface of bastnaesite. The react model of OHA on bastnaesite was speculated.
出处 《中国稀土学报》 CAS CSCD 北大核心 2015年第3期370-377,共8页 Journal of the Chinese Society of Rare Earths
关键词 稀土矿 氟碳铈矿 辛基羟肟酸 XPS 机制研究 rare earth mineral bastnaesite octyl hydroxamic acid XPS mechanism study
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