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, the proportion of bastnaesite in the bulk concentrate increases as the RE grade improves. Adsorption mechanism of LF8# on the surfaces of bastnaesite and monazite were confirmed via zeta potential, UV... on the surface of bastnaesite and monazite decreases with increasing the temperature, the amount of stable adsorbed predominance of characteristic bonds(-C(=O)N-) from LF8# uptake on bastnaesite surfaces......
(OH)2 and NaOH.Roasting experiments and leaching experiments were carried out to study the decomposition of rare earth minerals.The results indicated that bastnaesite and monazite could be completely decomposed at 650 ℃ and the leaching ratio of rare earths could reach 89.78%.The reaction mechanisms of bastnaesite and monazite at 650 ℃were analyzed.For bastnaesite,both the outer layer......
(OH)2 and NaOH.Roasting experiments and leaching experiments were carried out to study the decomposition of rare earth minerals.The results indicated that bastnaesite and monazite could be completely decomposed at 650 ℃ and the leaching ratio of rare earths could reach 89.78%.The reaction mechanisms of bastnaesite and monazite at 650 ℃were analyzed.For bastnaesite,both the outer layer......
STUDY ON FLOTATION OF RARE EARTH MINERALS WITH P538 AND ITS MECHANISM周高云,罗家珂摘 要:<正> The properties and collecting ability of a new collector,monoalkyl ester phosphoric acid(P538),for theflotation of rare earth minerals are described in the paper.The mechanism of P538 adsorption on the surfacesof monazite or bastnaesite is explored by modern......
氟碳铈矿精矿的分步氯化-化学气相传输反应 雷鹏翔1,王之昌1,范世华1,王军1,张丽清1 (1.东北大学理学院化学系,沈阳 110006) 摘要:以气态配合物LnAlnCl3n+3(Ln=镧系元素)为载体,研究了从氟碳铈矿精矿中提取分离稀土元素的分步氯化-化学气相传输反应.精矿加热至800K,然后在800~1300K氯化.生成的氯化物在1300K与配体反应生成气态配合物,并化学传输分离6h,CaCl2和BaCl2留在残渣中.研究结果表明,递减温度场和波浪形温度场中的化学传输反应呈现明显不同的特性. 关键词:稀土; 氟碳铈矿精矿; 化学气相传输; 稀土气态配合物; LnAlnCl3n+3......
Study on Roasting Decomposition of Mixed Rare Earth Concentrate in CaO-NaCl-CaCl2 Sun Shuchen1,Bian Xue1,Wu Wenyuan1,Tu Ganfeng1 (1.School of Materials & Metallurgy, Northeastern University, Shenyang 110004, China) Abstract:The decomposed process of bastnaesite, monazite and mixed rare earth concentrate in CaO-CaCl-CaCl2 was studied by means of TG-DTA method. The relationship among......
in this paper. Solvent extraction is the most effective and efficient method to separate Ce(IV) from RE(Ⅲ), usually accompanied with fluorine(F) and phosphor(P) from bastnaesite and monazite etc. By roast or wet-air oxidation, Ce(Ⅲ) of bastnaesite and monazite was oxidized into Ce(IV), and Cyanex923 and [A336][P507] have been investigated to co-extract and recover Ce(IV), F and P from H2SO4 leaching......
in this paper. Solvent extraction is the most effective and efficient method to separate Ce(IV) from RE(Ⅲ), usually accompanied with fluorine(F) and phosphor(P) from bastnaesite and monazite etc. By roast or wet-air oxidation, Ce(Ⅲ) of bastnaesite and monazite was oxidized into Ce(IV), and Cyanex923 and [A336][P507] have been investigated to co-extract and recover Ce(IV), F and P from H2SO4 leaching......
Study on Roasting Decomposition of Mixed Rare Earth Concentrate in CaO-NaCl-CaCl2吴文远,边雪,孙树臣,涂赣峰摘 要:<正>The decomposed process of bastnaesite, monazite and mixed rare earth concentrate in CaO-CaCl-CaCl2 was studied by means of TG-DTA method. The relationship among decomposition ratio, roasting temperature, and CaO-NaCl addition was studied......
Trans. Nonferrous Met. Soc. China 23(2013) 849-854 Kinetics of rare earth leaching from roasted ore of bastnaesite with sulfuric acid Xing-liang FENG1,2, Zhi-qi LONG1,2, Da-li CUI1,2, Liang-shi... of Dechang bastnaesite in Sichuan, China. The effect of particle size, stirring speed, sulfuric acid concentration and leaching temperature on RE extraction efficiency was investigated, and the leaching......