Kinetic of Dissolved Phosphorus from Calcination Products of Mixed Rare Earth Minerals
The products of mixed rare earth minerals containing monazite and bastnaesite calcined by CaO-NaCl-CaCl <,2> contained calcium phosphate and phosphorite. In this paper, HCl-H<,3>cit solution was used to wash the calcination products, and the kinetic character of dissolved phosphorus was studied. The results showed that the reaction rate control changed from chemical reaction control mode to mixed control mode and diffusion control mode with increasing temperature, and the activation energy were 7.36, 27.64 and 61.27kJ·mol<-1>, respectively. The change of temperature, the reagent concentration and stirring speed were studied in order to increase the dissolution rate of phosphorus. Phosphorus and rare earth in the calcination products could be separated in this process applicable to the rare earth recovery in phosphorite containing the rare earth.
mixed rare earth minerals HCl-H<,3>cit phosphorus removal kinetics rare earths
Bian Xue(边雪) Wu Wenyuan(吴文远) Yang Mei(杨眉) Sun Shuchen(孙树臣) Tu Ganfeng(涂赣峰)
School of Materials & Metallurgy, Northeastern University, Shenyang 110004, China School of Materials & Metallurgy, Northeastern University, Shenyang 110004,China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
120-124
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）