H205对氟碳铈矿和含钙脉石的浮选机制研究

Flotation Mechanism of H205 on Bastnaesite and Calcareous Gangues

采用单矿物浮选试验、Zeta-电位测量、吸附量测量、FT-IR分析方法,结合浮选溶液化学,研究了氟碳铈矿和含钙脉石在H205(邻羟基萘甲羟肟酸)为捕收剂体系下的浮选机制。当H205浓度为4×10^-4 mol·L^-1时,氟碳铈矿和萤石在pH=7~10范围内有较好的可浮性;Zeta-电位测量、吸附量测量表明H205吸附氟碳铈矿和萤石表面,使电位负移,萤石与H205可能有静电吸附;FT-IR分析表明氟碳铈矿与H205存在化学吸附。结合浮选溶液化学推测了H205在氟碳铈矿和含钙脉石表面作用的模型。

The flotation behavior of bastnaesite and calcareous gangues using H205(o-hydroxynaphthalene methyloxime acid)as the collector,was investigated by pure mineral flotation tests,zeta-potential measurements,adsorption amount of H205 measurements,Fourier transform infrared(FT-IR)analyses and solution chemistry calculation.When the concentration of H205 is 4×10-4 mol·L^-1,bastnaesite and fluorite show good floatability in the pH range of 7~10.The results of zeta-potential and adsorption amount of H205 measurements indicated that H205 adsorbed on bastnaesite and fluorite surface,causing zeta-potential shifted negatively.There may exist electrostatic adsorption between fluorite and H205.The results of FT-IR demonstrated that there is chemical absorption of H205 on bastnaesite surface.Combined with the solution chemistry calculation,the models of H205 acting withbastnaesite and calcareous gangues on their surface were deduced.