铜的离子浮选和溶剂浮选

Ion Flotation and Solvent Sublation of Cupric Ion

以浮选过程中存在各种离子平衡为基础,从理论上推算出浮选Cu^(2+)稀溶液的最佳pH范围,并为浮选实验所证实。将C_(12)H_(25)SO_4Na(NaLS)与Cu(LS)_2作为理想的表面活性剂混合物,通过表面张力测定,算得离子对平衡常数K与Cu(LS)_2的表面过剩摩尔分数X_(Cu(?)LS_z)~3的值分别为1.77×10~3与0.917。在pH=5.6条件下,以铜萃取剂加在溶剂中的溶剂浮选,比离子浮选和溶剂萃取具有更佳的分离效率,其效率可达91.6%。

Based on various ionic equilibrium during ion flotation, the best ranges of pH values were estimated while flotating 10^(-3)mol/L Cu^(2^) solution with C_(12)H_(25)OSO_3Na(NaLS), and they were confirmed by flotation experiments. Used. NaLS and Cu(LS)_2 as ideal surfactant mixture, the ion pairs equilibrium constant K, surface excess mole fraction X_((Cu L3)~S)_2 were calculated by the surface tension measurement, the K and X_((Cu LS)~S)_2 were found to be1.77×10~3 and 0.917 respectively. The solvent sublation with a Cu^(2+) extractant at pH=5.6 has a more better separation efficiedcy (about 91.6%) than ion flotation and solvent extraction.