应用基团电负性理论分析丙三醇黄原酸钠抑制毒砂作用机理

Analysis of suppression mechanism of arsenopyrite by glycerol sodium xanthogenate using group electronegativity theory

通过Zeta的测定和基团电负性理论探讨丙三醇黄原酸钠抑制毒砂浮选的作用机理。研究结果表明：丙三醇黄原酸钠由于有亲固基团—OCSS（H）和多个亲水基团—OH,是一种阴离子有机抑制剂,亲固基团—OCSS（H）均易变成阴离子吸附于毒砂表面,亲水基团—OH与水作用形成氢键,能牢固吸附在硫化矿表面,形成一层亲水薄膜,有效阻止捕收剂在矿物表面的吸附;当pH=3~12时,对毒砂有强烈抑制作用。毒砂的浮选回收率小于30%。

Based on detection of Zeta potential and group electronegativity theory,the suppression theory of arsenopyrite flotation by glycerol sodium xanthogenate was discussed.The results show that glycerol sodium xanthogenate has solid affinity group（—OCSS（H）） and many hydrophilic groups of —OH,which is used as anion organic depressant.The solid affinity group（—OCSS（H）） is easy to be absorbed on the surface of arsenopyrite while the hydrophilic group of —OH can form hydrogen bond with water,which leads to absorption of glycerol sodium xanthogenate on the surface of sulfide ore and forms hydrophilic film,and hinder the absorption of collector on the ore surface effectively.Especially at pH=3-12,it can suppress arsenopyrite flotation significantly.The flotation recovery is less than 30%.