气溶胶化丁基黄药强化黄铁矿浮选回收机理研究

Flotation Mechanism of Pyrite Enhanced by Aerosolized Butyl Xanthate

为分析气溶胶处理丁基黄药对黄铁矿浮选效果的影响规律及其机理,以气溶胶化丁基黄药为捕收剂,进行了黄铁矿单矿物浮选实验,采用电导率、红外光谱及XPS等手段对经气溶胶处理前后的丁基黄药作用的黄铁矿进行表征。结果表明,气溶胶化丁基黄药可显著提高丁基黄药中的有效成分双黄药分子的含量以及黄铁矿的浮选效果,在丁基黄药质量浓度为15 mg/L时,黄铁矿的回收率为57.20%,与未处理相比,黄铁矿回收率提高16.47百分点。气溶胶化处理丁基黄药可以提高溶液中的溶解氧浓度,溶解氧既可促进溶液中双黄药的生成,强化丁基黄药对黄铁矿的捕收效果,又可影响黄铁矿的氧化反应程度,使黄铁矿表面矿物组成发生变化,并且疏水性单质硫的比例增加了7.61百分点,有利于黄铁矿上浮。此外,由于气溶胶化丁基黄药在黄铁矿表面吸附量增大,黄铁矿表面所含疏水基团-C4H9增多,提高了黄铁矿的疏水性。研究结果对气溶胶浮选技术在浮选领域应用有一定的参考意义。

In order to study the influence and mechanism of aerosol treatment of butyl xanthate on the flotation effect of pyrite,the single mineral flotation experiment of pyrite was carried out with aerosolized butyl xanthate as collector.The pyrite treated by butyl xanthate before and after aerosol treatment was characterized by conductivity,infrared spectroscopy and XPS.The results showed that the aerosolized butyl xanthate could significantly increase the content of the active ingredient dixanthogen in butyl xanthate and the flotation effect of pyrite.The recovery of pyrite was 57.20%at the mass concentration of butyl xanthate of 15 mg/L,which could increase the recovery of pyrite by 16.47 percentage points compared with that of untreated.Aerosolization treatment of butyl xanthate can increase the dissolved oxygen concentration in the butyl xanthate solution.Dissolved oxygen not only promote,the formation of dixanthogen in the solution,but also enhanced the collection effect of butyl xanthate on pyrite.It also affected the degree of oxidation reaction of pyrite,and the proportion of hydrophobic elemental sulfur increased 7.61%,which was beneficial to improve the floatability of pyrite.In addition,due to the increase of the adsorption amount of aerosolized butyl xanthate on the surface of pyrite,the hydrophobic group-C4H9 on the surface of pyrite increased,which improved the hydrophobicity of pyrite.The research provides a reference for aerosol flotation technology in the field of flotation.