过氧化氢表面改性强化硫化浮选赤铜矿

Enhanced sulfidization flotation of cuprite by surface modification with hydrogen peroxide

使用过氧化氢作为氧化剂对赤铜矿表面进行改性处理以实现赤铜矿的强化硫化。表面吸附和红外光谱实验结果表明,硫化前使用过氧化氢对赤铜矿表面进行改性可增加黄药在赤铜矿表面的吸附量。Zeta电位、扫描电子显微镜、X射线光电子能谱和飞行时间二次离子质谱实验结果表明,经过氧化氢改性后的赤铜矿表面生成了更多的S^(2-)和S_(n)^(2-)组分。微浮选实验结果表明,经过氧化氢改性后的赤铜矿浮选回收率从61.74%增加到83.30%。微浮选实验与表面测试分析结果证实,过氧化氢对赤铜矿表面的改性处理能增强赤铜矿表面的硫化过程,从而改善赤铜矿的浮选行为。

Hydrogen peroxide was used as an oxidant to modify the cuprite surface and enhance its sulfidization.Surface-adsorption and infrared spectroscopy measurements indicated that the modification of the cuprite surface with hydrogen peroxide before sulfidization increased the adsorption capacity of xanthate.Zeta potential,scanning electron microscopy-energy dispersive X-ray spectroscopy,X-ray photoelectron spectroscopy,and time-of-flight secondary ion mass spectrometry results showed that the modification with hydrogen peroxide increased the contents of S^(2−)and Sn^(2−)species on the cuprite surface.Microflotation tests showed that the recovery of cuprite increased from 61.74%to 83.30%after the modification of the surface with hydrogen peroxide.These results confirm that the modification of the cuprite surface with hydrogen peroxide enhances the sulfidization of cuprite,which in turn improves its flotation.