Malachite is one of the main minerals used for the industrial enrichment and recovery of copper oxide resources, and copper ions are unavoidable metal ions in the flotation pulp. The microflotation, contact angle, and adsorption experiments indicated that pretreatment with an appropriate concentration of copper ions could improve the malachite recovery, and the addition of excess copper ions reduced the hydrophobicity of the malachite surface. The results of zeta potential tests indicated that sodium sulfide and butyl xanthate were also adsorbed on the surface of malachite pretreated with copper ions. X-ray photoelectron spectroscopy (XPS) results indicated that —Cu—O and —Cu—OH bonds were formed on the surface of the samples. After pretreatment with an appropriate concentration of copper ions, the number of —OH groups on the mineral surface decreased, whereas the number of Cu—S groups on the mineral surface increased, which was conducive to the sulfidization of malachite. After adding a high concentration of copper ions, the —OH groups on the mineral surface increased, whereas the number of Cu—S groups decreased, which had an adverse effect on the sulfidization flotation of malachite. Time-of-flight secondary ion mass spectrometry showed that pretreatment with copper ions resulted in a thicker sulfidization layer on the mineral surface.

孔雀石是工业富集和回收氧化铜资源的主要矿物之一，铜离子是浮选矿浆中不可避免的金属离子。微浮选、接触角和吸附实验表明，适当浓度的铜离子预处理可以提高孔雀石的回收率，而过量铜离子的加入会降低孔雀石表面的疏水性。zeta电位测试结果表明，硫化钠和黄原酸丁酯也吸附在铜离子预处理的孔雀石表面。X射线光电子能谱(XPS)结果表明，样品表面形成了-Cu-O和-Cu-OH键。用适当浓度的铜离子预处理后，矿物表面的-OH基团数量减少，而矿物表面的Cu-S基团数量增加，有利于孔雀石的硫化。添加高浓度铜离子后，矿物表面的-OH基团增加，而Cu-S基团的数量减少，对孔雀石的硫化浮选产生不利影响。飞行时间二次离子质谱表明，用铜离子预处理会在矿物表面产生更厚的硫化层。对孔雀石的硫化浮选产生不利影响。飞行时间二次离子质谱表明，用铜离子预处理会在矿物表面产生更厚的硫化层。对孔雀石的硫化浮选产生不利影响。飞行时间二次离子质谱表明，用铜离子预处理会在矿物表面产生更厚的硫化层。