硫化铜矿流体包裹体组分释放及其在矿物表面吸附的机理

It has been confirmed that the copper ion concentration achieved by the dissolved balance theory calculation and the surface oxidation and dissolution test of copper sulfide mineral is less than one percent of actual copper ion concentration in copper sulfide mineral pulp. This doesn't show as public believed that the surface oxidation and surface dissolution of copper sulfide mineral is main origin of "hard to avoid" copper ions of the pulp.So the idea is now proposed based on earth chemistry that release of the components of the fluid inclusion in copper sulfide mineral by crushing and grinding mineral is main origin of "hard to avoid" copper ions in the pulp.The shape, size, distribution and abundance of the fluid inclusion in copper sulfide mineral will be studied by XRD, IRM, SEM and EDS.The fluid inclusion components will be released to the pulp by MM400 single ball mill breaking mineral and fracturing fluid inclusion. The fluid inclusion components of the pulp will be investigated by ultrasonic washing, deionized water collecting, ICP-MS and ICS detecting.It will be proved through the comparison of the test results that the component release in the fluid inclusion of copper sulfide mineral is the main source of the "hard to avoid" copper ions of the pulp.The essence and mechanism of copper ion adsorption on the surface of copper sulfide mineral will be investigated through the CASTEP and DMo13 computation of the mineral surface relaxation and the surface potential and ICP-MS detection. The internal rules of the release of the fluid inclusion components and its effect on the surface adsorption of the mineral will be revealed.

硫化铜矿物溶解平衡理论计算、表面氧化和溶解试验得到的铜离子浓度，都不足实际硫化铜矿矿浆中铜离子初始浓度的百分之一。这说明并非公认的那样，表面氧化与溶解是矿浆中"难免"铜离子的主要来源。因此本项目以地球化学为依据，提出硫化铜矿物晶体内部数亿年前遗留的流体包裹体经磨矿而破裂，包裹体组分在矿浆中释放是"难免"铜离子主要来源的学术观点，并采用XRD、IRM、SEM、EDS检测研究硫化铜矿物流体包裹体的形状、尺寸、分布及丰度；通过压碎矿物，破裂流体包裹体，释放包裹体组分，采用超声波去离子水洗涤、ICP-MS和ICS检测溶液中的流体包裹体组分浓度。对试验检测结果进行对比分析，证明流体包裹体释放是"难免"铜离子的主要来源。通过CASTEP和DMo13模拟计算、实时动态表面电位测定，结合溶液组分浓度变化，研究硫化铜矿表面弛豫及铜离子在表面吸附的动力学规律，揭示流体包裹体组分影响矿浆组成及在表面吸附的机理。

硫化铜矿物溶解平衡理论计算、表面氧化和溶解试验得到的铜离子浓度，都不足实际硫化铜矿矿浆中铜离子初始浓度的百分之一。这说明并非公认的那样，表面氧化与溶解是矿浆中“难免”铜离子的主要来源。本项目以地球化学为依据，研究证实了硫化铜矿物晶体内部数亿年前遗留的流体包裹体经磨矿而破裂释放进而影响浮选溶液性质。就此提出了流体包裹体组分在矿浆中释放是“难免”铜离子优势来源的学术观点，并采用XRD、SEM、EDS等手段检测研究了硫化铜矿物流体包裹体的形状、尺寸、分布及丰度。通过压碎矿物破裂和释放流体包裹体，并采用超声波去离子水洗涤和ICP-MS等方法分析了溶液中的流体包裹体组分浓度。对检测结果进行了对比分析，证实了流体包裹体释放是“难免”铜离子的主要来源的结论。通过DFT模拟计算和实时动态表面电位测定，结合溶液组分浓度变化，研究了硫化铜矿表面弛豫及铜离子在表面吸附规律，揭示了流体包裹体组分对矿浆组成的影响及其在弛豫表面的吸附和活化机制。硫化铜矿流体包裹组分释放对矿浆离子的组成具有重要贡献，影响浮选表面和界面作用及浮选效果，因此今后浮选溶液化学等研究应考虑到流体包裹体组分的影响。由此，项目组提出了流体包裹体浮选效应的新思想，这是浮选理论研究的新进展，具有重要科学意义。