伴生萤石矿浮选体系中矿物界面离子沉积行为与调控机制研究

矿物间界面性质难以有效调控导致矿物浮选过程中药剂作用选择性差，是制约伴生萤石矿资源高效利用的主要技术瓶颈。本项目针对伴生萤石浮选体系中主要矿物的性质特点，提出了矿物界面离子沉积行为与调控机制研究。采用PHREEQC软件模拟、溶液组分分析、晶体结构与表面性质检测，系统地研究矿物固-液界面离子迁移与沉淀的发生机制、矿物固-液界面离子沉积规律、多元矿物体系中离子沉积行为的调控机制、矿物固-液界面离子沉积行为与润湿性调控的关联机制。在以上研究基础上，明晰离子沉积-浮选剂作用-矿物表面润湿性调控三方面的耦合关系，采用合理措施强化离子选择性沉积，初步形成基于矿物界面离子选择性沉积实现矿物界面性质可控调节的原则与理论。本项目研究结果将为形成伴生萤石矿浮选分离新技术奠定理论基础，对提高我国复杂难处理的微溶性盐类矿物资源的利用水平提供借鉴，具有重要的理论意义与应用前景。

Ineffective regulation of mineral interfacial property leads to flotation reagent non-selectivity. This is the technical bottleneck in the high efficient utilization of fluorite resources. According to the properties of domain minerals in associated fluorite flotation, research of interface ion deposition behavior and regulatory mechanism would be proposed. The occurrence mechanism of ions migration and precipitation on mineral solid-liquid surface, the basic laws of ion deposition on solid-liquid surface, the regulatory mechanism of ion deposition behavior in multiple minerals system, the correlative mechanism between ion deposition behavior and wettability regulation are studied in this research, using PHREEQC software simulation, solution proximate analysis and crystal structure and surface inspection. Based on these, the coupling relationship among ion deposition, flotation agent and mineral surface wettability could be cleared. Ion selective deposition could be strengthened with rational methods. The controllable regulation theory of mineral interfacial property based on ion selective deposition could be formed. The results can provide theoretical basis for the new technique formation of associated fluorite flotation separation, and provide guidance for improving resources utilization of complex intractable micro-soluble mineral resources. It has great theoretical significance and application prospects.