(中南大學(xué)資源加工與生物工程學(xué)院，長沙 410083)
摘 要: 基于螢石的晶體(表面)結(jié)構(gòu)，研究并總結(jié)表面斷裂鍵性質(zhì)、解理及暴露面性質(zhì)、表面(自由)能、潤濕性、表面電性、吸附性等螢石表面物理化學(xué)性質(zhì)的各向異性，討論螢石晶體結(jié)構(gòu)特征與表面性質(zhì)之間的關(guān)系，分析不同表面性質(zhì)之間的關(guān)聯(lián)。結(jié)果表明：表面斷裂鍵密度和表面能存在正相關(guān)性，表面斷裂鍵密度可準(zhǔn)確預(yù)測(cè)螢石的解理和暴露面性質(zhì)，表面離子層結(jié)構(gòu)差異、表面Ca質(zhì)點(diǎn)及其斷裂鍵差異可解釋表面電性、潤濕性、溶解性及吸附性的各向異性。
關(guān)鍵字: 螢石；表面能；表面斷裂鍵；各向異性；浮選
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The research progress on anisotropic surface physicochemical properties of fluorite, including surface broken bonds, cleavage nature, surface (free) energy, surface charge, wettability and adsorption behavior, was reviewed in this work based on the crystal (surface) structure of fluorite. The relationships between crystal structure and surface properties were discussed, and the correlations among these surface properties were discussed. The results show that the positive relation between surface broken bonds density and surface energy of fluorite is found, and the former can be used to predict the cleavage nature and the commonly exposed surfaces. The surface Ca distribution feature and its broken (or unsaturated) bonds number can be used to explain the anisotropic surface charging properties, wettability, dissolution and adsorption behavior of fluorite.
Key words: fluorite; surface energy; surface broken bonds; anisotropy; flotation
