日用化学工业（中英文）2023，Vol.53Issue(3)：253-259,7.DOI:10.3969/j.issn.1001-1803.2023.03.002
Mg2+,Al3+和Fe3+对氟磷灰石表面性质的影响
Effects of Mg2+, Al3+ and Fe3+ on the surface properties of fluorapatite
摘要
Abstract
Phosphate rock flotation is a widely used method in phosphate rock processing in which aimed minerals are selectively separated from gangue minerals based on the difference in surface wettability. Due to its associated minerals in phosphate rock, there is always a lot of Mg2+, Al3+ and Fe3+ in phosphate rock slurry. The existence of metal ions, whose forms are changed with slurry pH, can affect the flotation operation by adsorption on the mineral surface. The surface properties of minerals are the main factors affecting their dispersion, aggregation, and flotation behavior. Herein, the influences of unavoidable metal ions, including Mg2+, Al3+ and Fe3+, on the surface properties of fluorapatite (FAP) in pulp were studied by solution chemical calculation, turbidity, contact angle and Zeta-potential test. The results showed that the forms of metal ions in solution vary with pH. FAP is a hydrophilic mineral, and the influence of adding Fe3+ ions on the wettability of FAP was greatly affected by pH. In acidic environment, Fe3+ ions could promote the hydrophilicity of FAP, while in neutral and alkaline environment, Fe3+ ions could inhibit the hydrophilicity of FAP. The effects of Mg2+ and Al3+ ions were less affected by pH, and both Mg2+ and Al3+ ions inhibited the wettability of FAP in neutral environment. In the range of pH 3-11, Mg2+ mainly existed as divalent ions, which compressed the double layer on the FAP surface. Al3+ and Fe3+ mainly generated hydroxide precipitation through hydrolysis to cover the surface of FAP. Mg2+, Al3+ and Fe3+ ions would destroy the dispersity of FAP and promote the coagulation of FAP.关键词
磷矿/氟磷灰石/润湿性/分散性/金属离子/表面性质Key words
phosphate rock/fluorapatite/wettability/dispersibility/metal ion/surface property分类
化学化工引用本文复制引用
姜春燕,敖先权,曹阳,陈鸿,李松鸿..Mg2+,Al3+和Fe3+对氟磷灰石表面性质的影响[J].日用化学工业（中英文）,2023,53(3):253-259,7.基金项目
国家重点研发计划项目(2018YFE0110300) （2018YFE0110300）
