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选取贵州两个典型磷矿区中具有代表性的海相沉积型磷矿石中的白云石纯矿物,对其进行晶体化学特性研究,从而为有效分选白云石和胶磷矿的浮选工艺提供理论指导。采用化学分析和X射线衍射分析分别对两种白云石纯矿物进行测试,并应用价键理论对白云石矿物结构中的化学键特征进行计算,在此基础上对白云石矿物解离后表面特性及可浮性进行了推测,结果表明:白云石矿物解离后表面必定暴露大量的Ca2+、Mg2+离子,而C4+暴露较少,在水溶液中零电点相对较高,负电性相对较弱,表面存在大量的金属阳离子,表明其在阴离子捕收剂浮选体系中可浮性较好,当溶液酸性减弱、碱性增强时,白云石表面带负电,此时用阳离子捕收剂浮选时可浮性较好。
The dolomite pure minerals in the marine sedimentary phosphate rock from two typical phosphate rock areas in Guizhou Province were selected to study their crystal chemical properties so as to provide the flotation process for the effective separation of dolomite and phosite Theoretical guidance. Two kinds of dolomite pure minerals were tested respectively by chemical analysis and X-ray diffraction analysis, and the bond-bonding theory was used to calculate the chemical bond characteristics in the dolomite mineral structure. On the basis of this, the surface properties of the dolomite minerals after dissociation and The results show that the surface of dolomite minerals must be exposed a large amount of Ca2 + and Mg2 + ions after dissociation, while C4 + is less exposed. The zero point is relatively high and the electronegativity is relatively weak in the aqueous solution. A large number of metal cations, indicating that the anionic collector flotation system flotability is better, when the solution is weaker acidic, basic enhanced dolomite surface with a negative charge, this time with a cationic collector flotation can float Sex is better.