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用放射性约为1.7×10~3居里的 Co~(60)作为辐射源,系统地研究了γ-射线对铁矿物和石英浮选性质的影响。研究结果表明,只需经过小剂量辐照(5000拉德以下),就可使赤铁矿、假象赤铁矿和磁铁矿的浮选回收率分别提高10％以上,而石英却不会被活化。从而为强化铁矿浮选过程开辟了一条新途径。通过多方面的研究,认为γ-射线的作用机理是:由于γ-射线对矿物晶格中电子的激发和电离作用,致使表面层中自由电子浓度减小、电子空穴浓度增大、费米能级降低,因而使矿物表面具备了较强的受主性质。当其与阴离子捕收剂相互作用时,就有利于电子从阴离子方面向矿物方面转移,形成比较强的化学吸附键,致使捕收剂的吸附量增大、固着稳定性提高,矿物的可浮性得到改善。
The effect of γ-ray on the flotation properties of iron minerals and quartz was investigated systematically with Co ~ (60) of about 1.7 × 10 ~ 3 Curie. The results show that the flotation recovery of hematite, heliostolite and magnetite can be increased by more than 10% respectively, only with low dose irradiation (below 5000 rad), while quartz is not activation. Which opened up a new way to strengthen the flotation process of iron ore. Through various studies, it is considered that the mechanism of γ-ray is that due to the excitation and ionization of electrons in the crystal lattices by γ-rays, the concentration of free electrons in the surface layer decreases and the electron-hole concentration increases. Fermi Lower energy level, so that the mineral surface has a strong acceptor nature. When it interacts with the anion collector, it will help the electron transfer from the anion to the mineral, forming strong chemical adsorption bond, resulting in the increase of the adsorption amount of the collector, the fixation stability and the floatability of the mineral Sex is improved.