【摘要】 矿物的电动电位测定和可浮性实验结果表明:十二胺主要以静电力作用吸附在赤铁矿、磁铁矿、石英和绿泥石表面上,但与赤铁矿和绿泥石之间可能存在化学力作用;十二胺对上述矿物的扑收能力的强弱与介质pH值有关,在pH值9—11之间的扑收能力最强;在碱性介质中时矿物可浮性由强至弱的排列顺序为:石英>赤铁矿>磁铁矿>绿泥石;在中性和弱酸性介质中石英的可浮性最好,磁铁矿的可浮性最差;赤铁矿和绿泥石的可浮性居中;通过调整介质pH值和十二胺浓度可能实现石英和磁铁矿的分离。更多还原

【Abstract】 The floatability of hematite, magnetite, quartz and chlorite by dodecylamine were studied by the experiments of flotation and zeta potential measurement. The results show that the adsorption of dodecylamine on the minerals is mainly due to physical action, but perhaps on hematite and chlorite, due to week chemical action simultaneously. The minerals were collected most effectively by dodecylamine between the pH 9—11, and the floatability of quartz by dodecylamine is better than the other minerals. The separation of magnetite and quartz may be attained by regulation of the medium pH and docecylamine concentration in the acidic mediume.更多还原