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采用十八胺—煤油混合捕收剂,对晶质及沉积磷灰石和白云石的浮选行为进行了研究。对于单矿物的浮选,白云石比磷灰石易浮。当白云石与磷灰石混合,并在高的矿浆浓度下进行调整后,磷灰石的可浮性优于白云石。因此,矿浆浓度对于选择性地浮选分离起着重要的作用。品质与沉积矿物的行为类似,只是晶质矿物比沉积矿物具有较小的表面积从而消耗较少的捕收剂。当加入酸或碱时,两种矿物都向各自的平衡pH值靠近。矿浆的pH值对它们浮选行为的影响不敏感。电泳淌度的测定表明胺离子在这些矿物上吸附的静电模型不能完全解释上述的浮选行为。
The octadecylamine-kerosene mixed collector was used to study the flotation behavior of crystalline and apatite and dolomite. For single-mineral flotation, dolomite floats more than apatite. When dolomite is mixed with apatite and adjusted at high slurry concentrations, apatite is superior to dolomite for its floatability. Therefore, the pulp concentration plays an important role in the selective flotation separation. The quality is similar to that of sedimentary minerals, except that the crystalline minerals consume less collector than the sedimentary minerals because they have a smaller surface area. When adding an acid or a base, both minerals approach their respective equilibrium pH values. The pH of pulp is insensitive to their flotation behavior. Electrophoretic mobility measurements showed that electrostatic adsorption of amine ions on these minerals did not fully explain the flotation behavior described above.