Abstract: The effects of flow ratio on the continuous phase separation of a liquid-liquid system, composed of 2-ethylhexyl-phosphoric acid mono-2-ethylhexyl ester-kerosene/rare earth chlorides solution, have been studied in a mixer-settler, having a total volume of 0.01m3 and equipped with double mixers in each stage. Separation is conducted under three different settling environments in the settler i. e. gravity field, enhanced settling baffles and low-voltage electricfield, and with two kinds of dispersion and five flow ratioes of the organic phase to aqueous phase (Qo/Qa) from 3:1 to 1:3. The volume of dispersion band in the settler and the values of entrainment of the two phases are being measured. The results show that: (1) Under the action of gravity field or the enhanced settling baffles, the effects of flow ratio on the phase separation of the two kinds of dispersion may be characterized by the volume of dispersion band in the settler and the values of entrainment of the two phases; (2) Under the action of gravity field, a more ideal but different flow ratio occurs in the phase separation of both kinds of dispersion, i. e. water-in-oil and oil-in-water, corresponding to a lower volume of dispersion band and a lower values of entrainment of the two phases respectively; (3)Under the action of enhanced settling baffles, there exists a more ideal but different flow ratio in the phase separation of the two kinds of dispersion mentioned above, correspoding to the best effects of decreasing the volume of dispersion band and the values of entrainment of the two phases respectively; and(4)Under the action of lowvoltage electric field, the volume of dispersion bands decreases tremenduously at all flow ratioes tested for the phase separation of water-in-oil dispersion, moreover, the more ideal flow ratio corresponding to the best effects of decreasing the volume of dispersion band and the values of aqueous phase entrained tended to be identical. The authors suggest that the effects of phase separation should be fully attened to when a suitable flow ratio is selected and the volume of dispersion band and values of entrainment of the two phases should be thoroughly examined and balanced when the effects of phase separation are considered.

摘要： 在总容积10升的双混合室混合澄清器内,以异辛基磷酸单异辛酯-煤油/稀土金属氯化物水溶液作无传质体系,在重力场、助澄清挡板或低压电场等三种不同澄清环境下,用五个不同流比,对两种类型液—液混合相连续分相影响进行了研究.实验结果表明:在重力场或助澄清挡板作用下,流比对两类混合相分相的影响可用分散带容积及两相夹带值表征;在重力场作用下,“油包水”及“水包油”两类混合相的分相都存在对应于分散带容积较少及两相夹带值较低的不同流比;在助澄清挡板作用下,两类混合相的分相也都存在对应于减少分散带容积和降低两相夹带值效果最好的不同流比;在低压电场作用下,对于油包水型混合相的分相分散带容积减少及降低水相被夹带效果与较理想流比是一致的.