Effect of Stirring on Oil-Water Separation in Rare Earth Mixer-Settler  

作　　者：Wang Shuchan Zhang Ting'an Zhang Zimu Lü Chao Zhao Qiuyue Liu Yan 

机构地区：[1]School of Materials and Metallurgy of Northeastern University, Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Education Ministry

出　　处：《China Petroleum Processing & Petrochemical Technology》2014年第3期99-103,共5页中国炼油与石油化工（英文版）

基　　金：financially supported by the National 863 Plan (2010AA03A405, and 2012AA062303);the National 973 Plan (2012CBA01205);the National Natural Science Foundation of China (U1202274, 51204040);the National Science and Technology Support Program (2012BAE01B02);Fundamental Research Funds for the Central Universities (N130702001 and N130607001)

摘　　要：Oil-water separation is critical to solvent extraction process of rare earth, which can directly affect the yield and quality of the product. The experiments measure the two-phase separation time in a beaker, mixing uniformity of two phases in the mixer and the oil phase entrainment at oil exit by the Karl Fischer method and numerical simulation for the mixersettler to study the combined effect of gravity and stirring. Experimental results show that relative to the static situation, the separation efficiency resulted from low-speed stirring is increased by 25%. The water content in the oil is a minimum at an offset distance L of 10 cm and the clearance off the tank bottom z of 10 cm is as low as 0.49%. Distribution images of oilwater separation at 2 s indicates that stirring is very conducive to the separation of the oil-water phase.Oil-water separation is critical to solvent extraction process of rare earth, which can directly affect the yield andquality of the product. The experiments measure the two-phase separation time in a beaker, mixing uniformity of two phasesin the mixer and the oil phase entrainment at oil exit by the Karl Fischer method and numerical simulation for the mixersettlerto study the combined effect of gravity and stirring. Experimental results show that relative to the static situation, theseparation efficiency resulted from low-speed stirring is increased by 25%. The water content in the oil is a minimum at anoffset distance L of 10 cm and the clearance off the tank bottom z of 10 cm is as low as 0.49%. Distribution images of oilwaterseparation at 2 s indicates that stirring is very conducive to the separation of the oil-water phase.

关 键 词：oil-water separation water content STIRRING mixer-settler. 

分 类 号：TE624.1[石油与天然气工程—油气加工工程]