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萃取混合槽的设计和优化是影响稀土萃取效率的关键因素之一。通过试验与数值模拟对半开式弯叶圆盘式搅拌桨(半开式BWY)、半开式直叶圆盘式搅拌桨(半开式BPY)、闭式弯叶圆盘式搅拌桨(闭式BWY)和闭式直叶圆盘式搅拌桨(闭式BPY)在混合槽中的搅拌性能进行了研究，考察了4种桨型在不同转速下搅拌产生的负压、功率、排量和流场分布。并以闭式BPY为例，对桨叶直径、宽度和弧长，以及圆环内孔直径、混合槽抽吸口直径和桨叶离抽吸口高度6个参数进行了详细的因素分析，建立了搅拌产生的负压、功率准数、湍动能耗散率和排量准数的关联式。研究结果表明：在相同功率条件下，减小桨叶直径和宽度、圆环内孔直径、混合槽抽吸口直径、桨叶离抽吸口高度，增加桨叶弧长，搅拌抽吸能力更强，但桨叶的排量降低。
Abstract：The design and optimization of extraction mixing tank is one of the key factors affecting the extraction efficiency of rare earth. The mixing performance of semi-open curved-blade disc-type stirring impeller(semi-open BWY),semi-open straight-blade disc-type stirring impeller(semi-open BPY),closed curved-blade disc-type stirring impeller(closed BWY) and closed straight-blade disc-type stirring impeller(closed BPY) paddle in the mixing tank was studied by experiment and numerical simulation. The negative pressure, power, discharge flow rate and flow field distribution generated by the four types of impellers at different rotational speeds were investigated.Taking closed BPY as an example, the six parameters of blade diameter, blade width, blade arc length, inner ring diameter, suction port diameter of the mixing tank, and the height between the blade and the suction port were analyzed in detail.The correlation equations of negative pressure, power number, turbulent kinetic energy dissipation rate and displacement number were established.The results show that under the same power conditions, reducing the blade diameter, inner ring diameter, suction port diameter, height between the blade and the suction port and blade width, as well as increasing the blade arc length, can enhance the mixing suction capacity, but it can reduce the blade displacement.
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基本信息:
DOI：10.13355/j.cnki.sfyj.2025.03.016
中图分类号:TF845
引用信息:
[1]叶志才,谢明辉,向家伟等.不同构型搅拌桨稀土萃取混合槽的性能研究[J].湿法冶金,2025,44(03):412-423.DOI:10.13355/j.cnki.sfyj.2025.03.016.
基金信息:
国家自然科学基金资助项目(22078325,22478397)