含金废液脱氰过程固—液搅拌的数值模拟

doi:10.11872/j.issn.1005-2518.2016.05.108

Abstract

Abstract:

In order to improve the decyanation stirring effect of gold-containing wastewater in the stirred tank，a numerical simulation of the flow field and the solid-liquid dispersion was carried out.Multiple reference frame method and Euler- Euler model are used in the simulation experiment.The effects of rotational speed，eccentricity on the velocity field，flow pattern，solid holdup distribution and mixing power in the decyanation process were investigated.The results show that the eccentric mixing can significantly improve the symmetric velocity field and flow pattern，and the flow field is the best when the eccentricity is e=0.2.The near wall lateral flow is enhanced when eccentricity is greater than 0.2，the near-wall circular vortex close to blade area.There is a large circular vortex with weak turbulence in far-wall area，which is not conducive to mixing.Eccentricity is conducive to the dispersion of decyanation agent in the 0~0.2 range.But a large degree of eccentricity will cause the accumulation of cyanide in the near wall side baffle plate.Agitation speed increased from 100 r/min to 1 200 r/min，the power growth rate is more and more fast.The power of two phase mixing is 8.8% higher than that of single phase stirring.Eccentric agitation has the energy saving effect，when the eccentricity increases from 0 to 0.43，the stirring power is reduced by 3.9%.

Key words: gold-containing wastewater, decyanation；stirred tank, eccentric agitation, numerical simulation

CLC Number:

TF831

SHENG Yong，LIU Tingyao，HAN Lihui，LIU Qing. Numerical Simulation of Solid-Liquid Mixing in Stirred Tank During Decyanation Process of Gold-Containing Wastewater[J].Gold Science and Technology, 2016, 24(5): 108-114.

References

［1］宾万达.贵金属冶金学［M］.长沙：中南大学出版社，2011.
［2］孙玉刚，陈光辉.含氰废水处理方法的研究［J］.黄金科学技术，2011，19（1）：74-76.
［3］王凯，冯连芳.混合设备设计［M］.北京：机械工业出版社，2000.
［4］ Tamburini A，Cipollina A，Micale G，et al.CFD simulations of dense solid-liquid suspensions in baffled stirred tanks：Prediction of suspension curves［J］.Chemical Engineering Journal，2011，178（1）：324-341.
［5］胡银玉，刘喆，杨基础，等.偏心搅拌反应器内的液相混合行为［J］.化工学报，2010，61（10）：2517-2522.
［6］ Martina M，Loukia N，Kalok C L，et al.Particle concentration and mixing characteristics of moderate-to-dense solid-liquid suspensions［J］.Industrial and Engineering Chemistry Research，2003，42（24）：6236-6249.
［7］ Alvarez M M，Arratia P E，Muzzio F J.Laminar mixing in eccentric stirred tank systems［J］.Canadian Journal of Che-mical Engineering，2002，80（4）：546-557.
［8］ Hall J F，Barigou M，Simmons M J H，et al.Comparative study of different mixing strategies in small high throughput experimention reactors［J］.Chemical Engineering Science，2005，60（8/9）：2355-2368.
［9］周国忠.搅拌槽内流动与混合过程的实验研究及数值模拟［D］.北京：北京化工大学，2002.
［10］严宏志，李新明，吴波，等.卧式双轴搅拌槽的液固两相流数值分析［J］.中南大学学报（自然科学版），2013，44（2）：532-539.
［11］ Jafari R，Tanguy P A，Chaouki J.Experimental investigation on solid dispersion，power consumption and scale-up in moderate to dense solid-liquid suspensions［J］.Chemical Engineering Research and Design，2012，90（2）：201-212.
［12］ Jahoda M，Mostek M，Kukukova A，et al.CFD Modelling of liquid homogenization in stirred tanks with one and two impellers using large eddy simulation［J］.Chemical Engineering Research and Design，2007，85（5）：616-625.
［13］刘庭耀，章鹏程，李剑锋，等.贵金属脱氰过程的搅拌釜流场数值模拟［J］.材料与冶金学报，2015，14（1）：29-35.
［14］刘燕，张延安，杜靖尧，等.流体中气泡微细化与分散过程的数值模拟［J］.过程工程学报，2009（增）：400-404.
［15］ Liu Y，Zhang T A，Masamichi S，et al.Mechanical stirring for highly efficient gas injection refining［J］.Transactions of Nonferrous Metals Society of China，2011，21（8）：1896-1904.
［16］ Zwietering T N.Suspending of solid particles in liquid by agitators［J］.Chemical Engineering Science，1958，8（3/4）：244-253.
［17］ Wu H，Patterson G K.Laser-Doppler measurements of turbulent-flow parameters in a stirred mixer［J］.Chemical Engineering Science，1989，44（10）：2207-2221.
［18］ Wen C Y，Yu Y H.Mechanics of Fluidization［J］.Chemical Engineering Progress Symposium Series，1966，62：100-111.
［19］ Wadnerkar D，Utikar R P，Tade M O，et al.CFD simulation of solid-liquid stirred tanks［J］.Advanced Powder Technology，2012，23（4）：445-453.

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Numerical Simulation of Solid-Liquid Mixing in Stirred Tank During Decyanation Process of Gold-Containing Wastewater

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