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中南大学学报(英文版)

Journal of Central South University

Vol. 23    No. 3    March 2016

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Numerical simulation of flocculation and settling behavior ofwhole-tailings particles in deep-cone thickener
RUAN Zhu-en(阮竹恩)1, 2, LI Cui-ping(李翠平)1, 2, SHI Cong(石聪)1, 2

1. School of Civil & Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, China;
2. Key Laboratory of Ministry of Education of China for Efficient Mining and Safety of Metal Mines
(University of Science & Technology Beijing), Beijing 100083, China

Abstract:Rapid dewatering and thickening of whole-tailings with ultrafine particles is one of the most important processes for the whole-tailings paste preparation. Deep-cone thickener, a kind of such process for the flocculation and settling of whole-tailings, is particularly necessary to study. However, there exist many problems in observing the flocculation and settling process of whole-tailings, as well as the particle size distribution (PSD) of whole-tailings floccules in deep-cone thickener. Population balance model (PBM) is applied to predict the PSD in deep-cone thickener, and LUO model and GHADIRI model are employed to study the aggregation and fragmentation mechanism of the whole-tailings particles, respectively. Through three-dimensional numerical simulation on the whole-tailings flocculation and settling in deep-cone thickener using computational fluid dynamics (CFD)-PBM, the distribution of density and turbulent kinetic energy in deep-cone thickener were obtained, at the same time the spatio-temporal changes of whole-tailings floccules particle size distribution are analyzed. Finally, the major flocculation position in deep-cone thickener is found and the flocculation settling rules of whole-tailings are achieved.

 

Key words: whole-tailings particles; flocculation settling; numerical simulation; deep-cone thickener; population balance model

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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