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Gold Science and Technology ›› 2018, Vol. 26 ›› Issue (1): 64-73.doi: 10.11872/j.issn.1005-2518.2018.01.064

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Research on the Change Law of Volume Fraction of Tailings with Tailings Silo Height in Vertical Tailings Silo

REN Weicheng 1，2，QIAO Dengpan 3，ZHOU Zhiwei 4   

  1. 1.School of Mining Engineering，North China University of Science and Technology，Tangshan 063009，Hebei，China； 2. Key Laboratory of Mining and Safety Technology of Hebei Province，North China University of Science andTechnology，Tangshan 063009，Hebei，China； 3. Faculty of Land Resource Engineering，Kunming University of Science and Technology，Kunming 650093，Yunnan，China； 4.Anshan Chentaigou Iron Mining，China Minmetals Corporation，Anshan 114044，Liaoning，China
  • Received:2017-07-31 Revised:2017-10-31 Online:2018-02-28 Published:2018-05-19

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Abstract:

There were many problems in the existing ore drawing system，such as large sand concentration fluctuation，low concentration of actual ore drawing and instability，so a new discharge sand model was proposed ，which was different from tranditional discharge sand working mode of vertical sand silo.That was，by controlling three conditions of feed flow and concentration，discharge flow and height of tailings stacking surface，to carry out feed，overflow and discharge sand at the same time. And fluent software was used to simulate continuous discharge tailings model. The results showed that，different height of the accumulation corresponding to discharge tailings concentration at the bottom of the silo is different can be obtained as feeding，overflow and discharging keeping stability and achieving a dynamic balance. The relationship of tailings volume fraction changes with regularly silo height.Prediction model of the volume fraction of tailings changes with silo height is proposed. Industrial test of continuous tailings discharge systems is carried out in Dahongshan copper mine Yuxi Yunnan.The results showed that the industrial test displays successfully which validate the efficacy of the continuous tailings discharge model.

Key words: tailings, dynamic sedimentation, vertical tailings silo, consecutive discharge tailings, numerical simulation, feeding, underflow, accumulation height

CLC Number: 

  • TD325

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