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Gold Science and Technology >

2021 , Vol. 29 >Issue 2: 266 - 274

DOI: https://doi.org/10.11872/j.issn.1005-2518.2021.02.172

Mining Technology and Mine Management

Prediction of Technical Parameters of Full Tailings Thickening Based on Static Settlement Test

  • Qi LIU , 1, 2, 3 ,
  • Youhua CEN 1 ,
  • Dongrui LIU 2, 3 ,
  • Weibing LUO 1 ,
  • Xi XU 1
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  • 1. Daye Nonferrous Metals Co. ，Ltd. ，Huangshi 435000，Hubei，China
  • 2. Changsha Institute of Mining Research Co. ，Ltd. ，Changsha 410083，Hunan，China
  • 3. National Metal Mining Engineering Technology Research Center，Changsha 410012，Hunan，China

Received date: 2020-09-24

  Revised date: 2020-12-30

  Online published: 2021-05-28

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Highlights

At present，most of the researches on the thickening performance of tailings are macro researches，and the focus of the research is to improve the settlement performance parameters of mortar by using certain agents，technical means or methods. However，there is no micro research and no in-depth study on what causes the great difference in the thickening properties between different tailings. At present，there is no systematic study on the influence of density and particle size on solid flux and underflow concentration. This paper tries to analyze the main factors affecting the flocculation thickening effect by doing a large number of static sedimentation tests，and to study the quantitative relationship between the technical parameters of full tailing mortar thickening and the physical properties of tailings. Therefore，the particle size composition and density of the tailings of nine metal mines were measured first，and then the flocculation sedimentation tests of the whole tailings of these nine metal mines were carried out. The optimal pulp dilution concentration，underflow concentration，flocculant type，flocculant dosage and tailings throughput per unit area of the 9 typical mines were obtained. The results show that the underflow concentration of slurry，the change of slurry concentration and the amount of flocculant required for sedimentation test are only related to the particle size of tailings，and have nothing to do with the density of tailings. The coarser the particle size is，the higher the underflow concentration is，and the less flocculant dosage is required for the test. The larger the particle size and density of tailings are，the higher the solid flux is. Furthermore，the mathematical relationship between the factors was fitted by the dimensionless regression analysis method，and the relationship equation between the median particle size of tailings and underflow concentration was obtained，the relationship equation between the control particle size of tailings and the concentration change was obtained，and the relationship equation between the particle size，density，concentration and solid flux was obtained. Comparing the calculation results with the test results，it is found that the difference between the predicted value and the test value is very small，which proves that the derived relationship equation is convenient and feasible，and has a good application value.

Cite this article

Qi LIU , Youhua CEN , Dongrui LIU , Weibing LUO , Xi XU . Prediction of Technical Parameters of Full Tailings Thickening Based on Static Settlement Test[J]. Gold Science and Technology, 2021 , 29(2) : 266 -274 . DOI: 10.11872/j.issn.1005-2518.2021.02.172

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http://www.goldsci.ac.cn/article/2021/1005-2518/1005-2518-2021-29-2-266.shtml

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