Optimal Calculation Mode of Vertical Sand Silo Area Based on Flocculating Sedimentation

doi:10.12068/j.issn.1005-3026.2016.10.028

Abstract

Abstract: In order to explore the optimal calculation mode of vertical sand silo area under the condition of flocculating sedimentation of unclassified tailings， the minimized result error was determined through 3 calculation modes based on the ideal sedimentary condition and the different sedimentary characteristics. Took the case of a lead and zinc ore as an example: the flocculating sedimentation tests of fine unclassified tailings were conducted， then the slurry settlement curves under the best settling condition were obtained by regression analysis. The reliability of calculation modes for vertical sand silo area was analyzed. Results showed that the best flocculent condition is as follows: the relative molecular weight of APAM is 8×10⁶， the volume fraction of feeding slurry is 7.80% and the appropriate unit consumption of flocculants is 17.66g·t^-1. The optimal area of vertical sand silo is 36.06m²， which is 97.04% close to the result based on the Talmage-Ficth graphical method.

Key words: unclassified tailings, flocculating sedimentation, vertical sand silo area, regression analysis, calculation mode

CLC Number:

TD926.4

WANG Shi， ZHANG Qin-li， WANG Xin-min， LI Shuai. Optimal Calculation Mode of Vertical Sand Silo Area Based on Flocculating Sedimentation[J]. Journal of Northeastern University Natural Science, 2016, 37(10): 1501-1506.

References

[1]Bouzalakos S，Dudeney A W L，Chan B K C.Formulating and optimizing the compressive strength of controlled low-strength materials containing mine tailings by mixture design and response surface methods［J］.Minerals Engineering，2013，53:48-56.
[2]Lorenzo F，Angiolo F，Fabio R.Flow of a Bingham-like fluid in a finite channel of varying width:a two-scale approach［J］.Journal of Non-Newtonian Fluid Mechanics，2012，177/178(4):76-88.
[3]Wang Y，Gao B，Yue Q，et al.Effect of viscosity，basicity and organic content of composite flocculant on the decolorization performance and mechanism for reactive dyeing wastewater［J］.Journal of Environmental Sciences，2011，23(10):1626-1633.
[4]费祥俊.浆体与粒状物料输送水力学［M］.北京:清华大学出版社，1994:105-114.(Fei Xiang-jun.Hydraulics of transporting slurry and granular material［M］.Beijing:Tsinghua University Press，1994:105-114.)
[5]Eswaraiah C，Biswal S K，Mishra B K.Settling characteristics of ultrafine iron ore slimes［J］.International Journal of Minerals，Metallurgy，and Materials，2012，19(2):95-99.
[6]王洪江，陈琴瑞，吴爱祥，等.全尾砂浓密特性研究及其在浓密机设计中的应用［J］.北京科技大学学报，2011，33(6):676-681.(Wang Hong-jiang，Chen Qin-rui，Wu Ai-xiang，et al.Study on thickening properties of unclassified tailings and its application to thickener design［J］. Journal of University of Science and Technology Beijing，2011，33(6):676-681.)
[7]Kynch G J.A theory of sedimentation［J］.Transactions of the Faraday Society，1952，48:166-176.
[8]Talmage W P，Fitch E B.Determining thickener unit areas［J］.Industrial & Engineering Chemistry，1955，47(1):38-41.
[9]Jung J，Jang J.Soil-water characteristic curve of sediments containing a polyacrylamide solution［J］.Géotechnique Letters，2016，6(1):89-94.
[10]Sadeghi S H，Hazbavi Z，Younesi H，et al.Trade-off between runoff and sediments from treated erosion plots and polyacrylamide and acrylamide residues［J］.Catena，2016，142:213-220.
[11]Swift T，Swanson L，Bretherick A，et al.Measuring poly (acrylamide) flocculants in fresh water using inter-polymer complex formation［J］.Environmental Science:Water Research & Technology，2015，1(3):332-340.
[12]何丽莉，徐新阳.煤矸石酸溶法制得聚合氯化铝铁钙的形态［J］.东北大学学报(自然科学版)，2013，34(10):1477-1480，1484.(He Li-li，Xu Xin-yang.Morphology of PAFCC prepared by coal gangue leaching method［J］.Journal of Northeastern University(Natural Science)，2013，34(10):1477-1480，1484.)(上接第1500页)
[4]杨根兰，黄润秋，蔡国军，等.岩石破坏前后曲线分类及脆—延转换围压研究——蚀变岩常规三轴压缩试验［J］.岩土力学，2008，29(10):2759-2764.(Yang Gen-lan，Huang Run-qiu，Cai Guo-jun，et al.Conventional triaxial compression test of altered rock—study of classification of strain-stress curve before and after destruction and brittle-ductile diversion confining pressure ［J］.Rock and Soil Mechanics，2008，29(10):2759-2764.)
[5]Yagiz S.Assessment of brittleness using rock strength and density with punch penetration test［J］.Tunneling and Underground Space Technology，2009，24(1):66-74.
[6]Hucka V，Das B.Brittleness determination of rocks by different methods［J］.International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1974，11(10):389-392.
[7]Altindag R.The correlation of specific energy with rock brittleness concept on rock cutting［J］.Journal of the South African Institute of Mining and Metallurgy，2003，103(3):163-171.
[8]Morley A.Strength of materials［M］.London:Longman Green，1944:71-72.
[9]Heteny M.Handbook of experimental stress analysis［M］.New York:John Wiley，1966:23-25.
[10]Ramsay J G.Folding and fracturing of rocks［M］.London:McGraw-Hill，1967:44-47.
[11]Obert L，Duvall W I.Rock mechanics and the design of structures in rock［M］.New York:John Wiley，1967:78-82.
[12]尤明庆.岩石力学的性质［M］.北京:地质出版社，2007:113-114.(You Ming-qing.Mechanical properties of rock ［M］.Beijing:Geology Publishing House，2007:113-114.)
[13]赵兴东，唐春安，李元辉，等.花岗岩破裂全过程的声发射特性研究［J］.岩石力学与工程学报，2005，25(sup2):3673-3678.(Zhao Xing-dong，Tang Chun-an，Li Yuan-hui，et al.Study on AE activity characteristics under uniaxial compression loading［J］.Chinese Journal of Rock Mechanics and Engineering，2005，25(sup2):3673-3678.)
[14]Yuan S C，Harrison J P.An empirical dilatancy index for the dilatant deformation of rock［J］.International Journal of Rock Mechanics and Mining Science，2004，41:679-686.
[15]侯振坤，杨春和，郭印同，等.单轴压缩下龙马溪组页岩各向异性特征研究［J］.岩土力学，2015，36(9):2541-2550.(Hou Zhen-kun，Yang Chun-he，Guo Yin-tong，et al.Experimental study of anisotropic properties of Longmaxi formation shale under uniaxial compression［J］.Rock and Soil Mechanics，2015，36(9):2541-2550.)