Experimental Study on Continuous Settlement Law Under Solid-Liquid Two Phase Coupling Conditions of Unclassified Tailings

Qian KANG; Yunmin WANG; Yan HE; Xilong XUE; Chuxuan ZHANG

doi:10.11872/j.issn.1005-2518.2019.06.896

2019 , Vol. 27 >Issue 6: 896 - 902

DOI: https://doi.org/10.11872/j.issn.1005-2518.2019.06.896

Mining Technology and Mine Management

Experimental Study on Continuous Settlement Law Under Solid-Liquid Two Phase Coupling Conditions of Unclassified Tailings

Qian KANG ^,¹^,² ,
Yunmin WANG ¹ ,
Yan HE ³ ,
Xilong XUE ² ,
Chuxuan ZHANG ^,²

Expand

1. Sinosteel Maanshan Institute of Mining Research Co. , Ltd. ，Maanshan 243000，Anhui，China
2. School of Resources & Environment and Safety Engineering，University of South China，Hengyang 421001，Hunan，China
3. School of Resources and Safety Engineering，Central South University，Changsha 410083，Hunan，China

Received date: 2018-12-05

Revised date: 2019-07-02

Online published: 2019-12-24

Fold

Highlights

The technology of unclassified tailings high concentration backfilling has been applied to underground mining gradually.Because it has many advantages such as environmental protection，less dehydration，dispose more tailings.The grain size of tailings are getting smaller and smaller with the progress of beneficiation technology. This situation leads to the result of tailings concentration is unsatisfactory. Aiming at the difficulty of concentrating the super fine tailings of a lead-zinc mine in Jiangxi，this study explored the feasibility of adding flocculant to improve its concentration effect.On the basis of physical and chemical properties analysis for solid-liquid two phase coupling respectively under the condition of static and dynamic flocculation settlement of orthogonal test，we determine the tail slurry flocculating settling velocity in the enrichment，and by using the MATLAB software carry on the regression analysis of experimental data for the selection and dosage of flocculant，which provides the basis for the determination of optimal concentration of diluted slurry.Firstly，varieties and dosage of flocculants were determined through static natural settlement tests.Secondly，dynamic flocculation settling tests were conducted according to the varieties and dosage of flocculants that determined before.The influence of feeding speed to the clarity degree of overflow water and the underflow concentration were tested.The experimental results show that the feeding speed by 0.89 t/(m² ·h) reduced to 0.60 t/(m² ·h)，overflow water solid content gradually decreased，when the feed concentration 13.59%，the concentration of the AH-910-SH type flocculant is 20 g/t，the feeding speed is 0.60 t/(m² ·h)，the underflow concentration reached a maximum of 72.82%，the overflow water solid content is 162.68×10^-6 （<300×10^-6），the superfine all backfilling flocculation sedimentation effect is best.This test provided theoretical basis to the rapid settlement technology of ultra-fine unclassified tailings.Thus，the test established the technical foundation of high concentration backfilling of ultra-fine unclassified tailings.The results of the study have certain significance for the application of continuous settlement technology of unclassified tailings.

Cite this article

Qian KANG , Yunmin WANG , Yan HE , Xilong XUE , Chuxuan ZHANG . Experimental Study on Continuous Settlement Law Under Solid-Liquid Two Phase Coupling Conditions of Unclassified Tailings[J]. Gold Science and Technology, 2019 , 27(6) : 896 -902 . DOI: 10.11872/j.issn.1005-2518.2019.06.896

[an error occurred while processing this directive]

References

Publishing order | Descend order by publishing year | Descend order by cited within

1	Wang X M， Zhao B， Zhang C S，et al. Paste-like self-flowing transportation backfill technology based on coal gangue[J].Mining Science and Technology，2009，19（2）：137-143.

2	Zhang J， Qiang S， Fourie A，et al. Risk assessment and prevention of surface subsidence in deep multiple coal seam mining under dense above-ground buildings： Case study[J].Human and Ecological Risk Assessment，2018（4）：1-15.

3	Wang A， Ma L， Wang Z，et al. Soil and water conservation in mining area based on ground surface subsidence control： Development of a high-water swelling material and its application in backfilling mining[J].Environmental Earth Sciences，2016，75（9）：779-788.

4	史秀志，胡海燕，杜向红，等. 立式砂仓尾砂浆液絮凝沉降试验研究[J]. 矿冶工程，2010，30（3）：1-3. Shi Xiuzhi， Hu Haiyan， Du Xianghong，et al. Experimental study on flocculating sedimentation of tailings slurry in a vertical sand tank[J].Mining and Metallurgical Engineering，2010，30（3）：1-3.

5	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，1994：117-130. Fei Xiangjun.Hydraulics of Transporting Slurry and Granular Material[M].Beijing：Tsinghua University Press，1994： 117-130.

6	吕宪俊，金子桥，胡术刚，等.细粒尾矿充填料浆的流变性及充填能力研究[J].金属矿山，2011，41（5）： 32-35. Xianjun Lü， Jin Ziqiao， Hu Shugang，et al. Study on the rheological property and filling capacity of the filling slurry with fine tailing[J]. Metal Mine，2011，41（5）： 32-35.

7	王星，瞿圆媛，胡伟伟，等.尾矿浆絮凝沉降影响因素的试验研究[J]，金属矿山，2008，38（5）： 149-153. Wang Xing， Qu Yuanyuan， Hu Weiwei，et al. Experiment research on factors influencing tailing pulp flocculation settling[J]. Metal Mine，2008，38（5）： 149-153.

8	Meunier L， Koch I， Reimer K J. Effect of particle size on arsenic bioaccessibility in gold mine tailings of Nova Scotia[J].Science of the Unclassified Environment，2011，409（11）：2233-2243.

9	De Kretser R G， Scales P J. The effect of temperature on the yield stress of mineral suspensions[J]. Journal of Colloid and Interface Science，2008，328（1）： 187-193.

10	Schowalter W R， Christensen G.Toward a rationalization of the slump test for fresh concrete：Comparisons of calculations and experiments[J]. Journal of Rheology，1998，42（4）： 865-870.

11	Bauer E， de Sousa J G G， GuimarSes E A，et al. Study of the laboratory Vane test on mortars[J].Building and Environment，2007，42（1）： 86-92.

12	Ferraris C F， Gaidis J M. Connection between the rheology of concrete and rheology of cement paste [J]. ACI Materials Journal，1992，89（4）： 383-393.

13	王新民，肖卫国，王小卫，等.金川全尾砂膏体充填料浆流变特性研究[J].矿冶工程，2002,22（3）： 13-16. Wang Xinmin， Xiao Weiguo， Wang Xiaowei，et al. Study on rheological properies of full tailing paste filling slurry of Jinchuan mine[J]. Mining and Metallurgical Engineering，2002,22（3）： 13-16.

14	王洪武，吴爱祥，刘超，等.五道岭钼矿全尾砂絮凝沉降试验研究[J].昆明理工大学学报，2010，35（2）： 1-4. Wang Hongwu， Wu Aixiang， Liu Chao，et al. Experimental study on unclassified tailings flocculation and settlement in Wudaoling molybdenum mine[J].Journal of Kunming University of Science and Technology，2010，35（2）： 1-4.

15	湛含辉，罗彦伟.高浓度细粒煤泥水的絮凝沉降研究[J].煤炭科学技术，2007，35（2）：77-79. Zhan Hanhui， Luo Yanwei. Research on flocculation setting of high density fine particle coal slurry[J]. Coal Science and Technology，2007，35（2）：77-79.

16	焦华喆，王洪江，吴爱祥，等.全尾砂絮凝沉降规律及其机理[J].北京科技大学学报，2010，32（6）：702-707. Jiao Huazhe， Wang Hongjiang， Wu Aixiang，et al. Rule and mechanism of flocculation sedimentation of unclassified tailings[J]. Journal of University of Science and Technology Beijing，2010，32（6）：702-707.

17	刘晓辉，吴爱祥，王洪江，等.膏体充填尾矿浓密规律初探[J].金属矿山，2009，39（9）：38-44. Liu Xiaohui， Wu Aixiang， Wang Hongjiang，et al. A primary discussion on the thickening law of paste-filling[J]. Metal Mine，2009，39（9）：38-44.

18	He M， Wang Y， Forssberg E. Slurry rheology in wet ultrafine grinding of industrial minerals： A review[J]. Powder Technology，2004，147（1）： 94-112.

19	Wong H H C， Kwan A K H. Rheology of cement paste： Role of excess water to solid surface area ratio [J]. Journal of Materials in Civil Engineering，2008，20（2）： 189-197.

20	Saak A W， Jennings H M， Shah S P. The influence of wall slip on yield stress and viscoelastic measurements of cement paste [J]. Cement and Concrete Research，2001，31（2）： 205-212.

Options

Outlines