Abstract
A new technology characterized by rapidly non-mechanical settlement of unclassified tailings was developed based on a large number of tests, and dynamic settlement and continual slurry preparation without hardening in vertical sand silo were eventually realized by the addition of an effective flocculating agent (NPA). The results show that the sedimentation velocity of interface between unclassified tailings and water after the addition of NPA increases by 10–20 times, the sedimentation mass fraction of unclassified tailings at the bottom of vertical sand silo is up to 64%, the solid particle content of waste water meets the national standard, and the side influences of NPA can be removed by the addition of fly ash. The industrial test result shows that the system, the addition manner and the equipments are rational, and the vertical sand silo is used efficiently. This developed system is simple with large throughput, and the processing cost is 2.2 yuan(RMB)/m3, only 10%–20% of that by mechanical settlement.
Similar content being viewed by others
References
GU De-sheng, LI Xin-bing. Modern mining science and technology for metal mineral resources [M]. Beijing: Metallurgy Industrial Press, 2006. (in Chinese)
SI Jing-cai, CHANG Jie-chen, CHEN Xiao-xing. Reliability of paste fill system of the Jinchuan No.2 mine [J]. Journal of University of Science and Technology Beijing, 2002, 9(3): 166–169.
GAO Ying-li, ZHOU Shi-qiong. Influence of ultra-fine fly ash on hydration shrinkage of cement paste [J]. J Cent South Univ Tech, 2005, 12(5): 596–600.
WANG Xin-min, XU Dong-sheng. Comprehensive evaluation of the quality in downward drift stoping [J]. China Mining Magazine, 2006, 15(11): 62–65. (in Chinese)
CUI Jian-qiang, SUN Heng-hu, ZHANG Yu-cheng. A new mode of coal mining under buildings with paste-like backfill technology [J]. Journal of China University of Mining and Technology, 2002, 12(2):143–147.
WANG Xin-min. Cemented filling industry experiment and prosductive research of Kangjiawan mine [R]. Hengyang: Kangjiawan Mine of Shuikoushan Mining Bureau, 2003. (in Chinese)
HAN Bin, WU Ai-xiang, DENG Jian, WANG Xian-lai. Backfill technical analysis based on reliability theory in the underhand drift cut-and-filling stoping [J]. Journal of Central South University: Science and Technology, 2006, 37(3): 583–587. (in Chinese
ZHANG Chang-suo, WANG Chen, FU Yi. Study on restraining surficial mud on unclassified tailing filling body [J]. Mining and Metallurgy, 2004, 13(3): 1–5. (in Chinese)
FENG Ju-en, WU Chao, YAO Zhen-gong. Experiment research on improving filling effect with flocculants [J]. Metal Mine, 2005(10): 12–19. (in Chinese)
LI Rong-ting, ZHENG Ya-jie, PENG Zhen-hua, PENG Chang-hong. Simulated dyeing wastewater treated by DMDAAC and its composite flocculant [J]. Journal of Central South University: Science and Technology, 2008, 39(4): 658–664. (in Chinese)
XU Xiao-jun. Flocculation principle [M]. Beijing: Science Press, 2005. (in Chinese)
CHEN Liang, LIN Zhi-yan, CHEN Dong-hui. Flocculation kinetics of chitosan [J]. Journal of Donghua University, 2003, 20(1): 1–3.
MA Fang, WANG Qin, MENG Lu, XU Yang, YANG Ji-xian. The flocculation efficiency of compound bio-flocculant by flocculant-producing bacteria [J]. Journal of Harbin Institute of Technology, 2006, 13(4): 435–438.
LANDR IAULT D A, BROWN R E, COUNTER D B. Paste backfill study for deep mining at Kidd Creek [J]. CIM Bulletin, 2000, 93(1036): 156–161.
LIU Zhi-yong, ZHANG Dong-chen. Study on flocculating mechanism of microbial flocculate for coal slurry [J]. Express Information of Mining Industry, 2008(4): 45–47. (in Chinese)
PATERSON A J C, COOKE R. Design of hydraulic backfill distribution system-lesson from case studies [C]// Proceedings of the 6th International Symposium on Mining with Backfill. Brisbane, Australia: Institute of Mining and Metallurgy, 1998: 121–127.
ZHANG Qin-li, WANG Xin-min. Performance of cemented coal gangue backfill [J]. J Cent South Univ Tech, 2007, 14(2): 216–219.
HOU Hao-bo, HE Xing-hua, ZHU Shu-jing, ZHANG Da-jie. The cement solidification of municipal solid waste incineration fly ash [J]. Journal of Wuhan University of Technology: Material Science Edition, 2006, 21(4): 137–140.
WANG Xin-min, ZHANG Qin-li. The research of cemented filling experiment in Kangjiawan Mine [R]. Changsha: Central South University, 2002. (in Chinese)
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Project(2006BAB02A03) supported by National Key Technology Research and Development Program; Project(2006BA02B05) supported by Key Programs for Science and Technology Development of China during the 11th Five Year
Rights and permissions
About this article
Cite this article
Wang, Xm., Zhao, B., Zhang, Ql. et al. Cemented backfilling technology with unclassified tailings based on vertical sand silo. J. Cent. South Univ. Technol. 15, 801–807 (2008). https://doi.org/10.1007/s11771-008-0148-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-008-0148-y