Factors influencing the pumpability of unclassified tailings slurry and its interval division  

作　　者：Peng Li Yun-bing Hou Mei-feng Cai 

机构地区：[1]School of Civil and Resource Engineering,University of Science and Technology Beijing [2]Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education of China),University of Science and Technology Beijing [3]Beijing Key Laboratory of Urban Underground Space Engineering,University of Science and Technology Beijing [4]School of Resource and Safety Engineering,China University of Mining and Technology (Beijing)

出　　处：《International Journal of Minerals,Metallurgy and Materials》2019年第4期417-429,共13页矿物冶金与材料学报（英文版）

基　　金：financially supported by the Fundamental Research Funds for the Central Universities of China (No. FRF-TP-16-073A1);the State Key Research Development Program of China (Nos. 2017YFC0804103 and 2016YFC0600801);the National Key Basic Research Program of China (973 Program) (No. 2015CB060200)

摘　　要：Tailings consolidation and discharging technology is currently a popular means for disposing tailings in China. In this study, we describe a laboratory investigation of the unclassified tailings slurry from an iron mine and analyze the influence of the concentration,amount of consolidation agent, and types of consolidation agent on the pumpability in terms of the slump, slump flow, and bleeding rate of the slurry. The results indicate that an increase in concentration leads to a pronounced decrease in the magnitude of the slump, slump flow,and the bleeding rate. Compared with the consolidation agents P.O42.5 and P.S.A32.5, the new consolidation agent offers substantial advantages in promoting the pumping performance of the slurry. The concentration more strongly affects the slump, slump flow, and the bleeding rate of the slurry than does the amount of the consolidation agent. We also constructed the pumpability interval of the slurry on the basis of the slump and bleeding rate and accordingly determined the proportioning parameters of the slurry with a concentration of 75 wt% to79 wt% and with a consolidation agent concentration of 2 wt%. In addition, we discussed the pumpability mechanism of the slurry.Tailings consolidation and discharging technology is currently a popular means for disposing tailings in China. In this study, we describe a laboratory investigation of the unclassified tailings slurry from an iron mine and analyze the influence of the concentration,amount of consolidation agent, and types of consolidation agent on the pumpability in terms of the slump, slump flow, and bleeding rate of the slurry. The results indicate that an increase in concentration leads to a pronounced decrease in the magnitude of the slump, slump flow,and the bleeding rate. Compared with the consolidation agents P.O42.5 and P.S.A32.5, the new consolidation agent offers substantial advantages in promoting the pumping performance of the slurry. The concentration more strongly affects the slump, slump flow, and the bleeding rate of the slurry than does the amount of the consolidation agent. We also constructed the pumpability interval of the slurry on the basis of the slump and bleeding rate and accordingly determined the proportioning parameters of the slurry with a concentration of 75 wt% to79 wt% and with a consolidation agent concentration of 2 wt%. In addition, we discussed the pumpability mechanism of the slurry.

关 键 词：TAILINGS CONSOLIDATION and DISCHARGING technology unclassified TAILINGS new CONSOLIDATION agent PUMPABILITY INTERVAL PUMPABILITY mechanism 

分 类 号：TF[冶金工程]