Journal
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
Volume 26, Issue 4, Pages 417-429Publisher
SPRINGER
DOI: 10.1007/s12613-019-1750-8
Keywords
tailings consolidation and discharging technology; unclassified tailings; new consolidation agent; pumpability interval; pumpability mechanism
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Funding
- Fundamental Research Funds for the Central Universities of China [FRF-TP-16-073A1]
- State Key Research Development Program of China [2017YFC0804103, 2016YFC0600801]
- National Key Basic Research Program of China (973 Program) [2015CB060200]
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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 75wt% to 79wt% and with a consolidation agent concentration of 2wt%. In addition, we discussed the pumpability mechanism of the slurry.
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