The International Journal of Mineral Resources Engineering, vol.12, no.2, pp.129-144, 2007 (Peer-Reviewed Journal)
This paper examines the influence of
desliming pre-treatment of mine tailings on the strength development of the
resultant paste backfill. The mill tailings were sampled from an underground
copper-zinc mine in northeast Turkey
(tailings samples A and B). The beaker decantation method was used for tailings
desliming in order to determine the proper particle size distribution (PSD). Using
this laboratory sedimentation method, the fine particles (-20 µm) amount of the
total tailings samples A (52%) and B (54%) were reduced to 15% and 20%, respectively.
Deslimed tailings paste backfill samples were then prepared, cured and subjected
to uniaxial compression tests using a digital mechanical press so as to
understand the relationship between PSD and backfill strength development. It
was found that the averaged 28-day uniaxial compressive strength (UCS) values of
desliming pre-treatment tailings paste backfill samples were 30% to 60% higher
than the ones of total mill tailings paste backfill samples.