THE USE OF PASTE FOR DISPOSAL OF MILL TAILINGS

3rd International Scientific Conference - SGEM2003, www.sgem.org, SGEM2003 Conference Proceedings/ ISBN: 954-918181-2, June 9-13, 2003, 109- 120pp

ABSTRACT

In recent years, use of paste backfill has evolved from an experimental
backfill method with limited application to a technically viable and economically
attractive alternative. This is primarily due to the development of dewatering and
transportation systems that allow for controlled and consistent production and
delivery of paste in a cost-effective manner. In addition, it has been recognized
that underground backfill provides for a mechanism to safely dispose of mine
wastes such as tailings, which results in cost savings and reduced immediate and
long-term liability. Minimizing this liability through a reduction in surface
disposal will have a beneficial effect on the feasibility of any mining venture. In
addition to use of paste for underground backfill, the improvements in dewatering
and transport technology have generated industry interest in disposal of tailings as
a paste. The benefits of paste technology for disposal of acid-generating tailings
are many, and cover a wide range of issues, including design, operation,
reclamation, environmental protection, and public perception. This paper focuses
on the potential environmental benefits afforded by use of paste technology when
tailings are acid-generating.