Comparison of three cemented paste backfill distribution systems

Symposium 2015 Rouyn-Noranda
Mr Serge Ouellet (Agnico Eagle Mines Ltd.)
In the last five years, Agnico Eagle Mines commissioned three new paste backfill plants, Pinos Altos in Mexico, Kittilä in Finland and Goldex in Canada. The first two mines are laterally long with significant horizontal distance requiring elevated pumping pressure to deliver the paste while the third mine is vertical and this time the pressure needs to be controlled to respect the schedule of the pipe. This paper describes the reticulation systems for these three mines and compares the tailings characteristics (physical and rheological) and the backfill recipes. The flow loop testing results used for the design are also presented and compared with field data monitored during the operation.
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