Prieska optimisation work advances
PERTH (miningweekly.com) – South Africa-focused Orion Minerals on Thursday said that optimisation work at its Prieska copper project was progressing well, with the company hoping to complete an improved and simple-to-execute project plan by next year.
Key studies currently under way at the Prieska project include water treatment trials, investigating supplementary means of dealing with the water to be pumped from the underground workings, value engineering of the ore processing plant designs and layouts to improve operational factors and reduce capital and operating costs, and mine-to-market enterprise optimisation of the foundation phase mining plan to assess key market drivers.
“We continue to progress a number of significant optimisation opportunities identified during the preparation of the foundation phase bankable feasibility study for the Prieska project,” said Orion MD Errol Smart.
“Dewatering the mine is a significant workstream and is the critical path activity where the greatest impact may be achieved on development timelines and capital costs. Positive results from water treatment trials mean that we now have more options for dewatering and can improve on what we see as an already very robust plan.”
Smart said that, in addition, semi-autogenous grinding (SAG) mill testwork has indicated reduced processing plant capital and operating costs, with the SAG milling offering a real alternative to ball milling.
The A$378-million Prieska project is expected to produce at a rate of 2.4-million tonnes a year, producing 189 000 t of copper and 580 000 t of zinc in its ten-year foundation phase.
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