The application of ultra-fine grinding for Sunrise Dam Gold Mine

Paz, Ypelaan, Ryan, McInnes

Presented at the AusIMM Mill Operators Conference June 2021

ABSTRACT

The Anglo Gold Ashanti (AGA) Sunrise Dam Gold Recovery Enhancement Project (REP) was an upgrade project to the existing process plant to increase gold recovery. The project required the existing screened cyclone overflow to be redirected into a new flotation and ultra-fine grinding circuit, producing concentrate up to a rate of 400000t/a.

MetsoOutotec supplied six TC200Tank Cell®flotation units, one 14m High Rate Thickener and one HIGmill®HIG3500/23000. At this point in time the HIGmill is the world’slargest stirred mill supplied into a pyrite concentrate regrind duty.

This paper discusses the HIGmill test work and sizing, the challenges of commissioning and ramp-upand subsequent design optimisations.The energy efficiency and operational performanceis also discussed.

ACKNOWLEDGEMENTS

The authors would like to thank AngloGold Ashanti Australia Ltd and MetsoOutotec for permission to publish this work.

AUTHORS

A Paz1, C Ypelaan2, T Ryan3and M McInnes4

1.Senior Process Engineer, Metso Outotec, Perth WA 6005. Email:This email address is being protected from spambots. You need JavaScript enabled to view it.

2. Metallurgical Superintendent, AngloGoldAshanti Australia Ltd, Sunrise Dam, Laverton WA 6440. Email:This email address is being protected from spambots. You need JavaScript enabled to view it.

3. Manager Engineering Support, AngloGoldAshanti Australia Ltd, Sunrise Dam, Laverton WA 6440. Email:This email address is being protected from spambots. You need JavaScript enabled to view it.

4. Director Service Technical Support, Metso Outotec, Perth WA 6005. Email:This email address is being protected from spambots. You need JavaScript enabled to view it.

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