Grinding Circuit Evolution

SHERMAN, COLLINS

Sherman M1, Collins A2,

1.Technical Director, Fluor Australia Pty Ltd, Melbourne VIC 3004. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

2.M&M Functional Manager Process Technology, Fluor Australia Pty Ltd, Perth WA 6000: This email address is being protected from spambots. You need JavaScript enabled to view it.

Presented at World Gold 2019

ABTRACT

The ever changing demands of providing operating teams with grinding circuits that meet their needs has resulted in equipment suppliers offering a broader range of grinding equipment and researchers investigating more efficient methods of reducing the size of ore.

This paper presents Fluor’s learnings from grinding design and optimisation work carried out over the last decade, which includes the design and construction of the world’s largest High Pressure Grinding Rolls (HPGR) based grinding circuits and the optimisation of Semi-Autogenous Grinding (SAG) mill liner and grate design at a number of sites. In addition, this paper also presents emerging opportunities for reducing grinding operating costs by combining established size reduction technologies, such as HPGR, ball milling and stirred milling, to generate a superior processing outcome for the operator.

ACKNOWLEDGEMENTS

Fluor thanks the operating, technical,and leadership teams of the Cowal, Telfer, Rosebel, and Batu Hijau processing plants for their permission to reference their operating data in this pape

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