Investor Presentaiton

Lihir recovery improvement options • • • • Increase float fines recovery by Increase utilisation of installed float tails leach (FTL) facility by addressing backend capacity constraints • Autoclave improvements reduced available space in Counter Current Decantation (CCD) unit for FTL Adding low cost CCD bypass to leach circuit for full FTL use Modelling of back end system to identify equipment bottlenecks Looking to balance of float tails to be unlocked by debottlenecking Carbon In Leach and carbon systems Engineering started on shortlisted options to define capital cost and economic amount of float tails to process Optimising front end processing to improve recovery Exploring alternative classification systems to send gold streams to more optimal recovery systems Float Tails Leach cyclone pack 22 22

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