Lihir Facts ProcessingLihir processing plant is designed to process Mtpa of ore containing % sulphide sulphur at a gold grade of up to 13 g/t and a plant availability of 86% The instantaneous design feed rate is 375 t/h of ore containing 27 t of sulphide sulphur There is a legal obligation under the mining permit to examine the potential for a production expansion A simplified process flow diagram PDF 58