JV Mill _ Calcs & Income10 Jan 2024 15:32
Reprinted extract from my 13-Sept-23 post with all RNS data, %recovery, throughput & income calcs:
Summary RNS 6-Jun-23
> Phase 1 JV Gravity Separation is anticipating a 50% recovery whilst Phase 2 chemical leaching expecting 90% recovery for an aggregate recovery of 80% via both stages when complete ie Phase2 recovers a further 30% of original materials metal content
> "Plant throughput: "upto 5 tonnes/hour of feedstock but there is likely to be an initial period of lower volumes before the plant is running consistently"
> "JV's aim will be to operate the mill for 70 or more hours per week for plus or minus 48 weeks per year to allow for maintenance and possible weather downtime. "
> "Plant capacity can subsequently be increased in excess of 5 tonnes per hour when needed with only minor investment and without a commensurate increase in operating expense. "
So initial nameplate gravity separation throughput = 5t/hour * 70 hours/week *48 weeks = 27.4 kt/year. We know OMCO surface tailing alone is 31kt with Inferred MRE OMCO tailings = 1,600oz gold & 3,000oz Silver metal.
Assuming just OMCO tailing processed via gravity at 50% recovery implies 800oz gold & 1,500oz silver recovery at 90% value to base metal as GWMO will be providing a concentrate not refined metal.
Throughput @27.4kt/year = 2,280kt/month
Gold recovery via gravity separation = 50% *2,280kt/31,000kt *1,600oz = 59oz/month
Silver recovery via gravity separation = 50% *2,280kt/31,000kt *3,000oz = 110oz/month or ~1.5 AU Eqoz
Revenue = 90% *60.5oz *$1,900 = $103.5k or $8.6k/month
Note 1: Update to Jan-2024 as POG is circa $2k/oz >>> Revenue = 90% *60.5oz *$2,000 = $109k or £7.1k/month
Note 2: Residual ore can be set aside for reprocessing when Stage 2 plant is up and running to recover a further 30% of original metal content as Stage 1 only = 50%, Stage 2 only=90% so Stage 1+2=80% overall recovery
Note 3: Plant throughput "currently" 5 tons/hour which can be upgraded with no change in running costs but capital cost not stated
Note 4: GWMO also gets 50% of any future JV revenue from toll milling fees
Note 5: calcs above only use OMCO tailings as other tailings heaps have no JORC (yet)
Note 6: OMCO has JORC for 31kt of tailings, processed at 2,280kt/month =13.6 months of feedstock assuming mill throughput has not been upgraded
ATB APR