Just had a look at Verdant Minerals 2018 Annual Report...

Just had a look at Verdant Minerals 2018 Annual Report

https://hotcopper.com.au/threads/ann-financial-statements-annual-report-june2018.4460822/#.W8vXdssUn1I

Page 7 Extract
The business case was established around an initial project (Stage 1, installed cost of A$368M) to produce 1 million tonnes per annum of phosphate rock concentrate enabling infrastructure including a rail spur, gas pipeline and water supply infrastructure for the whole mine life and beyond would be constructed during Stage 1.

This will be followed by a replication of the Stage 1 processing and site infrastructure during year 5 to produce 2 million tonnes per annum of rock concentrate from year 6 for a 20 year mine life (Stage 2, A$200M).

Initial 20 year mine life represents utilization of approximately 8% of the known Ammaroo JORC 2012 Mineral Resource and does not include the inferred resource at Ammaroo South or the exploration potential of the Rockhole prospect.

Production is based on conventional truck and shovel open pit mining and a screening, crushing, grinding and flotation circuit to produce a low cadmium, high quality rock concentrate at approximately 33% P2O5. Ore Reserve for the first 9.5 years of production of 32.5 Mt at 18.2% P2O5 at a cut-off grade of 10% P2O5 which has converted approximately 10.8% of the current Measured and Indicated Mineral Resource to Ore Reserve.


As far as I can see this operation differs from Phosphate Hill gas wise as it mainly requires gas for electricity generation for Crushing Conveyors Etc.
There is no reformer to produce ammonia from gas & no acid supply.

Phosphate hill is about a 1M ton mining & crushing operation & its power station is 30MW so say 5 TJ/day should be enough scaling it off Owen Springs.

Regards OGP