Costs of Cu & Zn Processing12 May 2020 10:07
https://www.sciencedirect.com/science/article/pii/S0301420716300824
An interesting article for those with the patience to read it. A little out of date so allow for inflation but it shows the processing costs for Cu & Zn for mainly labour and energy. Typical costs for Zn are 500 Eur / with inflation maybe now $600/T and Cu cathode for Zambia at 150 Eur / T, again with inflation approx 180 $ /T. this is for metal and not concentrate. Again take with a large question mark because it will exclude, depreciation costs, Mgt O/H costs, sales costs etc there is also a comment on Sulphuric acid and its high costs. This will be interesting for JLP on an intercompany basis because it makes it's own sulphuric acid and will thus add margin within its process in total.
The interesting point to note is that Cu is much lower than Zn and yet the Cu price is much higher, thus leaving higher margins on Cu.
Simple calcs show from a purely processing perspective:
Copper cathode $5,200/T less $180 /T = $5,020.
Taking JLP's miniumum 15% smelter margin = $780 and that still leaves a healthy $4,240/T.
JLP will be mixing the 3rd party Ore with their own so we will also be getting margin from our own Ore. I estimate it will be 60% 3rd party and 40% ours to begin with. In conclusion there is plenty of margin for all concerned in Copper. One can expect that Cobalt is the same. As yet we don't know the full processing rates so it is difficult to work out our total contribution from Copper but we have the ramp up numbers so we can work out some provisional figures.
Zinc Processing:
Zn price $2,000/T Zn Conc = $1,700.
Zn Conc - Processing costs = $1,700 - $600 = $1,100.
JLP min 15% processing margin = $255.
Remaining amount = $845/T.
Again 3rd party ore will be mixed with our Ore, Correct me if I am wrong but I believe our average grade is 11% and 3rd party will be not less than 14% but I suspect higher. Working of 18% of 3rd part Ore that would give us 38% of the balance and the 3rd party (GLR) 62%. i.e.
JLP - $321
GLR - $524
Current processing rate to be 8500T of zinc Conc.
So we can still make money from Zinc but it would appear that the potential to make money from Copper and Cobalt is much more.
Very, very quick calcs so please feel free to pull them apart - I am sure you all know by know I have no emotional attachment to the numbers i put out so please be brutal if you think they are wrong !!
My provisio's to the above would be:
1) In all my years of industrial and mining experience I always find that the initial costs are too low, there are always additional costs that come to bite us. We certainly know that from PGM's and Chrome.
2) Because the final Tonnes of metal above are quite low then JLP may require more than 15% to cover the Sable overheads.
3) Still does not explain why GLR's numbers for costs on Zinc from their own RNS's are significantly higher than mine - I will email CB on this point.
ps The link shows no Zn refineries in