Some reports state HCl will dissolve platinum.
While other resesrch studies say, it won't.
Same storyline for Lead.
Some say HCl does dissolve lead while other report, No.
Oygen formation occures or chloride film on surface preventing
the HCl from dissolving the lead.
The given statement is true.
Pb does not dissolve in HCl as an insoluble film of PbCl2 is formed on Pb surface.
https://www.toppr.com/ask/en-ca/question/pb-does-not-dissolve-in-hcl/
QUESTION... Is using 4 part acid such a smart idea,
whereas 3 of the 4 acids are chloric in nature ?
FIRE ASSAYING Undissolved ( pulp ) sees fire assaying.
Whereas, more lead is added with an insuffcient heat to precipitate
the platinum group minerals from the lead.
= double wammy - assaying. WELLGREEN'S PLATINUM GROUP is present in,
peridotite,
nickel bonds,
lead bonds,
sediment hazen geology.
436,000,000 tonnes ( only wellgreen deposit ) of which....
2.4 billion pounds Nickel
33.5 billion pounds of lead ( using historical stats )
Welgreen Report - former post - significant extent of Ni incorporation in the Pd-(Pt) LET'S ASK THE QUESTION'S.... 1 - how important are assaying methods ?
2 - how much plat's are still bound to a nickel bond ?
3 - how much plats are still in a lead bond after - fire assay ?
lead is heavier than plat's first to melt, first in prill ?
would this result in - measurable portions of plat's left in slags ?
Besides significant nickel and plat bonds.... There are
numerous other minerals with - lead + plat bonds.
So much so, it begs the question, are current assaying methods
undermining the actual amount of plat's at Wellgreen ?
In my opinion - further assaying measres should be taken.
Losing the
produce mineral concentrate mindset and entertaining the possibility
of far more plat group oz could be realized if, better assaying techniques were implemented.
Though platinum can produce a chloric salt, one must still factor the attributes of platinum and oxygen evolution.
Platinum has the inherant ability to conjure oxygention evolution
which makes it the preferred candidate for -carbon monoxide emission
conversions to carbon dioxide ( 1/2 potent gas ).
Which brings into question would / a chloric film or oxygen layer develop on plats preventing
the dissolution of plats in a chloric acid ?
Ammonia + Nitric acid are the preferred stripping agents
In this research paper, they do use HCl. They also use, Nitric and ammonia to separate other minerals from, plat's.
Recoveries over 70 % were observed for platinum and ruthenium using
2 M HNO3 for stripping. It is reasonable to assume
selective separation of platinum at the re-extraction stage, implying the possibility of platinum separation during extraction.
The raffinates of PGMs in
NH4OH and HNO3 solutions are
highly preferred for further production of individual metallic fractions.
Minerals used in study Pt Pd Ru Ir Rh Fe Cu Ni Would be wonderful to see the research using - Nitric. Nitric first phase
Nitric + ammonia - follow up - stripping phase
What would the results be ?
https://www.sciencedirect.com/science/article/pii/S1383586622019839 Promised Rhodium by ncp in video prior to pfs.
No Rhodium in pfs.
pfs - has 100% less ( metal payable % ) than industry peers. ( odd )
no green energy / rivers nearby
existing major hwy
no iron nor magnesium credit ( shame on junior )
existing underground mine 4 km tunnels
$2.3 bil mine start up ( who dream that figure ? )
USA + European interests beginning to devour canadian assets
Junior is awefully silent.
Pretty sad.
Best move junior could make ? Pull the 4 geologies mentioned above.
Retest using Nitric + Ammonia
See if any addition plats precipitate from, lead, nickel, hazen sediment carbs.
Lots of nickel, Lots of lead.
Are plat oz being lost in multibonds...?
If significant plats were being lost...? It would make Kaplin's prized
Nova Gold look like childs play
This project could change from concentrate to, mining plats
and refining the oz's onsite.
Wonder if.... Anglo American or Anglo American Plc - knows of Wellgreen ?
They're pros when it comes to Plats.
Cheers...