BACKTESTING -I have confidence in mineral grade averages which are based on
numerous drill campaign and several labs inwhich creates comparables.
If we use the 16.4% Mg average which represents Mg grades across
all geologies - what would be the average pound in 1 tonne of ore ?
2200 pounds
x 16.4% Mg avg
= 360.80 / lbs
1 tonne should be used as test ores
Using a 151.4/g sample makes a mess of things
I also noticed the Sulphur is quite high. ( cleaner concentrate )
Average sulphur grades across all zones = 0.77 % ( under 1% )
How can
under 1% sulphur increase to greater percentage of iron?
When iron is far greater in % than sulphur ?
Cleaner con = 23.22% - remember this is now a concentrate nolonger
a 3 part % of 151.4/g
Throw a dart ? ( speculative in nature ) Could the
more than double Mg avg have seen a sulphur acid soak
while in MET studies ?
Wild card ? NCP ores mixed with major's concentrate to see if blending
would result in easy intergration of ncp's ores ?
If.... 1,000,000 grams = 1 tonne then,
1,000,000 grames
~ 151.4/g
= 6605 ( batches of 151.4/g ) = 1/tonne representation ( i used 151.1/g former post )
If we apply 1st Mg value reporting to Mag Scav 1st circuit
37.4% of 151.4/g
= 56.62/g
x 6505 ( batches = 1 tonne )
= 368313/g
= 811 lbs There are two more reporting circuits with Mg
The first phase reports 811 lbs
What was our original,Mg % over all zones ?
16.4% = 360/lbs 811 lbs - 360 lbs
= 451 lbs over original 16.4% Mg tonne value .... and two more phases with Mg
Which is why it's oh so important to keep to - 1 tonne represenative ore tests.
If i use the
151.4/g and scale using
6618 batches of 151.4/g to match
1,000,000/g = 1 tonne ( the numerical outcomes are quite diff. )
I'd grab 1 tonne actual represenative. ( matching zonage grades - chart below )
Find another MET test lab and obtain a second opinion
Asking for all irons to be extracted firstly with magnetite first then roast
= What values are in the irons ( all minerals )
Most Mg should bypass this 1st phase being nonmagnetic
= Pull PGM's
= What remain's ?
= Could a 1.8% nickel iron con be achieved if 9 - 10 raw tonnes processed ?
= If so.... 1st phase magnetite + Iron would be a cash cow
Remaining Ores see larger curcuit ( flowsheet )
Sulphur + Magnesium These are the 2 mineral constituents that stand out as -
odd values.
Hence why not revise PFS
Run with a simple 1.8% nickel + iron concentrate
Easy to achieve
Iron becomes a payable 
If my calculations are off.
By no means is it intention.
I'm open to scrutiny and objecture.
Simply trying to... make sense of the pfs which is reflective of former studies.
Do chime in, if i'm wrong.
Open to correction.
Thanks ( forward )
Cheers...