Copper dissolves while cementing.

[silver1]

If you have crushed the rock and looked at it under magnification and can't see any visible gold then the gold may not be in metallic form. Maybe the gold exist as a compound within the rock. It could exist in what looks like the iron part of this story. From the looks of that test solution the solution looks irony chloride color. Then you added stannous which reduced it to that brown color there (Iron) in your test. That would be my guess..... don't know. If you had that much iron in your solution then chances are it (Gold) never went into solution in the first place and is still on the residue (Rocks) from the leach. That's before you even start to discuss the grinding or fineness of the rock or proper roasting. A lot lot of things could have gone wrong.

 

[Martijn]

Thank you the reply

I agree with you,i guess is pure junk
I just put it a side and I will start
again
I learn from the advice giving to me here
and from all this mistake that a make.

I really don't see any brown powder
in the beaker.

i have another part of the same solution and i do stannous test
and this is what i get

You said you had black powder cemented on copper, so it's not all junk. Just not as clean as it should have been.

https://goldrefiningforum.com/threads/when-in-doubt-cement-it-out.30236/
Now why did you cement with zinc this time?

The light blue can be because of the zinc, now in solution. Giving a silverish look. Zinc chloride is colorless and clear like silver nitrate.
https://images.app.goo.gl/yq2ZPTcnir7655zA9

 

[minero74]

Thank You Martijn and Silver1

I learn a lot from yours advice

Yes it was lot of iron in those stone.
the mine story said it is a gold mine
perhaps i choose the wrong stones.

I cemment out with Zinc this time
trying a different process to find one that can bit faster than SSN.

i was doing placer before but now the is not lot of land close by for placer
because is the easier way

now i get into hard rock mining
that is a whole different way

but is very interesting,
finding a way to get the gold out off those stones in the safe manner possible

and i wont quit
i will try as many time i can and
i will find a way to get the gold out off those stone
there are lot of lode mine around

but very few mine with free mill gold

one mill site with lot of green stones

the old miners were melting those stone on site.

i'm posting some pictures of those stones
they were focus only on those two types of ore

 

[Martijn]

I think you're better off to learn to fire assay and cupel.

 

[orvi]

I will try to abandon the leaching approach. In some circumstances, it could work, but I don´t consider this approach easy and replicable. Too many factors which could mess it up.

I will perform fire assay. If you aren´t certain that no mercury or cadmium are present, do not do it on your own. If you have means to undoubtly confirm there is no mercury and cadmium, go for it (like well calibrated XRF of reputable brand, capable to run "geochem" mode. or ICP analysis better). You can also replace lead with bismuth, making it less toxic.

 

[minero74]

Thank you Martijn and Orvi
I will follow your advice
Judging by the size of the Slag in that Mill site
that's the way it is.

and a friend talk me about a place
where they do fire assay.

Thanks a lot guys

 

[orvi]

Thank you Martijn and Orvi
I will follow your advice
Judging by the size of the Slag in that Mill site
that's the way it is.

and a friend talk me about a place
where they do fire assay.

Thanks a lot guys

Inform us how it was going.
I hope that you successfuly test the ore with good results.

Orvi

 

[minero74]

Thank you
For all your advice and sharing the valuable knowledge you guys have.

I will let you guys know
thank you very much

 

[EAR74]

We're you able to get fire assay done?I read so many threads of success ,failure,and the questionable due to process and profitability.I do wish you luck,health ,and promising future.I look forward to updates from many people and process reports that lead to successful safe profitable refining.