GodLiegeman
Member
So,my first try to recover gold scrap.About 2kg in total,ram sticks,boards ,pins and etc. Added everything to my container-1.5 L water,scraps, 1L nitric acid and by my dumbest mistake 0.5 l muriatic acid.
Next morning,very nice turquoise color. No foils,check the bottle,face palm.
Now I will explain what I did.Tests:
1.Sample 200ml, added Urea to neutralise Nitric. SC negative. Precipitated with SMB. Have insane white layer on bottom,filtered.Remaining solution blue, SC positive (!!?) .Boiled it of and decanted multiple times with water, solids reduced. Dissolved in muriatic, changed color to deep green. Filtered solids,washed ,dissolved in AR ,Urea added.SC negative.
2.Sample 150ml. Added 50 ml muriatic,instant change color to deep green. Added urea. Precipitation with SMB, reaction very strong.Bubbles forming ,stoped when intense smell came and reaction almost not visible.NO precipitation at all.SC positive.( Assumed due to excess gas)
3.Sample 40 ml. Added urea .Small amount of sulfuric acid. No precipitation of white powder. Adding some muriatic, change color to deep green.
4. 200ml added urea.Peace of copper to solution. Washed of cement from copper(white and black colours) , dissolving solids in AR. Very small sample. Added urea( multiple stages of addition and testing) SC negative.
Question is. My base solution still have some solids on bottom after course filtering and siting still for couple of days,maybe gold is there ?
Why does solution change from blue to green when I add some muriatic to it?
What should I do to my base sollution and in general how do I recover ?
And what can give SC false positive ?
Next morning,very nice turquoise color. No foils,check the bottle,face palm.
Now I will explain what I did.Tests:
1.Sample 200ml, added Urea to neutralise Nitric. SC negative. Precipitated with SMB. Have insane white layer on bottom,filtered.Remaining solution blue, SC positive (!!?) .Boiled it of and decanted multiple times with water, solids reduced. Dissolved in muriatic, changed color to deep green. Filtered solids,washed ,dissolved in AR ,Urea added.SC negative.
2.Sample 150ml. Added 50 ml muriatic,instant change color to deep green. Added urea. Precipitation with SMB, reaction very strong.Bubbles forming ,stoped when intense smell came and reaction almost not visible.NO precipitation at all.SC positive.( Assumed due to excess gas)
3.Sample 40 ml. Added urea .Small amount of sulfuric acid. No precipitation of white powder. Adding some muriatic, change color to deep green.
4. 200ml added urea.Peace of copper to solution. Washed of cement from copper(white and black colours) , dissolving solids in AR. Very small sample. Added urea( multiple stages of addition and testing) SC negative.
Question is. My base solution still have some solids on bottom after course filtering and siting still for couple of days,maybe gold is there ?
Why does solution change from blue to green when I add some muriatic to it?
What should I do to my base sollution and in general how do I recover ?
And what can give SC false positive ?