" Help ! Have a deplating set up but cant get good yeild"

[Shunter421]

I skimmed through that paper and it looked like there are no big risks unless you have arsenic, antimony or mercury in the material you leach.

It didn't seem like the the gold leaching effect was so good as it only dissolved a minor part of the gold in the ore. Enough to be worthwhile to recover but the majority went along with the copper concentrate to the smelter.

For ram memory sticks, most of the gold is contained in the thin bond wires embedded in the plastic capsule. To expose the gold you need either to grind the material down to a fine powder or incinerate the chips. There are no other way to get to the gold.

Göran

thank you for your response yes i understand that there will be more gold inside the chips and ram i have a jaw crusher which im going to crush to the internal gold

thank you

 

[Yggdrasil]

when the solution is put into the tank "c" it precipitates over 5-6 hours of stirring with no heat.
im wondering of the no heat is the issue?
then the black gold dust is filtered out of the tank

then the waste solution is transferred to the next tank "d" where the zinc and vitamin c is added to neutralize the waster solution and then is discarded.

i think that their way of stripping the gold is ok but the precipitation is not working. My best option i think is to scrap all the mystery powders and potions and start from scratch with proven conventional methods

Aqua regia is going to be to expensive for the nitric acid it will out weigh the recovery because mixing up 300l of the solution per time will be far to costly.

What do you recommend as a cost effective alternative that would be more reliable ?

Absolutely blown away by hoe many people have reached out to assist i thought it was going to be a long shot but everyone has been so helpful !!

Many thanks

Aqua Regia is not suited to strip plating.
So you say that you are supposed to use Zinc and Ascorbic Acid?
Strange.
There are many processes that dissolves the Gold.
As long as it is acidic you have many ways to get rhe Gold out.
There is a thread from Deano discussing several among them "Neutral Saline Hypochlorite".
Cheap but I'm not sure of the speed.

 

[Yggdrasil]

absolutely agree with changing the chemistry with the equipment it must work surely.

Any thoughts on what to use chemistry wise?

Read this thread:
https://goldrefiningforum.com/threads/things-which-may-be-of-interest-to-members.21526/post-222215

 

[haveagojoe]

Personally I would not attempt to use a different method in a machine which it's not designed for, especially such an expensive one. I'd want to figure out the intended method. I would not worry about yields until the exact process can be established.

After reading more I am inclined to think (guess) that it is a form of Sodium Thiosulfate leach. There are some advantages to this process, as in itself Sodium Thiosulfate is non-toxic. The chemicals required are likely much cheaper than conventional acid-based processes. It also strips gold very quickly, faster than cyanide.

Again, the best course of action would be to obtain the information about the chemicals from the supplier, and if that is not possible then to do more thorough tests to find out what they are. At the very least, do litmus tests to determine whether your solution is acid or akaline. If possible take them to an analyst.

In the meantime I would be reading up about the various sulfur-based approaches. In my unprofessional (total amateur) opinion the process synthesises Sodium Thiosulfate from Sodium Bisulfate, Sodium Hydroxide and Sulfur in the mixing tank. However this is quite far out of my wheelhouse as I have no experience with Sulfur-based approaches.

 

[Shunter421]

Thank you for your help much appreciated

 

[Mech]

Only this thread in my email today , so getting a late start .
Did not fully read all replies - I did do a quick scan of all .
So not sure of repeats , or if you took in what I thought of .

Like at least on reply mentioned the vast majority of recoverable gold is inside the chips ,
Like any process finding what the least cost to you because of cost or available supplies & equipment .
I would suggest starting with classifying the different sources , gold plated items , chips - removed from boards etc.
Pyrolysing - heating / burning to at least gray if not white in color .
Or wet-ashing process - chemicals that you can access ---- which ever is cheaper for you & where you are .

My understanding is the bond wires in chips will run about 22 carat --- so doing separately , from other products that depending on process my be alloyed with other metals .

After heating , burning or wet-ashing , then its a simple gravity seperation , much like a sluice box , like in placer mining .