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

[Shunter421]

y

If there's gold in there it can't escape
If it's colloidal, maybe time passing will have allowed it to flocculate. You could try to filter it again to see what you get.
But to be realistic, if you didn't crush your material at the start, the gold is still hidden inside the chips. I would look into that first. Do you still have the material you processed?

es i still have the material i processed im going to shred some of it and jaw crush some of it to see what has the best returns as i know there is some gold still inside of the items

 

[Shunter421]

Have you been able to get an pH yet?

Yes did today

10.58 for solution that has been sitting uncovered

12.15 for the solution that has been sitting in tanks.

I’ve been electrocuting for 1.5 hours and got some color

 

[haveagojoe]

Those readings would seem consistent with the idea that the gold stayed in solution because the pH was too high. If my theory about the process is correct, it should be between 9 and 10.

When you're adding the NaOH to tank C prior to precipitation, the purpose is to adjust the pH upwards, so don't just add all 7kg at once, add it slowly in increments and test with the meter inbetween until the pH is right, aiming for 9.5.

If it's too high it can be adjusted down by adding an acid. Sulfuric would be cheapest but it's quite nasty stuff, I would probably opt for hydrochloric though I don't know what would be most appropriate for this process. Whichever you use, add it in small increments and wear proper safety gear.

It would probably be a good idea to test the pH several times during the precipitation stage while the solution is being stirred in tank C. If it fluctuates you can adjust up or down accordingly.

As I've said before this process is outside my experience and I think you should get some professional in-person advice. I don't want you to have an accident so remember I am just a random guy on the internet.

 

[Yggdrasil]

Those readings would seem consistent with the idea that the gold stayed in solution because the pH was too high. If my theory about the process is correct, it should be between 9 and 10.

When you're adding the NaOH to tank C prior to precipitation, the purpose is to adjust the pH upwards, so don't just add all 7kg at once, add it slowly in increments and test with the meter inbetween until the pH is right, aiming for 9.5.

If it's too high it can be adjusted down by adding an acid. Sulfuric would be cheapest but it's quite nasty stuff, I would probably opt for hydrochloric though I don't know what would be most appropriate for this process. Whichever you use, add it in small increments and wear proper safety gear.

It would probably be a good idea to test the pH several times during the precipitation stage while the solution is being stirred in tank C. If it fluctuates you can adjust up or down accordingly.

As I've said before this process is outside my experience and I think you should get some professional in-person advice. I don't want you to have an accident so remember I am just a random guy on the internet.

Your advice is based on the assumption that your guess of leachant is correct.
I'd wait until we actually know what we are dealing with.
Until then, he should follow the producers guidelines.

 

[Yggdrasil]

Yes did today

10.58 for solution that has been sitting uncovered

12.15 for the solution that has been sitting in tanks.

I’ve been electrocuting for 1.5 hours and got some color

The color looks promising