Dear Prof.
Mansour,
I am back to my Swiss
office.
Expert in gold extractions here
told me that 5 ppm is a very small gold content. Only what could help is
to find some new, revolutionary technology which will speed up stones/powder
dissolving. Usually in such situations, people are applying some strong
acids and first dissolving raw material in a liquid form, and the next step is
electrochemical process…
Our strategy would be to treat
your powderized stones using usual strong chemistry and in addition make
ultrasonic cavitational process stimulation and
acceleration…
We will make some simple test and
see if there is something promising.
Regards,
Miodrag