Lino1406 said:
What is seen here, is 0.1 g at most around $6 brutto. Now make your balance
Lucy - per the underlined - what Lino is saying - is that "at most" you
might get as much as 0.1 gram gold
from a kilo of those boards (in other words NOT per board - but per kilo of boards)
To do this you need to set up an area of your scrap yard for doing the recovery - then the refining of the gold
You need to have a way to control/scrub the fumes of the acids --- or EVERYTHING in the work area WILL rust
The work area also needs to contain chemical spills
Then you need to still treat the chemical "waste" after recovery/refining of the gold
By the time you factor in cost to set up a work area - cost of chemicals to first recover/refine & then treat waste - & cost of time to run the process (including waste treatment) --- it will cost you MORE then what you recover
Is there gold on those boards ? - yes - but they are still considered LOW grade boards
Trust me - I spent 11 years - as a business - dealing with circuit boards - The VAST majority of the boards I handled (like 2 tons per month) I sold - as is - to the bigger board buyers --- & that is because there is NO why to make money trying to process the vast majority of CBs - you can ONLY make a PROFIT if you process the VERY HIGHEST grade of E-waste - which is what I did - which amounted to about 1 - 3 % of all the E-waste I handled
Did I make money processing the "very highest grade" stuff ? - yes --- but that's because it was VERY HIGH yield stuff --- but I made FAR more money simply selling the VAST majority of boards directly to the BIG board buyers
For what it worth
Kurt