sim contacts

[arthur kierski]

i have thousands of sim contacts from Nokia cellphones,and only the contacts are gold plated----
question:how should i deal with them to obtain the gold?

 

[lazersteve]

Acid peroxide or 35% nitric followed by HCl-Cl or AR.

Steve

 

[dtectr]

i have thousands of sim contacts from Nokia cellphones,and only the contacts are gold plated----
question:how should i deal with them to obtain the gold?

which models of Nokia phones are you processing? The few i have done have had good quality plating, too. I would be curious for later reference.
thanks

 

[arthur kierski]

dtectr---the nokia cellphones comes in batches to me----but they look much alike the fotos that you have sent to the forum----as i get all types of cellphones(nokia,ericson,samsung,and others that i do not remember now),my main interest is the yealds of pms in each type---
i am processing over 250kilos of cellboards monthly --(very hard labour)to separate the components for processing--------all i can tell you now is that the barren boards have 0,17grams of gold per kilo and 1kilo of complete boards after taken out the components weights 540grams(average)
thanks for the information you sent to the forum----