arthur kierski
Well-known member
i only got results after almost 2years of trying(experiments)---i wrote a thread about it but i will repeat it,since i do not remember where i wrote it---------------------------------------------------------------------------------------------------------------------
the metalic powder scrap was first incinerated(to expose the metals in tiny chips)----then this powder which was magnetic (ni,fe) was leached with a 20%h2so4 solution----at the first moment of this leaching,very small reaction----after adding drops of hno3 to the sulfuric leaching solution,it became violent and dissolved all the ni,fe,and some other base metals----the remained powder now non magnetic,was treated with ar for gold and pd----the powder left from the ar leach (agcl) was treated with nh4oh-------
the results were very good ----1,5 grams of au,1gram of pd and 7grams of ag per kilo--
thanks and sorry that i did not pass these experiment before
regards
Arthur
the metalic powder scrap was first incinerated(to expose the metals in tiny chips)----then this powder which was magnetic (ni,fe) was leached with a 20%h2so4 solution----at the first moment of this leaching,very small reaction----after adding drops of hno3 to the sulfuric leaching solution,it became violent and dissolved all the ni,fe,and some other base metals----the remained powder now non magnetic,was treated with ar for gold and pd----the powder left from the ar leach (agcl) was treated with nh4oh-------
the results were very good ----1,5 grams of au,1gram of pd and 7grams of ag per kilo--
thanks and sorry that i did not pass these experiment before
regards
Arthur
