kurtak
Well-known member
So this is the fluff and stuff that I found that wasn't burnt enough. I still got most material in a jar settling so I can rinse then also incinerate. I don't know if I have quite the capabilities to do a proper pyrolization. I mean I tried to do it in my electric furnace but not enough space for far too much material. So other than torching these until they are white what else can I do? Check out the picture and tell me if this is enough? I'm going to mortar and pestle it as well.
In the pic you provided with the above post - it looks like the chips you burned are the BGA type chips from the more modern RAM - that is evident by the small sheets of fiberglass in the "green" board part of the chip
These are high yield chips 4 - 5 grams per kilo --- however they are also the most difficult chip to process because
1) the bond wires are VERY SMALL
2) the fiberglass sheet in the green board part of the chip which makes separation/concentration of those very small bond wires very difficult - the very small bond wires like to get locked up in the fiberglass
3) therefore you can not run them threw a true concentration process (wash carbon/ash away to get a good concentrate) All of the burned material needs to leached - so ALL the carbon needs to be eliminated (burned to complete ash)
4) the entire process - to insure you get all you values back - is to complicated to describe in this post - as there are different stages/process you have to do with these chips compared to all other types of chips (thanks to that dam fiberglass)
Right now - my concern - after enlarging the pic & looking at it - I see what looks like a LOT blobs of melted metal in the burned material (though the pic gets quite blurry when enlarged
Those blobs of metal that I see tell me a couple possible things that are likely going to complicate the processing of your burned chips
1) those blobs of metal are tin solder because before burning the chips you did not remove the solder balls on the bottom of chips by dissolving the solder ball off the chips - with HCl - before burning the chips
2) IF (the BIG IF) you did remove the solder balls (before burning) then when you burned the chips you got them so hot it melted the thin copper between the green fiber board & the black epoxy top
So --- VERY IMPORTANT QUESTION --- did you soak the chips in HCl - to dissolve the solder balls off the chips before burning them ?
Kurt