Well apparently from the 10gm sample recrushed glass ceramic powder in nitric.
Silver chloride was found. Not much but enough to make me continue.
I'm under the impression there was no need for roasting.
The ceramics are heavy enough to drop and filtering easy after they settle.
Per the bold print - as long as you used distilled water with the nitric leach there should be NO silver chloride
According to the XRF read out the powder has 3.647 % Sn (tin) in it so the white cloud you are seeing is more then likely meta-stannic acid - the nasty tin paste refiners hate as a result of tin reacting with the nitric
Wow.... what a loss.
The powder yield was absolutely miniscule unmeasurable.
The 10gm roast and melt mixed with borax gave me a sticky mass of brown glass like.
Crushed the glass and found super tiny piece of metal unmeasurable.
Your test melt may not be a true representation of the actual metal in the powder - in other words there may (or not) be more metal in the powder then you are seeing in that test melt
As pointed out by 4metals - IF (the BIG IF) there is ceramic in the powder that can "prevent" some of the metal from properly melting - even to the point that it will not form into beads of metal that can be seen with the naked eye which means it "could" be tied up in the slag & you just don't see it even as tiny beads
This is because the ceramic particles could very well literally be "combined" with metal particles (from when they milled the powder originally) thereby preventing all the metal from actually melting & forming actual metal beads
To overcome that problem you MUST have a flux that will "dissolve" the ceramic in order to allow the metal to actually melt & then slag off just the ceramic - so you NEED cryolite &/or at least fluorspar to dissolve away the ceramic from the combined ceramic/metal so that only the ceramic goes off in the slag --- if there is a lot of ceramic you will also NEED a collector metal otherwise metal that is to small to see with the naked eye can very well end up in the slag
As well - if the ceramic & metal has been "combined" (from original milling of the powder) it is very likely that you will not get all the metal leached out of the powder with acid leaching as the ceramic - if combined with the metal will prevent the acid from fully dissolving the metals
I have the rest sitting in nitric.
I hope you don't mean that you put ALL of your powder in acid to leach it - but that you are doing a small test sample leach ???
So - IF (the BIG IF again) you still have most of this powder yet - you need to do another test melt (smelt actually) & you need to do that with some cryolite in your flux
I see you live in Boise Idaho - I live only 3 hours away from you & I have both cryolite & fluorspar so if you still have most of this powder yet we can make arrangements to get you some of that & you don't need much so I will just give you what you need
Do NOT provide you personal info (phone # etc.) here on the open forum - send me a PM so we can make arrangements to get you cryolite & fluorspar - IF you need it
Kurt