Best way to refine close to 60% silver.

[Amol Gupta]

It's a pretty good way. The point of undershooting is so that all the chloride comes out with the silver and is not distilled over with the nitric acid. You leave a little silver and you can estimate how many mols of HCl you need by how many mols of silver you have in solution. For me this way is not economical because Nitric acid is cheap enough, but if I had a 10L short path distillation kit, I would do it, maybe under vacuum with some scrubbing system in line with the vacuum.

I'd rather keep things plain and simple to start of with, I'm really not technically equiped to deal with silver chloride, to the best of my knowledge the process you suggest(mixing with a strong acid) is better carried out with sulphuric acid a link to which I have provided in the first comment.