[pure-silver] Re: Silver Recovery
- From: "mail1" <mail1@xxxxxxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Sat, 29 Dec 2007 12:22:33 -0800
Mark First I would consider starting an EBay search for an X-Rite or Drew
silver recovery system. Usual $75 to $100 will buy the unit.
If you are so inclined to make your own these are the problems you will need
to consider.
Circulation of the solution is necessary to furnish a continuous supply of
silver bearing fixer to the cathode (negative plate).
Controlling of plating current is important. A current of 8 amps will
recover 1 try ounce of silver in 1 hour in a very efficient recovery cell.
The plating efficiency is usually lower with silver concentrations below 1
gram per liter.
The ASR-4 unit has a row of LEDs, and a switch to adjust the amperage. The
bucket is filled; the amperage is adjusted to 4 amps. The cathode rotates
and when the amperage indicating LEDs turn off the process is done. The
E-rite works on the same principle except it has a meter. Usually some
testing of silver concentrations are done the verify operation. If the
current is not reduced as the silver concentration reduces in the fixer
solution a sulfiding of the Cathode will take place. The cathode will look
dark, soft, and mushy. The deposits should be a light to medium brown. If
the deposits are pure white in color, and the solution concentrations are
known to be low the current needs to be increased. An increase in voltage
will increase amperage.
Good luck, Jonathan Ayers [mail1@xxxxxxxxxxxxxxxxx]
_____
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Mark Blackwell
Sent: Friday, December 28, 2007 3:08 PM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: Silver Recovery
Just a few times a month and very low volumes. The silver bucket may be a
more practical option.
mail1 <mail1@xxxxxxxxxxxxxxxxx> wrote:
How much liquid are you planning to process, and how often?
Jonathan
[mail1@xxxxxxxxxxxxxxxxx]
_____
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