Mod,
I made up a spreadsheet to crunch these numbers and if you take the small cell up to 120 g/l copper running .925 sterling, you should be able to pump out 2000 ounces of silver with under 1% copper in it as a contaminant. Less in the beginning and more at the end. Rinsing electrolyte from harvested cells is your friend. What is nice is 10 gallons of cell solution is easy to handle for cementing and waste treating, and depending on how fast you can push the 2000 ounces through you may need a few running.
The "high grade" cell starting with the silver you made in the smaller cell will process 15 times as much silver of high purity before the 1% copper fouls the electrolyte. The foul electrolyte from the high grade cell will still function in the smaller cell to further raise the copper before changing it out. Less waste = more profit.
Remember the second cell will function better if you add some copper to start as the feed silver will provide little.
I made up a spreadsheet to crunch these numbers and if you take the small cell up to 120 g/l copper running .925 sterling, you should be able to pump out 2000 ounces of silver with under 1% copper in it as a contaminant. Less in the beginning and more at the end. Rinsing electrolyte from harvested cells is your friend. What is nice is 10 gallons of cell solution is easy to handle for cementing and waste treating, and depending on how fast you can push the 2000 ounces through you may need a few running.
The "high grade" cell starting with the silver you made in the smaller cell will process 15 times as much silver of high purity before the 1% copper fouls the electrolyte. The foul electrolyte from the high grade cell will still function in the smaller cell to further raise the copper before changing it out. Less waste = more profit.
Remember the second cell will function better if you add some copper to start as the feed silver will provide little.