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Goldman said:
If you would like to process brazing bars, one way to do it safely is by using an electrolitic cell with the brazing bars as anode, copper sheet as cathode and copper sulfate as the electrolite.... A power supply ( I have used an old NOKIA cell phone charger 5V/1A)... It takes time but there is no extra effort and costs whatsoever.
After you collect the dirty silver in form of black residue from the bottom of the cell you can easily use cupellation to purify it since it will contain very low concentration of copper.
I have processed 15% and 35% brazing bars this way...less headaches with copper.

This is a much better option than cupellation and led fumes. It will also get you paid on the copper. If you need more details go to the library section and look up the copper electrolytic cells.

Cupellation is a valuable tool for quantifying the material before purchase but for recovery Goldman is right on.

<blockquote data-quote="4metals" data-source="post: 317330" data-attributes="member: 6914">Goldman said:If you would like to process brazing bars, one way to do it safely is by using an electrolitic cell with the brazing bars as anode, copper sheet as cathode and copper sulfate as the electrolite.... A power supply ( I have used an old NOKIA cell phone charger 5V/1A)... It takes time but there is no extra effort and costs whatsoever.After you collect the dirty silver in form of black residue from the bottom of the cell you can easily use cupellation to purify it since it will contain very low concentration of copper.I have processed 15% and 35% brazing bars this way...less headaches with copper.This is a much better option than cupellation and led fumes. It will also get you paid on the copper. If you need more details go to the library section and look up the copper electrolytic cells. Cupellation is a valuable tool for quantifying the material before purchase but for recovery Goldman is right on.</blockquote>

[QUOTE="4metals, post: 317330, member: 6914"] Goldman said: If you would like to process brazing bars, one way to do it safely is by using an electrolitic cell with the brazing bars as anode, copper sheet as cathode and copper sulfate as the electrolite.... A power supply ( I have used an old NOKIA cell phone charger 5V/1A)... It takes time but there is no extra effort and costs whatsoever. After you collect the dirty silver in form of black residue from the bottom of the cell you can easily use cupellation to purify it since it will contain very low concentration of copper. I have processed 15% and 35% brazing bars this way...less headaches with copper. This is a much better option than cupellation and led fumes. It will also get you paid on the copper. If you need more details go to the library section and look up the copper electrolytic cells. Cupellation is a valuable tool for quantifying the material before purchase but for recovery Goldman is right on. [/QUOTE]

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