Gold refining systems

Hi i want to know if the Shor refining systems works ok for ingots
and the cost is 1-2 us per oz or higher.If are another system could
work better please inform me, Thank you, Paul.

Their are several other systems that work as explained in detail in
the book ''JEWELERY MANUFACTURING, THE ART AND SCIENCE AVAILABLE FROM
THE GESSWEIN CO, or the CONTENTI CO. 1-800-343 3364