RE:RE:RE:Anyone who is interested on doing a little DD.....One more thing I forgot to mention.....If you do a little research you will find that copper smelters almost exclusively process flotation concentrates.....which is why i specified that the gold recoveries were achieved using that method.
Also, here is where I got my information regarding the level of gold which is paid for by smelters....
https://www.teck.com/media/CESL-Publication-Gold-New-Gold-Process-Alta-2007.pdf