RE:RE:RE:RE:RE:Jordaan on KEReport today, outstanding interview... Exactly.
Yes, sorting can increase the grade of a bulk sample.
However, the problem is the throughput rate. On finely-diseminated tiny particles of gold, you have to slow the conveyer way down, and may only process a few tons/hour. Try to speed it up, and you start sending too much of the gold to the reject pile.
All in my naive opinion, do your own due diligence.
Done repeating myself.