July 11, 2020, 05:37:43 AM
Forum Rules: Read This Before Posting


Topic: Extracting Gold, Silver, Copper from ore  (Read 32846 times)

0 Members and 1 Guest are viewing this topic.

Offline Arkcon

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7360
  • Mole Snacks: +533/-147
Re: Extracting Gold, Silver, Copper from ore
« Reply #15 on: March 28, 2008, 11:16:13 AM »
Free metallic copper, which is occasionally found native, (you will have to check, perhaps microscopically, in your particular ore sample) only reacts with hot concentrated nitric, and evolves many nitrogen oxides, not just NO2 (and it's equally nasty nasty partner N2O2) but even N2O (hey, no fooling around, you have lots of work to do).  The safe way to dissolve copper is with sulfuric and oxygen.  For certain definitions of the word, "safe."

More important, can you see another, quantitative problem with your switch?
« Last Edit: March 28, 2008, 11:41:19 AM by Arkcon »
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline FIFOkid

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
Re: Extracting Gold, Silver, Copper from ore
« Reply #16 on: August 11, 2008, 11:17:34 AM »
I would first determine if the ore is an oxide or a sulphide? In commercial applications oxides tend to be leached with sulfuric acid and sulphides with cyanide before it goes through the circuit.

Offline cloomis

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +1/-0
Re: Extracting Gold, Silver, Copper from ore
« Reply #17 on: September 07, 2008, 07:28:14 PM »
goldrefiningforum.com has all the info and explains how to do these processes

Sponsored Links