How Is Gold Purified? | Sciencing
Apr 24, 2017· How Is Gold Purified? ... Initial Processing of DifferentTyes of Ore. If the gold is a low grade ore, then it is broken up into chunks that are then put in carefully lined pads and treated with a dilute cyanide solution, which dissolves the gold. For high grade ore, the metal is sent to a grinding mill and made into a powder. ...