Gold cyanidation is a hydrometallurgical technique for extracting gold from low grade ore by converting the gold to a water soluble coordination complex. It is the most commonly used leaching process for gold extraction.
Reaction Equation Of Separating Gold In Sodium Cyanide Extraction Of Gold Using Cyanide. The treated gold then has sodium cyanide added to it and the following reaction known as Elseners equation occurs 4Au 8CN O 2 2H 2 O 4AuCN 2 4OH In this form the gold is now soluble This process is known as leaching One form of this is heap leaching In this ...
Eisners equation is generally accepted as expressing the action of gold in dilute cyanide solutions; 4 Au+ 8 KCN + O2 + 2H2O = 4 KAu 2 + 4 KOH. Thus, when fresh surfaces of gold are exposed to the action of cyanide in an aqueous solution containing free oxygen, a gold cyanide compound will be formed and a hydroxide .
The gold is mixed with the sodium cyanide which leads to the following Elseners equation and reaction. This is done to make soluble gold; Now the gold is soluble. This method of making soluble gold is known as leaching. In the process of leaching, a dilute form of sodium cyanide is added into the ore containing the gold.
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Gold cyanidation
Gold cyanidation is a hydrometallurgical technique for extracting gold from low grade ore by converting the gold to a water soluble coordination complex. It is the most commonly used leaching process for gold extraction.