Abstract:

According to the principle of”simultaneous equilibrium”and ”mass equilibrium”, the extracting system of gold in it's ore with bromine has been thermodynamically analyzed. The diagrams of E-pH have been drawn and discussed. From the diagrams of E-pH it has been suggested that the influences of the concent rations of gold ions, bromineion and temperature to the equilibrium potentials. With the gold extracting, the concentration of gold ions will be increasing, the equilibrium potentials will be enhanced, and the hydrolyzed pH of the gold ions and the stabilization region of the solution will be decreasing. On the contrary, if the concent ration of bromine in the extracting solution is increased, the equilibrium potentials will be depressed, and the hydrolyzed pH of the gold ions and the stabilization region of the solution will be increasing. In the same way, if the temperature of the solution is increased, the stabilization region of the solution will be increasing. So the increase of the concentration of bromine and the temperature is propitious to the gold extraction.

Key words: Gold Ore, Bromine, Equilibrium Potential, Diagram of E-pH