| The precious metal iridium was recovered from titanium anode deplating by oxidation precipitation, reduction dissolution and other processes. The experiment determined the best process conditions. When the red-ox potential is greater than 900 mV, the amount of ammonium chloride is more than 1 times of iridium, the precipitation rate of iridium is greater than 98%, and the reduction pH value is 3, a small amount of platinum, palladium, rhodium and ruthenium impurities in iridium can be separated well. The method is suitable for the treatment of iridium waste with iridium as the main body and the content of precious metal impurities reduced. The operation is simple and the purity of the product can meet the requirements of the national standard. |
