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gold platinum recycling equipment

     

(1) Dissolve in aqua regia:The residues are placed in a reaction container, and hydrochloric acid (HCl) and nitric acid (HNO3) are added in a 3:1 ratio by mass. The mixture is heated to a temperature between 60°C and 80°C using steam, allowing gold and platinum to dissolve in the solution. After the reaction is complete, the solution is filtered and washed, with the filtrate being sent for platinum extraction.

(2) Based on the differences in the reaction processes of platinum and gold, a separation is performed:Ammonium chloride (NH4Cl) is added to the filtered solution to precipitate platinum, while gold does not form a precipitate at this stage. The solution is then filtered again, and the resulting ammonioplatinum chloride is calcined to produce crude platinum, which contains gold in a high-temperature solution that is then sent for gold reduction.

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