Gold, platinum fast step of refining at high recoveries are as follows: Crude gold (90%) for high-speed electrochemical refining - "vacuum suction filtration - "cation exchange -" reduction washing -" 60 minutes 2 minutes 10 minutes 30 minutes Vacuum suction filtration - "bake high frequency smelting (99.95% boutique) 2 minutes 5 minutes A total of 110 minutes! If you use the aqua regia method to accurately test (1000 g of crude gold) with the same recovery rate and the same purification accuracy, it takes 600 minutes! Crude Platinum (95%) for high-speed electrochemical refining - "Pull filtration -" carrier hydrolysis twice - "filtering -" 60 minutes 2 minutes 60 minutes 2 minutes Concentration to bromine - "cation exchange -" ammonium chloride reduction precipitation - "filtration washing -" hydrazine reduction washing -" 40 minutes 10 minutes 10 minutes 10 minutes 5 minutes Baking high frequency smelting (99.95% boutique ) 5 minutes A total of 210 minutes! If you use the aqua regia method to perform the exact test (1000 g of crude platinum) under the same requirements, it takes 48 hours! Important equipment used in the process: one 20 kg gold electro-hydraulic machine, one 20 kg platinum electro-hydraulic machine, one small vacuum pump, one set of four-stage cation exchanger, portable table, one small baking furnace . (It is best to have a spectrum analyzer when conditions are available, so that the high-frequency furnace can be identified in time for the boutique)

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