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The gold in the circuit board extraction method, the text tells you the answer
A, electronic products gold refining method
Electronics gold refining is to disassemble the product, the impurities in the alloy gold removal, so that gold products can meet the gold trading quality standard requirements of the process. At present, the refining methods mainly have chlorination purification, aqua regia purification method, electrolysis purification, chloramine method purification, etc.
Second, gold refining and waste gas / wastewater treatment process
The impure gold will be used with aqua regia. Dissolve to generate chlorogold acid, sodium bisulfite as reducing agent, the chlorogold acid will be reduced to gold powder precipitation, and then purification, washing, drying, adding flux in high temperature melting and get the color of gold, to achieve pure gold process. The technology is low investment, simple process, low cost, high recovery rate of gold.
