The technological process and advantages of gold extraction equipment for waste circuit boards
With the popularization of electronic products in various fields, especially the upgrading of electronic products such as mobile phones, computers and televisions, electronic waste has been produced in large quantities. According to --- in electronic waste, the gold content of each ton of waste electronic equipment is 17 times that of gold mines, and the computer circuit board gold extraction equipment has 40 times the copper content of copper mines. Hundreds of millions of tons of e-waste are generated every year, like a huge "urban mine". The circuit boards of used phones have the highest gold content. According to the report of the United Nations, metals such as copper, cobalt, silver and gold in the mobile phones of Ichibe account for 23% of their weight. About 130 kilograms of copper, 2 kilograms of silver, 0.4 kilograms of gold and 80 grams of palladium can be separated in a ton of waste mobile phone circuit cards.
Process flow of gold extraction equipment for waste circuit boards:
The waste circuit board gold extraction equipment is used to sort and refine precious metal gold, silver, palladium and platinum from electronic waste containing precious metal chip components and anode slime. Chips, north-south bridges, storage chips, integrated circuits, and plastic encapsulation field effects that cannot be returned after disassembly are all components with the highest gold and silver content in the components that conform to the unified treatment, and can be used for ozone baking (ozone can completely destroy the combustion. Harmful flue gas), roasting slag adopts solvent carrier, leaching copper, lead tin, hydrochloric acid medium to extract gold, platinum and palladium, extracting gold, platinum and palladium. For the chip capacitors with high silver and palladium, the silver palladium is independently extracted by the acid method. For the gold-plated circuit boards and plug-ins, it is recommended to use a fluorine-free environmental protection gold-removing agent to quickly strip the gold.
For silver-containing and palladium-based acoustic surfaces, metal encapsulated transistors, and integrated circuits, the metal shell is removed by a special cutting machine. After punching out the chip, valuable metals are extracted according to the chip and integrated circuit solutions. , After smelting, metal aluminum is directly smelted. Valuable diodes, partial varactor diodes, and other glass-encapsulated components, plastic-encapsulated light-emitting tubes are crushed and crushed to extract valuable metals. Produce electrolytic copper, palladium-containing circuit board (double-sided circuit board basically contains palladium, palladium as a copper-plated substrate contained in the guide hole as a wire) and then palladium is leached with acid, and then extracted to extract palladium.
Product features of waste circuit board gold extraction equipment:
1. The wastewater can be discharged up to standard after being treated
2. The recovery rate of gold, silver, palladium, platinum and other precious metals can be as high as 97-99%
3. The purity of precious metals can be as high as 99.99%
4. The operation process is highly automated, saving labor costs.
5. The treatment process is short, and the fluorine-free environmentally friendly hydrometallurgical process is adopted to reduce environmental pollution.
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