Waste electronic materials include precious metals such as Gold, Silver, Platinum, Palladium, Copper and other base metals. This kind of business called "Urban Mining" last years. Because in the ore there are gold materials around 3-10 gram per ton but in the e-waste depends on material quality can find more than 400 gram per ton. With gold mineral, also can recovery copper, silver and palladium. Therefore, the most important business area is an e-waste field.
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