How much gold can come out of 7 pounds of screen wiring

7 pounds of screen wires can produce 1.05 grams of gold. A study shows that a kilogram of cell phone motherboard can be refined 0.3 grams of gold, from 1 ton of discarded cell phones can be extracted 150 grams of gold, 100 kilograms of copper and 3 kilograms of silver. In accordance with China's current annual waste of 100 million cell phone estimates, the total weight of these used cell phones up to 10,000 tons, if the recycling process can extract 1,500 kilograms of gold, 1 million kilograms of copper, 30,000 kilograms of silver. This gold is required to specialize in the extraction. The real gold inside the cell phone you can not find.