I heard that waste computers can refine 3 grams of gold. Is it true?

it is true.
CPU update is fast. Once eliminated, it becomes electronic garbage, which is worthless. But you may not know that the CPU hidden precious metals that have been appreciated in the past two years -gold.
Li Dianwu, a senior student at the Department of Chemistry of Nankai University, made 3 small golden beads from 5 abandoned CPUs. He put the process of refining on the Internet, causing a sensation.
Li Dianwu said that this refining method is called sulfur alchemy, which is different from the Wangshui alchemy method used in some small workshops. This method is environmentally friendly and fast. It reached 99.99%.
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Peviners remind them not to try at will
The Mr. Ye, who works in the metal organic chemistry industry, fully affirmed the advantages of sulfur sulfur method. However, there are also some disadvantages, such as a slightly higher price, large consumption, and strong corrosiveness. The popularization rate in the actual precious metal recycling industry is not high.
As for some netizens intending to learn from Li Dianwu's CPU's CPU funds, "manipulating the sword in person" at home, Mr. Ye said NO: "Although the sulfur sulfur is relatively non -toxic, the CPU funds require a large number of chemical preparations and equipment Some are not allowed to own it.
and there is no professional guidance. The chemical reactions are easy to get out of control. Try it at will. Do not lose money. Do not make fun of yourself for such precious metals. "
References Source: China Broadcasting Network-Nankai University senior students refined high purity gold beads from abandoned CPU
Reference materials Source: Zhongan Online-5 abandoned CPUs to refine 3 small gold beads? CPU can really make gold?

Yes, 1 -ton computer board can refine 1 kg of gold. This is true. It is definitely golden. Using gold.

For fake, the gold proposed is not enough cost at all, let alone make money. The merchants are selling their own puppets and equipment. Don't be deceived.