Waste mobile phone refine the complete process of gold
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Waste mobile phone refine the complete process of gold
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The first step is to remove the phone and take out the circuit board inside.
The second step, put the circuit board in the cup, and then pour the concentrated nitric acid. Then they will have a chemical reaction. At this time, they should pay attention to covering their noses, because chemical reactions will cause harmful gases.
The third step, remove the circuit board after the reaction, and filter the remaining liquid with gauze.
[Extended information]:
1, gold (GOLD) is a single form of chemical element (AU), which is a soft, golden, corrosive precious metal. Gold is one of the rare, precious and extremely valued metals. Internationally, gold is generally based on ounces. In ancient China, "two" was used as a gold unit, and it was a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments.
2, the chemical symbol of gold is AU, and the English code in finance is XAU or GOLD. The name of the AU comes from a story of Aurora, a goddess of dawn in Roman mythology, means shining dawn.
3, gold, as a precious metal, has good physical characteristics. "Real gold is not afraid of fire refining" is that the chemical stability of gold is very high. It is not easy to have chemical reactions with other substances. Do not worry about oxidation and discoloration. Even in the melting state, it will not be oxidized and discolored. The density is strong and the feel is heavy. Good toughness and ductility, good guidance. Pure gold has gorgeous yellow, but after incorporating other metals, the color changes greatly. For example, gold and copper alloy are dark red, and the silver alloy is light yellow or gray -white. Jin Yi was grinded into powder, which is why Jin is scattered in nature. Pure gold jewelry is also easily worn and reduced.
4, although gold is a very soft metal, it is not as good as lead and tin metal. Use nails on pure gold to draw traces. This softness makes gold very easy to process. However, this point is not ideal for the maker of the decoration, because it is easy to make the decorations hurt and make it make it make it wound and make it it. Lost luster and even affect beauty. Therefore, when making jewelry with gold, copper and silver are generally added to improve their hardness.