The mobile phone board of the folk Chemistry master

A mobile phone to buy when less than hundreds of yuan, more than thousands of yuan, if the elimination will be thrown directly into the dustbin, how much some reluctant. Can be used for the use of mobile phones at home is useless, manufacturers because their parts can no longer use and refuse to recycle. Therefore, Guangxi Chemical Design Institute of retired workers Zhou actual mobile phone smelting gold, mobile phone board can really refining gold, but its purity and content depends on the number of waste mobile phone.

Mr. Zhou's metal samples from the scrap cell phone

Disconnect the phone and remove the motherboard

Put the motherboard in the solution

The motherboard dissolves to react

Toxic Gas Treatment

7 motherboards to produce a small bag of gold particles

How to make gold by mobile phone

How does a mobile phone make gold? Mr. Zhou said that by chemical means, gold can be refined in one day. However, the chemical reaction will produce poisonous gas-dioxide, corrosive and physiological stimulation, people with respiratory problems, such as asthma patients, vulnerable. Moreover, the dioxide damage to the human body is irreversible.

Electronic waste contains many harmful substances, such as poor treatment, can seriously endanger human health and life. Therefore, Mr. Zhou advised the general public not to have a certain degree of chemical knowledge, do not know how to deal with these poisonous gases, do not imitate. In addition, without relevant environmental certification and without approval, it is illegal to open underground workshops to refine precious metals.

Step one: Remove the phone and pull out the circuit board

Disconnect the phone back cover and pull out the circuit board. The plastic shell, screen and other metal-free parts on one side, the circuit board together, into a large kettle.

Step Two: Melt circuit board, emit poisonous gas

Use iron pots to put water on the electromagnetic stove to heat. Mr. Zhou said that the use of iron pots is mainly for uniform heating.

Put the kettle on the circuit board into the pot, and then pour the prepared concentrated nitric acid into the kettle and completely immerse the circuit board. Concentrated nitric acid solution immediately filled with fine bubbles, brown-red gas began to spill out continuously. These gases are dioxide, such as excessive inhalation of the respiratory tract and the lungs are irreversible damage.

Mr. Zhou said that in the process of chemical reaction, he specially used three water pipes to deal with this poisonous gas, after treatment and then discharged almost no smell. But if you do not handle it, even if you open the window and the door to do the experiment, the gas will choke people.

Step three: Continue to react, the emergence of small particles of metal

The main board in the kettle in a chemical reaction half an hour later, the solution has become green. In the meantime, in addition to the color of the solution green, there are many shiny small particles in the solution. These small particles are metals that are insoluble in nitric acid, most of which are precious metals. In addition to gold, there may be more valuable than gold palladium and so on.

"Cannot dissolve too long, the metal will dissolve instead of time." Mr. Zhou said that he had been doing experiments before the dissolution reaction time is too long, refining the metal is less.

Fourth step: slag filtration, metal particles need to separate

After sufficient chemical reaction, the metal is washed clean, then the slag removal, filtration. Then a small, shiny little particle emerges.