1. Waste electronic circuit board. Such as waste computer boards, telecom boards, VCD boards, TV boards, etc.
2. All kinds of gold-plated parts. Such as aviation plugs, gold-plated plug-ins on various electrical appliances, gold-plated electronic components, electronic feet, gold-plated handicrafts, etc.
3. Various electroplating wastewater and sludge containing precious metals.
I have been engaged in oil refining for many years and have done all kinds of waste mentioned above. If you are interested in this, you can contact me, I can teach you, including raw material identification, valuation, separation and disassembly, refining, the prices and properties of various outsourced raw materials, etc ... I can also provide you with some medicines that are difficult to buy. I know that people who come to this forum are not very rich, but I can't teach for free, and I want to send you the information by express, so I will charge you some fees (50-500) according to what you have learned. There are many things that can be learned in stages, such as learning to do gold first and then learning to do silver. And the cost can also be paid in steps, which makes you less risky (anti-fraud! If you are a liar, you will lose 50 yuan at most.
Some points to note:
1. That is to say, refining precious metals from e-waste is not as profiteering as many network technology sellers boast (I have seen people boasting dozens of times of profits! ), because most people who sell waste products are knowledgeable.
The situation of wasting resources varies from place to place, please have a general understanding first.