1. After the waste of electronic components is recycled, it is necessary to deal with it reasonably, because the electronics contain a large number of toxic elements, and the pollution to the environment is particularly large, which will seriously endanger people's health. Therefore, the disassembled batteries, capacitors, resistors, inductors and other electronic components are classified and stored, and the electronic components that can be used are preferentially sold as second-hand electronic products. Can not be used for crushing, extraction of precious metals.
2. The printed circuit board substrate is welded with various components, which are complex in composition, usually containing 30% plastic, 30% inert oxide and 40% metal.
3. Due to the complex structure of the circuit board, the fully automatic motherboard dismantling technology has not yet been formed. The current disassembly is mainly by manual operation, disassembly in accordance with the order from outside to inside, from large to small, from simple to complex, the main tools for disassembly are screwdriver, needle nose pliers, electric soldering iron and so on.
4. In hydrometallurgy, the waste circuit board is usually broken first and then gold leaching and gold extraction by different methods, and the commonly used crushing equipment is mainly hammer mill, hammer crusher, shredder and rotary crusher. Because the waste circuit board after the removal of components is mainly composed of reinforced resin plate and attached to the copper wire and other metals, high hardness, toughness, the use of cutting, cutting crushing equipment can achieve better dissociation effect, such as rotary crusher and shredder.