Circuit board recycling Machine dry physical method processing process
Release Time：2022-12-28 Source：Lithium battery recycling equipment Share：
The hazards of waste circuit boards and their resource utilization value, circuit board recycling equipment physical recycling process can be used in the key technologies, such as disassembly technology, crushing technology, sorting technology, in order to achieve the recycling of resources and effective protection of the environment. Environmentally friendly circuit board recycling equipment dry physical methods to deal with waste circuit boards in the process should pay attention to the following issues.
1. By the conveyor to send the circuit board into the shredding crushing machine; the circuit board for shredding to 3 cm, and then directly into the crusher, crushed particles to 0.5 cm, and then sent by the feeding screw into the three-stage crusher for crushing; crusher belongs to the integrated water-cooled crushing, in the case of ensuring the normal temperature of the machine, the mesh to 30 mesh; crusher comes with a grading sifter, in the process of crushing Meet the requirements of the mesh of the circuit board powder into the next link, not up to the requirements of the cycle again.
2. circuit board powder into the next link wind specific gravity separator, according to the specific gravity of copper powder and resin fiber powder for primary separation, can be separated out of about 70% of the metal powder; specific gravity separator separated out of the powder and the upper extraction of the powder into the pulse dust collector, pulse dust collector unloading the powder contains a small amount of copper powder, and then sent by the wind feeder into the high-voltage electrostatic separation equipment for the next step of separation.
Circuit board through the circuit board recycling equipment coarse crushing, iron removal, fine crushing to complete the dissociation of metal and non-metal, the formation of a mixture of metal and non-metal, into the airflow specific gravity sieve, most of the metal extracted. Airflow specific gravity sieve out of the circuit board fiber powder contains a small amount of fine metal, and then into the electrostatic sorting machine, the remaining fine metal extraction, to achieve a large metal recovery rate.
The recycling of waste circuit boards relies heavily on the knowledge of their material composition and structure, so it is necessary to determine the composition and content of various substances on the waste circuit boards from a qualitative and quantitative point of view. The substrate material of printed circuit boards is usually glass fiber reinforced phenolic resin or epoxy resin, on which various components are welded, and the composition is very complex, containing a variety of metals, which have a high resource recovery value. Circuit board recycling equipment is the end-of-life circuit board disassembly decomposition and separation into a set of metal and non-metal process, with electronic components of the circuit board, and then after the detinning, disassembly, to remove the components, not through the disassembly of electronic components can also be directly crushed and separated.