Physical and mechanical separation technology for circuit board recycling equipment
Release Time：2022-12-23 Source：Lithium battery recycling equipment Share：
The recycling of waste PCBs is based on the premise of sufficient understanding of their composition and structure. PCBs are complex and diverse, but their material composition is not very different, that is, containing a large number of ferrous metals, non-ferrous metals, precious metals and polymers. PCB substrates are usually glass fiber reinforced resin or epoxy resin, in the resin will generally add halogen-containing compounds flame retardants to prevent burning caused by short circuits. PCB substrates are covered with copper foil wire conductive lines, transistors, diodes, resistors, capacitors and integrated circuits composed of these components, these components contain a variety of metals, there is a high recycling value.
The increase in PCB production is bound to bring a large amount of waste material, and the recycling of waste PCBs will become the focus of attention. The article mainly introduces the problem of PCB recycling and treatment by mechanical-physical method. Mechanical-physical method is mainly through the physical method of electronic circuit board crushing, to achieve the dissociation of metal and non-metal, and then according to its physical properties of different sorting.
The recovery of metal in the waste circuit board is important, but the recycling of polymer can not be ignored. At present, the commonly used mechanical and physical methods.
1. Disassembly is the process of separating electronic components from the substrate. The main methods of disassembly are mechanical force, cutting method, heating and chemical method.
2. The purpose of crushing is to make the circuit board as fully as possible to dissociate the various materials monomer,
3. Sorting is the use of crushed metal and polymer powder in the density, electrical and magnetic properties of the physical properties of the different components to achieve separation.
Environmental protection circuit board recycling equipment physical and mechanical separation technology applied to the treatment of waste circuit boards is an emerging technology in recent years. Comprehensive view of existing technology, the use of crushing, screening, air classification, magnetic separation, electrical separation and other physical dry separation technology should be used as the current and future solutions to the problem of recycling of waste circuit boards. The recycling technology and high value-added application of waste circuit boards, the separated metal materials are reused in the manufacture of circuit boards, and the separated non-metal materials are filled with high performance modified plastics after special surface treatment and reused in the manufacture of high-grade electronic and home appliance products to realize the high value-added application of non-metal materials of waste circuit boards.