When the waste circuit board is broken to recover metals such as copper, the remaining resin ring fiber powder is discarded at will. First, the electronic waste is disassembled until all the waste is used (including equipment and Technology). It can be mixed with plastic, reinforcing agent and other resin ring fiber powder to make glass plastic mixed particles. This glass plastic mixture can be used for the glass layer of the floor.
The recycling process of plastic recycling equipment mainly includes secondary crushing, electrostatic separation, metal recycling, non-metallic material recycling, etc. First, the rotary crusher and the impact rotary crusher are used to carry out primary crushing and secondary crushing to achieve the complete dissociation of metal and nonmetal, and then the roller corona electrostatic composite electric field high-voltage separator is used to separate the metal and nonmetal particles after crushing the waste circuit board. For the above machining process, the maximum monomer separation of various materials is the premise of efficient separation. The crushing degree of waste PCB not only affects the energy consumption of crusher, but also affects the subsequent sorting efficiency, so the crushing rate of crusher is a key link. PCB substrate has high hardness and toughness, and consumes a lot of grinding energy. During grinding, mechanical energy is converted into heat energy.
The recycling equipment and methods of waste circuit board include: crushing mechanism, including the purpose of crushing waste circuit board, one end to waste circuit board, and the other end to waste circuit board for discharging waste materials; The sorting mechanism is used to crush the crushed materials and transport them to the raw materials at the lower end, which are transported along the conveying route of the crushed materials and electromagnets; The mixing mechanism includes a feeding port for removing metal materials, a feeding port connected with the mixing chamber, and the outlet of the mixing chamber is located on the die head; Cutting machine, including intermittent cleaning knife and cutting motor driving cutting knife. The particles in the glass can be recycled after mixing.
The plastic recycling equipment of waste PCB mainly depends on the understanding of its material composition and structure. Therefore, it is very necessary to determine the composition and content of various substances in waste PCB from the qualitative and quantitative point of view. The base material of printed circuit board is generally glass reinforced phenolic resin or epoxy resin, on which are welded a variety of components, the composition is very complex, containing a variety of metals, and the value of resource plastic recycling equipment is high. Plastic recycling equipment is a complete process of splitting waste circuit boards into metal and non-metal. Electronic components are installed on the circuit boards. After tin removal and splitting, the components are removed, and the electronic components can be directly crushed and separated without splitting. Through coarse crushing, iron removal and fine crushing, the circuit board completes the separation of metal and non-metal, forms a mixture of metal and non-metal, enters the air flow specific gravity screen, and extracts most of the metal. The fiber powder obtained from the air specific gravity screen of the circuit board contains a small amount of fine metal. The remaining fine metal is extracted by the electrostatic separation device, and the extraction rate can reach 100%.