What can PCB recycling machine do?
Waste circuit boards (PCB) are slowly crushed, separated and finally screened by multiple processes of the equipment. When the metal and non-metallic materials crushed to a certain degree of fineness, metal and non-metallic materials are in a state of complete separation and then focused on sorting, in order to obtain the copper and resin powder inside, to achieve resource recovery and reuse.
How to recycle PCB?
1. electronic components removal
Many components on used circuit boards contain a variety of toxic and hazardous substances and heavy metals, and it is necessary to disassemble and separate these components before recycling resources from used circuit boards. On the other hand, the scrap circuit board disassembled under the part of the components also has a use value, many companies to recycle. The electronic components disassembly machine is used to disassemble the electronic components in the scrap circuit board, so that the substrate and electronic components to achieve a perfect separation.
Working principle: The disassembly mechanism includes a rotating shaft and a drum mounted on the rotating shaft, the drum rotates with the rotating shaft, the drum is set with a heating component, the heating component is heated by liquefied gas, the heating component is a heating nozzle, the said rotating shaft is a hollow structure, the heating nozzle is set inside the rotating shaft, the heating nozzle spray fire can control the temperature inside the drum at about 150℃, the tin on the circuit board is loosened by high temperature, with With the rotation of the drum, the circuit board and the cylinder wall collision friction, electronic components gradually fall off from the circuit board; drum cylinder wall is evenly set with holes, the electronic components off the small size, from the roller of the hole in the dump, the drum is set below the recycling box.
2. Crushing
After the PCB is dismantled, it will be crushed, crushing impact crushing, extrusion crushing and shear crushing methods. The more commonly used can be equipped with different twin-shaft shredder for shredding according to the size of the output, and then into the grinding mill for grinding. This can get a powdered metal mixture, to facilitate the next step of recycling sorting.
3. Sorting
The crushed material needs to be sorted according to the density of its individual components, particle size, magnetic conductivity, electrical conductivity and other characteristics, there are usually dry and wet sorting. Dry sorting including dry sieving, magnetic separation, electrostatic, density and eddy current sorting. Wet sorting has hydraulic cyclone classification, flotation, hydraulic shaking bed, etc.. The sorted material can then be reused. Usually we will use electrostatic sorting equipment for metal and sub-metal sorting, not only high efficiency, and sorting pure.
Circuit board electrostatic sorting recycling equipment is the use of material conductivity differences in the high-voltage corona electric field and high-voltage electrostatic electric field combined with a composite electric field, under the action of electric and mechanical forces to achieve the separation of materials. For the conductor to strengthen the electrostatic very attractive, for non-conductors to strengthen the repulsive force. In the sorting magnetic roller surface to produce high-frequency alternating strong magnetic field, when there is a conductive non-ferrous metal through the magnetic field, will be induced in the non-ferrous metal eddy current, this eddy current itself will produce the opposite direction of the original magnetic field, non-ferrous metal (such as copper, aluminum, etc.) will be due to the repulsive force of the magnetic field and along the direction of its transport leap forward, to achieve separation from other non-metallic substances, to achieve the purpose of sorting; its main The main differentiation criterion is the ratio of material conductivity and density, the ratio of high value than the ratio of low material easier to separate.
In a word, PCB recycling equipment can be used for systematic and efficient recycling and reuse of waste circuit boards, through disassembly, crushing, grinding, sorting, the copper and resin powder inside the precise separation, and then recycling. If you are interested or want to know more, please contact us for more information.
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