Circuit board recycling equipment mechanical crushing electrostatic separation process
Release Time：2022-12-11 Source：Battery Recycling Machine Share：
A method for mechanical crushing and recycling treatment of waste electronic circuit boards at room temperature, specifically a recycling treatment method for separating metal and scrap metal materials in waste electronic circuit boards by mechanical crushing and electrostatic separation. Circuit board recycling equipment crushing and sorting waste electronic circuit board mechanical crushing and electrostatic separation of the recycling process and the equipment used therein include powerful crusher, magnetic separator, medium crusher, fine crusher, super micro classifier, high pressure electrostatic separator. Scrap electronic circuit board mechanical crushing and electrostatic separation of the recycling process includes the scrap electronic circuit board crushing, iron removal and further crushing, and then fine crushing, through the ultra-micro classifier first part of the non-metal, sent to the high-voltage electrostatic separator for metal and non-metal separation of their respective finished products after recycling. Circuit board recycling equipment mechanical crushing waste electronic circuit board recycling process introduction.
Scrap electronic circuit boards are first sent to a powerful crusher for crushing into small pieces of material, and then sent to a magnetic separator to select the iron impurities sent to the crusher for crushing into small particles of material, and then sent to a fine crusher for crushing, where the crushing of the metal from the original attached to the non-metallic surface and become a separate state, becoming a mixture of metal and non-metallic powder, mixed powder through the ultra-micro classifier to account for The mixed powder is separated from the total amount of non-metallic powder by the ultra-micro classifier, which accounts for 30-60% of the total amount of non-metallic powder, and is fed into the high pressure electrostatic separator to separate the metal from the non-metal and become the finished product for recycling.
The equipment used in the recycling process of mechanical crushing and electrostatic separation of used electronic circuit boards includes powerful crusher, magnetic separator, medium crusher, fine crusher, super micro classifier, high pressure electrostatic separator, cyclone collector, pulse dust collector, and high pressure induced draft fan.
The working principle of the crusher is to crush the waste electronic circuit board into small pieces by shearing the dynamic knife on the active shaft, the dynamic knife on the driven shaft and the static knife on the driven shaft, which can crush the waste electronic circuit board into pieces of less than 50mm×50mm.
The function of the magnetic separator is to remove the iron impurities in the lump material. The working principle of the magnetic separator is that the iron in the lump material will be sucked by the rotating magnetic drum, and the iron will be collected after being brushed by the brush plate.
The role of the medium crusher is to further crush the above lump material into granular material, the medium crusher is through the high-speed rotating knife and static knife impact on the lump material, shear into granular material; the medium crusher through the configuration of 8 ~ 15mm aperture screen so that through the screening of granular material smaller than 8mm excluded from the machine, granular material larger than 8mm particles remain in the machine continue to be crushed until it meets the requirements; the medium crusher belongs to the supporting device The main working principle is as follows: after the material is crushed by the crusher, it becomes two streams of gas and solid under the action of high pressure induced fan. 90-97% of the material enters the cyclone collector and is collected by the discharger and then enters the fine crusher. The clean air is discharged through the high-pressure induced draft fan.
The role of the fine pulverizer is to further crush the granular material into a particle size of less than 0.4mm powder, the fine pulverizer is through the high-speed rotation of the multi-layer combination of turbine rotor pieces and stator on the granular material repeated impact, friction, shear to crush it, and the separation of metal and non-metal; the pulverizer is equipped with built-in classification bar, backflow device will be greater than 0.4mm powder automatically sent back to the machine to continue to crush, until the requirements. until it meets the requirements.
The role of the super micro classifier is to make 30-60% of the non-metallic powder firstly separated by grading, the super micro classifier is to separate the non-metallic powder with particle size less than 0.15mm by the turbine grading effect of the high-speed rotating turbine grading wheel, the speed of the turbine grading wheel is steplessly adjustable, and the metal content of the separated non-metallic material can be adjusted by adjusting the speed of the grading wheel. The main working principle is as follows: after the material is crushed by the fine pulverizer, it becomes a gas-solid dual stream under the action of the high-pressure induced fan, and the non-metallic powder with particle size less than 0.15mm is separated out by the grading action of the super micro classifier and then enters the cyclone collector, about 90-97% of the material is collected by the discharger, and the rest of the material enters the pulse dust collector and passes through the discharger. After entering the pulse dust collector, the remaining materials are collected through the discharger, and the clean air is discharged through the high pressure induced draft fan; the mixed powder with particle size greater than 0.15mm is discharged through the discharger under the super micro classifier.
The function of the high pressure electrostatic separator is to separate the powder from the non-metallic materials. The working principle of the separator is: when the powder passes through the rotating drum and the corona electric field generated by the high pressure corona pole, the metal materials get the electric charge immediately through the grounded drum and are collected by the centrifugal force and gravity force generated by the drum by falling in front of the drum and being sent out through the conveying stirring. The scrap metal materials, which cannot be charged and are adsorbed on the surface of the drum, are brought to the rear and brushed off by brushes, and then sent out by conveying and stirring to be collected; the middle part of the materials, which are not completely separated, are sent out by conveying and stirring and then sent by bucket elevator to the feed hopper for further separation. The separation purity of this separator can reach more than 97%.
Xingmao environmental protection circuit board recycling equipment uses a variety of special equipment, can make the metal and non-metal objects to get a good crushing dissociation, with a unique method, good recycling effect, low energy consumption, long service life of equipment, no secondary pollution and other advantages. A waste electronic circuit board crushing and recycling process, characterized by the processing of waste electronic circuit board is first crushed into a strong crusher block material, by the magnetic separator to remove iron into the crusher into granular material, granular material is sent to the fine crusher for crushing into a metal powder and non-metallic powder mixture; mixed powder through the ultra-micro classifier to divide the total amount of 30-60% of non-metallic powder, and then into the high pressure The mixed powder is separated from the non-metallic powder by the super micro classifier, which accounts for 30-60% of the total amount, and then enters the high pressure electrostatic separator to separate the metal from the non-metal and recycle.
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