Circuit board recycling equipment mechanical crushing electrostatic separation recycling line

Release Time：2022-12-11 Source：Lithium Battery Recycling Machine Share：

      How to produce a large number of printed circuit board production process and the old electronic circuit board generated by the recycling process has become a letter to be solved by the socialization of the problem. As the waste electronic circuit board contains metal and non-metal materials, including metal materials mainly by copper, gold, silver, etc., they have reuse value. The existing treatment methods are as follows: one is the chemical treatment method, which corrodes the non-metal and reacts the copper metal into copper sulfate; the other is the burning method, which burns the non-metal to extract the metal, and these two methods cause serious pollution to the environment.

     Xingmao Environmental Protection provides a process for processing and recycling metal and non-metal materials of electronic circuit boards using mechanical crushing and electrostatic separation according to the crushing characteristics of metal and non-metal materials. Another object of the present invention is to provide an equipment- circuit board recycling equipment used in the above process of treating and recycling metal and non-metal materials in waste electronic circuit boards.

        Circuit board recycling equipment is the main technical program: scrap electronic circuit board first sent to the powerful crusher for crushing into small pieces of material, and then sent to the magnetic separator to select the iron impurities sent to the crusher for crushing into small particles, and then sent to the fine crusher for crushing, where the crushing so that the metal from the original attached to the surface layer of non-metallic materials into a separate state, becoming a mixture of metal and non-metallic materials powder The mixed powder is separated from the non-metallic powder by the ultra-micro classifier, which accounts for 30-60% of the total amount, and is then entered into the high pressure electrostatic separator to separate the metal from the non-metal and become the finished product for recycling.

        The recycling process of mechanical crushing and electrostatic separation of used electronic circuit boards The equipment used includes strong crusher, magnetic separator, medium crusher, fine crusher, ultra-micro classifier, high pressure electrostatic separator, cyclone collector, pulse dust collector, high pressure induced draft fan.
 

 
        The working principle of the crusher is to crush the used 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 used electronic circuit board, so that the used electronic circuit board can be crushed into pieces smaller than 50mm×50mm.

        The role of the magnetic separator is to remove the iron impurities in the block material. The working principle of the magnetic separator is to suck the iron in the block material that flows continuously through the rotating magnetic drum, and the iron is collected after brushing down through the brush plate.

        The role of the crusher is to further crush the above block into granular material, the crusher is through the high-speed rotating knife and static knife impact on the block, shear into granular material; the 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 the requirements; the crusher belongs to the The supporting device of the medium crusher is mainly composed of cyclone collector, pulse dust collector and high pressure diverter.

        The main working principle is as follows: after the material is crushed by the crusher, it becomes a gas-solid dual stream under the action of the high-pressure induced fan, and 90-97% of the material enters the cyclone collector and is collected through the discharger and then enters the fine crusher, and the rest of the material enters the pulse dust collector and is collected through the discharger, and the clean air is discharged through the high-pressure induced fan. The role of the fine crusher described in the invention is to further crush the granular material into a particle size of less than 0.4mm powder, the fine crusher 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 make it crushed, and the separation of metal and non-metal; the crusher 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 it meets the requirements. The machine is equipped with built-in grading bar, return device will be greater than 0.4mm powder automatically back to the machine to continue to crush until it meets the requirements.

        The role of the super micro classifier is to make 30-60% of the non-metallic powder firstly separated through classification, the super micro classifier is to separate the non-metallic powder with particle size less than 0.15mm through the turbine classification effect of the high-speed rotating turbine classification wheel.

        The supporting device of the super micro classifier is mainly composed of cyclone collector, pulse dust collector and high pressure induced distributor, the main working principle is as follows: the material is crushed by the fine pulverizer and becomes gas-solid two streams under the action of high pressure induced fan, the non-metallic powder with particle size less than 0.15mm is separated by the classifying action of the super micro classifier and then enters the cyclone collector, about 90-97% of the material is collected through the discharger. The rest of the material enters the pulse dust collector and is 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 ultra-micro classifier.
 

 
        The function of high pressure electrostatic separator is to separate metal and non-metal materials, the working principle of this separator is: when the powder passes through the rotating drum and the corona electric field generated by the high pressure corona pole, due to the electric charge in the space, 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 conveying stirring. The scrap metal materials, which cannot be charged away but 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%.

        Circuit board recycling processing equipment due to the use of multi-layer combination of turbo-rotor type fine crusher, can make the metal and non-metallic material to get a good crushing dissociation; through the classification of the ultra-micro classifier, can remove the difficult to separate the ultra-fine non-metallic powder, reduce the processing volume of subsequent equipment; through the separation of high pressure electrostatic separator, can ensure good separation effect, the separation purity can reach more than 97%. The invention has the advantages of unique method, good recycling effect, low energy consumption, long service life of equipment, no secondary pollution, etc. It is an ideal method for physical recycling of waste electronic circuit boards at room temperature.

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