Zhengzhou Zhengyang Machinery Equipment Co., Ltd

Dry crushing and sorting process of circuit board recycling equipment

2020-09-01

At present, more domestically, the original method is used to dispose of waste circuit boards. For the rare or precious metal parts of the circuit boards, incineration or strong acid dissolution is used, that is, the precious metals are left after other components are removed. This process will produce a large amount of "three wastes". Because there are no environmental protection measures, it is quite harmful to the environment and workers, and these resources are not fully and effectively used. E-waste is a precious resource, and it is of great significance to strengthen the research and application of metal recycling technology for e-waste, both from an economic and environmental point of view. Due to the complex and diverse characteristics of e-waste, it is difficult to recover the metals in it with any technology alone. The future development trend of e-waste processing technology should be: industrialization of processing forms, greater resource recovery, and scientific processing technology . In summary, studying the recycling of discarded PCBs, Green Jie environmental protection circuit board recycling equipment can not only protect the environment, prevent pollution, but also facilitate the recycling of resources, save a lot of energy, and promote the sustainable development of the economy and society.


circuit board recycling equipment
 

Lujie Environmental Protection's new circuit board recycling equipment is a new equipment for the physical recycling of waste circuit boards. Aiming at the current situation of domestic disposal of used circuit boards, it improves the metal recycling rate and reduces the burden of environmental pollution. Lujie Environmental Protection has developed the recycling of waste circuit boards. The comprehensive treatment technology of metal green recycling adopts green and efficient crushing and sorting process to physically separate metals and non-metals in waste circuit boards to prevent environmental pollution caused by incineration and acid hydrolysis. Using all physical methods, optimizing the combined process of crushing-re-selection-electrical separation to achieve efficient circuit board crushing and effective separation of metals and non-metals. The combination of coarse crushing, medium crushing, grinding and screening and classification processes can greatly improve the grinding machine The efficiency of the grinding machine is reduced, and the effect of energy saving is achieved. At the same time, the life of key components of the crusher and grinder can be extended. Re-separation of metal and non-metallic metal powders containing impurities such as organic matter by the combined process of gravity separation and electric separation greatly reduces the organic matter content in the metal powder.

With the acceleration of the update of electronic products, the number of discarded printed circuit boards (PCB), the main component of electronic waste, is also increasing. The environmental pollution caused by waste PCBs has also aroused the attention of various countries. In the waste PCB, there are heavy metals such as lead, mercury, hexavalent chromium, including nearly 20 kinds of non-ferrous metals and rare metals. It has high recycling value and economic value, and it is a real mine waiting to be mined. The physical method of Lvjie environmental protection circuit board recycling equipment is to use mechanical means and the difference in PCB physical properties to achieve recycling. The green and efficient crushing and sorting process of waste circuit boards physically separates metals and non-metals in waste circuit boards and crushes The purpose is to dissociate the metal in the waste circuit board from the organic matter as much as possible to improve the separation efficiency. The study found that when broken at 0.6 mm, the metal can basically reach 100% dissociation.

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