Abstract
The results of the electric discharge crushing of PCB (printed circuit boards) to millimeter-sized fractions suitable for separation of the metal from the dielectric are presented. The crushing was performed on a high-voltage repetitively pulsed generator with varying the number of pulses. It was determined the dependences of the fractional composition of crushing products on the number of pulses in the cycle. Crushing products were studied for definition separation of metal from the dielectric with optical microscope. The results of the work confirm the possibility of electric discharge crushing various types of PCB, including fiberglass PCB with four layers.
 Keywords: high voltage fragmentation, waste printed circuit board, recycling
Highlights
Intensive inculcation of electronics in all sectors of the economy has caused a rapid increase quantity of electronic waste
This paper presents the results of crushing by an electric discharge method of various types of the PCB with summary information on the fractional and structural composition of the resulting material
An example of the appearance of the fraction after electric discharge crushing is shown in Figure. 4
Summary
Intensive inculcation of electronics in all sectors of the economy has caused a rapid increase quantity of electronic waste. In the methods, based on the mechanical crushing of PCB, obtain disintegrated crushed material, which is further separated on a vibrating stand, in air, magnetic, How to cite this article: V.M. Alexeenko, L.G. Ananieva, A.A. Zherlitsyn, S.S. Kondratiev, M.V. Korovkin, and O.V. Savinova, (2020), “Electric Discharge. Destruction of Wasted Printed Electronic Boards for Extraction of Metals” in IV Congress “Fundamental research and applied developing of recycling Page 156 and utilization processes of technogenic formations”, KnE Materials Science, pages 156–162. The material of the dielectric base and the number of layers determine the mechanical properties of the PCB and the energy consumption for crushing them. This paper presents the results of crushing by an electric discharge method of various types of the PCB with summary information on the fractional and structural composition of the resulting material
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