Study On The Technology Of Eddy Current Separation For Scrap Non-Ferrous Metal

With the rapid development of Chinese industry, the renewal speed of automobile and household appliances accelerates quickly, so the amount of scrap cars is growing quickly. The recycling and reusing technologies of scrap metal resources have become an important research field of the metal industry for sustainable development. But the development of scrap metal recycling industry in our country is severely restricted by outdated equipment and scarcity of sorting equipment. In order to improve our technical level of sorting and recycling equipment for scrap metal and the efficiency of metal recycling, eddy current separation sorting technology was researched in this paper.(1) Based on the analysis of eddy current generation and characteristics, this paper researches current situation of non-ferrous eddy current separation technology, combining with Maxwell's equations analyzes the separation principle of the eddy current separator, and offers the formulation of the magnetic roll Magnetic field intensity and the eddy force.(2)First, this paper creates a finite element model of the magnetic roller using the finite element analysis software COMSOL, to analyze the magnetic roll Magnetic field intensity and the eddy force. Then, this paper uses COMSOL and MATLAB together to simulate the process of eddy sorting, in order to calculate the distance of sorting. Finally, an eddy current separation simulation platform is built with MATLAB.(3) A method optimizing the structure parameters and working parameters of the belt-type eddy current separator is researched in this study. First, this paper studies the magnetic roll Magnetic field intensity and the sorting distance by conducting the experiment, and analyzes the influential factors of the sorting distance. Then, the working parameters of the eddy current separator is optimized by using the BP neural network. Finally, with the result of the finite element analysis, the structure of the separator is optimized.(4) Control system of the eddy current separator is designed using the Siemens PLC, integrating the optimized parameters, to improve the sorting effect of eddy current separator and increase applicability of the separator.