Technologies and Engineering

Improvement of laminated matrices of polygradient electromagnetic separator

Purpose. Constructional improvement of lamellar matrix of polygradient electromagnetic separator, research of magnetic field distribution in working area of matrix and experimental determination of separator efficiency. Methodology. The finite element method implemented in module Magnet of Infolytica software package for analysis of magnetic field distribution in working area of matrix of electromagnetic separator was used. The distribution of magnetic field in a system that contains a current coil as a source of magnetic field is carried out in a three-dimensional formulation. The physical experiment for evaluation of extraction efficiency of ferromagnetic inclusions from loose medium was applied. Findings. An improved design of electromagnetic separator is proposed, for which a security document is received. It is shown that improved design provides a more uniform distribution of local areas of high intensity and heterogeneity of magnetic field in working volume of separator matrix in comparison with basic design. According to results of numerical-field analysis of magnetic field distribution by application of finite element method, it was set that due to constructional improvement of matrix the maximum value of magnetic induction in working interpolar gaps and inhomogeneity degree of magnetic field increased. The results of physical experiment showed that improved design of separator provides an increase of extraction efficiency of metal inclusions in comparison with basic design, first of all, at a low concentration of metal impurities in sample of bulk material. Originality. For improved design of electromagnetic separator, the distribution of magnetic field in magnetic circuit and working area of device is obtained, which made it possible to substantiate its advantages compared to basic version. Practical value. The numerical-field calculations of magnetic field distribution in magnetic circuit and working area of electromagnetic separator received further development, which made it possible to substantiate advantages of improved design of separator compared to basic version

electromagnetic separator, polygradient matrix, magnetic induction, extraction efficiency of ferromagnetic inclusions