IMPROVEMENT OF LAMINATED MATRICES OF POLYGRADIENT ELECTROMAGNETIC SEPARATOR

Abstract

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.  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.