Analysis Of The Flow Field And Magnetic Field In The Separation Chamber Of A Dry Permanent Magnet Drum Separator

Dry permanent magnet drum-type magnetic separator is an important part of iron powder dry separator.The magnetic field characteristic parameters,gas-solid two-phase flow characteristic parameters and structure parameters of the separator are the important factors affecting the performance and grade of the magnetic separator.It is of great significance to study the characteristics of magnetic field and gas-solid flow in the separation chamber of a dry permanent magnet drum separator to improve the separation performance and grade of the magnetic separator in the dry separation process.Therefore,this article adopts the method of combining the numerical simulation and bench test of magnetic separator magnetic induction intensity distribution was studied,and the separation chamber,a mathematics model of the magnetic induction intensity distribution in the magnetic field and the magnetic separator separation cavity-gas-solid two-phase flow field of the coupling field and air supply system of single phase flow field numerical simulation analysis,to explore and improve the magnetic separator separation performance ways of sorting grade,provide theoretical support for optimal design of magnetic separator.The work carried out mainly includes:(1)Study on magnetic field characteristics of dry permanent magnet drum separator.Through the numerical simulation analysis of magnetic induction intensity of the magnetic system of the dry permanent magnet drum separator by using ANSYS Maxwell 2D software,and the statistical analysis of its distribution law by using MATLAB,the mathematical model of magnetic induction intensity distribution law of the magnetic separator is obtained,which provides theoretical basis for the coupling analysis of magnetic field and gas-solid twophase flow field.(2)Coupling analysis of magnetic field and gas-solid flow field in magnetic separator.To establish finite element model of the magnetic separator separation chamber and the magnetic separator magnetic induction intensity distribution mathematical model of the load to the ANSYS fluent software,and of the separation chamber gas solid two phase flow numerical simulation analysis,get the magnetic-coupling flow field simulation results and analysis of the magnetic field parameters,the gas-solid two phase flow field characteristic parameters and thestructural parameters of separation chamber and the influence law of magnetic separator separation chamber between the concentration of export,and provide theoretical basis for optimal design of magnetic separator.(3)Numerical simulation analysis of gas-solid two-phase flow field in separation chamber and design of improved structure of air supply device.The gas-solid two-phase flow field in the separation chamber was numerically analyzed with the parameters of air supply velocity,air inlet Angle and air chamber structure,and the influence rules of these parameters on the characteristics of the flow field were obtained,which provided a theoretical basis for the structural design of the air supply device.(4)Experimental study on magnetic separators.In order to verify the influence of the air supply system on the thickness of the material layer in the separation chamber,the separation efficiency and grade of the magnetic separator,the separation test method was carried out on the three-stage dry permanent magnet drum magnetic separator test bed developed by the research group,and the results were consistent with the numerical analysis.This research method and conclusion provide a theoretical basis for exploring the movement rules of mineral particles and the optimal design of magnetic separator,and play a positive role in promoting the technological progress of mineral processing industry.