Magnetic Field Simulation and Force Characteristic Analysis of Low Intensity Magnetic Separation at the Stage of Magnetic Separation Column
In order to separate ultra-pure iron concentrate and qualified tailings in advance,the low intensity magnetic separation field at the magnetic separation column stage was optimized and designed by numerical simulation and conduct a sorting study.The rationality of separation was verified by force characteristic analysis.The results showed that the errors be-tween the simulated value and the theoretical and measured values are 1.40%～0.29%and 1.64%～0.09%,respectively.In order to ensure the accurate production of concentrate and mixed middling,the magnetic field current was selected as 2 A,and the maximum(minimum)radial magnetic field force(Hgrad H)was 3.11×108 A2/m3(7.57×107 A2/m3),the maximum(minimum)axial magnetic field force is 3.19×108 A2/m3(5.61×108 A2/m3).In order to ensure accurate separation of mid-dling ore and tailings,4 A and minimum radial(axial)magnetic field forces were selected as constant magnetic field and sweep magnetic field,respectively 1.54×109 A2/m3(1.44×1010 A2/m3),3.30×108 A2/m3(1.39×1010 A2/m3).By analyzing the force of particles,the radial(axial)magnetic field forces required for separation of concentrate(TFe grade is 70.09%),middling ore(TFe grade is 63.23%)and tailings(TFe grade is 9.40%)were determined to be controlled at 1.87×107～3.13×108 A2/m3(2.86×108～6.18×108 A2/m3),3.13×108～3.33×109 A2/m3(6.18×108～1.44×1010 A2/m3).The optimized low intensity magnetic separation process in the magnetic column stage theoretically achieves the purpose of synchronous sepa-ration of magnetite monomer,connected body and gangue,effectively improves the separation efficiency of magnetite,and pro-vides a new technical way for the efficient separation of magnetite ores.
NETL
NSTL
万方数据
