Magnetic System Analysis Of Wet High Intensity Permanent Magnetic Separator And Equipment Manufacture

In the decelopment of permanent magnet device, the magnet system design is the key point. They play an important role for analysis of magnetic device performance, structural parameters of magnetic system, magnetic properties, forces on magnetic particles and mechanical structure. There are not the best for weak magnetic minerals roughing, discarding useless mineral from tailings and removing iron from non-metallic minerals for general wet permanent magnetic separator. This paper proposed a new magnetic system structure to enhance the magnetic field intensity in the separation space. The research of magnetic system and structure optimization was based on multi-sublect. They contained magnetic material, complex function, magnetic filed simulation, mechanical design, FEM, system development and magnetic separation and so on. Theoretical research of magnetic field distribution of magnetic pole with symmetrical fillet angle and actual manufacture of the equipment had been completed. The research provided a theoretical basis and Shortened the development cycle for similar magnetic device development.Six aspects had been completed, which contained magnetic materials, theoretical calculation of magnetic system, magnetic field simulation, design and manufacture of equipment, development of simulation system and iron removal experiment.(1) Through comparative analysis of magnetic materials at home and abroad to study the different properties of hard and soft magnetic material, the choice of NdFeB permanent magnet material was decided to apply in the new wet high intensity permanent magnetic separator. The magnetic induction intensity is 0.5T, coercive force of magnetic induction is 808KA/m, intrinsic coercive force is 1740KA/m and magnetic energy product is 326-334KJ/m3. The high magnetic flux density, stable performance and affordable prices meet the design requirements of wet high intensity permanent magnetic separator.(2) The magnetic field distribution rule of magnetic pole with symmetrical fillet angle was gotten by analytical solution of complex variable function. Formula of magnetic field intensity was Magnetic field orientation was Mean while the magnetic flux distribution of magnetic pole with symmetrical fillet angle in air gap was drawn.(3) Advance finite element analysis software ANSYS was applied to simulate the static magnetic field of magnetic system with 2D and 3D model. The post processing results were gotten, such as magnetic line of force distribution, magnetic field intensity, magnetic induction intensity, magnetic induction intensity distribution in special path and magnetic induction intensity cutting of 3D model. Then parametric language APDL was compiled to get optimal design program which could simulate different construction, geometry size and material of magnetic system. The optimal construction and parameter of magnetic system was gotten through the comparative analysis of different plans. The magnetic induction intensity of magnetic pole with symmetrical fillet angle was get up to 2.31T in optimal simulation condition.(4) Testing machine of wet high intensity permanent magnetic separator had been designed and manufactured to measure magnetic field of magnetic disk and do mineral processing test. The whole machine of wet high intensity permanent magnetic separator had been designed and some main parts were in improved design to make burden distribution more even. They were feed box, pipe for washing mine and framework. Anti-abrasion coatings were stuck to the surface of engine body in order to extend its service life. Magnetic disk was designed in advance to increase the useful area. Magnetic induction intensity could get up to 2.25T when the distance between magnetic disks was 10mm. The magnetic disk and central axis were analyzed under the condition of maximum magnetic field force by using COSMOS. Simulation results demonstrated that the safety factor was up to 6.7. It achieved a higher safety factor and reliability and meeted the design requirements of mine equipment.(5) ANSYS 12.0 was done second development for permanent magnetic field simulation based on Visual Basic. And database software SQL Sever 2000 was applied to develop permanent magnetic field simulation system. Some main models was developed, such as material database, ANSYS simulation and data output. Through virtual optimization design of magnetic system, the efficiency of design and optimization was improved efficiency.(6) Wet high intensity permanent magnetic separator was applied to remove iron from potash feldspar. The results under optimal experimental conditions were shown that structure design of magnetic separator was reasonable, mineral processing and iron removal effect was well. Fe2O3 in ore was decreased from 0.52% to 0.17%. Production rate of concentrate was up to 84.61% , and iron removal rate was 72.34%.