| Comparing with the electromagnetic separator, permanent magnetic separator has some advantages such as simple structure, low energy consumption and so on. In industry, most of the low intensity magnetic electromagnetic separators have been replaced by permanent magnetic separator nowadays.High intensity permanent magnetic separator existed a series of problems, for instance, unreasonable magnetic field distribution in separation space and lower work capacity, so high intensity permanent magnetic electromagnetic separators remain primary in actual application. High intensity permanent magnetic separator performance is closely related to magnetic field distribution.The optimization design for high intensity permanent magnetic separator magnetic field distribution and improving the processing capacity per unit time and the separation effect are profitable to propel and accelerate high intensity permanent magnetic separator industrialization. This study is important for the development of permanent magnetic separator.The following aspects were studied and analyzed in this paper to optimize the magnetic field distribution of high intensity permanent magnetic separator developed by Professor Peng Huiqing.1) Tthe high intensity permanent magnetic separator structure and separation principle developed by Professor Peng Huiqing were introduced in the paper. The main factors that impact magnetic field distribution of tooth shape, half round, rectangular profile and plane pole were analyzed. Meanwhile, the problems of the application were also pointed out.2) The magnetic field distribution of semicircular, teeth shape and moment profile was studied with the complex variable function and other physical mathematical means. The calculation formula of separation space magnetic field intensity and magnetic force was obtained.3) The separation space magnetic field intensity and magnetic force numerical values was obtained by analyzing the separation space magnetic field intensity and magnetic force calculation formula with the mathematical calculation and analysis software Matlab. The calculation results were similar to the actual measured value compared with the measured value, and it shows that magnetic field intensity and magnetic force formula can correctly reflect the distribution of magnetic field in the separation space. The calculation and analysis software Matlab combined with complex function mathematical derivation, simplified the operation process of distribution of magnetic field, and laid the theoretical foundation for the numerical calculation of magnetic field distribution in magnetic separator.4) The calculation of magnetic field distribution under conditions of different structural parameters was processed with adjusting the teeth shape, semi-circular and serrate three poles on the size structure parameters through comparative analysis, the distribution of magnetic field optimization design. The results show that the magnetic force of the magnetic pole teeth shape high magnetic separator space. Combined with the technology requirement of mineral processing, sharp teeth-shaped pole to produce permanent disk type strong magnetic separator with the advantages of reasonable structure was adopted in this paper.5) The test research of new type high intensity permanent magnetic separator prototype of potash feldspar deforestation was applied. According to the character of the ore, the disk speed, slurry concentration, magnetic minerals of flushing water and magnetic separation time and other factors on the iron removal effect through orthogonal experiments and condition tests to explore the background magnetic field intensity. Under the optimum conditions, a grinding circuit and middling regrinding closed-circuit test was presented for obtaining a better effect of removing iron.Fe2O3content in ore decreased from0.52%to0.19%. The concentrate yield reached83.32%and the iron removal rate reached68.29%. The test results were compared with the original permanent disk type strong magnetic separator, which show that the new high intensity permanent magnetic separator classification index and iron removal effect is better.6) The advanced finite element analysis software ANSYS was used to analyze the tooth shape, half round, rectangular profile and plane distribution of the magnetic separator magnetic separation space formed by the magnetic field simulation. The microscopic distribution of magnetic field was changed into visible distribution of magnetic line of force, the magnetic flux density vector, and the magnetic induction intensity contour map. The simulation results through comparative analysis, to reveal the fundamental reason of tooth shape magnetic with high magnetic field. |
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