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Development of High-gradient Permanent Magnetic Separator with Inclined Cylinder and Its Application

Author: MiXiaXia
Tutor: WuXiQing
School: Central South University
Course: Mineral Processing Engineering
Keywords: Oblique ring Permanent High gradient magnetic separator Finite Element Analysis ANSYS software
CLC: TD457
Type: Master's thesis
Year: 2010
Downloads: 151
Quote: 2
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Abstract

High gradient magnetic separator is a magnetic separator new technology developed in the United States in the late sixties of the last century, to address the low-grade, fine grain size, the weak magnetism ore beneficiation, has opened up new avenues. With the continuous development of high gradient magnetic separation theory and equipment, its application has broken through the traditional object of magnetic separation, to enter the medical profession and the biosphere, and other fields. High gradient magnetic separation ring configuration, mainly flat ring and vertical ring configuration, in a kind of high-gradient magnetic separator, gravity of mineral particles are in the process of sorting competitive. With the development of rare earth permanent magnet materials and energy-saving needs, so that the magnetic separation devices tend to be permanent magnet. Developed a helical ring permanent high gradient magnetic separator, the main features of this machine are as follows: ① separation of the magnetic separator ring tilt configuration and inclination 0-90 °, speed 0-20r/min within adjustable. The sorting ring these characteristics can be changed in the process of sorting the the pulp fluid mechanics and gravity, gravity played a certain separation force effect in magnetic separation. ② The magnetic separator magnetic system for permanent semi-closed magnetic circuit magnetic system, magnetic wrap angle 125 °; iron yoke fixed magnet and played the role of magnetic permeability and reduce magnetic flux leakage, the magnetic field lines are mainly concentrated in sub-constituency. (3) of the magnetic separator drum drive a gear motor and rigid flange couplings; tilt angle adjustment device is the use of electric putter telescopic. The swash ring a separation process of the separator, micro-fine mineral particles the force interaction between the magnetic force, the fluid driving force, gravity, particle force (electrostatic force and van der Waals force). Sorting force is perpendicular to the magnetic and gravity ramps component competitiveness is mainly fluid driving force and the gravity force component parallel to the inclined surface; the interaction forces between the particles of the very fine particles (lt; 2μm) case only significantly. Hematite, quartz separation, for example, calculate the size of the various forces in the different particle size and inclination angle manner and under conditions of analysis of the ore particles to be captured. Hematite collector grain size decreased with the decrease of the inclination, increasing the speed swivel growth poly magnetic medium length and reduce the flow of the film thickness are conducive to the capture of mineral particles. Intensity magnetic separation tailings handling an iron in the magnetic separator TFe content of 17.92%, mainly in the red limonite and siderite weakly magnetic minerals, adjust the parameter is unique tilt angle of the magnetic separator ( 5-45 °) and the helical ring speed (4 ~ 20r/min). Magnetic concentrate grade is increased as the inclination angle increases, and reduces the rotational speed increases as the swash ring; recoveries decreased with the increase of the inclination angle, the swash ring speed there is an optimum value, then The recovery rate of the highest. The Magnetic Separator time concentrate grade of 33.18%, the recovery rate was 41.60%. Therefore, the the inclined ring magnetic separator magnetic tailings has certain practical effect. Shows that the test results and the design principle of the inclined ring magnet high gradient magnetic separator is consistent with the magnetic separator design is reasonable. Finite element analysis using ANSYS finite element analysis software on the the oblique the ring magnetic separator magnetic system and the poly-magnetic media, magnetic fields can intuitively understand the characteristics of the magnetic system and the magnetic field of the magnetic media in poly, poly magnetic media of different shapes and sizes The characteristics also conducted a comparative analysis. Can be analyzed by finite element simulation to optimize the design of the magnetic system of magnetic separator and poly magnetic media, to reduce equipment R \u0026 D costs.

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