Factors that Effect Dry Magnetic Separator Operation

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(Free-Press-Release.com) February 26, 2012 -- Now, let’Wet magnetic separators talk about these factors in detail.
(1) Feeding layer thickness. It is influenced by granularity and magnetic property of raw material. The layer thickness in processing coarse ore materials should be thicker than that in fine ore.Concentrator table The thickness can be about 1.5 times of maximum ore in coarse ore, 4 times of intermediate ore while 10 times of fine materials.

To low magnetic intensity material, the layer thickness should be thinner, Or it would cause lower recovery rate because the magnetic force of magnetic-particle locates in the lower strata cannot be sucked up under the pressure of upper materials.Flotation machine Therefore, feeding layer thickness could be thicker to higher magnetic intensity materials.

(2) Magnetic field intensity and working clearance. It is close related to the processed material particle size, magnetic level and operational requirements .Raw material millwhen the working gap is stable, the magnetic field intensity and working clearance between the magnetic poles is determined by the coil ampere turns, for which is not adjustable and we can only adjust the magnetic field strength by changing the size of excitation current . When the current is stable, changing working gap can not only change the strength of magnetic field, but also change the magnetic field gradient,Impact crushing machine reduce the gap magnetic field strength dramatically increase. Thus in general, it is reasonable to reduce working gap according to the particle size. As to fine concentration, we’d better enlarge the gap in order to increase the selectivity and improve the taste.China mobile crusher But simultaneously, what necessary is increasing the excitation current to ensure the strength of the magnetic field.

(3) Feeding speed. Feeding speed is in accordance with the speed of vibrating trough （or belt). Its speed determines the mechanical force that mineral particles are undertaking during which stay in magnetic field.China vibrating feeder The higher of feeding speed, the shorter of mineral particles stay in magnetic field. Mechanical forces that mineral particles undertake are main gravity and inertia force, in which, gravity is a constant, and the inertial force is proportional to the square of speed. Weak magnetic mineral grains get a little more magnetic force than gravity in magnetic field, therefore, due to the inertia force is increased, when speed exceeds a certain limit, the adsorption of magnetic force will be insufficient and cause recovery decreasing. Therefore, separating weak magnetic minerals should adopt a slower feeding speed than that of strong magnetic mineral.

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