Sepor High Intensity Induced Roll Magnetic Separator MIH (13)
Model MIH(13) 111(5) High Intensity Dry Magnetic Separator
The Model MIH(13)111-5 is a TOP FED laboratory or pilot plant dry high intensity magnetic separator. It is designed to separate moderately or weakly magnetic (para-magnetic) materials from non-magnetic components. Results obtained from this small separator are scalable to predict performance by large production size high intensity magnetic separators. The top feed particle size recommended is 1 mm (18 mesh). The capacity of this separator is 100 kg/hour (assumes 1600 kg/m3 bulk density). The minimum sample size recommended is 10 grams.
MAGNETIC FIELD CONTROL
The MIH (13) incorporates a specially designed circuit utilizing electrical current to energize the field of the magnet. This field is variable from 0 up to 16,000 gauss. A digital ammeter is used to provide precise current to the coil and corresponding magnetic field strength.
Built-in design features and controls of this separator are well suited for mineralogical assay and research work on small samples and may also be used for production control and development. The complete separator unit is housed in an epoxy coated steel cabinet. The magnetic field pattern desired has been carefully maintained by the use of aluminum, stainless steel, brass, and special steel alloy components where they are required. A vibratory feeder is provided to introduce material to the separator at a constant feed rate. The standard feed hopper has a 1 liter capacity, but an optional 4.5 liter feed hopper is available.
The top fed induced roll separator places all materials in contact with the highest magnetic field at the zones of steepest magnetic gradient and utilizes magnetic force and gravity to capture weakly magnetic particles. A turning induced magnetic roll transports material through the active area and provides an opposing centrifugal force for separation of magnetic and nonmagnetic materials. This unit can withstand material feed temperatures up to 150 degrees C.
Monazite, Rare Earths
Wolframite From Scheelite
The separator operates from a 110-120 volt, 50/60 cycle, single phase alternating current power supply, drawing a maximum of 7 amperes. The direct current power required for operation of the separator is obtained from silicon rectifiers that are an integral part of this equipment. The separator is also available for operation on 230 volt single phase alternating current 50/60 cycle.
The rotor is driven by a direct current, flex-mounted one quarter horsepower TEFC motor. Rotor speed is variable from 0 to 300 RPM. The rotor has totally enclosed, self lubricated ball bearings.
The separating gap can be easily adjusted by movement of the free nose piece toward or away from the separating rotor.
Lift Type Separation
The separation of minerals in the magnetic field by the lift type action (which is employed in magnetic separators of the cross belt, ring and disc type) is performed by the induced roll machine. Lift type separation is sometimes preferred where minerals have small degrees of difference in their magnetic susceptibilities.
For general research work and mineral analysis, the separator has proven very useful. Many minerals may be identified by their magnetic behavior. Mineral samples may be split into magnetic and non-magnetic components prior to chemical analysis. In this manner, the chemical values may be attributed to particular components, magnetic or non-magnetic. By predetermining the chemical analysis of the magnetic fraction, an analysis of extracting and processing the magnetic or non-magnetic components may be more easily made. This method of production control many times yields more information as to identify and cause of impurity than can be gained by chemical analysis alone. The high intensity magnetic separator is also very useful in the preparation of a flowsheet design, since it is capable of processing up to 100 kg/hour, and results obtained are scalable to larger production machines.
For mineral separation studies, materials may be removed by experimenting with various magnetic force intensities, starting with 0 and increasing the magnetic field strength. The magnetic fractions, when graded in accordance with their respective magnetic susceptibility, can be very useful in determining the quantities of various minerals present in an ore. In addition, the laboratory separator can be used to train operators of the plant size production separators, since the results obtained from varying the operating conditions will produce similar results on the plant size induced roll magnetic separators.