First, the construction of this magnetic separator is shown in the figure below. Which is characterized by the chain closed magnetic loop, a copper tube coiled, low voltage and high current excitation, the cooling water cooled cooling plate as tooth separation medium.
The machine consists of a feeding device, a concentrate and a medium mine flushing device, a sorting ring, and a magnetic system. It consists of a mining device, a transmission device, and a DC power supply.
Magnetic system: The magnetic structure of the machine is novel, see the figure below.
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It concentric annular inner and outer magnetic yokes, radial iron core and a coil. The main shaft is located at the center of the annular closed magnetic circuit, and no magnetic lines pass. The coil is wound from a square copper tube of 22 x 15 x 2 mm, each outer core coil 33 turns, the inner core coil 66 turns, and abuts against the pole. The heat dissipation of the coil adopts the water internal cooling method, which has the advantages of good cooling effect, low cost and no noise. In addition, since the copper tube is placed on the iron core having a high field strength, the water passes through the magnetic tube and becomes magnetized water without scaling. Therefore, the cooling water does not need to be softened, and only the impurities in the water are filtered out to avoid clogging the copper tube. The discharged cooling water can also be used comprehensively. In short, the machine is characterized by compact structure, short magnetic circuit, less magnetic leakage, high magnetic field strength and low temperature rise.
Sorting ring: It consists of ring body and sorting medium (tooth plate). The whole sorting ring is divided into 79 sorting chambers by non-magnetic separator. (Single sorting chamber can avoid magnetic resonance and eliminate ring jitter) Each sorting room has 2 single-sided tooth plates and 11 double-sided tooth plates. The tooth plates are separated by 2.5 mm thick non-magnetic stainless steel sheets to form 12 sorting gaps. The height of the tooth plate is 125 mm and the tooth angle is 110°. The composition can be pointed to the valley or pointed to the tip. 6 feeding points, composed of 6 sorting systems.
Second, the working process sorting swivel rotates slowly in the magnetic field. When the sorting chamber enters the magnetic field, the tooth plate is rapidly magnetized. At this time, the selected materials are respectively fed to the six sorting points by the slurry distributor, and the weak magnetic ore particles are sucked on the tooth plate and rotated with the sorting ring. The non-magnetic ore particles pass through the gap of the tooth plate under the action of gravity and slurry flow, and are discharged into the tailings trough in the lower part of the sorting ring.
When the sorting room is transferred to the middle mine cleaning position, a small amount of washing water is given to the person, and the mixed gangue, the raw body and the slime are washed into the tailings tank (the machine is not provided with the medium ore tank) to improve the quality of the concentrate. the goal of. When the sorting chamber is turned to a position where the magnetic field is weak (concentrate flushing area), the pressurized water is sprayed, and the weak magnetic mineral particles sucked on the tooth plate are flushed into the concentrate tank. The sorting chamber is then transferred to another magnetic field region of opposite polarity, and the sorting ring is rotated one revolution per revolution, wherein each sorting chamber is repeated six times.
SQC-6-2770 type strong magnetic separator has been used in the selection of limonite and hematite in Jiangxi Tiekeng Iron Mine, Hubei Daye Stone Mouth Copper Iron Ore, Daye Copper Mountain Copper Iron Ore Mine. The selection effect is good. The industrial test index for the separation of limonite is: the iron grade in the ore is 34.45%; after one rough selection and one sweep, the grade of iron concentrate is 50.29%; the iron recovery is 70.57%; the lower limit of effective recovery is 20 microns.
The machine can also be used for the removal of iron from kaolin (when iron minerals are mainly in the form of limonite or hematite).
The main technical characteristics of the aircraft are listed in the following table.
Technical characteristics of SQC-6-2770 flat ring magnetic separator | ||||||||||
Sorting ring | Magnetic pole pair | Highest field strength (thousands / meter) | Feeding particle size upper limit (mm) | Feed concentration ( % ) | Production capacity ( % ) | Water pressure (standard atmospheric pressure) | Power (kW) | |||
Outer diameter (mm) | Speed ​​(rev / min) | Flushing water | Cooling water | excitation | transmission | |||||
2770 | 2~5 | 6 | 1360 | 1 | 35 | 25~30 | ( 3~5 )× 10 5 | ( 3~5 )× 10 5 | 52 | 10 |
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