(1) Structure The structure of this magnetic separator is shown in Fig. 1. 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.
Figure 1 SQC-6-2770 flat ring strong magnetic field magnetic separator
1- lower base; 2- large bevel gear; 3- inner iron core base; 4- core outer housing; 5,6 inner and outer core aluminum pad;
7-feeding device; 8-fine, medium mine cleaning device; 9-sorting ring; 10-coil; 11-iron core;
12-splash tank; 13-joint tank; 14-small bevel gear shaft; 15-coupling;
16-speed reducer; 17-pulley
The machine consists of a feeding device, a concentrate and a medium mine flushing device, a sorting and rotating ring, a magnetic system, a mining device, a transmission device, and a DC power supply.
Figure 2 SQC-6-2770 magnetic separator magnetic system
1-iron core; 2-coil; 3-yoke [next]
1 Magnetic system The magnetic structure of the machine is novel, as shown in Figure 2. It consists of inner and outer concentric annular yokes, radial cores and coils. 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 mm x 15 mm x 2 mm, each outer core coil 22 turns, the inner core coil 66 turns, and abuts 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 so as not to block the copper pipe, and the discharged cooling water can be comprehensively utilized. In short, the machine is characterized by compact structure, short magnetic circuit, less magnetic leakage, high magnetic field strength and low temperature rise.
The 2 sorting swivel consists of a ring body and a sorting medium (tooth plate). The entire sorting ring is divided into 79 sorting chambers by a non-magnetic separator. The single sorting chamber can avoid magnetic resonance and eliminate ring jitter. Each sorting chamber 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. There are 6 feeding points in the whole machine to form 6 sorting systems.
(2) Working process The 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 are discharged into the tailings trough below the sorting ring through the gap of the tooth plate under the action of gravity and slurry flow. When the sorting room is transferred to the middle mine cleaning position, a small amount of washing water is fed in, and the mixed gangue, continuous body and slime are washed into the tailings tank (the machine is not provided with a 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 washing area), the pressurized water is sprayed, and the weak magnetic ore sucked on the tooth plate is 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 Table 1.
Table 1 Technical characteristics of SQC-6-2770 flat ring magnetic separator
Sorting ring | magnetic pole logarithm | Highest field strength / (thousands / meter) | Feeding particle size upper limit / mm | Feed concentration /% | Production capacity / (ton / hour) | Water pressure (standard atmospheric pressure) | Power / kW | |||
Outer diameter / mm | Rotating speed/ (transfer / minute) | Flushing water | Cooling water | excitation | transmission | |||||
2770 | 2 to 5 | 6 | 1360 | 1 | 35 | 25~30 | (3~5)×10 5 | (3~5)×10 5 | 52 | 10 |
Note: 1 standard atmospheric pressure = 101.325kPa.
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