CN101559405A - High-efficiency permanent-magnet drum magnetic separator - Google Patents

Abstract

The utility model provides a high-efficient permanent magnetism cylinder magnet separator, it is including frame, cell body, cylinder, magnetism system, scraper means, its technical essential is: the output end of the transmission control part is connected with the transmission shaft on the permanent magnet roller, the magnetic system is arranged on a fixed support on the inner side of the permanent magnet roller, the wrap angle of the magnetic system corresponding to the sorting belt is 120-140 degrees, the number of the magnetic poles is 7-12, the scraper device is arranged on a rack which is separated from the magnetic system and is close to the outer surface of the permanent magnet roller, and a back-flushing device for preventing ore pulp from precipitating is also arranged in the tank. The effective acting depth of the magnetic field in the magnetic system sweeping area can reach 110mm, the axial unit length processing energy of the permanent magnetic cylinder is large, and the recovery rate of magnetic minerals is high. The ore concentrate unloading adopts scraper unloading, and the water-saving effect is obvious compared with the traditional washing water unloading mode. And a rinsing device is arranged to wash the concentrate, so that the concentrate impurities are further removed. The structure also has the characteristics of good separation effect, high concentrate grade, simple structure, convenient maintenance, long service life and the like.

Description

High-efficiency permanent magnet drum magnetic separator

technical field

The invention relates to the technical field of mining equipment, in particular to a high-efficiency permanent magnet drum magnetic separator used for large-scale high-efficiency magnetic separation equipment for mineral processing.

Background technique

As we all know, magnetic separator is a common magnetic separation equipment for mineral processing plants. In recent years, the raw ore grade of large-scale mining of ore is getting lower and lower, and the particle size of mineral embedding is getting finer and finer. Due to the defects in the structure of the current permanent magnet magnetic separator, the separation effect of minerals after fine grinding is not good. At the same time, large-scale concentrators have exposed the problem of insufficient processing capacity of a single machine. Therefore, it will be more urgent to develop large-scale and efficient permanent magnetic separation equipment in the market.

Contents of the invention

The object of the present invention is to provide a high-efficiency permanent magnet drum type magnetic separator used in large-scale high-efficiency magnetic separation equipment for mineral processing.

The purpose of the present invention is achieved in that it includes a frame, a trough with a mine feeding device, a drum, a magnetic system, a scraper device, and a transmission control section, and is characterized in that: the output end of the transmission control section is connected to the permanent magnet The drive shafts on the drum are connected, and the magnetic system is set on the fixed bracket inside the permanent magnet drum. The wrapping angle of the magnetic system corresponding to the sorting belt is 120-140°, the number of magnetic poles is 7-12, and the scraper device It is installed on the frame away from the magnetic system and close to the outer surface of the permanent magnet drum, and a recoil ore device to prevent the sedimentation of the ore slurry is also installed in the tank.

The invention utilizes the magnetic field force generated by the permanent magnet system to adsorb the strong magnetic minerals in the minerals to the outer surface of the permanent magnet cylinder, and rotates with the cylinder skin. The outer surface of the skin is discharged out of the machine, and the non-magnetic materials that are not attracted are discharged from the tailings port to complete the sorting operation.

The permanent magnet magnetic system is the key of the present invention. In the magnetic system, the pole width of the magnetic pole group, the number of magnetic pole groups in the circumferential direction, and the magnetic wrap angle directly affect the selection index of the equipment itself. The magnetic wrap angle used in the present invention is between 120° and 140° Correspondingly, the length of the sorting belt can reach 1700-1800m, which is 40-50% longer than that of the traditional permanent magnet drum type magnetic separator with a maximum diameter of 1200mm. The number of magnetic poles in the direction is 7 to 14. The number of flips generated by the movement of magnetic minerals from one magnetic pole to the other increases, the inclusion of concentrates is significantly improved, and the grade of concentrates is higher; the width of the magnetic poles in the sweeping area is 255mm. The effective action depth of the magnetic field can reach 90-110mm, which is 60% higher than that of the traditional permanent magnet drum magnetic separator with the largest diameter of 1200mm. It can reach 110%, and the recovery rate of the equipment itself is also improved. The width of the magnetic poles in the conveying area and unloading area can be configured according to the characteristics of material fineness, such as 170mm, 130mm, and 100mm.

Traditional permanent magnetic drum type magnetic separators all use flushing water to unload ore, resulting in low concentration of concentrate, which causes great inconvenience to the subsequent process. The present invention adopts scraper to unload ore, without additional flushing water, and the concentration of concentrate is significantly improved , to achieve the effect of water saving and energy saving.

When the magnetic minerals are adsorbed to the surface of the cylinder, the inclusion of non-magnetic minerals is more obvious, which directly affects the concentrate index. After the magnetic minerals are separated from the pulp, increasing the water flow washing can effectively eliminate the inclusion of magnetic minerals.

The effective depth of the magnetic field in the magnetic system sweeping area can reach 100mm, the permanent magnet cylinder can handle large energy per axial unit length, and the recovery rate of magnetic minerals is high. Concentrate unloading adopts scraper unloading, which has a significant water-saving effect compared with the traditional flushing water unloading method. Set up a rinsing device to rinse the concentrate to further remove the inclusions of the concentrate. This machine has the characteristics of large processing energy (maximum axial unit length can reach 230m ³ /h·m), good separation effect, high concentrate grade, high recovery rate, water saving, simple structure, convenient maintenance and long service life. .

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention;

Explanation of the symbols of the main parts of the drawings

1. Transmission control part 2. Ore feeding device 3. Recoiling ore device 4. Tank body 5. Permanent magnet drum 6. Magnetic system 7. Rinse device 8. Scraper device 9. Rack 10. Ore discharge area

The invention will be described in further detail below through examples, but the following examples are only examples of the present invention, and do not represent the limited scope of protection of the present invention, and the scope of protection of the present invention is based on the claims.

Detailed ways

As shown in Figure 1, 9 in the figure is the frame, 6 is the magnetic system, and 1 is the transmission control part; a tank body 4 with a mine feeding device 2 is arranged on the frame 9, and a tank body 4 is provided with a The permanent magnet drum 5 with a diameter of 1500 mm and a length of 3000 mm to 5500 mm, the output end of the transmission control part 1 is connected with the transmission shaft on the permanent magnet drum 5, and the magnetic system 6 is arranged on the fixed bracket at the inner lower end of the permanent magnet drum 5 , the magnetic system wrap angle corresponding to the sorting belt of the magnetic system 6 on the lower side of the permanent magnet drum 5 is 120-140°, the number of magnetic poles is 7-12, the width of the magnetic poles in the sweeping area is 255mm, and the scraper device 8 It is installed on the frame that is separated from the magnetic system and close to the outer surface of the permanent magnet drum, and a recoil ore device 3 to prevent the sedimentation of the ore slurry is also installed in the tank.

The main structure of the present invention is: transmission control part 1 is made up of deceleration motor, sprocket pair. The ore feeding device 2 is made of seamless pipe welded horizontally and vertically. The bottom of the horizontal pipe is opened in the axial direction. The opening width meets the requirements of the slurry flow rate, and the slurry is evenly distributed to the axial direction of the permanent magnet cylinder. Recoil mine device 3 is composed of main water pipe and bend pipe to prevent ore slurry from settling. The tank body 4 is welded by austenitic stainless steel plates. The pulp flows in the tank body in a prescribed direction. The tank structure is different, and the pulp flow direction is different, and different sorting results are obtained. Different tanks can be configured according to different requirements of mineral processing, so as to meet its mineral processing requirements. The permanent magnet cylinder 5 is composed of a cylinder with a diameter of 1500mm and a length of 3000mm to 5500mm, and a magnetic system. The magnetic field generated by the magnetic system attracts the magnetic minerals to the surface of the cylinder and transports the magnetic minerals to the unloading area. The magnetic system 6 is composed of a yoke and a magnetic pole. The magnetic pole is divided into two types: a weak magnetic field and a medium magnetic field. ) composed of composite poles. The main function is to generate an uneven magnetic field, which adsorbs magnetic minerals to the outer surface of the cylinder, and completes the separation of magnetic minerals and non-magnetic minerals. The rinsing device 7 is welded by austenitic stainless steel pipes, and rinses the magnetic material after it leaves the water surface to reduce inclusions in the concentrate. The scraper device 8 is composed of a steel plate and a rubber plate, and the rubber plate is in contact with the cylinder to scrape off the materials transported there. Frame 9 is welded by section bar, is used for supporting and connecting above each parts. The ore unloading area 10 is welded by metal plates.

Its working principle is: when the equipment is running, the ore pulp enters the tank evenly through the ore feeding device along the axis of the cylinder, and under the action of the recoil ore device, the solid particles in the pulp will not sink to the bottom of the tank and remain in a suspended state. And overflow along the overflow weir of the tank body, the magnetic particles of the magnetic pole group in the magnetic system sweeping area are all adsorbed on the surface of the cylinder, the non-magnetic minerals are taken away with the overflow water, and the magnetic minerals are transported to the unloading area through the transportation area on the surface of the cylinder. Short turning, the inclusions during adsorption are removed, and the non-magnetic minerals included in the rinsing device are further removed when the concentrate is transported out of the pulp, and the concentrate is scraped off by the scraper when it is transported to the unloading area, and the concentration is higher high concentrate.

Claims (3)

1, a kind of high-efficiency permanent-magnet drum type magnetic separator, it includes frame, the cell body that has mine-feeding equipment, cylinder, magnetic system, screeding device, transmission control part, it is characterized in that: the output of transmission control part is connected with defeated moving axis on the permanent magnetic pulley, magnetic system is arranged on the fixed support of inboard of permanent magnetic pulley, and sorting and being with pairing magnetic is that cornerite is 120～140 °, and number of magnetic poles is 7～12, screeding device is arranged on and breaks away from magnetic system and the close frame of permanent magnetic pulley outer surface, also is provided with one and prevents the recoil ore deposit device that ore pulp precipitates in cell body.

2, high-efficiency permanent-magnet drum type magnetic separator according to claim 1 is characterized in that: with magnetic be corresponding and near after also being provided with a magnetic material on the position of permanent magnetic pulley outer surface to break away from the water surface to its rinsing device that washes.

3, high-weir type double spiral classifier according to claim 1 is characterized in that: it is 90～110mm that district's magnetic field useful effect degree of depth is scanned by magnetic system.

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