This type of electric separator is developed for sorting non-conductor minerals, but the dielectric constants of the two minerals must be significantly different, so that the ore particles can obtain different charges after being rubbed; or The groove contacts the friction to obtain an electric charge. Figure 2 shows a multi-drum frictional electric separator. The negatively charged ore particles are sorted out through the first three drums to obtain coarse concentrate and discard the tailings. The charged electrode has a diameter of 25 mm and rotates counterclockwise at a speed of 75 rpm. The voltage of the charged electrode is 15 to 18 kV. The separated minerals then enter the second stage for sorting. Since contact with the drum charging tube (made of brass or stainless steel drum), and changing the electrode becomes negative, so that further selection, and further separated from the ore, high quality concentrate. According to practice, the sorting results of some minerals show that the effect is better. Its productivity is 1~2 tons/hour•m, and the treatment granularity is 1.7~0.1 mm. Third, the free fall type friction electric sorter This kind of electric sorter is a kind of sorting equipment which is suitable for the two minerals are non-conductors, but the dielectric constant is quite different, and it is a coarse mineral. It consists of two rows of metal tubes, which is then carried through the gear hinge rotates two rows of metal tube, and after the pipe the brush is mounted in a row so as to attract the brush ore particles. These machines are mainly used for construction,bridge, tower and other steel structure in the connection plate drilling,it can also be used for boiler, petrochemical, refrigeration and other industries tube sheet, baffle and flange drilling and milti-holes drilling in the falat plate, parts drilling. Cnc Machine Tools,Plate Steel Driller,Cnc Steel Plate Drill,Plate Drill Form Sunshine Jinan XingTian Sunshine CNC Machine Co.,Ltd , https://www.cncplate.de
1. Drum type friction electric separator
Before the material enters the frictional charge, it is heated to 120~200 °C, then enters into the ore tank to rub against each other and collide with the bottom of the tank to obtain positive and negative charges. The charged material is sent to a drum type triboelectric separator for sorting, and the static electrode used can be charged with a high voltage negative or positive. Figure 1 is a schematic diagram of the sorting of such an electric sorter. 
Fig.1 Schematic diagram of drum type friction electric separator
1. Frictional electrification to the ore tank; 2. Drum electrode (grounding); 3. Charged electrode (negative electricity);
4. With positive ore mining ore tank; 5. Negative electric ore mining tank 6. Medium mining tank
Figure 2 Multi-drum friction electric separator
1. drum (grounding pole); 2. positively charged electrode; 3. tailings; 4. medium mine; 5. concentrate [next]
Second, the chamber type friction electric separator
Such an electric sorter is a type of equipment that has been used in various industries in the country and has been developed into various models. The charging method of the ore particles is the same as that of the drum type in (1) above, and both are charged by friction before entering the sorting, except that the structure of the sorting device itself is different. Figure 3 is a simplified diagram of such a device. In the figure, A is a schematic diagram, B is a schematic diagram of an industrial two-stage chamber electric separator, and C is a two-stage three-combination use diagram. The types and parameters of various friction electric separators are listed in Table 1.
Figure 3 Schematic diagram of chamber friction electric separator
1. Vibration friction to the ore tank; 2. Guide to the mine bucket; 3, 4. Electrode; 5, 6, 7, 8;
9. Hoist; 10. Material to the inlet; 11. High-voltage power supply; 12. Gas inlet; 13. Gas discharge
The ore particles are charged by vibrating contact and friction with the ore tank, and then enter the mine bucket to ensure that the material can fall from the center position. Since the two kinds of ore particles each have a different symbol charge, after entering the electric field, the positively charged ore particles are sucked to the negative electrode, and the negatively charged ore particles are attracted to the positive electrode, and the trajectories of the two are significantly different, so that Separate, Figure 4 is a schematic diagram of its construction. If the ore that has been sucked onto the electrode does not fall into the lower bucket and is attracted to the electrode, then brush it with a brush when the electrode is turned to the rear position. It must be stated that this equipment is only suitable for processing relatively coarse materials (generally 40 to 60 mesh) and is not suitable for sorting fine particles. The theory and practice of its full selection can be illustrated in Figure 5. [next]
Figure 4 Schematic diagram of the free fall tube type electric separator
1. to the mining bucket; 2. upper spherical hinge support; 3. transmission; 4. tube electrode;
5. brush; 6. lower spherical hinge device; 7. mining bucket; 8. divider
Figure 5 Schematic diagram of the sorting process of the free fall type electric sorter
A. The materials are charged by contact; B. The materials are charged and enter the sorting machine;
C. charged ore particles are respectively attracted to the electrode; D. industrial production type equipment
Table 1 Â Various types of friction electric separator models and parameters
The main parameters
Test type
Industrial type
3
5
7
8
1. Production capacity, t/h
2. The maximum particle size of the mine, mm
3. Material heating temperature, °C
4. Electrode, m
long
high
5. Pole distance, mm
2.0
3
120
1.40
2.25
200~300
3.0
3
120
2.0
2.5
300
10.0
3
140
5.0
2.0
300
25.0
3
200
7.0
2.0
300~600
6. Processing electricity consumption per ton of ore, kW
7. Dimensions, length × width × height, m
8. Machine weight, t
0.125
2.5 × 2.4 × 1.2
5.8
0.2
5 × 3 × 9
8.8
0.75
6 × 3.2 × 3.6
10.3
0.9
8.5 × 5.6 × 21
44