The transmission is a mechanical-hydraulic composite system. As shown in FIG. 11, the piston reciprocates the piston of the active cylinder, and the moving cone of the jig is driven up and down by the driven cylinder. When the moving cone is lowered, the kinetic energy of the water flow, ore and cone in the jigging chamber is absorbed by the high-pressure accumulator (the accumulator has a high-pressure nitrogen-filled skin made of nitrile rubber), and when the moving cone rises, it is stored. The expansion of the compressed gas in the energy device acts as a pusher, so the energy can be reused. The newly added mechanical energy is mainly used to compensate the friction loss during the movement. The energy consumption of the equipment is very small, only 1/3 of the general diaphragm jig according to the unit sieve surface. The function of the low-pressure accumulator in the system is to supplement the hydraulic circuit oil leakage during normal operation to maintain system pressure stability.
The jigging cycle curve is determined by the outer contour of the cam, and the ideal motion curve is a sawtooth waveform (see Figure 12 above). This curve is well suited to the requirement of quickly lifting the bed up and down slowly. The effective loose period is long, and the relative speed during the stratification is small, so the unit screen surface treatment capacity can be greatly improved, the particle size recovery lower limit can be reduced, and the water consumption can be reduced. Lean gold ore sand, when the feed size of less than 25 mm; classification may not be selected. A 9-chamber jig with a handling capacity of 135 m3 /h (220 t/h) and a lower particle size recovery limit of 0.05 mm. The amount of water added per ton of ore is only 1.2 m3 , which is 70-80% less than that of a conventional diaphragm jig. [next]
Round Jig in our country generally installed in placer gold mining ship for roughing, also used for sorting foreign diamond, tin, tungsten and hematite ore. When selecting the gold mine, the steel ball is used as the artificial bed stone and the sieve is discharged. Table 5 shows the technical indicators for the treatment of alluvial sand deposits in the valley of the Hunchun Gold Mine.
e JT-5 sawtooth trapezoidal jig The upper surface of the machine is trapezoidal, two chambers in series, with a total area of ​​5 m 2 . The two cones below the jigging room are supported on a beam. The characteristic of the transmission is that the cam is used to push the beam up and down through the lever to realize the water flow pulsation. The outer contour line of the cam makes the displacement curve of the water flow have a sawtooth waveform, so the same water saving, energy saving and sorting as the circular jig can be obtained. High efficiency and other advantages. The screen area of ​​the second chamber is larger than that of the first chamber, and the diaphragm area is equal (the medium diameter is 1.247 meters), so the water velocity of the second chamber is reduced, which is favorable for recovering fine heavy minerals.
The device is equipped with two types of cams with a nominal stroke of 15 mm and 20 mm. The transmission uranium also has an eccentricity of 10 mm, so the center of rotation of the cam is not the manufacturing center. Adjust the mounting angle of the cam and the stroke will change as shown in Table 6. The technical performance of the equipment is listed in Table 7.
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