The commonly used mine vibrating screen is not a kind of screening equipment, but a kind. Usually, there are inertial vibrating screens, self-centering vibrating screens, eccentric vibrating screens, heavy-duty vibrating screens, circular vibrating screens, linear vibrating screens, etc. Below we focus on comparing the characteristics of these types of vibrating screens.
The vibrator is installed on the screen box. As the screen box vibrates up and down, the instability of the amount of ore will affect the screening efficiency, and the processing capacity is small, which is suitable for medium and fine grades.
When the self-centering vibrating screen (single shaft vibrating screen) is working, the screen vibrates at high speed, but the spatial position of the grooved pulley remains unchanged, so it is called a self-centering vibrating screen. It has the same working principle as the pure inertial vibrating screen, but the belt wheel is concentric with the drive shaft in the structure, the center of the belt wheel remains stationary during the working process, and the motor runs smoothly.
The advantages are simple structure, easy manufacturing, strong screen surface vibration, and high screening efficiency. The disadvantage is that the building produces greater vibration and less processing capacity. Applies to the subdivision level.
The eccentric vibrating screen relies on the high-speed rotation of the eccentric drive shaft to make the screen vibrate, so it is called the eccentric vibrating screen. The eccentric shaft directly drives the screen frame to make a trajectory movement in the vertical plane with an amplitude equivalent to twice the eccentricity. The sieve size can reach 100~250mm. It is often used in the pre-screening process or the first screening process of sand and gravel materials. It is rarely used now, and inertial vibrating screens are mostly used.
The advantage is that the structure is sturdy, the amplitude remains the same when the feed volume changes and the vibration strength is large and constant, and it is not suitable to block the screen holes.
The disadvantage is that the bearing structure is complex, the inertia is large, and the building is likely to vibrate at the same time due to incomplete balance during work.
It is suitable for sieving large lumps and dense ore. The screening efficiency is higher than that of a fixed screen, but the equipment investment is high, and it is suitable for large block classification.
The vibrating screen with a circular track, the screen surface is arranged obliquely, the material stuck in the screen hole can jump out, the screen surface is not easy to be blocked, and it is suitable for large blocks and medium subdivision levels.
The screen surface is installed horizontally, the movement track is straight, the screen surface is large, the amplitude is strong, the screening efficiency is high, and the processing capacity is large. However, the structure is complicated, the price is expensive, the energy is high, and the amplitude adjustment is difficult. It is suitable for the screening of coarse, medium, and fine aggregates, and can also be used as dehydration and desliming equipment in wet production.
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