Product Knowledge

Mineral high frequency screen

The mining and mineral processing industry uses screening for a variety of processing applications. For example, after mining the minerals, the material is transported to a primary crusher. Before crushing large boulder are scalped on a shaker with 0.25 in (6.4 mm) thick shielding screening. Further down stream after crushing the material can pass through screens with openings or slots that continue to become smaller. Finally, screening is used to make a final separation to produce salable product based on a grade or a size range.

A screening machine consists of a drive that induces vibration, a screen cloth that causes particle separation and a deck which holds the screen cloth and the drive and is the mode of transport for the vibration.

There are physical factors that make screening practical. For example, vibration, g force, bed density, and material shape all facilitate the rate or cut. Electrostatic forces can also hinder screening efficiency in way of water attraction causing sticking or plugging, or very dry material generate a charge that causes it to attract to the screen itself.

As with any industrial process there is a group of terms that identify and define what screening is. Terms like blinding, contamination, frequency, amplitude, and others describe the basic characteristics of screening, and those characteristics in turn shape the overall method of dry or wet screening.

In addition, the way a deck is vibrated differentiates screens. Different types of motion have their advantages and disadvantages. In addition cloth types also have their different properties that lead to advantages and disadvantages.

Finally, there are issues and problems associated with screening. Screen tearing, contamination, blinding, and dampening all affect screening efficiency.

High Frequency Mineral Screen Structure:

High frequency screen consists of vibration exciter; ore pulp distributor, screen frame, machine frame, suspension springs and sieve, etc. The high frequency mineral screen is mainly composed of vibrator, pulp distributor, screen frame, rack, suspension springs and sieve. Different from the general principle of screening equipment, the high frequency mineral screen adopts a high-frequency, on the one hand, it destrories the surface tension of the magma and the high speed oscillation of the fine materials on the screen surface, on the other hand, it accelerates the density of useful mineral and the sugregation effect, and therefore increases the probability.

High Frequency Ore Screen Features:

High efficiency, small amplitude and high frequency of screening; it differs from the conventional screens with breaking of the surface tension of pulp and small granularity high speed vibration on sieve cover and accelerates the separating of large-density useful mines and increase the contacting probability of the materials smaller than output granularity and the sieve pore. Therefore produce good condition and make the materials smaller than the output granularity, especially the big-density materials and pulp get through the sieve pore together.

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