Selection Standards for Mining Vibrating Screens
| January 30th, 2018
Let’s picture engineering mathematics as the governing force that regulates mining vibratory screen capacity. In these engineering formulas, the screening media is shaped by the unique properties of the mined material. Factored along with the deck location and its orientation, key selection standards determine screen feed efficiency. The size of the material sifting apertures is important, obviously, but then there’s the geometry of those holes and a dozen other factors to determine.
Wire Mesh Standardisation
Square openings punctuate the screening panels in banks. They’re tightly arrayed so that the arriving high-volume aggregate is properly distributed across the screening panel. A quick look at a high-volume panel shows off the wire-mesh architecture. Again, a formula dictates the mesh size and layout. That by-the-numbers theorem uses the aperture dimensions, wire mesh count, and wire diameter to create a standard wire gauge product line, one that operates at the micron scale, all the way up to the centimetre range.
Resilient Engineering Plastics
Impact-resistant polyurethanes and synthetic rubbers add several additional factors to the selection standards ingredients list. First of all, a sheet plastic panel can vary its geometrical profile in ways that a woven wire mesh product cannot match. Rounded apertures slow the flow of the mined aggregate, for example, while targeting a desired aggregate type. Elongated cutouts further refine this intelligently implemented screening configuration. The increased plastic surface area also aids the dewatering phase of the operation, which represents a feature an open weave wire mesh can’t easily entertain.
Flexible Parameter Adaptations
An easy-maintenance screening deck switches out its aggregate-sieving panel without effort. No tools are required for the switch, so the mining process doesn’t suffer from maintenance downtime. That same quick swap routine optimises the filtering operation. For example, if the selection standards mandate a coarse mesh, then the already fitted fine mesh can be swapped out so that it accommodates the desired screening approach. Remember, this is a vibratory station, a type of equipment that alters its stroke length and stroke angle when required. If those changes to the vibratory mechanism are approved, an entirely different screening solution could be required to optimise the sorting process.
The last selection standard effector, therefore, is the actual equipment. The shape and mass of the mined material changes metal mesh screens into impact-resistant polyurethane panel, then there are aperture sizes and shapes to consider. But those flow-regulated changes must also accommodate the vibratory nature of the equipment. If the stroke length alters, know that a potential screening replacement strategy may also be in the cards.