October 16, 2014

In visualizing the processing stages of a mining operation, consider the real estate of an underground mine. The excavation is a mass of large rocks and coarse aggregate. Sorting what is essentially rubble within this limited space takes intense planning and an engineering strategy, one designed to convey the raw matter to the surface while simultaneously sorting and grading the material into waste and categorized ore. The scalping stage is key in this process. It’s located back at the primary intake zone. First comes the rock and ore, fresh from the mine seam, then the scalping screens take the huge slabs of rocky discharge directly from the mine, sorting that heavy burden of matter to remove contamination that will slow productivity.

Although the scalping process is on the front-line of the action, a heavy-duty crusher is typically placed in front of this coarse screening stage to deal with unmanageable rocks, grinding them down to a size the high-capacity screens can handle. And this is the core function of scalping, to manage debris on a scale that would defeat screens several sections down this complex industrial assembly. There’s one thing that becomes apparent from this intricate process, and that’s the realization that heavy industry can be just as exacting and complex in utilization as any small process. This heavy-industry sorting process depends on scalping to reduce huge sections of raw matter, and the partnership with the primary crusher ensures the process is always feasible. In fact, some mining configurations use a closed-circuit system at this point, sending broken matter from the primary crusher onto the scalping screens, then onto a secondary crusher before returning the flow back to the screens. The cyclical process continues until the scalping screens reduce the ore and matter to a set size and contaminants have been removed.

Manganese steel crushing jaws and eccentrically mounted gyratory crushers combine with dual-deck scalping screen mechanisms in a harmonious flow of material, and this working formula is the bedrock of mining operations, the primary stage that bridges the mine face and the feeder assemblies that eventually convey categorized ore to the surface. High-impact rubber and specially formulated polyethylene components are used in production scalping environments. The panels are expertly fabricated from large surface area sheets backed by reinforced steel plate. The grading openings on the sheet support this heavy-duty aspect by starting at 2″ in width and moving upward in size to cope with the abrasion and impact associated with raw chunks of rock. Applications that deserve an honorary mention include primary stage mining, the initial sorting phase of a recycling plant, quarry operations, and any type of screening that involves a crusher.

For managing granite, rock, and recycled matter in excess of one ton, a dual-deck scalping screen is the preferred solution. Made from vulcanized rubber and tough polyethylene, these screens are low-maintenance, low-cost snap-in or bolt-down sorting solutions on which the many conveyor belt systems and further screening solutions depend upon for an efficient and cost-effective work solution.

Screening Technology Pty Ltd T/AS Hawk Machinery

Address: 7 Lantana St Blackburn North Vic 3130
Contact Person: Bohdan Blaszczyk
Phone: +61 3 9877 7777
Fax: +61 3 9877 8177
Mobile: 0411 099 989

Email: info@hawkmachinery.com.au

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