April 24, 2015

There’s a basic premise in any production cycle, a truth that should be self-evident but can be lost in the complexities of many stages. The assertion being hinted at, is simply this: the primary input of a dynamic process dictates the efficiency of what occurs further downstream. The previous statement is a very apt way of describing the burden incurred by any high feed VGF stage. The vibrating grizzly feeder could in many ways be compared to the human digestion system. Try imagining how efficient digestion would be without the chewing action we employ to cut our food down into manageable chunks. The same principle applies to feeder mechanisms, with the metaphor finding application within the screening stage of this large scale system. In other words, if those chunks of mined detritus weren’t to be crushed to a governable size, the equipment conveying the aggregate to the terminating point of the mine or quarry would indeed suffer from severe indigestion.

In illustrating this input of abrasive rock and ore, we realize the importance of a high feed VGF. The grizzle feeder adopts a vibrating action to sort coarse matter before any crushing and screening begins. The high feed prefix is earned by widening the mechanism feed and adding additional levels to the design. This demanding capacity feature also implies the addition of toughened steel bars, sectioned parallel grizzly rods that avoid costly stoppage incidents by creating a stepping effect to improve initial scalping. Built to take a beating, these high feed mechanisms maintain a constant speed, keeping the flow consistent across punishing load changes. Not to be confused with the next stage of the process, the teeth of our metaphor, the crusher mechanism or impact crushing assembly comes next. This crushing action lays at the heart of any mining installation but would quickly be overwhelmed without the precisely regulated feed of the vibrating grizzly.

In determining the function of a high feed VGF, let’s not overlook the construction of the mechanism. Rock crushing plants and mining facilities adopt the same construction ethic here, which of a rugged, heavy-duty body with a talent for taking any impact without pause. The core of the assembly is defined by eccentric motion as established by dual electric motors and a series of gears mounted in a sealed oil bath that shields moving parts from motion-damaging grit. Typically assembled from two horizontal planes of open-end steel bars, the double-shaft chain of moving parts instigates the vibrating action, sending minerals, coal, raw quarried rock, or metal-laden rock onward to the crushers.

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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