The use of semi-steady mining technology does not dictate any particular form of excavation machine. Applicable items for feeding a cell crushing system may embrace:
(1) hydraulic shovels,
(2) massive entrance end loaders,
(3) medium-sized rope shovels,
(4) large rope shovels.
All of those types of tools are used to load cell in-pit crushing systems at various rates. Typically entrance end loaders are used for charges up to 2000 t/h (Caterpillar Handbook). In those cases the place higher capacity than this is required both a hydraulic shovel or a rope shovel could also be used.
Currently the largest cellular crushing machines in service are fed directly by large rope shovels (P&H 4100XPB). Large electric rope shovels supply important economies of scale. A single machine, able to a continuous capacity of up to 10 000 t/h, operating without alternative for the life of the mine, presents a pretty choice for large-scale operations. At the bounds of current standard machine operations, the one hundred tonne rope shovels are capable of mine an 18 m face (P&H 4100XPB). At 10 000 t/h, a mobile crushing machine of this dimension is readily able to mine up to 44 Mtpa (and not using a belt wagon) and possibly as much as 50 Mtpa with one.
Possibly more acceptable for operation in an iron ore operation, mid-sized electric rope shovels (roughly 60 tonnes/go of the P&H 2800XPB selection (P&H 2800XPB)) supply some economies of scale. A single such machine is able to as much as 5000 t/h. If you want to see more information on tool steel tubing (visit my web site) look into the web site. At the boundaries of current machine operations, the 60 tonne rope shovels are able to mine an 18 m face, but is perhaps more appropriately employed on a 9 or 10 m bench. Remote mining operations frequently utilise hydraulic shovels in lieu of electric rope shovels. Their selection often displays a need for his or her higher mobility and, since diesel powered machines are readily available, the absence of any requirement for electrical reticulation into the mine. Diesel hydraulic units do not have the capacity to shift a hundred tonnes of waste per dipper move and as such are not directly comparable to massive electric rope shovels, but they are a lovely different to the smaller rope shovels. The maximum extraction fee anticipated for this type of machine can be of the order of 4000 t/h.
Having considered types of loading equipment, it is vital to note that each the electric rope shovels and hydraulic shovels exhibit comparable life of mine capital value profiles. The hydraulic shovels are cheaper to buy, steel tubing but don’t have the same operational life and require extra frequent refurbishment or alternative.
For steel tubing smaller operations, massive entrance end loaders may load a cellular crusher hopper with out difficulty. An interesting risk can be two units working concurrently; though this presents potential manufacturing fee improvements over a single hydraulic shovel it does not offer any vital operational cost advantage.