A stockpile is a pile or storage location for bulk materials, forming part of the bulk material handling process.
8-508: Stockpiles are used in many different areas, such as in a port, refinery or manufacturing facility. The stockpile is normally created by a stacker . A reclaimer is used to recover the material. Stockpiles are normally stacked in stockyards in refineries, ports and mine sites. A simple stockpile is formed by machinery dumping coal into a pile, either from dump trucks, pushed into heaps with bulldozers or from conveyor booms. More controlled stockpiles are formed using stackers to form piles along
16-559: A central control system . Other than stacking, a stacker has three basic movements: The conveyor belts used in stackers may be made of fabric or metal wire, depending upon the material to be handled. They are driven by pulleys, which in turn are driven by DC motors . The motors and gear are coupled by fluid coupling . Most stackers are electrically powered by way of a trailing cable. There are basically two types of cable trailing: power cord rotating drum (PCRD) and control cable rotating drum (CCRD). Pendulum adjustments are made to ensure
24-412: A rail between stockpiles in the stockyard. A stacker can usually move in at least two directions: horizontally along the rail and vertically by luffing (raising and lowering) its boom. Luffing of the boom minimises dust by reducing the distance that material such as coal needs to fall to the top of the stockpile. The boom is luffed upwards as the height of the stockpile increases. Some stackers can rotate
32-487: Is a large machine used in bulk material handling . Its function is to pile bulk material such as limestone, ores, coal and cereals onto a stockpile . A reclaimer can be used to recover the material. Gold dredges in Alaska had a stacker that was a fixed part of the dredge. It carried over-size material to the tailings pile. Stackers are nominally rated for capacity in tonnes per hour (tph). They normally travel on
40-477: Is a monthly work program. We can calculate volume of a stockpile manually or by using different types of software. Calculating the volume of a stockpile manually does not require any software. Software used to calculate stockpile volumes can either be proprietary, such as Microsoft Excel and Autocad, or Libre, such as Libre Office Calc and OpenSCAD This industry -related article is a stub . You can help Misplaced Pages by expanding it . Stacker A stacker
48-408: The boom. This allows a single stacker to form two stockpiles, one on either side of the conveyor . Stackers are used to stack in different patterns, such as cone stacking and chevron stacking. Stacking in a single cone tends to cause size segregation, with coarser material moving out towards the base. In raw cone ply stacking, additional cones are added next to the first cone. In chevron stacking,
56-479: The length of a conveyor, and reclaimers to retrieve the coal when required for product loading, etc. Individuals may also choose to stockpile certain commodities (e.g. food, medical supplies), that they fear may not be available to purchase in the future. For example, in March 2019, one in ten British shoppers were reported to be stockpiling food prior to Brexit . In the construction field stockpile volume measurement
64-413: The stacker travels along the length of the stockpile adding layer upon layer of material. Stackers and reclaimers were originally manually controlled, with no means of remote control. Modern machines are typically semi-automatic or fully automated, with parameters remotely set. The control system used is typically a programmable logic controller , with a human-machine interface for display, connected to
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