Bridge Scraper Reclaimer | General overview | Practical view | Part description and functioning;
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A Reclaimer is a large machine used in bulk material handling applications. A reclaimer's function is to recover bulk material such as ores like lime stone, coal, Laterite, etc and cereals from a stockpile. A stacker is used to stack the material.
Reclaimers are volumetric machines and are rated in m3/h (cubic meters per hour) for capacity, which is often converted to t/h (tonnes per hour) based on the average bulk density of the material being reclaimed. Reclaimers normally travel on a rail between stockpiles in the stockyard. A bucket wheel reclaimer can typically move in three directions: horizontally along the rail; vertically by "luffing" its boom and rotationally by slewing its boom. Reclaimers are generally electrically powered by means of a trailing cable.
Bucket wheel reclaimers use "bucket wheels" for removing material from the pile they are reclaiming. Scraper reclaimers use a series of scrapers on a chain to reclaim the material.
The reclaimer structure can be of a number of types, including portal and bridge. Reclaimers are named according to this type, such as "Bridge reclaimer". Portal and bridge reclaimers can both use either bucket wheels or scrapers to reclaim the product. Bridge type reclaimers blend the stacked product as it is reclaimed.
Reclaimer applications:
A reclaimer is used for reclaiming applications, these applications can have low, medium, and high material flow rates. These machines are made up of a bucket-wheel, a counterweight boom, and a rocker. A reclaimer uses a conveyor system to move any material reclaimed from the boom to its specific pile. When the reclaiming load rate is high or a longer boom is required, the machine is assembled differently to accommodate for the larger load and flow rate. In the event of high material flow rate a combination of a boom and bucket wheel is used.
Control systems:
Stackers and Reclaimers were originally manually controlled manned machines with no remote control. Modern machines are typically fully automated with their parameters (for stacking or reclaiming) remotely set. Some older reclaimers may still be manually controlled, as reclaiming is more difficult to automate than stacking because the automatic detection of pile edges is complicated by different environmental conditions and different bulk materials.
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