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Krupp coal stacker featuring tripper conveyor and non-slewing, luffing boom at RTCA Kestrel Mine Stacker at Garzweiler surface mine. A stacker 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.
By 1934, production had started on the model 79 paver which featured a feeder conveyor to move the material to the auger. In 1936, the 879 model was introduced. By 1940, this machine was upgraded to the 879-A Model. This machine was the standard asphalt paver around the world until the mid-1950s.
A reclaimer is used principally in reclaiming processes. These processes can have low, medium, and high material flow rates. Reclaimers are made up of a bucket-wheel, a counterweight boom, and a rocker; they also use a conveyor system to move any material reclaimed from the boom to its specific pile.
A conveyor belt is the carrying medium of a belt conveyor system (often shortened to belt conveyor). A belt conveyor system is one of many types of conveyor systems.A belt conveyor system consists of two or more pulleys (sometimes referred to as drums), with a closed loop of carrying medium—the conveyor belt—that rotates about them.
Travelling, luffing boom stackers that straddle a feed conveyor are commonly used to create coal stockpiles. Tunnel conveyors can be fed by a continuous slot hopper or bunker beneath the stockpile to reclaim material. Front-end loaders and bulldozers can be used to push the coal into feeders.
The spreader's design can vary, ranging from conventional single-boom spreaders to more modified two-conveyor compact spreaders. The main parts of a spreader usually come in four signature parts. The first is the signature receiving boom with or without a support crawler track. The second is the main body superstructure itself.
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