Stacker
（重定向自Boom stacker）
![Krupp coal stacker featuring tripper conveyor and non-slewing, luffing boom at RTCA Kestrel Mine](/Images/godic/202501/01/Krupp_stacker_rtca_kestrel_mine1204.jpg")
![Stacker at Garzweiler surface mine](/Images/godic/202501/01/-Tagebau_Garzweiler_-_Absetzer_Nr._755_in_Betrieb.webm1204.jpg")
A stacker is a large machine used in bulk material handling. Its function is to pile bulk material such as limestone, ores and cereals on to 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.