gold trommel wash plant in china

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When a river channel is dredged, sand is suctioned from the riverbed with a large piece of equipment called a "dredge" and moved to a nearby plant to be washed and sorted. During dredging operations on a flood plainthe area of land along the river that is inundated during floodinga pit is dug. After groundwater fills the pit, a dredge floated on the water is used to remove sand from the bottom of the pit. Many small lakes in Kansas flood plains, especially near the Arkansas River, were dug as sand pits. In dry pit mining of sand and gravel, the sediment is removed from an excavation pit with front-end loaders and loaded into trucks