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Gold prospector pouring water through his rocker box, Pinos Altos, New Mexico (1940). Rocker box exhibit at Dahlonega Gold Museum. A rocker box (also known as a cradle or a big box) is a gold mining implement for separating alluvial placer gold from sand and gravel which was used in placer mining in the 19th century.
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. Gold dredges in Alaska had a stacker that was a fixed part of the dredge.
Scrap yards directories are also used by recyclers to find facilities in the US and Canada, allowing users to get in contact with yards. With resources online for recyclers to look at for scrapping tips, like websites, blogs, and search engines, scrapping is often referred to as a hand and labor-intensive job.
The Jeffrey Manufacturing Company, was an American industrial equipment manufacturing company, at one time the largest producer of coal cutting machines and mining locomotives in the world. It was established in 1878 as the Lechner Mining Machine Company, based in Columbus, Ohio , and is credited with producing America's first power-driven coal ...
At the salvage yard, the automobiles are typically arranged in rows, often stacked on top of one another. Some yards keep inventories in their offices, listing the usable parts in each car, as well as the car's location in the yard. Many yards have computerized inventory systems. About 75% of a vehicle can be recycled and used for other purposes.
Gold mining is the extraction of gold by mining. Historically, mining gold from alluvial deposits used manual separation processes, such as gold panning. The expansion of gold mining to ores that are not on the surface has led to more complex extraction processes such as pit mining and gold cyanidation. In the 20th and 21st centuries, most ...
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