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3 Oct 2016 PDF Bucketline gold dredges have existed for more than a century and in North America and the very high capital cost of large capacity machines. in cutting costs, adopting new ideas such as Caterpillar chains for the bucket, large bucket

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1911 Encyclopdia Britannica/Dredge and Dredging Wikisource

25 Dec 2012 The earliest record of a bucket ladder dredger is contained in the first The bucket chain was driven by two horses working a horsegear on the The construction of large steam dredgers is now carried on by many engineering firms. the bucket

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Dredging Wikipedia

Dredging is the operation of excavating material from a water environment sometimes . Harvesting materials: dredging sediment for elements like gold, diamonds or A heavy rectangular metal scoop is towed astern of a moving boat with a chain . A bucket dredg

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Dredging New World Encyclopedia

10 Oct 2017 Historically, dredging has been used for mining of gold and other valuable This dredger uses the Venturi effect of a concentrated highspeed A bucket dredger has a bucket dredge, which is a device that picks up They have the form of a scoo

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Gold dredge Wikipedia

A gold dredge is a placer mining machine that extracts gold from sand, gravel, and dirt using water and mechanical methods. The original gold dredges were large, multistory machines built in the first On large gold dredges, the buckets dump the material into a s

Bucket Line dredging: Historic Gold mining by mechanical methods

Bucket Line dredging: historic methods of working gold placers by machine. cubic yards daily, and the buckets each having a capacity of 16 cubic feet. medium of the plant is water, a boat or scow is necessary for this purpose. in which the ladder and buck

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