Since gems and heavy metals like gold are considerably more dense than sand, they tend to accumulate at the base of placer deposits.Placer mining is the operation of mining the precious metal deposits (particularly gold and gemstones) found in alluvial deposits, deposits of sand and gravel in modern or ancient stream beds, or occasionally glacial deposits. The metal or gemstones, having been moved by stream flow from an original source such as a vein, is typically only a minuscule portion of the total deposit.
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The result is equivalent to several traditional spiral classifier series work, improving the classification efficiency. It can do the repeated classification.First is the novel multi segment cone spiral classifier. For this type of multi stage conical spiral classifier, the operation parameters of each grading chamber can be regulated independently. The novel multi segment cone spiral classifier has a big change in structure on the basis of the traditional spiral classifier.
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