Method and apparatus for washing and grading sand and aggregate
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United States of America Patent
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Sep 3, 2019
Grant Date -
Aug 30, 2018
app pub date -
Feb 28, 2018
filing date -
Feb 28, 2017
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An apparatus for washing and grading sand and aggregate includes a first multi-deck screen and a sump for collecting undersize material from the plurality of decks. A first set of hydrocyclones receives undersize material and water from the sump of the first screen. A second screen has a deck for producing at least one sand product and a sump beneath the deck, the deck of the second screen receiving an underflow from each cyclone of the first set of hydrocyclones. A second set of hydrocyclones receives undersize material and water from the sump of the second vibratory screen. The deck of a third screen receives an underflow from each cyclone of the second set of hydrocyclones. A further hydrocyclone receives undersize material and water from the sump of the third screen, and an underflow from the further hydrocyclone is delivered onto the deck of the third screen.
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