Method and apparatus for washing and separating plastics material
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United States of America Patent
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Nov 23, 2021
Grant Date -
Nov 21, 2019
app pub date -
Dec 20, 2017
filing date -
Dec 20, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for washing and separating pieces of plastics material from contaminating material that also includes metal elements includes a stirring device having a plurality of blades which are driven in a washing fluid to generate a turbulent stirring action to mechanically remove part of the contaminating material from the plastics material. The tilt of the blades and the rotation speed of the stirring device are chosen carefully to generate an upward thrusting action to maintain the plastics material with a specific weight that is greater than the specific weight of the fluid in a floating condition. The plastics material is retained inside the container for sufficient time to obtain a desired degree of purity and decontamination for the plastics material, after which it is evacuated by controlled overflow.
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