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Mar 21, 2017· Pulverizing electronic waste is green, clean and cold Researchers use cryomill to turn circuit boards into separated powders ... The researchers estimate that socalled ewaste .
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EWaste is Now GREEN, Clean Cold ... To test their technique, the team threw the printed circuit boards of computer mice into the cryomill. With the liquid nitrogen keeping the components at a constant, ultralow temperature, the device is shaken so the steel ball grinds the ewaste down over about three hours.
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Mar 22, 2017· Pulverizing ewaste is green, clean — and cold. ... The cryomill contained argon gas and a single toolgrade steel ball. A steady stream of liquid nitrogen kept the container at 154 kelvins ...
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