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Keywords = WC soft scrap

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9 pages, 1951 KiB  
Article
A New Recycling Process for Tungsten Carbide Soft Scrap That Employs a Mechanochemical Reaction with Sodium Hydroxide
by Jaeryeong Lee, Suyun Kim and Byoungjin Kim
Metals 2017, 7(7), 230; https://doi.org/10.3390/met7070230 - 22 Jun 2017
Cited by 17 | Viewed by 8152
Abstract
WC soft scrap, including Co used as a binder, thermally oxidized at 600 °C, was subjected to grinding with NaOH in a mechanochemical reaction, followed by water leaching to establish an effective recycling process. Na2WO4 was synthesized through a mechanochemical [...] Read more.
WC soft scrap, including Co used as a binder, thermally oxidized at 600 °C, was subjected to grinding with NaOH in a mechanochemical reaction, followed by water leaching to establish an effective recycling process. Na2WO4 was synthesized through a mechanochemical (MC) reaction with oxidized scrap, and Na2CO3 was formed when the mixing ratio of NaOH increased. These as-synthesized compounds were water-soluble. When the weight ratio of soft scrap to NaOH was 1:0.5, 99.2% W was extracted by water leaching, while the extraction yield of Co was limited to 3.57% under the same conditions. Full article
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