High Purity Tungsten Spherical Particle Preparation From WC-Co Spent Hard Scrap

• Autorzy: Han C. , Na H. , Choi H. , Kim Y.

Identyfikatory

DOI

10.1515/amm-2015-0162

Warianty tytułu

PL

Wytwarzanie wysokiej czystości sferycznych cząstek wolframu z twardego złomu WC-Co

• Języki publikacji: EN

Abstrakty

EN

Tungsten carbide-cobalt hard metal scrap was recycled to obtain high purity spherical tungsten powder by a combined hydrometallurgy and physical metallurgy pathway. Selective leaching of tungsten element from hard metal scrap occurs at solid / liquid interface and therefore enlargement of effective surface area is advantageous. Linear oxidation behavior of Tungsten carbide-cobalt and the oxidized scrap is friable to be pulverized by milling process. In this regard, isothermally oxidized Tungsten carbide-cobalt hard metal scrap was mechanically broken into particles and then tungsten trioxide particle was recovered by hydrometallurgical method. Recovered tungsten trioxide was reduced to tungsten particle in a hydrogen environment. After that, tungsten particle was melted and solidified to make a spherical one by RF (Ratio Frequency) thermal plasma process. Well spherical tungsten micro-particle was successfully obtained from spent scrap. In addition to the morphological change, thermal plasma process showed an advantage for the purification of feedstock particle.

Słowa kluczowe

EN

WC-Co; spent hard scrap; hydrometallurgy; RF thermal plasma

PL

WC-Co; twardy złom; hydrometalurgia; plazma termiczna

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2015
• Tom: Vol. 60, iss. 2B
• Strony: 1507--1509
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Han C.

• Incheon Regional Division (Korea Institute of Industrial Technology, Incheon, Korea)

autor

Na H.

• Department of Materials Science and Engineering, Yonsei University, Seoul, Korea

autor

Choi H.

• Incheon Regional Division (Korea Institute of Industrial Technology, Incheon, Korea)

autor

Kim Y.

• Incheon Regional Division (Korea Institute of Industrial Technology, Incheon, Korea)

Bibliografia

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