ered after crushing ... recycling of tungsten-bearing hard scrap. The present paper describes the conversion of tungsten heavy metal scrap into WC powder by dissolving the hard scrap in an Fe C or ...

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The “Cold-Stream” process is a mechanical method. The cemented carbide scrap is transported by a high velocity air-stream (>1000 km/h) to hit on a cemented tungsten carbide plate. Nitric acid is used to dissolve the binder medium (anodic dissolution of cobalt) at a current density of 2-10 A kg-1 of the scrap (an electrochemical process) [8 ...

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Tungsten carbide (WC) is chemically a binary compound of tungsten and carbon in the stoichiometric ratio of 93.87% tungsten and 6.13% carbon. However, industrially the term usually implies cemented tungsten carbides (CWC); a sintered powdered metallurgical product consisting of very fine grains of pure tungsten carbide bound or cemented together in a cobalt matrix. The size of the tungsten ...

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Recycling of hard materials like tungsten carbide scrap require specialised techniques. This paper presents a review of the different processes reported so far to recover valuable metals (W, Co) from cemented tungsten carbide scrap materials. Recycling techniques following either hydro or...

Jun 15, 2018 · Tungsten scrap recycling is a very important factor in the supply and demand of tungsten raw materials. Secondary tungsten resources contribute about 34% to tungsten consumption of which 10% is from scrap generated as rejects during processing and about 24% from used or worn-out tungsten carbide parts from industry .

Tungsten carbide is made up of rare physical properties that make it a unique raw material that is strong an Tungsten carbide grit made in recycle and crush scrap d wear resistant. In the machining industry, crushed tungsten carbide can be used on a variety of parts and components to increase durability as well as to produce precision finished ...