Tungsten Recycling Methods

FIGURE 11.3. Comparison of direct and indirect tungsten recycling methods. 

Any tungsten going in this direction cannot be recycled again by other methods, with the exception of re-melting. It finally ends up in loss by recycling dilution. 

Many hydrometallurgical processes or process steps are used to upgrade concentrates, process recycled scrap metal, or purify aqueous process steams. Examples are (I) the leaching of molybdenite concentrate to remove Knpurities ,ft (2) leaching of tungsten carbide and molybdenum scrap-, (3) removal of copper impurities in nickel anolyte by cementation on metallic ruckel and (4) various methods for treating nuclear fuel elements. 

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