Additives for suppressing tungsten leachability

Details Additives for suppressing tungsten leachability Additives for suppressing tungsten leachability

B - Operations, Transporting

22

F

B22F 1/00 (2006.01)

Patent

CA 2532768

The leachability of tungsten in an aqueous medium may be suppressed by combining tungsten metal with a metal oxide or metal salt that will form an insoluble tungsten- containing compound when the mixture is brought into contact with an aqueous medium. The additive is preferably present in an amount from about 1 weight percent (wt.%) to about weight percent of the tungsten of the tungsten. Preferred additives are lead oxide and calcium sulfate.

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